三异丙醇胺对钢渣水泥体系力学性能和水化特性的影响
作者:
作者单位:

1.武汉科技大学 城市建设学院,湖北 武汉 430065;2.武汉科技大学 城市更新湖北省工程研究中心,湖北 武汉 430065;3.武汉科技大学 高性能工程结构研究院,湖北 武汉 430065

作者简介:

王 晟(1998—),男,湖南邵阳人,武汉科技大学硕士生. E-mail:876928980@qq.com

通讯作者:

梅军鹏(1986—),男,河南漯河人,武汉科技大学副教授,硕士生导师,博士. E-mail:meijunpeng2006@126.com

中图分类号:

TQ172

基金项目:

“十四五”湖北省优势特色学科(群)项目(2023D0503);硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金资助项目(SYSJJ2022-20);湖北省建设科技计划项目(厅头[2023]1656号-075);湖北省青年科技人才专项(2023DJC182)


Influence of Triisopropanolamine on Mechanical Properties and Hydration Characteristics of Cement-Steel Slag System
Author:
Affiliation:

1.School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;2.Hubei Provincial Engineering Research Center of Urban Regeneration, Wuhan University of Science and Technology, Wuhan 430065, China;3.Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China

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    摘要:

    通过抗压强度、水化热、压汞仪、X射线衍射仪、热重分析仪和扫描电镜等,研究了三异丙醇胺(TIPA)对钢渣水泥体系力学性能和水化特性的影响.结果表明:随着TIPA掺量(0.03%~0.09%)的增加,钢渣水泥体系的抗压强度提高,7、28 d抗压强度分别提升了35.1%~37.9%和23.8%~35.7%;掺加TIPA促进了钢渣水泥体系的水化反应和钢渣的火山灰反应,进而加速了水化硅酸钙凝胶、三硫型水化硫铝酸钙和单硫型水化硫铝酸钙等水化产物的形成;掺加TIPA降低了试件的孔隙率,0.06%掺量的TIPA使7、28 d龄期试件的总孔体积分别减少了44.58%和21.77%.

    Abstract:

    The influences of triisopropanolamine(TIPA) on the mechanical properties and hydration characteristics of cement-steel slag system were investigated through compressive strength, hydration heat, mercury porosimeter, X-ray diffractometer, thermal analyzer and scanning electronic microscope. The results show that the compressive strength of the cement-steel system increases with the rising of TIPA dosages(0.03%-0.09%), which is enhanced by 35.1%-37.9% and 23.8%-35.7% at 7 d and 28 d, respectively. The hydration reaction of the cement-steel system and the pozzolanic reaction of the steel slag are promoted with the addition of TIPA, which in turn accelerates the formation of hydration products such as calcium silicate hydrate gels and ettringaite. The porosity of the specimen also decreases with the incorporation of TIPA, and 0.06% TIPA makes the total pore volume reduce by 44.58% and 21.77% at 7 d and 28 d, respectively.

    表 3 试件的累积水化放热量Table 3 Cumulative heat releases of specimens
    表 5 试件的质量损失率和CH含量Table 5 Mass loss ratio and CH content of specimens
    表 1 水泥和钢渣的化学组成Table 1 Chemical compositions(by mass) of cement and steel slag
    表 2 试件的配合比Table 2 Mix proportions of specimens
    图1 TIPA的分子结构Fig.1 Molecular structure of TIPA
    图2 试件的抗压强度Fig.2 Compressive strength of specimens
    图3 试件的水化放热速率Fig.3 Hydration heat evolution rate of specimens
    图4 试件的孔径分布Fig.4 Pore size distribution of specimens
    图5 试件的XRD图谱Fig.5 XRD patterns of specimens
    图6 试件的TG-DTG曲线Fig.6 TG-DTG curves of specimens
    图7 试件的SEM照片Fig.7 SEM images of specimens
    表 4 试件的孔径分布参数Table 4 Pore structural parameters of specimens
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引用本文

王晟,梅军鹏,谢佳诚,陈一纯,戴俊杰.三异丙醇胺对钢渣水泥体系力学性能和水化特性的影响[J].建筑材料学报,2024,27(11):977-985

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  • 收稿日期:2023-11-30
  • 最后修改日期:2024-03-08
  • 在线发布日期: 2024-12-10
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