|本期目录/Table of Contents|

[1]张丽娟,何萌,赵军,等.纤维自密实再生混凝土力学性能及早期抗裂性能研究[J].建筑科学与工程学报,2025,42(05):105-114.[doi:10.19815/j.jace.2024.03059]
　ZHANG Lijuan,HE Meng,ZHAO Jun,et al.Study on mechanical properties and early cracking resistance of fiber self-compacting recycled concrete[J].Journal of Architecture and Civil Engineering,2025,42(05):105-114.[doi:10.19815/j.jace.2024.03059]
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纤维自密实再生混凝土力学性能及早期抗裂性能研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
42卷
期数:
2025年05期
页码:
105-114
栏目:
建筑材料
出版日期:
2025-09-30

文章信息/Info

Title:
Study on mechanical properties and early cracking resistance of fiber self-compacting recycled concrete
文章编号:
1673-2049(2025)05-0105-10
作者:
张丽娟1,何萌1,赵军2,王志1
(1. 郑州大学 力学与安全工程学院,河南 郑州 450001; 2. 郑州大学 土木工程学院,河南 郑州 450001)
Author(s):
ZHANG Lijuan1, HE Meng1, ZHAO Jun2, WANG Zhi1
(1. School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China; 2. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, Henan, China)
关键词:
纤维自密实再生混凝土;  钢纤维;  聚丙烯纤维;  流动性;  力学性能;  早期抗裂性能
Keywords:
fiber self-compacting recycled concrete;  steel fiber;  polypropylene fiber;  fluidity;  mechanical property;  early cracking resistance
分类号:
TU528
DOI:
10.19815/j.jace.2024.03059
文献标志码:
A
摘要:
将钢纤维和聚丙烯纤维掺入自密实再生混凝土中制备试件,通过试验研究了纤维对其坍落扩展度、抗压强度、劈拉强度的影响; 基于ASTM C1579设计了一种小型平板开裂模具,使用该模具测试了自密实再生混凝土的早期抗裂性能; 对比分析了两种纤维对自密实再生混凝土力学性能的影响,建立了纤维自密实再生混凝土抗压强度和劈拉强度的计算公式。结果表明:使用再生骨料使自密实混凝土坍落扩展度降低2.4%,平均裂缝宽度增加15.9%,裂缝变异系数增大58.8%; 两种纤维的掺入进一步降低了再生自密实混凝土的流动性,但改善了其早期抗裂性能; 钢纤维和聚丙烯纤维的裂缝降低系数最高分别达到65.4%和53%,并使自密实再生混凝土的裂缝变异系数减小了55.6%和66.7%; 纤维对自密实再生混凝土抗压强度的增强效果较弱,对劈拉强度的增强效果较为明显,钢纤维和聚丙烯纤维的掺入使劈拉强度最高增幅分别达到了127%和26%。
Abstract:
The steel fibers and polypropylene fibers were incorporated into self-compacting recycled concrete to prepare specimens, and the effects of fibers on slump flow, compressive strength and splitting tensile strength were studied by experiment. A small sized panel cracking mold based on ASTM C1579 was designed to test the early cracking resistance of self-compacting recycled concrete. The effects of two types of fibers on the mechanical properties of self-compacting recycled concrete were compared and analyzed, and the calculation formulas for the compressive strength and splitting tensile strength of fiber self-compacting recycled concrete were established. The results show that the use of recycled aggregates reduces the slump flow of self-compacting concrete by 2.4%, decreases the average cracking width by 15.9%, and increases the cracking variation coefficient by 58.8%. The addition of two types of fibers further reduces the flow-ability of self-compacting recycled concrete, but improves the early cracking resistance. The maximum cracking reduction coefficients of steel fibers and polypropylene fibers reach to 65.4% and 53%, and the cracking variation coefficients of self-compacting recycled concrete are reduced by 55.6% and 66.7%, respectively. While the steel fibers and polypropylene fibers have a weaker impact on the compressive strength of self-compacting recycled concrete, they have a more significant effect on the splitting tensile strength, with the most substantial increase reaching 127% and 26% by addition of steel fibers and polyropylene, respectively.

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相似文献/References:

备注/Memo

备注/Memo:
收稿日期:2024-03-15 投稿网址:http://jace.chd.edu.cn
基金项目:国家自然科学基金青年科学基金项目(51808509); 教育部创新团队项目(IRT_16R67); 河南省科技厅科技攻关项目(242102320343); 郑州大学青年教师培育项目(JC23540042)
作者简介:张丽娟(1981-),女,工学博士,副教授,E-mail:zhanglj0526@zzu.edu.cn。
通信作者:赵 军(1971-),男,工学博士,教授,E-mail:zhaoj@zzu.edu.cn。
Author resumes: ZHANG Lijuan(1981-), female, PhD, associate professor, E-mail:zhanglj0526@zzu.edu.cn; ZHAO Jun(1971-), male, PhD, professor, E-mail:zhaoj@zzu.edu.cn.
更新日期/Last Update: 2025-09-25