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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: An Assurance Criterion for Flexural Bond
Pretensioned Hollow Core Units
Author(s): Arthur R. Anderson and Richard G. Anderson
Publication: Journal Proceedings
Appears on pages(s): 457-464
Keywords: anchorage (structural) : bond (concrete to reinforcement); bonding; flexural strength: hollow core slabs: nondestructive tests: precast concrete; prestressed concrete; prestressing steels; postensioning; quality control; slippage.
Abstract:This paper reports the results of tests on 36 factory-produced hollow core units of spans ranging from 8 to 20 ft. The purpose of the test program was to investigate the flexural bond performance of routinely-produced precast-prestressed products. The specimens were obtained from five different plants on the West Coast. The tests indicate that the overwhelming majority of such members can be expected to meet or exceed the limiting tension in prestressing steel established by the bond development criteria of Section 12.1 1.1, ACI 3 I8-71. Evidence is presented showing a reserve of strength beyond the level of general bond failure, even under repeated load applications. A simple, nondestructive assurance procedure is proposed by which the quality of bond can be monitored within precasting plants. Production problems which may lead to poor bond between prestressing steel and concrete are discussed.
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