EVALUATION OF ASPHALT STRIPPING TESTS IN OREGON. FINAL REPORT

As part of the continuing effort to establish a standard for evaluating moisture susceptibility of asphalt concrete design mixes, the study evaluated and compared four test methods by testing 15 diverse dense-graded mix designs during Oregon's 1988 construction season. The Index of Retained Strength (IRS), AASHTO T-165, and the Index of Retained Modulus of Resiliency (IRMR), OSHD TM-315, were the existing Oregon Department of Transportation tests compared with the Root-Tunnicliff, NCHRP 274, and the Modified Lottman, AASHTO T-283. None of the four tests predicted the same degree of asphalt stripping across the range of asphalt and aggregate tested. Based on the results of the study, the IRS test method continues to be considered a valid and useful stripping test. The IRMR test appears to have the greatest potential for future improvement. As a result of the test findings, there still is a need for test equipment and procedure improvements to increase the accuracy and precision of the procedures and to improve the correlation between stripping tests.

• Corporate Authors:

  Oregon Department of Transportation

  140 Transportation Building
  Salem, OR  United States  97310

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Dickinson, L L
  • Blachly, A T
  • George, A J
• Publication Date: 1990-3

Media Info

• Pagination: 81 p.

Subject/Index Terms

• TRT Terms: Accuracy; Alternatives analysis; Asphalt concrete; Evaluation; Moisture content; Pavement stripping; Test procedures
• Uncontrolled Terms: Moisture susceptibility
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00600452
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA/TS-90/033, FHWA/OR/RD-90/09
• Contract Numbers: DTFH61-88-C-00083
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 31 1990 12:00AM