Durability modeling of reinforcement corrosion in cracked concrete structures

Title: Durability modeling of reinforcement corrosion in cracked concrete structures
Author(s): Kefei Li, Bruno Capra, Olivier Bernard
Paper category : conference
Book title: International RILEM Symposium on Concrete Science and Engineering: A Tribute to Arnon Bentur
Editor(s): J. Weiss, K. Kovler, J. Marchand, and S. Mindess
Print-ISBN: None
e-ISBN: 2912143926
Publisher: RILEM Publications SARL
Publication year: 2004
Nb references: 13
Language: English

Abstract: The impact of steel corrosion on the durability of reinforced concrete structures has since a long time been a major concern in civil engineering. The main electrochemical mechanisms of the steel corrosion have been identified in a concrete environment. The material and structure degradation is attributed to the progressive formation of an expansive corrosion product at the steel-concrete interface. To assess quantitatively the structure lifetime, a two-stage service life model has been accepted widely. So far, the research attention is mainly given to the corrosion in an uncracked concrete. However, practically one is often confronted to the reinforcement corrosion in an already cracked concrete. How to quantify the corrosion risk is of great interest for the long term durability of these cracked structures. To this end, this paper proposes a new service life modeling for the corrosion process by carbonation in a cracked concrete. Some recent experimental investigations are used to calibrate the new models. Then, the models are applied to a shell structure to quantify the corrosion process and determine the optimal maintenance strategy. At last, several conclusions are given for the structure durability assessment.

Online publication: 2004-03-25
Classification: Corrosion
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.062