Evaluation of Permanent Deformation Model for Asphalt Concrete Mixtures Using Wheel Tracking and Heavy Vehicle Simulator Tests

The objective of this paper was to evaluate and obtain model parameters for a mechanistic-empirical (M-E) permanent strain model for asphalt concrete mixtures. The evaluation was carried out based on the results of two different types of tests (large scale Wheel tracking [WT] and Heavy Vehicle Simulator [HVS]). A total of nine asphalt concrete slabs, three different types of asphalt mixtures and each with three replicas, were prepared for the WT tests. The tests were carried out at several pavement temperatures and tire inflation pressures. The WT tests were simulated as a two layered system in order to estimate the strains in the asphalt slabs. The influence of loading speed was considered through a master curve developed for the three mixes using a frequency sweep cyclic indirect tensile test. A test structure, consisting of mixtures similar to those tested using the WT test, was used for the purpose of verification of the model parameters. The test structure was tested using an HVS facility. Traffic wandering was accounted for during both testing and modeling the asphalt slabs as well as the HVS test structure, and a time hardening approach was applied to accumulate the permanent deformation contributions from different stress levels. The measured permanent deformations in the asphalt slabs were modeled using the permanent strain model from the US Mechanistic-Empirical Pavement Design Guide (MEPDG) and model parameters were estimated for the three types of mixes. Calibration of the model was carried out using permanent deformation measurements of the HVS test structure.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFD40 Full-Scale Accelerated Pavement Testing.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Ahmed, Abubeker W
  • Erlingsson, Sigurdur
• Conference:
  • Transportation Research Board 93rd Annual Meeting
  • Location: Washington DC
  • Date: 2014-1-12 to 2014-1-16
• Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 15p
• Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt mixtures; Deformation; Pavement design; Ruts (Pavements); Strain (Mechanics); Tension tests
• Candidate Terms: Mechanistic-empirical design
• Identifier Terms: Mechanistic-Empirical Pavement Design Guide
• Uncontrolled Terms: Heavy vehicle simulators; Wheel tracking
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01515022
• Record Type: Publication
• Report/Paper Numbers: 14-2498
• Files: TRIS, TRB, ATRI
• Created Date: Feb 21 2014 3:16PM