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Conference Papers Year : 2015

Influence of water gradient on surface wave measurements in concrete

Abstract

The knowledge of water gradient in cover concrete is of primary importance for the estimation of concrete durability. In this paper the influence of water gradient on surface wave phase velocity dispersion curves is studied on concrete slabs during water absorption and drying. The comparison of surface wave phase velocity dispersion curves measured at various times corresponding to different water gradients shows that surface waves are sensitive to water ingress. Furthermore, taking information from embedded sensors and gammadensimetry, and using master curves established for an homogeneous water content, it is possible to predict the surface wave phase velocities variations. This suggest that, eventhough the variations of surface wave phase velocity are only a few %, the comparison to a reference state should make it possible to follow variation of water gradient.
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Dates and versions

hal-02524147 , version 1 (30-03-2020)

Identifiers

  • HAL Id : hal-02524147 , version 1

Cite

Odile Abraham, Metais Vincent, Géraldine Villain, Guy Plantier, Alain Le Duff, et al.. Influence of water gradient on surface wave measurements in concrete. International Symposium Non-Destructive Testing in Civil Engineering (NDTCE 2015), Sep 2015, Berlin, Germany. ⟨hal-02524147⟩
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