Repurposing Waste Polyurethane into Cleaner Asphalt Pavement Materials: Laboratory Investigation
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 9
Abstract
With the increasing consumption of polyurethane (PU) products, more and more waste polyurethane (WPU) needs to be handled, resulting in the inefficient utilization of post-consumer PU becoming a key problem in the recycling of waste polymers. Therefore, this paper aims to explore the properties of WPU modified asphalt and assess the feasibility of using WPU materials for asphalt pavement applications. At the same time, the conventional properties, rheological properties, stability, and microscopic properties of the modified asphalt were analyzed. The results show that the rheological properties and permanent deformation resistance of the modified asphalt are improved when the WPU content is increased from 5% to 25%, while the storage stability of the WPU modified asphalt decreases with the WPU content. The optimal amount of WPU modified asphalt is accordingly recommended to be 20%.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The work described in this paper is supported by the Fundamental Research Funds for the Central Universities (B210202040) and the National Natural Science Foundation of China (52278451).
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 30, 2022
Accepted: Feb 9, 2023
Published online: Jun 21, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 21, 2023
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