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Sustainability
Volume 13
Issue 23
10.3390/su132312948
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Article

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

by
Yasmina Shields
*,
Tim Van Mullem
,
Nele De Belie
and
Kim Van Tittelboom
Magnel-Vandepitte Laboratory, Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 60, B-9052 Ghent, Belgium
*
Author to whom correspondence should be addressed.
Sustainability 2021, 13(23), 12948; https://doi.org/10.3390/su132312948
Submission received: 26 October 2021 / Revised: 19 November 2021 / Accepted: 21 November 2021 / Published: 23 November 2021
(This article belongs to the Special Issue Sustainability and Green Construction)
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Abstract

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.
Keywords: vascular networks; healing agents; self-healing concrete; durability; mechanical recovery vascular networks; healing agents; self-healing concrete; durability; mechanical recovery

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MDPI and ACS Style

Shields, Y.; Van Mullem, T.; De Belie, N.; Van Tittelboom, K. An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials. Sustainability 2021, 13, 12948. https://doi.org/10.3390/su132312948

AMA Style

Shields Y, Van Mullem T, De Belie N, Van Tittelboom K. An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials. Sustainability. 2021; 13(23):12948. https://doi.org/10.3390/su132312948

Chicago/Turabian Style

Shields, Yasmina, Tim Van Mullem, Nele De Belie, and Kim Van Tittelboom. 2021. "An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials" Sustainability 13, no. 23: 12948. https://doi.org/10.3390/su132312948

APA Style

Shields, Y., Van Mullem, T., De Belie, N., & Van Tittelboom, K. (2021). An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials. Sustainability, 13(23), 12948. https://doi.org/10.3390/su132312948

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