Exploring an eco-friendly approach to improve soil tensile behavior and cracking resistance

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外文摘要：Soil tensile strength is a critical parameter governing the initiation and propagation of tensile cracking.This study proposes an eco-friendly approach to improve the tensile behavior and crack resistance of clayey soils.To validate the feasibility and efficacy of the proposed approach,direct tensile tests were employed to determine the tensile strength of the compacted soil with different W-OH treatment concentrations and water contents.Desiccation tests were also performed to evaluate the effectiveness of W-OH treatment in enhancing soil tensile cracking resistance.During this period,the effects of W-OH treatment concentration and water content on tensile properties,soil suction and microstructure were investigated.The tensile tests reveal that W-OH treatment has a significant impact on the tensile strength and failure mode of the soil,which not only effectively enhances the tensile strength and failure displacement,but also changes the brittle failure behavior into a more ductile quasi-brittle failure behavior.The suction measurements and mercury intrusion porosimetry(MIP)tests show that W-OH treatment can slightly reduce soil suction by affecting skeleton structure and increasing macropores.Combined with the microstructural analysis,it becomes evident that the significant improvement in soil tensile behavior through W-OH treatment is mainly attributed to the W-OH gel's ability to provide additional binding force for bridging and encapsulating the soil particles.Moreover,desiccation tests demonstrate that W-OH treatment can significantly reduce or even inhibit the formation of soil tensile cracking.With the increase of W-OH treatment concentration,the surface crack ratio and total crack length are significantly reduced.This study enhances a fundamental understanding of eco-polymer impacts on soil mechanical properties and provides valuable insight into their potential application for improving soil crack resistance.

外文关键词：

Clayey soilTensile strengthEco-friendly approachDirect tensile testDesiccation crackingCrack resistance

作者：

Lin Li、Chao-Sheng Tang、Jin-Jian Xu、Yao Wei、Zhi-Hao Dong、Bo Liu、Xi-Ying Zhang、Bin Shi

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作者单位：

School of Earth Sciences and Engineering,Nanjing University,Nanjing,210023,China

School of Civil and Environmental Engineering,Nanyang Technological University,639798,Singapore

Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lake,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Laboratory Cooperation Special Project of Western Cross Team of Western Light,Chinese Academy of Sciences

项目编号：

4192501242230710xbzgzdsys-202107

出版年：

2024

DOI：

10.1016/j.jrmge.2024.01.022

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(10)