土工基础

土工基础 ›› 2020, Vol. 34 ›› Issue (5): 617-620.

• 测试技术 • 上一篇    下一篇

橡胶颗粒对桂林红黏土改良试验研究

庞邦辉1，朱寿增1,2，惠扬磊1    

  1. (1.桂林理工大学土木与建筑工程学院，广西桂林 541004；2.广西岩土力学与工程重点实验室，广西桂林 541004）
  • 收稿日期:2019-09-29 修回日期:2019-10-11 出版日期:2020-10-20 发布日期:2020-11-02
  • 通讯作者: 朱寿增（1963-），男，副教授，研究方向为地基基础工程、地质灾害防治、环境岩土工程与检测等。
  • 作者简介:庞邦辉（1992-），男，在读研究生，研究方向为岩土工程。

Experimental Study on the Improvement of Guilin Red Clay by Rubber Particles

PANG Banghui1, ZHU Shouzeng1,2, HUI Yanglei1   

  1. (1.School of Civil and Architectural Engineering, Guilin University of Technology, Guilin 541004;
    2.Guangxi Key Laboratory of Rock Mechanics and Engineering, Guilin 541004）
  • Received:2019-09-29 Revised:2019-10-11 Online:2020-10-20 Published:2020-11-02

摘要： 为改善桂林红黏土的工程性质和增加废旧轮胎的利用，将0.5 mm、2 mm和4.75 mm粒径的废旧轮胎橡胶颗粒掺入红黏土，进行改良的轻型击实试验和直剪试验研究，分析不同掺入比和不同粒径对红黏土的压实特性、抗剪强度变化的影响，结果表明：随掺入比的增加，最大干密度减小，最优含水率降低；橡胶颗粒掺入比为2%~8%时，抗剪强度增大；0.5 mm橡胶颗粒红黏土抗剪强度增大主要由内摩擦角增大引起的，2 mm橡胶颗粒红黏土抗剪强度增大是由粘聚力和内摩擦角增大引起的，4.75 mm橡胶颗粒红黏土抗剪强度增大主要由粘聚力增大引起的。

关键词: 橡胶颗粒红黏土, 压实特性, 抗剪强度

Abstract: In order to improve the engineering properties of Guilin red clay and to increase the utilization of recycled tires, the lightweight tire rubber particles with grain sizes of 0.5 mm, 2 mm and 4.75 mm were blended into the red clay samples for the improved light compaction test and the direct shear test. The effects of different ratios and different particle sizes on the compaction characteristics and shear strength of the red clay showed that the maximum dry density decreased with the increase of the mixing ratio, and the optimum moisture content decreased. The rubber particle mixing ratio was between 2% and 8%, the shear strength increases; the increase of the shear strength of the rubber particle of 0.5 mm in grain size in the red clay is mainly caused by the increase of internal friction angle. The shear strength of 2 mm rubber particle within the red clay increases by both the cohesion and the internal friction. Caused by the increase of the angle; the increase of the shear strength of the 4.75 mm rubber particle red clay is mainly caused by the increase of cohesion.

Key words: Red Clay with Rubber Particles, Compaction Characteristics, Shear Strength

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