Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1980-11-05
1982-05-11
Poer, James
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 98, 106104, C04B 702
Patent
active
043291791
ABSTRACT:
A method for encapsulating an arsenic-contaminated waste material, e.g. spent guard bed material, in a concrete formed by mixing the waste material with a tricalcium aluminate-free hydraulic cement, e.g. aluminous cement, and water. The resulting mixture is allowed to harden producing a concrete product which is highly sulfate and acid resistant. By being sulfate resistant, ettringite is not formed even after prolonged periods of exposure thereby insuring the structural integrity of the concrete product which allows it to be used as a permanent landfill material without risk of the arsenic being leached therefrom by contacting water. Aggregate, e.g. sand and/or silica flour may be added, and the mixture can be agitated and/or exposed to steam during curing to substantially increase the density of the final product. In instance of prolonged curing times, an accelerator chemical is added to the mixture to speed curing.
REFERENCES:
patent: 254530 (1982-03-01), Budlong
patent: 954692 (1910-04-01), Phillips
patent: 1875897 (1932-09-01), Stalhane et al.
patent: 1988821 (1935-01-01), Werner et al.
patent: 2028420 (1936-01-01), Stalhane
patent: 3947283 (1976-03-01), Uchikawa et al.
patent: 3980558 (1976-09-01), Thompson
patent: 4051022 (1977-09-01), Myers et al.
patent: 4124405 (1978-11-01), Quienot
patent: 4132558 (1979-01-01), Uchikawa et al.
patent: 4142912 (1979-03-01), Young
Taylor, The Chemistry of Concretes, Academic Press, New York, N.Y.; 1964, vol. 1, pp. 9-24, vol. 2, pp. 24-27.
Lea and Desch, The Chemistry of Cement and Concrete, Ed., Arnold (Pubs.) Ltd., London, 1956, pp. 454-459.
Atlantic Richfield Company
Faulconer Drude
Poer James
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