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Implementation of Texas asphalt concrete overlay design system.

File Language:
English


Details

  • Creators:
  • Corporate Creators:
    Texas A&M Transportation Institute
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/TX-13/5-5123-03-1
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Texas
  • Corporate Publisher:
    Texas Department of Transportation. Research and Technology Implementation Office
  • Abstract:
    An asphalt overlay design system was developed for Texas Department of Transportation (TxDOT) under

    Research Project 0-5123. The new overlay design system, named the Texas Asphalt Concrete Overlay

    Design System (TxACOL), can help pavement engineers optimize asphalt overlay design in terms of

    overlay mix type and thickness, based upon existing pavement structure and conditions (existing distress

    types and/or load transfer efficiency at joints/cracks), local weather conditions, and anticipated traffic

    level.

    Several districts in Texas expressed interest in implementing this new overlay design system for designing

    asphalt overlays. To facilitate the implementation in districts, Project 5-5123-03 was initiated. The work

    performed under this study included (a) developing and conducting district-oriented overlay design

    workshops, (b) providing asphalt overlay design assistance and monitoring the new constructed overlays,

    (c) performing laboratory testing and updating the material default values of overlay mixes, (d) surveying

    the field performance (rutting and cracking) of asphalt overlay projects, and (e) enhancing and calibrating

    the TxACOL.

    This report documents the work and findings from this study. Case analyses showed that the enhanced

    TxACOL can make reasonable predictions compared to survey results. The researchers recommend that

    TxACOL be used as a tool for asphalt overlay design in TxDOT districts. Apparently, calibration factors

    still need to be further verified through more field test sections.

  • Format:
    PDF
  • Funding:
    Project 5-5123-03
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:3c6ce743fc1539ca87ff7f114d1a047a9b60e16e4b177e66353db77575358cd8eaae65fef1ce0da3bf4c0d9af2772a1be9fb67e3728966194717486c925f06f7
  • Download URL:
  • File Type:
    Filetype[PDF - 7.44 MB ]
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