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<p>Dispersive clays are more erodible than typical clays due to the high concentration of sodium cations in their pore water. Using eco-friendly materials instead of conventional stabilizers (e.g., lime and cement) may play an important role in reducing energy and natural resource consumption while addressing environmental problems. This research investigated the use of cellulose nanofibers (CNF) and recycled glass powder (RGP) for dispersive soil stabilization. The results indicated that upon adding CNF and RGP compounds to the dispersive soil, dispersion potential decreased considerably. The maximum increase in UCS was observed for the compound with 1.5% CNF and 8% RGP. The UCS of these samples increased by 5.9, 10.4, and 12.5-fold after 7, 14, and 28 days of baking, respectively. XRD analysis showed that relatively strong reflections from CSH gel formed when CNF and RGP were added to the soil. Therefore, the main reason for the increase in sample strength might be the changes in the structure of the divergent soil in response to pozzolanic reactions and the formation of CSH gel. All these have led to denser structure and, ultimately, improved the strength properties of dispersive soil. Also, upon adding CNF and RGP to the soil, the increase in soil particle cohesion (c) and the internal friction angle (ϕ) enhanced shear strength. This increment would enhance the load-bearing capacity of the samples and increase the CBR value.</p>

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Improving geotechnical properties and shear strength of dispersive soil using cellulose nanofibers and recycled glass powder

  • 期刊论文

  • 发表日期：

    2025年12月27日

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  • M. Behboudi,
  • A. A. Zad,
  • M. Yazdi

摘要

Dispersive clays are more erodible than typical clays due to the high concentration of sodium cations in their pore water. Using eco-friendly materials instead of conventional stabilizers (e.g., lime and cement) may play an important role in reducing energy and natural resource consumption while addressing environmental problems. This research investigated the use of cellulose nanofibers (CNF) and recycled glass powder (RGP) for dispersive soil stabilization. The results indicated that upon adding CNF and RGP compounds to the dispersive soil, dispersion potential decreased considerably. The maximum increase in UCS was observed for the compound with 1.5% CNF and 8% RGP. The UCS of these samples increased by 5.9, 10.4, and 12.5-fold after 7, 14, and 28 days of baking, respectively. XRD analysis showed that relatively strong reflections from CSH gel formed when CNF and RGP were added to the soil. Therefore, the main reason for the increase in sample strength might be the changes in the structure of the divergent soil in response to pozzolanic reactions and the formation of CSH gel. All these have led to denser structure and, ultimately, improved the strength properties of dispersive soil. Also, upon adding CNF and RGP to the soil, the increase in soil particle cohesion (c) and the internal friction angle (ϕ) enhanced shear strength. This increment would enhance the load-bearing capacity of the samples and increase the CBR value.