Pad for building slabs

Abstract

The object of the invention is a pad (1) for building slabs (9), intended for connection with a plurality of pads (1) when making a base subfloor from pads (1) connected together, advantageously in a form connection, for building slabs when laying them, characterized in that it is adjusted to accommodate and secure an additional filling element (2, 2a, 2b, 2c) forming a grout on its upper surface, in such a way that it is provided with socket forming elements (5, 5a, 5b, 5c) constituting the recesses, adjusted to accommodate the grout forming filling element (2, 2a, 2b, 2c) and extending in a straight line from the centre of the edge of each pad (1) towards its geometric centre, and that furthermore each section (1a, 1b, 1c and 1d) of the pad (1) is provided with at least a two-stage, double catching system in the form of a two-stage catch for creating a form-friction connection between the pads (1) laid next to each other, which two-stage catch consists of protrusions (4) arranged along the outer edge of each section (1a, 1b, 1c, 1d) of the pad and protruding outwards from the edge of the pad (1), and pockets (3) adjusted by shape and directly adjacent to them in the form of cut-outs extending inwards in relation to the outer edge of each section (1a, 1b, 1c, 1d) of the pad, and each protrusion (4) is preferably in the shape of a polygon, which has an outer first major base (4a) of greater length than a first minor base (4b) parallel thereto, located inwards in relation to the first major base (4a), wherein the first minor base (4b) of the protrusion is flush with the second major base (4c) of the protrusion and constitutes a partial section of said second major base (4c) of the protrusion, and wherein said second major base (4c) of the protrusion is of greater length than the length of the first major base (4a) of the protrusion protruding outwards in relation thereto.

Description

[0001] Pad for building slabs

[0002] Field of the Invention

[0003] The object of the invention is a pad for building slabs, in particular building slabs for making base subfloors when laying floors, balconies, terraces, driveways, and similar surface claddings, wherein building slabs may comprise, for example, stoneware, clinker, concrete, reinforced concrete, stone, rubber slabs, or slabs made of plastic or wood or wood-based materials, and other cladding slabs.

[0004] The invention relates to a pad for building slabs for making a base subfloor from pads connected together by form connection with the use of a cooperating separate filling element adjusted to the pads and connected thereto, preferably in the form of a tape, for making a grout between building slabs laid on the base subfloors.

[0005] In particular, the pad is adjusted to accommodate a separate, matching grout-forming filling element, wherein the pad for building slabs and the matching grout-forming filling element advantageously form a set for the manufacture of a base subfloor for the laying of floors and carpets, especially so-called "floating" floors, from building slabs, which are suitable for removal without damaging to the floor and possible re-installation, even in another location.

[0006] In its entirety, both the pad and the filling element that make up the pad / filling element set for grouting or the grout element are made of recycled material, usually rubber.

[0007] Prior art

[0008] The pads for slabs are known to be laid as floor coverings, indoors as well as outdoors floors, for example for laying terrace or balcony surfaces using adhesive or appropriate mortar. The most commonly used pads are made as rubber or plastic elements and are sized to allow small comer regions of the slabs to be laid on them where directly adjacent slabs are joined together. These types of pads serve to facilitate the floor builder's ability to precisely determine the position of the slabs when laying them at the joint. For this purpose, the pads are provided with protrusions to mark the position of the corners of the slabs to be joined and grout slots, as well as recesses and holes to contain the adhesive or mortar fixing the slabs and channels for water drainage.

[0009] However, such pads for building slabs do not provide reliable support for the installed slabs over their entire surface and can also have different shapes, for example round, square, octagonal, or others, and can be made as solid or grid elements, which additionally support water drainage.

[0010] These types of pads are disclosed, for example, in patent publications DE 19819468, DE 20005249, WO 03040491 or DE 20009717U1.

[0011] These types of pads do not ensure the stabilization of the entire building slab during installation and use or the even transfer of stresses exerted on the slab, they require the use of glue or mortar to make the flooring, and in addition, in the event of damage to the slab or the need to replace the flooring, this can only be done by damaging the existing floor covering.

