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Article

Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism

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Heilongjiang Highway Construction Center, Harbin 150040, China
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Highway Engineering Cost Station of Heilongjiang Province, Harbin 150008, China
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Heilongjiang Longjian Road bridge 5th Engineering Co., Ltd., Harbin 150077, China
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School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
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Section of Pavement Engineering, Faculty of Civil Engineering & Geosciences, Delft University of Technology, 2628CN Delft, The Netherlands
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Institute of Highway Engineering, RWTH Aachen University, 52074 Aachen, Germany
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Authors to whom correspondence should be addressed.
Academic Editor: Antonio D’Andrea
Sustainability 2021, 13(17), 9520; https://0-doi-org.brum.beds.ac.uk/10.3390/su13179520
Received: 28 June 2021 / Revised: 1 August 2021 / Accepted: 18 August 2021 / Published: 24 August 2021
(This article belongs to the Special Issue Sustainable Organic Materials Used in the Construction Sector)
As an environmentally friendly alternative for the production of high-performance modified asphalt by chemical reactions, a liquid-state polyurethane-precursor-based reactive modifier (PRM) was developed and employed in the asphalt modification. In contrast to the traditional solid bitumen modifier, for example, rubber and thermoplastic elastomers, the PRM as a liquid modifier has more significant advantages in reducing energy consumption and improving asphalt performance, which has attracted widespread attention. However, the aging resistance and its mechanism are not clear. In view of this, the aging performance of two PRM-modified bitumen (PRM-70 and PRM-90), under the short-term thermo-oxidative aging, long-term thermo-oxidative aging, and ultraviolet (UV) aging conditions, was investigated through chemical and mechanical methods. The results show that the PRM-90 is more susceptible to the thermos-oxidative aging and UV aging. The use of low-penetration-grade bitumen and ensuring an adequate reaction are beneficial to enhance the aging resistance of PRM-modified bitumen. The impact of aging on high-temperature performance of PRM-modified bitumen is great, followed by the low-temperature performance and the anti-fatigue performance. The mechanic-relevant rheological aging index (RAI) and fracture energy index (FEI) are recommended to evaluate aging properties for PRM-modified bitumen. This study not only provides support for further research on the relationship between the aging properties and mechanical performance of PRM-modified bitumen, but also provides a reference for conducting mechanism analysis. View Full-Text
Keywords: polyurethane precursor; modified bitumen; aging resistance; thermal-oxidation aging; ultraviolet aging polyurethane precursor; modified bitumen; aging resistance; thermal-oxidation aging; ultraviolet aging
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MDPI and ACS Style

Zhang, L.; Li, P.; Hu, G.; Zhang, S.; Hong, B.; Wang, H.; Wang, D.; Oeser, M. Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism. Sustainability 2021, 13, 9520. https://0-doi-org.brum.beds.ac.uk/10.3390/su13179520

AMA Style

Zhang L, Li P, Hu G, Zhang S, Hong B, Wang H, Wang D, Oeser M. Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism. Sustainability. 2021; 13(17):9520. https://0-doi-org.brum.beds.ac.uk/10.3390/su13179520

Chicago/Turabian Style

Zhang, Liang, Pengfei Li, Guanfeng Hu, Sufeng Zhang, Bin Hong, Haopeng Wang, Dawei Wang, and Markus Oeser. 2021. "Study on the Aging Resistance of Polyurethane Precursor Modified Bitumen and its Mechanism" Sustainability 13, no. 17: 9520. https://0-doi-org.brum.beds.ac.uk/10.3390/su13179520

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