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Materials 2017, 10(1), 49; doi:10.3390/ma10010049

A Novel Design of Autonomously Healed Concrete: Towards a Vascular Healing Network

1
Mechanics of Materials and Construction, Vrije Universiteit Brussel, Pleinlaan 2, B-1080 Brussel, Belgium
2
Faculty of Engineering and Architecture, Department of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent University, Technologiepark-Zwijnaarde 904, B-9052 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 15 November 2016 / Revised: 16 December 2016 / Accepted: 26 December 2016 / Published: 8 January 2017
(This article belongs to the Special Issue Self-Healing Concrete)

Abstract

Concrete is prone to crack formation in the tensile zone, which is why steel reinforcement is introduced in these zones. However, small cracks could still arise, which give liquids and gasses access to the reinforcement causing it to corrode. Self-healing concrete repairs and seals these small (300 µm) cracks, preventing the development of corrosion. In this study, a vascular system, carrying the healing agent, is developed. It consists of tubes connected to a 3D printed distribution piece. This distribution piece has four outlets that are connected to the tubes and has one inlet, which is accessible from outside. Several materials were considered for the tubes, i.e., polymethylmethacrylate, starch, inorganic phosphate cement and alumina. Three-point-bending and four-point-bending tests proved that self-healing and multiple self-healing is possible with this developed vascular system. View Full-Text
Keywords: self-healing concrete; vascular system; multiple healing self-healing concrete; vascular system; multiple healing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Minnebo, P.; Thierens, G.; De Valck, G.; Van Tittelboom, K.; De Belie, N.; Van Hemelrijck, D.; Tsangouri, E. A Novel Design of Autonomously Healed Concrete: Towards a Vascular Healing Network. Materials 2017, 10, 49.

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