Towards an Adapted Ovalization System for Flexible Airfield Pavement Interface Characterization Using Rolling-Wheel or HWD Loads

Monitoring pavement condition during its service life is paramount in order to anticipate and optimize the potential maintenance work. For this purpose, different non-destructive techniques (NDT) are used to evaluate the pavement distresses condition and to provide necessary information for the maintenance tasks, but they do not enable, on their own, a reliable assessment of the interface conditions. The ovalization test developed in the 70s by the CEREMA (Centre d’étude et d’expertise sur les risques, l’environnement, la mobilité et l’aménagement) is an interesting method to evaluate the interface bonding condition between pavements layers. It measures the core diameter variation at different depth levels and simultaneity in three horizontal directions (longitudinal (L), transverse (T) and 45° related to the loading direction) over the cross of a rolling wheel loads. The existing ovalization equipment needs to be adapted to test the flexible airfield pavement under rolling and heavy weight deflectometer (HWD) loads. This paper presents two new prototypes for the ovalization device. They are characterized by the simultaneous use of displacement sensors positioned in the three identified horizontal directions previously mentioned and at several depths within the bituminous layer. The first tests performed with this new system under rolling wheel loads, pseudo-static plate loads and HWD dynamic impulse loads at the STAC’s full-scale airfield pavement test facility in Bonneuil (France) are presented. Experimental results are analyzed and compared to 3D finite element simulations.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01880555
  • Record Type: Publication
  • ISBN: 9783030552350
  • Files: TRIS
  • Created Date: Apr 21 2023 9:51AM