PROCEEDINGS OF THE WABER SuDBE CONFERENCE 2024 30 – 31 July 2024 University of the Witwatersrand Johannesburg, South Africa EDITORS Prof. Samuel Laryea, University of the Witwatersrand, South Africa Prof. Baizhan Li, Chongqing University, China A/Prof. Emmanuel Adu Essah, University of Reading, United Kingdom A/Prof. Sarfo Mensah, Kumasi Technical University, Ghana Prof. Hong Liu, Chongqing University, China Prof. Runming Yao, University of Reading, UK/Chongqing University, China ISBN: 978-0-7961-6032-4 In collaboration with: i Proceedings of the WABER SuDBE 2024 Conference 30th – 31st July 2024 University of the Witwatersrand, Johannesburg, South Africa © Copyright The copyright for papers in this publication belongs to the authors of the papers. ISBN: 978-0-7961-6032-4 (e-book) The ISBN for this publication was provided by the National Library of South Africa. Legal deposits of the publication have been supplied to the National Library of South Africa, Library of Parliament, and other places of Legal Deposit. First published in July 2024 Published by: WABER SuDBE Conference 2024 C/o Professor Samuel Laryea, Conference chair School of Construction Economics and Management University of the Witwatersrand, Johannesburg, South Africa Email: info@wabersudbe.com / samuel.laryea@wits.ac.za Website: www.wabersudbe.com Editors Prof Samuel Laryea, University of the Witwatersrand, South Africa Prof Baizhan Li, Chongqing University, China A/Prof Emmanuel Adu Essah, University of Reading, United Kingdom A/Prof Sarfo Mensah, Kumasi Technical University, Ghana Prof Hong Liu, Chongqing University, China Prof Runming Yao, University of Reading, UK / Chongqing University, China Declaration All papers in this publication have been through a review process involving a review of abstracts, peer review of full papers by at least two referees, reporting of comments to authors, revision of papers by authors and re- evaluation of the revised papers to ensure quality of content. ii TABLE OF CONTENTS Table of Contents ii Foreword iii Conference organising and scientific committee v Confirmation of 60/40 rule ix Programme and profile of speakers xi Conference themes xv Conference papers xvii Index of authors 169 Index of keywords 173 iii FOREWORD It is my pleasure to welcome you to this special WABER SuDBE Conference 2024 which is a joint international conference co-organised by the West Africa Built Environment Research (WABER) Conference and the International Conference on Sustainable Development in Building and Environment (SuDBE) in collaboration with various partners. The International Conference on Sustainable Development in Building and Environment (SuDBE) was initiated in 2003 by the National Centre for International Research of Low- carbon Green Buildings at Chongqing University, China. The West Africa Built Environment Research (WABER) Conference was initiated in 2008 as an initiative of the School of Construction Management and Engineering, University of Reading, UK, and provides a platform for sharing the latest ideas in built environment research on the African continent. I am pleased to welcome everyone to Wits University, Johannesburg. I hope you enjoy this Conference in the beautiful environment of our university. There are two days of technical presentations and an industry panel discussion, with a welcome cocktail party on the first night, and a conference dinner on the second night. This is followed by two days of technical tours, which provide an opportunity to see some landmark buildings in Pretoria, and two green rated developments by Growthpoint Properties in Rosebank and Sandton, Johannesburg. The technical presentations consist of seven keynote speeches and 130 paper presentations. The keynote speeches focus on an array of interesting topics that relate to the general conference theme of sustainable built environments. We have four keynote speeches relating to the theme of adaptability of the built environment to climate change and the sustainable development goals. The three other keynote speeches address matters of resilient and sustainable futures, the use of digital technologies to improve the sustainability of buildings, and artificial intelligence and carbon neutrality. The academic and industry leaders speaking on these topics are very experienced and their keynote presentations are expected to stimulate new ideas and discussion in the conference. The accepted papers to be presented in the parallel sessions relate to eight themes namely: • Climate Responsive Built Environments • Air Quality and Healthy Building • Thermal Comfort and Intelligent Operation • Low Carbon Technology and Energy System • Sustainable Urban Renewal • Building Technology and Performance • Construction and Project Management • Real Estate and Property Management Thank you and congratulations to all the authors of papers in this publication. I also want to sincerely recognise and appreciate the efforts of the 154 reviewers from 21 different countries who assisted enormously with the scientific work of reviewing the abstracts and full papers submitted for this Conference. We initially received 191 abstracts that were thoroughly reviewed to provide comments and decisions to authors. 161 full papers were subsequently received, and we would like to express our deepest appreciation to the reviewers below who did the hardwork of reviewing the 161 full papers and providing review reports which assisted the editors to make decisions on the papers and control the quality of the papers accepted for publication in the proceedings. Ultimately, 123 papers were accepted and published in this iv conference proceedings. I extend special thanks to A/Prof Emmanuel Essah and A/Prof Sarfo Mensah for leading the review processes and performing extensive editorial duties. There are also two workshops taking place during the conference. The first one is a Workshop on "Low-carbon urban and city development towards carbon neutrality" which is led by Prof Yong Ding from Chongqing University. The second one is a Workshop on Sustainable construction industry growth which is facilitated by the cidb Centre of Excellence at Wits University. Lastly, we also have an industry panel discussion on the risks associated with South African renewable energy projects. This will be facilitated by A&O Shearman whom we are proud to have as our partners for this conference. The conference programme presents a valuable package that will facilitate intellectual and practical discussions on sustainable built environments and the construction sector’s role in addressing the global challenge of climate change and the sustainable development goals (SDGs). Special thanks to all our conference partners particularly A&O Shearman, the Construction Industry Development Board (cidb), Gauteng Tourism, and Growthpoint Properties for your valuable support. I would conclude by wishing all participants a stimulating, rewarding and enjoyable conference. I look forward to enjoying your presentations, debates and company over the conference period of 29th July to 2nd August. Thank you. Professor Samuel Laryea WABER SuDBE 2024 Conference Co-Chair Wits University, Johannesburg, South Africa 29th July 2024 v CONFERENCE ORGANISING COMMITTEE • Professor Samuel Laryea, Wits University, South Africa, Conference Co-Chair • Professor Baizhan Li, Chongqing University, China, Conference Co-Chair • Professor Runming Yao, University of Reading, UK / Chongqing University, China, Conference Secretary • Professor Hong Liu, Chongqing University, China, Conference Secretary • A/Professor Emmanuel Essah, University of Reading, UK, Conference Secretary CONFERENCE SCIENTIFIC COMMITTEE AND REVIEW PANEL 1. Prof. Samuel Laryea, Wits University, Johannesburg, South Africa 2. A/Prof Emmanuel Essah, University of Reading, United Kingdom 3. A/Prof Sarfo Mensah, Kumasi Technical University, Kumasi, Ghana 4. Prof Runming Yao, University of Reading, UK / Chongqing University, China 5. Prof Zhiwen Luo, Cardiff University, United Kingdom 6. Prof Bankole Awuzie, University of Johannesburg, South Africa 7. A/Prof Collins Ameyaw, Kumasi Technical University, Ghana 8. A/Prof Ebenezer Adaku, Ghana Institute of Management and Public Administration, Ghana 9. A/Prof Ehsan Saghatforoush, Wits University, Johannesburg, South Africa 10. A/Prof Elvis Attakora-Amaniampong, SDD-UBIDS, Ghana 11. A/Prof Haruna Musa Moda, University of Doha for Science and Technology, Doha, Qatar 12. A/Prof Ian Ewart, University of Reading, Reading, United Kingdom 13. A/Prof Justus Agumba, Tshwane University of Technology, South Africa 14. A/Prof Kathy Michell, University of Cape Town, South Africa 15. A/Prof Kola Akinsomi, Wits University, South Africa 16. A/Prof Lekan Amusan, Covenant University, Nigeria 17. A/Prof Mehdi Shahrestani, University of Reading, Reading, United Kingdom 18. A/Prof Moshood Fadeyi, Singapore Institute of Technology, Singapore 19. A/Prof Norhayati Mahyuddin, University of Malaya, Kuala Lumpur, Malaysia 20. Dr. Ogbeifun Edoghogho, University of Jos, Nigeria / Univ. of Johannesburg, South Africa 21. A/Prof Shen Wei, University College London, United Kingdom 22. Prof Divine Ahadzie, Kwame Nkrumah University of Science and Technology, Ghana 23. A/Prof Yakubu Aminu Dodo, Najran University, Saudi Arabia 24. A/Prof Yewande Adewunmi, Wits University, South Africa 25. A/Prof. Alex Opoku, University of Sharjah, United Arab Emirates 26. A/Prof. Callistus Tengan, Bolgatanga Technical University, Ghana 27. A/Prof. Ebenezer Boakye, Takoradi Technical University, Takoradi, Ghana 28. A/Prof. Emmanuel Manu, Nottingham Trent University, United Kingdom 29. A/Prof. Evans Zoya Kpamma, Sunyani Technical University, Ghana 30. A/Prof. Francis Kwesi Bondinuba, Kumasi Technical University, Ghana 31. A/Prof. Mavis Osei, Kwame Nkrumah University of Science and Technology, Ghana 32. A/Prof. Richard Ohene Asiedu, Koforidua Technical University, Ghana vi 33. Dr Adedeji Afolabi, Covenant University, Nigeria 34. Dr Adwoa Ofori, Trinity College Dublin, Ireland 35. Dr Afolabi Dania, University of Westminster, London, United Kingdom 36. Dr Akosua B.K. Amaka-Otchere, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana 37. Dr Amna Shibeika, University of Reading, Reading, United Kingdom 38. Dr Baba Adama Kolo, Ahmadu Bello University, Nigeria 39. Dr Bashar Mohammed Al-Falah, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia 40. Dr Bismark Duodu, Kwame Nkrumah University of Science and Technology, Ghana 41. Dr Bruno Lot Tanko, University of Reading-Malaysia, Johor, Malaysia 42. Dr Christopher Amoah, University of the Free State, South Africa 43. Dr Christos Halios, University of Reading, United Kingdom 44. Dr Cynthia Adeokun, O.N.A Architects Ltd., United Kingdom 45. Dr Emmanuel Selorm Adukpo, University College London, United Kingdom 46. Dr Eng L Ofetotse, Greenwich University, London, United Kingdom 47. Dr Faizah Mohammed Bashir, University of Hail, Hail, Saudi Arabia 48. Dr Folake Ekundayo, Design Studio, United Kingdom 49. Dr Frank Ametefe, University of Cape Town, South Africa 50. Dr Gabriel Nani, Kwame Nkrumah University of Science and Technology, Ghana 51. Dr Geoff Cook, University of Reading, United Kingdom 52. Dr Hafizah Mohd Latif, Universiti Teknologi MARA, Malaysia 53. Dr Hua Zhong, Nottingham Trent University, United Kingdom 54. Dr Immanuel Darkwa, Trinity College Dublin, Ireland 55. Dr Jeremy Gibberd Wits University, Johannesburg, South Africa 56. Dr Jesse Nor, Abuja Metropolitan Management Council, Abuja, Nigeria 57. Dr Koech Cheruiyot, Wits University, Johannesburg, South Africa 58. Dr Kwadwo Oti-Sarpong, University of Cambridge, United Kingdom 59. Dr Lewis Abedi Asante, Kumasi