Fast-setting cements from superphosphoric acid
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United States of America Patent
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Mar 29, 1988
Grant Date -
N/A
app pub date -
May 15, 1986
filing date -
May 15, 1986
priority date (Note) -
Expired
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Abstract
Process for preparing dry fast-setting, magnesium phosphate cementitious composition capable of setting to a hardened mass at ambient temperatures following the addition of water thereto is disclosed. In this process unfiltered superphosphoric acid is added to a mixture of a magnesium-containing compound, e.g. MgO, and an aggregate, e.g. silica, with cooling to form a dry powder. This dry powder can be stored without caking, and forms a fast-setting cement having commercially acceptable compressive strength in the presence of water.
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