Numerical simulation of multi-species diffusion

A numerical model has been developed to simulate the transport of several ionic species across a saturated concrete or mortar sample. The chloride binding as well as the electrical coupling between the different ionic fluxes are included in the model by using the Nernst-Planck system of equations. T...

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Bibliographic Details
Published in:Materials and structures 2000-11, Vol.33 (233), p.566-573
Main Authors: TRUC, O, OLLIVIER, J.-P, NILSSON, L.O
Format: Article
Language:English
Subjects:
Applied sciences
Building construction
Building materials
Buildings. Public works
Chlorides
Civil engineering
Computation methods. Tables. Charts
Computer simulation
Concretes. Mortars. Grouts
Corrosion
Diffusion
Durability. Pathology. Repairing. Maintenance
Exact sciences and technology
Fluxes
Materials
Mathematical analysis
Mathematical models
Mortars
Penetration
Properties and performance tests of mortar and hardened concrete
Structural analysis. Stresses
Studies
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Summary:A numerical model has been developed to simulate the transport of several ionic species across a saturated concrete or mortar sample. The chloride binding as well as the electrical coupling between the different ionic fluxes are included in the model by using the Nernst-Planck system of equations. This model highlights which parameters affect substantially chloride penetration into reinforced concrete structures and then shows that the use of Fick's first law in a predictive model for chloride penetration is strongly challenged. The simulations are in good agreement with diffusion-cell experiments and membrane potential measurements.[PUBLICATION ABSTRACT]
ISSN:1359-5997
1871-6873
DOI:10.1007/bf02480537