EFFECTIVENESS OF SACRIFICIAL ANODES IN HIGH-RESISTIVITY SHOTCRETE REPAIRS

This study investigated the use of discrete sacrificial anodes to improve the durability and extend the life of a shotcrete patch repair in a column. Three columns were used in the investigation. In two columns, anodes were placed around the perimeter of the repair area. In a third column, used as a control, anodes were not placed inside the repair area. Shotcrete was then placed in the repair areas of all three columns. The study found that the current density level needed to improve the resistance of the steel to chloride-induced corrosion is being met. In addition, the anode current is able to reach a distance of 16 cm from the anode center, meeting the requirements for cathodic prevention within this region. A cost analysis, using the capital recovery method, indicated that repairs using shotcrete plus cathodic protection will cost less than repairs using shotcrete alone.

• Record URL:
  http://www.virginiadot.org/vtrc/main/online_reports/pdf/05-r25.pdf
• 
• Corporate Authors:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903

  Virginia Department of Transportation

  1401 East Broad Street
  Richmond, VA  United States  23219
• Authors:
  • Brown, M C
  • Sharp, S R
• Publication Date: 2005-3

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 27 p.

Subject/Index Terms

• TRT Terms: Cathodic protection; Columns; Cost effectiveness; Durability; Patching; Repairing; Sacrificial anodes; Service life; Shotcrete
• Subject Areas: Design; Highways; Maintenance and Preservation; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00989225
• Record Type: Publication
• Report/Paper Numbers: VTRC 05-R25,, Final Report,, VTRC Project No. 73232
• Files: TRIS, STATEDOT
• Created Date: Apr 14 2005 12:00AM