发明授权
US5858083A Cementitious gypsum-containing binders and compositions and materials made therefrom 失效
含水泥石膏的粘合剂和由其制成的组合物和材料

Cementitious gypsum-containing binders and compositions and materials
made therefrom
摘要:
Cementitious binders include calcium sulfate beta-hemihydrate, a cement component comprising Portland cement, and either silica fume or rice-husk ash. The silica fume or rice-husk ash component is at least about 92 wt % amorphous silica and has an alumina content of about 0.6 wt % or less.
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