Hydration modifying agent for mortar or concrete with limited shrinkage
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United States of America Patent
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-
Aug 20, 2002
Grant Date -
N/A
app pub date -
Jun 26, 2000
filing date -
Nov 17, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns a hydration modifying agent for mortar and concrete comprising a combination of 30 to 80% of calcium sulphate, 3 to 60% of ethylene/propylene oxide copolymer and 0.5 to 6% of an activator for the copolymer. The invention also concerns a Portland dry cement comprising 2 to 10 wt. % of said hydration modifying agent and a method for preparing such a mortar or concrete composition, and a self-spreading concrete topping made from said mortar or concrete composition.
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