Asphalt Cement Modified with a Pyrolytic Rejuvenator from End-of-Life Tire Mix

Authors

  • Manuel Chávez-Delgado Universidad del Bío-Bío, Laboratorio Materiales (LabMAT)
  • José Concha Universidad del Bío-Bío, Laboratorio Materiales (LabMAT)
  • Luis Arteaga Universidad Andrés Bello, Facultad de Ingeniería
  • José Norambuena Universidad del Bío-Bío, Departamento de Procesos Térmicos y Catalíticos

Keywords:

End Of Life Tires (ELT), Pyrolysis, Asphalt Cement

Abstract

This work demonstrates the potential of pyrolytic liquids (LPN-Mix) obtained from the mix of end-of-life tires from light vehicles (NFU-L) and mining vehicles (NFU-M) as a potential rejuvenator for aged asphalt cements. The study evaluated the effect of different doses of LPN-Mix (3%, 6%, and 12% by total volume of asphalt cement) on the physical properties of asphalt cement at different aging levels. To understand the behavior of LPN-Mix as a rejuvenator, a comprehensive characterization of its physical properties (viscosity, density, pH, and water content) and chemical properties (chemical composition and presence of functional groups with rejuvenating activity) was performed. For each asphalt cement with LPN-Mix, viscosity, softening point, and penetration grade were evaluated. The main results of this study revealed that the physical properties of LPN-Mix are comparable to those of a commercial rejuvenator and that LPN-Mix is mainly composed of hydrocarbons and aromatic substances (92.2%). Additionally, it was determined that mixes with LPN-Mix doses ranging from 3% to 6% showed improvements in viscosity, softening point, and penetration of aged asphalt cements (CA-PAV), restoring their physical properties to the original state of the asphalt cement. Finally, it was evidenced that LPN-Mix could be used as a rejuvenating product for aged asphalts due to its physical and chemical properties, with promising potential in the asphalt industry to enhance the durability and sustainability of asphalt pavements, thus promoting a circular economy.

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Published

2024-12-23 — Updated on 2025-01-07

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How to Cite

Chávez-Delgado, M., Concha , J., Arteaga , L., & Norambuena , J. (2025). Asphalt Cement Modified with a Pyrolytic Rejuvenator from End-of-Life Tire Mix. Journal of Construction and Civil Engineering, 12(3), 1–6. Retrieved from https://rioc.ufro.cl/index.php/rioc/article/view/3369 (Original work published December 23, 2024)

Issue

Vol. 12 No. 3 (2024): RIOC

Section

Articles

License

Copyright (c) 2024 Miguel Chávez , José Concha , Luis Arteaga , José Norambuena

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