Scholarlink

<p>High-water-content dredged clay poses significant engineering challenges due to its high compressibility, low shear strength, and excessive porosity, limiting its direct reuse in construction. This study investigates the mechanical and microstructural behavior of dredged clay stabilized with 10% cement and varying sodium silicate (0-12%) contents under curing periods of 3&#xa0;h, 7 d, and 28 d. Direct shear and unconfined compressive strength (UCS) tests were conducted, supported by scanning electron microscopy analysis. Results reveal a non-linear relationship between sodium silicate dosage and strength development, with 6% identified as the optimal content. At 28&#xa0;days, UCS reached 2445.5&#xa0;kPa, accompanied by significant increases in shear strength, cohesion, and internal friction angle. Microstructural observations confirmed that synergistic formation of (N)-C-S-H and N-C-A-S-H gels produced a denser matrix and reduced porosity. Excess sodium silicate reduced efficiency due to hydration imbalance. The findings demonstrate an effective approach for sustainable stabilization and reuse of dredged clay.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanical Performance and Microstructural Evolution of Cement-Sodium Silicate Treated Dredged Clay for Sustainable Applications

  • 期刊论文

  • 发表日期：

    2026年5月19日

查看全文
  • Hesham Noureldin,
  • Chenwei Wang,
  • Lei Zheng,
  • Zhehao Qiu,
  • Jianhua Wang,
  • Jie Yin

摘要

High-water-content dredged clay poses significant engineering challenges due to its high compressibility, low shear strength, and excessive porosity, limiting its direct reuse in construction. This study investigates the mechanical and microstructural behavior of dredged clay stabilized with 10% cement and varying sodium silicate (0-12%) contents under curing periods of 3 h, 7 d, and 28 d. Direct shear and unconfined compressive strength (UCS) tests were conducted, supported by scanning electron microscopy analysis. Results reveal a non-linear relationship between sodium silicate dosage and strength development, with 6% identified as the optimal content. At 28 days, UCS reached 2445.5 kPa, accompanied by significant increases in shear strength, cohesion, and internal friction angle. Microstructural observations confirmed that synergistic formation of (N)-C-S-H and N-C-A-S-H gels produced a denser matrix and reduced porosity. Excess sodium silicate reduced efficiency due to hydration imbalance. The findings demonstrate an effective approach for sustainable stabilization and reuse of dredged clay.