改性磷石膏做缓凝剂的硅酸盐水泥制备研究  

作　　者：柳学忠 周卫兵[2] 徐保国 朱教群[2] 周贤凯 李康 

机构地区：[1]娲石水泥集团有限公司,湖北武汉430070 [2]武汉理工大学材料科学与工程学院,湖北武汉430070

出　　处：《水泥》2024年第S01期14-17,共4页Cement

摘　　要：分别对以脱硫石膏、磷石膏和经生石灰中和后的改性磷石膏做缓凝剂所制备普通硅酸盐水泥进行全面研究。通过对水泥的凝结时间、结合水量和力学性能进行测定,并通过XRD、SEM研究石膏引入对于水泥水化产物的物相分布和微观结构的影响,从物理性能和微观机理上探究了磷石膏对于水泥早期水化的影响。Desulfurized gypsum,phosphogypsum and modified phosphogypsum neutralized by lime were introduced as retarders to prepare Portland cement.The setting time,combined water volume and mechanical properties of cement were measured,and the phase distribution and microstructure of cement hydration products were analyzed by XRD and SEM.The effect of phosphogypsum on early cement hydration was explored from the physical properties and microscopic mechanism.

关 键 词：改性磷石膏 凝结时间 力学性能 水化 

分 类 号：TQ172.462[化学工程—水泥工业]