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.

• Record URL:
  https://doi.org/10.1061/(ASCE)MT.1943-5533.0003799
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08991561
• Supplemental Notes:
  • © 2021 American Society of Civil Engineers.
• Authors:
  • Qian, Guoping
  • Yuan, Guangchen
  • Zhang, Dongmei
  • Li, Zhijie
• Publication Date: 2021-8

Language

• English

Media Info

• Media Type: Web
• Pagination: 04021176
• 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