Method for manufacturing a precast concrete component

Abstract

Method for producing concrete paving stones (2) with at least one predetermined surface structure, in which a core concrete (4) is poured into and compacted into at least one mold (3) having a plurality of recesses for the simultaneous production of several concrete paving stones (2), thereby first creating a core concrete layer, in which a facing concrete (12) is then poured onto the compacted core concrete (4) in the multiple recesses to create a facing concrete layer (12), and subsequently the poured concrete (4; 12) is hardened, in which, prior to the hardening of the concrete (4; 12), the surface of the produced facing concrete layer (12) is treated with at least one treatment device (17), thereby creating the predetermined surface structure in the form of depressions in the facing concrete layer (12).wherein the treatment device (17) is moved by means of a traversing and / or adjusting device (15) to one and / or more surface positions of the facing concrete layer (12) and / or along at least one surface section and / or surface area of ​​the facing concrete layer (12) to generate at least one predetermined surface structure of the facing concrete layer (12) in a program-controlled manner, wherein the surface of the facing concrete layer is treated with one or more treatment elements (22, 22.1, 22.2) of the treatment device (17) and the treatment element (22, 22.1, 22.2) of the treatment device (17) is selected in a program-controlled manner and wherein the depth of the depressions to be produced in the facing concrete layer is determined in a program-controlled manner.

Description

Technical field

[0001] The invention relates to a method for producing concrete elements, in particular concrete blocks and / or concrete slabs with at least one predetermined surface structure. In the method, core concrete is poured and compacted into at least one mold for one or more blocks and / or slabs, then a facing concrete layer is poured and compacted, and subsequently the concrete is cured. At least before the concrete cures, the facing concrete layer is treated with at least one treatment device.

[0002] Such concrete elements can be designed, for example, as precast concrete blocks according to DIN V 18500, concrete garden design elements according to DIN EN 13198, concrete paving stones or slabs according to DIN EN 1338, or concrete kerbstones according to DIN EN 1340. State of the art

[0003] Methods for producing colour-patterned, shaped articles or molded bodies made of concrete are known from the publications DE 693 19 001 T2, DE 694 18 116 T2 and DE 694 09 782 T2.

[0004] Furthermore, a method and a device for the production of differently colored concrete block products are known from DE 10 2006 057 039 A1, in which a mold is filled mechanically with different colored concrete materials and a core concrete material.

[0005] The German patent application DE 10 2004 062 656 A1 describes a method for producing concrete blocks and concrete slabs, in which core concrete and then facing concrete are first poured into a mold having several recesses, and then, before the facing concrete is compacted, at least a portion of a colored and / or differently colored and / or differently colored finishing material is thrown onto the mold using an application device. After final compaction, the surface and / or edges of the produced concrete blocks or concrete slabs can be treated with brushes, in particular textured.

[0006] For example, German patent application DE 10 2010 025 024 A1 describes a process for manufacturing a concrete block in which a core concrete is first mixed and fed into a mold, and a facing concrete is also mixed and fed into the mold. The core concrete is poured into the mold as the base layer of the concrete block, and the facing concrete is poured into the mold on top of the core concrete as the top layer of the concrete block. The surface of the top layer is given a multidimensional shape with at least one embossing and / or raised area. This is achieved by reshaping the surface of the top layer with a suitable die or stamp, or a forming plate.

[0007] A disadvantage of this method is that a separate mold or printing die or a separate bearing plate must be manufactured for each desired shape of the surface of the top layer, which is very complex when there are a large number of different shapes. Description of the invention

[0008] The object of the present invention is to provide a method for the production of concrete elements that enables a simpler, more flexible and faster production of different surface structures of the facing concrete layer.

[0009] This problem is solved by the method for manufacturing concrete elements according to claim 1.

[0010] A method for producing concrete elements, in particular concrete blocks and / or concrete slabs with at least one predetermined surface texture, is proposed. These concrete elements can be for use in outdoor and / or indoor areas. The size of the concrete elements is not decisive for the present method. The thickness of the concrete elements is also irrelevant, as long as it is thick enough to allow the surface texture to be formed. Concrete elements can, for example, be in the form of precast concrete blocks according to DIN V 18500, concrete landscaping elements according to DIN EN 13198, concrete paving stones or slabs according to DIN EN 1338, or concrete kerbstones according to DIN EN 1340. The method according to the invention is a method for producing concrete paving stones.

