Full-Scale Tests of Unbonded PCC Overlays at the FAA’s National Airport Pavement Test Facility

Full-scale tests of unbonded concrete overlays were completed in February 2018 at the Federal Aviation Administration’s (FAA) National Airport Pavement Testing Facility (NAPTF). The objective was to gain full-scale data to improve the FAA’s FAARFIELD design procedure for PCC-on-rigid airport pavement overlays. The overlay experiment of Construction Cycle 8 (CC8) included two test items, each consisting of ten slabs. The north test item was trafficked by a four-wheel (2D) gear configuration, and the south test item by a six-wheel (3D) gear. Underlying slabs had existing damage, but still retained significant structural integrity. A thin asphalt interlayer was used as a bond breaker between two concrete layers. Both concrete layers were instrumented with embedded sensors to measure dynamic (strain and deflection), and static (temperature) pavement responses during trafficking. In contrast to previous Construction Cycle 4 (CC4) test results at the NAPTF, the 2D loaded test item failed earlier than the companion 3D item. The dominant distress types in both test items were corner breaks and linear reflection cracks. Longitudinal cracks were reflected from the doweled longitudinal joints of the underlying PCC slabs. In addition, the observed crack pattern suggests that some transverse cracks may have initiated from the instrumentation channels in the asphalt interlay; however, this remains to be confirmed by post-traffic forensic investigations. Pavement deterioration was characterized using the structural condition index (SCI) and crack density (CD). The rate of SCI deterioration remained nearly constant with coverages, confirming results from previous CC4 tests.

• Record URL:
  • https://doi.org/10.1061/9780784482476.039
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482476
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Ahmed, M U
  • Yin, H
  • Brill, D R
• Conference:
  • International Airfield and Highway Pavements Conference 2019
  • Location: Chicago Illinois, United States
  • Date: 2019-7-21 to 2019-7-24
• Publication Date: 2019-7

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 394-406
• Monograph Title: Airfield and Highway Pavements 2019: Innovation and Sustainability in Highway and Airfield Pavement Technology

Subject/Index Terms

• TRT Terms: Airport runways; Load tests; Overlays (Pavements); Pavement distress; Portland cement concrete
• Identifier Terms: National Airport Pavement Test Facility
• Subject Areas: Aviation; Materials; Pavements;

Filing Info

• Accession Number: 01728634
• Record Type: Publication
• ISBN: 9780784482476
• Files: TRIS, ASCE
• Created Date: Jan 28 2020 9:46AM