Field Evaluation of NDT Devices for Delamination Detection of HMA Airport Pavements

To ensure the desired structural capacity of flexible pavements, sufficient bonding between the hot mix asphalt (HMA) layers is essential. If lack of bonding is present, it may lead to delamination or debonding. This problem is particularly more severe on airfield pavements, due to higher traffic loads applied by aircrafts. Undetected delamination and associated cracks may result in stripping of the lower layers due to moisture intrusion or peeling away of thin lifts from the surface. Moreover, further progression of delamination may develop other dangerous distresses such as foreign object debris (FOD). Rapid nondestructive test (NDT) methods to determine the presence and extent of delamination in asphalt pavements are highly desirable. Previous studies have investigated promising NDT procedures and equipment that have the potential to address the problem. The most promising NDT methods include Ground Penetrating Radar (GPR), seismic methods, mechanical impulse methods and thermography. These methods were previously evaluated on controlled pavement sections specifically constructed to simulate an airfield pavement. The theoretical and practical strength and limitations of these methods were identified and discussed as well. Field evaluation of NDT technologies has not been extensively conducted. The focus of this paper is to present the results of these promising technologies at two major international airports in the US. The objective was to assess capabilities and practicality of selected NDT methods under actual field conditions. Results were also compared with cores retrieved at selected locations. Overall, Impulse Response and ultrasonic surface waves were the most successful methods, followed by the Falling Weight Deflectometer. The most effective methods are too slow and the rapid methods require improvements to their interpretation and analysis algorithms to be suitable for network level implementation.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 16p
  • Monograph Title: 2014 FAA Worldwide Airport Technology Transfer Conference Proceedings: Innovations in Airport Safety and Pavement Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01538334
  • Record Type: Publication
  • Report/Paper Numbers: P10063
  • Files: TRIS, ATRI, USDOT
  • Created Date: Sep 9 2014 7:10AM