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Modeling the Compaction Characteristics of Fine-Grained Soils Blended with Tire-Derived Aggregates

Author

Listed:
  • Amin Soltani

    (School of Engineering, IT and Physical Sciences, Federation University, Churchill, VIC 3842, Australia)

  • Mahdieh Azimi

    (School of Engineering and Technology, Central Queensland University, Melbourne, VIC 3000, Australia)

  • Brendan C. O’Kelly

    (Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, D02 PN40 Dublin, Ireland)

Abstract

This study aims at modeling the compaction characteristics of fine-grained soils blended with sand-sized (0.075–4.75 mm) recycled tire-derived aggregates (TDAs). Model development and calibration were performed using a large and diverse database of 100 soil–TDA compaction tests (with the TDA-to-soil dry mass ratio ≤ 30%) assembled from the literature. Following a comprehensive statistical analysis, it is demonstrated that the optimum moisture content (OMC) and maximum dry unit weight (MDUW) for soil–TDA blends (across different soil types, TDA particle sizes and compaction energy levels) can be expressed as universal power functions of the OMC and MDUW of the unamended soil, along with the soil to soil–TDA specific gravity ratio. Employing the Bland–Altman analysis, the 95% upper and lower (water content) agreement limits between the predicted and measured OMC values were, respectively, obtained as +1.09% and −1.23%, both of which can be considered negligible for practical applications. For the MDUW predictions, these limits were calculated as +0.67 and −0.71 kN/m 3 , which (like the OMC) can be deemed acceptable for prediction purposes. Having established the OMC and MDUW of the unamended fine-grained soil, the empirical models proposed in this study offer a practical procedure towards predicting the compaction characteristics of the soil–TDA blends without the hurdles of performing separate laboratory compaction tests, and thus can be employed in practice for preliminary design assessments and/or soil–TDA optimization studies.

Suggested Citation

  • Amin Soltani & Mahdieh Azimi & Brendan C. O’Kelly, 2021. "Modeling the Compaction Characteristics of Fine-Grained Soils Blended with Tire-Derived Aggregates," Sustainability, MDPI, vol. 13(14), pages 1-21, July.
  • Handle: RePEc:gam:jsusta:v:13:y:2021:i:14:p:7737-:d:592383
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    References listed on IDEAS

    as
    1. J. S. Yadav & S. K. Tiwari, 2019. "The impact of end-of-life tires on the mechanical properties of fine-grained soil: A Review," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 21(2), pages 485-568, April.
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    Cited by:

    1. Castorina S. Vieira, 2022. "Sustainability in Geotechnics through the Use of Environmentally Friendly Materials," Sustainability, MDPI, vol. 14(3), pages 1-7, January.

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