PAVING PRACTICES FOR WEARING SURFACES ON ORTHOTROPIC STEEL BRIDGE DECKS - ADDENDUM REPORT

THE PERFORMANCE OF ASPHALT PAVEMENTS HAS BEEN LESS OF A PROBLEM THAN ORIGINALLY ANTICIPATED, ALTHOUGH THE EFFECTS OF TIME ON THE OBSERVED DEFECTS CANNOT YET BE DETERMINED. THE PORT MANN BRIDGE, THE OLDEST ORTHOTROPIC BRIDGE IN NORTH AMERICA, REMAINS IN NEAR PERFECT CONDITION WITH NO OBSERVABLE DEFECTS. HOWEVER, CRACKING AND/OR BREAKOUTS HAVE BEEN OBSERVED IN ASPHALT PAVEMENTS ON SEVERAL BRIDGES, BOTH NEWLY PAVED AND RELATIVELY OLD. IT IS LIKELY THEY WERE CAUSED BY COMPACTION OR DEFORMATION OF A MASTIC MORTAR USED TO LEVEL THE DECK PLATES. THE PROBLEM OF LOSS OF BOND AND SUBSEQUENT BREAKOUTS CONTINUES TO PLAGUE THE EPOXY-GRIT PAVEMENT ON THE BUDBLIN BRIDGE. THIS PAVING TECHNIQUE, I.E., THE SPREADING OF PURE RESIN BINDER ONTO WHICH IS BROADCAST FINE AGGREGATE CHIPS, APPARENTLY RESULTS IN A LOWER BOND STRENGTH THAN NORMALLY EXPECTED OF RESINOUS BASED PAVING MATERIALS. THE PROBLEM OF WEAR OR LACK OF ABRASION RESISTANCE OF RESINOUS BASED PAVEMENTS ALSO IS BECOMING MORE PRONOUNCED. THE EROSION OF THE WEARING SURFACE IS NOW APPARENT ON ALL THE BRIDGES PAVED WITH RESINOUS MATERIALS WITH THE NOTABLE EXCEPTION OF EPOXY ASPHALT. WHILE THE RATE OF EROSION IS DEPENDENT ON A NUMBER OF FACTORS, SERIOUS QUESTIONS HAVE NOW BEEN RAISED ABOUT THE EXPECTED DURABILITY OF RESINOUS BASED PAVEMENTS.

  • Supplemental Notes:
    • Bull No 20, 19 PP, 44 PHOT, 3 REF
  • Corporate Authors:

    Battelle Memorial Institute

    Columbus, OH  United States 
  • Authors:
    • FONDRIEST, F F
    • Snyder, M J
  • Publication Date: 1971-10

Subject/Index Terms

Filing Info

  • Accession Number: 00209606
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 1 1972 12:00AM