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Shear-Torque Fatigue Performance of Geogrid-Reinforced Asphalt Interlayers

Author

Listed:
  • Davide Ragni

    (Department of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy)

  • Francesco Canestrari

    (Department of Civil and Building Engineering and Architecture, Università Politecnica delle Marche, via Brecce Bianche, 60131 Ancona, Italy)

  • Fatima Allou

    (Laboratoire GC2D, Université de Limoges, Bd J. Derche, 19300 Egletons, France)

  • Christophe Petit

    (Laboratoire GC2D, Université de Limoges, Bd J. Derche, 19300 Egletons, France)

  • Anne Millien

    (Laboratoire GC2D, Université de Limoges, Bd J. Derche, 19300 Egletons, France)

Abstract

Interlayer reinforcement systems represent a valid solution to improve performance and extend the service life of asphalt pavements, reducing maintenance costs. The main issue is that the presence of reinforcement may hinder the full transmission of stresses between asphalt layers, reducing the overall pavement bearing capacity. This study aimed at evaluating the mechanical behavior of geogrid-reinforced asphalt interlayers under cyclic shear loading. To this purpose, a trial section, characterized by three types of interface (reinforced with carbon fiber grid, reinforced with glass fiber grid and unreinforced), was built. Cores were taken from the trial section to carry out shear-torque fatigue tests. Static Leutner shear tests were also performed on cored specimens having the same interface configuration. From data gathered in the present study, shear-torque fatigue tests have proved to be a powerful tool for investigating reinforced specimens. Results clearly ranked the investigated materials, showing that the glass fiber grid has the lowest shear fatigue performance in comparison with the other two interfaces at 20 °C. However, the shear fatigue resistance of glass fiber grid increases significantly at 10 °C. Finally, an interesting correlation was found between cyclic and static shear test results that should be better investigated in future studies.

Suggested Citation

  • Davide Ragni & Francesco Canestrari & Fatima Allou & Christophe Petit & Anne Millien, 2020. "Shear-Torque Fatigue Performance of Geogrid-Reinforced Asphalt Interlayers," Sustainability, MDPI, vol. 12(11), pages 1-21, May.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:11:p:4381-:d:363475
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    References listed on IDEAS

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    1. B. Shane Underwood & Zack Guido & Padmini Gudipudi & Yarden Feinberg, 2017. "Increased costs to US pavement infrastructure from future temperature rise," Nature Climate Change, Nature, vol. 7(10), pages 704-707, October.
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