| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide cast-in-place water-permeable concrete good in workability and short in curing term even in the case of executing a work in a low temperature atmosphere (air temperature about 2-10 deg.C). SOLUTION: The cast-in-place water-permeable concrete is a composition for kneading and laying material consisting of coarse aggregate and past or mortar of 30-80% pts.vol. to the coarse aggregate. The paste or the mortar contains cement or powder mixture containing cement of 100 pts.wt., fine aggregate of 0-150 pts.wt., water reducing agent of 0.1-2.0 pts.wt., and water of 15-30 pts.wt. The water reducing agent is produced by adding reductive inorganic compound and reductive organic compound to liquid, the main ingredient of which is polycarboxylic acid base high molecular compound having polyalkylene glycol chain. Thereby, the cast-in-place water-permeable concrete is obtained by drying and pulverizing them.</p> |
