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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: An Ultrasonic Method of Deterioration and Cracking in Concrete Structures
Author(s): J. R. Leslie abd W. J. Cheesman
Publication: Journal Proceedings
Appears on pages(s): 17-36
Keywords: no keywords
Abstract:A new method and apparatus for field and laboratory testing of concrete is described. The appartus is called the "Sonicscope" was originally designed to detect internal cracks in concrete. It develops pulses of ultrasonic sound in the material and measures the velocity of their transmission through it. This pulse velocity has the unique advantage of being independent of the size and shape of the body under test. Measurements can be made with equal facility in mass concrete, slabs or laboratory specimens. The existance and extent of internal cracks and depth of visible surface cracks can be determined by the use of this apparatus. The velocity has been found, by experiment, to be a reliable measure of the condition of the concrete and is particularly useful in deterioration studies. The dynamic modulus can be calculated from this velocity, and values so obtained are found to agree closely with the results of the tests using established methods.
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