Inventors:
Miklos Szalavitz - Warwick NY
Assignee:
Sterling Drug Inc. - New York NY
International Classification:
C04B 702
Abstract:
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 peroxygen 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.