RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking
Abstractś The collapse of reinforced autoclaved aerated concrete (RAAC) panels has attracted considerable public and academic interest. As detailed experimental data are not yet available and replicating the natural corrosion process requires years or decades, computational modelling is essential to...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-025-00596-5 |
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| author | Evžen Korec Peter Grassl Milan Jirásek Hong S. Wong Emilio Martínez-Pañeda |
| author_facet | Evžen Korec Peter Grassl Milan Jirásek Hong S. Wong Emilio Martínez-Pañeda |
| author_sort | Evžen Korec |
| collection | DOAJ |
| description | Abstractś The collapse of reinforced autoclaved aerated concrete (RAAC) panels has attracted considerable public and academic interest. As detailed experimental data are not yet available and replicating the natural corrosion process requires years or decades, computational modelling is essential to understand under which conditions corrosion remains concealed. The very high porosity of RAAC is widely suspected to be a major contributing factor. However, current corrosion-induced cracking models are known to struggle with capturing the role of concrete porosity. To remedy this critical deficiency, we propose to enrich corrosion-induced cracking modelling with the analytical solution of reactive transport equations governing the precipitation of rust and a porosity-dependent description of diffusivity. With this, the corrosion concealment in RAAC panels is studied computationally for the first time, revealing that RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking and allowing to map the conditions most likely to result in sudden collapse. |
| format | Article |
| id | doaj-art-def691c1ebf347c580a5dfad3ab4b697 |
| institution | DOAJ |
| issn | 2397-2106 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj-art-def691c1ebf347c580a5dfad3ab4b6972025-08-20T03:09:20ZengNature Portfolionpj Materials Degradation2397-21062025-05-01911810.1038/s41529-025-00596-5RAAC panels can suddenly collapse before any warning of corrosion-induced surface crackingEvžen Korec0Peter Grassl1Milan Jirásek2Hong S. Wong3Emilio Martínez-Pañeda4Department of Civil and Environmental Engineering, Imperial College London, Exhibition RoadJames Watt School of Engineering, Rankine BuildingDepartment of Mechanics, Faculty of Civil Engineering, Czech Technical University in PragueDepartment of Civil and Environmental Engineering, Imperial College London, Exhibition RoadDepartment of Engineering Science, University of Oxford, Parks RoadAbstractś The collapse of reinforced autoclaved aerated concrete (RAAC) panels has attracted considerable public and academic interest. As detailed experimental data are not yet available and replicating the natural corrosion process requires years or decades, computational modelling is essential to understand under which conditions corrosion remains concealed. The very high porosity of RAAC is widely suspected to be a major contributing factor. However, current corrosion-induced cracking models are known to struggle with capturing the role of concrete porosity. To remedy this critical deficiency, we propose to enrich corrosion-induced cracking modelling with the analytical solution of reactive transport equations governing the precipitation of rust and a porosity-dependent description of diffusivity. With this, the corrosion concealment in RAAC panels is studied computationally for the first time, revealing that RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking and allowing to map the conditions most likely to result in sudden collapse.https://doi.org/10.1038/s41529-025-00596-5 |
| spellingShingle | Evžen Korec Peter Grassl Milan Jirásek Hong S. Wong Emilio Martínez-Pañeda RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking npj Materials Degradation |
| title | RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking |
| title_full | RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking |
| title_fullStr | RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking |
| title_full_unstemmed | RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking |
| title_short | RAAC panels can suddenly collapse before any warning of corrosion-induced surface cracking |
| title_sort | raac panels can suddenly collapse before any warning of corrosion induced surface cracking |
| url | https://doi.org/10.1038/s41529-025-00596-5 |
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