Technical University, Ghana 60. Dr Lovelin Obi, Northumbria University , United Kingdom 61. Dr Lungie Maseko, Wits University, Johannesburg, South Africa 62. Dr Luqman Oyewobi, FUT, Minna, Nigeria 63. Dr Mate Janos Lorincz , University of Reading, United Kingdom 64. Dr Maxwell Antwi-Afari Fordjour, Aston University, United Kingdom 65. Dr Michael Peters, University of Reading, United Kingdom 66. Dr Mojtaba Amiri, Wits University, Johannesburg, South Africa 67. Dr Neil Govender, Wits University, Johannesburg, South Africa 68. Dr Oluseyi Odeyale, University of Ibadan, Nigeria 69. Dr Oluwaseun Dosumu, University of Rwanda, Rwanda 70. Dr Prisca Simbanegavi, Wits University, South Africa 71. Dr Qingqin Wang, China Academy of Building Research, China 72. Dr Ravi Rangarajan, University of Doha for Science and Technology, Qatar 73. Dr Razaq Sherif , Abuja Metropolitan Management Council, Abuja, Nigeria 74. Dr Rolien Terblanche, University of Cape Town, South Africa 75. Dr Ronan Champion, University of Reading, Reading, United Kingdom 76. Dr Sena Agbodjah, Academic City University College, Ghana vii 77. Dr Shiyu Han, Chongqing University, China 78. Dr Stanley Okangba, Wits University, Johannesburg, South Africa 79. Dr Thabelo Ramantswana, Wits University, South Africa 80. Dr Tunji-Olayeni Patience Fikiemo, Covenant University, Nigeria 81. Dr. Elijah Boadu Frimpong, Kumasi Technical University, Ghana 82. Dr. Elizabeth Ojo-Fafore, Wits University, South Africa 83. Dr. Emefa Amponsah, Takoradi Technical University, Ghana 84. Dr. Godwin Kumi Acquah, Kwame Nkrumah University of Science and Technology, Ghana 85. Dr. Isaac Mensah, Department of Feeder Roads, Accra, Ghana 86. Dr. Kofi Agyekum, Kwame Nkrumah University of Science and Technology, Ghana 87. Dr. Kofi Owusu Adjei, Kumasi Technical University, Ghana 88. Dr. Kwabena Fosuhene M-Ansong, Kumasi Technical University, Ghana 89. Dr. Kwadwo Twumasi-Ampofo, Center for Scientific and Industrial Research, Ghana 90. Dr. Michael Adabre, Hong Kong Polytechnic University, Hong Kong 91. Dr. Michael Nii Addy, Kwame Nkrumah University of Science and Technology, Ghana 92. Dr. Olumuyiwa Bayode Adegun, Federal University of Technology, Akure, Nigeria 93. Dr. Stephen Agyefi-Mensah, Cape Coast Technical University, Ghana 94. Dr. Kwabena Abrokwa Gyimah, Kwame Nkrumah Univ. of Science & Technology, Ghana 95. Dr. Timothy Crentsil, Kumasi Technical University, Ghana 96. Dr Bernard Acheampong, University of Reading, United Kingdom 97. Mr Faranani Gethe, Wits University, Johannesburg, South Africa 98. Mr Hillary Chanda, University of Reading, United Kingdom 99. Mr. Kingford Mkandawire, University of Reading, United Kingdom 100. Ms Emma Ayesu-Koranteng, Nelson Mandela University, South Africa 101. Ms Lerato Mompati, Wits University, Johannesburg, South Africa 102. Ms Zamageda Zungu, Wits University, Johannesburg, South Africa 103. Oscar Kwasafo, Wits University, Johannesburg, South Africa 104. Prof Cheng Sun, Harbin Institute of Technology, China 105. Prof Da Yan, Tsinghua University, China 106. Prof Dengjia Wang, Xi’an University of Architecture and Technology, China 107. Prof Xinhua Xu, Huazhong University of Science and Technology, China 108. Prof Yong Ding, Chongqing University, China 109. Prof Zhijian Liu, North China Electric Power University, China 110. Prof Abimbola Windapo, University of Cape Town, South Africa 111. Prof Ahmed Doko Ibrahim, Ahmadu Bello University, Nigeria 112. Prof Armando Oliveira, Porto University , Portugal 113. Prof Borong Lin, Tsinghua University, China 114. Prof Carmel Lindkvist, Norwegian University of Science and Technology, Norway 115. Prof Chi Feng, Chongqing University, 116. Prof Chimay Anumba, University of Florida, USA 117. Prof Christopher Pain , Imperial College London, United Kingdom 118. Prof Deji Ogunsemi, Federal University of Technology, Akure, Nigeria 119. Prof Eziyi Ibem, University of Nigeria, Nigeria 120. Prof Fidelis Emuze, Central University of Technology, Bloemfontein, South Africa 121. Prof George Ofori, London South Bank University, United Kingdom 122. Prof Guangyu Cao, Norwegian University of Science and Technology, Norway viii 123. Prof GWK Intsiful, University of Liberia, Liberia 124. Prof Immaculate Nwokoro, University of Lagos, Nigeria 125. Prof Jianlei Niu, Hong Kong Polytechnic University , China 126. Prof Joy Maina, Ahmadu Bello University, Nigeria 127. Prof Kemiki Olurotimi, Federal University of Technology, Minna, Nigeria 128. Prof Kulomri Adogbo, Ahmadu Bello University, Nigeria 129. Prof Larry Bellamy, University of Canterbury, New Zealand 130. Prof Linhua Zhang, Shandong Jianzhu University, China 131. Prof Nathaniel Aniekwu, University of Benin, Nigeria 132. Prof Neng Zhu, Tianjin University, China 133. Prof Nishani Harinarain, University of Kwazulu Natal, South Africa 134. Prof Prashant Kumar, University of Surrey, United Kingdom 135. Prof Ron Watermeyer, Infrastructure Options / Wits University, South Africa 136. Prof Runping Niu, Beijing University of Civil Engineering and Architecture, China 137. Prof Salman Azhar, Auburn University, USA 138. Prof Santiago Gassó-Domingo, Polytechnic University of Catalonia, Spain 139. Prof Sarah Hayes, Bath Spa University, United Kingdom 140. Prof Sasan Sadrizadeh, KTH Royal Institute of Technology, Sweden 141. Prof Shijie Cao, Southeast University, China 142. Prof Shilei Lyu, Tianjin University, China 143. Prof Stephen Oluigbo, Ahmadu Bello University, Nigeria 144. Prof Winston Shakantu, Nelson Mandela University, South Africa 145. Prof Xianting Li, Tsinghua University, China 146. Prof Xudong Yang, Tsinghua University , China 147. Prof. Humphrey Danso, University of Education, Winneba, Ghana 148. Dr Matthew Ikuabe, Wits University, South Africa 149. Dr Timothy Ayodele, Obafemi Awolowo University, Nigeria 150. Dr Chidinma Emma-Ochu, Federal Polytechnic Nekede Owerri, Nigeria 151. Dr Miriam Chukwuma-Uchegbu, Federal University of Technology Owerri, Nigeria 152. Dr Partson Paradza, BA ISAGO University, Botswana 153. Dr Lynda Mbadugha, Wits University, South Africa 154. Patricia Kio, Fitchburg State University, USA THANK YOU VERY MUCH TO ALL 154 REVIEWERS BASED IN 21 DIFFERENT COUNTRIES!!! ix CONFIRMATION OF DHET 60-40% CONFERENCE RULE 29th July 2024 TO WHOM IT MAY CONCERN I confirm that the papers accepted for publication in the WABER SuDBE 2024 Conference proceedings in July 2024 were peer-reviewed by at least two referees. The peer review process entailed initial screening of abstracts, review of full papers by at least two referees, reporting of the review reports to authors, revision of papers by authors, and re-evaluation of re- submitted papers to ensure quality of content. A paper is only accepted for publication in the conference proceedings based on the reviewers' recommendation. I also confirm that the accepted papers were from multiple institutions as detailed below. Institution No of papers % Ahmadu Bello University, Nigeria 3 2.4% Arusha Technical College, Tanzania 1 0.8% Ashesi University, Ghana 1 0.8% Beijing Institute of Technology, China 1 0.8% Central University of Technology, South Africa 3 2.4% Chongqing Jiaotong University, China 1 0.8% Chongqing University, China 51 41.5% Dalian University of Technology, China 2 1.6% Durban University of Technology, South Africa 3 2.4% Federal University of Technology, Akure, Nigeria 1 0.8% Federal University of Technology, Minna, Nigeria 1 0.8% Fitchburg State University, United States of America 1 0.8% Guangdong Midea Air-Conditioning Equipment Co. Ltd, China 3 2.4% Hebei University of Technology, China 2 1.6% Henan Polytechnic University, China 2 1.6% Huazhong University of Science and Technology, China 5 4.1% Kano State Polytechnic, Nigeria 1 0.8% Kumasi Technical University, Ghana 2 1.6% Kwame Nkrumah University of Science & Technology, Ghana 1 0.8% Norwegian University of Science & Technology, Norway 1 0.8% Obafemi Awolowo University, Nigeria 1 0.8% The University of Sheffield, United Kingdom 1 0.8% Tsinghua University, China 2 1.6% Universiti Teknologi MARA, Malaysia 1 0.8% University of Johannesburg, South Africa 1 0.8% University of KwaZulu-Natal, South Africa 4 3.3% University of Reading, United Kingdom 4 3.3% University of the Free State, South Africa 2 1.6% x University of the Witwatersrand, South Africa 12 9.8% Walter Sisulu University, South Africa 1 0.8% Wuhan University of Science and Technology, China 1 0.8% Wuhan University of Technology, China 2 1.6% Xi'an University of Architecture and Technology, China 1 0.8% Zhongkai University of Agriculture and Engineering, China 4 3.3% As shown in the table above, only 9.8% of the papers emanated from the University of the Witwatersrand, with the remaining 90.2% coming from diverse institutions. Based on the above, the WABER SuDBE 2024 Conference, met the 60-40 percentage policy. Papers accepted for publication were published via the conference proceedings. The conference proceedings’ ISBN is: 978-0-7961-6032-4 (e-book) Yours Sincerely, Prof Sam Laryea University of the Witwatersrand Co-Chair of WABER SuDBE 2024 Conference xi PROFILES OF KEYNOTE SPEAKERS Chimay Anumba is a Professor and Dean of the College of Design, Construction and Planning at the University of Florida. A Fellow of the Royal Academy of Engineering, FREng, he holds a Ph.D. in Civil Engineering from the University of Leeds, UK; a higher doctorate – D.Sc. (Doctor of Science) - from Loughborough University, UK; and an Honorary Doctorate (Dr.h.c.) from Delft University of Technology in The Netherlands. He has over 500 scientific publications and his work has received support worth over $150m from a variety of sources. He has also supervised 57 doctoral candidates to completion and mentored over 25 postdoctoral researchers. He is the recipient of the 2018 ASCE Computing in Civil Engineering Award and is a member of the US National Academy of Construction (NAC). Tim Broyd is Director of the Institute for Digital Innovation in the Built Environment and Professor of Built Environment Foresight at the University College London, The Bartlett School of Sustainable Construction. He moved to UCL following a career in industry, and has substantial experience as corporate director of technology, innovation and sustainability for globally operating engineering design consultancies, including both Atkins and Halcrow. In addition, he was CEO of construction industry research body CIRIA from 2002 to 2007. Within his new role he works with leading individuals in industry and government to understand and prepare for the challenges and opportunities that lie ahead. This recently included the responsibility for a 'foresight' input to the UK Government's developing strategy for construction as well as leading the strategic planning of the UK's development and implementation of BIM. Tim is a Fellow of the Royal Academy of Engineering, the Institution of Civil Engineers and the Royal Society for Arts, manufactures and Commerce. He is also a Visiting Professor in Construction Management at the University of Reading and in Civil Engineering at the University of Dundee. He has maintained an active engagement in the development and deployment of BIM techniques for over a decade, is Vice Chairman of BuildingSmart (UK) Ltd and sits on the UK Government's BIM Task Force. He is also a Director of CEEQUAL Limited, which is responsible for developing and marketing CEEQUAL, the world's leading Keynote Title: Resilient and Sustainable Futures – Opportunities to Leverage Emerging Technologies Professor Chimay Anumba FREng, Ph.D., D.Sc., Dr.h.c., CEng/PE, FICE, FIStructE, FASCE, NAC University of Florida, USA Keynote Title: The use of digital techniques to improve the