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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 Performance of Steel-Plated Reinforced Concrete Beams After Long-Term Natural Exposure
Author(s): Brian Hobbs,S, R. Narayan Swamy, and Mark Roberts
Publication: Special Publication
Appears on pages(s): 101-126
Keywords: adhesives; beams (supports); corrosion; deterioration; exposure; durability; epoxy resins; plates (structural members); reinforced concrete; reinforcing steels; renovating; Materials Research Brian Hobbs, R. Narayan Swamy, and Mark Roberts
Abstract:Extensive research has established that the provision of epoxy bonded steel plates as external reinforcement can be effective and efficient in enhancing the serviceability and ultimate strength of reinforced concrete beams. This plate bonding technique has many technical and practical advantages and provides an economic means of strengthening and rehabilitating damaged and/or deteriorated structures. There is, however, only limited data on the long term performance and durability of such strengthened beams. This paper presents the results of a comprehensive test program in which 21 steel plated reinforced concrete beams, both unloaded and loaded, were exposed to natural weathering for up to 12 years, without any maintenance, in an industrially polluted area. The main variables investigated include adhesive thickness, number of plates, and number and location of plate laps. The beams were examined in great detail after the exposure period; the extent of corrosion damage and the mechanisms of deterioration due to this exposure are critically evaluated and presented.
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