The effect of the
amorphous silica derived from biomass rice husk (RH) in the alkaline activating
solution on the properties was investigated in geopolymerization process, when
metakaolin was used as the aluminum source from metakaolin (MK). With changing a
molar ratio of SiO2/Al2O3 = 3.0 and 10, the
curing in the preparation of geopolymers was carried out at 85°C, 100°C and 200°C.
Viscoelastic properties of the geopolymer pastes including SiO2 and
Al2O3 components suggested that the alkaline activation
was found in higher RH silica source. The mineralogical and microstructural
characteristics of the cured products were evaluated to be amorphous
aluminosilicate.
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