sustainability of buildings Professor Tim Broyd University College of London, UK xii technique for assessing the sustainability of infrastructure projects. He became Vice President of the Institution of Civil Engineers in 2011, with particular responsibility for Public Voice and Policy. He was subsequently elected the 152nd President of the Institution of Civil Engineers, taking office in November 2016. Borong LIN is the Professor and Deputy Dean in the Faculty of Building Science and technology at Tsinghua University. He also serves as the Dean of Key Laboratory of Eco Planning & Green Building commissioned by the Ministry of Education, and the Fellow of IBPSA (International Building Performance Simulation Association). Prof. Lin was the winner of The National Science Fund for Distinguished Young Scholars in 2018, awarded the National Changjiang Scholar at 2019 and 2020 Xplorer Prize. He was selected as World's Top 2% Scientists by Stanford University and Elsevier China Highly Cited Scholars. Prof. Lin’s research focuses on the whole life cycle technology innovation for enhancing built environment quality, energy efficiency and carbon neutrality from the architectural design phase to new product development and real operation. As PI, Prof. Lin won the second prize of national S&T award and 5 first prize of provincial or ministerial S&T awards. He has published over 150 SCI journal papers and is an editorial member of five international peer reviewed journals. Jeremy Gibberd is a Co-coordinator of the Construction Industry Board (CIB) Working Group (W116) on Smart and Sustainable Built Environments (SASBE) and a member of the Multi-stakeholder Advisory Committee (MAC) of UNEP’s Sustainable Building and Construction programme. He has developed specialist expertise in sustainable built environments, education and community architecture, building performance analysis and facilities management. Jeremy completed his PhD at the University of Pretoria in 2003 on methodologies for integrating sustainability into built environments in developing country contexts. Jeremy has lectured on environmental design, advanced technology and design at SCAD in the USA and has developed and taught courses on urban design, architectural design, materials, sustainability, energy and facilities management with various organisations. He regularly works as a research scientist and consultant to government, business and community organisations. Jeremy has published widely and Keynote Title: Artificial intelligence and carbon neutrality: several case studies Professor Borong Lin Tsinghua University, China Keynote Title: Sustainability through smart infrastructures Professor Jeremy Gibberd University of the Witwatersrand, South Africa xiii presented as invited or keynote speaker at numerous international meetings and conferences. Humphrey Danso is a Professor and Dean of the School of Graduate Studies at Akenten Appiah Minkah University of Skills Training and Development in Ghana. Previously, he was also Dean of the Faculty of Technical Education. He holds a PhD in Civil Engineering from the University of Portsmouth, United Kingdom; MPhil in Civil Engineering from Voronezh State University of Architecture and Civil Engineering, Russia; MSc in Strategic Management and Leadership, Kwame Nkrumah University of Science and Technology, Ghana, 2019-2021; and MTech in Competency-Based Training from the University of Education Winneba in Ghana. Humphrey has published over Ninety (90) publications in international outlets in the areas of construction materials, construction management, and sustainable construction. Kathy is on the full-time academic staff at the University of Cape Town and was Head of the Department of Construction Economics and Management from 2017 to 2020 and the Deputy Dean for Undergraduate Studies (Teaching & Learning) in the Faculty of Engineering and the Built Environment from 2021 – 2023. Kathy holds a Doctorate in property and facilities management from the University of Salford (United Kingdom), an MPhil in cost and systems engineering and BSc (Hons) in Quantity Surveying from the University of Cape Town. She is the Director of the Sustainability oriented and Cyber Research Unit for the Built Environment at UCT. She is a registered Professional Quantity Surveyor with the South African Council for the Quantity Surveying Profession and a member of the Royal Institution of Chartered Surveyors, the Association of South African Quantity Surveyors, and the South African Facilities Management Association. Kathy is a Past-President of the South African Council for the Quantity Surveying Profession and served a four-year term as a Council Member on the Council for the Built Environment in South Africa. She was the Africa Market Seat on the Governing Council of the Royal Institution of Chartered Surveyors (2020 – 2023), is a current member of the Board of the Keynote Title: Sustainability through construction materials Professor Humphrey Danso AAMUSTED University, Ghana Keynote Title: Sustainable urban development and management Professor Kathy Michell University of Cape Town, South Africa xiv CIB International Council for Building and Construction Research, a member of the International Facilities Management Association Research Advisory Committee and is a founding Director of the Africa Facilities Management Association. . Ron Watermeyer served as the South African Institution of Civil Engineering’s 101st President in 2004. In 2009 he obtained a senior doctorate (Doctor of Engineering) from the University of the Witwatersrand for his engineering development work which has significantly contributed to the delivery of infrastructure for the advancement of a changing South African society. He has published more than 100 papers, articles and book chapters on various aspects on the delivery of infrastructure. He is currently a Trustee of Engineers Against Poverty (London based international charity), a visiting adjunct professor, School of Construction Economics and Management, University of the Witwatersrand, the Chair of ISO TC 59 / SC18 (Construction procurement), a Member of the Certification Board of FIDIC Credentialing Limited and a Director of Infrastructure Options (Pty)Ltd. Ron has been at the forefront of many development initiatives in South Africa since the early 1990s. He has reinterpreted building regulations, developed systems for the classification of sites in terms of geotechnical characteristics and building practice and established technical requirements for a structural warranty scheme for houses. He has also changed construction methods, technologies and practices to facilitate socio- economic development imperatives and pioneered the development of construction procurement procedures, practices, tactics and strategy and client delivery management practices aimed at improving infrastructure project outcomes. Keynote Title: Role of the client in achieving sustainable built environments Professor Ron Watermeyer DEng, CEng, PrEng, PrCM, PrCPM, Hon.FSAICE, FIStructE, FICE, FSAAE University of the Witwatersrand, South Africa xv CONFERENCE THEMES • T1 Climate Responsive Built Environments • T2 Air Quality and Healthy Building • T3 Thermal Comfort and Intelligent Operation • T4 Low Carbon Technology and Energy System • T5 Sustainable Urban Renewal • T6 Building Technology and Performance • T7 Construction and Project Management • T8 Real Estate and Property Management xvii CONFERENCE PAPERS T1 CLIMATE-RESPONSIVE BUILT ENVIRONMENTS 1 A unified data mining framework for air source heat pump performance prediction and key influencing factor analysis – Yang, Y., Lin, B., Geng, Y., Pei, X. and Ji, W 2 Addressing compliance checking matters of buildings to green standards using natural language processing: a review – Yamusa, M. A., Abdullahi, M., Ibrahim, Y. M., Ahmadu, H. A., and Abubakar, M. 11 Analyzing urban spatial agglomeration based on POI data: a case study of Shihezi city, Xinjiang – Han, Y., Liu, Q., Wu, X. and Su, Y. 21 Climate adaptation mechanism of traditional Yi dwellings from an e[m]ergy perspective – Ahou, Y., Yang, Z. and Xia, Q. 30 Exploration of the sustainable design strategies for the social houses of rural area – Wang, M. and Duan, D. 45 Female students’ perceptions of environmental sustainability: a case study of a university building in the UAE – Shibeika, A. 46 Hydrophobicity optimization and exploration of a novel building envelope material – Zhao, H., Wu, S., Wu, Y., Sun, H. and Lin, B. 57 Infrastructure in Johannesburg from a sustainable development perspective – Jia, S. and Yang, Y 65 Numerical simulation study on the effect of water diffuser on the performance of heat storage tank – Ren, Y., Ren, Z., Xiao, Y., Zhang, Z., Yang, Z., Pang, Y.. and E, Reaihan. 76 Research and application of ecological environment functional materials in China – Liang, J., Lei, Y., Han, X., Dong, B. Zhang, H., Zhang, N. and Wang, L. 88 Study of the moisture buffering characteristics of building envelopes with double-layer hygroscopic materials – Liu, S., Yan, T., Xu, X., Wan, H. and Huang, G. 99 Towards a decision support for green public procurement implementation: a review of the primary decision- making factors – Yamusa, M. A., Abubakar, M., Nasir, R. M. and Abdulzaziz, M. 110 T2 AIR QUALITY AND HEALTHY BUILDING 118 A study of the effect of air purifiers on the concentration of particulate matter in primary school classrooms – Luo, H., Chen, Y., Yuan, F. and Yao, R. 119 A study of the effect of indoor glare on personnel's emotions based on the PAD (Pleasure-Arousal-Dominance) emotion model – Li, H. Zhu, Y., Song, B. and Li, B. 127 An experimental study of human activity patterns on particle resuspension in a test chamber – Yuan, F., Luo, H. and Yao, R. 138 Analysis on occupant behavior and energy consumption characteristics of air conditioning usage in residential buildings – Ao, J., Chen, Z., and Du, C. 149 Characteristics and prediction of air conditioners use in residential rooms based on fractal theory – Fu, C., Liu, M. and Li, Z. 158 Distribution and characteristic analysis of indoor thermal environment monitoring points during air conditioning heating – Ding, Y., Yu, Z. and Liu, Y. 168 Evaluation of the aerosol transport behaviour and infection risk in an isolation ward by a CFD modelling – Wang, F., Wang, Y., Zhang, Y. and Xu, X. 179 Experimental study of the disinfection efficacy of microwave radiation on A. Variegatus attached to the filter – Zhang, Y., Xu, X., Wang, F. and Yan, T. 191 Implications of indoor heating terminals on allergic and respiratory diseases in childhood: repeated cross- sectional surveys in China – Wang, C., Yu, W., Wei, S., Zhou, H. and Zhang, Y. 201 Indoor particles exposure and air filtration intervention association with children health-review – Zhong, T. and Du, C. 212 Investigating the impact of the indoor environmental quality of vehicles with different fuel transmission: emphasis on particulate matter –Mohamed, A. and Essah, E., A. 229 Relationship between indoor environment factors of residential settings and rheumatic diseases in older adults – Gao, N. and Yu, W. 240 Research on the correction method of carbon dioxide monitoring sensor in human respiratory zone – Wang H. and Yu W. 249 xviii Study on efficient removal technology of toluene from indoor ambient air – Wang, J., Chen, J., Chen, D. and Yang, C. 257 The effect of air purifiers on the concentration of particulate matter 2.5 -a review – Cheng, L. and Li, M. 267 The impact of different indoor mould concentrations on lung tissue inflammation in mice – Wu, M., Du, C., Ma, P. and Yang, X. 277 The impact of short-term exposure to different air-conditioning