Research on Orthogonal Test of MgO-Fiber Cement Soil′s Deformation Modulus

Authors

HU Qizhi, 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, Hubei 430068, China; 2． Hubei Provincial Engineering Technology Research Center for Bridge Safety Monitoring and Equipment, Wuhan, Hubei 430068, ChinaFollow
YU Yang, 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, Hubei 430068, China;
MA Qiang, 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, Hubei 430068, China;
ZHUANG Xinshan, 1. School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, Hubei 430068, China;

Abstract

Appropriate amounts of MgO and fiber can improve the compressive strength of cement soil. In order to further study the mechanical properties of MGO-fiber cement soil, Minitab software was used to design an orthogonal test method, and sensitivity analysis and influence analysis were carried out. The change rules of deformation modulus of MgO content, fiber content, and fiber length were studied at three different levels. The regression equations of MgO content, fiber content, and fiber length with cement soil deformation modulus were obtained by using Matlab software to process the test data. The sample was tested by scanning electron microscope (SEM), and the image was processed by ImageJ software to analyze the change in microstructure. The results show that the degree of influence on the deformation modulus of MGO-fiber cement soil in descending order is MgO content, fiber length, and fiber content. In the test range, the optimum mixture ratio is 1.5% MgO content, 6 mm fiber length, and 0.5% fiber content. The regression equation of the deformation modulus of MGO-fiber cement soil is obtained, and its accuracy is verified. SEM observation and ImageJ software analysis show that the addition of MgO and fiber can improve the pore structure of soil and strengthen the connection between structures, so as to improve the mechanical properties of cement soil.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.034

First Page

183

Last Page

188

Submission Date

May 2025

Recommended Citation

Qizhi, HU; Yang, YU; Qiang, MA; and Xinshan, ZHUANG (2024) "Research on Orthogonal Test of MgO-Fiber Cement Soil′s Deformation Modulus," Journal of China & Foreign Highway: Vol. 42: Iss. 6, Article 34.
DOI: 10.14048/j.issn.1671-2579.2022.06.034
Available at: https://zwgl1980.csust.edu.cn/journal/vol42/iss6/34

Reference

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