EFFECT OF CONCRETE MOISTURE CONDITIONS ON THE ADHESION OF CONDUCTIVE PAINT
One means of applying cathodic protection to reinforced concrete structures involves the use of conductive paint as an anode on the concrete surface. A trial conductive paint cathodic protection system installed and monitored by the Ontario Ministry of Transportation revealed premature delamination of the conductive paint. This investigation was aimed at identifying the cause of adhesion failure with special emphasis on the effect of moisture in the concrete upon adhesion. Concrete test panels with and without reinforcement were prepared, then painted and exposed under a variety of moisture conditions. The reinforced concrete panels were powered at current densities typical of those encountered in the field. For concrete panels that were powered, delamination was observed in almost all cases. All failures involved deterioration of the concrete at the paint surface. It was observed that delamination of the paint appeared most likely to occur under conditions of high moisture and high chloride concentrations in the concrete. Recommendations include the development of a convenient on-site test to monitor concrete moisture. (a)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/02269414
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Corporate Authors:
Ontario Ministry of Transportation
1201 Wilson Avenue
Downsview, Ontario Canada M3M 1J8 -
Authors:
- Burns, C M
- Sampson, K
- Shunyl, Yuan
- Publication Date: 1988-12
Language
- English
Media Info
- Pagination: 57 p.
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Serial:
- Ontario Ministry of Transportation Research Report
- Publisher: Ontario Ministry of Transportation
- ISSN: 0226-9414
Subject/Index Terms
- TRT Terms: Adhesion; Bridges; Corrosion; Electrodes; Moisture content; Paint; Prevention
- Geographic Terms: Canada
- ITRD Terms: 5942: Adhesion; 3455: Bridge; 8018: Canada; 5252: Corrosion; 6951: Electrode; 5920: Moisture content; 3807: Paint; 9149: Prevention
- Subject Areas: Bridges and other structures; Security and Emergencies;
Filing Info
- Accession Number: 00498260
- Record Type: Publication
- Source Agency: Transport and Road Research Laboratory (TRRL)
- Report/Paper Numbers: MAT-88-01
- Files: ITRD, TRIS
- Created Date: Sep 30 1990 12:00AM