Capsules with evolving brittleness to resist the preparation of self-healing concrete

Authors

  • E. Gruyaert Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University
  • K. Van Tittelboom Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University
  • J. Sucaet Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University
  • J. Anrijs Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University
  • S. Van Vlierberghe Polymer Chemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University
  • P. Dubruel Polymer Chemistry and Biomaterials Group, Department of Organic and Macromolecular Chemistry, Faculty of Sciences, Ghent University
  • B. G. De Geest Department of Pharmaceutics, Ghent University
  • J. P. Remon Department of Pharmaceutics, Ghent University
  • N. De Belie Magnel Laboratory for Concrete Research, Department of Structural Engineerin, Faculty of Engineering and Architecture, Ghent University

DOI:

https://doi.org/10.3989/mc.2016.07115

Keywords:

Concrete, Mortar, Polymer, Durability, Mechanical properties

Abstract


Capsules for self-healing concrete have to possess multifunctional properties and it would be an enormous advantage in the valorization process when they could also be mixed in. Therefore, we aimed to develop capsules with evolving brittleness. Capsules with high initial flexibility were prepared by adding a plasticizer to an ethyl cellulose matrix. During hardening of the concrete, the plasticizing agent should leach out to the moist environment yielding more brittle capsules which break upon crack appearance. The tested capsules could easily be mixed in during concrete production. However, incompatibility issues between the capsule wall and the inner polymeric healing agent appeared. Moreover, the capsules became insufficiently brittle and the bond strength to the cementitious matrix was too weak. Consequently, multilayer capsules were tested. These capsules had a high impact resistance to endure concrete mixing and were able to break upon crack formation.

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Published

2016-09-30

How to Cite

Gruyaert, E., Van Tittelboom, K., Sucaet, J., Anrijs, J., Van Vlierberghe, S., Dubruel, P., De Geest, B. G., Remon, J. P., & De Belie, N. (2016). Capsules with evolving brittleness to resist the preparation of self-healing concrete. Materiales De Construcción, 66(323), e092. https://doi.org/10.3989/mc.2016.07115

Issue

Section

Research Articles