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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: Comparative Evaluation of Traditional and Innovative Corrosion Protection Methods in Cracked Reinforced Concrete Exposed to Chloride Environment
Author(s): F. Tittarelli, G. Moriconi, G. Gasparri, and R. Fratesi
Publication: Special Publication
Appears on pages(s): 613-628
Keywords: chlorides; corrosion resistance; cracking; steel construction
Abstract:The corrosion resistance of cracked concrete specimens reinforced with bare, stainless, or galvanized steel plates are compared with the corrosion behavior of bare steel reinforcement embedded in concrete specimens coated with a flexible polymer--cement based mortar both before and after specimen cracking. The results in terms of corrosion electrochemical potential and short-circuit electric current measured on the different steel reinforcements are also compared with those related to galvanized reinforcement embedded in hydrophobic concrete specimens. Reinforced concrete specimens were manufactured for each protection method considered and cured before exposure to the test environments. Some specimens were previously cracked by applying flexural stress. The specimens were exposed to increasingly aggressive environments; forty days of full immersion in a 3.5% NaCl solution, simulating a marine environment, were followed by five months of wet-dry cycles using a 10% NaCl solution, simulating a bridge deck treated with deicing salts. The results for the full immersion condition show that negligible corrosion rates were detected in all the cracked specimens, except those treated with the flexible polymer-cement mortar before specimen cracking and the hydrophobic concrete specimens. On the other hand, for the cracked specimens exposed to wet-dry cycles, high corrosion rates were measured for both bare and galvanized steel reinforcement. This was in contrast to the constantly good behavior of stainless steel reinforcement and also of the galvanized steel reinforcement embedded in the hydrophobic concrete.
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