Approaches to mix design and measurement of workability for self-compacting concrete.
Date
2007-02-28T12:42:00Z
Authors
Jooste, Josef Petrus
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Abstract
Self-compacting concrete (SCC) is becoming a popular form of concrete usage in
a range of applications throughout the world. This investigation considers the
development of the technology and use of SCC. Importantly, the investigation
aims to highlight the opportunities for using SCC in South Africa. A mixture
design model is proposed and has been found to work well using local materials.
The advantage of this model is the simplicity and the adaptability to any aggregate
type. This method should be more acceptable to SCC producers who do not have
special facilities and testing equipment
An overview concerning concrete rheology is included to explain the mechanisms
used to describe the flow and deformation of both the concrete and mortar
mixtures. Included is a comparison between concrete, mortar and paste rheology.
The Tattersall Two Point Tester was used to measure the shear resistance at two
shear deformation rates.
From the test results it was found that SCC can be made using South African
materials and that it is possible to design a mixture with a lower cementitious
content. The results from the Tattersall Two Point Tester gave additional
information about the flowability of SCC.
Description
Student Number : 0218148W -
MSc Dissertation -
School of Civil Engineering -
Faculty of Engineering and the Built Environment
Keywords
mix design, self-compacting concrete, rheology, workability