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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
    • Details You May Also Like

    Details:

    • 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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