The performances of cement mortar mixed with low melting point glass powder were studied.The compressive strength and flexural strength of cement mortar specimens before and after different calcination temperatures were tested, and the strength residual rateh, brittleness coefficient and microstructure were analyzed. The results show that the low melting point glass powder can significantly improves the performance of heat resistance cement mortar at a high calcination temperature（ 900 ℃）,including improving the strength residual rate and reducing the brittleness coefficient. The effect is better especially with fly ash or slag powder. when with 10% low melting point glass powder and 15% fly ash,the compressive strength of the residual rate of improvement is 40%,improved by up to 48%,and the brittleness coefficient is 5. 63. With 10% low melting point glass powder and 15% slag powder,the compressive strength of the residual rate is 52%,and the bending strength of the residual rate is 50%.
Bulletin of the Chinese Ceramic Society
low meltingpoint glass powder
strength residual rate