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Browsing Civil Engineering by Author "Ballim, Y."

Now showing items 1-7 of 7

Early-age Thermal Characteristics of Clinker Cements in Relation to Microstructure and Composition: Implications for Temperature Development in Large Concrete Elements

Ballim, Y.; Graham, P.C. (2004)

This paper presents an assessment of the heat response of nominally similar cement clinkers from a range of cement production facilities in South Africa. Clinker samples were collected at nine cement plants and cements ...
Effectiveness of the fi neness of two South African Portland cements for controllingearly-age temperaturedevelopment in concrete

Graham, P.C.; Ballim, Y.; Kazirukanyo, J. (2011-04-01)

In developing an assessment of the quantum and rate of heat evolution from hydrating cement, an important controllable variable is the fineness of grinding of the cement. This paper presents the results of a project in ...
A maturity approach to the rate of heat evolution in concreate

Ballim, Y.; Graham, P.C. (2003-06-03)
A Maturity Approach to the Rate of Heat Evolution in Concrete

Ballim, Y.; Graham, P.C. (2003-06-03)

This paper discusses the use of the concept of maturity as a means of combining the effects of time and temperature in describing the rate of heat evolution from hydrating cement in concrete. The proposed maturity approach ...
Modelling the cooling of concreate by piped water

Myers, T.G.; Fowkes, N.D.; Ballim, Y. (2009-03-25)

Piped water is used to remove hydration heat from concrete blocks during construction. In this paper we develop an approximate model for this process. The problem reduces to solving a one-dimensional heat equation in the ...
Modelling the cooling of concrete by piped water

Myers, T.G.; Fowkes, N.D.; Ballim, Y. (2009-03-25)

The chemical reaction can lead to temperature rises in excess of 50 K and it can take a number of years before the concrete cools to the ambient temperature. Prior to construction of the Hoover dam engineers at the U.S. ...
Reflections on future needs in concrete durability research and development

Ballim, Y.; Alexander, M.G.; Beushausen, H.D; Moyo, P. (2012-02-03)

There is no doubt that, over the past two decades, we have made enormous advances in the understanding and practice of concrete durability. Spurred by the often experienced early deterioration of reinforced concrete ...

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