environments on human thermal adaptation – Pan, Y., Shi F., Sun Z., Guo S. and Yan H. 286 The optimal parameters of airflow comfort and validation in air conditioners – Liu, Y., Wang, B., Wang, Y., Fan, J., Zhang, L. and Zhu, Y. 296 T3 THERMAL COMFORT AND INTELLIGENT OPERATION 306 A study of corrected skin wettedness levels in a downward outdoor-indoor temperature transient environment – Guo, J., Liu, H. and Chen, G. 307 A study of human perception and response under a high temperature local radiation – Wang, W., He, B. and Liu, H. 319 A study of the effect of long-term thermal history on thermal comfort of indoor occupants in summer climate chamber – Fu, Y. and Liu, H. 329 A study of thermal comfort experienced by postpartum women during sleeping hours – Wang, Y., Yu, W. and Shi, W. 339 Analysis of thermal comfort in indoor air conditioning environment for summer rest in hot summer and warm winter zone – Ma, X., Yu, W., Guo, L. and Zhang, Y. 349 Assessment of the effect of differences in human constitutional characteristics on thermal comfort – Ming, R., Miao, T., Wang, B., Wu, X. and Li, J. 358 Dynamic thermal sensation prediction model of the elderly using a machine learning method – Zhou, S. and Li, B. 367 Effects of different vegetation types on outdoor thermal comfort – Lei, H and Yuan, M. 377 Evaluation of the indoor environment and perceived IEQ: a case study in Norwegian primary schools – Chaulagain, A., Mathisen, H., M., Alam, B., G., Bartonova, A., Fredriksen, M., Høiskar, B., A., K., Gustavsen, K., Canet, A., M., Fredriksen, T. and Cao, G. 387 Experimental study on the thermal environment demand of underground stations in Chongqing – Ding, Y., Liu, Y. and Jiang, X. 399 Heat transfer analysis of separated gravity heat pipe used in a self-activated PCM wall – Xu, D., Yan, T., Xu, X., Wu, W., Long, W, Ming, T. and Wu, Y. 411 Human thermal comfort based dynamic regulation of air conditioning during cooling in residential buildings – Jing, M., Du, C., Zhang N. and Yu W. 422 Investigating the impact of infant BMI values on heat comfort perception in hot summer and cold winter regions – Shi, W., Yu W.,Zhou, H. and Wang Y. 439 Predictive control model for regional cooling system combined with ice storage technology – Tang, C. Bao, L. and Li, N. 449 Research on human thermal response in naturally slightly hotter indoor environment – Ding, Y. Zhou, Z. and Zhang, X. 459 Research on thermal comfort influence and improvement strategy of air conditioning dynamic environment – Guo, L., Yu, W., Zhang, Y. and Guo, R. 471 Study on the effect of light environment on human comfort in a warmer office environment – Bai, S., and Li, Z. 482 Study on thermal comfort of postpartum mothers in air-conditioned environment in summer – Huang, X., Yu, W., Du, C. and Zhou, H 494 Study on thermal sensation prediction and temperature satisfaction of air conditioning dynamic environment in winter – Zhang, Y., Yu, W. and Guo, L. 505 The spatiotemporal variation pattern of indoor thermal environment under different set temperatures in summer intermittent convective cooling environment – Guo, S., Sun, Z., Shi, F., Pan, Y. and Yan, H. 515 Thermal comfort in hot summer and cold winter area with retrofitted traditional electric heating devices (Huo Xiang) – Huang, D. and Liu, H. 527 xix Thermal comfort in urban parks: a review – Zheng, P. and Yao, R 536 Thermal comfort prediction model based on optimized random forest algorithm – Jiang, Y. 545 T4 LOW CARBON TECHNOLOGY AND ENERGY SYSTEM 555 A general energy saving potential evaluation method of a pipe-embedded wall integrated with natural energy based on revised degree hour – Fan, S., Yan, T., Tang, X., Yu, Z., Li, X., Lyu, W. and Xu, X. 556 A low-carbon distributed energy system suitable for residents in mountainous areas of southwestern China: a case study of Weining County in Guizhou Province – Zhang, Z. and Xiao, Y. 567 Achieving sustainability in student housing: nexus of student housing design and energy use behaviour in northern Ghana – Appau, W. M., Anugwo, I. C., Attakora-Amaniampong, E. and Simpeh, F. 579 Comprehensive life cycle assessment of carbon emissions in the construction industry: a review of methods, tools, and applications – Zhu, T., Hua, J., Huang, L. and Zhang, X. 591 Developing an integrated real-time urban construction carbon emission monitoring framework: towards sustainable urban development – He, Y., Ding, Y., Jiang, X. and Zhao, W. 602 Efficient matching method of cold and heat sources under dynamic load demand characteristics – Ding, Y., Yu, X., Jiang, X. and Zhao, W. 615 Energy-saving optimal control strategy of an ASHP integrated central air-conditioning system – Gao, J., Yang, Y., Yan, J., Xu, X. and Liu, Y. 627 Global energy-saving potential estimation of Radiative Sky Cooling (RSC) used in the pipe-embedded wall cooling system – Yan, T., Fan, S., Xu, X., Lyu, W., Ming, T. and Wu, Y. 639 Low carbon concrete formulation and construction technology in construction phase – Zhao, W., Ding Y., Lai, W., Jiang, X. and He Y. 650 Main accounting indexes of building carbon emissions – Ding, Y. and Chen, W. 661 T5 SUSTAINABLE URBAN RENEWAL 672 Application of Chinese traditional mural materials in modern architectural wall decoration – Liu, C. and Syed, A. S. A. B. 673 Correlation between summer outdoor thermal environment and comfort in urban block of Northern Xinjiang – Su, Y., Huang, Z. and Wu, X. 674 Effective integration of traditional mural elements to enhance the attractiveness and artistry of installation artworks through Ryan’s narrative theory – Li T., Feng Y., Ye Q. and Liu C. 685 Enlightenment of American buildings to China of sustainable integrated design –Zhu, X. 696 Environmental safety assessment of street road lighting combining visual characteristics and physical quantities – Liang, B., Huang, Z., Qin, Y., Li, Z.. and Luo, H. 707 Exploration of interactive dream analysis installation in art design in community public facilities – Ye, Q., Zeng, C., Li, T. and Liu, C. 717 Population, texture, green volume - the suitable density of historic districts based on intrinsic ecology – Hu, C. and Gong, C. 727 Public art and cultural education function of digital exhibition in museums – Li, L. 728 Research on design of interactive installation based on cultural sustainable intangible cultural heritage – Zeng, C., Ye, Q. , Li L. and Liu, C. 729 Temporal and spatial distribution characteristics of thermal environment of subway stations - an experimental study – Ding, Y., Jiang, X., He, Y., Zhao, W., Liu, Y. and Hou, Y. 739 The impact of road expansion on nearby infrastructure – the case of N11 in Mokopane, South Africa – Mogale, W., Musonda, E. and Harinarain, N. 752 Utilising African epistemologies to augment Collaborative Online International Learning (COIL) initiatives in the built environment field – Qumbisa, N. and Makhwabe, S. 763 T6 BUILDING TECHNOLOGY AND PERFORMANCE 775 A review of the impact of office lighting environment on employees’ emotional state – Li, M. and Cheng, L. 776 A review on indoor lighting evaluation regarding its' effects and indicators – Lin, S. and Du, C. 785 xx A study on the impact of enhancing window airtightness on residential building energy consumption in hot summer and cold winter region – Yu, Z., Zhang, C., Xu, X., Tang, X. and Yu, Z. 796 An advanced design method of intelligent buildings in sustainable development – Xia, Q., Yang, Z. and Ahou, Y. 804 Assessing the performance of PCM embedded non-linear thermal wall – Li, S., Ji, W., Liu, S., Kwanda, L, T. and Kusakana, K. 815 Development and prospection of occupant behavior in residential building – Liao, X, and Li, B. 826 Effect of elevated temperature on the mechanical properties of high volume recycled coarse aggregate concrete containing volcanic ash – Gambo, S., Yahaya, M. W. and Ibrahim, A. G. 837 Effects of masonry materials characteristics on painted external wall surfaces – Afful, M. O., Mensah, S., Orgen, N. K. and Ameyaw, C. 845 Experimental investigation on post-fire mechanical properties of Q960 ultra-high-strength steel after cold- forming process – Wang, J. and Shi, Y. 855 Housing characteristics and heat perception: comparison across formal and informal neighbourhoods in Lagos, Nigeria – Adegun, O. B., Morakinyo, T. E., Akinbobola, A., Obe, B. and Olusoga, O. O. 870 Impact of PCMC roof on indoor thermal-humidity environment and air conditioning energy consumption – Jiang, L., Gao, Y., Liu, S. Rashidov, J., Zhang, X. and Fan, Z. 881 Numerical study on lateral behavior of cold-formed steel composite shear wall – Xiaowei, R., and Yu, S. 893 Research on the structural regulation of sepiolite fibre and application as self-humidity-control functional building materials – Han, X., Tang, R., Hao, L., Dong, B., Wang, L. and Liang, J. 903 Sociotechnical system failure in construction projects: a distributed situation awareness of sky central roof damage – Mkandawire, K., Kabiri, S. and Connaughton, J. 915 The effect of Melanopic equivalent daylighting illuminance (m-EDI) on satisfaction and productivity in the workplace – Li, Z., Yao, R., Bai, S. and Zhu, Y. 927 Thermal properties of surrounding rock in deep-buried metro station fresh air shafts enhanced by phase change materials: a case study from Chongqing, China – Ren, Z., Ren, Y., Yang, Z., and Xiao, Y. 933 T7 CONSTRUCTION & PROJECT MANAGEMENT 945 A digital skills gap analysis of building inspectors: the case of the City of Johannesburg Metropolitan Authority – Gethe, F., Awuzie, B., Simbanegavi, P. and Chiloane, M. B. 946 Academia-industry linkages: a missing link in TVET institutions in Tanzania - Mhando, Y., Mamboya, F. and Chacha, M. 957 An evaluation of the quantitative risk assessment simulation undertaken during the planning stage of mega- projects – Zwane, S., Schutte, D., Maila, S. and Jones, R. 967 Ascertaining the knowledge of Ghanaian construction professionals on the use of clay bricks as a sustainable construction material – Darko, P., D., Nani, G., Mensah, N., A., A., O., Yusif, M. and Badii, P. 979 Barriers to digitalization of procurement – a review – Ojo-Fafore, E. and Laryea, S. 989 Bibliometric analysis of virtual reality in construction education – Kio, P., Ohochuku, C., Aduloju, T., and Agidani, J. 999 Bibliometric review of social value in construction literature – Laryea, S., Kwasafo, O., K. and Mensah, S. 1009 Buried alive: the challenges facing the emerging contractors in the Limpopo province, South Africa – Moeti, M., Amoah, C. and Le Roux, L. 1021 Challenges associated with differential measurements in stairs construction in low rise residential buildings – Boadi, E. O., Mensah, S., Ameyaw, C., Orgen, N. K. and Bondinuba, F. K. 1034 Construction materials management techniques used in building projects in Kano Metropolis, Nigeria – Wudil, B. I., Bashir, K., K., Sani U., and Aikawa, I. U. 1044 Detecting and preventing unbalanced bidding in South African public sector construction – Tilese, N., Makhaga, T., Mphahlele, M. and Zungu, Z. 1052 Establishing success and failure factors of circular economy transitions in property development firms: a servitized business model approach – Nemakhavhani, R., Awuzie, B. and Aigbavboa, C. 1062 Evaluating the new universities project outcomes using the PMBOK project performance domains – Mosalaesi, T. and Laryea, S. 1072 xxi Exploring the challenges in the performance of small-medium contractors in South Africa: a consultants' perspective – Simpeh, F., Baba, V. and Anugwo, I., C. 1083 Fostering construction firm resilience through persuasive narratives of strategy: a conceptual framework – Zungu, Z., Laryea, S. and Nkado, R. 1093 Investigate the potential impact of individual