Cement dispersant and concrete composition containing the dispersant
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United States of America Patent
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Jan 20, 2004
Grant Date -
N/A
app pub date -
Jun 20, 2001
filing date -
Dec 25, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cement dispersant (especially a dispersant for concretes with ultrahigh performance) comprising as a main component a water-soluble amphoteric copolymer obtained by copolymerizing (A) a polyamide-polyamine of an alkylene oxide adduct thereof with (B) (meth)acrylic acid or an alkali metal, ammonium, or alkanolamine salt thereof and (C) a polyalkylene glycol ester of (meth)acrylic acid in an A/B/C ratio of (10-40)/(10-40)/(50-80) (wt. %); and a concrete composition (especially an ultral high-performance concrete) containing the dispersant. The dispersant satisfies all of a water-reducing effect, slump flow retention, strength development, etc.
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