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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: The Bond Strength Of Rusted Deformed Bars
Author(s): Bruce Johnston And Kenneth C. Cox
Publication: Journal Proceedings
Appears on pages(s): 57-72
Abstract:Results of about 420 bond pull-out tests on deformed bar specimens of 78 different sizes or degrees of rust are reported - three different series. In the first, bars were selected from a stockpile and were classified as to degree of rust. Although these bars were of thesame nominal size and type it was found that small differences in the size of lug produced a greater dif- ference in test results than the degree of rust. In the second series, deformed bars of different sizes cut from identical stock were stored both in a moist room and out of doors in an exposed position, The time of exposure was a variable and the maximum time for the out-of-door exposed specimens was I5 months. The third series of tests consisted of bars exposed out of doors as a check test on the results of the second series.
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