Composite floor covering

Abstract

The invention relates to a composite floor covering (1) made of mineral granules and a polymer material, which is provided with a nonwoven fabric (2, 3), wherein the granules are mineral granules that are bonded with the polymer material to form a porous composite floor covering (1). The invention is characterized in that the nonwoven fabric (2, 3) has a pore size of no more than 100 µm.

Description

[0001] The invention relates to a composite floor covering according to the preamble of claim 1 and to a road shoulder or road surface which is designed as such a composite floor covering. BACKGROUND OF THE INVENTION

[0002] In the prior art, composite floor coverings for open areas are known, consisting of a mineral granulate bound with a polymer material. Additionally, the polymer granulate can also be provided in a bound or unbound form.

[0003] These surfaces are typically porous, allowing water to pass through. Because puddles do not form on them, they are ideally suited for public squares and sports facilities.

[0004] From the generic EP 2 118 160 A1 or DE 10 2007 012 973 A1, a water-permeable composite stone body is known, which consists of 99 to 65 percent by weight of granules made of mineral plastics with a grain size of 0.5 to 100 mm and 1 to 35 percent by weight of a two-component polyurethane adhesive.

[0005] From DE 20 2006 013 964 U1, it is known to mix the filling material of a gabion with binding agents. A masonry structure can be provided for building gabion stone basket walls, wherein the stones within the gabion stone basket are vibrated into place or firmly connected to each other with filling material or by means of binding materials.

[0006] In DE 20 2008 016 807 U1 an open-pore molded body is described in which glass fiber fleeces can also be integrated.

[0007] From EP 018 639 A1, a road shoulder is also known, wherein the base of the shoulder consists of a mixture of stone, sand, humus, and numerous other elements, encased in a layer of geotextile. This aims to create a vegetation layer so stable that it can also be used for road shoulders or as parking areas without vehicles sinking into the grass.

[0008] DE 41 30 768 C1 discloses a load-bearing and support pad for earthworks and road construction. The core material is encased in a geotextile or nonwoven fabric, and it is also proposed to include geotextile layers within the support pads that extend over parts of the cross-section.

[0009] EP 1 464 756 A1 describes a structure for a playground, in which the layer structure is reinforced by geotextile layers.

[0010] However, composite floor coverings made of mineral granules and polymer material are subject to environmental criticism due to the polymer material. Even with bonded polymer material, abrasion is unavoidable, resulting in microplastics being released into the environment.

[0011] On the other hand, these surfaces offer significant advantages in terms of maintenance and upkeep compared to conventional gravel or tar surfaces. While gravel surfaces do not seal the surface, they require a great deal of maintenance. Tar surfaces seal the surface, making it impermeable to water. Interlocking pavers, however, are very complex to install.

[0012] US Patent 2006 / 0032807 A1 discloses a filter system for filtering ions, complexes, or other particles from an aqueous flow. The filter device can be made of various materials, such as sand, polymer material, ash, perlite, or a solid, porous matrix, such as cementitious porous pavement (CPP). The CPP is preferably porous enough to allow water to flow through the pores. For example, a road shoulder can be constructed with such a CPP. Membrane filters with a pore size on the order of 0.1 to 50 microns and even up to 3000 microns or more are also disclosed as a further filter material. This membrane material is preferably made of cellulose.

[0013] GB 2 416 130 A shows a construction for a floor covering in which different granular materials are used. Among other things, a fleece can be used.

[0014] GB 2 396 379 A concerns a drainage floor covering composed of several layers. A surface layer can be porous asphalt or porous concrete. The porous asphalt can contain bitumen, which may be polymer-modified, and granular aggregates. Beneath the surface layer are further coarser-grained layers and a semipermeable membrane. The membrane is a synthetic woven geotextile membrane.

[0015] EP 0 390 755 A2 describes a laminated geotextile composed of multiple layers, intended for use as a filter and / or drainage system. The layers comprise woven or non-woven geotextiles made of various materials with different strengths and pore sizes.

[0016] CN 106 565 175 A discloses a multi-layered floor covering for draining or storing water, the layers being characterized by different material compositions. The materials range from concrete to quartz sand to polyurethane. A water-permeable geotextile is provided between a base layer and the layer above it.