tracking technology in the Construction Industry – Lai, H., Y. and Essah, E., A. 1104 Investigating management practices in the construction and delivery of electricity projects in Nigeria – Oladiran, O., J. and Oguntona, O., A. 1114 Key barriers to green building implementation in South Africa – Mompati, L., Mandlate, M., Kabini, K. and Nomvalo, U. 1125 Modelling leadership development determinants in Ghana’s construction industry: the moderating role of professional capability – Sam, A.. Aigbavboa, C. O. and Thwala, W. D. 1137 Perceptions of tender document quality and its impact on construction estimates – Nezambe, B. Laryea, S. and Govender, N. 1151 Risk factors that contribute to the collapse of major construction companies: the case of fallen South African construction giants – Scholtz, R., Deacon, H., A., Le Roux, L. and Amoah, C. 1159 Team communication in the built environment: the South African land surveyor’s perspective – Harinarain, N. and Mbanjwa, S. 1175 The job satisfaction of black female quantity surveyors – Punungwe, F. and Terblanche, R. 1185 Understanding mason training in South Africa – Khuzwayo, B., Walker, M. and Graham, B. 1195 Using dynamic BIM to improve construction safety culture – Amiri, M., Saghatforoush, E. and Laryea, S. 1205 Wearable technology to reduce fatigue risks for construction workers: a scoping review – Mtetwa, S. I., Mollo, L., G. and Emuze, F., A. 1219 T8 REAL ESTATE AND PROPERTY MANAGEMENT 1232 Assessment of void periods in residential buildings in Minna, Nigeria – Ogunbajo, R. A. and Kuma, S. S. 1233 Prop-tech trend in Nigerian real estate practice: adoption and challenges – Araloyin, F. M., Fateye, T. B. and Adebowale, O. O. 1245 Remote sensing to map and estimate the extent of flood damage – a South African case study – Malusi, B., Musonda, E. and Harinarain, N. 1257 Residential choice and preferences in Ashesi University: comparative study of stated and revealed preferences – Doamekpor, N., A., A., Nyarko, G., K. and Adeku, V. 1269 The impact of inflation on house prices in South Africa: effects of COVID-19 – Mpofu, B., Simbanegavi, P., Moobela, C. and Weaich, M. 1281 Utilisation of digital elevation modelling to determine areas affected by floods in KwaZulu-Natal – Zwane, S., Musonda, E. and Harinarain, N. 1297 INDEX OF AUTHORS 1309 INDEX OF KEYWORDS 1313 1 T1 CLIMATE-RESPONSIVE BUILT ENVIRONMENTS A unified data mining framework for air source heat pump performance prediction and key influencing factor analysis – Yang, Y., Lin, B., Geng, Y., Pei, X. and Ji, W 2 Addressing compliance checking matters of buildings to green standards using natural language processing: a review – Yamusa, M. A., Abdullahi, M., Ibrahim, Y. M., Ahmadu, H. A., and Abubakar, M. 11 Analyzing urban spatial agglomeration based on POI data: a case study of Shihezi city, Xinjiang – Han, Y., Liu, Q., Wu, X. and Su, Y. 21 Climate adaptation mechanism of traditional Yi dwellings from an e[m]ergy perspective – Ahou, Y., Yang, Z. and Xia, Q. 30 Exploration of the sustainable design strategies for the social houses of rural area – Wang, M. and Duan, D. 45 Female students’ perceptions of environmental sustainability: a case study of a university building in the UAE – Shibeika, A. 46 Hydrophobicity optimization and exploration of a novel building envelope material – Zhao, H., Wu, S., Wu, Y., Sun, H. and Lin, B. 57 Infrastructure in Johannesburg from a sustainable development perspective – Jia, S. and Yang, Y 65 Numerical simulation study on the effect of water diffuser on the performance of heat storage tank – Ren, Y., Ren, Z., Xiao, Y., Zhang, Z., Yang, Z., Pang, Y.. and E, Reaihan. 76 Research and application of ecological environment functional materials in China – Liang, J., Lei, Y., Han, X., Dong, B. Zhang, H., Zhang, N. and Wang, L. 88 Study of the moisture buffering characteristics of building envelopes with double-layer hygroscopic materials – Liu, S., Yan, T., Xu, X., Wan, H. and Huang, G. 99 Towards a decision support for green public procurement implementation: a review of the primary decision- making factors – Yamusa, M. A., Abubakar, M., Nasir, R. M. and Abdulzaziz, M. 110 Yang, et al. (2024) A unified data mining framework for air source heat pump performance prediction and key influencing factor analysis In: Laryea, S. et al. (Eds) Proceedings of the WABER SuDBE Conference, 30 to 31 July 2024, Johannesburg, South Africa 2-8 2 WABER SuDBE Conference 2024 30 - 31 July 2024 Johannesburg, South Africa ISBN: 978-0-7961-6032-4 A UNIFIED DATA MINING FRAMEWORK FOR AIR SOURCE HEAT PUMP PERFORMANCE PREDICTION AND KEY INFLUENCING FACTOR ANALYSIS Yuren Yang1, Borong Lin2, Yang Geng3, Xingyu Pei4 and Wenjie Ji5 1, 2, 3Key Laboratory of Eco Planning & Green Building, Tsinghua University, China; School of Architecture, Tsinghua University, China 4, 5School of Mechanical Engineering, Beijing Institute of Technology, China Air source heat pumps (ASHPs) have significant emission reduction potential, low operating costs, low maintenance requirements, and suitability for various geographic conditions. Accurate prediction and analysis for the operational performance of ASHPs is crucial for developing optimal control strategies and ensuring the efficient and stable operation of heat pump systems. This study proposes a framework utilizing machine learning algorithms for performance prediction and interpretability analysis of ASHP systems. The proposed framework comprises three modules: data preprocessing, model construction, and interpretability analysis. It focuses on predicting the performance of ASHP systems based on real-time operational parameters, meteorological parameters, time indices, and other features, as well as extracting key influencing features and analysing the effects of each feature on system performance across different intervals. The proposed framework was applied to an ASHP system in a secondary school in Beijing, China, achieving an accuracy of 78.24% in predicting its heating capacity for the next hour. The interpretability analysis was performed using the SHAP method, which is based on cooperative game theory. The analysis revealed that instantaneous flow rate had the greatest impact on the heating capacity, but its influence varied significantly across different flow rate intervals. Keywords: air source heat pump (ASHP), heating capacity, interpretability analysis, machine learning INTRODUCTION Electrification of thermal energy can be achieved through traditional direct electric heating or heat pumps. Compared to direct electric heating, heat pumps offer higher efficiency and lower carbon emissions. The efficiency of heat pumps is three to four times that of fossil fuel systems (Wang, Wang & He 2022), thereby improving global heating energy efficiency. In 2020, the heat pump market exceeded $53 billion, with air source heat pumps (ASHPs) comprising over 90% of the market (Huang et al. 2023). This dominance is attributed to their substantial emission reduction potential, low operating costs, minimal maintenance requirements, and adaptability to various geographic conditions. ASHPs are systems that utilize low-temperature heat energy in the air for heating or cooling purposes. They transfer heat energy from the air to 1 yangyuren@mail.tsinghua.edu.cn 2 linbr@tsinghua.edu.cn 3 gengy@tsinghua.edu.cn 4 pxy0937@gmail.com 5 jiwenjie@bit.edu.cn Yang, et al. 3 the heating or cooling system, thereby regulating indoor temperatures (Carroll, Chesser & Lyons 2020). Compared to traditional heating and cooling systems, ASHPs offer advantages such as high efficiency, energy savings, environmental friendliness with no pollution, and stable operation safety. They are suitable for various building types, including residential, commercial, and industrial premises, making them a sustainable energy utilization method. This technology is of significant importance for reducing energy consumption and lowering carbon emissions. Accurate prediction for the operational performance of heat pumps is crucial for developing optimal control strategies and ensuring the efficient and stable operation of heat pump systems, especially considering the increasing prevalence of heat pump applications (Chen et al. 2023). For accurate prediction of heating capacity in ASHPs, it's essential to consider factors like outdoor temperature and humidity, heat carrier flow rate, compressor operating status, and supply and return water temperatures, among others. The operational state of ASHPs used in buildings or district heating stations is a complex nonlinear system. Modelling this system using conventional mathematical or physical models poses significant challenges. Additionally, ASHPs exhibit strong adaptability to their installation locations, which means that compared to other types of heat pump units like ground source heat pumps or water source heat pumps, the environmental conditions surrounding ASHPs are highly unstable, adding complexity to mathematical and physical model construction (Congedo et al. 2023). In recent years, the rapid advancement of artificial intelligence (AI) technologies has led to data-driven algorithms, represented by machine learning (ML), gradually replacing traditional modelling methods for various types of complex nonlinear systems. ML algorithms leverage large volumes of system operational data recorded and stored based on IoT technology. They use pattern recognition and data analysis to capture the complexity and nonlinear characteristics of systems, enabling accurate prediction of system behaviour and optimization control. Chen et al. trained an artificial neural network to predict the Coefficient of Performance (COP) of ground source heat pump units using environmental parameters and hourly power consumption data as input features, and the findings indicated that the ML algorithm achieved greater prediction accuracy compared to the empirical regression model (Chen et al. 2023). Eom et al. used a deep learning-based single model to quantitatively predict the variations in heating capacity, power consumption, and COP of ASHPs due to frosting, which facilitated the optimization of defrost startup control strategies (Eom et al. 2021). Therefore, for complex nonlinear systems like ASHPs, ML algorithms hold the promise of better handling the complexity and variability of their operational states, providing new solutions for achieving efficient and stable system operation. Despite many researchers applying machine learning algorithms to predict the performance of ASHPs and other types of heat pump units, it is important to note that the black-box nature of these algorithms poses a significant barrier to their development and application (Yang et al. 2022). The black-box nature refers to a model's capability to produce accurate predictions without offering clear explanations or insights into the underlying decision-making process. This lack of transparency makes it challenging to fully trust models, even if they perform exceptionally well when trained and deployed (Ribeiro, Singh & Guestrin 2016). Additionally, a thorough comprehension of how selected features impact final prediction outcomes enables improved model optimization through techniques like feature engineering (Ribeiro et al. 2016). Therefore, the application of ML algorithms in predicting the operational performance of ASHPs should balance model accuracy and interpretability. It should help building operators understand the impact of dynamic operational parameters such as environmental conditions and supply/return water temperatures on ASHPs' performance, facilitating the implementation of optimal control. Yang, et al. 4 The study proposes a comprehensive