Model abstraction addressing long-term simulations of chemical degradation of large-scale structures

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Abstract

This paper presents a methodology to assess the spatial-temporal evolution of chemical degradation fronts in real-size concrete structures typical of a near-surface radioactive waste disposal facility. The methodology consists of the abstraction of a so-called full (complicated) model accounting for the multicomponent-multiscale nature of concrete to an abstracted (simplified) model which simulates chemical concrete degradation based on a single component in the aqueous and solid phase. The abstracted model is verified against chemical degradation fronts simulated with the full model under both diffusive and advective transport conditions. Implementation in the multiphysics simulation tool COMSOL allows simulation of the spatial-temporal evolution of chemical degradation fronts in large-scale concrete structures.

Details

Original languageEnglish
Title of host publicationProceedings 1st International Symposium on Cement-based Materials for Nuclear Wastes. NUWCEM 2011
Place of PublicationMarcoule, France
Publication statusPublished - Oct 2011
Event1st International Symposium on Cement-based Materials for Nuclear Wastes. NUWCEM 2011 - CEA énergie atomique – énergie alternative and SFEN, Avignon, France
Duration: 11 Oct 201113 Oct 2011

Conference

Conference1st International Symposium on Cement-based Materials for Nuclear Wastes. NUWCEM 2011
CountryFrance
CityAvignon
Period2011-10-112011-10-13

Keywords

  • concrete degradation, upscaling, model abstraction

ID: 233127