Linking Granular Base/Subbase Residual Deformations in NAPTF Pavement Test Sections to Transverse Rut Profiles

This paper presents findings from a recent research study focused on the analysis of the behavior of unbound aggregates to offset wheel loads at the Federal Aviation Administration's (FAA’s) Center of Excellence for Airport Technology (CEAT) established at the University of Illinois. Test data from full-scale aircraft gear loading conducted at the FAA’s National Airport Pavement Test Facility (NAPTF) were used to investigate the effects of wander (offset loads) on the deformation behavior of unbound aggregate layers in asphalt pavement test sections. The overall objective was to develop a better understanding of the complex rebound (recovered) and residual (unrecovered) deformation trends of granular materials due to passing of each of the 6-wheel B777 type and the 4-wheel B747 type gears for various combinations of applied load magnitudes and loading sequences (stress history effects), traffic directions, and wander positions and sequences. The NAPTF rutting performance data for the CC1 flexible pavement test sections were gathered for transverse pavement surface profiles and the individual deformations in the P209/P154 granular base/subbase layers indicated by the Multi-Depth Deflectometer (MDD) data. The unique analyses of the MDD data pioneered the use of critical transverse profile points and critical point multiplication factors to calculate individual pass residual transverse profiles. It then combined the individual profiles through an entire wander pattern to simulate the actual applied traffic on NAPTF sections and determine the creation of the residual deformation basin and the final transverse profile.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 16p
  • Monograph Title: 2010 FAA Worldwide Airport Technology Transfer Conference: Next Generation of Airport Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01608314
  • Record Type: Publication
  • Files: TRIS, ATRI, USDOT
  • Created Date: Aug 6 2016 11:40AM