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

Author

Listed:
  • Yasmina Shields

    (Magnel-Vandepitte Laboratory, Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 60, B-9052 Ghent, Belgium)

  • Tim Van Mullem

    (Magnel-Vandepitte Laboratory, Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 60, B-9052 Ghent, Belgium)

  • Nele De Belie

    (Magnel-Vandepitte Laboratory, Department of Structural Engineering and Building Materials, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 60, B-9052 Ghent, Belgium)

  • 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)

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.

Suggested Citation

  • Yasmina Shields & Tim Van Mullem & Nele De Belie & Kim Van Tittelboom, 2021. "An Investigation of Suitable Healing Agents for Vascular-Based Self-Healing in Cementitious Materials," Sustainability, MDPI, vol. 13(23), pages 1-21, November.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:23:p:12948-:d:685701
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