Influence of assorted waste on building ceramic properties

Abstract

Influence of the combined use of catalytic cracking catalyst and milled glass waste on the properties of building ceramics (density, compressive strength, water absorption, frost resistance) is analysed in the paper. The research showed that under the 1050°C temperature firing regime, catalyst waste decreases density, compressive strength and frost resistance of ceramic samples, while milled glass increases the values of these parameters. The formation mix without milled glass and with 20% of catalyst waste had the following values of physical-mechanical properties: density 1590kg/m3, compressive strength 17.5MPa, frost resistance 195 cycles, and water absorption about 18.0%. The formation mix without catalyst waste and with 20% of milled glass had the values of density 1790kg/m3, compressive strength 29.2MPa, frost resistance more than 300 cycles, and water absorption 12.6%. Firing samples at 1080°C temperature, the largest values of density (1980 kg/m3), compressive strength (36.1 MPa) and frost resistance (>300 cycles according to LST 1985:2006, unilateral method) were obtained for the formation mix containing the combination of 10% of catalyst waste and 10% of milled glass.