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<p>To increase the shear strength of the weak soil, the possible methods for stabilization are through chemically altering the soil’s properties or by adding fibers as a physical stabilization technique. In the current study, lime at its initial lime consumption level (3%) and cement at 3% are added to the soil. To facilitate microreinforcement and restrict the movement of soil particles within the soil, fibers are added. From the compaction curve of low shear strength soil, the unconfined compressive strength (UCS) of soil with the same density (1.8&#xa0;g/cc) and different water content (8.8% and 11.5%) is considered. For the same, synthetic fiber—polypropylene (PP)—is added to the soil at varied percentages (0, 0.25, 0.5, 0.75 and 1%). For both water contents, the optimum percentage of PP is 0.75%. For 8.8% water, it showed a maximum increase in strength by 3.06 times, whereas for 11.5%, there is an average increase in strength by 2.6 times and a maximum increase in strength by 2.94 times. For lime- and cement-stabilized soil, the optimum percentage shifted to 0.5% of PP addition. The presence of PP controlled the occurrence of cracks by developing integrity under shear stress. From the microstructural analysis, it is observed that the presence of PP in the modified soil enhances the interlocking properties, along with the formation of pozzolanic materials.</p>

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Contribution of Synthetic Fibers to the Strength and Mineralogy of Lime and Cement Stabilized Soils

  • 期刊论文

  • 发表日期：

    2026年3月28日

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  • Sivapriya Vijayasimhan,
  • P. Hariharan,
  • M. Ragasanthoshvishagan,
  • S. Karthik

摘要

To increase the shear strength of the weak soil, the possible methods for stabilization are through chemically altering the soil’s properties or by adding fibers as a physical stabilization technique. In the current study, lime at its initial lime consumption level (3%) and cement at 3% are added to the soil. To facilitate microreinforcement and restrict the movement of soil particles within the soil, fibers are added. From the compaction curve of low shear strength soil, the unconfined compressive strength (UCS) of soil with the same density (1.8 g/cc) and different water content (8.8% and 11.5%) is considered. For the same, synthetic fiber—polypropylene (PP)—is added to the soil at varied percentages (0, 0.25, 0.5, 0.75 and 1%). For both water contents, the optimum percentage of PP is 0.75%. For 8.8% water, it showed a maximum increase in strength by 3.06 times, whereas for 11.5%, there is an average increase in strength by 2.6 times and a maximum increase in strength by 2.94 times. For lime- and cement-stabilized soil, the optimum percentage shifted to 0.5% of PP addition. The presence of PP controlled the occurrence of cracks by developing integrity under shear stress. From the microstructural analysis, it is observed that the presence of PP in the modified soil enhances the interlocking properties, along with the formation of pozzolanic materials.