Cementitious compositions

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C - Chemistry, Metallurgy

04

B

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C04B 7/00 (2006.01) C04B 22/00 (2006.01) C04B 22/06 (2006.01) C04B 22/14 (2006.01) C04B 24/12 (2006.01) C04B 28/02 (2006.01)

Patent

CA 1098135

ABSTRACT OF THE DISCLOSURE A method for preventing shrinkage of alkaline aqueous hydraulic cementitious mixtures during setting and hardening which comprises incorporating in the mixtures a monopersulfate salt, or a monopersulfate salt together with at least one peroxygen compound other than the monopersulfate salt; and hydraulic cement compositions for preparing such alkaline aqueous hydraulic cementitious mixtures. The monopersulfate salt, or monopersulfate salt together with at least one per- oxygen compound other than monopersulfate salt, generates sufficient oxygen gas during setting and hardening of the alkaline aqueous hydraulic cementitious mixture to provide controlled expansion of the mixture.

302487

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