REVIEW OF A THREE-YEAR BRIDGE DECK STUDY IN PENNSYLVANIA

THE RESULTS OF THE INITIAL THREE YEARS OF CONTINUING RESEARCH PROJECT ON THE DURABILITY OF CONCRETE BRIDGE DECKS IN PENNSYLVANIA ARE PRESENTED. THE STUDY INVOLVED FIELD SURVEYS OF 38 BRIDGE DECKS COMPRISING 2,782 TEN-FT LONG SURVEY UNITS. A TOTAL OF 154 CORES WERE TAKEN FROM 34 OF THE DECKS. THE CORES WERE SUBJECTED TO DETAILED LABORATORY ANALYSES INCLUDING DETERMINATION OF AIR VOID PARAMETERS BY LINEAR TRAVERSE TECHNIQUES, WATER CEMENT (W/C) RATIO DETERMINATIONS, AND PETROGRAPHIC EXAMINATION. SEVEN BRIDGE DECKS WERE OBSERVED DURING CONSTRUCTION TO EXAMINE AND EVALUATE THE EFFECT OF CONSTRUCTION PRATICES ON DURABILITY. BRIDGE DECKS WERE RESURVEYED ANNUALLY TO ESTABLISH RATES. THE MAJOR TYPES OF DETERIORATION FOUND WERE TRANSVERSE CRACKING, FRACTURE PLANES, POTHOLES, AND SURFACE MORTAR DETERIORATION. THE PRIMARY CAUSES OF DETERIORATION WERE INDICATED TO BE MATERIALS (AGGREGATES) AND WORKMANSHIP (OVERFINISHING, POOR QUALITY CONTROL WITH RESPECT TO ENTRAINED AIR AND W/C, AND IMPROPER PLACEMENT OF REINFORCEMENT). RECOMMENDATIONS TO ALLEVIATE THE CAUSES OF POOR PERFORMANCE AND SUGGESTED AREAS OF NEEDED RESEARCH ARE INCLUDED. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 11-25
  • Monograph Title: Concrete admixtures, aggregates and durability
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00213216
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 12 1994 12:00AM