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<p>This study investigates the deformation characteristics of silt-lightweight soil reinforced with expanded polystyrene (EPS) beads of varying sizes. Silt-lightweight soil is engineered to address geotechnical challenges in soft ground conditions. A series of laboratory one-dimensional consolidation tests were conducted to evaluate the effects of EPS bead size and cement content on soil deformation behavior under incremental and continuous loading. The results show that EPS particle size significantly influences volumetric deformation. As the EPS particle size increases from 3 to 4&#xa0;mm, the proportion of volume change attributed to EPS deformation decreases from approximately 80% to 60%. This inverse relationship is attributed to the reduction in particle count and contact points with increasing particle size, which limits deformation. Additionally, larger EPS particles result in decreased overall sample strength due to reduced specific surface area, leading to increased soil deformation under equivalent axial stress. The study also emphasizes the role of cement content in enhancing structural integrity. As cement content increases, deformation decreases due to improved bonding between EPS particles and the surrounding soil matrix. This enhanced cohesion restricts EPS displacement during loading and raises the material's yield stress. These findings offer valuable insights for optimizing lightweight soil mixtures in geotechnical engineering applications.</p>

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Investigating the Deformation Characteristics of Silt-Lightweight Soil with Various Sizes of Expanded Polystyrene Beads

  • 期刊论文

  • 发表日期：

    2025年6月28日

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  • Sharafat Ali,
  • Feng Yong,
  • Mudassir Mehmood,
  • Wen Nie,
  • Farhad Jamil

摘要

This study investigates the deformation characteristics of silt-lightweight soil reinforced with expanded polystyrene (EPS) beads of varying sizes. Silt-lightweight soil is engineered to address geotechnical challenges in soft ground conditions. A series of laboratory one-dimensional consolidation tests were conducted to evaluate the effects of EPS bead size and cement content on soil deformation behavior under incremental and continuous loading. The results show that EPS particle size significantly influences volumetric deformation. As the EPS particle size increases from 3 to 4 mm, the proportion of volume change attributed to EPS deformation decreases from approximately 80% to 60%. This inverse relationship is attributed to the reduction in particle count and contact points with increasing particle size, which limits deformation. Additionally, larger EPS particles result in decreased overall sample strength due to reduced specific surface area, leading to increased soil deformation under equivalent axial stress. The study also emphasizes the role of cement content in enhancing structural integrity. As cement content increases, deformation decreases due to improved bonding between EPS particles and the surrounding soil matrix. This enhanced cohesion restricts EPS displacement during loading and raises the material's yield stress. These findings offer valuable insights for optimizing lightweight soil mixtures in geotechnical engineering applications.