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<p>Expansive clay soils present severe challenges in geotechnical engineering due to their swelling and shrinkage behavior. This study investigates the use of graphene oxide (GO), a nanomaterial renowned for its high surface area and functional groups, as a sustainable stabilizer for such soils. Laboratory tests were conducted on clay samples treated with varying GO dosages (0%, 0.1%, 0.5%, and 1.0%) and subjected to compaction, strength, swelling, plasticity, and microstructural analysis (SEM, FTIR, XRD). The results revealed that 0.5% GO achieved a 63% increase in UCS, reduced the free swell index by 50%, and decreased the plasticity index by 50%. Microstructural analyses demonstrated improved particle bonding, chemical interactions, and a reduction in swelling clay minerals. These findings demonstrate the effectiveness of GO as a low-dosage, high-performance stabilizer and advocate its application as a sustainable solution for soil enhancement.</p>

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Advanced Soil Stabilization of Expansive Clays Using Graphene Oxide Nanocomposites

  • 期刊论文

  • 发表日期：

    2025年9月13日

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  • Abdullah A. Al-Homidy,
  • Omar B. Al-Amoudi

摘要

Expansive clay soils present severe challenges in geotechnical engineering due to their swelling and shrinkage behavior. This study investigates the use of graphene oxide (GO), a nanomaterial renowned for its high surface area and functional groups, as a sustainable stabilizer for such soils. Laboratory tests were conducted on clay samples treated with varying GO dosages (0%, 0.1%, 0.5%, and 1.0%) and subjected to compaction, strength, swelling, plasticity, and microstructural analysis (SEM, FTIR, XRD). The results revealed that 0.5% GO achieved a 63% increase in UCS, reduced the free swell index by 50%, and decreased the plasticity index by 50%. Microstructural analyses demonstrated improved particle bonding, chemical interactions, and a reduction in swelling clay minerals. These findings demonstrate the effectiveness of GO as a low-dosage, high-performance stabilizer and advocate its application as a sustainable solution for soil enhancement.