I-81 in-place pavement recycling project.
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields



Document Data
Clear All
Clear All

For additional assistance using the Custom Query please check out our Help Page


I-81 in-place pavement recycling project.

Filetype[PDF-2.09 MB]



  • Creators:
  • Corporate Creators:
  • Corporate Contributors:
  • Subject/TRT Terms:
  • Publication/ Report Number:
  • Resource Type:
  • Geographical Coverage:
  • Corporate Publisher:
  • Abstract:
    During the 2011 construction season, the Virginia Department of Transportation (VDOT) completed an in-place pavement

    recycling project to rehabilitate a section of pavement on I-81 near Staunton, Virginia. The project consisted of a 3.66-mile

    section of southbound I-81 in Augusta County. VDOT employed three in-place pavement recycling techniques and a unique

    traffic management plan to accomplish the work. The recycling processes included full-depth reclamation (FDR), cold in-place

    recycling (CIR), and cold central-plant recycling (CCPR). This project marked the first time in the United States that these three

    recycling techniques were combined in one project on the interstate system.

    Materials for both the CIR and CCPR were produced using hydraulic cement and foamed asphalt. A combination of hydraulic

    cement and lime kiln dust was chosen for the FDR process.

    The purpose of this research portion of this construction project was threefold: (1) to allow VDOT personnel to gain

    experience with the specific laboratory mix designs, field evaluation, and quality assurance procedures; (2) to characterize the

    structural properties of the materials used in the recycling project; and (3) to document the performance of the entire rehabilitated

    section during its initial 3-year service period.

    Various laboratory tests were conducted on materials collected before, during, and after construction to characterize the

    materials. These tests included gradation, resilient modulus, indirect tensile strength, dynamic modulus, and flow number.

    Additional tests to document the performance of the project included ride quality testing and rut-depth measurements collected via

    a traffic-speed profiler; pavement layer thickness measurements by ground penetrating radar; and structural capacity

    measurements by the falling weight deflectometer.

    From the results of this study, the combined structural layer coefficient for the CCPR and FDR materials was calculated as

    0.37. The structural layer coefficient for the CIR material was calculated as 0.39. The structural layer coefficient for the CCPR

    material was calculated to have a likely range of 0.37 to 0.44. Laboratory testing showed that the performance of the CCPR and

    CIR materials is expected to be similar. The field performance tests demonstrated that the section of pavement rehabilitated by

    the three in-place recycling methods continues to perform well after nearly 3 years of high-volume interstate traffic.

    This study recommends that VDOT pursue in-place recycling where it is most suitable. The study also recommends that

    VDOT consider increasing the structural layer coefficients used in the design for recycled materials. Further, VDOT should

    continue to monitor the performance of the I-81 project and other in-place recycling projects in an effort to develop long-term

    performance data. Finally, the study recommends that VDOT consider using long-term lane closure strategies similar to those

    employed in this project on other major pavement rehabilitation projects

  • Format:
  • Funding:
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:

Supporting Files

  • No Additional Files
More +

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov