复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (6): 70-75.DOI: 10.19936/j.cnki.2096-8000.20220628.011

• 应用研究 • 上一篇    下一篇

玄武岩-PVA纤维协同增强轻骨料混凝土抗弯拉及抗冲击性能

李成金1, 李静2, 夏锦红3   

  1. 1.新乡学院 土木工程与建筑学院,新乡 453003;
    2.新乡广播电视大学,新乡 453000;
    3.新乡职业技术学院,新乡 453000
  • 收稿日期:2021-08-16 出版日期:2022-06-28 发布日期:2022-07-19
  • 作者简介:李成金(1975-),男,在读博士,高级工程师,主要从事土木工程及项目管理、工程造价方面的研究。
  • 基金资助:
    国家自然科学基金(41472253)

Basalt-PVA fiber synergistically enhances the flexural tensile and impact resistance of lightweight aggregate concrete

LI Cheng-jin1, LI Jing2, XIA Jin-hong3   

  1. 1. Faculty of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China;
    2. Xinxiang University of Broadcast & Television, Xinxiang 453000, China;
    3. Xinxiang Vocational and Technical College, Xinxiang 453000, China
  • Received:2021-08-16 Online:2022-06-28 Published:2022-07-19

摘要: 对混掺玄武岩-PVA纤维轻骨料混凝土进行了抗弯拉强度、抗弯拉弹性模量和抗冲击性能试验,得到了玄武岩-PVA纤维对轻骨料混凝土抗弯拉及抗冲击性能的影响规律。结果表明:混掺纤维材料比单掺纤维材料对提升轻骨料混凝土力学性能效果更佳;玄武岩-PVA纤维掺量为0.6%、混掺比为1∶2时,轻骨料混凝土的抗弯拉强度和抗弯拉弹性模量提升幅度最大,分别较基准组提高了22.19%和23.78%,动态压缩性能试验结果与抗弯拉强度试验结果较为一致;掺量过大时,轻骨料的强度会下降,甚至出现负效应。最后阐述了纤维增强轻骨料混凝土的机理并对其进行了色散谱(Energy Dispersive Spectrometer,EDS)测试分析。

关键词: 玄武岩-PVA纤维, 轻骨料混凝土, 抗弯拉强度, 动态压缩性能, 色散谱, 复合材料

Abstract: The flexural tensile strength, flexural tensile modulus and impact resistance of lightweight aggregate concrete mixed with basalt-PVA fiber were tested, and the effect of basalt-PVA fiber on the flexural tensile and impact resistance of lightweight aggregate concrete was obtained. The results show that fiber-mixed materials are better than fiber-only materials in improving the mechanical properties of lightweight aggregate concrete. When the basalt-PVA fiber content is 0.6% and the blending ratio is 1∶2, the bending resistance of lightweight aggregate concrete, tensile strength and flexural tensile modulus of elasticity have the largest increase, which are 22.19% and 23.78% higher than the benchmark group respectively. The dynamic compression performance test results are more consistent with the flexural tensile strength test results, when the amount is too large the strength of lightweight aggregates will decline, and even have negative effects. Finally, the mechanism of fiber-reinforced lightweight aggregate concrete was described and the Energy Dispersive Spectrometer (EDS) test analysis was carried out.

Key words: basalt-PVA fiber, lightweight aggregate concrete, flexural tensile strength, dynamic compression performance, EDS, composites

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