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<p>The increasing frequency of rainfall-induced disasters in India has exposed major geotechnical weaknesses, especially in highway embankments, drainage systems, and slope stability across the Himalayan, semi-arid, and flood-prone regions. Conventional deep ground improvement methods such as stone columns and vibro-compaction often fail under severe hydrological stress due to their brittle behavior, low ductility, and reduced performance. This study explores a climate-resilient ground improvement technique: Fiber Reinforced Deep Cement Mixing (FRDCM), which integrates Tuf-Strand SF macro-synthetic fibers into the deep mixing process. The goal is to enhance the mechanical strength, durability, and long-term resilience of treated soils subjected to wetting–drying cycles, fluctuating pore water pressure, and intense precipitation. An experimental program was conducted on soil–cement composites, with and without fiber reinforcement. Key performance metrics included Unconfined Compressive Strength (UCS), Split Tensile Strength (STS), Ultrasonic Pulse Velocity (UPV), and sorptivity, alongside microstructural analysis using SEM and EDS. Results showed that fiber inclusion significantly improved compressive and tensile strength, enhanced ductility, and reduced brittleness. UPV results confirmed a denser, more uniform matrix, while sorptivity tests indicated lower water absorption and improved moisture resistance. SEM–EDS revealed refined pore structures and strong fiber–matrix interlocking. These findings highlight FRDCM as a sustainable, durable solution for stabilizing weak, moisture-sensitive soils in regions prone to rainfall-triggered failures. By improving strength, ductility, and resistance to water ingress, FRDCM offers a promising climate-adaptive approach to modern geotechnical challenges.</p>

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Mechanical and Microstructural Investigation of Fiber-Reinforced Deep Cement Mixed Marine Soil for Strength Enhancement

  • 期刊论文

  • 发表日期：

    2026年3月13日

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  • Pushplata Meena,
  • Neha Shrivastava

摘要

The increasing frequency of rainfall-induced disasters in India has exposed major geotechnical weaknesses, especially in highway embankments, drainage systems, and slope stability across the Himalayan, semi-arid, and flood-prone regions. Conventional deep ground improvement methods such as stone columns and vibro-compaction often fail under severe hydrological stress due to their brittle behavior, low ductility, and reduced performance. This study explores a climate-resilient ground improvement technique: Fiber Reinforced Deep Cement Mixing (FRDCM), which integrates Tuf-Strand SF macro-synthetic fibers into the deep mixing process. The goal is to enhance the mechanical strength, durability, and long-term resilience of treated soils subjected to wetting–drying cycles, fluctuating pore water pressure, and intense precipitation. An experimental program was conducted on soil–cement composites, with and without fiber reinforcement. Key performance metrics included Unconfined Compressive Strength (UCS), Split Tensile Strength (STS), Ultrasonic Pulse Velocity (UPV), and sorptivity, alongside microstructural analysis using SEM and EDS. Results showed that fiber inclusion significantly improved compressive and tensile strength, enhanced ductility, and reduced brittleness. UPV results confirmed a denser, more uniform matrix, while sorptivity tests indicated lower water absorption and improved moisture resistance. SEM–EDS revealed refined pore structures and strong fiber–matrix interlocking. These findings highlight FRDCM as a sustainable, durable solution for stabilizing weak, moisture-sensitive soils in regions prone to rainfall-triggered failures. By improving strength, ductility, and resistance to water ingress, FRDCM offers a promising climate-adaptive approach to modern geotechnical challenges.