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Characterization of distributed damage in mortars using a nonlinear acoustic technique

Chen, J. / Jayapalan, A.R. / Kim, J.Y. / Kurtis, K.E. / Jacobs, L.J.

In this work, a developed nonlinear acoustic method - nonlinear impact resonance acoustic spectroscopy (NIRAS) is used to characterize the distributed microcracks in mortars. A nonlinear parameter related to hysteresis effect of cement-based materials is selected as the representative parameter of NIRAS technique. The NIRAS technique is applied in differentiating four different groups of mortar samples with varying damage state. Results from NIRAS technique are compared to the results from linear pulse velocity measurements and show a substantial better sensitivity, particularly at the early stage of damage. In addition, the variation trend of nonlinear parameter defined in NIRAS technique is correlated to accompanying petrographic analysis of the micro-structure of mortar samples.

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Characterization of distributed damage in mortars using a nonlinear acoustic technique

Chen, J. / Jayapalan, A.R. / Kim, J.Y. / Kurtis, K.E. / Jacobs, L.J.

In this work, a developed nonlinear acoustic method - nonlinear impact resonance acoustic spectroscopy (NIRAS) is used to characterize the distributed microcracks in mortars. A nonlinear parameter related to hysteresis effect of cement-based materials is selected as the representative parameter of NIRAS technique. The NIRAS technique is applied in differentiating four different groups of mortar samples with varying damage state. Results from NIRAS technique are compared to the results from linear pulse velocity measurements and show a substantial better sensitivity, particularly at the early stage of damage. In addition, the variation trend of nonlinear parameter defined in NIRAS technique is correlated to accompanying petrographic analysis of the micro-structure of mortar samples.

Characterization of distributed damage in mortars using a nonlinear acoustic technique

Chen, J. / Jayapalan, A.R. / Kim, J.Y. / Kurtis, K.E. / Jacobs, L.J.

In this work, a developed nonlinear acoustic method - nonlinear impact resonance acoustic spectroscopy (NIRAS) is used to characterize the distributed microcracks in mortars. A nonlinear parameter related to hysteresis effect of cement-based materials is selected as the representative parameter of NIRAS technique. The NIRAS technique is applied in differentiating four different groups of mortar samples with varying damage state. Results from NIRAS technique are compared to the results from linear pulse velocity measurements and show a substantial better sensitivity, particularly at the early stage of damage. In addition, the variation trend of nonlinear parameter defined in NIRAS technique is correlated to accompanying petrographic analysis of the micro-structure of mortar samples.

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Title:

Characterization of distributed damage in mortars using a nonlinear acoustic technique

Additional title:

Charakterisierung der Schadensverteilung in mÖrtel mittels nichtlinearer akustischen Technik

Contributors:

Chen, J. (author) / Jayapalan, A.R. (author) / Kim, J.Y. (author) / Kurtis, K.E. (author) / Jacobs, L.J. (author)

Published in:

QNDE, Review of Progress in Quantitative Nondestructive Evaluation, 36 ; 1517-1524

AIP Conference Proceedings ; 1211

Publication date:

2009

Size:

8 Seiten, 5 Bilder, 13 Quellen

ISBN:

978-0-7354-0748-0

ISSN:

Type of media:

Conference paper

Type of material:

Storage medium

Language:

English

Keywords:

zerstörungsfreie Prüfung , Schlagbeanspruchung , Frequenzspektrum , Resonanz , akustische Spektroskopie , nichtlinearer Effekt , Mörtel , Petrographie

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