Method of making a hydraulic binder settable upon combination with water
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United States of America Patent
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Dec 28, 1993
Grant Date -
N/A
app pub date -
Jun 23, 1989
filing date -
Jun 24, 1988
priority date (Note) -
Expired
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Abstract
Calcium sulfate alpha hemihydrate and foundry sand are milled to cement fineness and form a hydraulic binder, as a mixture with both high early setting strength and excellent water resistance. The composition relies upon a sulfate activation of the foundry sand rather than an alkali activation thereof.
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