Minnebo Pieter, Thierens Glenn, De Valck Glenn, Van Tittelboom Kim, De Belie Nele, Van Hemelrijck Danny, Tsangouri Eleni
Mechanics of Materials and Construction, Vrije Universiteit Brussel, Pleinlaan 2, B-1080 Brussel, Belgium.
Faculty of Engineering and Architecture, Department of Structural Engineering, Magnel Laboratory for Concrete Research, Ghent University, Technologiepark-Zwijnaarde 904, B-9052 Ghent, Belgium.
Materials (Basel). 2017 Jan 8;10(1):49. doi: 10.3390/ma10010049.
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.
混凝土在受拉区容易形成裂缝，这就是为什么要在这些区域引入钢筋的原因。然而，仍然可能出现小裂缝，这些裂缝会使液体和气体接触到钢筋，导致钢筋腐蚀。自愈合混凝土可以修复并密封这些小（300微米）裂缝，防止腐蚀的发展。在本研究中，开发了一种输送愈合剂的血管系统。它由连接到3D打印分配部件的管道组成。这个分配部件有四个与管道相连的出口和一个从外部可进入的入口。考虑了几种用于管道的材料，即聚甲基丙烯酸甲酯、淀粉、无机磷酸盐水泥和氧化铝。三点弯曲和四点弯曲试验证明，这种开发的血管系统能够实现自愈合和多次自愈合。
