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聚丙烯腈纤维再生混凝土力学性能试验研究

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文中旨在分析聚丙烯腈纤维再生混凝土的力学性能,研究了再生粗骨料替代率(0%~50%)和纤维掺量(0~0.9 kg/m3)对再生混凝土不同龄期下抗压强度和抗折强度的影响.试验结果表明,随着再生粗骨料替代率的增加,混凝土的抗压强度和抗折强度逐渐下降.然而,当混凝土中掺入适量聚丙烯腈纤维时,其力学性能得到显著提升.特别是在纤维掺量为0.8 kg/m3、再生粗骨料替代率为40%时,混凝土表现出最佳的抗压强度和抗折强度,显示出潜在的工程应用价值.研究可为聚丙烯腈纤维再生混凝土配比优化提供理论依据.
EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF POLYACRYLONITRILE FIBER RECYCLED CONCRETE
The mechanical properties of recycled polyacrylonitrile fiber reinforced concrete are analyzed,in which,the effectiveness of recycled coarse aggregate replacement rates(0%to 50%)and fiber content(0 kg/m3 to 0.9 kg/m3)on the compressive strength and flexural strength of recycled concrete at different ages are studied.The experimental results indicate that with an increase in the replacement rate of recycled coarse aggregate,both the compressive strength and flexural strength of the concrete gradually decrease.However,the mechanical properties of the concrete are significantly improved when an appropriate amount of polyacrylonitrile fiber is added.Specifically,when the fi-ber content is 0.8 kg/m3 and the replacement rate of recycled coarse aggregate is 40%,the concrete exhibits optimal compressive and flexural strengths,demonstrating potential engineering applications.The paper provides a theoreti-cal basis for optimizing the mix proportion of recycled polyacrylonitrile fiber reinforced concrete.

polyacrylonitrile fiberrecycled concretemechanical propertiesfiber reinforced concrete

张长胜、沈小琳、寇君淑、杨怡文

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陕西交通控股集团有限公司建设管理分公司,西安 710021

西安工业大学建筑工程学院,西安 710021

青岛地铁集团有限公司第二建设分公司,山东青岛 266000

新疆寰球工程公司,新疆维吾尔自治区 克拉玛依 833600

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聚丙烯腈纤维 再生混凝土 力学性能 纤维混凝土

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(8)