Volume 10, Issue 1 (July 1988)

    Modification of the X-Radiography Technique to Include a Contrast Agent for Identifying and Studying Microcracking in Concrete

    CODEN: CCAOAD

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    Abstract

    The utility of X-radiography for the study of microcracking in concrete is significantly enhanced by impregnating cracks and voids with a lead-nitrate contrast agent. When an X-ray flux is passed through a polished concrete specimen, X-rays are readily attenuated by the contrast agent in the cracks, which produces a sharp tonal contrast in the resulting radiograph between cracks and surrounding concrete. Radiographs obtained using this technique are compared with more conventional X-ray images of the same specimens. This method is similar in concept to neutron radiography, in which a neutron-attenuating contrast agent is used for enhancing crack images.


    Author Information:

    Hover, KC
    Associate professor, Cornell University, Ithaca, NY

    Najjar, WS
    Assistant professor, Northeastern University, Boston, MA


    Stock #: CCA10026J

    ISSN: 0149-6123

    DOI: 10.1520/CCA10026J

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    Author
    Title Modification of the X-Radiography Technique to Include a Contrast Agent for Identifying and Studying Microcracking in Concrete
    Symposium , 0000-00-00
    Committee C09