Performance Evaluation of Full Depth Reclaimed (FDR) Pavements In Tennessee

A detailed research study is being proposed by University of Tennessee at Chattanooga (UTC) in collaboration with Middle Tennessee State University (MTSU) to develop guidelines, standards and specifications for TDOT for the purpose of using Full-Depth Reclamation (FDR) as a viable pavement rehabilitation technique. A wide variety of maintenance and rehabilitation techniques are available and have been used to rehabilitate worn out and distressed pavements. FDR is one of the major rehabilitation techniques available to restore pavements once the pavement has deteriorated and distressed to the levels requiring major work. In its simplest form, FDR consists of in-situ pulverization of existing pavement and underlying layers, uniform blending of pulverized material, grading, and compaction. FDR recycles 100% of the old distressed asphalt pavement to form a strong base course with addition of certain materials to improve the quality and capacity of the stabilized base. Three common types of stabilization methods are: (a) mechanical stabilization (addition of aggregates), (b) chemical stabilization (addition of cement) and (c) bituminous stabilization (addition of asphalt binder). The type of FDR construction is selected based on the existing pavement condition, locally available materials and traffic demand. FDR has become an increasingly common technology in recent years to restore the service life of pavement structures requiring deep rehabilitation and to stretch available funding for pavement rehabilitation. Several factors contribute to this interest including improved equipment, stabilization technology, sustainability, and costs relative to more conventional rehabilitation strategies. Despite the increasing use of FDR, questions still linger regarding the behavior of the stabilized materials and their long-term performance under traffic loads. Many state DOT’s have successfully used FDR to mitigate distressed pavements and restored structural integrity. TDOT has conducted a limited number of FDR demonstration projects, but need to organize and consolidate information about FDR, with the objective of producing an implementable set of guidelines, criteria, and specifications on the FDR related projects.

    Language

    • English

    Project

    • Status: Active
    • Funding: $199,274.00
    • Contract Numbers:

      RES2020-11

      40100-07219

    • Sponsor Organizations:

      Tennessee Department of Transportation

      James K. Polk Building
      Fifth and Deaderick Street
      Nashville, TN  United States  37243-0349
    • Managing Organizations:

      University of Tennessee, Chattanooga

      615 McCallie Avenue, Department 4905
      Chattanooga, TN  United States  37403
    • Project Managers:

      Johnson , Angie

    • Performing Organizations:

      The University of Tennessee at Chattanooga

      615 McCallie Avenue
      Chattanooga, TN  United States  37403
    • Principal Investigators:

      Owino, Joseph

      Brown , Heather

    • Start Date: 20190801
    • Expected Completion Date: 20201130
    • Actual Completion Date: 0
    • USDOT Program: Transportation, Planning, Research, and Development

    Subject/Index Terms

    Filing Info

    • Accession Number: 01744209
    • Record Type: Research project
    • Source Agency: Tennessee Department of Transportation
    • Contract Numbers: RES2020-11, 40100-07219
    • Files: RiP, STATEDOT
    • Created Date: Jun 26 2020 4:27PM