Fig. 8From: Effect of Silica Fume on the Volume Expansion of Metakaolin-Based Geopolymer Considering the Silicon-to-Aluminum Molar RatioSEM images and EDS results of silica fume in the geopolymer specimens: a and b are the S/A 1.4 with 15% silica fume; and c and d are the S/A 1.8 with 15% silica fume.Back to article page