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|Title: ||Cover zone properties influencing acoustic emission due to corrosion|
|Authors: ||Ing, Matthew|
Austin, Simon A.
|Issue Date: ||2005|
|Publisher: ||© Elsevier|
|Citation: ||ING, M., AUSTIN, S. A. and LYONS, R., 2005. Cover zone properties influencing acousitc emission due to corrosion. Cement and concrete research, 35 (2), pp 284- 295 [doi:10.1016/j.cemconres.2004.05.006]|
|Abstract: ||The deterioration of reinforced concrete is a serviceability problem world-wide. The
cover zone plays an important role in the durability and serviceability of concrete and
provides the initial barrier to aggressive species. The research presented investigates
the potential of acoustic emission (AE) as a means of identifying corrosion at an early
stage, before any significant cover damage has occurred. The purpose of part of the
study was to identify the influential cover zone factors that affect the magnitude of the
acoustic emission measurements per gram of steel loss. Prisms with various
combinations of strength, cover thickness, aggregate and rebar diameters were studied
to ascertain the important variables likely to be encountered on reinforced structures.
The experimental results confirmed that early corrosion, verified by internal visual
inspection and mass loss, can be detected by AE and before any external signs of
cracking. They also show that the most influential parameter affecting the AE
measurement is concrete strength, being exponentially related to the AE Energy.
Material properties such as cover thickness had a negligible effect on AE Energy
during the initial stages of reinforcement corrosion, whereas from this initial work, the
rebar diameter indicated a promising relationship with AE Energy per gram of steel
|Description: ||This is a journal article. It was published in the journal, Cement and concrete research [© Elsevier] and the definitive version is available at: http://www.sciencedirect.com/science/journal/00088846|
|Appears in Collections:||Published Articles (Architecture, Building and Civil Engineering)|
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