Abstract: The invention relates to a geopolymer grout for protecting prestressing reinforcements, the geopolymer grout comprising metakaolin, fly ash and an activator mixture, the activator mixture comprising sodium hydroxide and sodium silicate, wherein the molar ratio Na2O:SiO2 of the sodium silicate is between 0.40 and 0.70.

Abstract: The invention relates to a method for reinforcing a civil engineering structure, comprising the following steps: —coating a surface of the structure with a first layer of resin in a fluid state, having a particle size distribution, termed first particle size distribution, —applying a layer of a dry woven fabric with a weight per unit area greater than or equal to 600 g/m2, termed high-grammage woven fabric, to the coated surface while the resin is still in the fluid state, by exerting on the woven fabric a pressure sufficient to impregnate it with resin, —coating the woven fabric with a second layer of resin, termed closure layer, in a fluid state, having a particle size distribution, termed second particle size distribution, which is less than or equal to the first particle size distribution.

Abstract: The invention relates to a method for reinforcing a civil engineering structure, comprising the following steps: —coating a surface of the structure with a first layer of resin in a fluid state, having a particle size distribution, termed first particle size distribution, —applying a layer of a dry woven fabric with a weight per unit area greater than or equal to 600 g/m2, termed high-grammage woven fabric, to the coated surface while the resin is still in the fluid state, by exerting on the woven fabric a pressure sufficient to impregnate it with resin, —coating the woven fabric with a second layer of resin, termed closure layer, in a fluid state, having a particle size distribution, termed second particle size distribution, which is less than or equal to the first particle size distribution.

Abstract: Method for producing a ballast weight for damping vibrations of a structure, the ballast weight being formed from ballast components comprising a part of a ballast cable, the method comprising: connecting the ballast cable to a conveying device, by the conveying device, moving successive portions of the ballast cable from a low point to a high point, and forming the ballast weight from a part of the successive portions of the ballast cable which have been conveyed to the high point.

Abstract: Method for producing a ballast weight for damping vibrations of a structure (2), the ballast weight (8) being formed from ballast components comprising at least part of a ballast cable (12). The method comprises: connecting the ballast cable to a conveying device (14), by means of the conveying device, moving successive portions (12P) of the ballast cable from a low point (B) to a high point (H), and forming the ballast weight (8) from at least part of the successive portions of the ballast cable which have been conveyed to the high point.

Abstract: Method of reinforcing a construction work comprising the successive steps of: applying a first layer on a surface of the construction work, the first layer comprising a curable polymer that, once it is cured, can be thermally activated for adhering to a thermoplastic material; curing said curable polymer; heating at least a surface of the first layer opposite said surface of the construction work, for thermal activation of the cured polymer; and applying a second layer over said surface of the first layer, the second layer comprising a composite including reinforcement fibers and a thermoplastic matrix, whereby the thermoplastic matrix and the thermally activated cured polymer adhere to each other.

Abstract: The invention relates to the galvanic protection of a concrete structure (10) comprising metal reinforcements (12). Holes (15) are previously made in the structure, for receiving sacrificial anodes. Before arranging said sacrificial anodes, decontamination electrodes (16) and an electrolyte are inserted into the holes in order to carry out a decontamination phase wherein the negative terminal of a power supply (18) is electrically connected to the reinforcements of the structure and the positive terminal of the power supply is electrically connected to the decontamination electrodes. Once the power supply has been activated for a certain amount of time in order to attract the chloride ions to the decontamination electrodes and the electrolyte, the electrolyte and the decontamination electrodes are removed from the holes (15) and the sacrificial anodes are sealed therein and then electrically connected to the reinforcements.

Abstract: Process for reinforcing a construction structure where, laid on one portion of said structure, is at least one portion of a reinforcement (10) of elongated shape comprising continuous fibers in the longitudinal direction of said reinforcement, which are combined with a polymer matrix, wherein said process comprises a step of removing the polymer matrix in one portion (20) of the reinforcement so as to release the fibers of the reinforcement in order to allow their rearrangement following their release from the polymer matrix. It is thus possible to optimize the binding configuration of the reinforcement with a portion of the structure to be reinforced.

Abstract: The invention therefore proposes an anchorage unit for anchoring at least one prestressing member, capable of being tensioned, onto a structural component to be strengthened or repaired by additional prestressing. The anchorage unit includes means of fixing onto the structural component and means of anchoring the prestressing member located adjacent to a first side of the anchorage unit oriented towards a regular section of the prestressing member. The fixing means are located adjacent to a second side, opposite the first side, of the anchorage unit, which is so provided that it may be put into traction when the prestressing member is tensioned.

Abstract: Method of reinforcing a construction work comprising the successive steps of: applying a first layer on a surface of the construction work, the first layer comprising a curable polymer that, once it is cured, can be thermally activated for adhering to a thermoplastic material; curing said curable polymer; heating at least a surface of the first layer opposite said surface of the construction work, for thermal activation of the cured polymer; and applying a second layer over said surface of the first layer, the second layer comprising a composite including reinforcement fibres and a thermoplastic matrix, whereby the thermoplastic matrix and the thermally activated cured polymer adhere to each other.

