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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: Corrosion of Steel Reinforcement in Concrete Adjacent to Surface Repairs
Author(s): Dale P. Barkey
Publication: Materials Journal
Appears on pages(s): 266-272
Keywords: corrosion; reinforcement; repair; steel
Abstract:Reinforced concrete may be damaged by chloride-induced corrosion of steel reinforcement, resulting in spalling and delamination as corrosion products accumulate. A surface repair entails removal of damaged concrete and its replacement with repair material. The resulting inhomogeneity between the repair material and remaining chloride-contaminated concrete, however, may produce active-passive corrosion macrocells that drive rapid anodic dissolution of the metal. This experimental study was undertaken to characterize the geometry, current distribution, and controlling resistance of corrosion macrocells driven by differences in the electrochemical environment in repair material and contaminated concrete. Additional influences such as galvanic contact between the test reinforcement bar and remote cathode bars were also considered. The tests were based on ASTM G 109, with modifications to incorporate simulated repairs.
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