According to the 50 ： 54 ： 4 ： 5 weight ratio of metakaolin, sodium silicate, sodium hydroxide and filler, we prepared fire resistant geopolymers at room temperature by mixing and maintaining. By changing the calcination temperature on kaolin, five geopolymer samples were obtained. Through researches on their fire, acid and alkali resistances, an optimized sample was obtained from the metakaolin calcined at 900℃ for 2 h. Rheological measurement shows that the viscosities of the samples increase with time while decreasing with temperature ri...
