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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: Durability and Behavior of Pretensioned Beams
Author(s): Edwin C. Roshore
Publication: Journal Proceedings
Appears on pages(s): 811-846
Abstract:To develop data on the factors affecting the durability of pretensioned concrete beams, 28 large beams containing pretensioning strands and 412 small companion specimens without pretnsioning strands were fabricated. The concrete in 22 of the beams was air-entrained; that in the other six was not. An appendix presents computations used in designing the beams. Some of the beams were subjected to laboratory tests, which indicated that the air-entrained beams showed less average camber and less midspon deflection, but the non-air-entrained beams withstood greater average flexural loads. A number of the auxiliary specimens were also tested in the laboratory to determine the strength, elastic, and plastic properties of the concrete. Some specimens were exposed to natural weathering. A few early results ore noted.
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