Extraction of effective cement paste diffusivities from X-ray microtomography scans

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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