Device for processing a grout, comprising: - a first and a second support element with a respective support surface for supporting the device on an underground, the support elements are coupled to one another by means of a centerpiece and the support surfaces enclose a predetermined angle to one another with respect to a longitudinal axis of the centerpiece, the centerpiece defining a receiving area and a shaping area which are delimited by an inside area of the centerpiece, wherein the inside area has different geometries with respect to the receiving area and the shaping area, - a handling portion, which is arranged on an outside of the centerpiece for positioning and displacing the device, wherein the centerpiece comprises a penetrating receiving opening in the region of the receiving area enabling grout to be inserted into the receiving area through and to be processed in a predetermined manner with the shaping area by moving the device along the longitudinal axis, and - a receiving element, which is arranged next to the handling portion on the outside area of the centerpiece with respect to the longitudinal axis and which is designed to receive a cartridge tip and which includes the receiving opening such that the grout can be introduced through the cartridge tip and the receiving opening into the receiving area, - wherein supported on the underground, in the receiving area a first volume is formed lying between the underground and the inside area of the centerpiece and in the shaping area a second volume is formed lying between the underground and the inside area of the centerpiece, and - wherein the first volume in the receiving area is at least four times as large as the second volume in the shaping area. - a first and a second support element with a respective support surface for supporting the device on an underground, the support elements are coupled to one another by means of a centerpiece and the support surfaces enclose a predetermined angle to one another with respect to a longitudinal axis of the centerpiece, the centerpiece defining a receiving area and a shaping area which are delimited by an inside area of the centerpiece, wherein the inside area has different geometries with respect to the receiving area and the shaping area, - a handling portion, which is arranged on an outside of the centerpiece for positioning and displacing the device, wherein the centerpiece comprises a penetrating receiving opening in the region of the receiving area enabling grout to be inserted into the receiving area through and to be processed in a predetermined manner with the shaping area by moving the device along the longitudinal axis, and - a receiving element, which is arranged next to the handling portion on the outside area of the centerpiece with respect to the longitudinal axis and which is designed to receive a cartridge tip and which includes the receiving opening such that the grout can be introduced through the cartridge tip and the receiving opening into the receiving area, - wherein supported on the underground, in the receiving area a first volume is formed lying between the underground and the inside area of the centerpiece and in the shaping area a second volume is formed lying between the underground and the inside area of the centerpiece, and - wherein the first volume in the receiving area is at least four times as large as the second volume in the shaping area.