[0012] There are also known pads for building slabs, which have been described in patent publication No. P.440398, which constitutes the closest prior art to the pad according to the present application. The known pads are in the shape of a square plate, on the upper surface of which are arranged four linear protrusions extending from the centre of each edge to the geometrical centre of the pad, which form a grout between the building slabs laid on the pad, and are spacers dividing the pad into four identical sections, on which the four converging building slabs are laid respectively at the comers. On one side edge of each section there is a centrally located protrusion with a base narrower than the rest of the protrusion, and on the other side edge of each section there is a recess in the form of pocket, corresponding to the shape of the protrusion, wherein there is a protrusion and a pocket on each side edge of the pad. The upper surface of the pad is provided with linear grooves extending from the corners of the pad and converging in the centre thereof, and each section of the pad is provided with an opening, preferably a central circular opening. The underside of the pad is provided with four linear bottom recesses extending from the centre of each edge to the centre of the adjacent edge, which form a square-shaped outline. The protrusions and pockets on each section of the pad have corresponding trapezoidal, triangular, or circular shapes, wherein during installation, the system of protrusions and pockets of adjacent pads is connected, creating a stable surface supporting the entire surface of the laid slabs. The pads are placed on a level, stable base and connected to each other using a system of pockets and protrusions, and the protruding linear protrusions on the upper surface of the pad fill the spaces between the connected slabs, creating a grout in such a manner that additional traditional grouting of the laid floor is no longer required. The pad is made of rubber material bonded with polymer glue in sizes adjusted in each case to the size of the plates to be laid, and the linear protrusions should be adjusted in height to the thickness of the slabs to be laid. The openings on the upper and lower surfaces of the slab, together with the system of linear recesses connected to them, create a drainage system for water removal.

[0013] The known solution of a pad for building slabs made in one piece with a linear protrusion creating a grout and a system for joining pads by means of protrusions and pockets as described above constitutes a significant improvement in the laying of building slabs and the making of floorings, e.g. terraces, residential or public utility rooms, driveways, etc.; however, its use is associated with inconveniences and limitations of the possibilities of wide use of this solution.

[0014] The main problem of this known solution is that the system used for joining pads, i.e. a form connection with a single pocket and a single protrusion on the edge of each pad section that are matched to each other in shape and dimensions, shows an instability of the joint when joining pad elements and their uncontrolled disconnection under load. According to this design, there is a single 4 cm high joint with only one level of connecting, which does not provide a permanent joint between the pads, with the breaking force acting parallel to the surface of the pad. This leads to unintentional disconnection of individual adjacent pads and disruption of the stability and functionality of the entire flooring system structure.

[0015] Moreover, the permanent linear protrusion made in one piece with the pad, creating a grout between the building slabs laid on the pads and constituting a longitudinal and expansion joint that is exposed to mechanical damage during transport and use, also of the finished floor made of slabs, creates major problems, and its production is associated with high technological outlays in the process of manufacturing the pad and increases production costs.

[0016] In addition, the known pad for building slabs creates problems related to the transport and storage of pads and their stacking due to the need to protect the linear protrusion projecting above the upper surface of the pad using inserts protecting these protruding elements against damage, e.g. styrofoam, cardboard inserts, etc., which requires a lot of storage and transport space.

[0017] In addition, the known system proved to be too inflexible in its application because the pads can only be used for a specific thickness and dimension of building slabs laid on the subfloor surface formed by the combined pads for the building slabs, and the slabs can only be laid within a region limited by linear protrusions on four sides. According to the state of the art, the pad is only suitable for supporting and laying one size of building slabs with a specified length, width, and thickness, and it is not possible to lay any other dimensional variants of the slabs, even in terms of their thickness, or to adapt the colour of the grout to the colour of the slabs being laid.

[0018] Additionally, the element creating the grout, i.e. the linear protrusion, is made of the same material as the rest of the pad, i.e. the same colour and with the same density and elasticity, so it is not possible to adjust the grout filling to the thickness and colour of the flooring or to the greater load of the flooring laid on pads for building slabs.

[0019] It is not possible to change the type of grout filling material or its physical and mechanical parameters in relation to the pad material in order to achieve better material "self-locking" of the joint between the base surface and the laid building slabs, which results in unstable foundation of the slabs and leakage in the joint between them.

[0020] Moreover, if the element creating the grout is damaged during use or installation, which happens relatively often and leads to the need to replace the grout, it is necessary to replace the entire pad together with the grout, and the adjacent slabs must be dismantled, which causes high service costs.

[0021] Object of the invention

[0022] Accordingly, the object of the invention is to provide an improved pad for building slabs for laying flooring on indoor and outdoor surfaces, such as, for example, surfaces of terraces, balconies, driveways, and / or indoors, which would provide a stable and spreading-protected base subfloor and an improved joint of the pads to each other, which solves the aforementioned technical problems of the known solution and does not exhibit its disadvantages. Building slab surfaces, e.g. terraces and / or rooms, laid out using the solution according to the invention are mobile, which means that they can be dismantled without damaging the elements and re-laid with the same elements in a different or the same location.

