高掺量丁苯乳液改性硫铝酸盐水泥的早期性能  

Early Performance of High Use Level Styrene-Butadiene Rubber Latex Modified Sulphoaluminate Cement

作　　者：元强[1,2] 谢宗霖 姚灏 张建强 姜孟杰 YUAN Qiang;XIE Zonglin;YAO Hao;ZHANG Jianqiang;JIANG Mengjie(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Research Center of High‑Speed Railway Construction Technology,Central South University,Changsha 410075,China;China Railway Shanghai Bureau Group Co.,Ltd.,Shanghai 200071,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程研究中心,湖南长沙410075 [3]中国铁路上海局集团有限公司,上海200071

出　　处：《建筑材料学报》2023年第9期1023-1030,1038,共9页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51922109);中国中铁股份有限公司科技研究开发计划项目(2020-专项-02);“十四五”国家重点研发计划项目(2022YFB2602600)。

摘　　要：研究了丁苯(SBR)乳液掺量对硫铝酸盐水泥流变性能、水化放热及水化产物的影响.结果表明,当SBR乳液掺量超过20%时,硫铝酸盐水泥净浆的固含量增大,聚合物加速聚集黏附,增加了净浆的屈服应力和塑性黏度,缩短了净浆的凝结时间并增大了浆体的水化放热,钙矾石随着SBR乳液掺量的增大逐渐增多,促进了硫铝酸盐水泥的早期水化进程.The influence of styrene-butadiene rubber(SBR)latex content on the rheological properties,hydration heat release,and hydrates of sulphoaluminate cement(SAC)was investigated.The results show that if the SBR latex content is more than 20%,with increasing SBR latex content,the solid content of cement paste increases,and the agglomeration and adherence of the polymer are accelerated.It improves yield stress and plastic viscosity,shortens the setting time,and increases hydration heat release of cement paste.The content of ettringite gradually increases with the increase of SBR latex content.Therefore,high use level of SBR latex can promote the early hydration of SAC.

关 键 词：硫铝酸盐水泥 丁苯乳液 流变性能 水化 物相组成 

分 类 号：TU528.042[建筑科学—建筑技术科学]