| 摘要 |
<p>A cement dispersant (especially a dispersant for concretes with ultrahigh performance) comprising as the main component a water-soluble amphoteric copolymer obtained by copolymerizing (A) a polyamide-polyamine or 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 ultrahigh-performance concrete) containing the dispersant. The dispersant satisfies all of a water-reducing effect, slump flow retention, strength development, etc.</p> |
