Experimental research on the variation characteristics of resistivity of cement-improved soil with changes in load
GAO Tao
SUN Jianjun
LI Shuai
ZHANG Yongzhuang
WU Hongrui
LIU Bingbing
Abstract：To investigate the shear strength and electrical resistivity characteristics of cement-stabilized soil under varying moisture contents,specimens were prepared with moisture contents of 7.7％,9.7％,11.7％,13.7％,15.7％,17.7％,and 19.7％,and a fixed cement content of 8％.Direct shear tests were conducted under vertical pressures of 100,200,300,and 400 kPa to examine the variation patterns of shear strength and resistivity responses under both unconfined and confined conditions.The results indicate that under unconfined conditions,both cohesion and internal friction angle at different moisture contents exhibit quadratic relationships with the initial resistivity.The fitted curves show high coefficients of determination,confirming the feasibility of assessing shear strength based on resistivity measurements.A nearly linear correlation is observed between shear strength and failure resistivity,where shear strength decreases as failure resistivity increases.With increasing vertical pressure,the peak shear stress of the specimens generally increased.As the moisture content increased,the peak shear stress first increased and then decreased.Under confined conditions,both initial and failure resistivity values exhibited negative exponential relationships with moisture content.As the vertical stress increased,the degree of reduction in failure resistivity decreased across different moisture contents.Under different moisture contents,the failure resistivity of the specimen generally decreases with increasing vertical pressure.
Keywords：cement-improved soilelectrical resistivityshear strengthexperimental study
Publication Date：2025-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 106-113 )