| abstract |
An object of the present invention is to provide excellent low drying shrinkage without lowering air entrainment and freeze-thaw resistance not only under low temperature conditions but also under relatively high temperature conditions such as summertime. To provide a cement formulation having A cement compound containing a shrinkage reducing agent, an air entraining admixture and cement, wherein the shrinkage reducing agent has the following general formula (1): RO (AO) n H (1) (In the formula, R represents an alkyl group having 4 carbon atoms, AO represents an oxyalkylene group having 2 or 3 carbon atoms, and n represents a number of 1 to 20.) And the surface tension at 25 ° C. of a cement paste supernatant obtained by mixing 2 parts by mass of the shrinkage reducing agent, 100 parts by mass of ordinary Portland cement and 55 parts by mass of water has a surface tension of 35 to 40 mN. / M, which is a shrinkage reducing agent. [Selection diagram] None |