[0023] The object of the invention has been achieved by using a new design of pads, adjusted to be interconnected with each other by means of a two-stage catching system. Part of the improved invention is a separate, additional filling element that acts as a grout. This grout is adjusted to the pad and to the building slabs laid on the pad, and the pad is adjusted to accommodate and immobilize an additional filling element.

[0024] Description of the essence of the invention and the solution to the technical problem

[0025] The essence of the invention relates to a pad for building slabs, intended for joining to plurality of pads when making a base subfloors from pads for building slabs joined together by a form connection when laying them, which pad has the shape of a polygon with an outline close to a tetragonal one, wherein each edge of the pad is provided with a protrusion and a pocket adjusted in shape to it for connecting the pads to each other, and upper surface of the pad is provided with a through hole, positioned on each of the four identical sections of the upper surface of the pad, which through hole on the lower bottom side of the pad is connected to a system of drainage channels for draining water, wherein the through hole together with the system of drainage channels formed on the bottom side of the pad forms a drainage system of the pad, which according to the invention is characterised in that it is adjusted to accommodate and secure an additional filling element forming a grout on its upper surface in such a way that it is provided with socket forming elements, adjusted to accommodate a filling element forming a grout and extending in a straight line from the centre of the edges of each pad towards its geometric centre, which converge at said geometric centre of the pad at right angles, preferably in the shape of a cross, dividing the pad into four identical sections, wherein the grout forming filling element is in the form of a longitudinal grout tape and comprises at least two longitudinal sections of the grout tape, and the socket forming elements have a shape and dimensions adjusted to the shape and dimensions of the corresponding filling element. In addition, according to the invention, each section of the pad is provided with at least a two-stage, double catching system in the form of a two-stage catch for creating a form-friction connection between the pads laid next to each other, connected to each other to form a base subfloor for building slabs, which two-stage catch consists of protrusions arranged along the outer edge of each section of the pad, projecting outward from the edge of the pad, and pockets in the form of cut-outs adjusted thereto and directly adjacent thereto, extending inwardly in respect to the outer edge of each section of the pad, wherein each protrusion is preferably in the form of a polygon, which has an outer first major base of greater length than a first minor base parallel thereto, positioned inwardly in relation to the first major base, wherein the first minor base of the protrusion is flush with the second major base of the protrusion and constitutes a partial section of said second major base of the protrusion, and wherein said second major base of the protrusion is of greater length than the length of the first major base of the protrusion projecting outwardly in relation thereto.

[0026] In an embodiment of the invention, in each protrusion having a polygonal shape with an outer first major base having a length greater than the length of the first minor base parallel thereto, located inwardly in relation to the first major base, the first minor base is connected to the first major base by means of sides of the protrusion extending from its ends at an angle a, falling within 40 to 70°, and advantageously within 50 to 600thereto, wherein the second major base of the protrusion being in contact with and flush with the first minor base of the pocket, which is also polygonal, located at the outer edge of each section of the pad, directly adjacent to the second major base of the protrusion, wherein the first minor base of the pocket being connected in turn by its ends through the inclined sides of the pocket, extending at an angle P of between 40 and 70 °, and preferably between 50 and 60 °, in relation to the first minor base of the pocket, with the second major base of the pocket parallel thereto, located inwardly in relation to the outer edge of the pad.

[0027] In accordance with an embodiment of the invention, at least one protrusion and at least one adjacent pocket are provided along each outer edge of each section of the pad, and at least two protrusions and at least two adjacent pockets are provided along the length of each edge of the pad.

[0028] According to a further embodiment of the invention, a two-stage catching system, used in connecting the pads to each other to form a base subfloor for building slabs, consists of at least two catch stages, a first and a second, wherein the first catch stage being defined and formed between the first major base of the protrusion and the first minor base of the protrusion, along the a-angled inclined connecting sides, on both sides of the protrusion and having two connection locking points each on both sides of the protrusion, while the second catch stage is formed between the second major base of the protrusion and the first major base of the pocket, on both sides of the pocket along the P-angled sides that connect the ends of the first major base of the pocket to the ends of the second major base of the protrusion, and has two connection locking points on both sides of the pocket each, and wherein the second catch stage acts as an additional reinforcement for the first catch stage, advantageously increasing, at least twice, the force required to break the connection between the pads.

