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Research Reports

Rubber Asphalt Binder "Stress Absorbing Membrane Interlayer"

Description: Experimental installations of rubber-asphalt binder stress absorbing membrane interlayers were evaluated for their ability to delay or prevent reflective alligator cracking. The final results are inconclusive in that after 10 years of service life neither the control sections paved without an interlayer or the remainder of the projects paved with the interlayer have shown any reflective alligator cracking. It is suspected that the thickness of the overlay in combination with the sound structure of the underlying pavement has masked any of the benefits of the interlayer.

  • Date Published: March, 1989
  • Publication Number: WA-RD 185.1
  • Last Modified: June 12, 2007
  • Author: R.E. Allison.
  • Originator: Washington State Transportation Center (TRAC)
  • # of Pages: 8 p., 479 KB (PDF)
  • Subject: Alligator cracking, Asphalt rubber, Binders, Energy absorbing materials, Experimental roads, Overlays (Pavements), Prevention, Reflection cracking, Stresses, Thickness.
  • Keywords: Rubber-asphalt, SAMI, stress absorbing membrane interlayers, alligator cracking, reflection cracking, SR 12 Morton to Packwood, SR 12 Jackson Highway to Beach Road.
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This abstract was last modified April 29, 2008