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Materials 2013, 6(6), 2182-2217;

Self-Healing in Cementitious Materials—A Review

Magnel Laboratory for Concrete Research, Department of Structural Engineering, Faculty of Engineering, Ghent University, Technologiepark Zwijnaarde 904, Ghent B-9052, Belgium
Author to whom correspondence should be addressed.
Received: 18 February 2013 / Revised: 19 April 2013 / Accepted: 25 April 2013 / Published: 27 May 2013
(This article belongs to the Special Issue Self-healing Concrete)
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Concrete is very sensitive to crack formation. As wide cracks endanger the durability, repair may be required. However, these repair works raise the life-cycle cost of concrete as they are labor intensive and because the structure becomes in disuse during repair. In 1994, C. Dry was the first who proposed the intentional introduction of self-healing properties in concrete. In the following years, several researchers started to investigate this topic. The goal of this review is to provide an in-depth comparison of the different self-healing approaches which are available today. Among these approaches, some are aimed at improving the natural mechanism of autogenous crack healing, while others are aimed at modifying concrete by embedding capsules with suitable healing agents so that cracks heal in a completely autonomous way after they appear. In this review, special attention is paid to the types of healing agents and capsules used. In addition, the various methodologies have been evaluated based on the trigger mechanism used and attention has been paid to the properties regained due to self-healing. View Full-Text
Keywords: mortar; further hydration; encapsulation; polymers; bacteria; sustainability mortar; further hydration; encapsulation; polymers; bacteria; sustainability

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Van Tittelboom, K.; De Belie, N. Self-Healing in Cementitious Materials—A Review. Materials 2013, 6, 2182-2217.

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