Acoustic Emission Behavior of Early Age Concrete Monitored by Embedded Sensors

Materials

Lei Qin¹  Hong-Wei Ren²  Bi-Qin Dong³ 

[1] School of Civil Engineering and Architecture, University of Jinan, Jinan 250022, China;School of Electrical Engineering, University of Jinan, Jinan 250022, China; E-Mail:;School of Civil Engineering, Guangdong Province Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China; E-Mail:

关键词: acoustic emission;    piezoelectric composites;    early age concrete;    mass concrete;    cracking;   

DOI  :  10.3390/ma7106908

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.