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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: Steel Fiber Reinforced and Plain Concrete: Factors Influencing Flexural Strength Measurement
Author(s): Colin D. Johnston
Publication: Journal Proceedings
Appears on pages(s): 131-138
Keywords: fiber reinforced concretes; flexural strength; flexural tests; loads (forces); plain concrete; span-depth ratio; specimens; standards; statistical analysis; strength analysis; structural design.
Abstract:The development of standards for testing fiber reinforced concrete is a current concren to many involved with the desing and use of the material. Because of its increased use in forms of construction where flexural performance is important, eg. pavement, a standard for flexural testing of fiber reinforced concrete is urgently needed. The major factors influencing flexural strength measurement are identified, i.e., specimen span, width, depth, and ode of loading. It is hown how these factors can be accounted for by a single parameter that represents the volume of material in a definable zone of probable material failure. Analysis of the author's expeimental data and comparable data from other sources shows the variation of flexural strength with this volume parameter to be similar for both fiber reinforced and plain concretes. A relationshp is developed which permits the flexural strength in any testing relationship to be predicted from the value obtained in any other arangement. The strength of a 18 x 6 x 6 in. (450 x 150 x 10 mm) specimen tested under third-point loading is used as a reference.
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