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<p>The rapid expansion of global infrastructure and escalating land desertification have created urgent demands for sandy soil foundation reinforcement. While conventional methods enhance soil strength, their carbon emissions exacerbate climate deterioration, conflicting with sustainable development goals. As an eco-friendly organic material, glutinous rice slurry shows potential for organic–inorganic synergistic soil enhancement when combined with enzyme-induced carbonate precipitation (EICP) technology, utilizing the high-viscosity colloid formed through amylopectin gelatinization. This study proposes a novel glutinous rice slurry-enhanced EICP (G-EICP) technique to reinforce sandy soils. Through unconfined compressive strength tests, SEM imaging, and CT scanning, the mechanical performance enhancement and reinforcement mechanisms of G-EICP reinforced sand were investigated. Key findings reveal: Under a relative density of 0.6, the soil strength peaked at 519&#xa0;kPa with 15% of slurry volumetric ratio—a 60% improvement over conventional EICP treatment. Glutinous rice slurry can improve crystal efficiency, acting as a template to form a multiphase aggregate with calcium carbonate and soil particles, thereby enhancing soil strength. Porosity exhibits continuous reduction with increasing <i>V</i><sub>G</sub>; the addition of glutinous rice slurry can subdivide large pores into medium pores, increase the number of branched pores, and reduce the coordination number and pore throat length. However, excessive slurry leads to an increase in average pore volume and a decrease in strength. Therefore, the strength of reinforced soil depends not only on total porosity but also on pore size distribution and pore microstructure. This research advances green soil stabilization technologies and provides a foundation for its application in relevant projects.</p>

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Amylopectin-Enhanced EICP in Sand Reinforcement: Strength Improvement and Micro-Mechanisms

  • 期刊论文

  • 发表日期：

    2025年12月11日

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  • Jianye Wang,
  • Xiao Li,
  • Jin Zhang,
  • Shuang Lu,
  • Runfeng Li,
  • Liyun Peng

摘要

The rapid expansion of global infrastructure and escalating land desertification have created urgent demands for sandy soil foundation reinforcement. While conventional methods enhance soil strength, their carbon emissions exacerbate climate deterioration, conflicting with sustainable development goals. As an eco-friendly organic material, glutinous rice slurry shows potential for organic–inorganic synergistic soil enhancement when combined with enzyme-induced carbonate precipitation (EICP) technology, utilizing the high-viscosity colloid formed through amylopectin gelatinization. This study proposes a novel glutinous rice slurry-enhanced EICP (G-EICP) technique to reinforce sandy soils. Through unconfined compressive strength tests, SEM imaging, and CT scanning, the mechanical performance enhancement and reinforcement mechanisms of G-EICP reinforced sand were investigated. Key findings reveal: Under a relative density of 0.6, the soil strength peaked at 519 kPa with 15% of slurry volumetric ratio—a 60% improvement over conventional EICP treatment. Glutinous rice slurry can improve crystal efficiency, acting as a template to form a multiphase aggregate with calcium carbonate and soil particles, thereby enhancing soil strength. Porosity exhibits continuous reduction with increasing VG; the addition of glutinous rice slurry can subdivide large pores into medium pores, increase the number of branched pores, and reduce the coordination number and pore throat length. However, excessive slurry leads to an increase in average pore volume and a decrease in strength. Therefore, the strength of reinforced soil depends not only on total porosity but also on pore size distribution and pore microstructure. This research advances green soil stabilization technologies and provides a foundation for its application in relevant projects.