The usabiliy of ceramic polishing residues as the insulation material

Around the world, millions of tons inorganic wastes are produced every day. Traditionally, these wastes have been disposed of in landfills and often dumped directly into ecosystems without adequate treatment. Restoration and recycling is the best environmental solution to save raw materials and to reduce the amount of industrial wastes discarded. In this study, different amounts of clay and cellulose additions were made at different sintering temperature and time to the porcelain polishing waste exposed during the polishing process and the production of thermal insulation material was investigated. Seven different compounds were studied: K0, K1, K2, K3 and S1, S2, S3. Composition without clay and cellulose addition is marked as K0. Thus, composition addition with 2,5 wt % clay is as K1, composition addition with 5 wt % clay is as K2, composition addition with 10 wt % clay is as K3, the composition addition with 2,5 wt % cellulose as S1, composition addition with 5 wt % cellulose as S2 and composition addition with 10 wt % cellulose marked as S3. The all samples are dry pressed and all pellets are sintered at 1000, 1050 and 11000C for different sintering times as 60, 120, 180 and 300 minutes. Physical, thermal and mechanical properties of the samples were determined by weight loss, firing shrinkage, volume shrinkage, bulk density, water absorption, thermal diffusivity, thermal conductivity, three point bending, microstructural and phase analysis. As a result of the studies, densification was observed at 1000 and 10500C, while at 11000C the density decreased to 0,5 g / cm3 and obtained porous ceramic materials. Although the porous microstructure, water absorption values are under % 2. Thermal conductivity was obtained as 0,097 W/m*K in S2 samples with addition 2,5 wt % cellulose sintered at 11000C for 120 minutes. Also, the flexure resistance was obtained as 3,09 MPa. On the other hand, at the same conditions, termal conductivity and the flexure resistance were measured for Ytong gas concrete as 0,179 W/m*K and 0,73 MPa, respectively.