Field determination of critical chloride content for depassivation of steel

Title: Field determination of critical chloride content for depassivation of steel
Author(s): O. Vennesland
Paper category : conference
Book title: Third International RILEM Workshop on Testing and Modelling Chloride Ingress into Concrete
Editor(s): C. Andrade and J. Kropp
Print-ISBN: 2-912143-48-9
e-ISBN: 2912143578
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 417 - 421
Total Pages: 5
Nb references: 2
Language: English

Abstract: A method is described for detecting the chloride concentration in concrete that causes initiation of corrosion (depassivation of the reinforcement) at a certain location in a particular structure. The method is based upon detecting areas where the embedded steel is depassivated (corrosion is initiated) by electrochemical techniques and determining the chloride content of the concrete close to the steel. Areas of depassivation might be found by potential mapping or by corrosion rate measurements on the surface of the concrete structure. The critical chloride content might be found in locations where there are no visible damages but where the electrochemical measurements show that corrosion has been initiated. The chloride content might be determined by use of a chloride profile, by analysing drilled cores or by analysing concrete that is removed by chiselling.

Online publication: 2002-12-15
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143578.027