Method for controlling contraction in setting cementitious systems
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United States of America Patent
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-
Mar 31, 1987
Grant Date -
N/A
app pub date -
Oct 12, 1983
filing date -
Oct 12, 1983
priority date (Note) -
Expired
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Abstract
The contractions of aqueous hydraulic cement mixtures in the plastic state 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 while in the plastic state during setting or hardening without the generation of ammonia fumes.
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