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Evaluation of the Resilient Modulus of Hot-Mix Asphalt Made with Recycled Concrete Aggregates from Construction and Demolition Waste

Author

Listed:
  • Juan J. Galan

    (ETSI Caminos, Canales y Puertos, University of A Coruña, Campus de Elviña s/n, 15071 La Coruña, Spain)

  • Luís M. Silva

    (CIETI, ISEP-School of Engineering, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal)

  • Ana R. Pasandín

    (ETSI Caminos, Canales y Puertos, University of A Coruña, Campus de Elviña s/n, 15071 La Coruña, Spain)

  • Ignacio Pérez

    (ETSI Caminos, Canales y Puertos, University of A Coruña, Campus de Elviña s/n, 15071 La Coruña, Spain)

Abstract

This paper reports the influence of the percentage of recycled aggregate (RCA) from construction and demolition waste (C&DW) together with the percentage of binder (L), curing time (t) and temperature (T) of the samples on the stiffness of a hot asphalt mixture. The study was carried out using the response surface methodology (RSM). The resilient modulus was chosen to estimate the stiffness of the mixture. The percentages of RCA studied were 0% (control), 5%, 10%, 20% and 30%, whilst 3.5%, 4% and 4.5% were those chosen for the binder content. Before compacting the samples, they were left into the oven to cure. Curing time, or pretreatment time, were set at 0 (control), 2 and 4 h. The samples were subjected to temperatures of 0, 10 and 20 °C. The natural aggregate is of the hornfels type. All the specimens studied showed high stiffness at low temperatures. According to this research, temperature proved to be the most influential factor on the decrease in the resilient modulus and, conversely, the percentage of recycled aggregate is not a significant factor in the range of values studied.

Suggested Citation

  • Juan J. Galan & Luís M. Silva & Ana R. Pasandín & Ignacio Pérez, 2020. "Evaluation of the Resilient Modulus of Hot-Mix Asphalt Made with Recycled Concrete Aggregates from Construction and Demolition Waste," Sustainability, MDPI, vol. 12(20), pages 1-14, October.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:20:p:8551-:d:428895
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    References listed on IDEAS

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    1. Juan J. Galan & Luís M. Silva & Ignacio Pérez & Ana R. Pasandín, 2019. "Mechanical Behavior of Hot-Mix Asphalt Made with Recycled Concrete Aggregates from Construction and Demolition Waste: A Design of Experiments Approach," Sustainability, MDPI, vol. 11(13), pages 1-12, July.
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    Cited by:

    1. Muhammad Akhtar Tarar & Ammad Hassan Khan & Zia ur Rehman & Wasim Abbass & Ali Ahmed & Elimam Ali & Mohamed Mahmoud Sayed & Mubashir Aziz, 2022. "Evaluation of Resilience Parameters of Soybean Oil-Modified and Unmodified Warm-Mix Asphalts—A Way Forward towards Sustainable Pavements," Sustainability, MDPI, vol. 14(14), pages 1-13, July.

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