CARBONATION OF NON-BURNT CASTING CERAMICS PRESSED IN VACUUM CONDITION

Abstract

In this paper, carbonations and compressive properties of non-burnt casting ceramics are reported. These properties were investigated by measuring the change of the weight of the casting ceramics and observing the cut section of the casting with Phenolphthalein Ethanol after carbonate curing. The results are as follows ; 1) The pore volume of the casting ceramics is reduced as the carbonation proceeds, and then the compressive strength of the casting is increased. 2) The heterogeneous distribution of the carbonation on the cross section of the casting ceramics is observed. 3) The carbonation becomes slow when the amount of the water is increased and the pressure on the casting ceramics is increased during the casting process.