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This research investigates enhancing black cotton soil for rural road construction by utilizing discarded Reverse Osmosis (RO) membranes as soil reinforcements. Characterized by its expansive nature and structural weakness, black cotton soil presents construction challenges. The study evaluates the potential of RO membranes to improve soil properties and provide a sustainable waste management solution. California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) tests were conducted on soil samples, both reinforced and unreinforced, using configurations named RO Membrane Filter RMF-1 and RMF-2. Results revealed that both RMF-1 and RMF-2 significantly increased the CBR values under soaked and unsoaked conditions, with a single-layer placement at mid-depth enhancing CBR by approximately 30%. A double-layer placement of RMF-1 at one-third height from the top and bottom demonstrated a 17% improvement. UCS tests further confirmed the benefits, with increases ranging from 66 to 102% in UCS values. The findings indicate that discarded RO membranes can effectively serve as geo-reinforcements and separators in soft subgrades, particularly beneficial for black cotton soil. This approach not only improves soil strength for road construction but also addresses environmental concerns related to RO membrane waste, offering a cost-effective method for soil reinforcement and sustainable waste utilization.

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Enhancing Subgrade Stability of Black Cotton Soil Using RO Membrane as Geo-Reinforcement

  • 会议论文

  • 发表日期：

    2025年

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  • Tarun Solanki,
  • Neha Shrivastava,
  • Jagdish Lohar

摘要

This research investigates enhancing black cotton soil for rural road construction by utilizing discarded Reverse Osmosis (RO) membranes as soil reinforcements. Characterized by its expansive nature and structural weakness, black cotton soil presents construction challenges. The study evaluates the potential of RO membranes to improve soil properties and provide a sustainable waste management solution. California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) tests were conducted on soil samples, both reinforced and unreinforced, using configurations named RO Membrane Filter RMF-1 and RMF-2. Results revealed that both RMF-1 and RMF-2 significantly increased the CBR values under soaked and unsoaked conditions, with a single-layer placement at mid-depth enhancing CBR by approximately 30%. A double-layer placement of RMF-1 at one-third height from the top and bottom demonstrated a 17% improvement. UCS tests further confirmed the benefits, with increases ranging from 66 to 102% in UCS values. The findings indicate that discarded RO membranes can effectively serve as geo-reinforcements and separators in soft subgrades, particularly beneficial for black cotton soil. This approach not only improves soil strength for road construction but also addresses environmental concerns related to RO membrane waste, offering a cost-effective method for soil reinforcement and sustainable waste utilization.