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    Volume 6, Issue 2 (July 2017)

    Special Issue Paper

    Applicability of Ultrasonic Measurement on the Monitoring of the Setting of Cement Pastes: Effect of Water Content and Mineral Additions

    (Received 19 September 2016; accepted 13 March 2017)

    Published Online: 2017

    CODEN: ACEMOAD

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    Abstract

    Until now, standardized methods developed for the detection of initial and final setting time of cement paste were destructive and non-continuous. The well-established ultrasonic pulse transmission velocity (UPV) method can be correlated to the setting process of cement-based materials by the measurement of P-waves. However, S-waves seem to be better indicators of the setting of cement-based materials, because they are more sensitive to the solid matrix connectivity and less dependent to the air content. A new methodology, based on the combined monitoring of P-waves and S-waves, has already been developed to determine the setting times of mortar and concrete. The purpose of this study is to extend this methodology to cement pastes. Ordinary portland cement pastes with three water/cement ratio between 0.3 and 0.5 have been investigated. In addition, a portland cement, blast-furnace slag and limestone filler blended cement paste with a 0.4 water/cement ratio is studied in order to validate all observations. This study shows that the dynamic elastic properties can be linked to the initial and final setting times of cement paste. The early age evolution of the elastic properties depends on the air content and the binder nature. The combined monitoring of P-waves and S-waves provide accurate indicators of the setting process.

    Author Information:

    Mohamed, Mohamed Saleh
    Université Libre de Bruxelles, BATir Department, Civil Engineering Laboratory, Brussels,

    Carette, Jérôme
    Université Libre de Bruxelles, BATir Department, Civil Engineering Laboratory, Brussels,

    Delsaute, Brice
    Université Libre de Bruxelles, BATir Department, Civil Engineering Laboratory, Brussels,

    Staquet, Stéphanie
    Université Libre de Bruxelles, BATir Department, Civil Engineering Laboratory, Brussels,


    Stock #: ACEM20160062

    ISSN:2379-1357

    DOI: 10.1520/ACEM20160062

    Author
    Title Applicability of Ultrasonic Measurement on the Monitoring of the Setting of Cement Pastes: Effect of Water Content and Mineral Additions
    Symposium ,
    Committee C09