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The Scientific World Journal
Volume 2014 (2014), Article ID 986567, 11 pages
http://dx.doi.org/10.1155/2014/986567
Review Article

Effects of Different Mineral Admixtures on the Properties of Fresh Concrete

Civil Engineering Department, Universiti Teknologi PETRONAS, Block 13, Level III, 31750 Tronoh, Perak, Malaysia

Received 30 August 2013; Accepted 19 November 2013; Published 18 February 2014

Academic Editors: O. S. B. Al-Amoudi and K. Z. Elwakeel

Copyright © 2014 Sadaqat Ullah Khan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a review of the properties of fresh concrete including workability, heat of hydration, setting time, bleeding, and reactivity by using mineral admixtures fly ash (FA), silica fume (SF), ground granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Comparison of normal and high-strength concrete in which cement has been partially supplemented by mineral admixture has been considered. It has been concluded that mineral admixtures may be categorized into two groups: chemically active mineral admixtures and microfiller mineral admixtures. Chemically active mineral admixtures decrease workability and setting time of concrete but increase the heat of hydration and reactivity. On the other hand, microfiller mineral admixtures increase workability and setting time of concrete but decrease the heat of hydration and reactivity. In general, small particle size and higher specific surface area of mineral admixture are favourable to produce highly dense and impermeable concrete; however, they cause low workability and demand more water which may be offset by adding effective superplasticizer.