橡胶含量和粒径对膨胀土动力性能的影响

IF 2.8 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Geosynthetics International Pub Date : 2023-02-06 DOI:10.1680/jgein.22.00263

Z. Yang, Z. Lu, W. Shi, C. Wang, X. Ling, J. Li, D. Guan

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引用次数: 0

摘要

废橡胶以其重量轻、弹性高、密度低、耐久性好、压缩性高等优点，在岩土工程中得到了广泛的应用。通过低温动三轴试验，研究了橡胶含量（RC）和橡胶粒径（d0）对膨胀土橡胶（ESR）动力性能的影响。结果表明：（1）当RC的粒径比为1.3时，ESR的剪切应力随RC的增加而减小，但当RC的粒度比为2.4时，剪切应力先减小后增大；（2）类土和类橡胶ESR之间的RC阈值为10%；（3） ESR的最大剪切模量比出现在RC=10%和d0=0.25mm时，具有最佳的动态性能；（4） ESR的滞回曲线是平坦的椭圆形，在冻结条件下向右上偏移。此外，还提出了橡胶与膨胀土的不同接触模式，并揭示了其接触机理。

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Investigation of rubber content and size on dynamic properties of expansive soil-rubber

Waste rubber has been widely applied in geotechnical engineering benefiting from its light weight, high elasticity, low density, good durability, and high compressibility. In this paper, the effect of rubber content (RC) and rubber size (d0) on the dynamic properties of expansive soil-rubber (ESR) was investigated by low-temperature dynamic triaxial tests. The results show that: (1) the shear stress of ESR decrease as the increase of RC with the particle size ratio of 1.3, but decrease first and then increase with the particle size ratio of 2.4; (2) the RC threshold between soil-like and rubber-like ESR is 10%; (3) the maximum shear modulus ratio of ESR occurs at RC = 10 % and d0 = 0.25 mm, with the best dynamic performance; (4) hysteretic curve of ESR was flat and elliptical, deviating upward to the right at freezing condition. In addition, different contact modes between rubber and expansive soil are proposed and the contact mechanism has been revealed.

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来源期刊

Geosynthetics International ENGINEERING, GEOLOGICAL-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

6.90

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： An online only, rapid publication journal, Geosynthetics International – an official journal of the International Geosynthetics Society (IGS) – publishes the best information on current geosynthetics technology in research, design innovation, new materials and construction practice. Topics covered The whole of geosynthetic materials (including natural fibre products) such as research, behaviour, performance analysis, testing, design, construction methods, case histories and field experience. Geosynthetics International is received by all members of the IGS as part of their membership, and is published in e-only format six times a year.