Abstract: An electrochemical measurement system for monitoring a concrete structure having a reinforcement bar, including: at least six electrodes to contact the concrete structure's surface, including at least two emitting electrodes to inject electrical signals into the structure and at least four receiving electrodes combined in pairs, each pair receiving electrical signals, originating from an explored zone of the structure located beneath an axis connecting the electrode pairs with its depth depending on the distance between the two electrodes in the pair; an acquisition module to (i) control the electrodes and (ii) acquire and store in a memory the electrical signals; a processing module to calculate, for the electrical signals, induced polarization potential response value(s) and one apparent resistivity value; from these values, process output characteristic(s) of each explored zone; an image reconstruction module to generate an image of the distribution of the output characteristic(s) in the explored zones.

Abstract: The invention relates to a geothermal exchanger comprising a casing containing a heat-transfer fluid with which it is in direct contact. The casing is flexible such as to be in direct contact with a wall of the borehole containing the exchanger under the effect of the pressure of the heat-transfer fluid.

Abstract: The invention relates to a geothermal exchanger comprising a casing containing a heat-transfer fluid with which it is in direct contact. The casing is flexible such as to be in direct contact with a wall of the borehole containing the exchanger under the effect of the pressure of the heat-transfer fluid.

Abstract: A method for the lagoon-based bioleaching of a metallic ore, wherein the temperature of the suspension containing the metallic ore to be bioleached, a bioleaching consortium and a nutritive substrate of the microorganisms of the consortium is controlled by regulating the flows and the composition of a gas containing oxygen and optionally also CO2 injected into the suspension, the temperature of the suspension being controlled such that it can be maintained within a pre-determined range suitable for bioleaching.