Temperature-Induced Fatigue Damage of Asphalt Pavement: Model Development and Evaluation

The recently developed Mechanistic-Empirical Pavement Design Guide (MEPDG, currently known as Pavement ME Design) predicts fatigue performance of Asphalt Concrete (AC) based on traffic-induced tensile strain at the bottom of the AC layer. Thermal strain due to day-night temperature fluctuation is not considered due to the fact that there is no closed-form solution or model available for thermal fatigue damage. This study develops a closed-form equation or model of temperature-induced fatigue damage of AC. To generate data, beam fatigue testing was conducted on three Superpave mixes in the laboratory. The developed model was then used to evaluate fatigue damages of several Long-Term Pavement Performance (LTPP) test sections. Fatigue damage determined by the traditional Pavement ME Design approach (which considers traffic-induced fatigue damage only) is compared to that by the combined traffic- and temperature-induced fatigue. Results show that the error decreases by 31% through the incorporation of temperature-induced fatigue damage in the Pavement ME Design approach. It is therefore suggested to include the developed model in the Pavement ME Design.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFK50 Characteristics of Asphalt Paving Mixtures to Meet Structural Requirements.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Islam, Md Rashadul
  • Tarefder, Rafiqul A
  • Tarefder, Rafiqul A
• Conference:
  • Transportation Research Board 94th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2015-1-11 to 2015-1-15
• Date: 2015

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References;
• Pagination: 15p
• Monograph Title: TRB 94th Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt pavements; Fatigue (Mechanics); Fatigue tests; Mathematical models; Superpave; Temperature; Tension; Test sections
• Identifier Terms: Long-Term Pavement Performance Program; Mechanistic-Empirical Pavement Design Guide
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01553018
• Record Type: Publication
• Report/Paper Numbers: 15-5673
• Files: TRIS, TRB, ATRI
• Created Date: Feb 9 2015 4:31PM