Red ceramics produced from mixtures of kaolinite clay and waste glass

Red ceramics were produced at 750°C by mixing reddish yellow kaolinite clay from Marom (West Region of Cameroon) with waste glass (percentage ranging between 0 and 15% mass). Depending on the nature of the materials, kaolinite clay, waste glass and ceramics were characterized by determination of chemical and mineralogical compositions, linear shrinkage, water absorption, flexural strength and variation of color of fired samples. Thermal analysis and Fourier transform infrared spectroscopy were done as well. The final color of ceramics was red, water absorption varied between 17.40 and 13.70%, linear shrinkage ranged between 0.70 and 1.20% and flexural strength was between 5.30 and 8.10 MPa. These results showed that mixing kaolinite clay with waste glass is an interesting process to get red ceramics destined for red bricks or roofing tiles at 750°C.