A method for producing a shaped body from a curable material, in particular from a mineral binder composition, wherein the curable material is applied layer by layer in an additive method, in particular in an additive free-space method, by a printing head that can be moved in at least one spatial direction and wherein an application rate of the curable material and the temporal development of strength of the curable material are coordinated with each other.

Systems and methods of shotcrete construction are contemplated whereby guide rails are placed in proximity and forward to a shotcrete receiving surface, with any guide rails disposed directly in front of the shotcrete receiving surface being configured to be offset from the receiving surface allowing shotcrete to be sprayed behind the offset guide rails. Following application of shotcrete, a screed configured to engage with and traverse along at least two of the guide rails may be used to rod the shotcrete via a protruding region of the screed extending beyond the guide rails, thereby removing excess shotcrete and imparting to the shotcrete surface a contour at least partially defined by the configuration of the guide rails and the configuration of the protruding region of the screed. Complex, precise, and even exotic architectural shotcrete installations may be created in this fashion by providing a suitable set of guide rails and screed.

An example device for building stationary structures on a work surface includes a scaffold, which is arranged around the work surface. In the example, a working head is provided, which, with the help of multiple control cables is held on the scaffold and arranged above the work surface, upper control cables are provided, which run above the working head from the scaffold, lower control cables are provided, which run below the working head from the scaffold, all control cables can be extended out of the scaffold and retracted to the scaffold, in order to change a position of the working head, and a control unit is provided, which is connected with actuators for the extending and retracting of the control cables, and is configured to actuate these actuators to change the position of the working head.

Systems and methods of shotcrete construction are contemplated whereby guide rails are placed in proximity and forward to a shotcrete receiving surface, with any guide rails disposed directly in front of the shotcrete receiving surface being configured to be offset from the receiving surface allowing shotcrete to be sprayed behind the offset guide rails. Following application of shotcrete, a screed configured to engage with and traverse along at least two of the guide rails may be used to rod the shotcrete via a protruding region of the screed extending beyond the guide rails, thereby removing excess shotcrete and imparting to the shotcrete surface a contour at least partially defined by the configuration of the guide rails and the configuration of the protruding region of the screed. Complex, precise, and even exotic architectural shotcrete installations may be created in this fashion by providing a suitable set of guide rails and screed.

An assembly for forming a mechanical interface for fastening tubular components includes a tubular pipe having at least one end with an external surface provided with groove structure. A tubular attachment is provided with a first engagement structure configured to be aligned with the groove structure on the tubular pipe. The tubular attachment is axially force fit on the outer end of the tubular pipe, and radially fastened thereto in response to at least one tool applied to the external surface of the tubular attachment. Also disclosed is a method for forming the mechanical interface between the tubular pipe and the tubular attachment.

An articulated boom includes a plurality of boom segments connected together via articulated joints. At least one of the boom segments includes a welded structure providing a box profile in which an upper flange and a lower flange are connected together by lateral web plates. At least one of the web plates, the upper flange, and the lower flange includes at least one reinforcing distortion.

The object of the invention are the device and method for the creating of supports, formworks, and structures made of foamed plastics, and the method for the creating of constructions, which can be used especially for the incremental creation of concrete structures, as well as the device and method for the creating of concrete constructions, especially in the incremental technique, where the supports, formworks, and structures are made of foamed plastics using the incremental technique.

A system for applying a building material including: a mixing device for mixing individual components of the building material into a curable building material; a pressure head which can be moved in at least one spatial direction and by means of which the workable building material can be applied; a delivery line, with which the curable building material can be conveyed from the mixing device to the pressure head; at least one delivery device for delivering the curable building material from the mixing device through the delivery line to the pressure head; a feed device, which is designed in such a manner that at least two separate components of the building material can be fed via at least two separate inlets into the mixing device, more particularly into a mixing chamber of the mixing device.

An Advanced Additive Construction device to extrude layers of cementitious material consistently and accurately with an anti-clogging method is disclosed. The device introduces low continuous frequency sonic vibrations with frequency range of 20- to 10000 Hz to slow cement or binding agents from curing the mixture inside the extruder and to get rid of air bubbles trapped in the mixture. Buildup of early cured mixtures inside the extruder tract especially in large volume or long period prints result in accumulation of material inside the extruder tract which causes extruder clogging. A shaker plate coupled with four miniature shakers excite the material mixture inside the extruder orthogonal to the inner casing direction. Furthermore, four more miniature shakers equipped with extension rods excite the material mixture inside the extruder orthogonal to the top mount, thereby preventing any cementitious material sticking within the extruder casing and around the central flight auger. Moreover, increasing the print speed and flow rate of the extruder by 60% which results in cutting the print time to more than 70% when counting the elimination of clogging. Also, it allows the extruder to accommodate a wider range of cementitious mixtures without the need to adjust admixtures and setting times especially for mixtures that have a rapid setting rate. The shaker's vibrating system, FIG. 7, functions within the upper chamber of the extruder casing, the upper chamber has the largest diameter as it operates as a flow control reservoir, which has less pressure compared to the lower chamber of the extruder. The vibrating rods and inner wall system prevent cementitious material from sticking to the extruder inner walls and allows smooth continuous flow of material.

A repair method for a civil engineering work. The method includes the depositing, directly onto a portion of the work to be repaired, of a reinforcing structure formed from one or more successive layers of at least one reinforcing material which are each extruded in contact with the surface onto which the material is to be deposited, using a robot system, with the material being extruded in strips.