Recycling Limestone Dust Waste for Thai Pottery Production

Abstract

In this project, limestone dust from a limestone crushing plant was mixed with several pottery clays from the Northeasetern part of Thailand, i.e., Ban Ponsai, Ban Tha Hai, Ban Nanuan and Ban Nam Kamnoi. The limestone dust was sieved and then mixed with 4 sources of clays at 50 wt%. Samples with and without limestone dust were sintered at 700°C for 1 h. Compared to the samples without limestone dust, the samples with limestone dust showed higher flexural strength and slightly higher water absorption, but lower linear firing shrinkage. Furthermore pottery was produced using the mixture of pottery clay and limestone dust.