A dry mineral binder composition includes cement and mineral fillers for the manufacture of molded parts by way of 3D printing. The binder composition additionally contains at least one aluminum sulfate-based accelerator, at least one polycarboxylate ether-based super-plasticizer and at least one rheology additive.

The present invention is a mixing and feeding system for 3D printing of buildings, designed for extruding highly viscous construction material with a high setting speed. The invention ensures consistent quality of material mixture and does not depend on external and unpredictable factors. The system utilizes a piston water dispenser, a single horizontal brushless motor, water metering nozzles, a pneumatic clutch, separation of wet and dry areas, an optional high pressure washer, and an automatic release of flushing balls for additional and autonomous cleaning. Any extruder should be installed as close as possible to the dispenser supply line of the present invention, such that the system sensors may detect the proper dose of mixed material.

Disclosed is an apparatus and method for manufacturing high-performance concrete by introducing air into normal concrete and dissipating air, wherein high-performance concrete is formed in a manner in which bubbles, which are to be removed, are added in a large amount together with an admixture to pre-blended normal concrete so that the admixture is uniformly dispersed in the normal concrete using the ball-bearing effect of the bubbles, thus forming mixed concrete, and the mixed concrete is discharged using air at a high pressure of 5 atom or more to thereby shoot high-performance concrete of which the slump, remarkably increased due to the large amount of bubbles, is reduced to fall within the range of slump of normal concrete while dissipating excess air from the mixed concrete.

A method of curing concrete beginning with the acquisition of seedless hydro mulch material and incorporating the material into a material spraying device, mixing the material with water in the spraying device and spraying the material and water onto the surface of curing concrete. The spraying device includes a spray nozzle and pressurized air is introduced into the spray nozzle prior to the spraying of the material and water onto the curing concrete. The pressurized air may be provided to the spray nozzle at an air pressure of equal to or greater than 35 psi and less than or equal to 75 psi.

A device for applying clay to a surface, in particular for producing models, including a housing with a connection piece for a clay supply hose and with a clay dispensing opening. A disk, which is rotatably seated in a clay dispensing flange opening in a clay-tight manner and is driven by a motor, has the dispensing opening and otherwise closes off the flange opening, and has an elevated portion on its exterior.

The invention relates to a dry mineral binder composition comprising cement and mineral fillers for the manufacture of molded parts by way of 3D printing. The binder composition additionally contains at least one aluminum sulfate-based accelerator, at least one polycarboxylate ether-based super-plasticizer and at least one rheology additive.

A method for producing a three-dimensional object from a curable binder composition with an additive manufacturing process, the method including the steps of: producing the curable binder composition in the setting state, preferably by mixing the constituents of the curable binder composition in a mixing unit, conveying the curable binder composition in the setting state via a supply line to a printing head movable in at least one spatial direction, applying the curable binder composition in the setting state by means of the printing head, wherein the curable binder composition is preferably applied layer-by-layer, to form the three-dimensional object, determining a pressure drop over a length section of the supply line with at least two pressure measuring device(s), optionally, determining a flow rate of the curable binder composition in the supply line, optionally determining a temperature of the curable binder composition in the supply line.