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首页 > 过刊浏览>2023年第26卷第9期 >1023-1030. DOI:10.3969/j.issn.1007-9629.2023.09.010
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高掺量丁苯乳液改性硫铝酸盐水泥的早期性能
作者:
作者单位:

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

作者简介:

元 强（1981—），男，江西乐安人，中南大学教授，博士生导师，博士. E-mail： yuanqiang@csu.edu.cn

通讯作者:

姚 灏（1991—），男，江西浮梁人，中南大学讲师，硕士生导师，博士. E-mail： yaohao@csu.edu.cn

中图分类号:

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）


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

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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    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.

    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.

    表 2 SAC的矿物组成Table 2 Mineral composition of SAC
    表 3 SBR乳液改性硫铝酸盐水泥的配合比Table 3 Mix proportions of SBR latex modified SAC
    表 6 不同测试组SBR和水化产物的含量Table 6 Content of SBR and hydration products of different test groups w/%
    表 5 SBR乳液改性硫铝酸盐水泥的水化动力学参数Table 5 Hydration kinetic parameters of SBR latex modified SAC
    表 1 SAC的化学组成Table 1 Chemical composition of SAC
    表 4 SBR乳液改性硫铝酸盐水泥净浆的凝结时间Table 4 Setting times of SBR latex modified SAC pastes
    图1 SBR分子的FTIR图谱Fig.1 FTIR spectrum of SBR molecule
    图2 硫铝酸盐水泥和SBR颗粒的粒径分布Fig.2 Particle size distributions of SAC and SBR
    图3 水泥净浆流变测试Fig.3 Rheological shear test of cement paste
    图4 不同测试组的流变曲线和流变参数Fig.4 Rheological curves and parameters of different test groups
    图5 不同测试组的水化曲线Fig.5 Hydration curves of different test groups
    图6 不同样品的DTG曲线Fig.6 DTG curves of different specimens
    图7 不同测试组XRD谱Fig.7 XRD patterns of different test groups
    图8 不同测试组矿物的半定量含量Fig.8 Semi-quantitative contents of minerals in different test groups
    图9 不同测试组5.0 min水合物的扫描电镜结果Fig.9 SEM results of hydrates in different test groups at 5.0 min
    表 7 不同测试组叉点处的元素含量Table 7 Element content in different test groups
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元强,谢宗霖,姚灏,张建强,姜孟杰.高掺量丁苯乳液改性硫铝酸盐水泥的早期性能[J].建筑材料学报,2023,26(9):1023-1030

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  • 收稿日期:2022-11-03
  • 最后修改日期:2022-12-01
  • 在线发布日期: 2023-10-10
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