[0011] The specified surface structure includes, in particular, indentations and / or raised areas, the number, position, shape, length, and / or depth or height of which can be individually selected within a wide range. It can consist of only one type of indentation or raised area, or a combination of different types, for example, long, thin indentations with a shallow depth combined with short, wide indentations with a greater depth. The surface structure can be purely decorative or, if applicable, informative, or it can also serve, for example, as a slip-resistant feature.

[0012] In this process, core concrete is poured into at least one mold for multiple stones and / or slabs and then compacted. This creates a core concrete layer within the mold. The core concrete is selected to withstand the stresses acting on the concrete element. Since the core concrete is typically not visible when the concrete element is in use, a coarser and less expensive concrete can be used for the core. The concrete can be compacted, for example, using tamping tools that are pressed onto the concrete with high pressure.

[0013] A facing concrete layer is poured onto the core concrete, creating a facing layer which can then be at least partially compacted. The concrete, including both the core concrete and the facing concrete (or the layers created from it), is then preferably cured together. At least before the concrete cures, the facing concrete layer is treated with at least one treatment device. This treatment device is designed to create the specified surface texture on the concrete elements.

[0014] According to the invention, the treatment device is moved program-controlled to one and / or more surface positions of the facing concrete layer and / or along at least one surface section and / or surface area of ​​the facing concrete layer by means of a traversing and / or adjusting device, so that at least a predetermined surface structure of the facing concrete layer is created, at least section by section.

[0015] Since the treatment process is program-controlled, different surface textures can be easily achieved by changing the program. This allows for flexible and rapid production of various surface textures.

[0016] Preferably, the traversing and / or adjusting device can move the treatment device to any position on the surface of the facing concrete layer, so that every area of ​​the surface of the facing concrete layer can be treated.

[0017] According to the invention, the surface of the facing concrete layer is treated with one or more treatment elements of the treatment device. One such treatment element is a brush which, when moved over the facing concrete layer, creates a multitude of closely spaced, thin indentations in the facing concrete layer. (Another treatment element is a spatula, which can be designed in various shapes and sizes. A spatula can be used to create both point impressions and short or long linear indentations.)

[0018] According to the invention, the treatment element of the treatment device is also selected program-controlled and the depth of the depression to be created in the facing concrete layer is determined program-controlled.

[0019] Advantageously, at least one treatment unit is moved program-controlled by at least one robot arm of a robotic unit. The robotic unit can be integrated into concrete element production systems in a space-saving manner, and with a suitably designed robotic arm, the treatment unit can reach all surface positions of the facing concrete layer.

[0020] It is advantageous if at least the treatment equipment is controlled by a program using at least one control routine implemented in a control unit. The control unit can also control further process steps in the production of concrete elements, such as providing the at least one mold, filling and / or compacting the core concrete and / or facing concrete layer, and / or transporting the finished concrete elements. The control routine can preferably be easily adapted to different surface structures and / or reprogrammed to generate new surface structures.

[0021] It is also advantageous if the treatment system is controlled in such a way that concrete elements with at least one identical or highly similar surface structure, or with a different, preferably individual, surface structure, are produced. Concrete elements with an identical or highly similar surface structure have a particularly uniform appearance, while concrete elements with a different surface structure are reminiscent of natural stone. Furthermore, an individual surface structure increases the exclusivity of the concrete elements.

[0022] Advantageously, compaction is carried out using a press, and the treatment unit is moved between the facing concrete layer and the press. The concrete elements do not need to be moved during the steps of filling and compacting the core concrete and facing concrete, nor during the treatment of the facing concrete layer; therefore, the production of the concrete elements can take place in a small space.

[0023] It is also advantageous if at least one application device applies additive material to the facing concrete layer before compaction. This additive material can further modify the structure and / or appearance of the facing concrete surface.

