CATHODIC PROTECTION OF BRIDGE DECKS IN PENNSYLVANIA

This report presents discussion of the types of bridge deck cathodic systems currently being evaluated in Pennsylvania. The systems are: (1) an impressed current system utilizing a two-inch conductive coke-asphalt and a hot asphalt wearing surface, with eight zones controlled by zinc reference cells and each zone having four silicon-cast iron anodes; (2) a non-overlay, impressed current system utilizing 1/2-inch by 3/4-inch slots at two-foot spacing longitudinally with platinized niobium copper anode wires and conductive grout placed in the slots; six zones are controlled by zinc reference cells; (3) a non-overlay, constant current system where the total deck is one zone and the current the same throughout; sawed slots, 3/4-inch by 3/4-inch are placed on one-foot centers longitudinally with high purity carbon strand as secondary anodes; three transverse slots contain the platinized wires as primary anodes; this electrically redundant system has the slots filled with conductive grout; and (4) strips of conductive grout are spread over transverse primary anode and one-foot spaved carbon strands on a patched and scarified deck. A latex-modified concrete overlay is provided as a wearing surface. A comparison of some construction methods and cost analysis versus other systems nationwide are also presented. (Author)

• Corporate Authors:

  Pennsylvania Department of Transportation

  Engineering Technology Division, 1009 Transportation and Safety Building
  Harrisburg, PA  United States  17120

  Federal Highway Administration

  Demonstration Projects Division, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Turgeon, R
• Publication Date: 1984-10

Media Info

• Features: Appendices; Figures; Photos; References;
• Pagination: 39 p.

Subject/Index Terms

• TRT Terms: Anodes; Asphalt pavements; Bridge decks; Carbon; Cathodic protection; Coke; Concrete pavements; Electrical conductivity; Grout; Pavement overlays; Pavement wearing course
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00392185
• Record Type: Publication
• Report/Paper Numbers: FHWA-PA-84-013 Annual Rpt
• Files: TRIS, USDOT, STATEDOT
• Created Date: Feb 28 1985 12:00AM