Preparation of activators for fast-setting cements
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United States of America Patent
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Feb 21, 1989
Grant Date -
N/A
app pub date -
Oct 15, 1985
filing date -
Oct 15, 1985
priority date (Note) -
Expired
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Abstract
A particulate solid activator comprising a porous material containing absorbed P.sub.2 O.sub.5 values can be prepared by a process which comprises spray drying a slurry of a liquid P.sub.2 O.sub.5 material and the porous material to obtain the particulate solid. The P.sub.2 O.sub.5 material can be a mixture of a phosphoric acid and an ammonium phosphate solution. The porous material can be diatomaceous earth. The resulting particulate solid activator can be dry blended with a magnesium-containing compound, e.g. MgO, and an optional aggregate to form a magnesium phosphate fast-setting cement mixture. This mixture reacts in the presence of an aqueous component at ambient temperature to form a monolithic solid.
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