[0024] It is advantageous if the application device is program-controlled and moved to one and / or more surface positions of the facing concrete layer and / or along at least one surface section and / or area of ​​the facing concrete layer for the application of additive material to the facing concrete layer, at least in sections. The application device can then preferably reach the entire surface of the facing concrete layer and thus selectively apply additive material to any desired position on the surface of the facing concrete layer. The application device can be moved using the same traversing or adjustment mechanism that also moves the treatment unit. The application device and the treatment unit can be moved together and each used as needed. Alternatively, the traversing or adjustment mechanism can be moved independently.The positioning device picks up the application device, moves it, and sets it down again, and then picks up the treatment device, moves it, and sets it down again. Another option is for the application device to be moved using a further positioning and / or positioning device.

[0025] Advantageously, the application device is moved programmatically by means of the robot arm or at least another robot arm of the robot unit. If the application device is moved by the same robot arm that moves the treatment device, only one robot arm is required for moving both the application and treatment devices, which is both cost-effective and space-saving.

[0026] It is advantageous if the application device is controlled programmatically by means of the control routine executed in the control unit or by means of another control routine executed in the control unit. The control routine should preferably be quickly switchable to different surface designs and / or easily programmable.

[0027] It is advantageous if the application device is controlled in such a way that concrete elements are produced with identical or highly similarly applied additive material, or with different, preferably individually applied additive material. Analogous to the surface structure treated by the treatment device, concrete elements with identical or highly similarly applied additive material exhibit a particularly uniform appearance, while concrete elements with different, preferably individually applied additive material are reminiscent of natural stone and, moreover, possess a heightened exclusivity.

[0028] Advantageously, the additive material is conveyed to the dispensing device, and / or the additive material is carried in a container along with the dispensing device and the container is refilled as needed. Conveying can be achieved, for example, via a feeder line such as a conveyor belt or a pipeline, using conveying devices such as a screw drive or a slide gate. The feeder line can, for example, run along the robot arm. If the additive material is conveyed to the dispensing device, the dispensing device can be relatively small. If, on the other hand, the additive material is carried in a container along with the dispensing device, then the feeder line can be omitted; however, the container must be moved together with the dispensing device.

[0029] It is advantageous to vary the type and / or quantity of the applied additive material along the surface, as this creates particularly attractive concrete elements.

[0030] It is advantageous if the additive material is a finishing material and / or colorant. Finishing materials can include, for example, aggregates, precious or semiprecious stone particles, mica, and / or metal shavings. Besides the visual effect, the finishing material can also have other positive effects on the surface properties of the facing concrete layer, such as improved adhesion or increased durability due to reduced abrasion. The colorant can also serve aesthetic purposes or be used to convey information, for example, as boundary strips or information panels integrated into the concrete element.

[0031] Furthermore, a device for producing concrete elements, in particular concrete blocks and / or concrete slabs, is proposed. According to the invention, the concrete elements are produced according to the method described above. In particular, concrete elements with various surface structures can be produced flexibly and quickly using the device.

[0032] The device comprises at least one treatment unit and a traversing and / or adjusting unit, wherein the traversing and / or adjusting unit is designed to move the treatment unit to one and / or more surface positions of a facing concrete layer of the concrete element and / or along at least one surface section and / or surface area of ​​the facing concrete layer.

[0033] Further developments, advantages, and possible applications of the invention will also become apparent from the following description of exemplary embodiments and from the figures. All features described and / or illustrated are, individually or in any combination, fundamentally the subject matter of the invention, irrespective of their compilation in the claims or their cross-reference. The content of the claims is also incorporated into the description. Brief description of the drawings

