Evaluation on the fatigue and self-healing properties of aged and rejuvenated SBS-modified asphalt

To investigate the fatigue and self-healing properties of aged and rejuvenated SBS-modified asphalt, soybean oil (SBO), epoxidized soybean oil (ESO), and commercial rejuvenators (LBS) were selected as asphalt rejuvenators. The fatigue performance of the asphalt was assessed through a time sweep procedure using a dynamic shear rheometer (DSR) instrument. Subsequently, a series of fatigue-healing-fatigue tests were conducted with varying healing times and damage degrees to analyze the self-healing characteristics of the asphalt. The rejuvenation and self-healing mechanisms were elucidated through a fluorescence microscope, Fourier transform infrared spectroscopy (FTIR), and thin-layer chromatography with flame ionization detection (TLC-FID) tests. The results revealed that the fatigue life of aged SBS asphalt deteriorated by more than 17% compared to unaged asphalt, and the self-healing properties were also weakened. However, both the fatigue life and self-healing properties could be significantly restored through the addition of rejuvenators, with SBO exhibiting the most pronounced effect in their restoration, followed by LBS and ESO. Furthermore, the self-healing capacity of the asphalt was notably affected by both the healing time and damage degree. Microstructure test results showed that in aged SBS-modified asphalt, lighter components dissipated, and the polymer deteriorated, contributing to the decline in self-healing performance. The presence of a substantial quantity of lightweight components in SBO expedited wetting and molecular diffusion at the damaged interface within the asphalt, thereby restoring the self-healing properties of the aged asphalt.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2023.134773
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S095006182304494X
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2023 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Wen, Yalu
  • Ma, Feng
  • 0000-0001-9881-6988
  • Fu, Zhen
  • Li, Chen
  • Dai, Jiasheng
  • Dong, Wenhao
  • Shi, Ke
  • Zhu, Chongxin
• Publication Date: 2024-1-19

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 134773
• Serial:
  • Construction and Building Materials
  • Volume: 412
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Aging (Materials); Mechanical fatigue; Polymer asphalt; Rejuvenators; Repairing; Styrene butadiene styrene
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01908491
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 20 2024 9:15AM