[1]元成方、魏逸然、李爽.聚丙烯纤维混合再生骨料混凝土力学性能研究[J].郑州大学学报(工学版),2021,42(02):50-54.[doi:10.13705/j.issn.1671-6833.2021.02.001]
 Yuan Chengfang,Wei Yiran,Li Shuang,et al.Study on Mechanical Properties of Polypropylene Fiber Mixed Recycled Aggregate Concrete[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):50-54.[doi:10.13705/j.issn.1671-6833.2021.02.001]
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聚丙烯纤维混合再生骨料混凝土力学性能研究()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
42
期数:
2021年02期
页码:
50-54
栏目:
出版日期:
2021-04-12

文章信息/Info

Title:
Study on Mechanical Properties of Polypropylene Fiber Mixed Recycled Aggregate Concrete
作者:
元成方、魏逸然、李爽
郑州大学土木工程学院;深圳大学广东省滨海土木工程耐久性重点实验室;
Author(s):
Yuan Chengfang; Wei Yiran; Li Shuang;
School of Civil Engineering at Zhengzhou University; Key Laboratory of Durability of Binhai Civil Engineering at Shenzhen University;
关键词:
Keywords:
construction waste mixed aggregate recycled aggregate concrete polypropylene fibers mechanical properties X-ray computed tomography
DOI:
10.13705/j.issn.1671-6833.2021.02.001
文献标志码:
A
摘要:
随着城市化进程的不断加快,我国每年都在产生体量巨大的建筑垃圾,同时也在消耗着大量的自然资源,由此带来了严重的资源短缺和环境污染问题。将建筑废弃物中体量最大的混凝土和砖进行资源化利用是解决这一问题的重要途径。基于聚丙烯纤维混合再生骨料混凝土力学性能试验和X射线断层扫描(XCT)试验,深入研究分析了纤维对再生混凝土受压、受拉性能的影响规律与机理。研究表明:聚丙烯纤维掺量对再生混凝土抗压强度的影响规律不显著,纤维掺量0.6kg/m3时,再生混凝土抗压强度略有提高,纤维掺量较高时,再生混凝土的抗压强度有所降低;聚丙烯纤维提高了再生混凝土的受拉性能,纤维掺量1.2kg/m3时,纤维对再生混凝土弯拉性能和劈拉性能的改善效果最佳;XCT分析结果表明,聚丙烯纤维对再生混凝土的力学性能具有正负两方面的效应,在使用时需要考虑纤维的合理掺量,以获得更加优异的性能。
Abstract:
The resource utilization of mixed waste concrete and sintered bricks is an important way to solve the problems of urban construction waste stacking and pollution. Based on the mechanical properties test and X-ray computed tomography (XCT) test of polypropylene fiber mixed recycled aggregate concrete, the influence law and mechanism of fiber on the compression and tensile properties of recycled aggregate concrete were studied in depth. The result showed that when the fiber content is 0.6 kg/m3, the compressive strength of recycled aggregate concrete was slightly increased, and when the fiber content was higher, the compressive strength of recycled aggregate concrete was reduced. Polypropylene fiber improved the tensile properties of recycled aggregate concrete. When the fiber content was 1.2 kg/m3, the fiber had the best improvement effect on the splitting tensile performance and bending tensile properties of recycled aggregate concrete. Polypropylene fiber had both positive and negative effects on the mechanical properties of recycled aggregate concrete. It was necessary to consider the reasonable amount of fiber when using it to obtain more excellent performance.

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更新日期/Last Update: 2021-05-30