[0034] The invention will be explained in more detail below with reference to exemplary embodiments in conjunction with the drawings. The drawings show... Fig. 1a and Fig. 1b a schematic longitudinal section through or a schematic top view of a device for producing concrete elements during the pouring of core concrete, Fig. 2a and Fig. 2b a schematic longitudinal section through or a schematic top view of the device made of Fig. 1a and Fig. 1b during the compaction of the core concrete, Fig. 3a and Fig. 3b a schematic longitudinal section through or a schematic top view of the device made of Fig. 1a and Fig. 1b when pouring facing concrete, Fig. 4a and Fig. 4b a schematic longitudinal section through or a schematic top view of the device made of Fig. 1a and Fig. 1b when applying additional material, Fig. 5a and Fig. 5b a schematic longitudinal section through or a schematic top view of the device made of Fig. 1a and Fig. 1b during the compaction of the facing concrete layer, Fig. 6a and Fig. 6b a schematic longitudinal section through or a schematic top view of the device made of Fig. 1a and Fig. 1b when treating the facing concrete layer, Fig. 7 a schematic longitudinal section through an application device and Fig. 8 a schematic longitudinal section through a treatment facility. Ways to implement the invention

[0035] Identical reference numerals are used in the figures for identical or similarly functioning elements of the invention. Furthermore, for the sake of clarity, only those reference numerals necessary for describing the respective figure are shown in the individual figures.

[0036] Fig. Figure 1a shows a schematic longitudinal section through a device 1 for producing concrete elements 2 and Fig. Figure 1b shows a schematic top view of this device 1. The concrete elements 2 can be, in particular, concrete blocks or concrete slabs. Concrete elements 2 within the meaning of the invention can, for example, be in the form of precast concrete blocks according to DIN V 18500, concrete garden design elements according to DIN EN 13198, concrete paving stones or slabs according to DIN EN 1338, or concrete kerbstones according to DIN EN 1340.

[0037] The concrete elements 2 are manufactured in a corresponding mold 3. The number of recesses provided in the mold 3 for the concrete elements 2 can, of course, be varied from the one specified in Fig. The figures shown in 1b differ; usually, a larger number of concrete elements 2 are produced simultaneously. Furthermore, it is conceivable that two or more molds 3 are used side by side for the production of concrete elements 2.

[0038] In the Fig. 1a and Fig. In the first step of the process for producing concrete elements 2, as shown in Figure 1b, core concrete 4 is poured into the mold 3. The core concrete 4 is poured using a filling device 5, which is shown here by way of example as a funnel-shaped container 6 with an outlet 7. In this embodiment, the filling device 5 is movable along two rails 8 in a transverse direction Q of the device 1. Furthermore, the rails 8, together with the filling device 5, are preferably also provided to be movable along a longitudinal direction L of the device 1 (not shown for clarity). By being movable in the transverse direction Q and / or longitudinal direction L, the filling device 5 can reach all recesses of the mold 3 and fill them with core concrete 4.The filling of mold 3 with core concrete 4 is controlled by a control and / or regulation unit (not shown in the figures) such that a predetermined quantity and thus a predetermined fill level of core concrete 4 is poured into the recesses of mold 3. After the core concrete 4 has hardened, this forms a core concrete layer of the concrete element 2.

[0039] The precise design of the filling device 5 and the means for moving the filling device 5 is immaterial for the method according to the invention. For example, a filling device 5 is conceivable in which only a long hose, connected to a concrete reservoir, is moved to the recesses of the mold 3. Likewise, it is possible, for example, that the filling device 5 is moved by means of robot kinematics comprising at least rotatably or pivotably connected robot arms.

[0040] In the Fig. 2a and Fig. In the next step shown in Figure 2b, the core concrete 4 is at least partially compacted. For this purpose, rams 10 of a press 11, attached to press rods 9, are pressed onto the core concrete 4 under high pressure. The pressure and the duration of the compaction depend, among other things, on the composition of the core concrete 4 and the thickness of the core concrete layer 4.

[0041] The compacted core concrete 4 is then, as described in Fig. 3a and Fig. 3b shows the facing concrete 12 being filled. This is done analogously to the filling of the core concrete 4, which is in Fig. 1a and Fig. As shown in Figure 1b. For filling the facing concrete 12, either the filling device 5, which was already used to fill the core concrete 4, can be used, or a separate filling device can be provided. The advantage of the latter solution is that cleaning the filling device 5 is unnecessary when switching from core concrete 4 to facing concrete 12 (and vice versa). The filling of the mold 3 with facing concrete 12 is again controlled by the control unit; specifically, a predetermined quantity and thus a predetermined fill level of facing concrete 12 is poured into the recesses of the mold 3 onto the existing core concrete 4.

