| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic composition for steam- and/or autoclave-curing from which a molded matter excellent in freeze damage resistance and a mechanical property can be obtained and which has good workability and to provide the molded matter using it inexpensively. SOLUTION: The hydraulic composition for steam- and/or autoclave-curing comprises a hydraulic material (A) and a polyvinyl alcohol-based resin powder (B) whose elution rate to water at 40°C is 5 mass% or less, which passes opening of 0.6 mm at a JIS standard sieve and whose loose and apparent specific gravity is 0.35 g/mL or less and whose content in total solids is 0.1-20 mass%. A polyvinyl alcohol-based resin having a saponification degree of 98 mol% or more and a mean polymerization degree of 1,000 or higher is produced by a kneader saponification method. The hydraulic composition and the molded matter produced by using it are provided. COPYRIGHT: (C)2006,JPO&NCIPI
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