- Title
- Extraction of effective cement paste diffusivities from X-ray microtomography scans
- Creator
- Karim, M. R.; Krabbenhoft, K.
- Relation
- Transport in Porous Media Vol. 84, Issue 2, p. 371-388
- Publisher Link
- http://dx.doi.org/10.1007/s11242-009-9506-y
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2010
- Description
- The problem of extracting effective diffusivities of cement pastes on the basis of X-ray microtomography images is considered. A general computational homogenization framework is developed and applied to a variety of cement pastes whose microstructure has been digitized to a resolution of 1 μm. At this resolution, important submicron features are not resolved. Consequently, we propose a methodology whereby the pore space is ascribed a diffusivity less than the free diffusivity. For this purpose, a simple rule that incorporates microtomography data is proposed and shown to yield satisfactory results.
- Subject
- homogenization; microtomography; XMT; cement paste; diffusion; finite elements
- Identifier
- http://hdl.handle.net/1959.13/922329
- Identifier
- uon:9542
- Identifier
- ISSN:0169-3913
- Language
- eng
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