Effect of Composite Light Stabilizer on the Anti-Ultraviolet Aging Property of Matrix Asphalt
Ultraviolet (UV) radiation causes asphalt aging and thus influences its performance. In this research, a composite light stabilizer was prepared to increase the light stability of matrix asphalt. Benzotriazole UV absorber (UV928), a hindered amine radical scavenger (UV4050), and a light screening agent [layered double hydroxide (LDH)] were selected as light stabilizers to modify the matrix asphalt, and their properties were compared using a physical property test and rheological test before and after UV aging. UV aging and a rolling thin-film oven test (RTFOT) were applied to simulate laboratory accelerated aging. The one-component test results demonstrated that three kinds of light stabilizer improved the light stability of asphalt to some extent. However, before UV aging, the addition of light stabilizer caused a great loss of asphalt fluidity and reduced the low-temperature performance of asphalt, which influenced the original performance of matrix asphalt. Therefore, the composite light stabilizer was prepared to weaken the adverse effect of a single material on asphalt. The composite light stabilizer not only improved the fluidity and the low-temperature crack resistance of one-component modified asphalt. Moreover, from the perspective of high-temperature performance, it also reduced the adverse effects of UV radiation on asphalt. This implied that the composite light stabilizer not only reduced the adverse effects of one-component light stabilizer on asphalt but also ameliorated the light stability of matrix asphalt, and the three kinds of light stabilizer had a good synergistic effect.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
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Supplemental Notes:
- © 2021 American Society of Civil Engineers.
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Authors:
- Qian, Guoping
- Yuan, Guangchen
- Zhang, Dongmei
- Li, Zhijie
- Publication Date: 2021-8
Language
- English
Media Info
- Media Type: Web
- Pagination: 04021176
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Serial:
- Journal of Materials in Civil Engineering
- Volume: 33
- Issue Number: 8
- Publisher: American Society of Civil Engineers
- ISSN: 0899-1561
- EISSN: 1943-5533
- Serial URL: http://ascelibrary.org/journal/jmcee7
Subject/Index Terms
- TRT Terms: Aging (Materials); Physical properties; Rheological properties; Stabilized materials; Stone matrix asphalt; Ultraviolet radiation
- Subject Areas: Highways; Materials; Pavements;
Filing Info
- Accession Number: 01775132
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: Jun 24 2021 4:42PM