Hybrid Reflective-Crack Relief System at Greater Peoria Regional Airport: A Case Study

Reflective cracking continues to be a major contributor to premature deterioration of asphalt overlays. The design methodologies for asphalt overlays are predominantly empirical, hindered by a lack of fundamental understanding of reflective cracking mechanisms and a shortage of validated damage models. This paper describes a comprehensive reflective cracking study involving instrumented field sections, laboratory testing, and advanced numerical modeling techniques. In coordination with the Illinois Division of Aeronautics, a series of test sections were constructed at the Greater Peoria Regional Airport (GPRA) in central Illinois. In particular, a novel high-performance, partial-depth composite patching method was developed for retardation of reflective cracking over an existing pavement with 50 mm wide thermal cracks. A hybrid reflective crack relief system was designed and installed, which involved a combination of a strain tolerant interlayer mixture used in conjunction with a fiberglass reinforcement grid applied in wide strips. Fundamental laboratory tests, including low-temperature creep, strength, and fracture tests were conducted on overlay and interlayer materials. Finite element analyses of field test sections were conducted, including viscoelastic bulk material modeling and cohesive zone fracture modeling. Results of parametric analyses conducted to calibrate the numerical models to measured responses caused by thermal cycling are presented. Field performance data is also presented and compared to historical performance data relating to traditional overlay systems used at GPRA, showing a significant increase in performance for the new hybrid interlayer system. The comprehensive lab, field, and modeling study provides significant new insight towards the mechanisms of reflective cracking in airfield pavements and its mitigation.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 17p
  • Monograph Title: 2010 FAA Worldwide Airport Technology Transfer Conference: Next Generation of Airport Technology

Subject/Index Terms

Filing Info

  • Accession Number: 01608488
  • Record Type: Publication
  • Files: TRIS, ATRI, USDOT
  • Created Date: Aug 7 2016 11:54AM