| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete admixture capable of suppressing the darkish image produced on the skin surface of concrete. SOLUTION: The concrete admixture contains a structural unit composed of an olefin-maleic acid copolymer (1) having 6-14C bivalent hydrocarbon group and a weight average molecular weight of 1,000-20,000 and a polycarboxylic acid-based polymer (2) except (1). COPYRIGHT: (C)2004,JPO |
