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Autogenous Self-Healing of Concrete: Experimental Design and Test Methods – A Review
  • Daniel Lahmann,
  • Carola Edvardsen,
  • Sylvia Kessler
Daniel Lahmann
Helmut-Schmidt-Universität Universität der Bundeswehr Hamburg

Corresponding Author:lahmannd@hsu-hh.de

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Carola Edvardsen
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Sylvia Kessler
Helmut-Schmidt-Universitat Universitat der Bundeswehr Hamburg
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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 healing 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.
28 Apr 2022Submitted to Engineering Reports
06 May 2022Submission Checks Completed
06 May 2022Assigned to Editor
08 May 2022Reviewer(s) Assigned
04 Jul 2022Editorial Decision: Revise Minor
19 Jul 20221st Revision Received
19 Jul 2022Submission Checks Completed
19 Jul 2022Assigned to Editor
20 Jul 2022Reviewer(s) Assigned
30 Jul 2022Editorial Decision: Accept