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Practical field measurement of reinforcement corrosion in concrete using linear polarisation methods
Article
Date de parution : 1992
The assessment of reinforcement corrosion in concrete structures before visible cracking and rust stains occur will enable the engineer to take cost effective and timely remedial action. The linear polarisation technique provides a means of assessing directly the rate of active corrosion by measuring the response of the reinforcement to a small perturbative signal. The method has generally been restricted to laboratory studies, due to difficulties in evaluating the region of influence of the test, in allowing for a relatively high concrete resistance, and in the availability of field instrumentation. This paper reports on the development of novel programmable polarisation equipment enabling corrosion rate measurments to be easily collected and stored on site. The results of laboratttory studies on control specimens are compared with those taken from structures in aggressive corrosion environments. Guidance is given on the interpretation of linear polarisation results from durability studies for those unfamiliar with the technique. (Résumé des auteurs. Cop. Non-Destructive Testing Society of Great Britain)
Voir la revue «British journal of non destructive testing»
Autres numéros de la revue «British journal of non destructive testing»