[0017] EP 1020566 A2 describes a device and a method for restoring the water permeability of a porous paving surface layer of a drainage system or a water-permeable pavement. In this method, a high-pressure jet of water is directed onto the surface to clean blocked air pores.

[0018] The EP 2210982 A2 is a mobile high-pressure cleaning machine for outdoor plastic flooring. The high-pressure cleaning machine features a spray device to spray water at high pressure onto the floor surface to be cleaned, and a collection device to collect the sprayed water and dirt using suction air. TASK AND SOLUTION

[0019] The task is therefore to create a composite floor covering that is very environmentally friendly and can provide a filtering effect in the long term.

[0020] The problem is solved by a composite floor covering or polymer floor covering with the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

[0021] According to the invention, a porous composite floor covering or polymer covering is provided, which is equipped with at least one filter fleece section and which consists of a mineral granulate bonded with the polymer material to form a porous composite floor covering. The composite floor covering is characterized in that several filter fleece sections are arranged within it, wherein the filter fleece sections are offset from one another in at least two planes and overlap in the vertical projection, and wherein the filter fleece sections have a pore size of no more than 100 µm.

[0022] At least on the underside of the flooring, a fleece is preferably arranged, the fleece having a pore size of no more than 100 µm. The porous composite flooring provides a first filtering effect for coarse-grained materials, such as sand. These are retained in the pores of the composite flooring. Fine dust, including microplastics, is washed by water through the composite flooring to the fleece, where it is trapped and thus does not enter the environment. The fleece therefore serves as a second filter for capturing fine dust and other fine particles.

[0023] The composite flooring can be cleaned at regular intervals. During cleaning, for example, a high-pressure water jet is forced into the composite flooring, and the water is then extracted using a suction device. This allows the flooring to be cleaned and freed of dirt after a certain period of use, once the pores become clogged with dirt. It has been shown that a composite flooring made of mineral particles bonded with a polymer material can possess the necessary coarse porosity for filtering out coarse particles and allowing water to be injected, while also being sufficiently stable to withstand repeated high-pressure water cleaning. There are also porous floor coverings in which the particles are bonded with a mineral binder, such as a cement-based one.Large pores can also be provided in this process. However, such mineral binders are not elastic, which means they break and are destroyed when cleaned with water under high pressure. With such floor coverings, the particles would detach with repeated cleaning.

[0024] The combination of a porous composite floor covering, made from a mineral granulate and an elastic polymer material, and a fleece with a small pore size allows the filtering of coarse and fine substances and can be cleaned regularly, thus enabling a long-term filtering effect.

[0025] It is very advantageous that the nonwoven fabric has a pore size of no more than 100 µm. It can also be even finer and preferably no more than 50 µm to reliably retain microparticles and fine dust.

[0026] In the case of og DE 20 2008 016 807 U1, the glass fiber fleece GV60 is used, which has a pore size of 600 µm (60g / m 2< corresponds to approx. 600 µm pore size) and therefore does not act as a filter.

[0027] In the present invention, the coating can be removed after its service life and disposed of properly.

[0028] In particular, the surface can be used for road shoulders.

[0029] The composite flooring according to the invention can be used to produce water-permeable, open-pored bound road shoulders as well as car parking areas and retention systems for surface drainage (ditches, trenches, infiltration basins) of the roadways and parking areas.

[0030] According to the RSV (Guidelines and Regulations for Road Construction), a road shoulder is between 0.50 m and 1.00 m wide. The shoulder thickness is usually at least 8 cm.

[0031] The composite flooring can also be used as a sports surface, particularly for tennis or football pitches, where a fine-grained granulate can be loosely applied to it to resemble a traditional clay court. This granulate can be either plastic or sand. This can lead to plastic abrasion, which is captured by the underlayment. The coarse-grained plastic granulate is worn away during use, resulting in fine-grained abrasion. The sand granulate causes fine-grained abrasion on the composite flooring.

[0032] A cleaning device not according to the invention can be provided for cleaning a composite floor covering as described above, wherein the cleaning device has a cleaning nozzle for pushing water or an aqueous solution into the porous floor covering and a suction device for extracting the water from the floor covering.

[0033] This cleaning device allows the composite flooring to be cleaned at regular intervals, for example, once or twice a year. This process removes dirt from the pores of the composite flooring, ensuring that water can continue to penetrate it effectively and that the filtering effect of the composite flooring remains intact.

