Autogenous self‐healing of concrete: Experimental design and test methodsA review
Abstract Cracks in concrete structures can serve as pathways for aggressive chemical substances that can lead to a progressive deterioration of the cement stone as well as of the reinforcement, affecting the load capacity, service life and useability of concrete structures. However, concrete and rei...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Engineering Reports |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/eng2.12565 |
| _version_ | 1797965514121674752 |
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| author | Daniel Lahmann Carola Edvardsen Sylvia Kessler |
| author_facet | Daniel Lahmann Carola Edvardsen Sylvia Kessler |
| author_sort | Daniel Lahmann |
| collection | DOAJ |
| description | Abstract Cracks in concrete structures can serve as pathways for aggressive chemical substances that can lead to a progressive deterioration of the cement stone as well as of the reinforcement, affecting the load capacity, service life and useability of concrete structures. However, concrete and reinforced concrete exhibit an intrinsic ability to heal cracks, defined as autogenous self‐healing. This effect includes the precipitation of calcium carbonate in the presence of water and CO2 and is accompanied by continued hydration, swelling, and mechanical blocking of the crack pathway. Experiments led to the inclusion of crack sealing by autogenous self‐healing in Eurocode 1992–3 for water retaining concrete structures. However, despite code restrictions, autogenous self‐healing of concrete shows limited effectiveness in practice. This indicates the need for further research to provide engineers with reliable design rules. Therefore, this study aims for giving a broad literature review on the state‐of‐the‐art knowledge on autogenous self‐healing, the boundary conditions, consensus, and controversy of processes and factors influencing the efficiency of autogenous self‐healing. Regarding the transferability of laboratory results to real concrete constructions, materials, crack initiation techniques, experimental concepts, and methods for assessing the effectiveness of autogenous self‐healing are discussed and recommendations for future experiments are set. |
| first_indexed | 2024-04-11T02:00:05Z |
| format | Article |
| id | doaj.art-d7823522647944e3baf501503f47addd |
| institution | Directory Open Access Journal |
| issn | 2577-8196 |
| language | English |
| last_indexed | 2024-04-11T02:00:05Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Engineering Reports |
| spelling | doaj.art-d7823522647944e3baf501503f47addd2023-01-03T04:21:38ZengWileyEngineering Reports2577-81962023-01-0151n/an/a10.1002/eng2.12565Autogenous self‐healing of concrete: Experimental design and test methodsA reviewDaniel Lahmann0Carola Edvardsen1Sylvia Kessler2Institute of Engineering Materials and Building Preservation Helmut‐Schmidt‐University/University of the Federal Armed Forces Hamburg Hamburg GermanyCOWI Technical Director/Lead Durability Specialist Tunnels and Underground Infrastructure Kongens Lyngby DenmarkInstitute of Engineering Materials and Building Preservation Helmut‐Schmidt‐University/University of the Federal Armed Forces Hamburg Hamburg GermanyAbstract Cracks in concrete structures can serve as pathways for aggressive chemical substances that can lead to a progressive deterioration of the cement stone as well as of the reinforcement, affecting the load capacity, service life and useability of concrete structures. However, concrete and reinforced concrete exhibit an intrinsic ability to heal cracks, defined as autogenous self‐healing. This effect includes the precipitation of calcium carbonate in the presence of water and CO2 and is accompanied by continued hydration, swelling, and mechanical blocking of the crack pathway. Experiments led to the inclusion of crack sealing by autogenous self‐healing in Eurocode 1992–3 for water retaining concrete structures. However, despite code restrictions, autogenous self‐healing of concrete shows limited effectiveness in practice. This indicates the need for further research to provide engineers with reliable design rules. Therefore, this study aims for giving a broad literature review on the state‐of‐the‐art knowledge on autogenous self‐healing, the boundary conditions, consensus, and controversy of processes and factors influencing the efficiency of autogenous self‐healing. Regarding the transferability of laboratory results to real concrete constructions, materials, crack initiation techniques, experimental concepts, and methods for assessing the effectiveness of autogenous self‐healing are discussed and recommendations for future experiments are set.https://doi.org/10.1002/eng2.12565autogenous self‐healingconcreteexperimental designsinfluencing factors |
| spellingShingle | Daniel Lahmann Carola Edvardsen Sylvia Kessler Autogenous self‐healing of concrete: Experimental design and test methodsA review Engineering Reports autogenous self‐healing concrete experimental designs influencing factors |
| title | Autogenous self‐healing of concrete: Experimental design and test methodsA review |
| title_full | Autogenous self‐healing of concrete: Experimental design and test methodsA review |
| title_fullStr | Autogenous self‐healing of concrete: Experimental design and test methodsA review |
| title_full_unstemmed | Autogenous self‐healing of concrete: Experimental design and test methodsA review |
| title_short | Autogenous self‐healing of concrete: Experimental design and test methodsA review |
| title_sort | autogenous self healing of concrete experimental design and test methodsa review |
| topic | autogenous self‐healing concrete experimental designs influencing factors |
| url | https://doi.org/10.1002/eng2.12565 |
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