Resistance of Asphalt Mixes with Recycled Materials to Withstand Extreme Temperatures

Reclaimed asphalt pavement (RAP) is increasingly being incorporated into asphalt mixtures for pavement construction and preservation purposes. A study of the climate in the south central states reported an increase in the number of extreme cold days over the past century. Mixtures containing RAP and/or recycled asphalt shingles (RAS) have an increased susceptibility to low-temperature cracking. Unless proper design and performance evaluation tools are in place, the increased occurrence of extreme cold days and diurnal temperature changes, combined with an increase in the use of RAP/RAS mixes, the risk of pavement failure will continue to increase. The objective of the research is to use low-temperature tests on asphalt binders, as well as mortars with and without RAP, as a surrogate to determine the resistance of the asphalt materials to low temperature cracking. A survey of existing pavements will be conducted to identify locations where low-temperature cracking attributed to the use of recycled materials has resulted in premature failure as well as reliable performance. The materials and mixture designs from such sections will be replicated as closely as possible for this study. Field cores will be obtained and standard performance tests will be conducted on selected binders. A low- temperature creep and strength test will be standardized based upon tests recently developed in other research studies. Laboratory test results from selected field mixtures will be used to evaluate and calibrate the laboratory test method. The efficacy of rejuvenators and other remedial measures will be evaluated to determine effect on recycled asphalt pavement durability. The anticipated research deliverable is a user-friendly test method and analysis program that can be used by material and pavement engineers to evaluate cracking resistance of asphalt materials for any pavement cooling scenario (e.g. rapid cooling due to cold front). This will enhance the durability of asphalt mixtures that are increasingly incorporating higher percentages of RAP.

    Language

    • English

    Project

    • Status: Active
    • Funding: $393170.00
    • Contract Numbers:

      DTRT13-G-UTC36

      SPTC 14.1-30

    • Sponsor Organizations:

      Arkansas State Highway and Transportation Department

      Planning and Research Division
      10324 Interstate 30
      Little Rock, Arkansas  United States  72209

      Arkansas State University, State University

      Department of Engineering, P.O. Drawer 1740
      State University, AR  United States  72467-1740

      University of Texas at Austin

      Department of Civil, Architectural and Environmental Engineering
      301 E. Dean Keeton Street
      Austin, Texas  United States  78712

      Pavement Preservation Systems, LLC

      8100 West Marigold Street
      Garden City, Idaho  United States  83714

      Research and Innovative Technology Administration

      University Transportation Centers Program
      1200 New Jersey Avenue
      Washington, DC  United States  20590
    • Performing Organizations:

      Arkansas State University, State University

      Department of Engineering, P.O. Drawer 1740
      State University, AR  United States  72467-1740

      University of Texas at Austin

      Department of Civil, Architectural and Environmental Engineering
      301 E. Dean Keeton Street
      Austin, Texas  United States  78712
    • Principal Investigators:

      Hossain, Zahid

      Bhasin, Amit

    • Start Date: 20140801
    • Expected Completion Date: 0
    • Actual Completion Date: 20160731
    • Source Data: RiP Project 37439

    Subject/Index Terms

    Filing Info

    • Accession Number: 01543053
    • Record Type: Research project
    • Source Agency: Southern Plains Transportation Center
    • Contract Numbers: DTRT13-G-UTC36, SPTC 14.1-30
    • Files: UTC, RiP
    • Created Date: Nov 4 2014 1:00AM