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<p>This study investigated the mechanical and durability performance of cement-stabilized lateritic soil reinforced with recycled steel fibers recovered from end-of-life tires. The lateritic soil was classified as coarse-grained A-1-a under the AASHTO system and exhibited low plasticity, with a plasticity index of 2.32%. Specimens were prepared using a maximum dry unit weight of 19.14 kN/m<sup>3</sup> and an optimum moisture content of 11.8%. Unconfined compressive strength (UCS) tests were conducted on cement-treated lateritic soil with cement contents of 1–7% under unsoaked and 2&#xa0;h-soaked conditions. A cement content of 3% was selected as a practical baseline mixture for evaluating the reinforcing effect of recycled tire steel fibers, rather than as an absolute optimum cement content. Subsequently, splitting tensile strength and flexural strength were evaluated for fiber contents of 0–5% at curing ages of 7–28&#xa0;days, together with durability assessment under wetting–drying cycles. The results indicate that 3% fiber content provided the most favorable overall mechanical response, increasing the 28-day splitting tensile strength from about 350–481&#xa0;kPa and the flexural strength from about 276–851&#xa0;kPa. The wetting–drying trend suggested that a fiber range of 3–4% provided a suitable balance among strength retention, crack-bridging efficiency, compactability, and constructability. However, excessive fiber addition may reduce reinforcement efficiency because of fiber interlocking, localized clustering, and disturbance of the cement-treated soil matrix. Overall, the findings indicate potential for pavement-layer applications under the tested soil type, 3% cement baseline mixture, fiber range, curing ages, and wetting–drying protocol, subject to field validation.</p>

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Mechanical and Durability Performance of Cement Stabilized Lateritic Soil with Recycled Tire Steel Fibers

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • Siriphat Maneekeaw,
  • Panich Voottipruex,
  • Ittipon Meepon,
  • Piyarat Paoleng,
  • Wilailak Sramoon,
  • Krairoj Mahannopkul

摘要

This study investigated the mechanical and durability performance of cement-stabilized lateritic soil reinforced with recycled steel fibers recovered from end-of-life tires. The lateritic soil was classified as coarse-grained A-1-a under the AASHTO system and exhibited low plasticity, with a plasticity index of 2.32%. Specimens were prepared using a maximum dry unit weight of 19.14 kN/m3 and an optimum moisture content of 11.8%. Unconfined compressive strength (UCS) tests were conducted on cement-treated lateritic soil with cement contents of 1–7% under unsoaked and 2 h-soaked conditions. A cement content of 3% was selected as a practical baseline mixture for evaluating the reinforcing effect of recycled tire steel fibers, rather than as an absolute optimum cement content. Subsequently, splitting tensile strength and flexural strength were evaluated for fiber contents of 0–5% at curing ages of 7–28 days, together with durability assessment under wetting–drying cycles. The results indicate that 3% fiber content provided the most favorable overall mechanical response, increasing the 28-day splitting tensile strength from about 350–481 kPa and the flexural strength from about 276–851 kPa. The wetting–drying trend suggested that a fiber range of 3–4% provided a suitable balance among strength retention, crack-bridging efficiency, compactability, and constructability. However, excessive fiber addition may reduce reinforcement efficiency because of fiber interlocking, localized clustering, and disturbance of the cement-treated soil matrix. Overall, the findings indicate potential for pavement-layer applications under the tested soil type, 3% cement baseline mixture, fiber range, curing ages, and wetting–drying protocol, subject to field validation.