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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: Fatigue and Static Tests of Steel Strand Prestressed Beams of Expanded Shale Concrete and Conventional Concrete*
Author(s): Gene M. Nordby and William J. Venuti
Publication: Journal Proceedings
Appears on pages(s): 141-160
Keywords: no keywords
Abstract:Tests on 27 beams cast from conventional and expanded shale aggregate concrete, prestressed with steel strand, are discussed. Fatigue tests at various load ranges and number of cycles of load repetition were performed on matched beams manufactured from both aggregates. Steel fatigue failures occurred in three specimens while the other 24 beams performed satisfactorily under fatigue loading. The three fatigue failures occurred when the beams were severely cracked during the repetitive loading; this failure was a result of stress concentrations and abrasion between the strands and the concrete. Those specimens undamaged by the fatigue loading were tested statically to failure, and either flexure or bond failures were recorded. The bond failures indicated that embedment length was the governing factor against failure rather than bond stress as computed from conventional equations.
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