Pressure stimulated currents in rocks and their correlation with mechanical properties

The spontaneous electrification of marble samples was studied while they were subjected to uniaxial stress. The Pressure Stimulated Current (PSC) technique was applied to measure the charge released from compressed Dionysos marble samples, while they were subjected to cyclic loading. The experimental results demonstrate that, in the linear elastic region of the sample, no PSC is recorded, while beyond the stress limit (s>0.60), observable variations appear, which increase considerably in the vicinity of sample failure, reaching a maximum value just before the failure. The emitted current is reduced on each loading cycle and it has a reciprocal dependence to the normalized Young modulus. The MCD model, applied out of the vicinity of sample failure explains successfully the above findings. The existence of a "memory-like" behavior of the sample, could justify the weakness or absence of electrical earthquake precursors, during an aftershock sequence

Modeling the behavior of strengthening agents on porous geomaterials

Μη διαθέσιμη περίληψηNot available summarizationΠαρουσιάστηκε στο: 7th National Congress on Mechanics, Hellenic Society for Theoretical and Applied Mechanics, Technical University of Cret

Evaluation of the effectiveness of silicon-based strengthening agents on porous limestones

Μη διαθέσιμη περίληψηNot available summarizationΠαρουσιάστηκε στο: 10th International Congress on Deterioration and Conservation of Ston