CONCRETE BRIDGE DECK DURABILITY

A THOROUGH LITERATURE SEARCH WAS MADE OF ALL PERTINENT PUBLICATIONS, INTERVIEWS WERE HELD WITH KNOWLEDGEABLE HIGHWAY PERSONNEL, AND CURRENT PRACTICES, PLANS, SPECIFI- CATIONS MANUALS. AND RESEARCH RECOMMENDATIONS WERE EXAMINED TO ACQUIRE ALL DATA PERTAINING TO THE PROBLEM OF DETERIORATING CONCRETE BRIDGE DECKS, THE CAUSES, PREVENTION, AND CORRECTIVE MEASURES. THERE APPEARS TO BE A SIMILARITY OF BRIDGE DECK DETERIORATION THROUGHOUT THE UNITED STATES FALLING INTO THE CATEGORIES OF THREE TYPES OF DEFECTS: SPALLING, SCALING, AND CRACKING, SPALLING IS GENERALLY RECOGNIZED AS THE MOST TROUBLESOME DEFECT, BECAUSE THE DECK IS WEAKENED LOCALLY, REINFORCEMENT IS EXPOSED, RIDING QUALITY IS IMPAIRED, AND REPAIR WORK IS DIFFICULT. SPALLING IS MAINLY CAUSED BY THE CORROSION OF REINFORCING STEEL, REQUIRING THE PRESENCE OF MOISTURE AND A CHLORIDE SALT. CRACKS PROVIDE READY ACCESS FOR MOISTURE AND SALT TO REACH THE STEEL, ALTHOUGH COURSE CONCRETE WITHOUT CRACKS IS ALSO SUSCEPTIBLE TO MOISTURE AND SALT INTRUSION. VARIOUS WATERPROOF BARRIERS PROTECTED BY A WEARING COURSE ARE CURRENTLY IN VOGUE AS A PREVENTIVE MEASURE. IN ADDITION, GREATER COVER OVER REINFORCING STEEL, INCREASED EFFORTS AT CRACK CONTROL, AND LESS POROUS CONCRETE ARE URGED AS ESSENTIAL IMPROVEMETNS. SCALING CAN BE VIRTUALLY ELIMINATED BY THE USE OF HIGH-QUALITY AIR-ENTRAINED CONCRETE, ASSISTED WHEN NECESSARY BY PERIODIC LINSEED OIL APPLICATIONS. CRACKING IS NOT CONSIDERED TO BE SERIOUS.

  • Availability:
  • Supplemental Notes:
    • No 4, Nchrp PROJECT 20-5, 28 PP, 13 FIG, 3 TAB, 102 REF
  • Publication Date: 1970

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Filing Info

  • Accession Number: 00213798
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: Oct 13 1970 12:00AM