Research on Dynamic Deformation of Nano-SiO<sub>2</sub>-Improved Cement-Soil Under Cyclic Loading and Its Microstructure Analysis

ZHUANG Xinshan; KOU Qiang

doi:10.13204/j.gyjzG21030818

Volume 52 Issue 5

Jul. 2022

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2022 > 52(5): 169-173,218

ZHUANG Xinshan, KOU Qiang. Research on Dynamic Deformation of Nano-SiO2-Improved Cement-Soil Under Cyclic Loading and Its Microstructure Analysis[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 169-173,218. doi: 10.13204/j.gyjzG21030818

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ZHUANG Xinshan, KOU Qiang. Research on Dynamic Deformation of Nano-SiO₂-Improved Cement-Soil Under Cyclic Loading and Its Microstructure Analysis[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(5): 169-173,218. doi: 10.13204/j.gyjzG21030818

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Research on Dynamic Deformation of Nano-SiO₂-Improved Cement-Soil Under Cyclic Loading and Its Microstructure Analysis

doi: 10.13204/j.gyjzG21030818

School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China

Received Date: 2021-03-08
Available Online: 2022-07-23
Publish Date: 2022-07-23

Abstract

Abstract

The dynamic characteristics of nano-SiO₂-improved cement-soil and the change of internal micro-pore structure of nano-SiO₂-improved cement-soil were studied with the dynamic triaxial test apparatus of GDS and the nuclear magnetic resonance test apparatus PQ001.The dynamic triaxial test results showed that theσ_d-ε_d curve of cement-soil first rising and then decline with the increase of the nano-SiO₂ content. The curve of the dynamic deformation modulus and dynamic strain, the area surrounding by the hysteresis curve under the same level load, and the curve for damping ratios and dynamic strain of cement-soil first decline and then rising with the increase of the nano-SiO₂ content. When the nano-SiO₂ content was 2.5%, the dynamic resistance of cement-soil was maximun. Micro structure analysis of cement-soil showed that the pore structure and strength of nano-SiO₂-improved cement-soil were increased. The optimal nano-SiO₂ content was 2.5%.
- cement-soil,
- nano-SiO₂,
- dynamic characteristic test,
- micro structure analysis

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References

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