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Characterization of microstructural and physical properties changes in biocemented sand using 3D X-ray microtomography
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Characterization of microstructural and physical properties changes in biocemented sand using 3D X-ray microtomography
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Journal Article
Characterization of microstructural and physical properties changes in biocemented sand using 3D X-ray microtomography
2017
Overview
An experimental study has been performed to investigate the effect of the biocalcification process on the microstructural and the physical properties of biocemented Fontainebleau sand samples. The microstructural properties (porosity, volume fraction of calcite, total specific surface area, specific surface area of calcite, etc.) and the physical properties (permeability, effective diffusion) of the biocemented samples were computed for the first time from 3D images with a high-resolution images obtained by X-ray synchrotron microtomography. The evolution of all these properties with respect to the volume fraction of calcite is analysed and compared with success to experimental data, when it is possible. In general, our results point out that all the properties are strongly affected by the biocalcification process. Finally, all these numerical results from 3D images and experimental data were compared to numerical values or analytical estimates computed on idealized microstructures constituted of periodic overlapping and random non-overlapping arrangements of coated spheres. These comparisons show that these simple microstructures are sufficient to capture and to predict the main evolution of both microstructural and physical properties of biocemented sands for the whole range of volume fraction of calcite investigated.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,Springer Verlag
