Numerical simulation of multi-species transport through saturated concrete during a migration test — MsDiff code

A numerical model, called MsDiff (Multi-Species DIFFusion), based on a finite difference method and on the Nernst–Planck relation has been developed. The concentration profiles for several species (i.e., Cl−, Na+, K+ and OH−), the flux and the potential profile are computed. The simulations allow ha...

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Bibliographic Details
Published in:Cement and concrete research 2000-10, Vol.30 (10), p.1581-1592
Main Authors: Truc, Olivier, Ollivier, Jean-Pierre, Nilsson, Lars-Olof
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Chloride ions
Computation methods. Tables. Charts
Concretes. Mortars. Grouts
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
LMDC test method
Materials
Migration tests
Numerical model
Structural analysis. Stresses
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Summary:A numerical model, called MsDiff (Multi-Species DIFFusion), based on a finite difference method and on the Nernst–Planck relation has been developed. The concentration profiles for several species (i.e., Cl−, Na+, K+ and OH−), the flux and the potential profile are computed. The simulations allow having a better understanding about the phenomena involved during the transport of different ions into concrete under the influence of an electrical field. The effect of various parameters as the pore solution composition, the non-ideality of the solutions or the chloride binding, is also discussed. Finally, it is shown how the effective diffusion coefficient of chlorides could be measured experimentally by using the LMDC test method.
ISSN:0008-8846
1873-3948
DOI:10.1016/S0008-8846(00)00305-7