Effects of Polyurethane Thermoplastic Elastomer on Properties of Asphalt Binder and Asphalt Mixture
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 3
Abstract
Polyurethane (PU) is a synthetic material available for researchers to be designed in terms of their demands. This study prepared a novel polyurethane thermoplastic elastomer (PUTE) as an asphalt modifier through the reasonable selection of raw materials and formula. The results of the Fourier transform infrared spectroscopy (FTIR) test confirm the chemical reaction between ─ NCO groups in PUTE prepolymer and ─ OH groups in the most polar asphalt molecules (asphaltenic regions). Effects of the PUTE modifications (1%, 3%, 5%, 7%, 9%, 11%, 13%, and 15% by asphalt binder weight) on the asphalt binder properties were then studied through a series of tests. PUTE is demonstrated to play a positive role in high- and low-temperature properties and the mechanical properties of the asphalt binder. All of the PUTE modified binders have desirable storage stability. Moreover, using 11% PUTE is recommended. Finally, the technical properties of PUTE and SBS modified asphalt mixture were compared. The results indicate that the PUTE modified asphalt mixture performs better in low-temperature property and moisture stability than the SBS modified asphalt mixture, whereas the PUTE modified asphalt mixture has worse high-temperature property than the SBS modified asphalt mixture.
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Data Availability Statement
All of the data, models, and code generated or used during this study appear in the published article.
Acknowledgments
This work was supported by the Shaanxi Provincial Communication Construction Group (No. 17-06K), the National Natural Science Foundation of China (NSFC) (Grant No. 51208043), and the Fundamental Research Funds for the Central Universities of Chang’an University (No. 300102218523).
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 3 • March 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Apr 29, 2020
Accepted: Jul 30, 2020
Published online: Dec 16, 2020
Published in print: Mar 1, 2021
Discussion open until: May 16, 2021
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