A concrete product comprising an adaptive prestressing system includes a concrete body and a composite wire embedded within the concrete body at a predetermined location. The composite wire comprises anchored end portions, each of which comprises a bonded wire segment constrained within the concrete body to resist axial motion, and an activable central portion between the end portions. The activable central portion comprises a shape memory alloy (SMA) wire segment and is axially movable within the concrete body. When heated at or above an austenite transformation temperature, the SMA wire segment contracts and the activable central portion exerts a tensile force on the end portions, thereby applying a compressive prestress within the concrete body at the predetermined location.

A concrete product comprising an adaptive prestressing system includes a concrete body and a composite wire embedded within the concrete body at a predetermined location. The composite wire comprises anchored end portions, each of which comprises a bonded wire segment constrained within the concrete body to resist axial motion, and an activable central portion between the end portions. The activable central portion comprises a shape memory alloy (SMA) wire segment and is axially movable within the concrete body. When heated at or above an austenite transformation temperature, the SMA wire segment contracts and the activable central portion exerts a tensile force on the end portions, thereby applying a compressive prestress within the concrete body at the predetermined location.

A textured workpiece includes a body having an outer surface with at least a first surface portion. At least one of the body and the first surface portion is non-planar. A first set of barbs extends from and is integral with the first surface portion. A first set of grooves is formed in the first surface portion. Each barb of the first set barbs is associated with a respective one of the grooves of the first set of grooves. The workpiece can be used as reinforcing bar (rebar).

A textured workpiece includes a body having an outer surface with at least a first surface portion. At least one of the body and the first surface portion is non-planar. A first set of barbs extends from and is integral with the first surface portion. A first set of grooves is formed in the first surface portion. Each barb of the first set barbs is associated with a respective one of the grooves of the first set of grooves. The workpiece can be used as reinforcing bar (rebar).

A concrete construction (100) made by 3D concrete printing that contains: two or more layers (102, 106) of cementitious material extruded one above the other, and at least one elongated steel element (104, 108) reinforcing at least one of the two or more layers. The elongated steel element (104, 108) is provided with a first crimp. Due to the crimp, a good anchorage in concrete is obtained and the anchorage force is predictable, since the standard deviation of the anchorage force is very small. The elongated steel element can be a single steel wire with a diameter D, the amplitude of the crimp ranges from 1.05×D to 5.0×D. The elongated steel element can also be a steel with steel filaments having a maximum diameter d. The amplitude of the crimp ranges from 1.05×d to 5.0×d.

A reinforcing body and a method for its manufacturing. The reinforcing body has at least one reinforcing bar. Each reinforcing bar has a core with a peripheral surface at which a rib structure with at least one rib and at least one depression is provided. The core is formed by at least one first fiber strand embedded in a core matrix. For creating the at least one rib at least one second fiber strand is embedded into a rib matrix, wherein the at least one second fiber strand and the rib matrix are separated by at least one depression in a direction parallel to a longitudinal center axis of the reinforcing bar, such that the at least one second fiber strand is separated into fiber strand sections. The at least one first and the at least one second fiber strand have fibers of different materials.

A concrete reinforcing member for admixture into a concrete composite. The concrete reinforcing member has a body extending in a longitudinal direction along an axis, the body having a lateral width. At least two anchor segments are axially spaced on the body, each anchor segment having at least one lateral extension projecting in a lateral direction along an associated plane that extends radially relative to the axis of the body. The associated plane of the lateral extension of one of the anchor segments is offset radially about the axis at an angle of greater than 0° and less than 90° relative to the associated plane of the lateral extension of the other anchor segment.

A concrete reinforcing member for admixture into a concrete composite. The concrete reinforcing member has a body extending in a longitudinal direction along an axis, the body having a lateral width. At least two anchor segments are axially spaced on the body, each anchor segment having at least one lateral extension projecting in a lateral direction along an associated plane that extends radially relative to the axis of the body. The associated plane of the lateral extension of one of the anchor segments is offset radially about the axis at an angle of greater than 0° and less than 90° relative to the associated plane of the lateral extension of the other anchor segment.

The invention is related to a masonry reinforcement and to a dispenser therefore. The masonry reinforcement comprises a reinforcement strip that defines a strip plane and that is at least in one direction bendable. In the reinforcement strip multiple strip apertures are arranged along the longitudinal direction of the strip, each strip aperture comprising an aperture rim at the aperture rim or in the range of the aperture rim of some or all of the strip apertures rim serration members are arranged. The rim serration members are orientated inwardly. They can protrude out of the strip plane of the reinforcement strip in at least one direction.

The invention is related to a masonry reinforcement and to a dispenser therefore. The masonry reinforcement comprises a reinforcement strip that defines a strip plane and that is at least in one direction bendable. In the reinforcement strip multiple strip apertures are arranged along the longitudinal direction of the strip, each strip aperture comprising an aperture rim at the aperture rim or in the range of the aperture rim of some or all of the strip apertures rim serration members are arranged. The rim serration members are orientated inwardly. They can protrude out of the strip plane of the reinforcement strip in at least one direction.