Use of Deflection Basin Parameters to Characterize Structural Degradation of Airport Flexible Pavements

The Federal Aviation Administration's (FAA) National Airport Pavement Test Facility (NAPTF) was constructed to generate full-scale testing data to support the investigation of the performance of airport pavements subjected to complex gear loading configurations of new generation aircraft. During the first test program, two gear configurations, a six-wheel dual-tridem landing gear, Boeing 777 (B777), in one lane and a four-wheel dual-tandem landing gear, Boeing 747 (B747), in the other lane were tested simultaneously using the National Airport Test Machine (NAPTM). To monitor the effect of time and traffic on pavement structural responses, Heavy Weight Deflectometer (HWD) tests were conducted on the trafficked lanes and on the untrafficked centerline of flexible test sections as trafficking progressed. Rut depth measurements were made at regular intervals during trafficking. Using the HWD deflection measurements, Deflection Basin Parameters (DBPs) were derived. The potential for using the DBPs to characterize the structural degradation in airport flexible pavements as a result of traffic loading was explored. The DBPs were also used to compare the severity of B777 traffic with that of B747 traffic on the flexible test sections. The trends in DBPs with respect to traffic were compared with rutting trends. The Area Under Pavement Profile (AUPP), Surface Curvature Index (SCI), and the Impulse Stiffness Modulus (ISM) were found to be sensitive to pavement structural degradation under traffic loading. In most cases, the DBPs under B777 and B747 trafficking are comparable indicating similar structural degradation. The DBP trends agree well with the rutting trends.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 1-15
  • Monograph Title: Advances in Pavement Engineering

Subject/Index Terms

Filing Info

  • Accession Number: 01893129
  • Record Type: Publication
  • ISBN: 9780784407769
  • Files: TRIS, ASCE
  • Created Date: Sep 13 2023 10:23AM