2022 Volume 76 Issue 1 Pages 115-122
Strength development at 10, 20, and 30℃ was evaluated and hydration reaction analysis was performed using three GGBS with basicities ranging from 1.63 to 1.90. The hydration reaction analysis was performed by XRD/Rietveld method, chemical composition analysis of C-S-H by SEM-EDS, and pore size distribution by MIP. Hydration reaction analysis was performed by XRD/Rietveld method to determine the hydrate phase, SEM-EDS to analyze C-S-H chemical composition, and MIP to determine pore size distribution. It was found that the strength development of the low basicity GGBS improved with increasing temperature and longer age of the material, and that the strength development of the low basicity GGBS was more temperature-dependent than that of the high basicity GGBS. The low basicity GGBS had a higher proportion of C-S-H in the total hydrates, and it was inferred that the contribution of C-S-H formation to the strength enhancement for the low basicity GGBS cement was significant.
