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

Karim, M.R. and Krabbenhoft, K. (2010) Extraction of effective cement paste diffusivities from X-ray microtomography scans. Transport in Porous Media, 84 (2). pp. 371-388. ISSN 0169-3913

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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.

Item Type: Article
Additional Information: 641GF Times Cited:3 Cited References Count:32
Uncontrolled Keywords: Homogenization, Microtomography, xmt, cement paste, diffusion, finite elements, Representative volume element, 2-dimensional composites, transport-properties, migration test, Size, Concrete
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 04 Apr 2014 01:31
Last Modified: 04 Apr 2014 01:31
URI: http://eprints.um.edu.my/id/eprint/8781

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