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Communication Dans Un Congrès Année : 2012

Coda Wave Interferometry (CWI) for monitoring early-age cementitious mortar

Résumé

The hardening procedure of a cement-based mortar (mixed by cement past and uni- dimension glass beams) is studied with Coda Wave Interferometry (CWI) for a hydration time between 8 and 70 hours. Due to the continuous hydration of the cement paste, the hardening procedure involves not only a fast evolution of elastic properties, but also a autogenous shrinkage which can cause local stress and risks of micro-cracking. Traditional ultrasonic method (pulse velocity measurement) can estimate the variation of elastic properties by measuring compressive-wave's propagation velocity. Coda Wave Interferometry (CWI) of multiple scattered waves gives access to a velocity variation dominated by shear- waves. On the other hand, with the confirmed observation of micro-cracks occurring around cement/glass interfaces by Scanning Electronic Microscopy (SEM), we discuss the possibility of using CWI analysis for micro-cracking detection.
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hal-00811105 , version 1 (23-04-2012)

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  • HAL Id : hal-00811105 , version 1

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Yuxiang Zhang, Odile Abraham, Pierre Mounanga, Ali-Nordine Leklou, Vincent Tournat, et al.. Coda Wave Interferometry (CWI) for monitoring early-age cementitious mortar. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00811105⟩
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