硫酸盐对聚羧酸减水剂分散性能的影响  

Effect of Sulfate on Dispersibility of Polycarboxylate-type Superplasticizer

作　　者：万煜[1] 王智[1] 郭清春[1] 贾兴文[2] 

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《硅酸盐通报》2011年第3期634-638,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(No.50972170);重庆大学"211工程"三期建设研究生开放实验室支持

摘　　要：研究了硫酸盐类型及含量对掺有聚羧酸减水剂的水泥净浆流动度、砂浆扩展度的影响,以及对浆体粘度和浆体液相溶液表面张力的影响。研究表明:易溶性硫酸盐K2SO4、Na2SO4对水泥浆体分散性能的负面影响比二水石膏大,但有适量易溶性硫酸盐存在时,SO24-快速溶解于浆体液相溶液中,减少水泥颗粒和水化产物对聚羧酸减水剂分子的包裹和消耗,降低液相溶液表面张力,增加表面活性,提高微引气作用,有利于提高聚羧酸减水剂的分散性。The influence of degree, viscosity of cement types and content of sulfate on slurry and the surface tension fluidity of cement paste, mortar dispersion of cement paste liquid phase solution with polycarboxylate-type superplasticizer was investigated. It is showed that processable sulfate, such as K2SO4 and Na2SO4 have more negative effects on paste dispersion than CaSO4 · 2H2O, but SO2 could solve in liquid rapidly when a reasonable amount of proeessable sulfate exist, and reduce cement particles and hydration products to wrap and consume polyearboxylate-type superplasticizer molecular, and lower liquid solution surface tension, and increase surface activity, improve micro air-entraining role, which was used to improve the dispersion of polycarboxylate-type superplastieizer.

关 键 词：硫酸盐 聚羧酸减水剂 分散性能 粘度 表面张力 

分 类 号：TQ171[化学工程—玻璃工业]