[0029] According to another embodiment of the invention, a two-stage catch of the pad consisting of at least two protrusions and two pocket on each side edge of the pad has a more developed connection line length by about 40 to 45% in relation to the side length of the pad and an increased friction force between the connected pads in proportion to the development of the connection line length when making a base subfloor for building slabs, and thus the connection force of the pads is increased within the same percentage limits by about 40 to 45%, which is proportional to the contact surface area of the connected pads.

[0030] According to another embodiment of the invention, in the socket-forming elements in the pad, extending in a straight line, the sections of the grout -forming filling element in the form of a grout tape are advantageously embedded with a lightly pressed-in connection selected from: form and form-dovetail, wherein the filling element in the form of a grout tape is adjusted in terms of the material from which it is made to the material of the pad, and the width of the filling element in the form of a grout tape is greater than the thickness of the used building slab so that in the position embedded in the socket-forming elements, the upper edge of the filling element is located preferably at least 2 mm below the upper edge of the building slab being laid.

[0031] According to another embodiment of the invention, the socket-forming elements in the pad have the form of continuous grout grooves, in the form of linear recesses, or in the form of continuous grout grooves 5c provided with stabilizing cut-outs 5d, which are arranged in the bottom of each grout groove 5c, wherein in the grout grooves there is advantageously placed, with a slightly pressed-in dovetail connection, a separate grout-forming filling element adjusted to the grout grooves in terms of dimensions and material, in the form of sections of grout tape, with a width depending on the thickness of the laid building slab and being the result of the action of: from the sum of the depth of the grout groove + the thickness of the used building slab, preferably 2 mm should be subtracted, in particular, the width of the filling element is approximately 3 mm greater than the thickness of the used building slab with a grout groove depth of preferably 5 mm.

[0032] In an embodiment of the invention, the socket forming elements are shaped as continuous grooves and additionally have, arranged inside them, along their lower surface, and positioned at intervals from each other, stabilizing cut-outs with dimensions adjusted to the grout tape adjusted thereto, preferably provided with at least dovetails, and in particular with dovetails and with groove-shaped cut-outs on at least one narrow side, wherein the stabilizing cut-outs are preferably 2 to 5 mm deep and the sum of the surface areas of all stabilizing cut-outs arranged in the grout groove is usually from 5% to 96% and preferably from 2% to 98% of the lower surface area of the continuous groove, depending on the number and dimensions of the stabilizing cut-outs arranged.

[0033] According to a further embodiment of the invention, the socket forming elements in the pad have the form of elongated, discontinuous inlet recesses, which are made in the pad and extend from the upper surface of the pad through its thickness towards the lower surface of the pad, either blind or through, in the form of recesses or inlet holes, forming grout inlets with a preferably rectangular outline, which are spaced along straight lines along the length of the pad and extend from the centre of the edge of each pad towards its geometric centre, wherein the grout inlets are adjusted to be mounted in them with a slightly pressed-in-dovetail connection of a separate, adjusted to them in terms of shape and dimensions and a material of the filling element forming a grout, which has the form of a grout tape provided on one of its narrow sides with tabs projecting outwards, arranged along the entire length of this narrow side, forming dovetails of the grout with an outline similar to elongated rectangles, which are adjusted in terms of shape, dimensions and arrangement to the grout inlets arranged on the upper surface of the pad.

[0034] According to a further embodiment of the invention, in the pad, a separate grout-forming filling element in the form of a grout tape is provided with groove-shaped cut-outs extending from the edge of one of the narrow sides of the grout tape, which are spaced apart each other along the entire length of the tape, wherein the depth of the groove-shaped cut-outs is from 40% to 60% of the width of the grout tape constituting the filling element, and the spacing between adjacent groove-shaped cut-outs, measured between their centres of symmetry, is adjusted to the dimensions of the side of the building slabs being laid and is preferably the sum of the length of the side of the building slab being laid and the thickness of the groutforming filling element in the form of a grout tape, and wherein the centre of symmetry of the first groove-shaped cut-out, viewed from the beginning of the tape, is spaced from the edge of the beginning of the tape by a distance equal to the sum of the length of the side of the building slab being laid, for which the pad is intended, and half the thickness of the grout tape.

[0035] According to another embodiment of the invention, in the pad, a separate grout-forming filling element in the form of a grout tape has groove-like cut-outs arranged on the same narrow side as the tabs forming the dovetails and / or has groove-like cut-outs arranged on the narrow side opposite the tabs forming the dovetails.

