Mixer, system for applying a building material and method for producing a structure from building material

A method for producing a structure from a construction material using a moving device having a mixer arranged thereon, the moving device configured to move the mixer of the moving device, the mixer comprising a drum having at least one inlet and at least one outlet, a drive, a stirring shaft for mixing, the stirring shaft being arranged in the drum and coupled to the drive, and a conveying device arranged in the drum, the conveying device being configured as a screw extruder in which turns of the screw extruder become tighter toward one end of the conveying device, the method comprising the steps of:

• feeding a first component that is a pumpable building material to the at least one inlet of the drum;
• feeding a second component that includes at least one of an accelerating admixture and a hardening accelerator to the at least one inlet of the drum;
• mixing the first component and the second component with the stirring shaft to produce the construction material, the mixer being operated at a speed of more than 1000 revolutions per minute during the mixing;
• conveying the construction material toward and through the at least one outlet of the drum with the conveying device, and
• moving the mixer with the moving device to apply the construction material and construct a structure from the construction material.