Design and testing of tubular polymeric capsules for self-healing of concrete

M. Araújo, K van Tittelboom, J. Feiteira , Elke Gruyaert, S. Chatrabhuti, J. M. Raquez, B. Savija, N. Alderete, E. Schlangen, N de Belie

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Abstract

Polymeric healing agents have proven their efficiency to heal cracks in concrete in an autonomous way. However, the bottleneck for valorisation of self-healing concrete with polymeric healing agents is their encapsulation. In the present work, the suitability of polymeric materials such as poly(methyl methacrylate) (PMMA), polystyrene (PS) and poly(lactic acid) (PLA) as carriers for healing agents in self-healing concrete has been evaluated. The durability of the polymeric capsules in different environments (demineralized water, salt water and simulated concrete pore solution) and their compatibility with various healing agents have been assessed. Next, a numerical model was used to simulate capsule rupture when intersected by a crack in concrete and validated experimentally. Finally, two real-scale self-healing concrete beams were made, containing the selected polymeric capsules (with the best properties regarding resistance to concrete mixing and breakage upon crack formation) or glass capsules and a reference beam without capsules. The self-healing efficiency was determined after crack creation by 3-point-bending tests.

Original languageEnglish
Title of host publication3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017)
Number of pages9
Volume251
DOIs
Publication statusPublished - 25 Oct 2017
Event3rd International Conference on Innovative Materials, Structures and Technologies - Riga, Latvia
Duration: 27 Sep 201729 Sep 2017
Conference number: 3

Publication series

NameIOP Conference Series: Materials Science and Engineering
Volume251
ISSN (Print)1757-8981
ISSN (Electronic)1757-899X

Conference

Conference3rd International Conference on Innovative Materials, Structures and Technologies
Abbreviated titleIMST 2017
CountryLatvia
CityRiga
Period27/09/1729/09/17

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    Araújo, M., van Tittelboom, K., Feiteira , J., Gruyaert, E., Chatrabhuti, S., Raquez, J. M., Savija, B., Alderete, N., Schlangen, E., & de Belie, N. (2017). Design and testing of tubular polymeric capsules for self-healing of concrete. In 3rd International Conference on Innovative Materials, Structures and Technologies (IMST 2017) (Vol. 251). (IOP Conference Series: Materials Science and Engineering; Vol. 251). https://doi.org/10.1088/1757-899X/251/1/012003