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

Publication Title

Transport in Porous Media

ISSN

0169-3913

Divisions

fac_eng

Volume

84

Issue

2

Additional Information

641GF Times Cited:3 Cited References Count:32

This document is currently not available here.

Share

COinS