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

被引：88
作者：
Minnebo, Pieter [1 ]
Thierens, Glenn [1 ]
De Valck, Glenn [1 ]
Van Tittelboom, Kim [2 ]
De Belie, Nele [2 ]
Van Hemelrijck, Danny [1 ]
Tsangouri, Eleni [1 ]
机构：
[1] Vrije Univ Brussel, Mech Mat & Construct, Pl Laan 2, B-1080 Brussels, Belgium
[2] Univ Ghent, Dept Struct Engn, Magnel Lab Concrete Res, Fac Engn & Architecture, Technol Pk Zwijnaarde 904, B-9052 Ghent, Belgium
来源：
MATERIALS | 2017年 / 10卷 / 01期
关键词：
self-healing concrete; vascular system; multiple healing; CEMENTITIOUS MATERIALS;
D O I：
10.3390/ma10010049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 mu m) 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.
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页数：23
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