| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cement-based waterproofing agent of a type to be applied onto cement mortar or concrete after worked, excellent in waterproofing performance and applicability, and capable of affording a hardened form of excellent initial physical properties, and to provide a method for applying the agent. SOLUTION: This cement-based waterproofing agent is obtained by compounding 1-30 pts.wt. on a solid basis, of a copolymer substantially made from vinyl acetate, vinyl versatate and a 6-18C carboxylic acid vinyl ester in 100 pts.wt. of a composition which is prepared by compounding 100 pts.wt. of inorganic cement with 5-50 pts.wt. of a siliciferous material and 0.1-5 pts.wt. of an admixture. The other objective method for applying the above agent comprises the following procedure: 100 pts.wt. of the above waterproofing agent is incorporated with 30-60 pts.wt. of water followed by kneading, and the resulting kneaded product is applied at >=0.5 kg per m2 of a target surface. Being excellent in initial adhesion and waterproofing ability and giving a hardened form affording long-term waterproofness, this waterproofing agent can suppress the deterioration of civil engineering constructs, enabling the quality of such constructs to be stably maintained over a long period. |
