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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: Bond Properties of High Strength,
Low Carbon Bars with Drawn-in
Helical Deformation for Use in
Pretensioning and as Special Normal
Author(s): M. Schupack and K. Mizuma
Publication: Journal Proceedings
Appears on pages(s): 249-276
Keywords: bond (concrete to reinforcement); concrete piles; deformed reinforcement; flexural strength; post-tensioning; prestressed concrete prestressing steels; pretensioning; stress transfer.
Abstract:A drawn, helically grooved, low carbon, induction heat-treated prestressing steel has been developed and used extensively in Japan for over 10 years. This steel has unique physical and bond characteristics. Over 430,000 metric tons of this type of steel have been used to date in Japan, mostly in prestressed concrete cylinder piles. The paper describes the bond characteristics of the steel determined by pullout tests, bond transmission tests, and flexural bond tests. The tests indicate that for an 11 mm bar of this type, bond characteristics are similar to a 7/l 6 in. seven-wire strand which has comparable ultimate strength.
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