[0042] In an embodiment of the invention not shown in the figures, reinforcement can be provided on the filled core concrete or the resulting core concrete layer 4 before the facing concrete 12 is applied. Steel mesh, steel fibers, or similar materials can be used, for example, to produce the reinforcement, which is preferably planar. After the reinforcement has been placed, the facing concrete 12 is applied. The reinforcement is particularly advantageous for stiffening the concrete element 2. This makes it possible, in particular, to produce large-format concrete elements 2 or special formats. The reinforcement is preferably inserted into the mold 3 mechanically during the manufacturing process.

[0043] In the Fig. 4a and Fig. Figure 4b now shows, as an optional intermediate step, the application of additive material 13 to the facing concrete layer 12 produced by the placement of the facing concrete. This step is preferably carried out after the placement. If compaction of the facing concrete or the facing concrete layer 12 is planned, the application of the additive material 13 can be carried out before or after compaction of the facing concrete 12, depending on the additive material 13 used and its physical properties.

[0044] The additive material 13 can be, for example, a finishing material such as aggregates, precious or semiprecious stone particles, mica, and / or metal shavings, and / or colorant. This additive material serves optical or aesthetic purposes, but in the case of finishing material, it can also improve adhesion or increase durability due to reduced abrasion. Furthermore, colorant applied to the facing concrete layer 12 can serve to convey information, for example, as boundary strips or information signs integrated into the concrete element 2. Finally, the additive material 13 can also have a functional function, for example, by creating a rough surface to increase slip resistance.

[0045] The additive material 13 is applied to the facing concrete layer 12 by an application device 14. The application device 14 is movable by means of a traversing and / or adjusting device 15, preferably such that all surface positions of the facing concrete layer 12 can be reached by the application device 14. The operation of the application device 14 is program-controlled, preferably by means of a control routine implemented in the control and / or regulation unit (not shown).

[0046] The application device 14 can be moved programmatically to virtually any surface position of the facing concrete layer 12, and the additive material 13 can be applied to the facing concrete layer 12 at these surface positions. Alternatively, the application device 14 can be moved along a surface section and / or surface area of ​​the facing concrete layer 12 and continuously apply additive material 13 to the facing concrete layer 12. In this case, the type and / or quantity of the applied additive material 13 can be varied along the surface section to achieve special effects.

[0047] The traversing and / or adjusting device 15 is designed in this case as a robot unit or robot kinematics with at least one robot arm 16, wherein the application device 14 is preferably arranged at the free end of the at least one robot arm 16. The working range of the robot unit or the robot kinematics is designed such that the application device 14 can reach all surface positions of the facing concrete layer 12. When the application device 14 is not used, the robot arm 16 is retracted into the space provided in the Fig. 1b, Fig. 2b and Fig. The robot arm 16 is positioned in the rest position shown in Figure 3b. In the rest position, the robot arm 16 is removed from the mold 3 and therefore does not interfere with other equipment, such as the filling device 5 or the equipment for compacting the concrete layers 4, 12.

[0048] For the present invention, the specific technical design of the traversing or adjusting device 15 is not decisive. For example, the application device 14 can be moved by means of a rail system (not shown here), wherein the rails preferably enable the application device 14 to be moved to all surface positions of the facing concrete layer 12.

[0049] In the Fig. 5a and Fig. 5b shows the compaction of the facing concrete layer 12. The compaction of the facing concrete layer 12 is carried out analogously to that described in the Fig. 2a and Fig. 2b compaction of the core concrete 4 by means of the stamps 10 of the press 11 attached to the press rods 9.

[0050] The compaction of the facing concrete layer 12 is followed by the work in the Fig. 6a and Fig. Figure 6b shows the treatment of the facing concrete layer 12 with a treatment device 17. In the present embodiment, the treatment device 17 is arranged together with the application device 14 at the end of the robot arm 16. However, other variants are conceivable: for example, the treatment device 17 can be arranged at the end of the robot arm 16 and the application device 14 at the end of another robot arm. Alternatively, the application device 14 and the treatment device 17 can be designed such that they can be connected to the end of the robot arm 16 via a coupling. When not in use, the application device 14 and the treatment device 17 are then parked in a designated position and coupled to the end of the robot arm for the application of additives or the treatment of the facing concrete layer.Furthermore, it is possible that no application device 14 is provided; in that case, only the treatment device 17 is arranged at the end of the robot arm 16.