[0036] According to a further embodiment of the invention, reinforced fastening of the grout-forming filling element in the form of a grout tape in the socket -forming elements in the pad, both in the form of a continuous groove for the grout and grout inlets, is achieved by using appropriate parameters of materials, preferably recycled and containing rubber, such as: a) the friction factor between the pad material and the grout tape material within the range of 1.07-1.2 n / n and b) the density of the material, wherein the ratio of the density of the material of the groutforming filling element and the material of the pad is preferably between 0.85 and 0.95, i.e. in each case the percentage difference in density between the material of the grout-forming filling element placed in the groove for the grout of a pad or in the grout groove and the material of the pad is not less than 10% and is usually from 10% to 15% less than the density of the material of the pad.

[0037] According to a further embodiment of the invention, a through hole in the pad located on each section of the pad on the lower bottom side is connected to underside drainage channels arranged on the underside of the pad, which channels are formed as selected from:

[0038] - drainage channels in the form of grooves extending from the centre of the edge of one side of the underside of the pad and connecting with the centre of the edge of the adjacent side of the underside of the pad by passing through and connecting with the through hole; and / or

[0039] - drainage channels in the form of transverse and / or longitudinal and / or diagonal grooves arranged on the underside of the pad, connected to each other at the intersection points to form a kind of grid; and / or

[0040] - drainage channels formed between spacer elements protruding downwards and spaced apart over the entire underside of the pad in the shape of any geometric figures, preferably polyhedral, rotary, or non-rotary; and / or

[0041] - a corrugating system of elongated, curvilinear, or broken curve shape with a depth of not less than 5% in relation to the total thickness of the pad, preferably up to about 2 mm;

[0042] According to a further embodiment of the invention, grooves are arranged on the upper surface of the pad, preferably connecting the edge of each of its corners with its geometric centre, and each groove extends through and is connected to a through hole arranged on each of four identical sections of the upper surface of the pad, wherein the through hole, together with the grooves of the upper surface of the pad and the drainage channels formed on the underside of the pad, forms a drainage system of the pad.

[0043] According to a further embodiment of the invention, the pad is additionally provided with a culvert channel in the form of culvert grooves for conducting wiring, wherein the culvert channel is formed on the lower, underside of the pad and is in the form of culvert grooves, in particular extending perpendicularly to each other from the centres of the edges of the pad to its geometric centre, converging approximately at a right angle, forming the outline of a cross.

[0044] The beneficial effects of the invention

[0045] A beneficial effect of the solution according to the invention is that the pads and filling elements for making a grout or forming a grout according to the invention are manufactured from recycled material, namely from rubber granulate obtained in the process of recycling tires and other rubber products, including industrial and utility products, as well as rubber pads and plates made from recycled rubber-containing material. The pads and grout forming filling elements can be fully recycled and reused. In a preferred embodiment of the invention, the filling or grout elements can also be made of EPDM material, which can be coloured, or of other suitable known materials, preferably containing silicone.

[0046] Thanks to the applied construction of connecting the pads according to the invention, which form a base subfloor for building slabs, using a two-stage catching system with double engagement of the "double puzzle" type, hereinafter referred to as the two-stage catch, a solution has been provided to the problem of increasing the strength of the connection of pads under load and securing the connected pads and the slabs placed on them against sliding apart. The constructed base subfloor and, consequently, the floor made of building slabs laid on it were also highly stable in relation to the known solution. In the known solution according to patent P. 440398, a single connection of the pads was used, which did not ensure a permanent connection between the pads. The system of connecting pads with a "double two-stage catch", modified according to the invention, for example, with a height of 80 mm, and improved shape of the pocket and protrusion (tongue) provides an increased contact surface area of both elements when connecting pads. Two connection levels are provided, which reinforce each other and at the same time in the connection and ensure that pads adheres tightly to each other in the installed system, and thus allows for the proper installation of the additional grout forming filling element. When the full Easy Drop system is installed (including the pads and the building slab), there is a friction force that can act horizontally on the building slab, causing it to possibly shift. In the modified two-stage catch design according to the invention, i.e. the double catch option, this force will not break the connection between the pads forming the base subfloor, while stabilizing the slab and the entire installed system.

[0047] Furthermore, the need for additional operations and equipment or tools for sealing the joint between the grout-forming elements and the laid building slabs is eliminated, thanks to the replacement of permanently bonded to the pad grout in the form of a linear protrusion forming a longitudinal-dilatation joint by a separate grout-forming filling element according to the invention.

