C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/47
C04B 38/10 (2006.01) C04B 24/12 (2006.01) C04B 28/02 (2006.01)
Patent
CA 1230133
ABSTRACT IMPROVED METHOD FOR CONTROLLING CONTRACTION IN SETTING CEMENTITIOUS SYSTEMS The contractions of aqueous hydraulic cement mixtures is controlled by the addition of a gas generating agent capable of generating gas in the mixture without the addition of activators or other agents, and which does not generate disagreeable or noxious ammonia fumes. The gas generation may be controlled over an extended period of time so that even slow setting cementitious mixtures may have their shrinkage or contraction inhibited during setting or hardening without the generation of ammonia fumes.
465197
Construction Products Research Inc.
Osler Hoskin & Harcourt Llp
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