Foreign ground item with wedge-shaped reinforcement in the boundary region

Abstract

A sub-base element ( 1 ), for example a shower tray base element, for designing a floor-level overall system. An essential component of such sub-base elements is generally a carrier element made of a rigid foam core, which has lower pressure resistance than the floor region surrounding the sub-base element. If the surrounding floor region and the sub-base element are not directly covered with a load-distributing and deformation-rigid layer, such as a covering made of floor tiles, but rather, for example, with a flexible covering, such as PVC, the rim zone of the carrier element constitutes a problem region. Notably with loads that are introduced in substantially punctiform manner, such as when passing over the edge with a wheel chair wheel, for example, frequent load changes in the edge region of the carrier element can result in mortar spalling beneath the flexible covering and in permanent deformation of the carrier element.

1 . A sub-base element ( 1 ), for example a shower tray base element, for designing an overall floor-level system, the sub-base element ( 1 ) either being inserted in a depression ( 6 ) compatible therewith within a floor covering ( 8 ) having high pressure resistance, or the sub-base element being first placed on an unfinished floor ( 7 ) and the floor covering ( 8 ) having high pressure resistance, such as a floor pavement, then being applied adjoining the sub-base element, and the sub-base element having a layer structure as follows: a core layer ( 2 ) made of plastic foam, the pressure resistance of which is lower than that of the floor covering ( 8 ); a water-resistant transition layer ( 24 ), which is glued to the core layer ( 2 ) and comprises an adhesive layer containing a textile strengthening structure such as a non-woven fabric, a woven fabric or a laid scrim ( 3 ); and a highly pressure-resistant mortar layer ( 4 ) as the cover layer on the transition layer ( 24 ), the mortar layer being planar at the top or having a gradient, characterized in that the core layer ( 2 ), together with the transition layer ( 24 ) located thereon, is provided with at least one graduation ( 25 ), on at least one outside edge length (L A ), and/or on at least one inside edge length (L I ) of the sub-base element ( 1 ), and the mortar layer ( 4 ), which is planar at the top or has a gradient, is thickened in the region of the graduation ( 25 ) so that there is no significant difference in pressure resistance, or deformation resistance, between the surrounding floor covering ( 8 ) and the sub-base element ( 1 ). 
     
     
         2 . The sub-base element ( 1 ) according to  claim 1 , characterized in that the boundary region of the graduation ( 25 ) is made of the compacted material of the core layer ( 2 ). 
     
     
         3 . The sub-base element ( 1 ) according to  claim 2 , characterized in that the core layer ( 2 ), together with the transition layer ( 24 ) located thereon, on at least one outside edge length (L A ), and/or inside edge length (L I ) of the sub-base element ( 1 ), comprises an outwardly directed, wedge-shaped bevel ( 17 ;  19 ) instead of one or more graduations ( 25 ), and the mortar layer ( 4 ), which is planar at the top or has a gradient, is thickened in the region of the bevel ( 17 ;  19 ). 
     
     
         4 . The sub-base element ( 1 ) according to  claim 3 , characterized in that the angle of slope of the bevel ( 17 ) ranges between 10 and 45°. 
     
     
         5 . The sub-base element ( 1 ) according to  claim 1 , characterized in that the entire periphery of the sub-base element ( 1 ) is provided with one or more graduations ( 25 ), and therefore with a rim-side mortar thickening. 
     
     
         6 . The sub-base element ( 1 ) according to  claim 3 , characterized in that the entire periphery of the sub-base element ( 1 ) is provided with a bevel ( 17 ;  19 ), and therefore with a wedge-shaped, rim-side mortar thickening. 
     
     
         7 . The sub-base element ( 1 ) according to  claim 1 , characterized in that a load-bearing reinforcement ( 20 ) is introduced in the mortar layer ( 4 ) in the region of the graduation ( 25 ). 
     
     
         8 . The sub-base element ( 1 ) according to  claim 7 , characterized in that the reinforcement ( 20 ) is a mat or a material strip arranged in bundle form. 
     
     
         9 . The sub-base element ( 1 ) according to  claim 7 , characterized in that the reinforcement ( 20 ) is a plastic or metal rail. 
     
     
         10 . The sub-base element ( 1 ) according to  claim 9 , characterized in that the plastic or metal rail is cut to size from an angle section ( 27 ). 
     
     
         11 . A kit, comprising a sub-base element ( 1 ), for example a shower tray base element, for insertion into a depression ( 6 ) that is compatible with the sub-base element, in a flooring level ( 26 ) having a high pressure resistance floor covering ( 8 ) surrounding the depression ( 6 ), wherein the sub-base element ( 1 ) has a layer structure as follows: a core layer ( 2 ) made of plastic foam, the pressure resistance of which is lower than that of the aforementioned floor covering ( 8 ); a water-resistant transition layer ( 24 ), which is glued to the core layer ( 2 ), wherein the core layer ( 2 ), together with the transition layer ( 24 ) located thereon is graduated or beveled toward the outside, on at least one edge length (L) of the sub-base element ( 1 ); and a packaged mortar substance for mixing, which is to be applied on-site to the core and transition layers ( 2 ;  24 ) as mortar paste, and which results in a highly pressure-resistant mortar layer ( 4 ), which is planar at the top or has a gradient, as the cover layer on the transition layer ( 24 ), a mortar layer ( 24 ) being obtained in the region of the graduation that is thickened in a wedge shape, so as to preclude an excessive difference in pressure resistance between the flooring level ( 26 ) and the sub-base element ( 1 ). 
     
     
         12 . The sub-base element ( 1 ) according to  claim 6 , characterized in that a load-bearing reinforcement ( 20 ) is introduced in the mortar layer ( 4 ) in the region of the bevel ( 17 ); ( 19 ).