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<p>This study investigates the potential of Sugarcane Bagasse Ash (SCBA), an agricultural byproduct, as a sustainable stabilizer for soils collected from three different locations in Bangladesh. The soil types are inorganic silt (ML), Lean Clay (CL), and Elastic Silt (MH). Index, compaction, and unconfined compression tests were conducted on untreated soil and those treated with 3 – 15% SCBA. The influence of SCBA content and curing time on geotechnical behavior were studied and associated change in the microstructure was observed using Scanning Electron Microscope (SEM). Results showed that moderate SCBA addition (3–6%) reduced plasticity and shrinkage, improved moisture retention, and increased Unconfined Compressive Strength (UCS) up to 40% for silty soil after 16&#xa0;weeks of curing. The micrographs confirmed the formation of cementitious SCBA–silicate–hydrate (SCBA–S–H) and SCBA–aluminate–hydrate (SCBA–A–H) gels that enhanced particle bonding. The observed improvements demonstrate that SCBA can serve as a low-cost and eco-friendly stabilizer for fine-grained soils in Bangladesh.</p>

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Mechanical and Microstructural Behavior of Sugarcane Bagasse Ash–Stabilized Local Soils from Bangladesh

  • 期刊论文

  • 发表日期：

    2025年11月19日

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  • Md. Masudur Rahman,
  • Sarwar Jahan Md. Yasin

摘要

This study investigates the potential of Sugarcane Bagasse Ash (SCBA), an agricultural byproduct, as a sustainable stabilizer for soils collected from three different locations in Bangladesh. The soil types are inorganic silt (ML), Lean Clay (CL), and Elastic Silt (MH). Index, compaction, and unconfined compression tests were conducted on untreated soil and those treated with 3 – 15% SCBA. The influence of SCBA content and curing time on geotechnical behavior were studied and associated change in the microstructure was observed using Scanning Electron Microscope (SEM). Results showed that moderate SCBA addition (3–6%) reduced plasticity and shrinkage, improved moisture retention, and increased Unconfined Compressive Strength (UCS) up to 40% for silty soil after 16 weeks of curing. The micrographs confirmed the formation of cementitious SCBA–silicate–hydrate (SCBA–S–H) and SCBA–aluminate–hydrate (SCBA–A–H) gels that enhanced particle bonding. The observed improvements demonstrate that SCBA can serve as a low-cost and eco-friendly stabilizer for fine-grained soils in Bangladesh.