Abstract
In this study, for the purpose of recycling ceramic siding waste powder emitted in the cutting process, the decomposition behavior during heat treatment and the hydraulic property of heat treated ceramic siding waste powder were evaluated. The organic mixture could be removed by heating at 530 °C. Then, as determined from the result of XRD analysis, cement hydrate (CSH) could be changed to larnite (2CaO・SiO2) by heating at 530 °C and wollastonite (CaO・SiO2) by heating at 700 °C. In addition, when ceramic siding waste powder was molded by adding water after heating at 530 °C for various times, three-point bending stress became approximately constant by heating at 530 °C over 30 minutes. These results suggested that ceramic siding obtained a hydraulic property by heating at 530 °C over 30 minutes. Finally, it was conjectured that the ceramic siding waste powder could be reused as not only recycled aggregate but also recycled cement by heat treatment at 530 °C.
