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A Review of Self-Healing Concrete for Damage Management of Structures

De Belie, N and Gruyaert, E and Al-Tabbaa, A and Antonaci, P and Baera, C and Bajare, D and Darquennes, A and Davies, R and Ferrara, L and Jefferson, T and Litina, C and Miljevic, B and Otlewska, A and Ranogajec, J and Roig-Flores, M and Paine, K and Lukowski, P and Serna, P and Tulliani, JM and Vucetic, S and Wang, J and Jonkers, HM (2018) A Review of Self-Healing Concrete for Damage Management of Structures. Advanced Materials Interfaces, 5.

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© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim The increasing concern for safety and sustainability of structures is calling for the development of smart self-healing materials and preventive repair methods. The appearance of small cracks (<300 µm in width) in concrete is almost unavoidable, not necessarily causing a risk of collapse for the structure, but surely impairing its functionality, accelerating its degradation, and diminishing its service life and sustainability. This review provides the state-of-the-art of recent developments of self-healing concrete, covering autogenous or intrinsic healing of traditional concrete followed by stimulated autogenous healing via use of mineral additives, crystalline admixtures or (superabsorbent) polymers, and subsequently autonomous self-healing mechanisms, i.e. via, application of micro-, macro-, or vascular encapsulated polymers, minerals, or bacteria. The (stimulated) autogenous mechanisms are generally limited to healing crack widths of about 100–150 µm. In contrast, most autonomous self-healing mechanisms can heal cracks of 300 µm, even sometimes up to more than 1 mm, and usually act faster. After explaining the basic concept for each self-healing technique, the most recent advances are collected, explaining the progress and current limitations, to provide insights toward the future developments. This review addresses the research needs required to remove hindrances that limit market penetration of self-healing concrete technologies.

Item Type: Article
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 07 Jun 2018 01:29
Last Modified: 22 Apr 2021 05:41
DOI: 10.1002/admi.201800074