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<p>In this study, the vane shear test and unconfined compression test were performed to investigate influence of in-situ soil properties on the mechanical behavior of cement-treated soils under varying curing conditions. The vane shear test results demonstrated significant differences in undrained shear strength (<i>S</i><sub><i>u</i></sub>) between the two soil layers. Layer 3c, characterized by higher cohesion and lower water content, exhibited a mean <i>S</i><sub><i>u</i></sub> of 69.34 ± 2.52&#xa0;kPa, approximately four times greater than that of layer 3b (18.10 ± 1.66&#xa0;kPa). Regression analyses confirmed a strong linear relationship between <i>S</i><sub><i>u</i></sub> and curing time across both soil layers and water types. Notably, the influence of mixing water type on <i>S</i><sub><i>u</i></sub> was negligible at early curing stages. Furthermore, the unconfined compression tests indicated that higher moisture content and finer particle distribution negatively affected strength gain, whereas coarser particles enhanced the mechanical performance of the treated soils. These findings underscore the necessity of comprehensive geotechnical characterization prior to CDM implementation and highlight the role of intrinsic soil properties in governing treatment efficacy. A deeper understanding of soil–cement interaction mechanisms is essential for advancing the effectiveness and reliability of ground improvement practices using the CDM method.</p>

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Influence of in-situ Soil Properties on the Mechanical Properties of Cement Treated Soft Clay: A Case Study in Vietnam

  • 期刊论文

  • 发表日期：

    2026年2月5日

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  • Van Quang Nguyen,
  • Trung Nghia Phan,
  • Suched Likitlersuang

摘要

In this study, the vane shear test and unconfined compression test were performed to investigate influence of in-situ soil properties on the mechanical behavior of cement-treated soils under varying curing conditions. The vane shear test results demonstrated significant differences in undrained shear strength (Su) between the two soil layers. Layer 3c, characterized by higher cohesion and lower water content, exhibited a mean Su of 69.34 ± 2.52 kPa, approximately four times greater than that of layer 3b (18.10 ± 1.66 kPa). Regression analyses confirmed a strong linear relationship between Su and curing time across both soil layers and water types. Notably, the influence of mixing water type on Su was negligible at early curing stages. Furthermore, the unconfined compression tests indicated that higher moisture content and finer particle distribution negatively affected strength gain, whereas coarser particles enhanced the mechanical performance of the treated soils. These findings underscore the necessity of comprehensive geotechnical characterization prior to CDM implementation and highlight the role of intrinsic soil properties in governing treatment efficacy. A deeper understanding of soil–cement interaction mechanisms is essential for advancing the effectiveness and reliability of ground improvement practices using the CDM method.