[0048] The use of socket elements in the pad in the form of continuous linear grooves or discontinuous grout inlets arranged in a line at intervals from each other for accommodating an additional grout-forming filling element improved the fluid-tightness of the joint between the grout and the laid building slabs. Additionally, the solution according to the invention enables the appropriate selection of physicochemical parameters of materials, especially in terms of density, hardness, and friction coefficients, of cooperating elements, i.e. the pad and the filling element creating the grout. This additionally improves, through the high coefficient of friction between the rubber-containing elements of the system, i.e. the pad and the filling element, the strength of their interconnection in the region of the socket element for the grout, the resistance of the connected pads to the effects of higher loads and grout slipping, and eliminates the effect of keying of the connected pads under the load exerted on the building slabs laid on them.

[0049] The use of socket elements according to the invention in the form of linear grooves forming a channel and, alternatively, in the form of discontinuous grout inlets for additional attached filling elements for making the grout, has reduced the costs of manufacturing both elements in separate, technologically simple, cheaper processes and has simplified the assembly of building slabs on a laid base subfloor made of connected pads, the connection of which is reinforced and not susceptible to spreading. The invention assumes the use of a separate filling element in the form of a grout tape, in particular a rubber tape and a grout made therefrom, which is inserted first into the parallel -positioned grooves or adjacent grout inlets, forming a continuous line connected by protrusions and pockets of pads, which may not be shorter than the side length of at least two, and advantageously more, pads, which will further ensure the form-friction connection of the joined pads. Then, according to the invention, another section of filling material in the form of a grout tape is placed in the perpendicular grout grooves, forming a continuous line, which in the embodiments may have a length corresponding to at least the length of the side of the building slab being laid, and preferably a multiple of this length, wherein the laid sections of filling material are cut to the appropriate size. In the regions limited by the laid filling material in the form of grout tape, building slabs are laid.

[0050] Transport and storage of the pads and separate filling elements according to the invention are also cheaper and simpler and require less space, because no additional fillings, e.g. polystyrene inserts or other protection, are required when stacking, and the risk of damage to the grout, which occurs in the case of the known fixed grout connected to the pad, is eliminated. In addition, it is possible to stock pads in one colour and several different sizes, as well as many colour and size variations of separate filling elements for producing grouts, which increases the flexibility of using the pads according to the invention. The grout-forming filling elements, according to the invention, can be manufactured from various materials and flexibly matched to the colour and thickness of the building slabs laid on the pads and adjusted to specific requirements.

[0051] Additionally, the pads in the embodiment of the invention comprise a system of passages made on the lower side in the form of grooves forming a channel enabling the passage of cabling installations under the flooring, for example, electric, telephone, and fiber-optic cables for equipment of rooms and terraces.

[0052] The solution of the pad according to the invention designed to be combined with other pads and to lay a base subfloor and adjusted to accommodate a separate filling element for the formation of the grout, in all the embodiments described hereafter, provides for the creation of a flooring of any building slabs on these combined pads in a "floating" technology in a simple manner, with the possibility of dismantling it without damaging the pads, the grout and the building slabs and its reconstruction in a different place and with a facilitated method of repairing damage. Additionally, the material from which the filling element is made has EFL fire resistance class, and in the EPDM version, CFL fire resistance class, which ensures appropriate / favourable fire resistance of the floor.

