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

Conference paper (2017)

Authors

M. Araújo Universiteit Gent
K van Tittelboom Universiteit Gent
J. Feiteira Universiteit Gent
Elke Gruyaert Universiteit Gent
S. Chatrabhuti Université de Mons
J. M. Raquez Université de Mons
B. Šavija Materials and Environment - CEG
N. Alderete Universiteit Gent, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
E. Schlangen Materials and Environment - CEG
N de Belie Universiteit Gent
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2017 M. Araújo, K van Tittelboom, J. Feiteira, Elke Gruyaert, S. Chatrabhuti, J. M. Raquez, B. Šavija, N. Alderete, E. Schlangen, N de Belie
DOI: https://doi.org/10.1088/1757-899X/251/1/012003
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Published Date

25-10-2017

Language

English

Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

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.