[0051] Preferably, the treatment device 17 can be moved to any surface position of the facing concrete layer 12 by means of the traversing and / or adjusting device 15. The process is program-controlled, preferably by means of a control routine implemented in the control unit.

[0052] The surface of the facing concrete layer 12 is treated using one or more treatment elements 22 of the treatment device 17, which are brought into contact with the facing concrete layer 12. The height of the treatment elements 22, and thus the immersion depth into the facing concrete layer 12, can preferably be varied by program control. The greater the immersion depth, the larger the depression created in the facing concrete layer 12. Suitable treatment elements 22 include, for example, brushes or spatulas.

[0053] The treatment elements 22 can create a point depression at a specific surface position of the facing concrete layer 12 or be moved in contact with the facing concrete layer 12 by the traversing or adjusting device 15, so that linear depressions are created.

[0054] The application of the treatment elements 22 is program-controlled, preferably also by means of the control routine executed in the control unit. In this way, a wide variety of surface structures can be created in the facing concrete layer 12. The surface structures can be created so that they are identical or at least highly similar for each concrete element 2. However, the surface structures can also be created so that they are different, preferably individual, for each concrete element 2. Furthermore, it is also possible to create surface structures such that, for example, a linear depression ends at the edge of one concrete element 2 and then continues at the corresponding edge of the next concrete element 2, thus creating a continuous surface structure.

[0055] The treatment of the surface of the facing concrete layer 12 is followed by the hardening of the concrete (not shown here), at which point the concrete elements 2 are finished.

[0056] Fig. Figure 7 shows a schematic longitudinal section through an application device 14. The application device 14 has two containers 18 in which additive material 13 is held. Preferably, this additive material 13 is of a different type, so that different designs of the concrete elements 2 are possible. Depending on the desired concrete element 2, application devices 14 with only one container 18 or with more than two containers 18 are also conceivable.

[0057] The containers 18 have an upper opening 19 and a lower opening 20. Additional material 13 can be added via the upper opening 19 as needed. A movable cover element 21 is arranged in the area of ​​the lower opening 20. The cover element 21 can completely close, partially open, or fully open the lower opening 20. If the lower opening 20 is partially or fully open, the additional material 13 can fall from the container 18 onto the facing concrete layer 12. Depending on the degree to which the lower opening 20 is open, no, a little, or a large amount of additional material 13 falls onto the facing concrete layer 12 per unit of time. The cover element 21 is preferably moved by a program, particularly preferably by means of the control routine implemented in the control device.

[0058] Finally, it shows Fig.Figure 8 shows a schematic longitudinal section through a treatment device 17, which has two treatment elements 22, although of course a different number of treatment elements 22 is also conceivable. One treatment element 22 is designed as a spatula 22.1, while the other treatment element 22 is designed as a brush 22.2.

[0059] Each treatment element 22 is assigned an adjustment unit 23, which determines the vertical position of the treatment element 22 and thus the immersion depth of the treatment element 22 in the facing concrete layer 12. Depending on the immersion depth, different depressions result in the facing concrete layer 12. The adjustment unit 23 is preferably operated by program control, particularly preferably by means of the control routine implemented in the control device.

