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Diffusion-Based Model for Predicting Chloride Ingress into Road Structures

G. Kapteina*

*Korrespondierende/r Autor/-in für diese Arbeit

Abstract

Chloride transport mechanisms into road structures are multifarious. Because the current level of knowledge is not sufficient to model all relevant transport mechanism, the approach chosen to model chloride ingress should capture the decisive mechanisms involved. Based on this idea, Fick’s 2nd law of diffusion has been selected as the basic physical approach. With this approach the apparent diffusion coefficient is one of the key variables. To improve the accuracy of the approach this variable has been adapted empirically. As for concrete exposed to intermittent splash water the profile may have a maximum content inside, Fick’s 2nd law of diffusion cannot be applied without restrictions. The two published approaches regarding this issue will be discussed and assessed. For the selected approach, the empirical adaptation of the apparent chloride diffusion coefficient has been carried out by evaluation of chloride profiles. The regression variables derived have been quantified stochastically to enable a full-probabilistic calculation of the predicted chloride profile. Finally, an example calculation has been carried out to demonstrate the application of this model within the framework of service life design.
OriginalspracheEnglisch
TitelCONCREEP 2015
UntertitelMechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures
Redakteure/-innenJohann Kollegger, Christian Hellmich, Bernhard Pichler
VerlagAmerican Society of Civil Engineers
Seiten790-799
Seitenumfang10
ISBN (elektronisch)9780784479346
DOIs
PublikationsstatusVeröffentlicht - 1 Jan. 2015
Extern publiziertJa
Veranstaltung10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Vienna, Österreich
Dauer: 21 Sept. 201523 Sept. 2015

Publikationsreihe

NameCONCREEP 2015: Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures - Proceedings of the 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures

Tagung/Konferenz

Tagung/Konferenz10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures
Land/GebietÖsterreich
OrtVienna
Zeitraum21/09/1523/09/15

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