| 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. |
| 关键词: 硫铝酸盐水泥 丁苯乳液 流变性能 水化 物相组成 |
| DOI：10.3969/j.issn.1007-9629.2023.09.010 |
| 分类号:TU528.042 |
| 基金项目: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） |
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| Early Performance of High Use Level Styrene-Butadiene Rubber Latex Modified Sulphoaluminate Cement |
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YUAN Qiang1,2, XIE Zonglin1,2, YAO Hao1,2, ZHANG Jianqiang3, JIANG Mengjie1,2
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1.School of Civil Engineering， Central South University， Changsha 410075， China;2.National Engineering Research Center of High-Speed Railway Construction Technology， Central South University， Changsha 410075， China;3.China Railway Shanghai Bureau Group Co.， Ltd.， Shanghai 200071， China
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| Abstract: |
| 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. |
| Key words: sulphoaluminate cement styrene-butadiene rubber latex rheological property hydration phase composition |
