Pozzolan cement compositions

Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...

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106 90, 106 97, 106 98, 106DIG1, C04B 702

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active

042565006

ABSTRACT:
A cement composition comprising cement, a pozzolan material, fine aggregate, air, water, at least one alkali metal constituent selected from the group consisting of sodium, potassium, and lithium ions, and at least one anionic constituent which is capable of forming complexes with ferric ions, is soluble in water, and forms a calcium salt which is also water soluble, wherein the alkali metal constituent is present in an amount up to approximately 4.0 percent by weight, in terms of the equivalent weight of sodium ions, of the pozzolan material; the anionic constituent is present in an amount up to approximately 6.0 percent by weight, in terms of the equivalent weight of chloride ions, of the pozzolan material; and the cement composition is further characterized by: (a) having a solid volume ratio of cement to the pozzolan material within the range of approximately 0.05 to 2.0; (b) having a ratio of the volume of paste (fly ash, cement, air, and water) to the solid volume of sand within the range of approximately 0.75 to 2.5; and (c) having a ratio of the solid volume of cement to the volume of mortar less than about 0.19. The cement composition of the present invention is substantially less expensive than cement compositions presently employed in the industry having equivalent compressive strengths.

REFERENCES:
patent: 2752261 (1956-06-01), Dournaud
patent: 2785988 (1957-03-01), Lipkind et al.
patent: 3663287 (1972-05-01), Mizunuma et al.
patent: 3765920 (1973-10-01), Humphrey
patent: 3827895 (1974-08-01), Copeland
patent: 3832196 (1974-08-01), Broussard
patent: 3854968 (1974-12-01), Minnick et al.
patent: 3870535 (1975-03-01), Minnick et al.

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