| 摘要 |
PROBLEM TO BE SOLVED: To provide a form releasing agent which is used suitably for concrete incorporated with an admixture prepared by combining two water-soluble low-molecular compounds and a conrete placing method which can maintain the properties of the concrete. SOLUTION: When a concrete composition is incorporated with the admixture in which a first water-soluble low-molecular compound (A) selected from cationic surfactants and a second water-soluble low-molecular compound (B) selected from anionic aromatic compounds are combined, as a form releasing agent, a releasing agent which contains any of a fatty acid, a vegetable oil, a synthetic resin, or a surfactant as a main component and does not adsorb the first water-soluble low-molecular compound (A) is used. COPYRIGHT: (C)2006,JPO&NCIPI
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