Chloride ingress modelling: comparison of experimental and numerical data

Title: Chloride ingress modelling: comparison of experimental and numerical data
Author(s): S. Meijers
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: 329 - 345
Total Pages: 17
Nb references: 7
Language: English

Abstract: The splash zone of marine concrete structures is well known for its high vulnerability to reinforcement corrosion. The ingress of chloride in this zone is determined by the interaction of temperature, moisture and chloride. A model is presented which includes heat transport, moisture absorption and evaporation, distinction between free and bound chlorides, reversible chloride adsorption, chloride ion diffusion and convection. All these features have been wrapped up in a set of three coupled diffusion equations, in which the couplings allow for the various interactions of heat, moisture and chloride ion transport. These highly non-linear equations have been implemented in a monolithic scheme according to the finite element method. The material parameters are a function of cement type and content, degree of hydration and water to cement ratio. The model is evaluated by simulating experimental work in which concrete specimens had been alternately dried and wetted with salty water, both with and without temperature variation. The level of agreement between experimental and numerical data appears to be good, and is likely to be further improved when the effect of carbonation will have been implemented.

Online publication: 2002-12-15
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143578.022