framework encompassing data pre-processing, model construction, and interpretability analysis, offering a dependable framework for predicting the operational performance and analysing key influencing factors of ASHPs. The performance of the methodology was validated using actual ASHP system from a campus in the cold region of China as the case study, and the key influencing factors affecting the heating performance of the case ASHP units were analysed. METHOD Data preprocessing Data preprocessing plays a crucial role in machine learning, often involving tasks such as feature engineering, and outlier cleaning to improve data quality and model performance (Yang et al. 2022). The proposed framework selects seven features across three dimensions: real-time operational parameters, meteorological parameters, and time indices, as shown in Table 1, as input parameters for the ML algorithm, with the heating capacity of ASHP system as the prediction target. Additionally, the proposed framework identifies and removes outlier data from the original data using the quartile method due to potential occurrences of abnormal data records during the operation of air source heat pump units, such as startup, shutdown, maintenance, or sudden changes in external environmental conditions. Table 1: Input parameters of ML algorithm Dimension Feature Real-time operational parameters Transient Flow Rate Real-time Power Supply Water Temperature Return Water Temperature Meteorological parameters Outdoor Temperature Time indices Weekday Hour Model construction Model selection Tree-based ML models are popular in nonlinear prediction models, particularly for tabular data. These models are often more accurate than deep learning models based on neural networks. Therefore, three typical tree-based ML algorithms, including Random Forest (RF), LightGBM, and XGBoost, are recommended in the proposed framework. RF operates by constructing multiple decision trees and aggregating their predictions, making it effective for both classification and regression tasks. LightGBM and XGBoost are efficient gradient boosting frameworks based on gradient boosting decision tree improvements. LightGBM adopts a histogram-based learning strategy and a Leaf-wise growth method, offering faster training speed and lower memory consumption (Ke et al. 2017). XGBoost, on the other hand, incorporates more regularization control and split point selection strategies, showcasing excellent predictive performance and robustness (Chen & Guestrin 2016). The final ML algorithm to be adopted can be determined based on actual data and hyperparameters optimization results. Hyperparameters tuning In the proposed framework, it is necessary to tune these hyperparameters within a certain range (as shown in Table 2) to find the optimal-performing model. Yang, et al. 5 Table 2: Hyperparameters tuning range Hyperparameters Tuning range Tuning step Number of trees 150-300 10 Maximum depth of trees 1-30 1 Minimum sample size of nodes 2-5 1 Interpretability analysis In the proposed framework, SHAP (SHapley Additive exPlanations) is used for interpretability analysis of ASHP performance prediction models. The emphasis is on identifying critical features that have a significant impact on ASHP performance and evaluating the effects of each feature on ASHP performance across various intervals. SHAP is based on the Shapley value concept from game theory, where weighted averages are computed over permutations of feature values to assess each feature's contribution to the model's predictions (Lundberg et al. 2020). This method treats different combinations of feature values as players in a game, with the model predictions as the game's outcome, and quantifies each feature's contribution to the outcome through Shapley value calculations. The key advantage of the Shapley value lies in its ability to meet the criteria for local accuracy, missingness, and consistency, making it a superior attribution method (Lundberg et al. 2020)(Molnar 2019). SHAP utilizes SHAP values as a standardized metric for feature importance in ML models (Lundberg & Lee 2017). It attributes output values to the Shapley value of each feature, operating under the additive feature attribution assumption. This approach provides a straightforward representation of complex functional relationships within black-box models by attributing features to the model output. CASE STUDY Introduction of the case dataset The ASHP system used in a middle school campus in Beijing, China, which was put into operation in 2022, is selected as the case in this study. The campus has an area of 30,500 m2 and uses the ASHP system for both cooling and heating purposes. The ASHP system consists of 26 modular variable-frequency air-cooled heat pump units, as shown in Fig. 1(a), with the number of units starting and stopping controlled based on the return water temperature. Additionally, the system includes water pumps, a softening constant-pressure supplementary water system, a water treatment system, pressure differential control, electric valves, temperature and pressure monitoring, and other electric components, as shown in Fig. 1(b). In this study, the hour-by-hour heating data for the case system in December 2023 was used to produce the dataset. It should be noted that only data from the case system during stable operation were used for model training. Data during startup, shutdown, and maintenance periods were excluded to avoid interference with model performance from data during special operational stages. Finally, a total of 354 detailed hourly stable system operation data were retained for training of the ML algorithm after outliers were removed. Yang, et al. 6 Fig. 1 (a) modular variable-frequency air-cooled heat pump units; (b) schematic diagram of the case ASHP system Model training and selection During the training phase, 60% of the data were allocated for model training, while an additional 10% were set aside for validation to prevent overfitting. The remaining 30% of the data were kept separate and used solely to assess the performance of the trained model. After training within the tuning range, LightGBM exhibited the best predictive performance among the three tree-based ML algorithms on the testing data. Using input information such as ASHP system operational parameters, outdoor meteorological parameters, and time indices, it achieved an accuracy of 78.24% in predicting the ASHP system's heating capacity for the next hour. Interpretability analysis Global feature importance ranking and local explanation summary The feature importance ranking, combined with the summary plot, effectively illustrates the overall impact, prevalence, and trends of features, along with their local distributions across the dataset. To determine global feature importance, the absolute average of each feature's SHAP values was calculated and sorted in descending order. This approach helps mitigate heterogeneity effects in partial dependency analysis. A scatter plot was utilized to visually present all data points, arranged vertically based on feature importance. Each scatter point's position on the x-axis corresponded to the SHAP value of that feature for each instance, while the color gradient from red to blue indicated the feature's values, providing a clear representation of each instance's value. The presence of long tails on many features indicated significant impacts on specific samples, which may be overlooked in global analysis due to limited sample sizes or instances (Yang et al. 2022). Fig. 2 Feature importance ranking and summary plot For the case ASHP system, as shown in Fig. 2, the transient flow rate, real-time power, and return water temperature had the most significant impact on the heating capacity for the next Yang, et al. 7 hour. Analysing the local explanation summary plot revealed a notable long tail in the transient flow rate, indicating that higher flow rates had a significant positive effect on increasing the heating capacity for the next hour, while lower flow rates had a significant negative effect. Similarly, the long tail in outdoor temperature indicated a strong correlation between lower outdoor temperatures and higher heating capacity for the next hour. The combination of global feature importance ranking and local explanation summary effectively revealed the key features influencing ASHP heating performance. Based on the theoretical foundation of cooperative game theory, these features could be quantitatively assessed for their impact using a unified metric, providing clear insights into their respective influence levels. Feature effects across various intervals As observed in the local explanation summary plot, certain features had varying or even opposing impacts on ASHP heating performance across various intervals. The outdoor temperature and transient flow rate, two features with evident long tails in the local explanation summary plot, exhibited varying impacts on the heating capacity across different intervals, as shown in Fig. 3. The horizontal axis showed the range of the selected feature values, while the vertical axis displayed the corresponding changes in SHAP values. The colour gradient from red to blue in the colour bar represented the change in feature values from large to small. From Fig. 3(a), it could be observed that when the outdoor temperature is below -7.5°C, there was a significant positive effect on increasing the heating capacity of the ASHP system for the next hour. However, when the temperature was above -7.5°C, the impact of outdoor temperature on ASHP heating capacity didn’t show significant differences. This indicated that -7.5°C was a critical threshold for the outdoor temperature's influence on the heating load of the case campus buildings. The effect of outdoor air temperature on the amount of heating capacity of ASHPs reflects the actual combined effect on the heating demand of the case building with the fixed envelope and the heat storage capacity of the case building envelope (Ling et al. 2020). Existing studies have also shown that for buildings with fixed envelope parameters, projecting heating demand based on time-by-time outdoor air temperatures and implementing further optimized control can achieve significant energy savings (Ling et al. 2020)(Zhou et al. 2020), which also proves the significance of the proposed framework for building operation control. From Fig. 3(b), it could be observed that although transient flow rate was the feature with the largest overall impact on the heating capacity for the next hour, its effect was relatively small when the flow rate was between 440 and 490. However, when the flow rate was above 490, there was a significant positive effect on increasing the heating capacity, while below 440, there was a notable negative effect on the heating capacity. Fig. 3 Feature effects across various intervals (a) outdoor temperature; (b) transient flow rate CONCLUSIONS In this study, a framework based on ML algorithms for performance prediction and interpretability analysis of ASHP systems is proposed. The proposed framework comprises Yang, et al. 8 three modules: data preprocessing, model construction, and interpretability analysis. It focuses on predicting the performance of ASHP systems based on real-time operational parameters, meteorological parameters, time indices, and other features, as well as extracting key influencing features and analysing the effects of each feature on system performance across different intervals. The proposed framework was applied to an ASHP system in a secondary school in Beijing, China, achieving an accuracy of 78.24% in predicting its heating capacity for the next hour. The