Creep Behavior of Hot-Mix Asphalt due to Heavy Vehicular Tire Loading

The aim of this study is to characterize the creep behavior of hot-mix asphalt (HMA) at intermediate (20°C) and at high temperatures (40°C). To accomplish this, a nonlinear time-hardening creep model, characterized through laboratory testing, was incorporated into a 3-D finite-element (FE) model, which was used to calculate permanent creep strains after applying repetitive vehicular loading cycles at the pavement surface. Two different tire configurations were simulated representing a typical dual-tire assembly and a newly introduced wide-base tire (dual-tire: 275/80R22.5 and wide-base tire: 455/55R22.5). Results of the 3-D FE model were successfully verified against pavement response measurements in the field at the Virginia Smart Road. While the elastic or linear viscoelastic FE model may not simulate permanent deformation or shear creep strains after repetitions of vehicular loading, a nonlinear time-hardening creep model could predict primary rutting damage in HMA and shear creep strains at the edge of the tire imprint caused by different tire configurations.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Al-Qadi, Imad L
    • Yoo, Pyeong Jun
    • Elseifi, Mostafa A
    • Nelson, Susan
  • Publication Date: 2009-11

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01144400
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 12 2009 6:48PM