Fast-setting cements from superphosphoric acid
AssigneeStauffer Chemical Company
InventorsFawzy G. Sherif, Antoinette G. Ciamei
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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.
Claims8
A process for preparing a dry fast-setting magnesium phosphate cementitious composition capable of setting to a hardened mass at ambient temperatures following the addition of water thereto comprising adding unfiltered superphosphoric acid to a mixture of a magnesium-containing compound and an aggregate with cooling to form a dry powder, said dry powder being maintained at room temperature or below during the addition of the acid.
Dependencies are inferred from the claim text.