EVALUATION OF SEVERAL TYPES OF CURING AND PROTECTIVE MATERIALS FOR CONCRETE - INSTALLATION REPORT AND INITIAL CONDITION SURVEY OF BRIDGE DECKS

THIRTY-NINE TEST PANELS WERE INSTALLED ON THREE INTERSTATE BRIDGES TO EVALUATE SEVERAL COMBINATIONS OF CURING AND PROTECTIVE TREATMENTS FOR CONCRETE. PANELS WERE CURED WITH WHITE PIGMENTED LIQUID MEMBRANE AND WHITE POLYETHYLENE, BOTH WITH AND WITHOUT SUBSEQUENT TREATMENTS USING LINSEED OIL. ONE PANEL RECEIVED A CHLORINATED RUBBER SEALER MARKETED AS A COMBINED CURING AND PROTECTIVE MATERIAL. ON SOME PANELS A MONOMOLECULAR FILM WAS USED TO REDUCE EVAPORATION PRIOR TO REGULAR CURING. DETAILED OBSERVATIONS OF CONSTRUCTION OPERATIONS AND ATMOSPHERIC CONDITIONS WERE RECORDED AND IMPORTANT PROPERTIES OF THE FRESHLY MIXED AND HARDENED CONCRETE DETERMINED. PERIODIC CONDITION SURVEYS ARE PLANNED. THE FOLLOWING OBSERVATIONS AND CONCLUSIONS RESULTED: (1) CONTRACTOR OPERATIONS WERE EFFICIENT AND UNIFORM, WHICH WILL GREATLY REDUCE THE INFLUENCE OF THE CONCRETE ON THE PERFORMANCE OF THE CURING AND PROTECTIVE TREATMENTS; (2) THE UNIFORMLY SATISFACTORY AIR CONTENTS INDICATE A GOOD PROBABILITY OF GOOD PERFORMANCE OF THE DECK SURFACES; (3) FIELD FREEZE-THAW AGREED WELL WITH AND CONFIRMED THE RESULTS OF SIMILAR TESTS REPORTED IN PART I OF THIS REPORT; (4) THE COVERAGE RATES OF SPRAYED CURING MATERIALS WERE LOWER THAN THOSE SPECIFIED; (5) POLYETHYLENE COVERINGS WERE APPLIED AN AVERAGE OF 45 MINUTES LATER THAN THE SPRAYED CURING MATERIALS; (6) LINSEED OIL COVERAGE RATES WERE VERY CLOSE TO THE TARGET VALUE OF 0.040 GAL/SQ YD, AT WHICH RATE THE PRESENCE OF THE LINSEED OIL IS BARELY DISCERNIBLE AFTER A MONTH OR TWO; (7) CHLORINATED RUBBER DEVELOPED A VERY TENACIOUS FILM WHICH BLISTERED AND REDUCED SKID RESISTANCE BY ABOUT 25 PERCENT; (8) THE BENEFITS OF THE MONOMOLECULAR FILM IN EXTENDING TIME AVAILABLE FOR FINISHING AND FOR USE IN EMERGENCY SITUATIONS WERE QUALITATIVELY CONFIRMED; (9) DIFFICULTIES WITH FINISHING WERE ASSOCIATED WITH DAYS WHEN THE COMPUTED EVAPORATION RATES EXCEED 0.10 LB/SQ FT/HR; AND (10) HIGH MIXTURE TEMPERATURES COMBINED WITH HIGH AIR TEMPERATURES WERE REFLECTED IN A MEASURABLE REDUCTION OF COMPRESSIVE STRENGTHS AND ACCELERATION OF SETTING. /AUTHOR/

  • Supplemental Notes:
    • Part Ii, 42 PP, 19 FIG, 17 TAB, 10 REF, 3 APP
  • Corporate Authors:

    Virginia Highway Research Council

    Charlottesville, VA  USA 
  • Authors:
    • Newlon, H H
  • Publication Date: 1970-7

Subject/Index Terms

Filing Info

  • Accession Number: 00213861
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 3 1989 12:00AM