CEMENT DISPERSING AGENT

摘要

[PROBLEMS] To provide a cement dispersing agent and a concrete admixture which little cause setting retardation, have good influence on workability (such as concrete consistency reduction), and are excellent in slump-loss reduction. [MEANS FOR SOLVING PROBLEMS] A cement dispersing agent characterized by containing an alkylene oxide modified water -soluble polymer having a structure composed of both a polymer skeleton consisting of a water-soluble polycarboxylic acid polymer grafted and/or crosslinked with a compound having amino and inimo groups and/or a compound having amino, imino and amido groups and a polyalkylene oxide moiety bonded to the skeleton which moiety is formed by the addition reaction of an alkylene oxide; and concrete admixtures containing the cement dispersing agent and other admixtures.