Laboratory evaluation of performances and thermo-oxidative aging characteristics of high-viscosity modified asphalt

High construction temperatures and complex application conditions make the high-viscosity modified asphalt (HVMA) susceptible to aging. This work presents a comprehensive investigation of the performances and thermo-oxidative aging characteristics of HVMA. Fistly, an instant high-viscosity modifier (HVM) was synthesized and then optimized by entropy weight method. The modification mechanism and high- and low-temperature performances of HVMAs were investigated by the Fourier transform infrared spectroscopy (FTIR), temperature sweep, and low temperature creep tests. Besides, thermo-oxidative aging characteristics were evaluated by the frequency sweep, multiple stress creep recovery (MSCR) and fluorescence microscopy (FM) tests. Results shows that the recommended formulation of instant HVMA (HVMA-I) was 12 % instant HVM and 0.2 % stabilizer. Grafting and cross-linking reactions involved in HVMA-I, thus ensuring the excellent high- and low-temperature performances. The thermo-oxidative aging of HVMA consisted of the modifier degradation and the binder oxidation. Short-term aging produced a marginal effect as a fluctuating change direction for complex modulus. Long-term aging had pronounced effects on the performances of HVMA. At the macroscopic level, the complex modulus was increased and the nonrecoverable creep compliance was decreased; at the microscopic level, the fluorescence area was reduced and phase network was degraded.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.137574
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061824027168
• 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:
  • Liu, Yue
  • Yin, Peng
  • Liu, Tao
  • Pan, Baofeng
  • 0000-0002-6339-7442
  • Qin, Yang
• Publication Date: 2024-8-30

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 137574
• Serial:
  • Construction and Building Materials
  • Volume: 441
  • 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); Asphalt; Laboratory tests; Oxidation; Performance tests; Viscosity
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01927191
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 14 2024 9:49AM