AN ELECTRICAL METHOD FOR EVALUATING BRIDGE DECK COATINGS

FIELD AND LABORATORY TESTS HAVE INDICATED THAT THE ELECTRICAL RESISTANCE OF A BRIDGE DECK COATING CAN BE RELATED TO THE VOIDS AND THUS SEALING ABILITY OF THE COATING. IT IS CONSIDERED THAT THIS NONDESTRUCTIVE METHOD FOR EVALUATING BRIDGE DECK COATINGS MAY BE AN ADDITIONAL TOOL FOR EVALUATING THE PERFORMANCE OF MEMBRANES USED TO PREVENT THE INGRESS OF DEICING SALTS WHICH CAUSE CORROSION OF THE STEEL. IN THIS METHOD, THE RESISTANCE BETWEEN VARIOUS LOCATIONS ON THE BRIDGE SURFACE AND THE REINFORCING STEEL IS MEASURED. IT IS POSTULATED THAT AN EXCELLENT WATERPROOF COATING FOR BRIDGES WOULD ALWAYS HAVE A RESISTANCE GREATER THAN 500,000 OHMS/SQUARE FOOT, WHILE A POOR OR PERFORATED COATING WOULD NEVER HAVE A RESISTANCE GREATER THAN 100,000 OHMS/SQUARE FOOT. /AUTHOR/

• Supplemental Notes:
  • Rept No M/R-635116-5
• Corporate Authors:

  California Division of Highways

  Bridge Department
  Sacramento, CA  United States  05914
• Authors:
  • Spellman, D L
  • Stratfull, R F
  • Trimble, R R
  • Dukelow, S
  • Halterman, J
• Publication Date: 1971-6

Media Info

• Pagination: p. 28

Subject/Index Terms

• TRT Terms: Bridge decks; Coatings; Nondestructive tests; Resistance (Electricity); Resistivity method; Waterproofing materials
• Uncontrolled Terms: Membranes
• Old TRIS Terms: Membranes (Biology)
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217248
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Jun 12 1973 12:00AM