| 摘要 |
PROBLEM TO BE SOLVED: To obtain the waterproofing material good in handleability, with the jobsite operation simplified, without being set at a factory, etc., surely exhibiting waterproofness and with the specified strength developing time shortened and the applicability enhanced by mixing the calcium silicate cement, reemulsifiable powder resin and amorphous silica as the main components in a specified ratio. SOLUTION: This material consists essentially of 100 pts.wt. of calcium silicate cement (e.g. portland cement), 60-1000 pts.wt. of reemulsifiable powder resin (e.g. ethylene-vinyl acetate copolymer resin) and 0.6-100 pts.wt. of amorphous silica. For example, the amorphous silica is dispersed in water and mixed with the emulsion of the reemulsifiable resin, and the mixture is spray-dried to deposit amorphous silica on the powder resin surface. A silica-base filler aggregate is further used by <=500 pts.wt., as required. |
