PRECAST REPAIR OF CONTINUOUSLY REINFORCED CONCRETE PAVEMENT

An investigation into the applicability of precast slabs for rapid repair of CRCP is presented. Analytical techniques are used to study loading of repair slabs due to volume change, wheel loads, and lifting, with detailed results presented in several of the appendices. Rapid rapair of CRCP with precast slabs appears feasible. Calculations indicate that slabs longer than 7 feet (2.13m) have potential problems with excessive steel stress at the construction joints. These stresses can be controlled with a weakened plane, which causes the concrete to crack at mid-span, thus lowering the stresses. A precast slab can be satisfactorily lifted from four lifting points secured into the slab and situated between 1/5 and 1/4 the span length from each edge of the slab. Steel connections to maintain the continuity of steel reinforcement in CRCP is a critical aspect of the repair. These connections can be made by welding, clamping, or use of commercial rebar connectors. Polymer concrete is a fast setting material which has excellent properties as a repair material for use around these connections. The set time of the material to be placed around the steel connections will, to a large extent, govern the overall repair time. (FHWA)

  • Corporate Authors:

    University of Texas, Austin

    Center for Highway Research, 200 West 21st Street
    Austin, TX  USA  78712

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  USA  78701
  • Authors:
    • Elkins, G E
    • McCullough, B F
    • Hudson, W R
  • Publication Date: 1979-5

Media Info

  • Pagination: 308 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00325367
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA/TX-79/23+177-15Intrm Rpt., FCP 45D2-424
  • Contract Numbers: 3-8-75-177
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 15 1981 12:00AM