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A development of multi-Species mass transport model considering thermodynamic phase equilibrium
Technical University of Denmark, Denmark.
2008 (English)In: International RILEM Symposium on Concrete Modelling - ConMod '08 / [ed] E. Schlangen and G. De Schutter, Rilem publications, 2008, 543-550 p.Conference paper, Published paper (Other academic)
Abstract [en]

In this paper, a multi-species mass transport model, which can predict time dependent variation of pore solution and solid-phase composition due to the mass transport into the hardened cement paste, has been developed. Since most of the multi-species models established previously, based on the Poisson-Nernst-Planck theory, did not involve the modeling of chemical process, it has been coupled to thermodynamic equilibrium model in this study. By the coupling of thermodynamic equilibrium model, the multi-species model could simulate many different behaviours in hardened cement paste such as: (i) variation in solid-phase composition when using different types of cement, (ii) physicochemical evaluation of steel corrosion initiation behaviour by calculating the molar ratio of chloride ion to hydroxide ion [Cl]/[OH] in pore solution, (iii) complicated changes of solid-phase composition caused by the penetration of mineral salts during marine seawater exposure conditions. Those phenomena in concrete can be predicted using the coupled multi-species mass transport model and the thermodynamic equilibrium model described in this paper.

Place, publisher, year, edition, pages
Rilem publications, 2008. 543-550 p.
National Category
Construction Management
Identifiers
URN: urn:nbn:se:lnu:diva-48726ISBN: 978-2-35158-060-8 (print)OAI: oai:DiVA.org:lnu-48726DiVA: diva2:893473
Conference
nternational RILEM Symposium on Concrete Modelling - ConMod '08
Available from: 2016-01-12 Created: 2016-01-12 Last updated: 2016-01-18Bibliographically approved

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  • apa
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