ABSTRACT

This chapter is devoted to information available on low-end pozzolans, such as fly ash and GGBS, along with a much simpler powder material, limestone powder. To arrive at the broad outlines of the compositions possible from the reported literature, the strengths, the water content, and powder content adopted for achieving self-compacting concrete (SCCs) through fly ash are looked at. At this stage, the distribution of the various constituents for the available SCCs in the literature at different percentages was reassessed individually to study the efficacy of the efficiency concept. The results are presented in a graphical format to show that the proposed efficiency concept predicts the strength behavior of these concretes accurately. The results were also compared with a limited set of laboratory data available. A similar approach was followed to study the results compiled for the remaining two pozzolanic admixtures, GGBS and LSP also. It can be seen that the proposed methodology was able to reasonably predict the compositions required for self-consolidating concretes. Finally, to assist the user community, nomograms utilizing this methodology to arrive at SCCs at the different percentages using these materials have been presented. The resulting concretes, in general, will show a higher performance only if the expected limitations of the use of the cementitious materials and water content are appropriately understood.