Method of producing cement or concrete

Details Method of producing cement or concrete Method of producing cement or concrete

1990-02-28

1991-01-15

Dixon, Jr., William R.

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

106765, 106791, 106792, 423171, 423555, C04B 1100

Patent

active

049850814

ABSTRACT:
A method of producing cement or concrete, comprising the step of adding fly ash to the cement or concrete at the production stage, the fly ash containing lime and reaction products from the reaction occurring between lime and sulphur oxides in connection with the desulphuration of flue gases. To avoid the disadvantageous effects of calcium sulphite and entringite reactions and to increase the used amount of fly ash containing desulphuration waste, the calcium sulphite is oxidized by hydrogen peroxide either before the production of cement or concrete or during the production.

REFERENCES:
patent: 4495162 (1985-01-01), Jons et al.
patent: 4544542 (1985-10-01), Angevine et al.
Ceramic Bulletin, vol. 59, No. 8 (1980), "Effect of Lime on the Hydration of Supersulfated Slag Cement", Kondo et al., pp. 848-851.
Silicates Industriels, 1982-2, "Supersulfated Cement: Improved Properties", Bijen et al., pp. 45-53.
Silicates Industriels, 1982-7/8, "Characterization of Supersulphate Cement Hardened under Various Curing", Tashiro et al., pp. 173-181.
Abstract 92:115345h "Hydration of Supersulfated Slag Cement", 58--Cement and Concrete Products, vol. 92, 1980.
The Chemistry of Cements, vol. 2, 1964, Chapter 15, "Expanding and Stressing Cements", P. E. Halstead.
Dialog Abstracts--JP 76126163 (no date provided) Fujikk.

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