[0034] The cleaning device preferably includes a filter system for filtering the extracted water. This allows the water to be reused and a concentrated layer of dirt to be collected. This is particularly advantageous when the cleaning device is mounted on a street cleaning vehicle.

[0035] The cleaning device can be equipped with a pump that supplies water or an aqueous solution to the nozzle at a pressure of at least 10 bar, in particular at least 20 bar or at least 50 bar, and preferably at least 100 bar. In practice, it has been found that it is advantageous to supply the water or aqueous solution to the nozzle at a pressure of up to 140 bar.

[0036] The cleaning device may have a suction or pressure bar in which one or more cleaning nozzles and / or one or more suction nozzles are integrated.

[0037] The suction or pressure beam has a length of at least 30 cm and preferably at least 50 cm. The maximum length of the suction or pressure beam is preferably 1 m or 1.2 m, respectively.

[0038] A street cleaning vehicle for cleaning the composite floor covering as described above may be provided, wherein the street cleaning vehicle has a cleaning device as described above.

[0039] Such a street cleaning vehicle with a suction or pressure bar is preferably designed so that the suction or pressure bar can be arranged at different angles of inclination relative to the direction of travel of the street cleaning vehicle. This allows the effective width to be changed by tilting the suction or pressure bar and adapted to the width of the section to be cleaned, in particular the road shoulder. BRIEF DESCRIPTION OF THE DRAWING

[0040] The invention will now be explained in more detail with reference to the exemplary embodiments shown in the drawing.

[0041] They show: Fig. 1a schematic cross-sectional view of a composite floor covering according to the invention in a first embodiment, Fig. 2 a schematic cross-sectional view of a composite floor covering according to the invention in a second embodiment, Fig. 3 a schematic cross-sectional view of a composite floor covering according to the invention in a third embodiment, Fig. 4 a schematic cross-sectional view of a composite floor covering according to the invention in a fourth embodiment, Fig. 5 a schematic cross-sectional view of a non-inventive composite floor covering according to a fifth embodiment, Fig. 6 a schematic cross-sectional view of a composite floor covering according to the invention in a sixth embodiment, Fig. 7 a schematic cross-sectional view of a seepage basin with a composite floor covering according to the invention, Fig. 8a schematic cross-sectional view of a composite floor covering according to the invention when used as a sports floor covering in a football pitch, Fig. 9 a schematic cross-sectional view of a non-inventive composite floor covering according to a seventh embodiment, Fig. 10 a schematic cross-sectional view of a composite floor covering according to the invention, in accordance with an eighth embodiment, Fig. 11 a schematic cross-sectional view of a composite floor covering according to the invention when used as a sports floor covering in a tennis court, Fig. 12 a schematic side view of a cleaning device for cleaning a composite floor covering according to the invention, Fig. 13a schematically a cross-sectional view of the cleaning device in the area of ​​a suction or pressure bar according to a first embodiment, and Fig. 13bSchematic cross-sectional view of the cleaning device in the area of ​​a suction or pressure bar according to a further embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0042] The following describes a first embodiment of a composite floor covering 1 that forms a banquet ( Figure 1 ).

[0043] The composite floor covering 1 consists of a mineral granulate and a binder.

[0044] The mineral aggregate comprises, for example, gravel and / or chippings (soft and hard rocks such as limestone, diabase, basalt, gneiss). The mineral aggregate can consist of a grain size mixture of 2 / 5 mm (i.e., a grading curve between 2 mm and 5 mm), 4 / 8 mm, or 8 / 16 mm, preferably containing a maximum of 10% of the mass weight of the rock in the pavement, with a fine-grained material of up to 0.2 mm. The grading curve is determined individually depending on the load and requirements of the respective project.

[0045] The binder can be a one-component or two-component coating material, for example, polyurethane-based. However, other polymers, such as those based on epoxy, polyethylene, polypropylene, etc., are also suitable as binders. A composite floor covering made with these polymers is resistant to frost and de-icing salt.

