There is disclosed a mechanical coupling for two rebars. The coupling includes a first extremity disposed on a first of the two rebars, and a second extremity disposed on a second of the two rebars. Each of the first and second extremities are machined to effect an interlocking, form-fit connection between the two rebars, wherein the form-fit connection prevents separation of the extremities and inhibits axial displacement of the two rebars with respect to each other. The coupling further includes a covering disposed about the two extremities when the extremities are interconnected via the interlocking, form-fit connection. Also disclosed and described is a related method.

There is disclosed a mechanical coupling for two rebars. The coupling includes a first extremity disposed on a first of the two rebars, and a second extremity disposed on a second of the two rebars. Each of the first and second extremities are machined to effect an interlocking, form-fit connection between the two rebars, wherein the form-fit connection prevents separation of the extremities and inhibits axial displacement of the two rebars with respect to each other. The coupling further includes a covering disposed about the two extremities when the extremities are interconnected via the interlocking, form-fit connection. Also disclosed and described is a related method.

An improved shaped composite rebar is disclosed.

An improved shaped composite rebar is disclosed.

Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

Provided is a method for manufacturing segments for a tower, in particular of a wind turbine, and a prestressed segment for a tower. Provided is tower ring for a tower, a tower of the wind turbine, and a wind turbine. In addition, a prestressing device is provided. The method for manufacturing segments for a tower, in particular of a wind turbine, comprises: arranging at least one prestressing element in a mold, wherein the prestressing element comprises or consists of fiber-reinforced plastic; tensioning the prestressing element; embedding the prestressing element in a concrete mass; hardening of the concrete mass into a longitudinal segment, preferably in the form of a complete longitudinal segment of a tower; removing the hardened longitudinal segment from the mold.

Fabric reinforcement for reinforcing alkaline cementitious matrix including warp yarns and weft yarns. To increase cohesive tensile strength of intersection points of the fabric the fabric has sufficient resinous coating over a substantial portion of the warp and weft yarns, before the fabric reinforcement is embedded within, or adhesively or mechanically bonded to the cementitious matrix, wherein the coating includes organic or inorganic adhesives/polymers, or the fabric has uncoated fabric modified by adhering fabric strands together where machine direction and cross-machine strands intersect, for example with cyanoacrylate or epoxy. Bond strength of the intersecting yarns of the fabric and the corresponding mechanical bond strength of the fabric to the cementitious matrix may also be enhanced by increasing roughness and/or surface area of the yarns and resulting fabric. Methods for making fabric, cementitious boards employing the fabric, and methods for making the cementitious board are also provided.

A connection element (12) of composite material includes a bundle of fibers (14) and a binding agent. The connection element (12) further includes an insertion portion (16) having two ends (18, 20). The insertion portion (16) includes a section of the bundle of fibers embedded in the binding agent to form a monolithic structure; at at least one of the ends (18, 20) a fixing portion (22, 24) is provided. The fixing portion (22, 24) includes fibers (14) overhanging from the insertion portion (16) and partially embedded in the monolithic structure. The fibers are predisposed with anchors (26, 28) adapted to form an anchorage between the fibers (14) of the fixing portion (22, 24) and a plaster and/or a reinforcement element.

A connection element (12) of composite material includes a bundle of fibers (14) and a binding agent. The connection element (12) further includes an insertion portion (16) having two ends (18, 20). The insertion portion (16) includes a section of the bundle of fibers embedded in the binding agent to form a monolithic structure; at at least one of the ends (18, 20) a fixing portion (22, 24) is provided. The fixing portion (22, 24) includes fibers (14) overhanging from the insertion portion (16) and partially embedded in the monolithic structure. The fibers are predisposed with anchors (26, 28) adapted to form an anchorage between the fibers (14) of the fixing portion (22, 24) and a plaster and/or a reinforcement element.

A connection element (12) made of composite material includes a bundle of fibers (13) and a binding agent, and has at least one preformed portion (14) and at least one free fiber portion (16, 18, 19). The at least one preformed portion (14) includes a section of fibers (13) embedded in the binding agent to form a monolithic structure. At least part of the fibers (13) of the at least one free fiber portion (16, 18, 19) has virgin fibers (13).