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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: Test Methods for Durability of Polymeric Fibers in Concrete and UV Light Exposure
Author(s): P. Balaguru and K. Slattum
Publication: Special Publication
Appears on pages(s): 115-136
Keywords: accelerated tests; cracking (fracturing); durability; electron microscopes; esters; fiber reinforced concretes; flexural tests; nylon fibers; polypropylene fibers; tensile strength; toughness; Materials Research
Abstract:Presents two test methods that can be used for evaluating durability of polymeric fibers subjected to alkaline environment present in concrete and UV light exposure. The test methods were used to evaluate three polymeric fibers: nylon, polypropylene, and polyester. Durability of the fibers in an alkaline environment was ascertained by measuring the flexural toughness of fiber reinforced concrete specimens that had been aged in lime saturated water maintained at 50 C. The UV light exposure test was conducted at a temperature of 65 C with intermittent water spray. The wet spray was used to simulate conditions in the field. Durability of the fibers was determined by measuring the retained tensile strength of the fibers after light exposure and by observing the surface characteristics of fibers under a microscope. The test results indicate that nylon and polypropylene fibers are durable in the alkaline environment present in concrete. The nylon fibers, which were light stabilized, were determined to be stable under UV light exposure. Polypropylene fibers deteriorated under UV light; the deterioration of the polypropylene single filament fibers was more rapid than for the fibrillated fibers. Hence, these fibers should not be used in applications in which the fiber contribution is needed at cracked-exposed sections.
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