[0046] In the present embodiment, the binder comprises between 3% and 5% by mass. The mass fraction of the binder should not exceed 10% to ensure sufficient porosity of the composite layer. Generally, the higher the binder content, the lower the porosity of the composite layer. If the binder content is very low, this can impair the strength of the composite layer. Therefore, it is advisable to provide a mass fraction of at least 1%, and particularly at least 2%, of the binder in the composite layer.

[0047] The composite floor covering 1 can be designed with a void content of at least 20% by volume, preferably at least 25% by volume, and particularly at least 30% by volume. The preferred embodiment has a void content of 32% by volume.

[0048] The maximum pore size for a 4 / 8 mm grain size mixture is 10 mm. The minimum pore size is generally in the range of 0.5 to 3 mm. This results in high water permeability and good filtration of coarse particles.

[0049] A filter fleece 2 is provided as a filter medium for fine particles.

[0050] The filter fleece preferably has a minimum weight of 250 g / m². The weight of the filter fleece can also be significantly higher.

[0051] The filter fleece has a maximum porosity of 100 µm. The porosity can also be lower, for example, limited to a maximum of 75 µm, 50 µm, 25 µm, or 20 µm. Such filter fleeces are available from Noravin.

[0052] The porosity of the composite material is one or more orders of magnitude greater than that of the filter fleece. This ensures that a sufficient quantity of water flows through the composite material and is filtered by the filter fleece.

[0053] The pore size of the filter fleece is preferably larger than 10 µm. This ensures sufficient water permeability.

[0054] The filter fleece is laid under the composite covering 1, which forms a shoulder, and pulled up the sides to the shoulder surface.

[0055] In the Figure 1It is evident that the composite floor covering 1, in addition to the filter fleece 2, also has internal filter fleece sections 3. These internal filter fleece sections 3 can have different porosities than the filter fleece 2 and thus serve for coarse and fine filtration.

[0056] The bonded flooring 1 rests on an unbound base course 5. At its edges, it rests with an edge section on a bound base course 6 (asphalt, etc.), which is horizontally butted against the bonded flooring, with the surfaces flush or forming a continuous transition. On the side of the bonded flooring 1 opposite the bound base course 6, a topsoil 4 (e.g., humus) adjoins it. The base course 6 has an approximately horizontal surface. The surface of the bonded flooring 2 slopes from the base course towards the topsoil 4. The slope is, for example, approximately 5° to 10° relative to the base course 6. The topsoil can have the same slope, a steeper slope, a shallower slope, or even be horizontal.

[0057] The width of the composite flooring is determined according to the RVS specifications for banisters.

[0058] In this embodiment, the filter fleece 2 is arranged at least on the entire underside of the composite floor covering and is pulled up and installed like a trough at the joints with the base layer 6 and the top layer 4. The filter fleece 2 thus forms a trough-shaped trough.

[0059] The internal filter fleece sections 3 are designed as strip-shaped sections that extend in the longitudinal direction of the composite floor covering. They are arranged, for example, parallel to the underside of the composite floor covering.

[0060] The composite flooring 2 has a minimum thickness of 8 cm according to RVS. However, the minimum thickness may be less for other applications of the composite flooring.

[0061] The specific design of a road shoulder depends on the requirements of the respective annual traffic volume (ATV) classes, which are determined by the traffic volume (vehicles in 24 hours). Accordingly, the design of the composite pavement can vary.

[0062] The road shoulder is designed with a slope of approximately 5° to 10° relative to the roadway and has a

[0063] In the Figures 2 to 6 Further embodiments of the composite floor covering 2 are shown, which correspond to the one described in Figure 1 The embodiment shown corresponds to the embodiment shown, unless otherwise described below or shown in the figures. Therefore, identical parts are not explained again and are designated with the same reference numerals.

[0064] These further embodiments differ primarily in the arrangement of the internal filter fleece sections 3. According to Figures 1 to 4Several strip-shaped filter fleece sections 3 are provided, arranged alternately offset from one another in several levels (here two levels; more levels are also possible in principle). In the vertical projection, the individual filter fleece sections 3 are arranged slightly overlapping each other. This achieves a uniform coverage without unduly impairing the strength of the composite floor covering 1. As can be seen from the different embodiments, the width and number of filter fleece sections 3 can vary.

