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 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.
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Karim, M.R., Krabbenhoft, K. Extraction of Effective Cement Paste Diffusivities from X-ray Microtomography Scans. Transp Porous Med 84, 371–388 (2010). https://doi.org/10.1007/s11242-009-9506-y
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DOI: https://doi.org/10.1007/s11242-009-9506-y