Frost resistant porous ceramics

Extremely actual problem of these days is the production of ceramics which is resistant to frost under exploitation and jointly effective (porous), because these ceramic wall articles will be particularly suitable for building the facades which are being exploited under aggressive conditions (e.g. a seaside zone). Such a brick building will have a low coefficient of thermal conductivity and will be resistant to frost (the surface of the bricks will not decay). The porous and at the same time frost resistant (under exploitative conditions) ceramic material was obtained, when composition of formation mix was as follows: (59.2 – 72.8) % of clay, (7.2 – 10.8) % of sand, (3.2 – 4.8) % of crushed bricks, (10.4 – 15.6) % of sawdust and (6.4 – 9.6) % of milled glass. When ceramic samples were formed and burned under regime (maximum burning temperature is to 1100 °C), ceramics which exploitation frost resistance is more than 300 cycles, total open porosity is 40 %, and the predicted coefficient of thermal conductivity is (0.37 – 0.42) W/mK