Abstract: An accelerator powder for cement and also rapid-setting binder compositions which contain the accelerator powder and the use in mortar or concrete. The accelerator powder includes from 10 to 99.7% by weight of a water-insoluble mineral powder P and from 0.3 to 90% by weight of at least one compound V selected from the group consisting of alkali metal halides and alkaline earth metal halides, alkali metal nitrates and alkaline earth metal nitrates, alkali metal nitrites and alkaline earth metal nitrites, alkali metal thiocyanates and alkaline earth metal thiocyanates and hydroxyalkylamines or salts thereof, and mixtures thereof.

Abstract: A system for applying a building material, including: a movement device for modifying a site of application in a space; a first component of the building material; a second component of the building material; and a mixer for mixing the first component and the second component, the mixer including a drive and a mixing chamber provided with a stirrer shaft and a conveyor device, the conveyor device being designed as a screw conveyor with windings, and the mixer being adapted to the building material.

Abstract: An accelerator for mineral binder compositions, especially for mortars or concrete, including: aluminium sulfate, at least one pozzolane, optionally at least one defoamer, and water. The accelerator is particularly useful for shotcrete, in the field of free-forming construction, or for additive manufacturing.

Abstract: A system for applying a building material, including: a first component of the building material, including a first constituent and a second constituent; a second component of the building material; a first mixer for mixing the first constituent and the second constituent; a supply device for supplying the first constituent to the mixer; a movement device for modifying a site of application in a space; and a second mixer for mixing the first component and the second component.

Abstract: An accelerator powder for cement and also rapid-setting binder compositions which contain the accelerator powder and the use in mortar or concrete. The accelerator powder includes from 10 to 99.7% by weight of a water-insoluble mineral powder P and from 0.3 to 90% by weight of at least one compound V selected from the group consisting of alkali metal halides and alkaline earth metal halides, alkali metal nitrates and alkaline earth metal nitrates, alkali metal nitrites and alkaline earth metal nitrites, alkali metal thiocyanates and alkaline earth metal thiocyanates and hydroxyalkylamines or salts thereof, and mixtures thereof.

Abstract: A method for the application of hydrous mineral binder compositions which contain fibres. An aqueous accelerator is mixed with the aqueous binder composition in a mixer shortly before the application. The method is very robust and makes it possible to quickly produce even large moulded bodies having a uniform surface and very good strength development properties.

Abstract: A system for applying a building material, including: a movement device for modifying a site of application in a space; a first component of the building material; a second component of the building material; a mixer for mixing the first component and the second component, the mixer including a drive module with a first coupling element and a mixing chamber module with a second coupling element, the drive module and the mixing chamber module being detachably embodied, and the drive module and the mixing chamber module being actively interconnected in an application state of the system by means of the coupling elements.

Abstract: 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.

Abstract: A two-component polyurethane compositions including (i) a polyol component A comprising a tri- or higher functional polyol P1 having an OH equivalent weight of from 60 g/mol to 250 g/mol and a di- or tri-functional polyether or polyester polyol P2 which is different from the polyol P1; and (ii) an isocyanate component B comprising at least one polyisocyanate I. Polyurethane compositions have surprisingly been found to be suitable for 3D printing processing, where they provide printed 3D objects with reduced tackiness even shortly after the printing. In addition, the invention provides processes for the production of three dimension objects form such compositions as well as three dimensional objects prepared accordingly and the use of corresponding compositions in 3D printing processes.

Abstract: An accelerator powder for cement and also rapid-setting binder compositions which contain the accelerator powder and the use in mortar or concrete. The accelerator powder includes from 10 to 99.7% by weight of a water-insoluble mineral powder P and from 0.3 to 90% by weight of at least one compound V selected from the group consisting of alkali metal halides and alkaline earth metal halides, alkali metal nitrates and alkaline earth metal nitrates, alkali metal nitrites and alkaline earth metal nitrites, alkali metal thiocyanates and alkaline earth metal thiocyanates and hydroxyalkylamines or salts thereof, and mixtures thereof.

Abstract: 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.

Abstract: A method for applying a curable building material, in particular in an additive method, including the steps of: providing at least two separate components of the building material; adding the at least two separate components into a mixing apparatus, in particular into a mixing chamber of the mixing apparatus, by a supply apparatus; mixing the at least two separate components in the mixing apparatus to obtain a curable building material in a set, cured state; supplying the set building material via a conveying line to a printing head, which is movable in at least one spatial direction, using a conveying apparatus; applying the set building material by the movable printing head.

Abstract: An additive, in particular a shrinkage reducing agent, for mineral binder compositions including at least one super absorbant polymer SAP and at least one defoamer D. Further, a mineral binder composition including the additive, processes and methods for the mixing thereof, and to hardened articles obtainable therefrom.

Abstract: 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.

Abstract: In a method for the 3D-printing of hydrous mineral binder compositions, an aqueous accelerator is mixed with the binder composition in a continuous mixer. The method is very robust and makes it possible to quickly print even large moulded bodies having a uniform aesthetic surface and very good strength development properties.

Abstract: A multi-component mortar system including a component A and a component B wherein, component A includes aluminous cement, at least one set inhibitor, at least one mineral filler and water, and component B includes an initiator system for the set-inhibited aluminous cement, at least one mineral filler and water. The multi-component mortar system is easy to use and suitable for repair and refurbishment and particularly for printing 3D structures.

Abstract: A method applying a two-component polyurethane composition by means of 3D printing, including steps providing pumpable first component A including at least one polyol having OH functionality in range from 1.5-4 and average molecular weight Mn in range from 250 to 15 000 g/mol, and at least one diol having two hydroxyl groups joined via a C2-C9 carbon chain, and at least one compound T having at least one thiol group; feeding pumpable second component B into continuous mixer's mixing region, where second component B includes at least one polyisocyanate; wherein one of components A and B additionally includes at least one metal catalyst for reaction of hydroxyl groups and isocyanate groups that is able to form thio complexes, and molar ratio of all thiol groups in at least one compound T to all metal atoms in at least one metal catalyst K is between 1:1 and 250:1.

Abstract: An improved mineral binder composition including: a mineral binder including at least 30 weight-% slag, based on the weight of the mineral binder, an activator for the hydration of the slag consisting of or comprising calcium hydroxide and a co-activator consisting of or including at least one salt selected from the group consisting of lithium carbonate, lithium sulfate and sodium carbonate.

Abstract: A system for applying a building material, including: a movement device for modifying a site of application in a space; a first component of the building material; a second component of the building material; and a mixer for mixing the first component and the second component, the mixer including a drive and a mixing chamber provided with a stirrer shaft and a conveyor device, the conveyor device being designed as a screw conveyor with windings, and the mixer being adapted to the building material.

Abstract: A system for applying a tile adhesive, including: an adhesive supplying device for supplying the tile adhesive on a surface of a tile, including a nozzle for emerging the tile adhesive and a pump unit for pumping the tile adhesive in the direction of the nozzle; and an automated supporting and moving device, in particular robot, for supporting and positioning the tile with respect to the nozzle so that the tile adhesive is distributable onto the surface of the tile when emerging from the nozzle.