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The study highlights the potential use of discarded RO membranes as geo-reinforcements in soft subgrades, mainly in black cotton soil. This approach can not only help in reducing the waste generated from discarded RO membranes but also in improving the soil properties. The study involved conducting various tests, including CBR and UCS tests, to determine the effectiveness of the RO membranes as reinforcements. The CBR tests were conducted on soil samples with and without RO membrane reinforcements combining various layers of RO in different arrangements. The various combinations of RO membranes were named, (RO Membrane Filter) RMF-1, RMF-2 and (RO membrane Net) RMN-1. The results showed that the soil samples reinforced with RMN-1 had higher CBR values than the unreinforced soil samples in both soaked and unsoaked conditions. A percentage improvement in CBR values of about 76 and 232% was obtained when the RMN-1 was placed in a single layer (CBR = 3%) and in two layers (CBR = 5.65%) respectively in the CBR Mould compared to the unreinforced soil sample (CBR = 1.7%). The UCS tests were also conducted on the soil samples reinforced with RMN-1, and the results indicated that the RO membrane reinforcements significantly increased the UCS values of the soil samples. A percentage improvement in UCS values ranging from 60% to 220% was obtained when RMN-1 was placed at different heights in UCS Soil Mould. Furthermore, the study also investigated the effectiveness of using RO membranes as separators between the subgrade and subbase materials. The results showed that using the RO membrane (RMF-1) as a separator significantly improved the CBR value of the soil sample, and there was no puncture observed in the membrane when placed between the soil and aggregate layer, indicating its effectiveness as a separator. The study suggests that discarded RO membranes can be used as effective geo-reinforcements and separators in soft subgrades, particularly in black cotton soil. Therefore, this study provides insight into sustainable solid waste management practices and cost-effective solutions for soil reinforcement, particularly in pavement construction.

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Study of Pavement Subgrade Enhancement Using Discarded RO Membrane as Geo-Reinforcement

  • 会议论文

  • 发表日期：

    2025年

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  • Ayush Singh,
  • Neha Shrivastava

摘要

The study highlights the potential use of discarded RO membranes as geo-reinforcements in soft subgrades, mainly in black cotton soil. This approach can not only help in reducing the waste generated from discarded RO membranes but also in improving the soil properties. The study involved conducting various tests, including CBR and UCS tests, to determine the effectiveness of the RO membranes as reinforcements. The CBR tests were conducted on soil samples with and without RO membrane reinforcements combining various layers of RO in different arrangements. The various combinations of RO membranes were named, (RO Membrane Filter) RMF-1, RMF-2 and (RO membrane Net) RMN-1. The results showed that the soil samples reinforced with RMN-1 had higher CBR values than the unreinforced soil samples in both soaked and unsoaked conditions. A percentage improvement in CBR values of about 76 and 232% was obtained when the RMN-1 was placed in a single layer (CBR = 3%) and in two layers (CBR = 5.65%) respectively in the CBR Mould compared to the unreinforced soil sample (CBR = 1.7%). The UCS tests were also conducted on the soil samples reinforced with RMN-1, and the results indicated that the RO membrane reinforcements significantly increased the UCS values of the soil samples. A percentage improvement in UCS values ranging from 60% to 220% was obtained when RMN-1 was placed at different heights in UCS Soil Mould. Furthermore, the study also investigated the effectiveness of using RO membranes as separators between the subgrade and subbase materials. The results showed that using the RO membrane (RMF-1) as a separator significantly improved the CBR value of the soil sample, and there was no puncture observed in the membrane when placed between the soil and aggregate layer, indicating its effectiveness as a separator. The study suggests that discarded RO membranes can be used as effective geo-reinforcements and separators in soft subgrades, particularly in black cotton soil. Therefore, this study provides insight into sustainable solid waste management practices and cost-effective solutions for soil reinforcement, particularly in pavement construction.