Rutting characteristic analysis of airfield composite pavement based on full-scale accelerated pavement testing and finite element method

Rutting is a typical distress of hot-mix asphalt (HMA) overlay in airfield composite pavement (ACM). An approach that can provides comprehensive and reliable evaluation about ACM rutting characteristics is needed. I n this study, A finite element method (FEM) was developed based on the parameters derived from laboratory and field tests, considering the influential factors: temperatures, dynamic load factors, and pavement structural conditions. The full-scale accelerated pavement testing (APT) was conducted to verify the accuracy of FEM. The tests results revealed a coefficient of deviation that was within 15%, indicating that the FEM exhibited satisfactory accuracy. Additionally, the typical rutting profile shows a non-uniform W-shaped deformation. Especially, temperature variations, driving status and interface bonding conditions influence pavement rutting characteristic significantly, reflected in the significant increase of deformation levels and the changed rutting profile. Aircraft braking and turning will cause a large horizontal displacement on the pavement surface, which may result in severe slippage cracking of asphalt layer. Moreover, all the load levels and overlay thickness have great and steady impacts on pavement rutting deformation. The rutting depth presents a power-function relationship with temperatures and load cycles, and a linear relationship with tire pressures and overlay thickness. The uplift coefficients are stable between 0.26-0.29 with the variation of above factor levels.

Language

  • English

Media Info

  • Media Type: Web
  • Features: Figures; References; Tables;
  • Pagination: 21p

Subject/Index Terms

Filing Info

  • Accession Number: 01763568
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-04328
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:06AM