An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials

被引：20
|
作者：
Shields, Yasmina [1 ]
Van Mullem, Tim [1 ]
De Belie, Nele [1 ]
Van Tittelboom, Kim [1 ]
机构：
[1] Univ Ghent, Fac Engn & Architecture, Dept Struct Engn & Bldg Mat, Magnel Vandepitte Lab, Technol Park Zwijnaarde 60, B-9052 Ghent, Belgium
来源：
SUSTAINABILITY | 2021年 / 13卷 / 23期
基金：
欧盟地平线“2020”;
关键词：
vascular networks; healing agents; self-healing concrete; durability; mechanical recovery; CRACKS; FLOW;
D O I：
10.3390/su132312948
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Self-healing cementitious materials can extend the service life of structures, improve safety during repair activities and reduce costs with minimal human intervention. Recent advances in self-healing research have shown promise for capsule-based and intrinsic healing systems. However, limited information is available regarding vascular-based self-healing mechanisms. The aim of this work is to compare different commercially available healing agents regarding their suitability in a self-healing vascular network system by examining a regain in durability and mechanical properties. The healing agents investigated include sodium silicate, two polyurethanes, two water repellent agents and an epoxy resin. Sealing efficiencies above 100% were achieved for most of the healing agents, and both polyurethanes and the epoxy resin showed high regain in strength. The results obtained from this study provide a framework for selecting a healing agent given a specific application, as a healing agent's rheology and curing properties can affect the optimal geometry and design of a vascular network.
引用
收藏
页数：21
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