Using X-Ray Absorption to Assess Moisture Movement in Cement-Based Materials

    Volume 6, Issue 9 (October 2009)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 30 July 2009

    Page Count: 15


    Sant, Gaurav
    Research Assistant, School of Civil Engineering, Purdue Univ., West Lafayette, IN

    Weiss, Jason
    Professor, Associate Head, School of Civil Engineering, Purdue Univ., West Lafayette, IN

    (Received 14 November 2008; accepted 30 June 2009)

    Abstract

    This paper discusses the use of x-ray absorption as a technique for measuring fluid transport in cementitious systems. First, the paper describes how a material’s x-ray attenuation spectrum can be combined with composite modeling concepts to determine the extent of moisture movement (wetting or drying) that can be measured in cementitious systems. Second, the paper discusses the influence of beam power (voltage and current) and camera integration time on the variation in the measured x-ray intensity. Third, the paper discusses two devices for measuring the transmitted x-ray intensity (camera and detector) to describe differences in their measurements and resolution. Finally, a demonstration is provided to show how x-ray absorption can be used to detect moisture ingress and determine the transport properties of the material under evaluation.


    Paper ID: JAI102234

    DOI: 10.1520/JAI102234

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    Author
    Title Using X-Ray Absorption to Assess Moisture Movement in Cement-Based Materials
    Symposium , 0000-00-00
    Committee C09