Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes
The modelling of chloride transport in concrete under an electrical field requires taking into account the electrode processes. These processes are very rarely introduced into the literature, despite their impact on chloride migration and the electroneutrality of the pore solution of the material. T...
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MDPI AG
2023-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/18/6200 |
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| author | Zine-Eddine Kribes Rachid Cherif Abdelkarim Aït-Mokhtar |
| author_facet | Zine-Eddine Kribes Rachid Cherif Abdelkarim Aït-Mokhtar |
| author_sort | Zine-Eddine Kribes |
| collection | DOAJ |
| description | The modelling of chloride transport in concrete under an electrical field requires taking into account the electrode processes. These processes are very rarely introduced into the literature, despite their impact on chloride migration and the electroneutrality of the pore solution of the material. This paper aims to propose a multi-ion model for chloride migration that takes into consideration the electrode processes. The model is applied to simulate the standard chloride migration test. The generation of OH<sup>−</sup> in the cathode and H<sup>+</sup> in the anode allows for the monitoring of the electroneutrality. The model considers all of the ions in the pore solution. Ion fluxes are calculated using the Nernst–Planck equation. The Langmuir model is used to simulate the chloride isotherms. The thermodynamic equilibrium in the material is considered, which reflects the ion–solid interactions during the migration. Measurements of water porosity and the chemical composition of the pore solution are essential to provide input data and the initial and boundary conditions. The numerical results of the ion profiles in the material studied confirm the electroneutrality at any point within the material, in contrast with models that do not take the electrode processes into account. The proposed model allows for the more accurate simulation of the chloride migration test and electrochemical chloride extraction in reinforced concrete structures subjected to NaCl as part of maintenance and repair strategies. |
| first_indexed | 2024-03-10T22:30:39Z |
| format | Article |
| id | doaj.art-12ecce404e60472d82fdb2af7e8825cf |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T22:30:39Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-12ecce404e60472d82fdb2af7e8825cf2023-11-19T11:44:16ZengMDPI AGMaterials1996-19442023-09-011618620010.3390/ma16186200Modelling of Chloride Transport in the Standard Migration Test including Electrode ProcessesZine-Eddine Kribes0Rachid Cherif1Abdelkarim Aït-Mokhtar2LaSIE UMR CNRS 7356, La Rochelle University, 17000 La Rochelle, FranceLaSIE UMR CNRS 7356, La Rochelle University, 17000 La Rochelle, FranceLaSIE UMR CNRS 7356, La Rochelle University, 17000 La Rochelle, FranceThe modelling of chloride transport in concrete under an electrical field requires taking into account the electrode processes. These processes are very rarely introduced into the literature, despite their impact on chloride migration and the electroneutrality of the pore solution of the material. This paper aims to propose a multi-ion model for chloride migration that takes into consideration the electrode processes. The model is applied to simulate the standard chloride migration test. The generation of OH<sup>−</sup> in the cathode and H<sup>+</sup> in the anode allows for the monitoring of the electroneutrality. The model considers all of the ions in the pore solution. Ion fluxes are calculated using the Nernst–Planck equation. The Langmuir model is used to simulate the chloride isotherms. The thermodynamic equilibrium in the material is considered, which reflects the ion–solid interactions during the migration. Measurements of water porosity and the chemical composition of the pore solution are essential to provide input data and the initial and boundary conditions. The numerical results of the ion profiles in the material studied confirm the electroneutrality at any point within the material, in contrast with models that do not take the electrode processes into account. The proposed model allows for the more accurate simulation of the chloride migration test and electrochemical chloride extraction in reinforced concrete structures subjected to NaCl as part of maintenance and repair strategies.https://www.mdpi.com/1996-1944/16/18/6200chloride migrationthermodynamic equilibriummulti-ion interactionselectrode processes |
| spellingShingle | Zine-Eddine Kribes Rachid Cherif Abdelkarim Aït-Mokhtar Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes Materials chloride migration thermodynamic equilibrium multi-ion interactions electrode processes |
| title | Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes |
| title_full | Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes |
| title_fullStr | Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes |
| title_full_unstemmed | Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes |
| title_short | Modelling of Chloride Transport in the Standard Migration Test including Electrode Processes |
| title_sort | modelling of chloride transport in the standard migration test including electrode processes |
| topic | chloride migration thermodynamic equilibrium multi-ion interactions electrode processes |
| url | https://www.mdpi.com/1996-1944/16/18/6200 |
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