Method of producing cement or concrete

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

C - Chemistry, Metallurgy

04

B

261/64

C04B 7/26 (2006.01) B01D 53/50 (2006.01) C04B 18/06 (2006.01) C04B 18/08 (2006.01)

Patent

CA 2011514

Abstract A method of producing cement or concrete, com- prising 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 desulphur- ation waste, the calcium sulphite is oxidized by hydrogen peroxide either before the produc- tion of cement or concrete or during the production.

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