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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Durability of Steel Reinforcement in Marine Environment
Author(s): R. N. Swamy, S. Koyama, T. Arai, and N. Mikami
Publication: Special Publication
Appears on pages(s): 147-162
Keywords: accelerated tests; concrete durability; corrosion resistance; cover; crack width and spacing; epoxy resins; marine atmospheres; field tests; protective coatings; reinforced concrete; reinforcing steels; Materials Research
Abstract:Presents comprehensive test data on the corrosion resistance of plain, galvanized, and epoxy-coated reinforcing bars exposed to marine environment. The bars were embedded in concrete prisms, precracked to a steel stress of 200 MPa, and then subjected to two exposure regimes in a loaded condition. A natural exposure in a corrosive tidal zone and an accelerated wetting and drying cyclic regime in sea water were chosen for the corrosion tests. In addition, tests were also conducted on bars provided with artificially damaged coatings; further marine exposure tests were also carried out on cracked prisms and damaged coatings in the cracked regions. The test results show that even a 70 mm cover is inadequate to protect uncoated bars from corrosion in marine environment. Galvanized bars exhibited improved performance but did not provide complete protection. Epoxy coated bars are shown to afford long term protection against corrosion even under severe exposure conditions and with damaged coatings.
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