2D-analysis of chloride ingress in the tidal zone of marine concrete structures

Title: 2D-analysis of chloride ingress in the tidal zone of marine concrete structures
Author(s): S.J.H. Meijers, E. Schlangen
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: 9
Language: English

Abstract: Durability of concrete structures is not anymore only a concern for existing older structures, but nowadays it already gets a lot of attention during the design phase. It is well-known that chloride ingress in concrete is one of the main causes of reinforcement corrosion. Hence several models for chloride ingress in concrete have been put forward to facilitate the evaluation of the durability of concrete structures. In the present paper a computational model in which chloride ion transport is linked to heat and moisture transport, is described and applied. It is applied to a situation in which concrete is simultaneously wetted and dried, such as in the splash and tidal zone. A 2-dimensional analysis of chloride ingress has been performed and from the computational results it has been concluded that so-called ‘wick action’ can be simulated by the software, that the drying above the water-level enhances the chloride ingress below the water-level, and that accumulation of chloride ions occurs just above the water-level behind the drying face. The developed software enables the computational processing of complex environmental conditions with respect to chloride ingress and thus a sophisticated assessment of the durability of new or existing concrete structures.

Online publication: 2004-03-25
Classification: Transport
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143926.045