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  1. Home
  3. Research Domains
  5. Environmental Sciences
  7. Soil Sciences
  9. Soil Physics
  11. Effect Of Shredded Vehicle Tyres As Microplastics On Stabilization Of A Sandy Soil

Effect of shredded vehicle tyres as microplastics on stabilization of a sandy soil

Hakki O Ozhan1, Abdelrahman Maher Taha Elnemr2

  • 1Dept. of Civil Engineering, Yeditepe Univ, Inonu Mah., Kayisdagi Cad., 326 A, 26 Agustos Yerlesimi, Atasehir, Istanbul, 34755, Turkey. hakki.ozhan@yeditepe.edu.tr.

Environmental Science and Pollution Research International
|May 5, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Adding up to 0.1% tyre microplastics to subbase soil enhances road stability by increasing maximum dry unit weight. Higher concentrations, however, decrease stability, but compaction can still mitigate microplastic scattering.

Area of Science:

  • Geotechnical Engineering
  • Environmental Science
  • Materials Science

Background:

  • Vehicle tyre abrasion is a significant source of soil microplastic contamination.
  • Road subbase soil compaction is crucial for road stability.
  • Tyre microplastics in soil pose environmental challenges.

Purpose of the Study:

  • To investigate the effect of tyre microplastics on the compaction characteristics of subbase soil.
  • To determine the optimal microplastic concentration for enhancing soil stability.
  • To assess the feasibility of using contaminated soil in road construction.

Main Methods:

  • Standard Proctor compaction tests were conducted on well-graded sand mixed with varying percentages of tyre microplastics (0.025% to 2%).
  • Key compaction parameters, including maximum dry unit weight (Ɣdmax) and optimum water content (wopt), were measured.
Keywords:
CompactionContaminationMaximum dry unit weightMicroplastics

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  • The study simulated subbase soil conditions contaminated with microplastics.

    • Main Results:

    • A microplastic concentration of 0.1% increased the maximum dry unit weight by 0.45% and decreased the optimum water content by 1.6%.
    • Higher microplastic concentrations (above 0.1%) led to a decrease in maximum dry unit weight and an increase in optimum water content.
    • Compacting soil with up to 0.1% microplastics improved its stability.

    Conclusions:

    • Compacting tyre microplastic-contaminated subbase soil enhances road stability and can reduce microplastic environmental scattering.
    • A sandy subbase soil contaminated with tyre microplastics can be effectively compacted using smooth wheel rollers.
    • This method offers a practical approach to managing microplastic-contaminated soil in road construction while improving engineering properties.
    Road
    Tyre