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A Conceptual Model for Ionic Transport in Cement-based Materials in Conditions of Externally Applied Electric Field

Published online by Cambridge University Press:  27 March 2015

A. Susanto ,
D.A. Koleva ,
E.A.B. Koenders  and
K. van Breugel
A. Susanto
Affiliation:
Faculty of Civil Engineering and Geosciences, Delft University of Technology, Section of Materials and Environment, Stevinweg 1, 2628 CN Delft, The Netherlands.
D.A. Koleva
Affiliation:
Faculty of Civil Engineering and Geosciences, Delft University of Technology, Section of Materials and Environment, Stevinweg 1, 2628 CN Delft, The Netherlands.
E.A.B. Koenders
Affiliation:
Faculty of Civil Engineering and Geosciences, Delft University of Technology, Section of Materials and Environment, Stevinweg 1, 2628 CN Delft, The Netherlands.
K. van Breugel
Affiliation:
Faculty of Civil Engineering and Geosciences, Delft University of Technology, Section of Materials and Environment, Stevinweg 1, 2628 CN Delft, The Netherlands.
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Abstract

The transport properties, i.e. microstructural behavior and mechanisms related to water and ionic transport within the pore network of cement-based materials can be considered as an indicator for durability and to predict service life of concrete structures. Hence, the investigation of ionic transport is very important to asses ionic diffusion and ionic migration that potentially affect microstructural development of the bulk cement-based matrix. External electric fields are commonly accelerating ion (and water) migration. Numerical works on simulation of these phenomena have been reported, however, most of them consider only a constant ionic diffusion coefficient. This paper deals with the application of the Poisson-Nernst-Planck equations to simulate ionic transport in cement-based systems exposed to external electric potential by considering time dependent diffusion coefficient. The simulation involves solving the equation of mass conservation of individual ionic species coupled with electrostatic potential. Profiles of ionic concentrations and ionic distribution in cement-based systems are presented and discussed.

Keywords

compositeelectrical propertiesionic conductor
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1768: Symposium 6D – Concrete with Smart Additives and Supplementary Cementitious Materials to Improve Durability and Sustainability of Concrete Structures. , 2015 , imrc2014-6d-026
Copyright
Copyright © Materials Research Society 2015 

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References

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