A mixed finite element discretization scheme for a concrete carbonation model with concentration-dependent porosity

• Autores: Florin A. Radu, Adrian Muntean , Iuliu Sorin Pop, Nicolae Suciu, O. Kolditz
• Localización: Journal of computational and applied mathematics, ISSN 0377-0427, Vol. 246, Nº 1, 2013, págs. 74-85
• Idioma: inglés
• DOI: 10.1016/j.cam.2012.10.017
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• Resumen

  • We investigate a prototypical reaction�diffusion-flow problem in saturated/unsaturated porous media. The special features of our problem are twofold: the reaction produces water and therefore the flow and transport are coupled in both directions and moreover, the reaction may alter the microstructure. This means we have a variable porosity in our model.

    For the spatial discretization we propose a mass conservative scheme based on the mixed finite element method (MFEM). The scheme is semi-implicit in time. Error estimates are obtained for some particular cases. We apply our finite element methodology for the case of concrete carbonation�one of the most important physico-chemical processes affecting the durability of concrete.