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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: Shear Strengthening of Reinforced Concrete Beams Using Externally Applied Composite Fabrics
Author(s): Michael J. Chajes, Ted F. Januszka, Dennis R. Mertz, Theodore A. Thomson, Jr., and William W. Finch, Jr.
Publication: Structural Journal
Appears on pages(s): 295-303
Keywords: adhesives; beams (supports); bonding; composite materials; epoxy resins; reinforced concrete; reinforcing materials; shear strength; tests; Structural Research
Abstract:A series of twelve under-reinforced concrete T-beams was tested to study the effectiveness of using externally applied composite fabrics as a method of increasing a beam's shear capacity. Woven composite fabrics made of aramid, E-glass, and graphite fibers were bonded to the web of the T-beams using a two-component epoxy. The three different fabrics were chosen to allow various fabric stiffnesses and strengths to be studied. The beams were tested in flexure, and the performance of eight beams with external shear reinforcement was compared to results of four control beams with no external reinforcement. All the beams failed in shear and those with composite reinforcement displayed excellent bond characteristics. For the beams with external reinforcement, increases in ultimate strength of 60 to 150 percent were achieved.
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