Induced anisotropic gas permeability of concrete due to coupled effect of drying and temperature
| Autor: | Mohamad Ezzedine El Dandachy, Frédéric Dufour, Stefano Dal Pont, Matthieu Briffaut |
|---|---|
| Přispěvatelé: | Laboratoire sols, solides, structures - risques [Grenoble] (3SR ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Risques, Vulnérabilité des structures et comportement mécanique des matériaux (RV ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Isotropy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences 6. Clean water Permeability (earth sciences) [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Mechanics of Materials 0103 physical sciences Thermal Initial permeability Permeability measurements General Materials Science Composite material 0210 nano-technology Anisotropy Shrinkage |
| Zdroj: | Key Engineering Materials Key Engineering Materials, Trans Tech Publications, 2016, 711, pp.871-878. ⟨10.4028/www.scientific.net/KEM.711.871⟩ |
| ISSN: | 1013-9826 1662-9795 |
| DOI: | 10.4028/www.scientific.net/KEM.711.871⟩ |
| Popis: | An experimental campaign is carried out to study the effect of drying shrinkage and temperature on multi-directional gas permeability of dry concrete. Thermal loadings up to 250°C are applied on concrete samples in cylinder (11×22) and dog-bone forms (total length of 61 cm). Samples are sliced for permeability measurements. Permeabilities in longitudinal and radial directions are addressed. The cylinder samples are first sliced then dried or heated whilst the dog-bone samples are first dried or heated then sliced. The average of initial intrinsic permeability for the slices (5 cm height, 11 cm diameter) obtained from the (11×22) samples is found isotropic and equal to 2.93×10-17 m2. In this case, drying shrinkage is isotropic. Furthermore, it is shown that for the dog-bone samples, drying shrinkage may induce micro-cracks preferentially in a certain direction which induces permeability anisotropy. Finally, the evolution of the normalized intrinsic permeability with respect to initial permeability versus temperature is found isotropic. An exponential fitting of intrinsic permeability versus temperature is found based on experimental measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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