Use of the Superpave Gyratory Compactor as a Predictor of Field Performance of Unbound Material

With continuous and repeated loading of runways and the introduction of larger planes, such as the Boeing-747 and Airbus A380, which weighs approximately 1.3 million pounds, a runway’s ability to resist rutting becomes even more critical. The Federal Aviation Administration (FAA) has been testing airport pavements under heavy aircraft loading with a wander pattern at the National Airport Pavement Test Facility (NAPTF) in order to improve airport pavement design for these heavy planes. The loads and the load wander of these large aircrafts have a dramatic effect on the stability and strength of the unbound aggregate layers because it causes constant particle rearrangement and compaction. In earlier testing cycles of the pavement systems, the subbase layer compacted excessively past the maximum Modified Proctor Density (ASTM D1557) during the simulated trafficking. The densification of this material caused the pavement system to rut. In order to monitor the performance of the runway, stress, strain, deflection, temperature, and other environmental gauges have been placed in the various layers of the pavement. Another problem that has been encountered during the previous construction cycles is moisture migration to the subgrade layer. Moisture migration causes a shear slip plane between the subbase and subgrade layer. The shear failure can increase the rate of deformation in the runway pavement. This study is focused on studying the compaction characteristics of the subbase material during aircraft trafficking using a combination of laboratory tests and field data.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 10p
  • Monograph Title: 2010 FAA Worldwide Airport Technology Transfer Conference: Next Generation of Airport Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01608121
  • Record Type: Publication
  • Files: TRIS, ATRI, USDOT
  • Created Date: Aug 8 2016 9:15AM