Extraction of effective cement paste diffusivities from X-ray microtomography scans
Document Type
Article
Publication Date
1-1-2010
Abstract
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 mu m. 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.
Keywords
Homogenization, Microtomography, xmt, cement paste, diffusion, finite elements, Representative volume element, 2-dimensional composites, transport-properties, migration test, Size, Concrete
Divisions
fac_eng
Publication Title
Transport in Porous Media
Volume
84
Issue
2
Additional Information
641GF Times Cited:3 Cited References Count:32