Comparison of Dolomite Clay and Cullet Addition on Physical and Mechanical Properties of Clay Bricks

Abstract

The purpose of this study was to study and characterize the properties of physical – mechanical for clay bricks. The raw materials used in the study are from local sources. They are Sri Khum red clay, dolomite and cullet. The component ratio of clay brick as an addition Sri Khum red clay 50–90 %, foaming agent (dolomite and cullet) 10–50%. The characterization of raw material was analyzed by particle analyzer, X-ray fluorescence (XRF) and X-ray diffraction (XRD). The shrinkage, water absorption and compressive strength of clay brick were tested. The results showed that the properties of clay bricks after firing at temperature at 900°C were studied. The Sri Khum red clay 80% and cullet 20% had a shrinkage of 6.95%, water absorption of 20.4% and compressive strength of 182 kg/cm2. The physical – mechanical of clay brick achieved the requirements of Thai industrial standard (TIS 77-2545).