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31 March 2010 Monitoring concrete by means of embedded sensors and electromechanical impedance technique
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This paper describes the use of embedded and surface bonded piezoelectric transducers (PZTs) to monitor concrete by means of the electromechanical impedance (EMI) method. The main objective of the present study is the design and utilization of a rugged and embeddable sensing system capable to monitor curing, stress and damage in concrete structures. Three concrete cylinders with in-house designed sensors were cast and tested. Surface bonded PZT were also used to compare the response of conventional PZT patch to the response of the embedded system. After the conventional 28-days curing, two cylinders were subjected to a compression test and the third cylinder was subjected to induced damage. The EM signatures were processed using a statistical index and a slope gradient. The results show that the sensing system and the EMI method are suitable to monitor curing progression and to detect applied stress, damage onset, and damage propagation.
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Venu Gopal Madhav Annamdas and Piervincenzo Rizzo "Monitoring concrete by means of embedded sensors and electromechanical impedance technique", Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 76471Z (31 March 2010);

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