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Research Reports

Wear Resistant Pavement Study

Description: This report documents the construction of three special pavement test sections on I-90 east of Spokane, Washington. The test sections included ultra-thin and thin whitetopping, Modified Class D open graded asphalt concrete, and micro/macro
surfacing treatment. The majority of the project was built with a Superpave Class ½ inch mix. The test sections were built to assess their potential as mitigation measures for studded tire wear.

Final results after five plus years of monitoring indicate the micro/macro surfacing has a very short service life, the Modified Class D HMA has a slightly shorter service life than the Superpave Class ½ Inch HMA, and that the whitetopping sections had the longest service life. However, the ultrathin whitetopping (3-inch) failed due to cracking within a very short period. None of the treatments provided a long-term solution for studded tire wear.

Cost/benefit considerations would point to the Superpave Class 1/2 Inch as the most cost effective choice for this section of I-90.

  • Date Published: June, 2009
  • Publication Number: WA-RD 657.2
  • Last Modified: June 13, 2011
  • Authors: Keith W. Anderson, Jeff Uhlmeyer, Mark Russell, Jim Weston.
  • Originator: Washington (State). Dept. of Transportation. Materials Laboratory
  • # of Pages: 122 p., 1.11 mb (PDF)
  • Subject: Paving materials, Materials testing, Tests specific to a material, structure or device, Whitetopping, Asphalt concrete, Wearing course (Pavements), Durability, Surfacing, Studded tires, Rutting, Superpave, Friction.
  • Keywords: Studded tire wear, ultra-thin whitetopping, thin whitetopping, open graded asphalt, micro surfacing, macro surfacing, pavement wear, rutting, friction resistance.
  • Related Publications: Wear Resistant Pavement Study (WA-RD 657.1)


This abstract was last modified July 7, 2011