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Table 1 Chemical compositions of raw materials (wt%).

From: Effect of Silica Fume on the Volume Expansion of Metakaolin-Based Geopolymer Considering the Silicon-to-Aluminum Molar Ratio

Constituent Metakaolin Silica fume
SiO2 50.37 97.30
Al2O3 43.33 0.06
CaO 0.45 0.09
Fe2O3 2.82 0.19
TiO2 2.29
MgO 0.15 0.42
SO3 0.05 0.9