The Effect of Meta-kaolin on the Pozzolan Reaction of Lightweight Porous Concrete

Abstract

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.