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Coupled influence of chloride and carbonation on the service life of unsaturated concrete

Author(s): Achour Mohamad, Amiri Ouali, Bignonnet François, Rozière Emmanuel
Paper category: Proceedings
Book title: Proceedings of the 2nd International RILEM/COST Conference on Early Age Cracking and Serviceability in Cement-based Materials and Structures Volume 2
Editor(s): Stéphanie Staquet and Dimitrios Aggelis
ISBN: 978-2-35158-200-8
e-ISBN: 978-2-35158-198-8
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 889-894
Total Pages: 6
Language : English

Abstract: Based on the concrete composition and porosity as well as the physicochemical equilibria, a macroscopic model is proposed to study the influence of carbonation on the transport of chloride ions into unsaturated concrete. The model features the transport of ions by diffusion, convection, chemical activity of ions, interactions between chloride ions and concrete and ion-ion interactions in the solution. Applications of the numerical model are demonstrated by predicting the service-life of a porous concrete specimen exposed to an aggressive environment containing chloride, carbon dioxide and moisture. A comparison of the model with a set of experimental data is finally proposed.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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