Statistical homogenization of elastic properties of cement paste based on X-ray microtomography images

► Produce elastic properties of cement paste based on X-ray microtomography images. ► Only phase properties and X-ray microtomography images are needed. ► Avoids any subjective decision and differs from previous work. ► Based on recent research on cement paste microstructure. This paper proposes a s...

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Bibliographic Details
Published in:International journal of solids and structures 2013-03, Vol.50 (5), p.699-709
Main Authors: Huang, J., Krabbenhoft, K., Lyamin, A.V.
Format: Article
Language:English
Subjects:
Cement paste
Cements
Elastic constants
Elastic modulus
Finite element method
Homogenizing
Mathematical analysis
Mathematical models
Micromechanics
Nanostructure
Pastes
Statistical homogenization
X-ray microtomography
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Summary:► Produce elastic properties of cement paste based on X-ray microtomography images. ► Only phase properties and X-ray microtomography images are needed. ► Avoids any subjective decision and differs from previous work. ► Based on recent research on cement paste microstructure. This paper proposes a statistical multiscale homogenization method to extract effective elastic properties of cement paste on the basis of X-ray microtomography images. The procedure starts at the nanolevel of the C-S-H matrix. Because the highest resolution of current X-ray microtomography is at micrometer scale, C-S-H and CH remains unsegmented. The unresolved hydrated cement is homogenized by a two-step analytical method based on Mori–Tanaka (M–T) scheme. A statistical numerical homogenization method based on the Finite Element Method (FEM) was used to homogenize the elastic properties of cement pastes. Mean elastic properties showed good agreement with experimental results. The proposed multiscale method combines advanced analytical, numerical and experimental methods in a systematical way so that the inputs are phase material properties and X-ray microtomography images only. The novelty of this method is in the avoidance of any subjective decision.
ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2012.10.030