A design analysis for a medium-thickness asphalt overlay incorporating a thin stress-absorbing membrane interlayer of styrene-butadiene-styrene elastomerasphalt for the rehabilitation of cracked concrete pavements is presented. The study extends the application of this type of membrane from successful road trials of thin overlays to more severe condition--e.g., joint movements of up to 7 mm and airport runway loadings. Finite-element analysis and time-temperature-dependent material properties are used to analyze response and fatigue under diurnal thermal and aircraft dynamic loading in various modes. This shows that resistance to cracking is improved by increasing overlay thickness and stiffness and reducing membrane stiffness. Results were verified by laboratory tests. An 80-mm-thick composite membrane-overlay system featuring an extended interlayer of open-graded asphalt above the membrane is found to satisfy the design requirements and is comparable to a 230-mm-thick conventional overlay for control of crack reflection over a 15-year life. The system is shown to be safe under all aircraft loading conditions.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1-11
  • Monograph Title: Pavement design, performance, and rehabilitation
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00385682
  • Record Type: Publication
  • ISBN: 0309036208
  • Files: TRIS, TRB
  • Created Date: Jul 30 1984 12:00AM