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An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials
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An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials
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Journal Article
An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials
2021
Overview
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.
Publisher
MDPI AG
Subject
