High-early-strength phosphate grouting system for use in anchori

Details High-early-strength phosphate grouting system for use in anchori High-early-strength phosphate grouting system for use in anchori

1978-07-25

1979-11-13

Poer, James

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

C04B 1900

Patent

active

041742273

ABSTRACT:
A grouting system for anchoring a reinforcing member in a hole at a pull strength level of at least about 175 kg/cm anchoring length within a hour, and usually within 5-10 minutes, includes a hardenable inorganic grouting composition containing an acidic oxy phosphorus compound, e.g., H.sub.3 PO.sub.4 or Al(H.sub.2 PO.sub.4).sub.3 ; a basic Group II or III metal compound capable of reacting with the oxy phosphorus compound in the presence of water to form a monolithic solid, e.g., magnesium oxide; water; and aggregate, e.g., sand. The basic compound preferably is combined with a liquid, e.g., a hydrocarbon, which is substantially nonreactive therewith to form a slush, and the slush is kept separate from an aqueous solution or mixture of the oxy phosphorus compound until use. Control of the surface area and content of the basic metal compound, the water content, and the aggregate content, as well as the ability of preferred trivalent salts of phosphoric acid to form a cross-linked polymeric network, are believed to contribute to the rapid attainment of high pull strength.

REFERENCES:
patent: 2852401 (1958-09-01), Hansen et al.
patent: 3179526 (1965-04-01), Dolph
patent: 3285758 (1966-11-01), Limes et al.
patent: 4066467 (1978-01-01), Rechter

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