Synthesis of Information Related to Highway Practices. Topic 55-04. Current Practices and Guidelines for Full-Depth Reclamation (FDR)

Full-Depth Reclamation (FDR) is an in-place recycling method for reconstruction and rehabilitation of flexible pavements, as well as construction of new alignments, that uses existing materials as the base for a new surface wearing course. By making effective use of the pavement, paving projects using FDR may be sustainable and may achieve reduced costs. Pulverized roadway materials may be blended with stabilizing additives such as emulsified asphalt, foamed (expanded) asphalt, calcium chloride or Portland cement to form a stiff base layer. FDR is a widespread practice, but state departments of transportation (DOTs) have diverse construction practices and quality assurance procedures for FDR. The objective of this synthesis is to document current state DOT practices and guidelines for the use of FDR.


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  • Status: Completed
  • Funding: $55000
  • Contract Numbers:

    Project 20-05, Topic 55-04

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Harrigan, Edward

  • Performing Organizations:

    ,   Germany 

    Jo E Sias

    Durham, NH   
  • Principal Investigators:

    Sias, Jo

  • Start Date: 20231015
  • Expected Completion Date: 20240325
  • Actual Completion Date: 20240325

Subject/Index Terms

Filing Info

  • Accession Number: 01883939
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 20-05, Topic 55-04
  • Files: TRB, RIP
  • Created Date: May 30 2023 8:40PM