Embedded Cement-Based Piezoelectric Sensors for Acoustic Emission Detection in Concrete
Publication: Journal of Materials in Civil Engineering
Volume 22, Issue 12
Abstract
In this research, the feasibility of using embedded cement-based piezoelectric sensors to detect the acoustic emission (AE) activities in concrete has been studied. A sensor is presented that is made with the 0–3 cement-based piezoelectric composite as sensing element. The composite is formed by pressing mixed cement-piezoelectric powder into a penny-shaped thin plate. In the terminology of 0–3, 0 represents the dimension of the piezoelectric particle and 3 stands for the dimensions of the matrix. By adjusting the dosage of the piezoelectric ceramic powder, the properties of the composite can be tailored to suit designated applications. Sensors made of the composite (0–3 sensor) are able to be embedded into concrete and have broadband frequency response. It is shown by a four-point bending test on a concrete beam that the sensors have excellent ability in AE activity detection. High sensitivity is also observed for the embedded sensors.
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Acknowledgments
The writers gratefully acknowledge the financial support of key project from National Natural Science Foundation of China (Grant No. NNSFC50838008) and the grant from Hong Kong Research Grant Council (Grant No. UNSPECIFIEDN_HKUST637/09).
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 22 • Issue 12 • December 2010
Pages: 1323 - 1327
Copyright
© 2010 ASCE.
History
Received: Oct 29, 2009
Accepted: Jun 3, 2010
Published online: Jun 8, 2010
Published in print: Dec 2010
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