[0053] Description of the figures

[0054] The object of the invention is illustrated in embodiments in the drawing, in which: Fig. l is a schematic top view of a pad in a preferred embodiment according to the invention, fig. 2 is a side elevation view of the pad of fig. 1, fig. 2a is a schematic view of detail A of fig. 2. fig. 3 is a schematic bottom view of an embodiment of a pad of fig. 1 according to the invention, fig. 4 is a schematic top view of the laid pads according to an embodiment of the invention connected and immobilized to each other by means of a two-stage catch and forming a base subfloor for building slabs with a building slab laid on this base subfloor. fig. 5 is a view of cross-section A-A indicated in fig. 4, fig. 5b - cross-sectional view of detail B indicated in fig. 5, fig. 6 is a perspective front view of the pad in the embodiment according to the invention, showing the grout groove, fig. 7 is a perspective top view of the pads laid and connected to each other by a catching system according to fig. 6, with a building slab laid on them and a filling element creating a grout placed in the groove for the grout, fig. 7c is an enlarged detail C indicated in fig 7, fig. 8 is a schematic bottom view of the pad according to the invention in another embodiment of the invention with indicated cable passage, fig. 9 is a side elevation view of the pad in the embodiment of fig. 8 and fig. 10 is a perspective bottom view of the pad in the embodiment of fig. 8, and fig. 11 is a view of the grout-forming filling element in the second embodiment with grooveshaped cut-outs, fig. I la is a perspective view of the laid and interconnected pads forming the base subfloor with the grout forming filling element in the embodiment of fig. 11, and fig. 11b is a detail A of fig. I la showing the connection region of filling elements in the embodiment according to figs. 11 and I la, fig. 12 is a perspective top view of a pad in another embodiment according to the invention, connected to adjacent pads with shown grout inlets and a grout tape in another embodiment with shown dovetails adjusted to the grout inlets, fig. 12a is a top view of the pad in the embodiment of fig. 12, fig. 12b is a bottom view of the pad of figs. 12, 12a and fig. 12c is a side view of the pad in cross-section of fig. 12b, and fig. 13 is a perspective view of another embodiment of the pad with stabilizing cut-outs in the grout grooves and a grout tape adjusted to them, fig. 13a is a perspective view of detail A of fig. 13, and fig. 13b is a side view of the grout tape in various embodiments according to the invention, fig. 14 is an underside of the pad with underside drainage channels with protrusions in another embodiment, fig. 14a is an upper side of the pad with grout grooves and stabilizing cut-outs and fig. 14b is a view of cross-section A-A indicated in fig 14a.

[0055] Description of embodiments

[0056] The solution according to the invention, which has been presented in the embodiments in figs.

[0057] 1 - 13b and 14, relates to a pad 1 for building slabs 9 adjusted for placing in its socket elements 5, 5a, 5b, 5c a filling element 2, 2a, 2b, 2c adjusted thereto, forming a grout in the form of a grout tape 2, 2a, 2b, 2c.

[0058] In a first embodiment according to the invention, in the pad 1, the socket elements 5 provided on its upper surface are in the form of continuous grout grooves 5a, which are adjusted to a separate grout-forming filling element 2 in the form of a grout tape 2, 2a, 2b, 2c for forming a grout, shaped in accordance with the embodiments described below, wherein the pad 1 for building slabs and the grout-forming filling element 2, 2a, 2b, 2c are preferably made of a flexible material and are used, by joining the pads 1 to each other, for laying a base subfloor for building slabs 9 for covering surfaces, for example terraces or rooms or other floors, both outside and inside buildings, but they can also be made of another material suitable for this purpose. In all embodiments shown in figs. l-13b and 14, the pad 1 has an approximately tetragonal shape of the outer circumference outline, in particular an approximately square shape, and the separate filling element 2 adjusted to the pad is in the shape of a strip of grout tape 2, 2a, 2b, 2c with a shape appropriately selected for the cooperating socket element 5. In the embodiment shown in figs. 1-7, it has the shape, in particular, of a section of a grout tape

[0059] 2 made of elastic material wound onto a roll, wherein the grout tape 2, 2a, 2b, 2c serves to form grouts connected in a form -friction manner to the pad 1, between the assembled building slabs 9, and to seal and stabilize the joint of the slabs 9 to pads 1, wherein a filling element in the form of a grout tape 2a, 2b, 2c in accordance with other embodiments of the invention, described hereinafter in the description and shown by way of example in figs. 11-1 lb, 12-12a, and figs. 13-13b, also serves for this purpose.

[0060] In the preferred embodiment shown in figs. 11-1 lb, the filling element 2 in the form of a grout tape 2a is provided with groove-shaped cut-outs 2d on the side of one narrow side which, in the installed state of the grout, faces upwards, i.e. towards the building slab 9, or downwards, i.e. towards the pad 1, in particular the grout groove 5a, wherein groove-shaped cut-outs extend inwards from the edge of its narrow side and are spaced arranged at intervals with respect to each other.

[0061] For example, for a building slab with a side of 600 mm, the groove-shaped cut-outs of the grout tape 2a, 2c forming the grout have the shape of a rectangle with dimensions of 6 mm (base) and 11 mm in height. In both cases the dimensional tolerance is 1 mm. The grooves are positioned at one narrow side of the grout tape 2b. The centre of symmetry of the first grooved cut-out is always positioned 603 mm from the edge of the tape at its edge (within a tolerance of 2 mm). Each subsequent centre of symmetry of the groove-shaped cut-out will be placed 606 mm from the centre of symmetry of the first groove-shaped cut-out 2d (within 1 mm tolerance).

