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<p>The stabilization of black cotton soil, a highly expansive clay, is crucial for addressing its poor load-bearing capacity and pronounced shrink-swell behaviour, which pose challenges in geotechnical engineering. This study investigates the effectiveness of reinforcing black cotton soil with natural jute and synthetic polypropylene (PP) fibres, focusing on enhancing its engineering properties and environmental sustainability. Laboratory tests, including Proctor compaction, unconfined compressive strength (UCS), California bearing ratio (CBR), free swell index (FSI), indirect tensile strength, and direct shear tests, were conducted. Advanced analyses such as scanning electron microscopy (SEM) and X-ray diffraction (XRD) were employed to evaluate microstructural changes due to fibre inclusion. Results indicate that polypropylene fibres enhance UCS by 134% (491.5&#xa0;kPa at 1% content) and reduce FSI by 21.8%, showcasing their superior performance and durability. Jute fibres, being biodegradable, offer a sustainable alternative with a 158% increase in CBR (3.23% at 1% content) and a moderate reduction in FSI by 14.5%. SEM analysis revealed that both fibres mitigate voids and enhance soil structure, while XRD confirmed reduced swelling potential through restricted water penetration into montmorillonite layers. The study highlights the cost-effectiveness of fibre reinforcement, with polypropylene fibres suitable for high-strength, long-term stabilization in critical infrastructure and jute fibres ideal for eco-sensitive, low-cost applications. These findings contribute to the development of sustainable and durable stabilization methods, aligning with global goals for resilient construction practices.</p>

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Enhancement of the Engineering Properties of the Black Cotton Soil by Reinforcement with Jute and Polypropylene Fibres: A Site-Specific Study from Morena District, Madhya Pradesh

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Deepak Dhiman,
  • Rohit Ralli,
  • Raju Sarkar,
  • Shashwata Chatterjee,
  • S. Jayalekshmi

摘要

The stabilization of black cotton soil, a highly expansive clay, is crucial for addressing its poor load-bearing capacity and pronounced shrink-swell behaviour, which pose challenges in geotechnical engineering. This study investigates the effectiveness of reinforcing black cotton soil with natural jute and synthetic polypropylene (PP) fibres, focusing on enhancing its engineering properties and environmental sustainability. Laboratory tests, including Proctor compaction, unconfined compressive strength (UCS), California bearing ratio (CBR), free swell index (FSI), indirect tensile strength, and direct shear tests, were conducted. Advanced analyses such as scanning electron microscopy (SEM) and X-ray diffraction (XRD) were employed to evaluate microstructural changes due to fibre inclusion. Results indicate that polypropylene fibres enhance UCS by 134% (491.5 kPa at 1% content) and reduce FSI by 21.8%, showcasing their superior performance and durability. Jute fibres, being biodegradable, offer a sustainable alternative with a 158% increase in CBR (3.23% at 1% content) and a moderate reduction in FSI by 14.5%. SEM analysis revealed that both fibres mitigate voids and enhance soil structure, while XRD confirmed reduced swelling potential through restricted water penetration into montmorillonite layers. The study highlights the cost-effectiveness of fibre reinforcement, with polypropylene fibres suitable for high-strength, long-term stabilization in critical infrastructure and jute fibres ideal for eco-sensitive, low-cost applications. These findings contribute to the development of sustainable and durable stabilization methods, aligning with global goals for resilient construction practices.