[0060] In an advantageous embodiment of the invention, the treatment elements 22 are furthermore rotatably mounted about a vertical axis. The rotation about the vertical axis can, for example, also be program-controlled by the adjustment unit 23. By rotating the treatment elements 22, it is possible, for example, to ensure that the orientation of the treatment element 22 relative to the surface distance traveled by the treatment device 17 always remains constant. Alternatively, the treatment elements 22 can be rotated during the treatment of the surface of the facing concrete layer 12 in such a way that the rotation produces visually interesting effects. Reference symbol list 1 Device 2 concrete elements 3 Form 4 Core concrete or core concrete layer 5 Filling device 6 boilers 7 Outlet 8 rails 9 Press rod 10 stamps 11 Press 12. Precast concrete or precast concrete layer 13 Additional material 14 Application device 15 Moving or adjusting device 16 robot arm 17 treatment facility 18 containers 19 upper opening 20 lower opening 21 Cover element 22 Treatment element 22.1 Spatula 22.2 Brush 23 Adjustment unit L Longitudinal direction Q transverse direction

Claims

[1] A method for producing concrete paving stones (2) with at least one predetermined surface structure, in which a core concrete (4) is poured into and compacted into at least one mold (3) having a plurality of recesses for the simultaneous production of several concrete paving stones (2), thereby first producing a core concrete layer, in which a facing concrete (12) is then poured onto the compacted core concrete (4) in the multiple recesses to produce a facing concrete layer (12), and subsequently the poured concrete (4; 12) is hardened, in which, prior to the hardening of the concrete (4; 12), the surface of the produced facing concrete layer (12) is treated with at least one treatment device (17), thereby producing the predetermined surface structure in the form of depressions in the facing concrete layer (12).wherein the treatment device (17) is moved by means of a traversing and / or adjusting device (15) to one and / or more surface positions of the facing concrete layer (12) and / or along at least one surface section and / or surface area of ​​the facing concrete layer (12) to generate at least a predetermined surface structure of the facing concrete layer (12) in a program-controlled manner, wherein the surface of the facing concrete layer is treated with one or more treatment elements (22, 22.1, 22.2) of the treatment device (17) and the treatment element (22, 22.1, 22.2) of the treatment device (17) is selected in a program-controlled manner and wherein the depth of the depressions to be produced in the facing concrete layer is determined in a program-controlled manner. [2] Method according to the previous claim, characterized by, that at least one treatment facility (17) is operated program-controlled by means of at least one robot unit with at least one robot arm (16). [3] Method according to any one of the preceding claims, characterized by , that at least the treatment facility (17) is operated program-controlled by means of at least one control routine executed in a control and / or regulation unit. [4] Method according to any one of the preceding claims, characterized by , that the treatment device (17) is controlled in such a way that concrete paving stones (2) are produced with at least one identical or highly similar surface structure or a different, preferably individual, surface structure. [5] Method according to any of the preceding claims, characterized by , that the core concrete (4) and / or the facing concrete (12) is at least partially compacted after being poured. [6] Method according to claim 5, characterized by, that the compaction is carried out by means of a press (11) and the treatment device (17) is moved between the facing concrete layer (12) and the press (11). [7] Method according to any of the preceding claims, characterized by , that at least one application device (14) preferably applies additional material (13) to the facing concrete layer (12) before compacting the facing concrete layer (12). [8] Method according to claim 7, characterized by , that the application device (14) is moved by means of the traversing or adjusting device (15) or by means of a further traversing and / or adjusting device to one and / or more surface positions of the facing concrete layer (12) and / or along at least a surface section and / or a surface area of ​​the facing concrete layer (12) for the application of additive material (13) to the facing concrete layer (12) in a program-controlled manner. [9] Method according to one of claims 7 or 8, characterized by , that the application device (14) is moved program-controlled by means of the robot arm (16) or by means of at least one further robot arm of the robot unit. [10] Method according to any one of claims 7 to 9, characterized by , that the application device (14) is operated program-controlled by means of the control routine executed in the control device or by means of another control routine executed in the control device. [11] Method according to any one of claims 7 to 10, characterized by , that the application device (14) is controlled in such a way that concrete paving stones (2) are produced with identical or highly similarly applied additive material (13) or with differently, preferably individually applied additive material (13). [12] Method according to any one of claims 7 to 11, characterized by, that the additive material (13) is conveyed to the application device (14) and / or the additive material (13) is carried in a container (18) with the application device (14) and the container (18) is refilled as required. [13] Method according to any one of claims 7 to 12, characterized by , that the type and / or quantity of the added material (13) is varied along the surface length. [14] Method according to any one of claims 7 to 13, characterized by , that the additional material (13) is finishing material and / or coloring material.

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