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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: Nonlinear Ultrasonic Testing with Resonant and Pulse Velocity Parameters for Early Damage in Concrete
Author(s): Jason D. Stauffer, Clinton B. Woodward, and Kenneth R. White
Publication: Materials Journal
Appears on pages(s): 118-121
Keywords: damage; microcracking; testing
Abstract:The objective of this research was to compare the effectiveness of a nonlinear ultrasonic testing method with established ASTM testing methods in detecting early damage in concrete. In this study, geometrically identical concrete specimens were evaluated with nonlinear ultrasonic techniques. These prismatic specimens were of three distinct water-cement ratios. They were compressed at regular load increments to induce damage and ultrasonically tested for fundamental, second, and third harmonics of the original driving frequencies after each load increment. Other additional ASTM tests were performed for comparison. At each load increment, no cracking was visually observed. However, with increases in damage to the specimens, substantial increases in nonlinear parameters were observed. These increases in harmonic ratios were markedly larger as compared with changes noted with other nondestructive ASTM tests performed. This nonlinear ultrasonic method shows considerable promise as a sound, nondestructive evaluation technique for detecting early damage in concrete.
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