Field Aging and Moisture Sensitivity Study

Spurred by recent pilot projects using recycled materials, there are concerns about using performance-based technologies during the asphalt mixture design process. One issue involves testing mixtures to better understand how aging during production and under environmental conditions affects performance. Several methodologies are being used, including aging compacted samples for long periods of time and aging loose-mix samples for short periods. However, it is unclear which type of testing is more representative of asphalt used on roadways. Another concern involves the Hamburg Wheel test, which tests moisture sensitivity to stripping and rutting. This test has shown that finer graded surface mixtures are not performing well; however, field performance shows a low history of rutting and stripping. Testing disparities need to be resolved to achieve conclusive future results. The obbjectives of this study are to: (1) develop laboratory-aging protocols; compare mechanical mixture and recovered binder properties of laboratory conditioned and plant produced mixes; (2) evaluate the effects of binder grade, binder content, and mixture traffic level on laboratory- measured and in-service performance properties; (3) define Hamburg Wheel Tracking Test requirements for laboratory-and-plant produced mixes in an effort to produce similar test results for each; and (4) oversee field construction of test strips, collect samples, and review performance after one winter. Recommendations for changes in mix design specifications, mixture aging procedures, and specification limits for researched testing methods will be made. Also, the Facilities Development Manual, Standard Specifications, Construction and Materials Manual, and any other manuals, as well as special provision or standard special provision language, will be changed to reflect outcomes.


  • English


  • Status: Active
  • Contract Numbers:


  • Sponsor Organizations:

    Wisconsin Department of Transportation

    4802 Sheboygan Avenue
    Madison, WI  United States  53707
  • Project Managers:

    Glidden, Stacy

  • Performing Organizations:

    University of Wisconsin, Madison

    Department of Civil and Environmental Engineering
    1415 Engineering Drive
    Madison, WI  United States  53706
  • Principal Investigators:

    Bahia, Hussain

  • Start Date: 20161020
  • Expected Completion Date: 20180720
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01622252
  • Record Type: Research project
  • Source Agency: Wisconsin Department of Transportation
  • Contract Numbers: 0092-17-04
  • Files: RiP, STATEDOT
  • Created Date: Jan 9 2017 2:23PM