Tong, Liang‐yu;
Liu, Qing‐feng;
Xiong, Qingxiang;
Meng, Zhaozheng;
Amiri, Ouali;
Zhang, Mingzhong;
(2024)
Modeling the chloride transport in concrete from
microstructure generation to chloride diffusivity prediction.
Computer-Aided Civil and Infrastructure Engineering
10.1111/mice.13331.
(In press).
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Abstract
Pore structure characteristics of cementitious materials play a critical role in the transport properties of concrete structures. This paper develops a novel framework for modeling chloride penetration in concrete, considering the pore structure-dependent model parameters. In the framework, a multi-scale transport model was derived by linking the chloride diffusivities with pore size distributions (PSDs). Based on the three-dimensional (3D) microstructure generated by “porous growth” and “hard core-soft shell” methods, two sub-models were computationally developed for determining the multi-modal PSDs and pore size-related chloride diffusivities. The predicted results by these series of models were compared with corresponding experimental data. The results indicated that by adopting pore size-related diffusivities, even if the total porosities were the same, the proposed multi-scale chloride transport model could better capture the effect of different PSDs on chloride penetration profiles, while the model without pore structure-depended parameters would ignore the differences. Compared with the reference transport models, which adopt averaged chloride diffusivities, the chloride penetration depths predicted by the proposed multi-scale model are in better agreement with experimental data, with 10%–25% reduced prediction error. This multi-scale transport model is hoped to provide a novel computational approach on 3D microstructure generation and better reveal the underlying mechanism of the chloride penetration process in concrete from a microscopic perspective.
| Type: | Article |
|---|---|
| Title: | Modeling the chloride transport in concrete from microstructure generation to chloride diffusivity prediction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/mice.13331 |
| Publisher version: | http://dx.doi.org/10.1111/mice.13331 |
| Language: | English |
| Additional information: | Copyright © 2024 The Author(s). Computer-Aided Civil and Infrastructure Engineering published by Wiley Periodicals LLC on behalf of Editor. This is an open access article under the terms of the Creative Commons Attribution License, https://creativecommons.org/licenses/by/4.0/, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10196505 |
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