| 摘要 |
<p>PURPOSE:To provide the title compsn. having good workability without sacrificing the strength and durability of a completed floor by incorporating Portland cement, pozzolan, ZrO2 and/or MgO, alkaline (earth) metal salt of stearic acid, water-reducing admixture and polymer stabilizer respectively at prescribed ratios into the compsn. CONSTITUTION:The above-mentioned cement compsn. contains the compsn. of the following ratios in 100 pts.wt. The compsn. contains 85 to 95 parts Portland cement; 2 to 5 parts fine silica powder; 0.5 to 2 parts >=1 kinds of ZrO2 and MgO; 0.5 to 2 parts alkaline (earth) metal salt of the stearic acid; 1 to 6 parts cement quick-setting agent essentially composed of Na2CO3; 0.2 to 1 part water-reducing admixture such as lignin sulfonate; 0.1 part polymer stabilizer such as CMC. The above-mentioned cement compsn. is kneaded with a proper ratio of inorg. aggregate and water, by which mortar having 0cm slump value and excellent natural flowability is obtd. In addition, bleeding after the placement does not raise and both the strength and watertightness of hardened material after completion are excellent.</p> |
