| 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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Kessal, Oussama
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2023Effect of self-curing admixture and nature of the sand on the mechanical and microstructural properties of concrete in hot climate conditioncitations
- 2023Modelling of fresh properties and strength activity index with microstructure characterisation of ternary cement incorporating waste glass and granulated blast furnace slag
- 2022Experimental Evaluation of Workability Compressive Strength and Freeze-Thaw Durability of Concrete Containing Expanded Clay Aggregatescitations
- 2022Aggregate Type Influence on Microstructural Behavior of Concrete Exposed to Elevated Temperature
- 2022Aggregate Type Influence on Microstructural Behavior of Concrete Exposed to Elevated Temperature
- 2016EFFECT OF THE QUENCHING IN WATER OF THE CEMENTITIOUS MATERIALS SUBJECTED TO FIRE
- 2015Effect of The Quenching in Water of the Cementitious Materials Subjected to Fire ; Effet de la ré-humidification sur les matériaux cimentaires soumis à un incendie
- 2015Effect of The Quenching in Water of the Cementitious Materials Subjected to Fire
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article
Effect of The Quenching in Water of the Cementitious Materials Subjected to Fire ; Effet de la ré-humidification sur les matériaux cimentaires soumis à un incendie
Abstract
International audience ; Many studies have permitted the analysis of the mechanical behavior of concrete subjected to high temperatures. However, no one has done any work on the effect of re-humidification of cementitious materials exposed to a real fire. This is the first study. To better simulate the effects of a real fire, a test with wood fire is developed. Different cementitious materials (hardened cement pastes, and mortar) are subject to this heating for 1hour. The results of tests indicate that:- The average resistance loss is in the order of 60% after exhibition in fire.- The re-humidification (sudden quenching in water) allowed a recovery of mass about 10% and consequently a gain ofcompressive strength about 40%.- Internal micro-structure analysis of cement pastes studied by XRD and the observation by a scanning electronmicroscope (SEM) shows that after the re-humidification, the cement rehydrates again (formation of Portlandite andCSH). Those observations explain the increase mechanical strength. ; De nombreux travaux ont permis d'analyser le comportement mécanique d'un béton soumis aux hautes températures. Toutefois aucune étude n'a été faite sur l'effet de la ré-humidification des matériaux cimentaires exposés à un incendie réel. Cette étude en constitue une première. Afin de mieux simuler les effets d'un incendie réel, un test au feu de bois est mis au point. Les différents matériaux cimentaires (pâtes de ciment durci et mortier) sont soumis à cet échauffement pendant 1h. Les résultats d'essais effectués montrent : - La perte moyenne de résistance est de l'ordre de 60 % après l'exposition au feu. - La ré-humidification (refroidissement brusque dans l'eau) permet une récupération de masse de l'ordre de 10% et par conséquent un gain de résistance mécanique en compression d'environ 40%. - L'analyse de la microstructure interne des pâtes de ciment étudiée par diffraction X et observations au MEB montrent qu'après ré-humidification, le ciment se réhydrate à nouveau (formation de la portlandite et CSH). ...