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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 in Concrete in Relation to Bar Diameter and Cover Thickness
Author(s): R. Sri Ravindrarajah and K. C. G. Ong
Publication: Special Publication
Appears on pages(s): 1667-1678
Keywords: concrete durability; corrosion; cover; mortars (material); reinforcing steels; thickness; water-cement ratio; Design
Abstract:One of the most common forms of deterioration of reinforced concrete structures is associated with the corrosion of reinforcement. The corrosion of the embedded steel bars is mainly due to the ingress of oxygen, water, carbon dioxide, chlorides, and other harmful salts towards the steel. The rate of corrosion depends on the quality of the cover concrete, cover thickness, and bar diameter. This paper discusses the results of an experimental investigation into the corrosion of steel bars in mortar with the use of an accelerated corrosion technique. It has been concluded that the cover/bar diameter ratio plays a significant role in determining the corrosion intensity of steel exposed to a given environment. In addition, an increase in the area of the exposed surface of the corrosion specimens directly decreases the corrosion resistance of steel in concrete.
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