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The subgrade layer is a crucial component in pavement design, influencing its overall performance and durability. This study evaluates the impact of banana fiber reinforcement (0.5, 1, 1.5, and 2%) on the geotechnical properties of silty soil, focusing on its strength, permeability, and durability. Laboratory tests were conducted to assess specific gravity, Atterberg limits, maximum dry density (MDD), optimum moisture content (OMC), unconfined compressive strength (UCS), shear strength, permeability, durability, and California Bearing Ratio (CBR) for both untreated and reinforced soil. The results indicate that banana fiber significantly enhances CBR, UCS, and durability while moderately affecting permeability. IIT Pave was utilized to assess pavement performance based on calculated elastic modulus (Eₛ) and Poisson’s ratio (ν) values. Design involves computing the stress and strain by using IIT Pave software. The findings suggest that banana fiber reinforcement is a cost-effective and sustainable method for improving subgrade soil properties.

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Comparative Study on Soil Subgrade Reinforcement with and Without Banana Fiber

  • 会议论文

  • 发表日期：

    2026年

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  • Dipankar Sarkar,
  • Saswati Banik

摘要

The subgrade layer is a crucial component in pavement design, influencing its overall performance and durability. This study evaluates the impact of banana fiber reinforcement (0.5, 1, 1.5, and 2%) on the geotechnical properties of silty soil, focusing on its strength, permeability, and durability. Laboratory tests were conducted to assess specific gravity, Atterberg limits, maximum dry density (MDD), optimum moisture content (OMC), unconfined compressive strength (UCS), shear strength, permeability, durability, and California Bearing Ratio (CBR) for both untreated and reinforced soil. The results indicate that banana fiber significantly enhances CBR, UCS, and durability while moderately affecting permeability. IIT Pave was utilized to assess pavement performance based on calculated elastic modulus (Eₛ) and Poisson’s ratio (ν) values. Design involves computing the stress and strain by using IIT Pave software. The findings suggest that banana fiber reinforcement is a cost-effective and sustainable method for improving subgrade soil properties.