保温时间对高掺量粉煤灰烧结砖显微结构及性能的影响

The Effect of Sintering Time on Microstructure and Properties of High Fly-ash Content Fired Brick

利用XRD、SEM等测试手段 ,研究了不同保温时间对各种掺量的粉煤灰烧结砖的显微结构及性能的影响。结果表明 ,在 10 5 0℃下烧成 ,粉煤灰掺量为 5 0 %保温 5h的烧结砖性能最佳 ,而在同样温度下烧成 ,粉煤灰掺量为 80 %的烧结砖的最佳保温时间为 8h。在适宜保温时间下 ,烧结砖中孔隙少且不连通 。

The effect of sintering time on the microstructure and properties of various flyash content fired brick was studied by XRD, SEM and so on. The result show that the brick fired at 1050℃ can obtain the optimum properties, the sintering time is 5h with 50% flyash content by weight, and that is 8h with 80% flyash content by weight. On the suitable sintering time, the brick well distributed microstucture, isolating porosity.