Modelling of chloride ingress into concrete from a saline environment

Yu Wang; Long Yuan Li; C. L. Page

doi:10.1016/j.buildenv.2005.02.001

Modelling of chloride ingress into concrete from a saline environment

Yu Wang^*, Long Yuan Li, C. L. Page

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A mathematical model previously developed for the simulation of electrochemical chloride removal (ECR) process is utilised to predict the ionic mass transport associated with chloride ingress into concrete or hydrated cement paste from a saline environment by incorporating the convection of pore solution. Compared to the existing models, the present model has advantages in the aspect of numerical calculations as it avoids the difficulty of solving the Poisson equation about electrostatic potential. The significant effects of ionic interaction and the convection of pore solution on the chloride ingress are examined. Simulation results are compared with those obtained from the models using Fick's second law. The comparison shows that the present model is more detailed and accurate. It can be applied to various different cases with unified ionic diffusivities.

Original language	English
Pages (from-to)	1573-1582
Number of pages	10
Journal	Building and Environment
Volume	40
Issue number	12
DOIs	https://doi.org/10.1016/j.buildenv.2005.02.001
Publication status	Published - 1 Dec 2005

Keywords

Chloride ingress
Concrete
Diffusion
Finite element method
Mathematical model

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10.1016/j.buildenv.2005.02.001

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title = "Modelling of chloride ingress into concrete from a saline environment",

abstract = "A mathematical model previously developed for the simulation of electrochemical chloride removal (ECR) process is utilised to predict the ionic mass transport associated with chloride ingress into concrete or hydrated cement paste from a saline environment by incorporating the convection of pore solution. Compared to the existing models, the present model has advantages in the aspect of numerical calculations as it avoids the difficulty of solving the Poisson equation about electrostatic potential. The significant effects of ionic interaction and the convection of pore solution on the chloride ingress are examined. Simulation results are compared with those obtained from the models using Fick's second law. The comparison shows that the present model is more detailed and accurate. It can be applied to various different cases with unified ionic diffusivities.",

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T1 - Modelling of chloride ingress into concrete from a saline environment

AU - Wang, Yu

AU - Li, Long Yuan

AU - Page, C. L.

PY - 2005/12/1

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N2 - A mathematical model previously developed for the simulation of electrochemical chloride removal (ECR) process is utilised to predict the ionic mass transport associated with chloride ingress into concrete or hydrated cement paste from a saline environment by incorporating the convection of pore solution. Compared to the existing models, the present model has advantages in the aspect of numerical calculations as it avoids the difficulty of solving the Poisson equation about electrostatic potential. The significant effects of ionic interaction and the convection of pore solution on the chloride ingress are examined. Simulation results are compared with those obtained from the models using Fick's second law. The comparison shows that the present model is more detailed and accurate. It can be applied to various different cases with unified ionic diffusivities.

AB - A mathematical model previously developed for the simulation of electrochemical chloride removal (ECR) process is utilised to predict the ionic mass transport associated with chloride ingress into concrete or hydrated cement paste from a saline environment by incorporating the convection of pore solution. Compared to the existing models, the present model has advantages in the aspect of numerical calculations as it avoids the difficulty of solving the Poisson equation about electrostatic potential. The significant effects of ionic interaction and the convection of pore solution on the chloride ingress are examined. Simulation results are compared with those obtained from the models using Fick's second law. The comparison shows that the present model is more detailed and accurate. It can be applied to various different cases with unified ionic diffusivities.

KW - Chloride ingress

KW - Concrete

KW - Diffusion

KW - Finite element method

KW - Mathematical model

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JO - Building and Environment

JF - Building and Environment

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ER -

Modelling of chloride ingress into concrete from a saline environment

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Keywords

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