| 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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Jebli, Mouad
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Experimental evaluation of interface adhesion of a flax fiber composite patch with epoxy and polyurethane adhesives for the reinforcement of steel structurescitations
- 2024Experimental evaluation of interface adhesion of a flax fiber composite patch with epoxy and polyurethane adhesives for the reinforcement of steel structurescitations
- 2023Identification of a cohesive zone model for cement paste-aggregate interface in a shear testcitations
- 2023Experimental evaluation of interface adhesion of a flax fiber composite patch with epoxy and polyurethane adhesives for the reinforcement of steel structurescitations
- 2021Characterization of the expansion due to the delayed ettringite formation at the cement paste-aggregate interfacecitations
- 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
- 2020Experimental study of the chemo-mechanical properties of the interfacial transition zone of concrete
- 2020Leaching effect on concrete - Part I: characterization of chemical degradation evolution of ITZ ; Efectul levigării asupra betonului -partea I: caracterizarea evoluției degradării chimice a zonei de tranziție inter facială
- 2020Leaching effect on concrete – Part II: mechanical behaviour evolution of ITZ during leaching at the local scale
- 2020Leaching effect on concrete – Part II: mechanical behaviour evolution of ITZ during leaching at the local scale ; Efectul levigării asupra betonului – partea a ii-a: evoluția comportării mecanice a itz în timpul levigării la scară locală
- 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
- 2019Identification of a cohesive zone model for cement paste-aggregate interface in a shear testcitations
- 2018Leaching effect on mechanical properties of cement-aggregate interfacecitations
- 2018Leaching effect on mechanical properties of cement-aggregate interfacecitations
- 2018Experimental characterization of mechanical properties of the cement-aggregate interface in concretecitations
- 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
- 2016Characterization of behavior and cracking of a cement paste confined between spherical aggregate particlescitations
- 2016Characterization at the local scale of mechanical properties of the cement paste-aggregate interface : leaching application
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article
Experimental characterization of mechanical properties of the cement-aggregate interface in concrete
Abstract
The microstructure of the Interfacial Transition Zone (ITZ) between the aggregates and the cement paste is characterized by a higher porosity than that of the bulk paste. The particular properties of this zone strongly influence the mechanical behavior of concrete. Microscopic cracks, which develop during subsequent loading, appear either in the matrix (cement paste or mortar) or along the cement-aggregates interface. Cracks could be caused by either tensile, shear strengths or by combinations of both. In this work, the mechanical properties of the cement paste – aggregate sample are experimentally studied. The experimental tests are performed on parallelepipedic samples at classical aggregate scale (one centimeter sections). These samples are composed of limestone aggregates and Portland cement paste, hereafter named “composite”. The cement paste is prepared with a water/cement ratio of 0.5. The shape of the prepared composites makes them convenient for direct tensile and shear tests. At different stages of hydration, we performed direct tensile and shear tests on the composites by means of specific devices. The same tests were carried out on the cement paste in order to compare with the composite results. The analysis of the experimental results showed that the tensile strength of the cement-aggregate interface was about 30% lower than that of the cement paste tensile strength. Also, the shear strength of the cement-aggregate interface was smaller than the shear strength of the cement paste. In the same way as macroscopic Mohr–Coulomb criterion, we observed an increase of shear strength when normal stress increased. It provides access to a local cohesion (c) and a local friction angle at classical aggregate scale.