[0065] A fifth non-inventional embodiment ( Figure 5) has several filter fleece sections 3, which are arranged diagonally opposite the underside and the top side of the composite floor covering 1. The inclination of the filter fleece sections 3 is such that they are inclined in the opposite direction to the composite floor covering 1, with the inclination being steeper, so that they oppose water running off within the composite floor covering 1 due to its inclination and thus provide a certain retention function, which increases the filter effect ( Figure 5 ).

[0066] In a sixth embodiment according to Figure 6A first and a second section of a composite floor covering 1a, 1b are provided. The first composite floor covering section 1a forms a shoulder, which essentially corresponds to the embodiments described above. This composite floor covering section 1a has several filter fleece sections 3, which are arranged obliquely opposite the underside and the topside of the composite floor covering 1, respectively. The inclination of the filter fleece sections 3 is such that they are inclined in the same direction as the composite floor covering 1, with the inclination being steeper, thereby directing the water to the underside of the composite floor covering 1a. The composite floor covering section 1a can also be designed without filter fleece sections 3 or with the arrangements of the filter fleece sections 3 shown above.

[0067] On the side facing away from the bonded base course, the second bonded soil section 1b is arranged with a buttress to the first bonded soil section 1a. The second bonded soil section 1b forms a drainage trough 7. A filter fleece 2 is arranged below each of the two bonded soil sections, which are laterally pulled up in a trough-like fashion at the end faces of the bonded soil sections 1a and 1b.

[0068] In the second composite floor section 1b, internal filter fleece sections 3 are also arranged, which are strip-shaped and arranged parallel to the underside of the composite floor section 1b. These internal filter fleece sections 3 can be modified in the same way as those of the embodiments described above.

[0069] In the Figure 7Figure 1 shows a schematic cross-sectional view of a seepage basin 16, which is provided with the composite floor covering 1 according to the invention and has a humus-sand mixture 8 on it. A water-permeable gravel layer 15 is arranged beneath the covering. The composite floor covering 1 serves as a permanent filter. Here, it may be advantageous to design the porosity of the composite floor covering 1 to be low, so that a certain retention function is also achieved. The composite floor covering 1 has internal filter fleece sections 3, which are arranged offset from each other in two planes. In such a locally confined application, such as a seepage basin in which large quantities of water are filtered, it may also be advantageous to provide several planes of internal filter fleece sections 3.Preferably, the different levels of internal filter fleece sections 3 have an increasingly lower porosity towards the bottom, so that the upper levels first filter out the coarse material and the lower levels filter out the increasingly finer material.

[0070] In the Figure 8 A schematic cross-sectional view of the composite flooring 1 according to the invention, when used in a football pitch, is shown. A dynamic layer 10 is placed on the composite flooring 1, and further on top of that, an artificial football pitch surface. As in the previously described embodiments, an unbound base layer 5 and sections of gravel 11 (preferably 16 / 32 mm grading curve) in which drainage pipes 12 are arranged are located beneath the surface. The dynamic layer can also be arranged below the composite flooring 1 or omitted entirely.

[0071] In the Figures 9 and 10are two variants of the shaped drainage trough 7 according to the embodiment of the Figure 6 shown, which differ in their arrangement of the inner filter fleece 2 for coarse and fine filtration (see the Figures 2 to 5 ). In the non-inventive embodiment according to Figure 9 The inner filter fleece sections 3 form approximately V-shaped channels in cross-section, preferably extending longitudinally, which filter water very efficiently. According to the embodiment Figure 10 The strip-shaped, internal filter fleece sections 3 are horizontally aligned.

[0072] In the Figure 11A schematic cross-sectional view of the composite flooring according to the invention when used in a tennis court is shown, wherein a load-bearing layer 14 and further a dynamic layer 10 and the tennis court surface layer are placed on top of the surface. Underneath the surface, as in the Figure 8 The embodiment shown includes sections with gravel 11, in each of which a drainage pipe 12 is arranged.

[0073] The composite flooring 1 can also form the surface layer of a tennis court, with loose quartz sand and / or plastic granules applied to the surface layer. Depending on the subsoil, the substructure can be designed with or without drainage pipes. In such an embodiment, an elastic, dynamic layer is preferably arranged beneath the composite flooring 1, which absorbs impacts elastically.

[0074] All the embodiments described above have in common that they have at least one filter fleece 2, which is preferably arranged on the underside of the composite floor covering 1 and in particular over the entire surface of the composite floor covering.

