Volume 36, Issue 2 (March 2008)

    Ultrasonic Testing of Concrete Structures Using Indirect Transmission

    (Received 23 March 2007; accepted 10 October 2007)

    Published Online: 2007

    CODEN: JTEOAD

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    Abstract

    Laboratory studies and computer simulation were used to develop a procedure for the interpretation of the results of nondestructive testing of concrete structures using the indirect transmission method. The results of the laboratory studies indicate a 10-cm spacing is best for making ultrasonic pulse measurements. A new method of calculating the velocity of the pulse is presented. The method enables concrete quality to be evaluated over short distances rather than the existing method which gives a mean velocity over an extended distance. The method can thus determine the extent of delamination of concrete at a specific location. The laboratory analyses verified using computer simulations show the effect of concrete heterogeneity on the detection of variation in concrete quality. Ultrasonic pulse velocities have a coefficient of variation of about 2 %.


    Author Information:

    Stergiopoulou, Christina
    Research Assistant and Professors, Department of Civil and Environmental Engineering, University of Maryland, College Park, MD

    McCuen, Richard H.
    Research Assistant and Professors, Department of Civil and Environmental Engineering, University of Maryland, College Park, MD

    Aggour, M. Sherif
    Research Assistant and Professors, Department of Civil and Environmental Engineering, University of Maryland, College Park, MD


    Stock #: JTE101158

    ISSN: 0090-3973

    DOI: 10.1520/JTE101158

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    Author
    Title Ultrasonic Testing of Concrete Structures Using Indirect Transmission
    Symposium , 0000-00-00
    Committee C09