Water-Permeable Paving and Method for Producing a Paving

Abstract

The invention relates to a water-permeable paving ( 1 ), for application on a ground. The upper part ( 6 ) of the paving ( 1 ) comprises a combination of compacted mineral aggregate and organic adhesives. Said paving ( 1 ) has a multilayered structure with an upper part ( 6 ) and a lower part ( 2 ), whereby the lowerpart ( 2 ) comprises at least one layer of sand ( 4 ) on the side of the ground and one layer of gravel ( 5 ) on the side of the upper part, the average size k Schotter of the fine particles being 5 mm. The invention also relates to a method for producing said paving.

1 . Water-permeable ground covering ( 1 ) for application to a substratum, wherein the superstructure ( 6 ) of the ground covering ( 1 ) is a combination of compacted, mineral aggregates and organic binding materials, characterised in that the ground covering ( 1 ) has a multi-layered structure with a superstructure and a substructure ( 6  and  2  respectively), with the substructure ( 2 ) having at least one layer of sand ( 4 ) on the substratum side and a layer of ballast ( 5 ) on the superstructure side, the average size k ballast  of the undersize particles of which amounts to 5 mm or more.  
   
   
       2 . Ground covering according to  claim 1 , characterised in that layers of the superstructure and/or of the substructure ( 6  and  2  respectively) are connected together by bonding.  
   
   
       3 . Ground covering according to one of the preceding claims, characterised in that the granulation of the aggregates k z  amounts to 1 to 7 mm.  
   
   
       4 . Ground covering according to one of the preceding claims, characterised in that the average layer thickness d o  of the superstructure ( 6 ) amounts to 30 to 60 mm.  
   
   
       5 . Ground covering according to one of the preceding claims, characterised in that the voidage of the superstructure ( 6 ) amounts to up to 45%.  
   
   
       6 . Ground covering according to one of the preceding claims, characterised in that the mineral aggregates comprise a selection of quartzite, granite, basalt and quartz.  
   
   
       7 . Ground covering according to one of the preceding claims, characterised in that the mineral aggregates have a narrow grain-size distribution, with the average size d k  of the grain amounting to a range between 1 to 3 mm, 2 to 3 mm, 2 to 4 mm, 2 to 5 mm or 3 to 7 mm.  
   
   
       8 . Ground covering according to one of the preceding claims, characterised in that the mineral aggregates have a mixture of round grain and at least a proportion of 20% angular grain.  
   
   
       9 . Ground covering according to one of the preceding claims, characterised in that the binding material is a two-component epoxy resin binding material or a one-component polyurethane binding material or a two-component polyurethane binding material.  
   
   
       10 . Ground covering according to one of the preceding claims, characterised in that a proportion of the aggregates of the superstructure ( 6 ) are coloured and the proportion preferably consists of quartz sand.  
   
   
       11 . Ground covering according to one of the preceding claims, characterised in that the average layer thickness d sand  of the compacted layer of sand ( 4 ) amount to at least 20 mm.  
   
   
       12 . Ground covering according to one of the preceding claims, characterised in that the layer of ballast ( 5 ) has undersize particles, whose average size k uballast  amounts to 5 mm or more.  
   
   
       13 . Ground covering according to one of the preceding claims, characterised in that the average grain size k ballast  of the ballast ( 5 ) lies in a range between 5 to 16 mm, 16 to 22 mm or 16 to 32 mm.  
   
   
       14 . Ground covering according to one of the preceding claims, characterised in that the average layer thickness d s  of the layer of ballast ( 5 ) amounts to 400 to 500 mm.  
   
   
       15 . Method for producing a ground covering according to one of the preceding claims, characterised by the following method steps: 
 application of a still deformable mixture of binding material and sand to the substratum ( 3 ),    compacting of the binding-material/sand mixture,    application of a still deformable mixture of binding material and ballast ( 5 ) to the layer of sand ( 4 ),    application of the upper layer consisting of a still deformable mixture of aggregates and binding material to the layer applied last,    compacting of the still deformable mixture, and    hardening of the layers.    
   
   
       16 . Method according to  claim 15 , characterised in that the superstructure ( 6 ) is applied to the substructure ( 2 ) even before the layer of the substructure ( 2 ) on the superstructure side has completely hardened.  
   
   
       17 . Method according to  claim 15  or  16 , characterised in that a layer of sand ( 4 ) is applied after the layer of ballast ( 5 ) has been applied.  
   
   
       18 . Method according to one of the  claims 15  to  17 , characterised in that before the layer of ballast ( 5 ) is applied to the layer of sand ( 4 ), a layer of binding material is applied to the layer of sand, for example by spraying.  
   
   
       19 . Method according to one of the  claims 15  to  18 , characterised in that before the superstructure ( 6 ) is applied to the layer of ballast ( 5 ), a layer of binding material is applied to the layer of ballast ( 5 ), for example by spraying.  
   
   
       20 . Method according to  claim 18  or  19 , characterised in that the depth of penetration t of the layer of binding material amounts to at least 150 mm.