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Mechanical Characteristics and Durability of HMA Made of Recycled Aggregates

Author

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  • Kiran Sapkota

    (Institute for Sustainability Industries and Liveable Cities, Victoria University, Melbourne, VIC 3011, Australia)

  • Ehsan Yaghoubi

    (College of Sport, Health & Engineering, Victoria University, Melbourne, VIC 3011, Australia)

  • P. L. P. Wasantha

    (College of Sport, Health & Engineering, Victoria University, Melbourne, VIC 3011, Australia)

  • Rudi Van Staden

    (College of Sport, Health & Engineering, Victoria University, Melbourne, VIC 3011, Australia)

  • Sam Fragomeni

    (College of Sport, Health & Engineering, Victoria University, Melbourne, VIC 3011, Australia)

Abstract

The application of recycled aggregates in the asphalt industry has been investigated in recent decades. However, low percentages of these materials have practically been used in asphalt mixtures because of the limitations set by the relevant specifications due to their performance uncertainties. This research investigates the feasibility of increasing the percentage of recycled aggregates to 100% in hot mix asphalt (HMA). Recycled concrete aggregate (RCA), recycled glass (RG), and reclaimed asphalt pavement (RAP) were used to develop HMAs suitable for roads with light to medium traffic. First, potential mix designs were proposed using an innovative approach considering the industry’s needs. Next, the volumetric properties, tensile strength, moisture sensitivity and resilient modulus response of the mixtures under different temperature conditions were determined and compared. In general, the proposed recycled material HMA exhibited superior mechanical and resilient modulus performances, i.e., 45 to 145% increase in stiffness, and up to 99% higher in Marshall stability. Furthermore, higher tensile strength ratios of the recycled material mixtures indicated a greater resistance to water damage, and hence greater durability. The findings of this research provide evidence-based insights into the increased proportion of recycled materials in the construction of asphalt pavements, thereby promoting sustainable pavement construction materials.

Suggested Citation

  • Kiran Sapkota & Ehsan Yaghoubi & P. L. P. Wasantha & Rudi Van Staden & Sam Fragomeni, 2023. "Mechanical Characteristics and Durability of HMA Made of Recycled Aggregates," Sustainability, MDPI, vol. 15(6), pages 1-19, March.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:6:p:5594-:d:1104437
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    References listed on IDEAS

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    1. Feng Ma & Aimin Sha & Ruiyu Lin & Yue Huang & Chao Wang, 2016. "Greenhouse Gas Emissions from Asphalt Pavement Construction: A Case Study in China," IJERPH, MDPI, vol. 13(3), pages 1-15, March.
    2. Su, Kai & Hachiya, Yoshitaka & Maekawa, Ryota, 2009. "Study on recycled asphalt concrete for use in surface course in airport pavement," Resources, Conservation & Recycling, Elsevier, vol. 54(1), pages 37-44.
    3. Feng Ma & Aimin Sha & Panpan Yang & Yue Huang, 2016. "The Greenhouse Gas Emission from Portland Cement Concrete Pavement Construction in China," IJERPH, MDPI, vol. 13(7), pages 1-12, June.
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    Cited by:

    1. Kátia Aline Bohn & Liseane Padilha Thives & Luciano Pivoto Specht, 2023. "Physical, Rheological, and Permanent Deformation Behaviors of WMA-RAP Asphalt Binders," Sustainability, MDPI, vol. 15(18), pages 1-21, September.
    2. Diana Movilla-Quesada & Aitor C. Raposeiras & Edgardo Guíñez & Almudena Frechilla-Alonso, 2023. "A Comparative Study of the Effect of Moisture Susceptibility on Polyethylene Terephthalate–Modified Asphalt Mixes under Different Regulatory Procedures," Sustainability, MDPI, vol. 15(19), pages 1-17, October.

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