Eco-Friendly Fired Clay Tiles with Greenish and Greyish Colored Incorporating Alternative Recycled Waste Materials

Abstract:

This research intended to investigate the influence of rice husk ash (RHA), green glass cullet (GGC) and local white clay (LWC) in Thailand on the physical properties of fired clay tiles. Utilization of RHA and GGC were the main objectives. Proportion of RHA varying from 10-60% by weight was conducted. Specimens of mixture formulation were sintered at 950 °C. The results revealed that the formula no. A7 containing 70% GGC and 30% LWC can develop greenish color. In addition, scanning electron microscopy was carried out to characterize microstructure and found the glassy phase in fired specimen. Moreover, nepheline (Na₂Al₂Si₂O₈) and wollastonite (CaSiO₃) were detected by the X-ray diffraction technique. These phases can promote the strength of fired clay tiles. Meanwhile, the specimen of formula no. B13 comprising 60% GGC, 30% LWC and 10% RHA can develop the mullite phase (3Al₂O₃2SiO₂). Effect of utilizing RHA in this formula can develop greyish color of ceramic tiles. Physical properties of formula no. A7 and B13 can achieve 30.15, 24.54 MPa of bending strength and 1.91, 11.72% of water absorption. They all can pass Thai Industrial Standard (TIS 2508-2555). The result of this study can be employed to manufacture environmentally friendly fired clay tiles.

• Periodical: Key Engineering Materials (Volume 856)
• Pages: 376-383
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.856.376
• Online since: August 2020
• Authors: Ubolrat Wangrakdiskul, Purinut Maingam*, Natthakitta Piyarat
• Keywords: Eco-Friendly, Green Glass Cullet, Local White Clay, Rice Husk Ash (RHA), Wastes Utilization

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