A REPORT ON THE CONTINUITY BETWEEN A CONTINUOUSLY REINFORCED CONCRETE PAVEMENT AND A CONTINUOUS SLAB BRIDGE

AN EXPERIMENTAL PROJECT WAS COMPLETED IN WHICH REINFORCING STEEL WAS USED TO TIE THE TERMINAL END OF A CONTINUOUSLY REINFORCED CONCRETE PAVEMENT /CRCP/ TO AN OVERPASS APPROACH SLAB WHICH, IN TURN, WAS TIED TO BOTH THE ABUTMENT AND THE OVERPASS DECK SLAB. THE PURPOSE OF THE PROJECT WAS TO MAINTAIN ROADWAY CONTINUITY AS A MEANS OF MINIMIZING MAINTENANCE AND ROUGHNESS PROBLEMS ASSOCIATED WITH CONVENTIONAL CONSTRUCTION AT BRIDGE AND OVERPASS APPROACHES. THIS REPORT DESCRIBES THE DETAILS OF THE CONTINUOUS SYSTEM AND PRESENTS OBSERVATIONAL INFORMATION DURING THE FIRST TWO YEARS OF SERVICE. AN IDENTICAL OVERPASS STRUCTURE IN THE OPPOSITE ROADWAY WITH CONVENTIONAL APPROACHES SERVED AS A CONTROL. PERIODIC INSPECTIONS INCLUDED /1/ THE RECORDING OF ALL CRACKS IN THE APPROACH SLABS AND IN SEVERAL HUNDRED FEET OF THE CRCP IN EACH DIRECTION FROM THE OVERPASS AND /2/ CLOSE EXAMINATION OF THE OVERPASS ABUTMENTS. IN THE EXPERIMENTAL INSTALLATION, THE 40-FOOT APPROACH SLABS ON EITHER SIDE OF THE OVERPASS DEVELOPED A TRANSVERSE CRACK NEAR THE STRUCTURE AND ANOTHER TRANSVERSE CRACK OF HALF-MOON OR PARABOLIC PATTERN NEAR THE PAVEMENT END, WITH THE LATTER CRACK BEING IN EXCESS OF 0.1 INCH. AFTER TWO YEARS OF SERVICE THE APPEARANCE OF THE EXPERIMENTAL INSTALLATION WAS SUPERIOR TO THE CONTROL INSTALLATION WITH ITS WIDE EXPANSION JOINTS. CLOSE EXAMINATION OF THE OVERPASS ABUTMENTS DID NOT REVEAL ANY DISTRESS. ON THE BASIS OF THE PERFORMANCE OF THE EXPERIMENTAL INSTALLATION, THE INVESTIGATORS CONCLUDE THAT A MARKED IMPROVEMENT CAN BE MADE OVER CURRENT DESIGN TECHNIQUES FOR THE TRANSITION BETWEEN THE HIGHWAY PAVEMENT AND BRIDGE OR OVERPASS DECKS. THE RECOMMENDATION WAS MADE THAT, IN FUTURE EXPERIMENTS, THE APPROACH SLABS BE ELIMINATED, THE CRCP BE CONTINUOUS TO THE BRIDGE OR OVERPASS DECK AND THE END OF CRCP BE ANCHORED INTO THE ABUTMENT, BUT NOT TO THE DECK SLAB . /BPR/

  • Supplemental Notes:
    • Hpr-1/5/, BPR-5, STATE 1-8-63-39
  • Corporate Authors:

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  USA  78701
  • Authors:
    • McCullough, B F
    • Herber, F
  • Publication Date: 1966-8

Subject/Index Terms

Filing Info

  • Accession Number: 00205345
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Dec 1 1994 12:00AM