X-ray tomographic method for measuring three-dimensional deformation and water content distribution in swelling clays

摘要: Abstract A non-invasive method for simultaneous measurement of the 3D displacement field and water content distribution a wetted solid material is developed. The based on comparison X-ray tomographic images sample in reference state deformed state. deformation analyses were successfully compared with numerical results cylindrical rubber test under axial compression, gravimetric from axially sliced bentonite samples, respectively. methods applied 4D study (three spatial dimensions time) wetting purified swelling doped glass tracer particles, synthetic groundwater. obtained samples are repeatable appear qualitatively correct plausible. They useful e.g. validating models involving transport resulting bentonite. potentially applicable also other processes liquid such as wetting/swelling drying/shrinking heterogeneous materials. prerequisite applicability that contains sufficient amount local inhomogeneities visible identifiable successive to facilitate analysis, change affects total density enough be observable images.