Utilization of Rice Husk Ash and Waste Sludge from Cutting Glass Manufacturing with Angthong Pottery

Abstract

Efficiently utilization of rice husk ash (RHA) and waste sludge from cutting glass manufacturer (WSG) as additives to pottery clay would yield positive economic impacts, such as more friendly industrial ecosystems. In this study, The RHA and WSH were used as additives to Angthong pottery clay (APC) and casting and fired properties were examined. Two sets of sample with a mixture consisting of 60% APC, 20% RHA, and 20% WSG (CRG formula) and non-added clay (C100 formula) were prepared by slip casting technique. Samples were fired at temperature 900 °C and 1100°C; then the viscosity of slurry, linear shrinkage, water adsorption, and 3-point bending strength were measured. The results showed that the optimum viscosity for slip casting of CRG and C100 were 1638 cP and 983 cP, respectively. The water adsorptions of all samples decrease while their shrinkage and strength increase with temperature. At 900°C, the water adsorption and the strength of CRG were 32% and 1184 psi, respectively. Comparatively, CRG’s water absorption was 1.5 times higher than C100’s, while their mechanical strength was insignificantly different. This due to the RHA behaves as pore forming and the WSG promotes the sintering of samples.

Influence of Boric Acid Additive on Physical Properties of Utilizing Wastes for Producing Eco-Friendly Fired Clay Tiles

“…In general, the community industries in Angthong province have been using these local clays to produce tiles, bricks, pottery, etc. However, utilizing the depleting natural resources for a long time, Angthong clay in Thailand has decreased in recent years [4]. Therefore, finding a solution for such resource scarcity is urgent matter and it can be done by exploit alternative materials from the waste industry as an effective way to achieve Angthong clay sustainability.…”

“…In the previous research, Kaewtabut et al reported similar study utilized 60% Angthong clay, 20% RHA, and 20% waste sludge from the cutting glass and compared with the 100% clay fired at 900°C. Therefore, the results showed low shrinkage led to high water absorption, but did not affect the mechanical strength [4]. Wangrakdiskul et al developed greyish colored wall tiles by utilizing 10% RHA, 60% green glass cullet, and 30% white clay.…”