Densification and Thermomechanical Properties of Conventional Ceramic Composites Containing Two Different Industrial Byproducts

Abstract

2 Abstract: The influence of the leached cement kiln dust waste (LCD) and Homra (H) as new raw materials on the densification and thermo-mechanical properties of conventional ceramic body has been studied. The results showed that as the firing temperature increases, the densification and mechanical properties evidently improved and enhanced up to 10 wt. % LCD content at all firing temperatures, but more than 10 wt. % LCD have inverse behavior. The dry shrinkage was unchanged with the substitution of the LCD up to 20 wt. %, while the firing shrinkage slightly increased at 1050 and 1100°C, but sharply at 1150°C. The samples with higher porosity showed a greater dimensional stability and therefore they can be used as wall tiles, whilst those with low porosity can be used as floor tiles. So, the optimum body batch was that containing 10 wt.% LCD and 5 wt.% H fired at 1150 °C, which achieved the best data of densification and mechanical properties. The XRD analysis showed that the detected final phases are quartz, anorthite (CAS ), traces of hematite and cyclo-wollastonite 2 and calcium-rich silicate phases which played an important role to improve the various characteristics of the fired articles.