Evaluating changes of transport properties of chemically degrading concrete using a coupled reactive transport model

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Abstract

This paper presents a model to simulate chemical degradation of concrete due to leaching. The model considers simultaneously the multi-scale nature of concrete, a thermodynamic description of cement phases, and time-variable transport properties. It is implemented in the generic simulator HP1, which simulates the reactive transport in variably-saturated porous media. To illustrate the capabilities of the program, we simulate diffusive transport through concrete in contact with waters of different solution compositions (i.e., concentrations of major cations and anions and inorganic carbon contents) and use a homogenization scheme for upscaling tortuosity. The simulations show the coupled effects between geochemical state variables, transport properties, and durability criteria for cementitious materials used in near-surface radioactive waste disposal facilities

Details

Original languageEnglish
Title of host publicationProceedings 1st International Symposium on Cement-based Materials for Nuclear Wasters. NUWCEM 2011
Place of PublicationMarcoule, France
Pages1-12
Publication statusPublished - Oct 2011
Event1st International Symposium on Cement-based Materials for Nuclear Wasters. 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 Wasters. NUWCEM 2011
CountryFrance
CityAvignon
Period2011-10-112011-10-13

Keywords

  • concrete degradation, HP1, reactive transport, cement chemistry

ID: 254141