| 摘要 |
PROBLEM TO BE SOLVED: To obtain room-temperature-curing mortar or concrete composition which essentially comprises a calcareous raw material and a siliceous raw material and yields a cured product whose water-repellency is peculiarly improved and whose strength does not deteriorate, by adding a silicone oil having a specific alkyl group, a specific range of polymerization degree and, preferably, a specific alkoxy group in a specific amount based on the calcareous raw material. SOLUTION: The room-temperature-curing mortar or concrete composition is obtained by adding, based on the calcareous raw material, 0.3-2.5 mass% silicone oil of formula (1) (wherein R and R' are each an alkyl group; y is an integer which makes the number of R correspond to 5-50 mol% of the total number of substituents directly bonded to Si atoms within a molecule; z is 0-5; and 3≤x+y+z≤30) to the mortar or concrete composition essentially comprising the calcareous raw material and the siliceous raw material. COPYRIGHT: (C)2005,JPO&NCIPI |
