カーバイドかす-けい石-高炉スラグ系の発泡コンクリートの研究

抄録

The effects of alhali on the physical quality of autoclaved lightweight concrete was examined. Slaked lime from carbide acetylene plant, siliceous stone and blast furnace slag were mixed in various proportion. These mixtures were kneaded with 6% Na₂CO₃ solution and were made in paste specimens. The bulk densities of them were controled by the quantity of aluminum powder added to be O. 6, 0.8 and 1. 1, and these specimens were cured in an autoclave at 180°C for 8 hours. When blast furnace slag was mixed and kneaded with 6% Na₂CO₃ solution, the strength was developed by the activated action of Na on the slag, and when the ratio of CaO to SiO₂ in chemical composition was 4 : 5, it showed the most developed strength. It is seemed that the action of Na on strength was caused by absorbing Si0₂ from slag and advanced the growth of tobermorite. Heat conductivity increased when slag was added, but bulk density and water absorption decreased.