| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Socié, Adrien
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024Reactive Transport Modelling of the Aggregate Degradation During ASR
- 2023Mineralogical Evolution and Expansion of Cement Pastes in a Sulfate-Confined Environmentcitations
- 2023A fully coupled Hydraulic Mechanical Chemical approach applied to cementitious material damage due to carbonationcitations
- 2023Simulation of internal and external sulfate attacks of concrete with a generic reactive transport-poromechanical modelcitations
- 2022Mineralogical Evolution and Expansion of Cement Pastes in a Sulfate-Confined Environmentcitations
- 2019Chemo-mechanical modelling of swelling concrete
- 2019Chemo-poro-mechanical modeling of cementitious materials (diffusion-precipitation-cracking)
- 2019Chemo-mechanical modelling of swelling in a fractured porous medium
Places of action
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conferencepaper
Chemo-mechanical modelling of swelling in a fractured porous medium
Abstract
International audience ; In the context of the lifetime extension of nuclear power plants, the french Institut de Radioprotectionet de Sûreté Nuclaire (IRSN) conducts researches to predict the ageing of cementitious materials. Thepresent work is focusing on the impact of the chemical degradations such as Delayed Ettringite Formation(DEF) on the overall material properties at the aggregates scale. DEF is an endogenous pathologyrelated to the cement composition and to the early age chemical reactions where thermal conditionsinduced dissolution of primal ettringite and later moisture environment can lead to ettringite reprecipitation.The crystallization pressure in the porous cement paste thus conducts both to its swelling andsome cracking by differential strains. These cracks are preferential location for ions diffusion and furtherettringite reprecipitations. These strongly coupled phenomena suggest a non-linear chemo-mechanicalmodelling where the diffusion, precipitation, pressurization and crack process should be solved in acoupled approach. In an modelling, for each time step, one calculates:Species diffusion: to describe the environmental impact on the concrete. Diffusion is modeled by Fick’slaw in a porous medium. This model follows the framework of [1] and it takes into account the resistiveimpact of the crack on the normal flow;Chemical reactions: knowing species concentrations in solution, one models different types of reactionssuch as aqueous, solid and sorption reactions [2]. Thus, the amount of ettringite volume is evaluated;Mechanical: knowing the solid volume, a local pressure is calculated in the poro-mechanical model andin the cracks. The crack initiation, propagation and pressurization are based on a dedicated CohesiveZone Model [3].The presented applications will focus on the impact of material properties, such as volume fraction ofinclusion and matrix composition, on strain kinetics.REFERENCES[1] L. Bichet. Taking into account the transport mechanisms in the fracture of heterogeneous ...