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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: Bonding and Corrosion Protection Properties of Two Coatings for Prestressing Steels
Author(s): Fernand Ellyin and Rafik A. Matta
Publication: Journal Proceedings
Appears on pages(s): 366-371
Keywords: beams (supports); bonding; calcium chloride; coatings; corrosion;
cracking (fracturing); deicers; epoxy resins; flexural tests; friction; post-ten-sioning;prestressed concrete; prestressing steels; protective coatings; pullouttests; salts; slurries.
Abstract:Corrosion resistance and bonding properties of two types of coatings have been investigated. Cement slurry and coal-tar modified epoxy (resin) were applied on different types of prestressing steels. Twenty pretensioned and post-tensioned beams with uncoated, cement-slurried, and resin-coated strands were subjected to the attack of calcium chloride (CaClJ and sulfur dioxide (SO*) environments. The results indicated that both coatings protected the prestressing steels against corrosion; however, provisions have to be made concerning the bonding properties of these coatings. It is concluded that in the case of coated pretensioned strands, care must be exercised to insure a sufficient transfer length. This will then allow for the development of the required ultimate moment of resistance.
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