2008 年 55 巻 3 号 p. 115-119
The study measures the effect of domestic kaolin on the compressive strength of cement mortar and lightweight porous concrete. The kaolin was thermally treated in an electric furnace at T = 800°C for a pozzolan reaction. Cement mortar and lightweight porous concrete were used to compare the effect of adding meta-kaolin (0%~30%). As a result, mixture with 10%~15% meta-kaolin obtained the highest compressive strength. The tests were also applied to investigate the effect of a meta-kaolin particle size in lightweight porous concrete. The mixtures were made by replacing cement with 15% meta-kaolin while varying the particle size of meta-kaolin. The lightweight porous concrete with 38~48 μm meta-kaolin in 15% replacement develops 100% higher compressive strength than no addition of meta-kaolin.