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Modeling of the behavior of the swelling ion exchange resins incorporated into a cement-based matrix

Author(s): M. Neji, B. Bary, N. Burlion, P. L. Bescop
Paper category: Proceedings
Book title: Proceedings of the Seventh International Conference on Concrete under Severe Conditions – Environment and Loading
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 248-260
Total Pages: 13
Language : English

Abstract: An ion exchange resin (IER) is a three dimensional cross-linked polymer with an internal solution. The aim of this kind of resin is to purge a fluid from undesirable ionic species via an ion exchange process. During this phenomenon, a swelling of the IER might occur. Our problem concerns the solidification of IER into a cement based matrix. From the inside, the resin would start an ion exchange process with the cement paste which may lead to an internal swelling. A previous paper has proposed a predictive model to determine the macroscopic mechanical behavior of a material made up of ion exchange resins solidified into a CEM III cement paste. In this study, following a brief reminder of the model, we propose to investigate the impact of the main variables controlling the macroscopic mechanical behavior of the composite. First, we focus on the effects that the chemical quantities (the ionic form of the resin, its capacity, etc…) may have on the internal pressure in comparison with experimental data. Next, the results obtained with the analytical homogenization scheme are confronted to those calculated by 3D finite element simulations.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00

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