| 摘要 |
PURPOSE:To improve formability by adding and kneading a lightweight aggregate such as perlite having a closed cellular foam structure, reinforcing fiber, other aggregates, a plasticizer and water with cement. CONSTITUTION:A fiber-reinforced lightweight cement composition is obtained by adding and mixing 30-120 pts.wt. lightweight aggregate such as perlite having a closed cellular foam structure of 0.2-0.8mm average grain diameter and 0.15-0.3g/cm<3> bulk density, 5-40 pts.wt. reinforcing fiber such as asbestos or pulp having 0.05-5mm fiber length, 50-150 pts.wt. other aggregates such as crushed stone having 0.01-2mm grain diameter and 1-10 pts.wt. plasticizer such as methyl cellulose with 100 pts.wt. cement such as blast furnace cement. An adequate amount of water is further added to the aforementioned cement composition and kneaded. The kneaded mixture is subsequently press formed and the resultant compact is cured under prescribed conditions, dried and hardened to afford a fiber-reinforced lightweight cement compact. |
