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Sensors 2010, 10(5), 5193-5208; doi:10.3390/s100505193

A Reusable PZT Transducer for Monitoring Initial Hydration and Structural Health of Concrete

School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
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Received: 19 March 2010 / Revised: 18 May 2010 / Accepted: 18 May 2010 / Published: 25 May 2010
(This article belongs to the Special Issue Advances in Transducers)
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Abstract

During the construction of a concrete structure, strength monitoring is important to ensure the safety of both personnel and the structure. Furthermore, to increase the efficiency of in situ casting or precast of concrete, determining the optimal time of demolding is important for concrete suppliers. Surface bonded lead zirconate titanate (PZT) transducers have been used for damage detection and parameter identification for various engineering structures over the last two decades. In this work, a reusable PZT transducer setup for monitoring initial hydration of concrete and structural health is developed, where a piece of PZT is bonded to an enclosure with two bolts tightened inside the holes drilled in the enclosure. An impedance analyzer is used to acquire the admittance signatures of the PZT. Root mean square deviation (RMSD) is employed to associate the change in concrete strength with changes in the PZT admittance signatures. The results show that the reusable setup is able to effectively monitor the initial hydration of concrete and the structural health. It can also be detached from the concrete for future re-use. View Full-Text
Keywords: electromechanical impedance (EMI); structural health monitoring (SHM); PZT; hydration; concrete; reusable electromechanical impedance (EMI); structural health monitoring (SHM); PZT; hydration; concrete; reusable
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Yang, Y.; Divsholi, B.S.; Soh, C.K. A Reusable PZT Transducer for Monitoring Initial Hydration and Structural Health of Concrete. Sensors 2010, 10, 5193-5208.

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