Toolbox for 3D imaging and modeling of porous media: Relationship with transport properties
- Laboratoire de Physique de la Matiere condensee, Ecole Polytechnique-CNRS, 91128, Palaiseau (France)
Porous media can be considered as interfacial systems where an internal surface partitions and fills the space in a complex way. Meaningful structural features appear on a length-scale where physical chemistry plays a central role either to impose a specific organisation on the material or to strongly modify the dynamics and the thermodynamics of the embedded fluids. A key issue is to understand how the geometrical and interfacial confinement affects numerous phenomena such as molecular diffusion, excitation relaxation, reaction kinetics, phase transitions, adsorption and capillary condensation. We will first review some experimental techniques able to image the 3D structure of disordered porous media. In the second part, we will analyse the geometrical and particularly some topological properties of a disordered porous material. We will discuss the interest and the limits of several strategies for obtaining 3D representations of various pore networks starting from an incomplete set of morphological characterisations. Finally, connection between geometry and diffusive transport will be presented, with emphasis on the application of pulsed gradient spin echo NMR technique as a tool for a multiscale analysis of transport in a confining geometry.
- OSTI ID:
- 20995371
- Journal Information:
- Cement and Concrete Research, Vol. 37, Issue 3; Conference: International Conference on cementitious materials as model porous media: Nanostructure and transport processes, Centro Monte Verita (Switzerland), 17-22 Jul 2005; Other Information: DOI: 10.1016/j.cemconres.2006.08.004; PII: S0008-8846(06)00198-0; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ENVIRONMENTAL TRANSPORT
GEOMETRY
MORPHOLOGY
NUCLEAR MAGNETIC RESONANCE
PHASE TRANSFORMATIONS
PHYSICAL CHEMISTRY
POROUS MATERIALS
REACTION KINETICS
SIMULATION
SMALL ANGLE SCATTERING
SURFACES
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMICS
TOPOLOGY