| 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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Zhao, Shanyu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (26/26 displayed)
- 2024The poor reliability of thermal conductivity data in the aerogel literature: a call to action!citations
- 2024Effect of polymer concentration and cross-linking density on the microstructure and properties of polyimide aerogelscitations
- 2024Effect of polymer concentration and cross-linking density on the microstructure and properties of polyimide aerogelscitations
- 2024Study of Electrical and Dielectric Behaviors of Copper-Doped Zinc Oxide Ceramic Prepared by Spark Plasma Sintering for Electronic Device Applicationscitations
- 2024Study of electrical and dielectric behaviors of copper-doped zinc oxide ceramic prepared by Spark Plasma Sintering for electronic device applicationscitations
- 20233D Printed Polyimide Nanocomposite Aerogels for Electromagnetic Interference Shielding and Thermal Managementcitations
- 2023Recipes and designs for aerogelscitations
- 20233D printed polyimide nanocomposite aerogels for electromagnetic interference shielding and thermal managementcitations
- 2023Sodium silicate-based aerogels by ambient pressure dryingcitations
- 2023FireDrone: multi-environment thermally agnostic aerial robotcitations
- 2022Multiple assembly strategies for silica aerogel-fiber combinations – a reviewcitations
- 2022Heterogeneous silica-polyimide aerogel-in-aerogel nanocompositescitations
- 2020Merging flexibility with superinsulation : machinable, nanofibrous pullulan-silica aerogel composites
- 2020Solvents, CO 2 and biopolymers: structure formation in chitosan aerogelcitations
- 2019Study of physical properties and microstructure of aerogel-cement mortars for improving the fire safety of high-performance concrete linings in tunnelscitations
- 2018High efficiency thermoacoustic loudspeaker made with a silica aerogel substratecitations
- 2018Silica aerogel–epoxy nanocomposites: understanding epoxy reinforcement in terms of aerogel surface chemistry and epoxy–silica interface compatibilitycitations
- 2018Merging flexibility with superinsulation: machinable, nanofibrous pullulan-silica aerogel compositescitations
- 2016Structure of cellulose -silica hybrid aerogel at sub-micron scale, studied by synchrotron X-ray tomographic microscopycitations
- 2016Thermal assessment of ambient pressure dried silica aerogel composite boards at laboratory and field scalecitations
- 2016Facile one-pot synthesis of mechanically robust biopolymer–silica nanocomposite aerogel by cogelation of silicic acid with chitosan in aqueous mediacitations
- 2015Multiscale assembly of superinsulating silica aerogels within silylated nanocellulosic scaffolds: improved mechanical properties promoted by nanoscale chemical compatibilizationcitations
- 2015Strong, thermally superinsulating biopolymer–silica aerogel hybrids by cogelation of silicic acid with pectincitations
- 2015Multiscale Assembly of Superinsulating Silica Aerogels Within Silylated Nanocellulosic Scaffolds: Improved Mechanical Properties Promoted by Nanoscale Chemical Compatibilizationcitations
- 2015Dimensional and structural control of silica aerogel membranes for miniaturized motionless gas pumpscitations
- 2015Interpenetrating pectin-silica aerogel nanocomposite materials with improved thermo-mechanical properties
Places of action
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article
Study of physical properties and microstructure of aerogel-cement mortars for improving the fire safety of high-performance concrete linings in tunnels
Abstract
n high-performance concrete (HPC) subjected to high temperature during tunnel fires, the build-up of vapor pressure due to dehydration of the cement hydration products cannot be relieved due to the very low porosity and permeability of this type of concrete, often resulting in explosive spalling. Explosive spalling may cause devastating damage of the tunnel structure, which threatens both, civilians and emergency response units. This work suggests a potential application of silica aerogel in the protection of concrete linings, which consists in decorating the surface of HPC structures with a highly-insulating aerogel-cement mortar layer, with the aim of delaying the heating of the HPC and extending the performance of the main concrete structure of the tunnel under fire. The main aim of this study is investigating the impact of the microstructure, with special focus on the pore structure, on the thermal conductivity and the mechanical properties of the aerogel mortars. In particular, the integrity of the aerogels in the mortars, both in the mixing process and the possible long-term chemical degradation, was a main concern. Finally, a preliminary test of the performance against fire spalling was performed. While aerogel-containing mortars were able to protect HPC cubes from fire spalling under a specific thermal loading protocol, the thermal conductivity and the mechanical properties obtained were similar to those of cellular concrete in the same range of total porosity. A possible explanation of the lower-than-expected insulation performance is the partial degradation of the aerogel filler by reaction with the alkaline pore solution of the mortars. Implications of these new findings on aerogel-cement mixtures are also discussed.