Cost-effectiveness and performance of overlay systems in Illinois, volume 2 : guidelines for interlayer system selection decision when used in HMA overlays.
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Cost-effectiveness and performance of overlay systems in Illinois, volume 2 : guidelines for interlayer system selection decision when used in HMA overlays.

Filetype[PDF-1.08 MB]


English
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  • Creators:
  • Corporate Creators:
    Illinois Center for Transportation
  • Corporate Contributors:
    Illinois. Department of Transportation. Bureau of Materials and Physical Research
  • Subject/TRT Terms:
  • Publication/ Report Number:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Illinois
  • Edition:
    Project report, 2005-2008
  • Corporate Publisher:
    Illinois Center for Transportation
  • Abstract:
    In an effort to control reflective cracking in hot-mix asphalt (HMA) overlays placed over Portland Cement

    Concrete (PCC) pavements, several reflective crack control (RCC) systems, including interlayer systems,

    have been used. However, the cost-effectiveness of interlayer systems is still in doubt due their performance

    and additional costs. In this project, a decision making procedure to aid in the selection of cost-effective

    interlayer systems was developed. As a core step in evaluating the benefit-cost ratio (B/C) of interlayer

    systems, a user-friendly life-cycle cost analysis (LCCA) program, CIND (Cost-effective INterlayer system

    Decision program) was developed. Based on sensitivity analysis, a B/C prediction model was proposed, which

    takes into account a performance benefit ratio (PBR) parameter, a material cost ratio (MCR), and a

    construction time ratio (CTR). Using the B/C model, a table was developed which allows the user to

    determine the most cost-effective interlayer system in a rehabilitation project for a given equivalent single-axle

    load (ESAL) level, representative low temperature (TL), and existing concrete pavement joint spacing (JS).

    Finally, a decision making tree was constructed to simplify the process of determining the most cost-effective

    and compatible interlayer system for a given project. Depending on project significance and/or information

    availability, pavement engineers can select from one of three newly developed B/C evaluation tools (in order

    of sophistication): application tables, B/C prediction model, and the CIND computer program. Using these

    tools, it was found that B/C increases as PBR increases or MCR and CTR decrease. In general, System D is

    cost-effective in a wide range of ESALs and TL values; especially in a cold region with lower traffic volume.

    The application range is reduced with the increase of JS, however. System E is relatively cost-effective only in

    warm regions having higher traffic volume.

  • Format:
    PDF
  • Funding:
    ICT-R58
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