Monitoring the corrosion of concrete reinforcement using control curves

Birblis, N., Cherry, B. W., Gerritsen, B. and Forsyth, M. 2002, Monitoring the corrosion of concrete reinforcement using control curves, in 9th international conference on durability of materials and components, The Conference, Rotterdam, Netherlands, pp. 1-6.

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Title Monitoring the corrosion of concrete reinforcement using control curves
Author(s) Birblis, N.
Cherry, B. W.
Gerritsen, B.
Forsyth, M.ORCID iD for Forsyth, M.
Conference name International Conference on Durability of Building Materials and Components (9th : 2002 : Brisbane, Qld.)
Conference location Brisbane, Qld.
Conference dates 17-20 Mar. 2002
Title of proceedings 9th international conference on durability of materials and components
Editor(s) Burn, Stewart
Bennett, Adrian
Publication date 2002
Start page 1
End page 6
Publisher The Conference
Place of publication Rotterdam, Netherlands
Keyword(s) Corrosion in concrete
Reinforcing steel
Polarisation resistance
Control curve
Summary Corrosion testing (half-cell and LPR) was carried out on a number reinforced concrete panels which had been taken from the fascia of a twenty five year old high rise building in Melbourne, Australia. Corrosion, predominantly as a result of carbonation of the concrete, was associated with a limited amount of cracking. A monitoring technique was established in which probe electrodes (reference and counter) were retro-fitted into the concrete. The probe electrode setup was identical for all panels tested. It was found that the corrosion behaviour of all panels tested closely fitted a family of results when the corrosion potential is plotted against the polarisation resistance (Rp). This enabled the development of a so-called 'control curve' relating the corrosion potential to the Rp for all of the panels under investigation. This relationship was also confirmed on laboratory samples, indicating that for a fixed geometry and experimental conditions a relationship between the potential and polarisation resistance of steel can be established for the steel-concrete system. Experimental results will be presented which indicate that for a given monitoring cell geometry, it may be possible to propose criteria for the point at which remediation measures should be considered. The establishment of such a control curve has enabled the development of a powerful monitoring tool for the assessment of a number of proposed corrosion remediation techniques. The actual effect of any corrosion remediation technique becomes clearly apparent via the type and magnitude of deviation of post remediation data from the original (preremediation) control curve.
Notes Paper 257
Language eng
Field of Research 091299 Materials Engineering not elsewhere classified
Socio Economic Objective 870301 Cement and Concrete Materials
HERDC Research category E2.1 Full written paper - non-refereed / Abstract reviewed
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