Effect of different mineral admixtures on physical characteristics of building gypsum

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.