| 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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Youssoufi, Moulay Saïd El
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2021Characterization of the expansion due to the delayed ettringite formation at the cement paste-aggregate interfacecitations
- 2020Identification of a cohesive zone model for cement paste-aggregate interface in a shear testcitations
- 2020Leaching effect on concrete – Part II: mechanical behaviour evolution of ITZ during leaching at the local scale
- 2020Caractérisation à l’échelle locale de la dégradation de l’interphase ciment-granulat par un traitement hygrothermique
- 2020Leaching effect on concrete -part I: characterization of chemical degradation evolution of ITZ
- 2018Leaching effect on mechanical properties of cement-aggregate interfacecitations
- 2018Experimental characterization of mechanical properties of the cement-aggregate interface in concretecitations
- 2018Caractérisation de l'expansion due à la réaction sulfatique interne à l'échelle de l'interphase pâte de ciment-granulat
- 2018Caractérisation expérimentale des propriétés chimio-mécaniques de l'interphase pâte de ciment-granulat par MEB et nano-indentation
- 2016Characterization of behavior and cracking of a cement paste confined between spherical aggregate particlescitations
- 2007Shear strength of unsaturated soils: experiments, DEM simulations, and micromechanical analysis
Places of action
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article
Leaching effect on concrete -part I: characterization of chemical degradation evolution of ITZ
Abstract
The study of the durability of concrete subjected to leaching requires knowledge of the mechanisms of chemical degradation of cement paste and of cement paste/aggregate bond. The Interfacial Transition Zone (ITZ), the portion of cement paste in contact with aggregates, is a vulnerable zone in the context of chemical degradation due to its high degree of solubility and diffusivity. In order to evaluate the leaching kinetics as well as the chemical dissolution of bulk cement paste and of the ITZ, parallelepiped cement paste samples and cement paste/aggregate composites were produced and submitted to accelerated leaching. The measurement of the degraded depth was carried out by image analysis of the cross sections of the cement paste and of the interface. The degradation kinetics of the bulk cement paste is proportional to the square root of time. On the other hand, that of the ITZ initially follows the same trend, but slightly accelerates after a critical threshold. Chemical analyses were performed by Energy Dispersive Spectroscopy (EDS) to measure the Ca/Si molar ratios of ITZ and cement paste for a single degradation time. The greater drop of the Ca/Si ratio at the ITZ reveals a significantly greater dissolution of the portlandite than in the bulk cement paste.