performance interpretability analysis of the ML algorithm was performed using the SHAP method, which is grounded in cooperative game theory. The analysis indicated that the instantaneous flow rate had the most significant effect on the ASHP system's heating capacity, with its impact differing greatly across various flow rate intervals. The proposed framework demonstrates significant potential in predicting the heating capacity of ASHP systems and providing precise analysis, which can greatly assist building maintenance personnel in fully understanding ASHP system performance and achieving optimal control. ACKNOWLEDGEMENTS This study is supported by the China National Key Research and Development Program (Grant No. 2023YFC3306400), the Key Program of National Natural Science Foundation of China (Grant No. 52130803), the International (NSFC-NWO) Joint Research Project of National Natural Science Foundation of China (Grant No. 52161135201), and the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 52208113). REFERENCES Carroll, P., Chesser, M. & Lyons, P., 2020, Air Source Heat Pumps field studies: A systematic literature review, Renewable and Sustainable Energy Reviews. Chen, T. & Guestrin, C., 2016, XGBoost: A scalable tree boosting system, Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining. Chen, Y., Kong, G., Xu, X., Hu, S. & Yang, Q., 2023, ‘Machine-learning-based performance prediction of the energy pile heat pump system’, Journal of Building Engineering. Congedo, P.M., Baglivo, C., D’Agostino, D. & Mazzeo, D., 2023, ‘The impact of climate change on air source heat pumps’, Energy Conversion and Management. Eom, Y.H., Chung, Y., Park, M., Hong, S. Bin & Kim, M.S., 2021, ‘Deep learning-based prediction method on performance change of air source heat pump system under frosting conditions’, Energy. Huang, S., Yu, H., Zhang, M., Qu, H., Wang, L., Zhang, C., Yuan, Y. & Zhang, X., 2023, ‘Advances, challenges and outlooks in frost-free air-source heat pumps: A comprehensive review from materials, components to systems’, Applied Thermal Engineering. Ke, G., Meng, Q., Finley, T., Wang, T., Chen, W., Ma, W., Ye, Q. & Liu, T.Y., 2017, LightGBM: A highly efficient gradient boosting decision tree, Advances in Neural Information Processing Systems. Ling, J., Tong, H., Xing, J. & Zhao, Y., 2020, ‘Simulation and optimization of the operation strategy of ASHP heating system: A case study in Tianjin’, Energy and Buildings. Lundberg, S. & Lee, S.-I., 2017, ‘A Unified Approach to Interpreting Model Predictions’, Advances in Neural Information Processing Systems, 2017-Decem(Section 2), 4766–4775. Lundberg, S.M., Erion, G., Chen, H., Degrave, A., Prutkin, J.M., Nair, B., Katz, R., Himmelfarb, J., Bansal, N. & Lee, S.-I., 2020, ‘From local explanations to global understanding with explainable AI for trees’, Nature Machine Intelligence, 2(January), 56–67. Yang, et al. 9 Molnar, C., 2019, ‘Interpretable Machine Learning. A Guide for Making Black Box Models Explainable.’, Book. Ribeiro, M.T., Singh, S. & Guestrin, C., 2016, ‘Model-Agnostic Interpretability of Machine Learning’, (Whi). Wang, Y., Wang, J. & He, W., 2022, Development of efficient, flexible and affordable heat pumps for supporting heat and power decarbonisation in the UK and beyond: Review and perspectives, Renewable and Sustainable Energy Reviews. Yang, Y., Yuan, Y., Han, Z. & Liu, G., 2022, ‘Interpretability analysis for thermal sensation machine learning models: An exploration based on the SHAP approach’, Indoor Air, 32(2), 1–24. Zhou, C., Ni, L., Wang, J. & Yao, Y., 2020, ‘Investigation on the performance of ASHP heating system using frequency-conversion technique based on a temperature and hydraulic-balance control strategy’, Renewable Energy. Yamusa, et al. (2024) Addressing compliance checking matters of buildings to green standards using natural language processing: a review In: Laryea, S. et al. (Eds) Proceedings of the WABER SuDBE Conference, 30 to 31 July 2024, Johannesburg, South Africa 11-19 11 WABER SuDBE Conference 2024 30 – 31 July 2024 Johannesburg, South Africa ISBN: 978-0-7961-6032-4 ADDRESSING COMPLIANCE CHECKING MATTERS OF BUILDINGS TO GREEN STANDARDS USING NATURAL LANGUAGE PROCESSING: A REVIEW Muhammad Aliyu Yamusa1, Muhammad Abdullahi2, Yahaya Makarfi Ibrahim3, Hassan Adaviriku Ahmadu4 and Mu’awiya Abubakar5 1,2Department of Quantity Surveying & Public Procurement Research Centre, Ahmadu Bello University, Zaria, Nigeria 3,4Department of Quantity Surveying, Ahmadu Bello University, Zaria, Nigeria 5Department of Building & Public Procurement Research Centre, Ahmadu Bello University, Zaria, Nigeria The incorporation of sustainability objectives in green building (GB) projects adds complexity to their design, construction, and management. Current developments in the area of artificial intelligence, precisely natural language processing (NLP) techniques have provided great potential in analysing voluminous regulatory documents to draw insightful information relating to the standards, requirements, and codes to enhance the efficiency and accuracy of compliance checking. However, there is a dearth of attempts to tap the potential of NLP to facilitate automated compliance checking, especially within the context of green buildings. This paper, therefore, aims to assess the benefits and limitations of the current advancements in NLP-based methodologies for automated compliance checking of regulatory documents in green buildings. This paper conducts a systematic review of literature to achieve its aim. The challenges and benefits, as well as the areas of the application of NLP in automated compliance checking of regulatory documents in green buildings, are highlighted. The research offers a guide for future investigations aimed at broadening the utilisation of NLP in automating the compliance verification process for regulatory documents in green buildings and the construction sector as a whole. Keywords: compliance checking, green building, NLP, regulatory documents, standards INTRODUCTION It is necessary to evaluate design alternatives in light of the projects’ objectives and anticipated benefits. Before the design is finalised and approved, an assessment is necessary to identify and expose discrepancies between requirements and design, as well as regulatory constraints (). These cycles of analysis and assessment enhance the quality of design in the context of building design by guaranteeing that the goals of clients and stakeholders are met (Kamara et al., 2000) and that design solutions adhere to regulations as well as legal requirements 1 yamusajf@yahoo.com 2 bnabdallah02@gmail.com 3 makarfi@gmail.com 4 ahmaduhassan@rocketmail.com 5 muawiyaabubakar1@gmail.com Yamusa, et al. 12 (Dimyadi & Amor, 2013). Thus, design assessment offers a chance to enhance value generation and facilitates the removal of flaws (Formoso et al., 2011). The suggestion to utilise automation for design compliance checking has been put forward as a significant approach to navigate through this particular process. Existing literature emphasizes numerous potential advantages that can be derived from this approach (Eastman et al., 2009). Automation enables the connection and coordination of various forms of information within building models (Laakso & Kiviniemi, 2012), thereby facilitating the verification of design compliance in a quicker, more effective, and dependable means (Eastman et al., 2009). Several studies have proposed various approaches to tackle the challenges associated with automated compliance checking (ACC). These challenges include converting rule interpretation and representation into a format that can be understood by computers (Zhang et al., 2023), preparing building design model data for verification (Solihin et al., 2020), and developing automated compliance checking systems using various techniques that include Artificial Intelligence (AI) and Natural Language Processing (NLP) (Kim et al., 2020). Despite these efforts, the practical implementation of automated compliance checking has faced limited success. This is primarily due to the complexities associated with complying with numerous regulatory requirements (Eastman et al., 2009) and the technological limitations that hinder the support of this process (Solihin et al., 2020). Ensuring compliance becomes even more challenging within the context of Green Buildings (GB) design. GBs, together with their sustainable technologies, are regarded as innovative solutions that require various changes at different levels, including process, organization, industry, and policy. These changes bring about fundamental transformations in decision- making stages, design approach, procurement process, actors, tasks, roles, competencies, and team cultures necessary for the successful delivery of GB projects (Qazi et al., 2021). Such transformations demand the implementation of a novel range of technologies for designing, constructing projects, as well as procurement processes, thereby introducing extra tiers of significant unpredictable risks and uncertainties (Hwang et al., 2017). GB projects are required to implement intricate environmental considerations during the standard design phases to ensure the optimal functioning of the building over its entire lifespan. This objective is accomplished by integrating numerous requirements that address the environmental impact of construction projects. These requirements that enable GB projects meet the desired green standards are outlined in the green building regulations. To address these challenges and facilitate the incorporation of these requirements, the implementation of automated checking systems in design were proposed as a crucial approach to manage and enhance quality, as well as addressing the intricacies of designs (Nicholas, 2012). This can effectively mitigate the considerable uncertainties and unpredictable risks associated with GB projects by ensuring conformance to green standards. Makisha & Rybakova (2021) and Rybakova & Makisha (2021) proposed a model for evaluating the conformity of contemporary building design and construction with "green" certification standards. Their study identified the BRE Environmental Assessment Method (BREEAM), Leadership in Energy and Environmental Design (LEED), and Deutsche Gesellschaft für Nachhaltiges Bauen (DGNB) to demonstrate strong compliance checking susceptibility. Recent advances in AI and NLP techniques have provided great potential in analysing voluminous regulatory documents to draw insightful information relating to the standards, requirements, and codes to enhance the efficiency and accuracy of compliance checking. However, there is a dearth of attempts to tap the potential of NLP to facilitate automated compliance checking, especially within the context of green buildings. Therefore, this paper aims to assess the benefits and limitations of the current advancements in NLP-based Yamusa, et al. 13 methodologies for automatically checking the compliance of regulatory documents in green buildings. This will provide response to the research question: what are the benefits and limitations of NLP-based methodologies to automate the compliance checking of regulatory documents in green buildings? The structure of this paper is organised as follows. The second section establishes the methodology employed for the research. Subsequently, the review and findings of this research are presented. Lastly, the paper concludes by offering some final remarks. METHOD This research adopted an exploratory research approach by identifying publications related to Natural Language Processing (NLP) techniques for Compliance Checking of building construction towards