不同矿物掺合料对建筑石膏物理性能的影响

Effect of different mineral admixtures on physical characteristics of building gypsum

粉煤灰、矿粉-粉煤灰、水泥-粉煤灰分别掺加到建筑石膏中,研究这3种体系中矿物掺合料对石膏的强度、凝结时间、流动度、软化系数等性能的影响,结果表明,粉煤灰具有一定的缓凝作用,水泥-粉煤灰的复掺可以提高石膏胶凝材料的抗压软化系数和强度,而水泥具有促凝作用,水泥、矿粉的加入可以提高石膏胶凝材料的流动度。

In this paper, the influences of singly adding fly ash, compositely adding fly ash and blast furnace slag, compositely adding fly ash and cement on the strength, setting time, flowing properties, intenerating coefficient of building gypsum were studied. The result indicates that fly ash can prolong the setting time,compositely adding cement and fly ash can enhance the compression resistant intenerating coefficient and strength,but cement can reduce the setting time,adding cement and blast furnace slag can enlarge the flowing properties.