INVESTIGATION OF DOWEL BAR COATINGS

APPROXIMATELY 30 DIFFERENT DOWEL BAR COATINGS WHICH INCLUDED PAINTS, BITUMENS, LUBRICANTS, AND SPECIAL FORMULATIONS WERE EVALUATED. THE COATINGS, CLASSIFIED AS SHOP OR FIELD COATINGS, WERE APPLIED TO 1 1/8 INCH STEEL DOWELS WHICH WERE EITHER VIBRATED OR PREPLACED IN CONCRETE SPECIMENS 6 X 6 X 8 INCHES. PULLOUT TESTS WERE MADE AT THREE CONCRETE AGES AND BEFORE AND AFTER THE SPECIMENS WERE EXPOSED TO AN ACCELERATED CORROSION CONDITION. LOAD TRANSFER AND SCRATCH TESTS WERE CONDUCTED TO EVALUATE THE EFFECTS ON CONCRETE STRENGTH. COST, PLACEMENT TEMPERATURE, HANDLING DIFFICULTIES, VISUAL APPEARANCES WERE ALSO USED TO COMPARE THE COATINGS. CRITERIA WERE ESTABLISHED FOR JUDGING THE PERFORMANCE OF THE COATINGS. THE MOST SATISFACTORY MATERIALS FOR BOND PREVENTION WERE FOUND TO BE BITUMINOUS MATERIALS AND GREASES WITH A GRAPHITE ADDITIVE. A NEED FOR CORROSION PROTECTION WAS INDICATED AND THE BITUMINOUS MATERIALS, TARSET, RED LEAD AND OTHERS SATISFIED THIS REQUIREMENT. THE GREASES, HOWEVER, DID NOT PROVIDE ADEQUATE CORROSION PROTECTION. BOTH METHODS OF DOWEL BAR INSTALLATION, POURED IN PLACE AND VIBRATED INTO PLACE, PROVIDED SATISFACTORY RESULTS. /AUTHOR/

• Supplemental Notes:
  • Hpr-1/2/, STATE 930-040, BPR-10
• Corporate Authors:

  Auburn University

  Auburn, AL  United States  36830

  Bureau of Public Roads /US

  400 7th Street, SW
  Washington, DC  United States  20590
• Authors:
  • Ramey, G E
• Publication Date: 1967

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Alternatives analysis; Bars (Building materials); Bitumen; Bituminous materials; Bonding; Coatings; Concrete; Concrete placing; Corrosion; Corrosion protection; Costs; Dowels (Fasteners); Evaluation; Graphite; Grease; Handling characteristics; Load transfer; Lubricants; Paint; Performance; Steel; Strength of materials; Temperature; Visual perception
• Uncontrolled Terms: Handling
• Old TRIS Terms: Placing temperature
• Subject Areas: Finance; Geotechnology; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00215867
• Record Type: Publication
• Source Agency: Bureau of Public Roads /US
• Files: TRIS
• Created Date: Jan 16 1994 12:00AM