[0075] The composite floor covering 1 can be regularly cleaned with a cleaning device 17 to remove dirt from the pores of the composite floor covering 1 and / or the filter fleece 2.

[0076] The cleaning device 17 comprises a suction / pressure bar 18, which includes a suction nozzle 19 and one or more cleaning nozzles 20. The suction nozzle 19 is connected to a suction pipe 21, which also serves as a support for the suction / pressure bar 18. The suction pipe 21 leads into a filter unit 22, where the aspirated water is separated from the dirt. A further suction pipe 23 extends from the filter unit 22 and can be connected to a suitable suction device. The suction device (not shown) is preferably integrated into a street cleaning vehicle. A water line 24 is also provided, which leads to the cleaning nozzles 20, from which the water exits downwards under high pressure. The water line 24 is connected to a water pump (not shown), which supplies water under pressure. In practice, a pressure of over 100 bar has proven to be very advantageous.

[0077] The cleaning nozzles 20 can be positioned outside the suction nozzle 19 ( Figure 13a ) arranged. They can also be arranged within the suction nozzle 19, as shown in Figure 13b is shown. Figure 13a and Figure 13b Each of the following is a cross-sectional view perpendicular to the direction of movement of the cleaning device. Figure 12 The cleaning device 17 is shown from the front.

[0078] The suction / pressure bar 18 is positioned a few centimeters above the composite floor covering 1 during cleaning. Water or an aqueous solution is introduced into the composite floor covering 1 under pressure via the cleaning nozzles 20. The cleaning water or aqueous cleaning solution is extracted by the suction nozzle 19. This loosens and removes dirt that has become embedded in the pores of the composite floor covering 1. Thus, a composite floor covering according to the invention can be cleaned and its filter effect restored.

[0079] The amount of water supplied is preferably more than 10 l / min, particularly more than 50 l / min, and especially more than 100 l / min. The amount of water supplied can be up to 150 l / min.

[0080] The composite floor covering according to the invention, in conjunction with regular cleaning using such a cleaning device 17, allows for a permanent filtering effect and thus a permanent absorption of dust particles, in particular rubber abrasion from vehicle tires on the road, which can be reliably captured by the composite floor covering.

[0081] The nonwovens used have a pore size of no more than 100 µm. Such small pore sizes are not possible with conventional fabrics that are not nonwovens. However, there are now technical fabrics that can be woven so tightly that they also have a pore size of no more than 100 µm. These technical fabrics are also considered nonwovens with a pore size of no more than 100 µm within the meaning of the present invention.

