Method for applying a mineral binder composition by 3D printing, comprising the steps of - providing a hydrous mineral binder composition, - feeding the hydrous mineral binder composition, especially by a pump, to a continuous mixer comprising • a mixing region comprising at least one dynamic mixing element and at least one inlet, • a conveying region connected to the mixing region and comprising at least one conveying device and an outlet, the hydrous mineral binder composition being conveyed through the at least one inlet into the mixing region, - feeding at least one aqueous accelerator for the setting of the hydrous mineral binder composition into the mixing region of the continuous mixer, - mixing the at least one aqueous accelerator with the hydrous binder composition in the mixing region of the continuous mixer to give an accelerated binder composition, - conveying the accelerated binder composition by the conveying device to the outlet, and - applying the accelerated binder composition layer by layer, in particular by way of a movable printing head, where the aqueous accelerator comprises at least one compound selected from the group consisting of amino alcohols, alkali metal and alkaline earth metal nitrates, alkali metal and alkaline earth metal nitrites, alkali metal and alkaline earth metal thiocyanates, alkali metal and alkaline earth metal halides, alkali metal and alkaline earth metal carbonates, glycerol, glycerol derivatives, glycols, glycol derivatives, aluminium salts, aluminium hydroxides, alkali metal and alkaline earth metal hydroxides, alkali metal and alkaline earth metal silicates, alkali metal and alkaline earth metal oxides, crystallization nuclei, especially calcium silicate hydrate compounds in finely divided form, and mixtures thereof. - providing a hydrous mineral binder composition, - feeding the hydrous mineral binder composition, especially by a pump, to a continuous mixer comprising • a mixing region comprising at least one dynamic mixing element and at least one inlet, • a conveying region connected to the mixing region and comprising at least one conveying device and an outlet, the hydrous mineral binder composition being conveyed through the at least one inlet into the mixing region, • a mixing region comprising at least one dynamic mixing element and at least one inlet, • a conveying region connected to the mixing region and comprising at least one conveying device and an outlet, - feeding at least one aqueous accelerator for the setting of the hydrous mineral binder composition into the mixing region of the continuous mixer, - mixing the at least one aqueous accelerator with the hydrous binder composition in the mixing region of the continuous mixer to give an accelerated binder composition, - conveying the accelerated binder composition by the conveying device to the outlet, and - applying the accelerated binder composition layer by layer, in particular by way of a movable printing head, where the aqueous accelerator comprises at least one compound selected from the group consisting of amino alcohols, alkali metal and alkaline earth metal nitrates, alkali metal and alkaline earth metal nitrites, alkali metal and alkaline earth metal thiocyanates, alkali metal and alkaline earth metal halides, alkali metal and alkaline earth metal carbonates, glycerol, glycerol derivatives, glycols, glycol derivatives, aluminium salts, aluminium hydroxides, alkali metal and alkaline earth metal hydroxides, alkali metal and alkaline earth metal silicates, alkali metal and alkaline earth metal oxides, crystallization nuclei, especially calcium silicate hydrate compounds in finely divided form, and mixtures thereof.