Scholarlink

<p>Reducing the permeability of silt while following to green and low-carbon principles remains a critical challenge in geotechnical engineering. This study systematically investigates the effects of biochar (bamboo biochar and corn stalk biochar) and polypropylene fiber reinforcement on the permeability and microstructure of silt.&#xa0;Laboratory tests reveal that corn stalk biochar significantly reduces permeability at an optimal content of 8% by dry weight of silt through filling pores, refining pore structures and thickening the bound water film.&#xa0;In contrast, bamboo biochar exhibits limited pore-filling capacity, resulting in no substantial permeability reduction. Although polypropylene fibers form a three-dimensional network within the silt, their impact on permeability is negligible compared with that of biochar. Composite modification with biochar and fibers shows no synergistic effect, as the permeability reduction aligns with biochar alone. Microscopic analyses,&#xa0;including scanning electron microscopy (SEM) and mercury intrusion&#xa0;porosimetry&#xa0;(MIP), reveal a direct correlation between reduced pore diameter and optimal biochar content. Based on the Kozeny–Carman equation, a quantitative relationship between microstructural changes and permeability characteristics is established. These findings provide innovative and eco-friendly strategies for sustainable soil improvement.</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

Evaluating the impact of biochar and fibers on the permeability and microstructural characteristics of silt

  • 期刊论文

  • 发表日期：

    2026年6月30日

查看全文
  • Jinmei Dong,
  • Qi Cheng,
  • Yinqiu Xu,
  • Gang Bi,
  • Hongzhong Xu,
  • Qian Zhang

摘要

Reducing the permeability of silt while following to green and low-carbon principles remains a critical challenge in geotechnical engineering. This study systematically investigates the effects of biochar (bamboo biochar and corn stalk biochar) and polypropylene fiber reinforcement on the permeability and microstructure of silt. Laboratory tests reveal that corn stalk biochar significantly reduces permeability at an optimal content of 8% by dry weight of silt through filling pores, refining pore structures and thickening the bound water film. In contrast, bamboo biochar exhibits limited pore-filling capacity, resulting in no substantial permeability reduction. Although polypropylene fibers form a three-dimensional network within the silt, their impact on permeability is negligible compared with that of biochar. Composite modification with biochar and fibers shows no synergistic effect, as the permeability reduction aligns with biochar alone. Microscopic analyses, including scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP), reveal a direct correlation between reduced pore diameter and optimal biochar content. Based on the Kozeny–Carman equation, a quantitative relationship between microstructural changes and permeability characteristics is established. These findings provide innovative and eco-friendly strategies for sustainable soil improvement.