FINAL SUMMARY REPORT OF CRC PAVEMENTS IN ILLINOIS

Determining the economic feasibility and the behavior of continuous reinforcement in Portland Cement Concrete (PCC) pavement and developing essential design criteria are principal objectives of the research this report summarizes. Between 1963 and 1971, experimental continuously reinforced concrete (CRC) pavements were constructed in seven highway districts to gain construction experience and to observe service behavior. Even though contractors, during early projects, developed machines for placing reinforcement, a slipform paver that feeds the longitudinal bars through a series of tubes, eliminating the need for transverse bars, evolved as the common method of placing CRC pavement. Early failures revealed that CRC pavements require more careful construction procedures than conventional jointed pavements and, as the pavements aged, load failures attributed to poor drainage, greater than anticipated traffic loads, and concrete disintegration (D-cracking) became evident, particularly in the 7-inch slabs. A 1970 examination of reinforcement disclosed that no significant corrosion existed in the experimental pavements, even though water did penetrate each investigated crack. More recently, lug anchors, originally used to restrain pavement movement, have rotated, causing a rough-riding bump at each lug. Illinois' design policy currently provides for at least an 8-inch-thick slab (steel depth 3 inches below the surface) overlying a stabilized subbase. Wide-flange beam terminal joints accommodate end movements and, where needed, underdrains are located along the edge of the pavement subbase. CRC overlays (7-inch minimum) can satisfactorily upgrade structural capabilities, but they should not be considered solely for restoring pavement smoothness. /FHWA/

  • Supplemental Notes:
    • Study Title: IHR-36-Investigation of Continuously Reinforced Concrete Pavement.
  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  United States  62704-4766

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Dhamrait, J S
  • Publication Date: 1979-5

Media Info

  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00302196
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-IL-PR-084 Final Rpt., FCP 45J2-113
  • Contract Numbers: IHR-36
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Dec 19 1979 12:00AM