Characterization of the nonlinear viscoelastic constitutive model of asphalt mixture

Asphalt mixtures are generally considered viscoelastic materials that exhibit time and frequency dependency and have been the subject of numerous studies. However, some studies have shown that the performance of asphalt mixtures changes with the magnitude of stress/strain, which is considered nonlinear viscoelasticity. Concurrently, the accurate establishment of an asphalt mixture constitutive model is the basis of the accurate prediction of the asphalt pavement mechanical response. Hence, the nonlinear viscoelastic constitutive in asphalt mixtures is analyzed and established. First, the uniaxial compressive creep experiment was conducted for three types of asphalt mixtures subjected to 0.1–1.1 MPa. The Schapery, Findley and multiple creep integral models were adopted to characterize the nonlinear viscoelastic performance of asphalt mixtures. The results showed that it was difficult to establish the multiple creep integral model due to its complex kernel function. The processes of establishing the Schapery and Findley models were similar, and the fitting degree of the Schapery model was superior to that of the Findley model. Finally, a Schapery nonlinear viscoelastic model of asphalt mixtures was proposed at 20 and 35 ℃.

• Record URL:
  • https://doi.org/10.1016/j.cscm.2023.e01902
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S2214509523000815
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/22145095
• Supplemental Notes:
  • © 2023 Published by Elsevier Ltd. Abstract reprinted with permission of Elsevier.
• Authors:
  • Chen, Songqiang
  • Xu, Li
  • Jia, Shengqiang
  • Wang, Jinchang
• Publication Date: 2023-7

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: e01902
• Serial:
  • Case Studies in Construction Materials
  • Volume: 18
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 2214-5095
  • Serial URL: http://www.sciencedirect.com/science/journal/22145095

Subject/Index Terms

• TRT Terms: Asphalt mixtures; Asphalt pavements; Compressive strength; Creep properties; Temperature; Uniaxial stress; Viscoelasticity
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 01876170
• Record Type: Publication
• Files: TRIS
• Created Date: Mar 21 2023 9:27AM