green standards. The search queries utilized for this purpose encompass NLP techniques such as 'Artificial Intelligence', 'Machine learning', 'Natural Language Processing', 'NLP', and 'Semantic-NLP'. Additionally, the queries include terms related to building construction such as 'Building', 'Construction', 'Design', 'Architecture Construction and Engineering', and 'AEC industry'. Furthermore, terms related to compliance checking such as 'Compliance Checking', 'Automated compliance checking', 'Regulatory requirements', 'Regulatory taxonomy', and 'Regulatory requirements' were also incorporated. The Scopus database was chosen for the search as it contains relevant publications and has been utilized in similar studies (Yamusa et al., 2023). The inclusion criteria for the publications were limited to those in the English language and falling under the categories of 'Construction Building Technology' and 'Engineering Civil', without any restrictions on the publication year or document type. The final publications were reviewed to identify and consolidate the key findings and lessons learned from these studies, which serve as the foundation for the outcomes of this research. LITERATURE REVIEW Introduction to natural language processing and its application The objective of Natural Language Processing (NLP), a division of Artificial Intelligence (AI), lies in enabling computers to comprehend and analyse speech as well as text in natural language in a way similar to humans (Cherpas 1992). NLP has facilitated the development of various applications, such as automated text summarization and automated natural language translation (Marquez 2000). Tokenization, semantic role labelling, part-of-speech (POS) tagging, (Gildea and Jurafsky 2002), named entity recognition (Roth and Yih 2004), and other NLP subtasks exemplify the techniques employed in NLP. Two primary methods for handling NLP problems exist: the machine learning (ML) and rule based. While the ML-based method utilizes ML algorithms for processing of text (Pradhan et al., 2004), the rule-based technique includes establishing code rules manually (Soysal et al., 2010). The rule-based approach makes use of additional human input in developing the rules. However, if often exhibits superior performance in processing the text (Crowston et al., 2010). In the field of construction, several noteworthy research endeavours have employed NLP techniques. Several studies have developed machine learning-based models for tender classification and spend categorisation (Abdullahi et al., 2024a, 2024b; Yamusa et al., 2024). Application of NLP in Compliance Checking Text analysis using NLP technology NLP is widely utilized for various purposes including information retrieval, incident investigation, and document correlation in the architecture, engineering, and construction Yamusa, et al. 14 (AEC) sector (Fernando Sanchez-Rada et al., 2020). NLP has been applied for the identification and extraction of semi-structured and structured information in documents. This is achieved through the utilization of techniques such as ML approach and rule-based approach (van Dinter et al., 2021). In order to ensure the accurate retrieval of semantic information from text, Altuncan and Tanyer (2018) employed shallow parsing (SP) rules in extracting semantic knowledge in construction contract text. Furthermore, Zhou & El-Gohary (2017) developed an NLP technique based on rule processing that incorporated semantic rules to automatically extract information from construction contract documents. Scholars have also explored the extraction of information using semantic relations and semantic similarity, thereby enhancing the application of semantic rules (Xu and Cai, 2020). NLP integrated with ML is well-suited for documents with high complexities and irregularities and holds great capability for analysing extensive documents. Sinoara et al. (2019) proposed an ML tool for training the semantic connection among corresponding abstracts and patents, enabling the identification of key terms (such as sentences, phrases and words) in patent texts. The field of topic and sentiment analysis from texts is rapidly advancing in the realm of NLP. Its purpose is to capture opinions and perspectives expressed by writers or a wider populace (Balahur et al., 2012). The sentiments found in documents are highly subjective, encompassing emotions, opinions, specifications, sentiments, and beliefs (Montoyo et al., 2012). Implicit emotions, in contrast to explicit ones, are more prone of being hidden within the text (Peng et al., 2020). Within the AEC industry, the trend of digitization has resulted in project documents that reflect the perspectives of managers regarding project attributes and work sections. For example, Marzouk and Enaba (2019) identified corpus related to conditions in construction contracts and mined significant keywords from these contracts. NLP techniques are utilized to develop a comprehensive framework for the analysis of contract conditions, which represent the desires and expectations of project owners (Hassan & Le, 2020). Information extraction Information extraction (IE) is a process that aims to automatically extract structured information from unstructured textual data. This information includes entities and their associated attributes. The main challenge in IE is that computers often struggle to comprehend and process textual data. Fader et al. (2011) considered the lexical and syntactic text characteristics for developing rules for extracting information. Their objective was aimed at extracting web statements to support common-sense knowledge and question answering. Gutierrez et al. (2016) applied error detection IE rules on ontologies for biology for extracting information from documents within the biology domain. In addition to these efforts, researchers have explored various procedures in reducing IE rules development costs. One approach involves using statistical learning algorithms to learn IE rules from natural text (Chambers & Jurafsky, 2011). Another approach involves the design of straightforward interactive environments and coding for developing rules (Valenzuela- Esc´arcega et al., 2015). Furthermore, there have been attempts to integrate current rule NLP applications and programming languages into a unified platform for developing rules (Kluegl et al., 2016). These endeavours aim to streamline the process of creating IE rules and improve its efficiency. Several IE techniques leverage on simple supervised learning algorithms, in conjunction with manually engineered semantic and syntactic characteristics, including the named entity recognition (NER) technique proposed by Zhou and Su (2002) utilizing the hidden Markov algorithm, an NER method introduced by Li et al. (2004) based on support vector machines, and an IE approach developed by Finkel et al. (2005) using conditional random fields. In the field of architectural, engineering, and construction (AEC), Zhang & El-Gohary (2021) have Yamusa, et al. 15 created an IE approach based on deep neural network to extract syntactic and semantic information from regulatory texts. Additionally, Wu & Ma (2024) have designed an NLP-based framework for retrieving requirement-related documents. Rule-based NLP using pattern-matching-based rules Pattern-matching-based rules play a crucial role in a variety of NLP activities, such as text understanding (Goh et al., 2006), POS tagging (Yin and Fan, 2013), and IE (Califf and Mooney, 2003). The core idea behind these rules is to define specific outcomes when a particular sequence pattern of elements is identified. These rules are implemented in diverse ways to suit different purposes and fields. Nonetheless, they all follow the mapping of "from pattern to result" or a common rule format of "if pattern then result". Zhang & El-Gohary (2015) introduced a semantic NLP approach based on the rule approach to automate the processes of information extraction and transformation. Semantic modelling and semantic NLP Semantic models are structured frameworks designed to represent the meanings within a specific domain or topic. Among the various types of semantic models, ontologies are widely utilized. An ontology is a formal and explicit specification of a conceptualization, typically comprising axioms, concept hierarchies, and relationships between concepts. These axioms, in conjunction with concepts and their relationships, serve to describe the semantic interpretation of the conceptualization. Ontologies are valued for their reusability and extensibility, allowing for easy adaptation and expansion. The utilization of semantic models, such as ontologies, can prove advantageous in natural language processing tasks. Research indicates that semantic- based information extraction yields superior performance compared to approaches reliant solely on syntax (Zhang and El-Gohary, 2013). CONCLUSIONS Automated compliance checking continues to be a significant area of interest for researchers in the construction industry due to its crucial role in facilitating the verification of design compliance in a more efficient and dependable manner. The application of artificial intelligence (AI), specifically natural language processing (NLP), in automating compliance checking offers numerous advantages for ACC practices. One domain that can significantly benefit from the potential of NLP to facilitate its automated compliance checking is the green buildings domain. This study therefore explores the potential of NLP for compliance checking and how the green buildings domain can benefit from its application for its compliance checking. The findings from this study show that the utilization of NLP in compliance checking can assist in automatically identifying and extracting organized information from regulatory documents, typically in unstructured textual data format. Furthermore, the findings reveal that NLP is employed in conjunction with other techniques, such as rule-based approaches that rely on pattern matching, semantic modelling based on ontologies, and machine learning (ML) that relies on data trends and patterns from training text data. However, it is observed that the ML- based approach to utilizing NLP, which requires no human input, in ACC has demonstrated lower accuracy in comparison to the rule-based approach. To enhance the accuracy of the ML-based approach, it is crucial to have high-quality and structured data. Additionally, the size of the dataset should be sufficient to prevent overfitting or underfitting of the models. Nevertheless, it is essential to observe that the use of AI in compliance checking cannot replace the expertise of green building professionals. This is because domain knowledge plays a vital role in fitting the model, selecting appropriate Yamusa, et al. 16 predictors, understanding the data, and effectively deploying the models in practice, especially within a complex domain such as green buildings. Moreover, green building professionals should adopt and exploit these techniques rather than perceive them as rivals or dangers. They ought to acknowledge the significance that NLP techniques bring to their field and utilize them as instruments to augment their own proficiency. Additionally, it is crucial to recognize that this research constitutes a crucial analysis centred on the influence of NLP on automated compliance checking practices. Nevertheless, the analysis is restricted by the scope of the utilized publications. Future investigations should employ a systematic review methodology to comprehensively assess the impact of NLP on automated compliance checking practices. 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