This indicates that the rate determining step is likely enhancement in the rate of geopolymerization and, therefore,
a consequent increase in the compressive strength. However, when, the W/C ratio increases from 0.27 to 0.33, the
porosity of cement matrix increases and, then the compressive strength decreases. The optimum W/C ratio required for the
GBFS-NC14 paste is 0.27.