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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: Impulse Testing of Concrete Beams
Author(s): F. T. Mavis and F. A. Richards
Publication: Journal Proceedings
Appears on pages(s): 93-102
Keywords: no keywords
Abstract:The purpose of this study was to find out whether reinforced concrete beams that are identical except for grade of reinforcement behave alike or differently under identical impulses; and if they behave differently, how much-and why? Structural-grade bars, and hard-grade bars that had heen rolled with identical deformations from a billet of rail steel, were obtained from the same manufacturer. Reams were cast in gang molds with structural-grade and hard-grade bars alternating in adjacent beams. After the preliminary tests, concrete was supplied by truck mixer in large enough quantities so there should be no question about uniformity of concrete in any one batch. A new testing machine was designed and built to apply identical impulses to two beams in any given test, and instruments and methods wrro devised to record what happened at, any instant during a test. Things that occured simultaneously were recorded photographically at a rate of 64 exposures a second; and charts were synchronized to shorn load-deflection-time data with comparable precision.
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