Corrosion inhibiting hydraulic cement additives and compositions

Details Corrosion inhibiting hydraulic cement additives and compositions Corrosion inhibiting hydraulic cement additives and compositions

1989-09-07

1990-08-07

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106725, 106802, 106809, 524 4, 524 5, 524401, C04B 2432

Patent

active

049465066

ABSTRACT:
An additive combination for hydraulic cement compositions is provided which advantageously provides corrosion inhibition and set acceleration, in combination with a high level of fluidity and retention of fluidity over a desired period of time. The cement additive combination comprises an alkali or alkaline earth metal nitrite and a graft copolymer plasticizer comprising a polyether backbone and side chain polymers formed by polymerization of ethylenically unsaturated monomers.
Fluid hydraulic cement compositions are further provided comprising these additive combinations.

REFERENCES:
patent: 3427175 (1969-02-01), Angstadt et al.
patent: 4092109 (1978-05-01), Rosenberg et al.
patent: 4229224 (1980-10-01), Dawson et al.
patent: 4285733 (1981-08-01), Rosenberg et al.
patent: 4318774 (1982-03-01), Dodson
patent: 4466834 (1984-08-01), Dodson et al.
patent: 4676317 (1987-06-01), Fry et al.
patent: 4814014 (1989-03-01), Arafaei

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