Scholarlink

<p>Soft soil features low bearing capacity, high compressibility and poor water stability, threatening infrastructure safety. Ionic soil stabilizers are eco-friendly alternatives to traditional cement or lime but face prolonged setting time, dependence on auxiliary materials and insufficient durability research. This study developed a high-efficiency sodium silicate-based ionic soil stabilizer with ethylene glycol diacetate as hardener, Tween 40 as emulsifier, sulfonated oil as surfactant and polyanionic cellulose as toughener. The Box-Behnken design under response surface methodology optimized formulation, with 7-day and 28-day unconfined compressive strength as response targets. Mechanical tests explored effects of stabilizer dilution ratio, soil moisture content and dosage on unconfined compressive strength, while durability was evaluated via wet-dry cycles, sulfate erosion and water stability tests; curing mechanism was clarified by chemical analysis and interface characterization. Results showed the optimized stabilizer eliminated auxiliary materials, achieving 7-day and 28-day unconfined compressive strength of 3.35&#xa0;MPa and 4.28&#xa0;MPa for low-liquid-limit silty clay, 50% to 90% higher than conventional ones. Unconfined compressive strength decreased with dilution ratio and moisture content but increased with dosage. Specimens with 30% dosage showed 45.5% strength loss after 15 wet-dry cycles, 11.4% loss after 28&#xa0;days in 5% Na₂SO₄, and 28-day water stability coefficient of 92%. Core mechanism involves sodium silicate condensation forming pore-filling gels and sulfonated oil ion exchange forming hydrophobic layers. This study provides a high-performance, low-cost and eco-friendly solution for soft soil improvement, advancing green soil stabilization technology.</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

High-efficiency sodium silicate-based ISS for soft soil improvement: formulation optimization and performance evaluation

  • 期刊论文

  • 发表日期：

    2026年6月16日

查看全文
  • Jinsheng Lei,
  • Xiaoyu Shi,
  • Xinghua Chen,
  • Badal Hossain

摘要

Soft soil features low bearing capacity, high compressibility and poor water stability, threatening infrastructure safety. Ionic soil stabilizers are eco-friendly alternatives to traditional cement or lime but face prolonged setting time, dependence on auxiliary materials and insufficient durability research. This study developed a high-efficiency sodium silicate-based ionic soil stabilizer with ethylene glycol diacetate as hardener, Tween 40 as emulsifier, sulfonated oil as surfactant and polyanionic cellulose as toughener. The Box-Behnken design under response surface methodology optimized formulation, with 7-day and 28-day unconfined compressive strength as response targets. Mechanical tests explored effects of stabilizer dilution ratio, soil moisture content and dosage on unconfined compressive strength, while durability was evaluated via wet-dry cycles, sulfate erosion and water stability tests; curing mechanism was clarified by chemical analysis and interface characterization. Results showed the optimized stabilizer eliminated auxiliary materials, achieving 7-day and 28-day unconfined compressive strength of 3.35 MPa and 4.28 MPa for low-liquid-limit silty clay, 50% to 90% higher than conventional ones. Unconfined compressive strength decreased with dilution ratio and moisture content but increased with dosage. Specimens with 30% dosage showed 45.5% strength loss after 15 wet-dry cycles, 11.4% loss after 28 days in 5% Na₂SO₄, and 28-day water stability coefficient of 92%. Core mechanism involves sodium silicate condensation forming pore-filling gels and sulfonated oil ion exchange forming hydrophobic layers. This study provides a high-performance, low-cost and eco-friendly solution for soft soil improvement, advancing green soil stabilization technology.