Advances in X-ray Tomography for Geomaterials by Jacques Desrues, Gioacchino Viggiani, Pierre Bésuelle

By Jacques Desrues, Gioacchino Viggiani, Pierre Bésuelle

This booklet brings jointly a complete of forty eight contributions (including five keynote papers) that have been awarded on the 2d overseas Workshop at the program of X-ray CT for Geomaterials (GeoX 2006) held in Aussois, France, on 4-7 October, 2006.

The contributions hide a variety of themes, from basic characterization of fabric habit to functions in geotechnical and geoenvironmental engineering. contemporary advances of X-ray expertise, and software program also are mentioned. As such, it will be beneficial analyzing for a person drawn to the appliance of X-ray CT to geomaterials from either primary and utilized perspectives.Content:

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This paper has mainly focused on the ductile behavior at higher confining stress, where a single band of localized deformation was observed and there was little to very little volumetric strain in such a band. At lower confining stresses, failure was 50 Advances in X-ray Tomography for Geomaterials associated to the appearance of several open cracks, both parallel to the direction of loading (axial splitting) and inclined. In this case, the application of digital image correlation is more difficult because the specimen splits into several pieces.

1] in accordance with the results of the constant rate of consolidation test. It was also calculated considering that the cross-sectional area of air foam was excluded when calculating the effective crosssectional area for water flow. Here, we define this permeability as “true” permeability. Figure 10 shows that the relationship between the coefficient of true permeability and the effective void ratio of SGM and CTC estimated by the triaxial apparatus test are in good agreement. This result indicates that this kind of correction can represent the permeability of SGM from the macro viewpoint.

Caractérisation expérimentale du comportement hydromécanique des argilites Meuse/Haute Marne, PhD thesis, Institut National Polytechnique de Lorraine, 2002. , “Under stress permeability determination of the Meuse/Haute-Marne mudstone”, Engineering Geology, vol. 81, no. 3, p. 329-340, 2005. , “Creep and time-dependent damage in argillaceous rocks”, International Journal of Rock Mechanics and Mining Sciences, vol. 43, no. 6, p. 950-960, 2006. , “Tomographic 3D-DSP: measurement of internal deformations”, Proc.

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