Title: The Influence of Material Properties on the Rheology of Mortar and Concrete

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Publication: CIA

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Date: 2/13/2011

Abstract:
Following the wide spread acceptance of self compacting (self-levelling) concrete as an attractive proposition for concrete manufacture, there has been a greater focus on the development of the rheological properties of a wider range of concrete mixes. The same savings in manufacture, placement and finishing of concrete can be gained from improving the plastic behaviour of concrete. This paper outlines the results of a test program studying the linkages between material properties and the rheology of mortars and concrete. A series of mixes involving cements with different particle size distributions, and selected fine fillers were studied for their plastic behaviour. The properties of plastic viscosity and yield value were determined using a commercial rheometer. The flow-curves of these test parameters are then interpreted and, through knowledge of the behaviour of various additives and ingredients, and optimal solution can be derived for application in self compacting mixes.