CATHODIC PROTECTION OF BRIDGES

The corrosion of embedded reinforcement, caused by the presence of chloride ions in concrete, causes serious deterioration in highway structures. Cathodic protection consists of applying sufficient electrical current to the surface of the reinforcing steel to prevent it from discharging ions so that corrosion does not occur. Cathodic protection has been used on bridge decks in Ontario since 1978. Research studies were initiated in 1981 to develop a viable method of applying cathodic protection to bridge substructure members. Eight experimental systems were installed in 1982-83, two larger demonstration projects in 1984, and one system in 1985. Several of the systems were found to be effective in stopping the corrosion and the work is now underway to improve the long-term durability of the components. (Author/TRRL)

• Corporate Authors:

  Ontario Ministry of Transportation & Communic, Can

  Research and Development Division, 1201 Wilson Avenue
  Downsview, ONo M3M 1J8,   Canada 
• Authors:
  • Manning, D G
  • SCHELL, H C
• Publication Date: 1986-10

Media Info

• Features: Figures; Photos; References; Tables;

Subject/Index Terms

• TRT Terms: Bridge decks; Cathodic protection; Chlorides; Corrosion protection; Reinforcing steel
• ITRD Terms: 3482: Bridge deck; 8018: Canada; 5252: Corrosion; 6951: Electrode; 9149: Prevention; 3471: Reinforcement (in mater); 4542: Steel
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00478593
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: ITRD, TRIS
• Created Date: Jan 31 1989 12:00AM