Effect of aqueous solution exposure on the long-term aging performance of asphalt

Asphalt pavements are easily exposed to moisture during service. Changes in the properties of asphalt binders during aging may be affected by their solution exposure history. The impact of solution exposure experienced by asphalt in the early stages of service on the long-term aging performance was investigated using three aqueous solutions, including acidic, saline, and alkaline solutions. The surface morphology of the asphalt specimens after solution exposure was recorded and analyzed, while Fourier Transform Infrared Spectroscopy (FTIR), Dynamic Shear Rheometer (DSR), and contact angle test were applied to investigate the effects of solution exposure on the chemical functional groups, rheological properties, and cohesion properties of asphalt after long-term aging. The results showed that the surface roughness of asphalt specimens increased significantly when the solution exposure intensity reached a certain level. Meanwhile, solution exposure not only increased the oxidative aging of asphalt in the short term, but also led to higher degrees of oxidation during long-term aging. In addition, compared with the control group, solution-exposed asphalt was softer and more viscous at high temperatures and more elastic at mid-temperatures after aging, resulting in worse rutting resistance yet slightly better fatigue properties. Furthermore, solution exposure amplified the reduction in surface free energy of the asphalt after aging, and hence the cohesion property became worse.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.139760
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S095006182404902X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Wu, Wenliang
  • Chen, Boji
  • Li, Zhi
• Publication Date: 2025-1-24

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 139760
• Serial:
  • Construction and Building Materials
  • Volume: 460
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Asphalt; Chemical solutions; Cohesion; Material aging; Oxidation; Rheological properties
• Subject Areas: Highways; Maintenance and Preservation; Materials; Pavements;

Filing Info

• Accession Number: 01946727
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 20 2025 4:25PM