Abstract: The present invention relates to a method for injecting a liquid in a porous material or a material including discontinuity interfaces, wherein said method includes the steps of: attaching an injection part to said material, the injection part defining a compression chamber with at least one surface of said material; injecting said liquid into said compression chamber under a low pressure; and applying a high-power acoustic wave to said liquid using a drawing element, wherein said drawing element extends into said compression chamber.

Abstract: The present invention relates to a method for injecting a liquid in a porous material or a material including discontinuity interfaces, wherein said method includes the steps of: attaching an injection part to said material, the injection part defining a compression chamber with at least one surface of said material; injecting said liquid into said compression chamber under a low pressure; and applying a high-power acoustic wave to said liquid using a drawing element, wherein said drawing element extends into said compression chamber.

Abstract: The invention provides a process for the protection of active reinforcements embedded in a concrete mass against the effects of oxidation, said reinforcements being possibly in the form of a bunch of cables or strands arranged in a sheath, providing also the possibility to detect imperfections of the injection grout such as voids or porosity, wherein at least one channel is first drilled in the concrete mass opening in front of the reinforcements which have to be protected, whereafter a corrosion inhibiting solution is injected into the said channel while applying a high power pulsating wave to the said solution to make it penetrate and each channel is occluded.

Abstract: An ultrasonic device comprises at least one transducer and a probe having a first active part adapted to be immersed in a medium, an adapter part for matching the impedance of the probe to the medium and an end surface on the adapter part adapted to emit ultrasonic waves longitudinally into the medium. The first active part lies between the end surface on the adapter part, at which is located a peak of the longitudinal ultrasonic waves, and a limiting part at which is located a node of the longitudinal ultrasonic waves. It comprises a second active part adapted to emit ultrasonic waves radially into the medium and at which is located one or more peaks of the radial ultrasonic waves.