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Critical chloride content - state of the art

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Author: Gaal, G.C.M. · Polder, R.B. · Walraven, J.C. · Veen, C. van der
Publisher: Engineering Technics Press
Place: Edinburgh
Institution: TNO Bouw
Source:Forde, M.C., Proceedings 10th International Conference on Structural Faults and Repair, The Commonwealth Institute, London, England, 1-3 July 2003, 1-8
Identifier: 330582
ISBN: 0-947644-53-9
Keywords: Materials


Deterioration of concrete structures has become an important issue over the last decade. The most fre-quently observed form of deterioration is chloride-initiated corrosion of the reinforcement. Corrosion is initiated when the chloride content at the reinforcement exceeds the critical or threshold chloride content. However the threshold values reported in literature show a tremendous scatter. This paper will describe the chemical processes that take place when corrosion of the reinforcement is initiated. Based on published critical chloride content values, a most likely value of the critical content is suggested