Consolidated Undrained Shear Test of Polypropylene Fiber Reinforced Rubber Sand

被引：0
|
作者：
Zhang J. [1 ]
Wang S. [1 ]
Zhuang H. [1 ]
Chen J. [2 ]
Lan J. [1 ]
机构：
[1] School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang
[2] Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2024年 / 27卷 / 05期
关键词：
consolidated undrained shear test; failure mode; polypropylene fiber; rubber sand; shear strength;
D O I：
10.3969/j.issn.1007-9629.2024.05.012
中图分类号：
学科分类号：
摘要：
Considering the low bearing capacity and large deformation of rubber sand as backfill material，a method involving the addition of polypropylene fibers（PPF）to rubber sand was employed to enhance its mechanical performance. A semi‑dry mixing method for preparing polypropylene PPF reinforced rubber sand was proposed. Through 48 sets of consolidated undrained shear tests on PPF reinforced rubber sand，ordinary rubber sand，and pure sand samples，the influence of parameters such as PPF content and rubber content on the main mechanical deformation characteristics of PPF reinforced rubber sand was investigated. The results indicate that PPF fibers have a relatively small impact on the elastic modulus of rubber sand. PPF reinforced rubber sand exhibits a characteristic failure pattern of initial shear contraction followed by shear dilation，with a strain‑hardening relationship between shear stress and axial strain. PPF fibers effectively enhance the internal friction angle and cohesion of rubber sand. The improvement in the failure shear stress of PPF reinforced rubber sand is significant with a maximum increase of up to three times. © 2024 Tongji University. All rights reserved.
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页码：471 / 478
页数：7
相关论文
共 17 条
  • [1] EDIL T B, BOSSCHER P J., Engineering properties of tire chips and soil mixtures［J］, Geotechnical Testing Journal, 17, 4, (1994)
  • [2] ZHOU E Q，, ZONG Z X., Applicability of waste rubber particles as buried pipe backfill material［J］, KSCE Journal of Civil Engineering, 25, 5, (2021)
  • [3] WEN Xuejun, YANG Qun, Research on vibration and noise reduction pavement with coarse waste tire rubber granule SMA mixture［J］, Journal of Building Materials, 11, 2, (2008)
  • [4] ZHUANG Haiyang, LIU Qifei, WU Qi, Et al., Kinetic properties of saturated rubber particle‑sand mixtures［J］, Journal of Building Materials, 24, 3, (2021)
  • [5] ZHOU Enquan, ZHANG Jianghao, CUI Lei, Et al., Compaction and dynamic deformation characteristics of rubber‑powdered lightweight hybrid soil ［J］, Journal of Building Materials, 24, 6, (2021)
  • [6] MEHRJARDI G T, TAFRESHI S N M, DAWSON A R., Combined use of geocell reinforcement and rubber‑soil mixtures to improve performance of buried pipes［J］, Geotextiles and Geomembranes, 34, (2012)
  • [7] LIU Fangcheng, WU Mengtao, CHEN Julong, Et al., Experimental study on the effect of geocell reinforcement on the dynamic properties of rubber sand［J］, Journal of Geotechnical Engineering, 39, 9, (2017)
  • [8] DHANYA J S，, BOOMINATHAN A，, BANERJEE S., Performance of geo‑base isolation system with geogrid reinforcement［J］, International Journal of Geomechanics, 19, 7, (2019)
  • [9] LIU Fangcheng, WU Mengtao, JING Liping, Experimental study on the seismic isolation performance of reinforced rubber sand composite bedding［J］, Vibration and Shock, 38, 22, (2019)
  • [10] CHEN Julong, Large‑scale cyclic single‑shear experimental study on the dynamic properties of geobag reinforced rubber sand［D］, (2017)
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