利用磨细钢渣调控β-半水石膏凝结时间  

Controlling the Retarding Characteristics of β-semi-hydrated Gypsum with Ground Steel Slag

作　　者：孙树玲 范天本 陈雄木 赵风清[1,2] Sun Shuling;Fan Tlanben;Chen Xlongmu;Zhao Fengqing(College of Chemical and Pharmaceutical Engineering Hebei University of Science & Technology,Shijiazhuang 050018;Hebei Engineering Research Center of Solid Wastes Utilization)

机构地区：[1]河北科技大学化学与制药工程学院,河北石家庄050018 [2]河北省固体废弃物工程技术研究中心,河北石家庄050018

出　　处：《粉煤灰综合利用》2018年第6期66-69,共4页Fly Ash Comprehensive Utilization

摘　　要：研究发现,钢渣对一些煅烧石膏具有一定的缓凝作用。当钢渣掺入量为3 %时,初凝时间达到150 min,而对照组的磨细石英砂对石膏的凝结时间几乎没有影响。利用SEM观察石膏硬化体的微观结构,在相同的养护条件下含有钢渣-石膏体系中二水石膏晶体变短,与空白对照样相比数量也有所减少,造成石膏体系凝结时间延长和一定的强度损失。It was found that steel slag has retarding effect on some calcined gypsum.When the addition of steel slag was 3 %,the initial setting time reached 150 min.However,the ground fine quartz sand in the control group had no influence on the setting time of gypsum.The microstructure of hardened gypsum plaster was observed by SEM.The crystal of dihydrate gypsum in steel slag-gypsum system became shorter and the quantity significantly decreased which led to prolonged setting time and a certain loss of mechanical strength of gypsum.

关 键 词：钢渣 β一半水石膏 凝结时间 微观结构 

分 类 号：TQ177.373[化学工程—硅酸盐工业]