Effect of Addition of GGBS and Glass Powder on the Properties of Geopolymer Concrete

The present experimental study aims to develop the geopolymer concrete under ambient curing. The replacement of 15%, 20% and 25% fly ash with ground granulated blast furnace slag (GGBS) and the addition of 5%, 10% and 15% of glass powder have been done and cured under ambient curing. The incorporation of GGBS and glass powder has been done to enhance the reactivity of geopolymer matrix. In addition to this, the study aims at gauging the effect of different molar concentration, i.e., 4 M, 8 M and 12 M on the mixes prepared and in turn deciding the optimum molar concentration for preparation of the mixes. It has been found that the control mix containing only fly ash has developed lesser strength as compared to all the other blended mixes. It is also observed that samples S25-G5-M4 (highest percentage of GGBS) developed the highest strength. The SEM-EDS test results also show that the formation of a dense network of geopolymerization product in the microstructure is the possible reason for the higher strength of S25-G5-M4 as compared to the other mixes.