A porosity prediction methodology of building ceramics with burning-out additives

Abstract

A methodology for prediction of the porosity of building ceramics caused by burning-out additives are proposed in the present article. The methodology is suitable when particles of burning-out additives is much larger than voids between particles of clay and filler. The proposed equations were verified by comparing theoretical calculations of the porosity with empirical data of ceramic articles of various compositions and with various amount of the burning-out additives. Crushed rubber was used as the burning-out additive. The Student test t was used for verifying statistic significance of difference between theoretical calculations and empirical data. The comparison showed a quite good agreement between the theoretical calculations and the empirical data. The proposed methodology can be useful to compose compositions of building ceramic articles, using burning-out additives, with desirable physical and mechanical properties – porosity, density, thermal conductivity, frost resistance, strength, modulus of elasticity and etc.