Method for rapid hydration of cement and improved concrete

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

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106672, 106737, 106738, 106745, 106817, 264DIG43, 4289033, 501155, C04B 700

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active

053285085

ABSTRACT:
A method is described for making concrete from an initially dry mixture including Portland cement, a fine aggregate, and a coarse aggregate. The method is effective for curing mixtures which contain rubble, as well as for mixtures which contain primarily virgin aggregate. In the method, substantially dry steam is introduced to the mixture at elevated temperature and pressure. Air injection may be utilized to further increase the pressure. An improved concrete is also described. The concrete exhibits unexpectedly high compressive strength.

REFERENCES:
patent: 3963506 (1976-06-01), Shutt et al.
Design and Control of Concrete Mixtures, (Twelfth edition) Portland Cement Association, ISNBNO-89312-023-5, at p. 11 (1979).
Sidney Mindness and J. Francis Young, Concrete, 24, 78, 99 (1981).
A. M. Neville and J. J. Brooks, Concrete Technology, 177-190 (1987).
D. F. Orchard Concrete Technology, 276-293 (1962).
T. D. Lin and Nan Su, Lunar Concrete Update, Concrete International 73-76 (Nov. 1991).
News item quoting T. D. Lin, Concrete International (Jan. 1993).

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