Cementitious gypsum-containing binders and compositions and materials made therefrom
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United States of America Patent
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Jan 12, 1999
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N/A
app pub date -
May 19, 1997
filing date -
Jun 3, 1994
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Abstract
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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