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<p>Electrokinetic drying methods, specifically electrokinetic treatment (EKT), have gained prominence in soil stabilization, particularly in clay-rich environments. This study investigates the impact of various parameters, namely, voltage, electrode types, and chemical admixtures, on the effectiveness of EKT in enhancing the shear strength of clay soils through direct simple shear tests. By employing sodium silicate and calcium chloride as chemical injectants, the research aims to explore the interrelationships between the type of electrodes used (aluminum versus Iron), their voltage levels, and the concentration of injected materials on the resulting electroosmotic flow and soil properties. Experimental findings indicate that the type of electrodes significantly influences the electroosmotic flow and shear strength of treated soils. Utilizing iron electrodes demonstrated superior strength enhancements over aluminum electrodes across various configurations. Additionally, increasing the injected material concentration from 5 to 10% correlated with notable improvements in shear strength, revealing the critical role of ionic transfer and electrochemical reactions within the soil matrix. The results underscore that optimal voltage levels (12&#xa0;V and 24&#xa0;V) considerably affect the electroosmotic consolidation process, yielding peak shear strengths 1.6 times greater than untreated samples under specific conditions. This research elucidates the benefits of EKT in soil improvement applications, facilitating better practices for civil engineering projects where soil stability is paramount.</p>

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Evaluation of the Electrokinetic Treatment on the Shear Strength of Clay Soils Using Direct Simple Shear Tests

  • 期刊论文

  • 发表日期：

    2025年9月26日

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  • Ramin Vafaei Poursorkhabi,
  • Ali Zareh

摘要

Electrokinetic drying methods, specifically electrokinetic treatment (EKT), have gained prominence in soil stabilization, particularly in clay-rich environments. This study investigates the impact of various parameters, namely, voltage, electrode types, and chemical admixtures, on the effectiveness of EKT in enhancing the shear strength of clay soils through direct simple shear tests. By employing sodium silicate and calcium chloride as chemical injectants, the research aims to explore the interrelationships between the type of electrodes used (aluminum versus Iron), their voltage levels, and the concentration of injected materials on the resulting electroosmotic flow and soil properties. Experimental findings indicate that the type of electrodes significantly influences the electroosmotic flow and shear strength of treated soils. Utilizing iron electrodes demonstrated superior strength enhancements over aluminum electrodes across various configurations. Additionally, increasing the injected material concentration from 5 to 10% correlated with notable improvements in shear strength, revealing the critical role of ionic transfer and electrochemical reactions within the soil matrix. The results underscore that optimal voltage levels (12 V and 24 V) considerably affect the electroosmotic consolidation process, yielding peak shear strengths 1.6 times greater than untreated samples under specific conditions. This research elucidates the benefits of EKT in soil improvement applications, facilitating better practices for civil engineering projects where soil stability is paramount.