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Open AccessArticle

Acoustic Emission Behavior of Early Age Concrete Monitored by Embedded Sensors

by Lei Qin 1,*, Hong-Wei Ren 2, Bi-Qin Dong 3,* and Feng Xing 3
1
School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China
2
School of Electrical Engineering, University of Jinan, Jinan 250022, China
3
School of Civil Engineering, Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China
*
Authors to whom correspondence should be addressed.
Materials 2014, 7(10), 6908-6918; https://doi.org/10.3390/ma7106908
Received: 1 April 2014 / Revised: 22 July 2014 / Accepted: 12 September 2014 / Published: 2 October 2014
Acoustic emission (AE) is capable of monitoring the cracking activities inside materials. In this study, embedded sensors were employed to monitor the AE behavior of early age concrete. Type 1–3 cement-based piezoelectric composites, which had lower mechanical quality factor and acoustic impedance, were fabricated and used to make sensors. Sensors made of the composites illustrated broadband frequency response. In a laboratory, the cracking of early age concrete was monitored to recognize different hydration stages. The sensors were also embedded in a mass concrete foundation to localize the temperature gradient cracks. View Full-Text
Keywords: acoustic emission; piezoelectric composites; early age concrete; mass concrete; cracking acoustic emission; piezoelectric composites; early age concrete; mass concrete; cracking
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Qin, L.; Ren, H.-W.; Dong, B.-Q.; Xing, F. Acoustic Emission Behavior of Early Age Concrete Monitored by Embedded Sensors. Materials 2014, 7, 6908-6918.

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