粉磨对石膏粉煤灰胶结料性能的影响  

Effect of Grinding on the Properties of Gypsum-Fly Ash Binding Material

作　　者：郑兵[1] 马保国[1] 黄从运[1] 蹇守卫[1] 陈嘉懿[1] 

机构地区：[1]武汉理工大学硅酸盐材料工程教育部重点实验室,湖北武汉430070

出　　处：《济南大学学报（自然科学版）》2011年第3期225-230,共6页Journal of University of Jinan(Science and Technology)

基　　金：国家高新技术研究发展计划(2009AA11Z106);湖北省科技攻关计划(2010G0082)

摘　　要：采用XRD、SEM和DSC-TG等测试方法研究不同粉磨时间下石膏(β-半水石膏)-粉煤灰胶结料的流动度、凝结时间、强度、耐水性能以及粉磨对胶结料水化的影响。结果表明:粉磨增大了石膏粉煤灰胶结料的比表面积,降低了胶结料的流动度,缩短了凝结时间;粉磨对胶结料3 d干/湿强度和软化系数的改善效果并不明显,但可大幅提高胶结料28 d抗压强度、湿抗折强度和软化系数,改善胶结料的耐水性;粉磨后的胶结料在水化后期生成更多的钙矾石等水化产物,提高了石膏粉煤灰胶结料颗粒的活性。The fluidity,setting time,strength,water resistance and hydration products of gypsum（β-hemihydrate gypsum）-fly ash binding material under different grinding time were investigated by using XRD,SEM,DSC-TG and other testing methods.The results show that grinding reduces the fluidity of the binding material and shortens its setting time as the specific surface area of the gypsum-fly ash binding material is increased,and that grinding has little effect on the 3 d strength and softening coefficient of the binding material,however,it significantly improves its 28 d compressive,wet bending strength and softening coefficient,especially for its water resistance.More ettringite and other hydration products are generated in the post-hydration because grinding increases the activity of the binding material particles.

关 键 词：粉磨 石膏 粉煤灰 耐水性 

分 类 号：TU502[建筑科学—建筑技术科学]