Title: Detection of the reinforcement corrosion in pre-stressed concrete girders

Authors: Marta Korenska, Lubos Pazdera, Karel Pospisil

Addresses: Faculty of Civil Engineering, Department of Physics, Brno University of Technology, Zizkova 17, 602 00 Brno, Czech Republic. ' Faculty of Civil Engineering, Department of Physics, Brno University of Technology, Zizkova 17, 602 00 Brno, Czech Republic. ' Department of Infrastructure, Transport Research Centre, Lisenska 33a, 636 00 Brno, Czech Republic

Abstract: Pre-stressed reinforcement is a basic element of the structural stability in a great amount of concrete structures. The corrosion of reinforcement is a major cause of a failure of such structures. The paper deals with the usage of the acoustic emission method for testing pre-stressed concrete girders from corrosive damage point of view. The experimental test investigated acoustic emission method to evaluate deterioration of pre-stressed reinforced concrete girders during flexural tests under loadings. The result provide that acoustic emission was very sensitive to detect the initiation of microcracks generated near the interface between the pre-stressed reinforcement and concrete.

Keywords: concrete girders; pre-stressed reinforcement; corrosive damage; flexural tensile stress; acoustic emission; reinforcement corrosion; nondestructive testing; NDT; microcracks; microstructure.

DOI: 10.1504/IJMMP.2006.011652

International Journal of Microstructure and Materials Properties, 2006 Vol.1 No.3/4, pp.374 - 382

Published online: 07 Dec 2006 *

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