Abstract: A method of reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin or a resin including matrix comprising the steps of applying said band onto a contact area on an internal face of said pipe by means of a contacting member; moving said contacting member along an helical path so that said contact area follows said path; moving a main pressing member behind said contacting member along said path, to apply pressure to said band in a main pressure area separated from said contact area. Related device for reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe.

Abstract: A method for reinforcing a metal tubular structure (1) including the following steps: introducing inside the metal tubular structure (1), a plurality of substantially linear elements (4) having a tensile strength higher than a predetermined value; and injecting a curable filling product inside the metal tubular structure, so that the curable filling product contacts an inner surface of the metal tubular structure (1) and coats the substantially linear elements (4) of said plurality of elements.

Abstract: The invention therefore proposes an anchorage unit for anchoring at least one prestressing member, capable of being tensioned, onto a structural component to be strengthened or repaired by additional prestressing. The anchorage unit includes means of fixing onto the structural component and means of anchoring the prestressing member located adjacent to a first side of the anchorage unit oriented towards a regular section of the prestressing member. The fixing means are located adjacent to a second side, opposite the first side, of the anchorage unit, which is so provided that it may be put into traction when the prestressing member is tensioned.

Abstract: The invention therefore proposes an anchorage unit for anchoring at least one prestressing member, capable of being tensioned, onto a structural component to be strengthened or repaired by additional prestressing. The anchorage unit includes means of fixing onto the structural component and means of anchoring the prestressing member located adjacent to a first side of the anchorage unit oriented towards a regular section of the prestressing member. The fixing means are located adjacent to a second side, opposite the first side, of the anchorage unit, which is so provided that it may be put into traction when the prestressing member is tensioned.

Abstract: Process for the electrochemical treatment of a construction comprising a porous medium, a corrodible substance disposed in the porous medium, the construction having electrically conductive properties, comprising the application of an external electrode (3) to a surface (2) of the construction, the external electrode (3) being connected to a terminal of a generator (6), the porous medium being connected to another terminal of the generator (6), and the application of the following four phases at least once: during a first phase lasting between 12 and 360 hours, passing a negative electric current which causes anions to migrate from the porous medium to the external electrode (3) and cations to migrate from the external electrode (3) towards the porous medium, then during a second phase lasting between 2 minutes and 100 hours, interrupting the circulation of the electric current, then during a third phase lasting between 2 minutes and 24 hours, passing a positive electric current, then during a fourth phase la

Abstract: A method of reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin or a resin including matrix comprising the steps of applying said band onto a contact area on an internal face of said pipe by means of a contacting member; moving said contacting member along an helical path so that said contact area follows said path; moving a main pressing member behind said contacting member along said path, to apply pressure to said band in a main pressure area separated from said contact area. Related device for reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe.

Abstract: Process for reinforcing a construction structure where, laid on one portion of said structure, is at least one portion of a reinforcement (10) of elongated shape comprising continuous fibers in the longitudinal direction of said reinforcement, which are combined with a polymer matrix, wherein said process comprises a step of removing the polymer matrix in one portion (20) of the reinforcement so as to release the fibers of the reinforcement in order to allow their rearrangement following their release from the polymer matrix. It is thus possible to optimize the binding configuration of the reinforcement with a portion of the structure to be reinforced.

Abstract: Process for the electrochemical treatment of a construction comprising a porous medium, a corrodible substance disposed in the porous medium, the construction having electrically conductive properties, comprising the application of an external electrode (3) to a surface (2) of the construction, the external electrode (3) being connected to a terminal of a generator (6), the porous medium being connected to another terminal of the generator (6), and the application of the following four phases at least once: during a first phase lasting between 12 and 360 hours, passing a negative electric current which causes anions to migrate from the porous medium to the external electrode (3) and cations to migrate from the external electrode (3) towards the porous medium, then during a second phase lasting between 2 minutes and 100 hours, interrupting the circulation of the electric current, then during a third phase lasting between 2 minutes and 24 hours, passing a positive electric current, then during a fourth phase la

Abstract: A method of reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin or a resin including matrix comprising the steps of applying said band onto a contact area on an internal face of said pipe by means of a contacting member; moving said contacting member along an helical path so that said contact area follows said path; moving a main pressing member behind said contacting member along said path, to apply pressure to said band in a main pressure area separated from said contact area. Related device for reinforcing an embedded cylinder pipe by applying a composite structural reinforcement within the pipe.

Abstract: Method for reinforcing a structure (1), comprising the following stages: a) placing in one part (11, 12) of the structure (1) an anchoring element (3) secured to strands of reinforcing wires (41, 42) such that the anchoring element (3) is at least partially incorporated into the part (11, 12) of the structure (1) and in that at least one portion (42) of the strands of reinforcing wires protrudes from a part (12) of the structure (1); b) securing the anchoring element (3) to the part (11, 12) of the structure (1); c) applying at least one layer of fabric (5) onto a surface (15) of the structure (1) such that at least one part of the portion (42) of the protruding strands of reinforcing wires is secured to the surface (15) of the structure (1) by bonding said layer of fabric (5). Structure thus produced. Anchoring element of a structure.