[0082] The following are examples of the invention: Example 1: A composite floor covering made of granules and polymer material, which is provided with at least one filter fleece section, wherein the granules are mineral granules bonded to the polymer material to form a porous composite floor covering, characterized in that several strip-shaped filter fleece sections are arranged in the composite floor covering, wherein the filter fleece sections are offset from one another in at least two planes and overlap in the vertical projection, and wherein the filter fleece sections have a pore size of no more than 100 µm. Example 2: A composite floor covering according to Example 1, characterized in that a fleece is arranged on the entire underside of the composite floor covering. Example 3: A composite floor covering according to Example 2, characterized in that the fleece has a pore size of no more than 100 µm. Example 4: A composite floor covering according to Example 2 or 3.Example 5: Composite flooring according to one of the 1st to 4th examples, characterized in that at least one section of the nonwoven fabric is integrated into the body formed by the composite flooring. Example 6: Composite flooring according to one of the 1st to 4th examples, characterized in that the pore size of the filter nonwoven sections and the nonwoven fabric is less than 75 µm and in particular less than 50 µm. Example 7: Composite flooring according to one of the 1st to 5th examples, characterized in that at least two of the multiple filter nonwoven sections have different porosities. Example 8: Composite flooring according to one of the 1st to 6th examples, characterized in that the pore size of the composite flooring, with the exception of the filter nonwoven sections and the nonwoven fabric, is greater than 0.5 mm and in particular greater than 1 mm and preferably greater than 3 mm. Example 9: Composite flooring according to one of the 1st to 7th examples.Examples, characterized in that the polymer material is based on polyurethane, epoxy, polyethylene, polypropylene, or a mixture thereof. 9th example: Road shoulder or road surface, characterized in that the road shoulder or road surface is designed as a composite floor covering according to one of the 1st to 8th examples. 10th example: Composite floor covering made of granules and polymer material, which is provided with a nonwoven fabric, characterized in that the nonwoven fabric has a pore size of no more than 100 µm. 11th example: Composite floor covering according to the 10th example, characterized in that the nonwoven fabric is arranged on the entire underside of the composite floor covering. 12th example: Composite floor covering according to the 10th or 11th example, characterized in that at least a section of the nonwoven fabric is integrated into the body formed by the composite floor covering. 13th example: Composite floor covering according to one of the 10th to 12th examples.Examples characterized in that the pore size of the nonwoven fabric is less than 75 µm and, in particular, less than 50 µm. Example 14: Composite flooring according to one of the 10th to 13th examples, characterized in that the composite flooring has several sections of the nonwoven fabric. Example 15: Composite flooring according to the 14th example, characterized in that some of the sections of the nonwoven fabric are arranged internally within the composite flooring. Example 16: Composite flooring according to the 14th or 15th example, characterized in that at least two of the several sections of the nonwoven fabric have different porosities. Example 17: Composite flooring according to one of the 10th to 16th examples, characterized in that the composite flooring is porous, wherein the pore size of the composite flooring, with the exception of the nonwoven fabric, is greater than 0.5 mm and, in particular, greater than 1 mm. Example 18: Composite flooring according to one of the 10th to 17th.Examples characterized in that the granules are mineral granules, and / or that the polymer material is based on polyurethane, epoxy, polyethylene, polypropylene, or a mixture thereof. 19th example: Road shoulder or road surface, characterized in that the road shoulder or road surface is designed as a composite pavement according to one of examples 10 to 18. REFERENCE MARK LIST

[0083] 1 Composite flooring 2 Filter fleece 3 Internal filter fleece section for coarse and fine filtration 4 Topsoil (humus) 5 Unbound base course 6 Bound base course 7 Designed as a seepage basin 8 Humus-sand mixture 9 Artificial turf football pitch 10 Dynamic layer 11 Gravel 12 Drainage pipe 13 Surface layer tennis court 14 Base course 15 Water-permeable gravel layer 16 Seepage basin 17 Cleaning device 18 Suction / pressure beam 19 Suction nozzle 20 Cleaning nozzle 21 Suction pipe 22 Filter unit 23 Suction pipe 24 Water pipe

Claims

1. road shoulder, characterized by that the road shoulder is designed as a composite floor covering (1), wherein the composite floor covering (1) is formed from granules and polymer material, which is provided with a fleece (2, 3), wherein the granules are mineral granules which are bonded to the polymer material to form a porous composite floor covering (1), and the fleece (2, 3) has a pore size of not more than 100 µm.

2. Road shoulder according to claim 1, characterized by that the fleece (2, 3) is arranged on the entire underside of the composite floor covering (1).

3. Road shoulder according to claim 1 or 2, characterized by that at least one section of the fleece (2, 3) is integrated into the body formed by the composite floor covering (1).

4. Road shoulder according to one of claims 1 to 3, characterized by thatthe pore size of the fleece (2, 3) is less than 75 µm and in particular less than 50 µm.

5. Road shoulder according to one of claims 1 to 4, characterized by that the composite floor covering (1) has several sections of the fleece (2, 3).

6. Road shoulder according to claim 5, characterized by that some of the sections (3) of the fleece (2, 3) are arranged inside the composite floor covering (1).

7. Road shoulder according to claim 5 or 6, characterized by that at least two of the plurality of sections of the fleece (2, 3) are formed with different porosity.

8. Road shoulder according to one of claims 1 to 7, characterized by that the pore size of the composite floor covering (1) with the exception of the fleece (2, 3) is greater than 0.5 mm and in particular greater than 1 mm.

9. Road shoulder according to one of claims 1 to 8, characterized by thata minimum pore size of the composite floor covering (1) with the exception of the fleece (2, 3) is in the range of 0.5 mm to 3 mm.

10. Road shoulder according to one of claims 1 to 9, characterized by that the polymer material is based on polyurethane, epoxy, polyethylene, polypropylene or a mixture thereof.

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