LONG-TERM OUTDOOR EXPOSURE EVALUATION OF CONCRETE SLABS CONTAINING EPOXY-COATED REINFORCING STEEL
Corrosion characteristics of straight epoxy-coated reinforcing steel (which met AASHTO and ASTM specifications) in concrete were studied. Specimens were exposed outdoors in a northern environment for more than 6.5 years, including about 3.1 years of salting cycles with a 3% sodium chloride solution. Straight epoxy-coated bars were evaluated when they were used in both mats and when they were used in the top mat only. An additional study variable was the use of uncoated bars in both mats. Results indicated that epoxy-coated rebars are many times more resistant to corrosion-induced damage than uncoated bars when embedded in salt-contaminated concrete and coupled to coated or uncoated bars in salt-free concrete. Overall best performance was achieved when the bars in both mats were epoxy coated. An observed softening of the coating in top- and bottom-mat bars after long-term exposure in the highly alkaline environment is also discussed.
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Availability:
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Supplemental Notes:
- This paper appears in Transportation Research Board Record No. 1284, Cement, Admixtures, and Concrete 1990. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
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Authors:
- Scannell, William T
- Clear, Kenneth C
- Publication Date: 1990
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 70-78
- Monograph Title: Cement, admixtures, and concrete
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Serial:
- Transportation Research Record
- Issue Number: 1284
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Coatings; Concrete; Corrosion; Corrosion resistance; Crash exposure; Epoxides; Performance evaluations; Reinforcing steel; Slabs; Sodium chloride; Softening point; Time duration
- Uncontrolled Terms: Exposure; Long term
- Old TRIS Terms: Epoxy
- Subject Areas: Highways; Materials; Safety and Human Factors; I32: Concrete;
Filing Info
- Accession Number: 00605616
- Record Type: Publication
- ISBN: 0309050634
- Files: TRIS, TRB, ATRI
- Created Date: Mar 31 1991 12:00AM