A method to strengthen or repair concrete and other structures comprises securing a plate having a shape memory alloy (SMA) wire embedded therein to a localized region of a structure. The SMA wire has a deformed shape configured for self-anchorage within the plate. The SMA wire is heated at or above an austenite transformation temperature, and the SMA wire resists shape recovery and remains self-anchored within the plate. Accordingly, a compressive force is generated within the SMA wire and transferred to the plate. At an interface between the plate and the localized region of the structure, the compressive force is transmitted from the plate to the structure, thereby providing localized prestressing of the structure.

The disclosure relates to a printer device as well as a method for building a printer guide structure of a passenger transport system configured as an escalator or moving walkway in an existing building. The printer device comprises at least one printer guide device, a 3D concrete printer device, which is arranged such that it can be moved along the printer guide device, and a printer controller.

The disclosure relates to a printer device for creating a concrete support structure of a passenger transport system configured as an escalator or moving walkway in an existing building. The printer device has at least one printer guide device, a 3D concrete printer device, which is arranged so as to be movable along the printer guide device, and a printer controller. The printer guiding device comprises at least one guideway whose guide path can be adjusted at least in the vertical direction in relation to its spatial position of use.

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 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 present invention discloses an arched steel fiber for reinforcement of a cement-based material, of which a main body is arched in a length direction and opposite ends of the main body are curved such that the steel fiber has a higher pullout resistance strength compared to a conventional steel fiber, thereby improving mechanical performance such as a tensile strength, a flexural strength, an energy absorption capability, and the like of a cement compound. In addition, compared to a conventional art, a mixing amount of steel fiber to performance can be reduced so that an added economic value in terms of consumable cost can be created

Improved structural column assemblies and related fabrication methods are provided. More particularly, the present disclosure provides improved systems/methods for the design and fabrication of structural column assemblies having improved mechanical properties and/or improved resistance to multiple hazards (e.g., earthquakes, blasts, high temperatures, etc.). Disclosed herein is a structural column assembly having a uniquely designed fiber reinforced polymer (FRP) tube filled with concrete to be used as a structural column (e.g., in bridge and/or building construction). The exemplary composite or FRP tube can include layers of metallic and/or non-metallic fibers wound at improved/optimized angles. A multi-hazard resilient column system which can negate the need for additional concrete reinforcement or formwork at construction sites is provided. The novel tube is highly resistant to corrosive environments, and will facilitate accelerated bridge construction (ABC), while providing a solution for columns at risk from multiple hazards.

The invention relates to a masonry reinforcement structure (100) comprising at least two assemblies (102) of grouped metal filaments, at least one positioning element (104) for positioning the assemblies (102) of grouped metal filaments in a predetermined position and a polymer coating (110) for securing the assemblies (102) of grouped metal filaments in this predetermined position. The invention also relates to a method of manufacturing such masonry reinforcement structure (100) and to a roll comprising such a masonry reinforcement structure(100). The invention further relates to masonry reinforced with such masonry reinforcement structure (100) and to a method to apply such masonry reinforcement structure(100).

The invention relates to a structure for the reinforcement of pavements. The structure is provided at predetermined positions with interruptions or with weakened zones. The invention further relates to a method of manufacturing such a structure and to a method of breaking up a pavement reinforced with such a structure.

The method according to the invention for producing a prestressed concrete workpiece is characterized in that the prestress is created by a heat treatment, wherein the concrete and the reinforcement therefor are selected in such a way that, when cooling the concrete workpiece from an elevated temperature, the heat expansion coefficient of the concrete is less than that of the reinforcement, and in that, during cooling, the concrete and the reinforcement adhere sufficiently strongly to one another if, during cooling, the concrete is hydrated at least to such an extent in order to be able to expand the reinforcement on account of the different heat expansion coefficients, and in that the concrete, together with the reinforcement, is brought to the elevated temperature in such a way that and is hydrated during cooling at least to such an extent that it is prestressed by the reinforcement after cooling.