SELECTION AND PERFORMANCE EVALUATION OF CATHODIC PROTECTION SYSTEMS FOR REINFORCED-CONCRETE PARKING STRUCTURES

This paper discusses various aspects of cathodic protection (cp) systems designed especially for reinforced concrete parking structures. As cp is believed to be probably the most cost-effective corrosion control option for existing facilities, several alternative systems for the routine application of cp to parking structures have been developed during the 1980s. Most of these systems have used a conductive coating applied to the soffit as the primary anode, instead of the overlay on the top surface. Other systems have been applied to the top surface. Before applying cp, the electrical continuity of embedded metallic components in a reinforced concrete structure must be assured, and a sample of the stressed member must be retrieved and analysed metallographically to determine its type of crystal structure. Despite their limitations, soffit conductive coating systems represent the vast majority of parking deck cp systems, mainly because of their lower cost and minimal facility disruption during installation. In some circumstances, lightweight embedded anode systems are better. There is no currently available published standard for assessing the performance of reinforcing concrete steel cp systems; at present, the only criterion on which experts seem close to agreement is the -100 mv potential shift. The paper ends by discussing some possible future prospects and developments for cp systems. (TRRL)

  • Availability:
  • Corporate Authors:

    Palladian Publications Limited

    14 Park Street
    Windsor, Berkshire,   England 
  • Authors:
    • Gummow, R A
  • Publication Date: 1989-6

Media Info

  • Pagination: p. 34-8
  • Serial:
    • CONSTRUCTION REPAIR
    • Volume: 3
    • Issue Number: 5
    • Publisher: PALLADIAN PUBLICATIONS LTD
    • ISSN: 0967-0726

Subject/Index Terms

Filing Info

  • Accession Number: 00497815
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM