| 摘要 |
PROBLEM TO BE SOLVED: To provide an alkoxysilane derivative that reduces drying shrinkage, improves durability of a hardened cement body, and prevents deterioration over a long period of time by modifying the surface state of the hardened cement body and preventing the entry and deviation of moisture.SOLUTION: The alkoxysilane derivative is obtained by the reaction of (A) an alkoxysilane, a hydrolyzate thereof, or a polycondensation product thereof and (B) at least one compound represented by the following general formula (1) RO-(AO)-H, wherein the ratio of the compound with n of 1 or less and the ratio of the compound with n of 10 or more are each 5 mass% or less based on the mass of the entire compound. In formula, R is a 1-18 alkyl group, AO is a 2-4 oxyalkylene group, and n is an integer of 0-20. |
