Testing and Evaluation of RAP and RAS on Experimental Pavement Sections

This is a continuation of the research conducted under project 0-6682. Validation of the Maximum Allowable Amounts of Recycled Binder, recycled asphalt pavement (RAP) & recycled asphalt shingles (RAS) Using Accelerated Pavement Testing. In February 2013, 12 flexible pavement test sections were constructed for accelerated pavement testing (APT) through this project using Texas mixes in typical Texas Department of Transportation (TxDOT) pavement structures. Two sections were tested to failure in the period from March 15 to May I, 20l4. APT testing will be conducted on the remaining 10 test sections in order to validate the cracking and rutting potential of both control and RAP and RAS modified mixes. These key issues will be evaluated in this project: (1) Validate that poor results on lab prepared RAP and RAS samples translate to poor field performance under axle loads. Industry groups claim the lab studies do not simulate plant produced mixes; (2) Validate overlay design tools that have recently been developed by Texas A&M Transportation Institute (TTI) to predict mix cracking and rutting of new overlays. These models will be validated and calibrated for RAP and RAS mixes. Having a validated design system will then permit TxDOT designers to predict the performance of mixes containing different RAP and RAS levels for a range of existing pavement types with different pavement structures and different pre-existing cracking levels; and (3) Determine if the proposed balanced mix design procedures, which incorporate both a cracking and rutting evaluation in the lab design phase, can be used to design RAP and RAS mixes with performances comparable to virgin mixes.

Language

  • English

Project

  • Status: Completed
  • Funding: $493931.00
  • Contract Numbers:

    0-6823

  • Sponsor Organizations:

    Texas Department of Transportation

    125 E. 11th Street
    Austin, TX  United States  78701-2483
  • Project Managers:

    Odell, Wade

  • Performing Organizations:

    University of Texas, Arlington

    University Book Store, Office of Research
    Box 19145
    Arlington, TX  United States  76019-0145
  • Principal Investigators:

    Romanoschi, Stefan

  • Start Date: 20140725
  • Expected Completion Date: 0
  • Actual Completion Date: 20150831
  • Source Data: RiP Project 39935

Subject/Index Terms

Filing Info

  • Accession Number: 01567201
  • Record Type: Research project
  • Source Agency: Texas Department of Transportation
  • Contract Numbers: 0-6823
  • Files: RiP, STATEDOT
  • Created Date: Jun 26 2015 1:00AM