Book chapter
Challenges for the development and implementation of asphalt mixtures containing recycled waste plastic for pavement surfacing
Roads and Airports Pavement Surface Characteristics, pp.737-747
Symposium on Pavement Surface Characteristics, 9th (Milan, Italy, 12-Sep-2022 - 14-Sep-2022)
CRC Press
2023
Abstract
With the increased focus on recycling of waste materials in infrastructure construction and maintenance, there is an ever-increasing interest in the recycling of waste plastic in the production of asphalt mixtures for road and other pavement surfacing. However, there are many types of plastic and only some are compatible with asphalt production. Some compatible plastics are capable of extending the mineral aggregate in asphalt mixtures, while others can also improve the mixture properties, by increasing the resistance to rutting and cracking. However, the most valuable plastics can extend and improve the bituminous binder in the asphalt mixture, effectively replacing the synthesized polymers that are commonly used to improve moisture resistance, temperature susceptibility, crack resistance and deformation resistance. Despite these potential benefits, there are many challenges associated with the categorization of different plastics and their associated effects, as well as the sourcing of a consistent and uncontaminated plastic supply. Other challenges include the digestion and stability of plastic in the bituminous binder phase when the wet mixing process is used. It is also essential to confirm and demonstrate that asphalt mixtures containing recycled plastic do not increase fume generation during construction, or chemical leachate of road surfaces during service. These challenges must be resolved if the potential for recycling plastic in road and other pavement asphalt layers is to be fully maximised in the future. This paper summarises the potential benefits of waste plastic as an asphalt binder modifier and explores the challenges associated with the implementation of waste plastic as a mature technology in asphalt binder and mixture production. The potential to overcome those challenges is also considered.
Details
- Title
- Challenges for the development and implementation of asphalt mixtures containing recycled waste plastic for pavement surfacing
- Authors
- Greg White (Author) - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringGordon Reid (Author)
- Contributors
- Maurizio Crispino (Editor) - Department of Civil and Environmental Engineering, ItalyToraldo Emanuele (Editor) - Department of Civil and Environmental Engineering, Italy
- Publication details
- Roads and Airports Pavement Surface Characteristics, pp.737-747
- Conference details
- Symposium on Pavement Surface Characteristics, 9th (Milan, Italy, 12-Sep-2022 - 14-Sep-2022)
- Publisher
- CRC Press
- DOI
- 10.1201/9781003429258-72; 10.1201/9781003429258
- ISBN
- 9781003429258
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 99737026902621
- Output Type
- Book chapter
Metrics
27 Record Views