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首页 > 过刊浏览>2022年第25卷第1期 >24-30. DOI:10.3969/j.issn.1007-9629.2022.01.004
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矿渣粉对钢纤维自密实混凝土性能的影响
作者:
作者单位:

1.天津大学 建筑工程学院 天津 300072;2.天津大学 滨海土木工程结构与安全教育部重点实验室 天津 300072

作者简介:

赵 云（1994—），男，河北张家口人，天津大学博士生. E-mail：tjuzhao1994@163.com

通讯作者:

毕继红（1965—），女，江苏宜兴人，天津大学教授，博士生导师，博士. E-mail：jihongbi@163.com

中图分类号:

TU528.01

基金项目:

国家自然科学基金资助项目（51227006）


Influence of Granulated Blast Furnace Slag on the Properties of Steel Fiber Reinforced Self-compacting Concrete
Author:
Affiliation:

1.School of Civil Engineering，Tianjin University，Tianjin 300072，China;2.Key Laboratory of Coast Civil Structure Safety of Ministry of Education，Tianjin University，Tianjin 300072，China

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    摘要:

    研究了矿渣粉掺量对钢纤维自密实混凝土（SFRSCC）工作性能和力学性能的影响，并从微观层面阐释钢纤维和矿渣粉对混凝土基体的增强作用.结果表明：采用10％掺量的矿渣粉代替水泥能有效提高新拌混凝土的工作性能，增加钢纤维体积分数会减弱自密实混凝土的工作性能；矿渣粉与钢纤维的协同作用能够显著提高混凝土的抗压强度、劈裂抗拉强度和抗折强度；采用矿渣粉替代水泥有助于生成更致密的微观结构.

    Abstract:

    The effect of the content of blast furnace slag on the workability and mechanical properties of steel fiber reinforced self-compacting concrete （SFRSCC） was studied. The strengthening effect of steel fiber and blast furnace slag on the concrete matrix was explained in a view of microstructure level. The results show that substituting 10% cement with blast furnace slag can effectively improve the workability of fresh concrete， while increasing fiber volume fraction can obviously weaken the workability of self-compacting concrete. The synergistic effect of blast furnace slag and steel fiber can significantly improve the compressive strength， splitting tensile strength and flexural strength of hardened concrete. Replacing cement with blast furnace slag is efficient to generate a denser microstructure.

    表 1 SFRSCC的配合比Table 1 Mix proportions of SFRSCC
    图1 SFRSCC的拌制流程Fig.1 Mix procedure of SFRSCC
    图2 SFRSCC的坍落扩展度Fig.2 Slump flow diameter of SFRSCC
    图3 SFRSCC的坍落流动时间和V型漏斗流动时间Fig.3 T500 and Tv of SFRSCC
    图4 SFRSCC的L型箱两末端混凝土的高度比Fig.4 H2/H1 of concrete at two ends of L-box of SFRSCC
    图5 SFRSCC的抗压强度Fig.5 Compressive strength of SFRSCC
    图6 SFRSCC的28 d劈裂抗拉强度和抗折强度Fig.6 Splitting tensile strength and flexural strength of SFRSCC at 28 d
    图7 钢纤维从F0.9S0和F0.9S30试件中拔出后的SEM照片Fig.7 SEM images of steel fiber pulled out from F0.9S0 and F0.9S30 specimens
    图8 F0.9S0中附着在钢纤维表面基体的SEM照片和EDS分析Fig.8 SEM images and EDS analysis of matrix attached to the surface of steel fiber in F0.9S0
    图9 F0.9S30中附着在钢纤维表面基体的SEM照片和EDS分析Fig.9 SEM images and EDS analysis of matrix attached to the surface of steel fiber in F0.9S30
    参考文献
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赵云,毕继红,王照耀,霍琳颖,段逸辰.矿渣粉对钢纤维自密实混凝土性能的影响[J].建筑材料学报,2022,25(1):24-30

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  • 收稿日期:2020-09-21
  • 最后修改日期:2020-10-21
  • 在线发布日期: 2022-01-19
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