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<p>Biopolymers are currently under investigation as supplementary agents for soil stabilization due to the increasing demand for environmentally sustainable solutions. This study aims to evaluate and compare the effectiveness of cellulose and chitosan biopolymers as stabilizing agents for laterite soil. Unconfined compressive strength (UCS), California bearing ratio (CBR), permeability, and compressibility were among the soil’s mechanical properties examined in the laboratory with varying concentrations of chitosan and cellulose. The UCS of untreated soil was measured at 138.29&#xa0;kPa, and it increased by 201% on the 28th day at an optimal cellulose concentration of 3%. Chitosan treatment demonstrated a markedly greater improvement in strength, with UCS reaching 221.78&#xa0;kPa at a 0.30% dosage, representing a 361% increase. The unsoaked and soaked CBR values also exhibited significant improvements, with cellulose demonstrating increases of 123% and 143%, respectively, at a 3% dosage, while chitosan achieved enhancements of 209% and 243% at a 0.30% dosage. Furthermore, a decrease in void ratio from 0.807 to 0.627 for cellulose and from 0.460 for chitosan signifies enhanced soil compaction and decreased permeability. The results exhibit a notable enhancement in the strength and stability of the treated soil, with chitosan demonstrating superior binding capabilities relative to cellulose. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses verified that biopolymer treatment altered the soil’s elemental composition and microstructure, thereby improving particle cohesion and overall structural stability. This study highlights the potential of cellulose and chitosan biopolymers as stabilizing agents for laterite soil, offering an environmentally friendly alternative for geotechnical and construction applications.</p>

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Geotechnical behaviour of laterite soil stabilized with cellulose and chitosan biopolymers: a comparative study

  • 期刊论文

  • 发表日期：

    2026年6月17日

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  • Shailendra Pandurang Banne,
  • Snehal Uttam Bobade,
  • Raviraj Ramesh Sorate,
  • Pratima Kalokhe,
  • Ahmad M. Ebid,
  • Mugdha Kshirsagar

摘要

Biopolymers are currently under investigation as supplementary agents for soil stabilization due to the increasing demand for environmentally sustainable solutions. This study aims to evaluate and compare the effectiveness of cellulose and chitosan biopolymers as stabilizing agents for laterite soil. Unconfined compressive strength (UCS), California bearing ratio (CBR), permeability, and compressibility were among the soil’s mechanical properties examined in the laboratory with varying concentrations of chitosan and cellulose. The UCS of untreated soil was measured at 138.29 kPa, and it increased by 201% on the 28th day at an optimal cellulose concentration of 3%. Chitosan treatment demonstrated a markedly greater improvement in strength, with UCS reaching 221.78 kPa at a 0.30% dosage, representing a 361% increase. The unsoaked and soaked CBR values also exhibited significant improvements, with cellulose demonstrating increases of 123% and 143%, respectively, at a 3% dosage, while chitosan achieved enhancements of 209% and 243% at a 0.30% dosage. Furthermore, a decrease in void ratio from 0.807 to 0.627 for cellulose and from 0.460 for chitosan signifies enhanced soil compaction and decreased permeability. The results exhibit a notable enhancement in the strength and stability of the treated soil, with chitosan demonstrating superior binding capabilities relative to cellulose. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses verified that biopolymer treatment altered the soil’s elemental composition and microstructure, thereby improving particle cohesion and overall structural stability. This study highlights the potential of cellulose and chitosan biopolymers as stabilizing agents for laterite soil, offering an environmentally friendly alternative for geotechnical and construction applications.