RESEARCH ON MECHANICAL PROPERTIES OF RUBBER-PARTICLE-IMPROVED SOIL CEMENTED BY MICP

WANG Yi; TONG Huawei; QIU Rongkang; YUAN Jie

doi:10.13204/j.gyjzG20062207

Volume 50 Issue 12

Mar. 2021

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WANG Yi, TONG Huawei, QIU Rongkang, YUAN Jie. RESEARCH ON MECHANICAL PROPERTIES OF RUBBER-PARTICLE-IMPROVED SOIL CEMENTED BY MICP[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(12): 8-14,7. doi: 10.13204/j.gyjzG20062207

Citation:

WANG Yi, TONG Huawei, QIU Rongkang, YUAN Jie. RESEARCH ON MECHANICAL PROPERTIES OF RUBBER-PARTICLE-IMPROVED SOIL CEMENTED BY MICP[J]. INDUSTRIAL CONSTRUCTION, 2020, 50(12): 8-14,7. doi: 10.13204/j.gyjzG20062207

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RESEARCH ON MECHANICAL PROPERTIES OF RUBBER-PARTICLE-IMPROVED SOIL CEMENTED BY MICP

doi: 10.13204/j.gyjzG20062207

School of Civil Engineering, Guangzhou University, Guangzhou 510006, China

Received Date: 2020-06-22
Available Online: 2021-03-31

Abstract

Abstract

Microbial-induced calcite precipitation (MICP) can effectively improve the strength of sand, while rubber-particle sand compacted with sandy soil is of low densities, strong elastic deformation capacity, high energy dissipation capacity and low elastic modulus than that of pure sand. Therefore, a method of improving soil combined with rubber particles and the MICP tachnique was proposed. The influence of rubber-particle contents on microbial induced calcium carbonate precipitation was analyzed. Based on the resonant-column test, the effects of rubber contents and confining pressure on dynamic shear modulus and equivalent damping ratios of the mixed soil were compared. The unconfined compressive strength of the mixed soil could be improved when the contents of rubber particles were in a cartain range (about 3%). The confining pressure and the contents of rubber particles were the main factors affecting the dynamic moduli and damping ratios of the soil. The higher the confining pressure, the greater the dynamic modulus and the slower the attenuation of damping ratios, and the smaller the damping ratios; under the constant confining pressure, the higher the rubber contents, the slower the attenuation of the dynamic modulus, and the larger the damping ratios.
- microbial induced carbonate precipitation,
- calcareous sand,
- rubber particle,
- physical property index,
- mechanical properties

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References(26)

References

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