[0062] The dimensional proportions of the groove-shaped cut-out height to the total width of the grout tape are approximately 50% (tolerance + / -10%)

[0063] The depth of the groove-shaped cut-outs 2d is from 40% to 60% of the width of the grout tape 2a constituting the filling element, preferably 50%, and the spacing between adjacent grooveshaped cut-outs 2d, measured between their centres of symmetry, is adjusted to the dimensions of the side of the building slabs 9 being laid and constitutes preferably the sum of the length of the side of the building slab 9 being laid and the thickness of the grout-forming filling element 2a in the form of a grout tape, and wherein the centre of symmetry of the first groove-shaped cut-out 2d, viewed from the beginning of the tape, is spaced from the peripheral edge of the beginning of the tape by a distance equal to the sum of the length of the side of the building slab 9 being laid for which the pad is intended and half the thickness of the grout tape 2a.

[0064] For the embodiment of the grout tape 2a, the thickness of which is 6 mm and has a total width of approximately 23 mm, assuming that the building slab 9 is 20 mm thick, the groove-shaped cut-out may be 6 mm wide and 11 mm high. However, assuming that the building slab laid has the shape of a square with sides of 600 mm, the centre of symmetry of the first grooveshaped cut-out 2d from the beginning of the tape is located at a distance of 603 mm from the peripheral edge of the beginning of the grout tape 5a, while subsequent groove-shaped cutouts 2d are spaced at intervals of 606 mm between the centres of symmetry of adjacent groove-shaped cut-outs 2d.

[0065] The advantages of the above embodiment of the invention are as follows:

[0066] - The grout tape with groove-shaped cut-outs 2d positioned on one side of the tape enables longer sections of the filling element (grout) to be joined crosswise;

[0067] - Joining the grout tape 2b, 2c by means of groove-shaped cut-outs 2d creates a stable, uniform structure that eliminates shorter separated elements susceptible to disconnection from the entire structure and

[0068] - Joining the grout tape 2b, 2c by means of groove-shaped cut-outs 2d prevents the grout from shifting in the grooves for the grout or grout inlets of the pad 1 during use of the finished system.

[0069] - The uniform structure of the grout tape positioned in the pad 1 ensures that thermal expansion of the material from which it is made will not create gaps between the joints.

[0070] Other embodiments of the grout tape forming the filling element are described hereinafter in the description and shown in figure 13b. The grout tape 2b, for example, is provided on one of its narrow sides with protrusions arranged along its entire length, forming dovetails 2e. The grout tape 2b comprises on one narrow side or one of its edges longitudinally arranged dovetails 2e in the form of tabs in the embodiment in a preferred size of 20 mm (length), with the possible length being in the range from 5 mm to 255 mm. The dovetails are spaced at equal distances, preferably every 81 mm, and possibly in the range of 5 mm to 100 mm. The dovetails 2e, i.e. their size and arrangement, are compatible with the grout inlets 5b and / or with the stabilizing cut-outs 5d in the pad 1, so that they enable perfect assembly of the entire system (pad + grout tape).

[0071] Another embodiment comprises a grout tape 2c, which is provided on one narrow side with dovetails 2e, as described above with respect to the grout tape 2b, and at the same time with groove-shaped cut-outs, as described above with respect to the grout tape 2a, which can be arranged on both of its narrow sides, as described hereinafter.

[0072] The pad 1 has an upper top side, on which the building slabs 9 are laid and mounted, and a lower or bottom side facing the subfloor on which the floor covering / lining / flooring is laid, wherein the subfloor should be level and provided with a slight slope to allow water to drain away (drainage).

[0073] On the upper side of the pad in the embodiment of the invention shown in figs. 1-1 lb, socket elements 2 are arranged, which are formed as continuous grooves 5a for the grout, preferably extending from the centre of each edge of the pad 1 to its geometric centre, which grooves 5a converge and intersect at right angles in the geometric centre of the pad. The grooves 5a for the grout are used to accommodate, in particular with a slightly pressed-in fit ensuring tightness, a separate filling element 2 for forming a grout, hereinafter also referred to as grout 2, in particular in the form of a grout tape 2, 2a as shown for example in figs. 1-1 lb, in particular suitable sections thereof cut to length. The grout tape 2 in the embodiment shown in fig. 1-10 is in the form of a strip of tape, for example rolled into a roll, but a grout tape 2a, as shown in figs. 11-1 lb, which is provided with the groove-shaped cut-outs 2d described above, and optionally also a grout tape 2b, provided on one of its narrow sides with spaced tabs forming dovetails 2e, as shown in fig. 13b, may also be used. Alternatively, a grout tape 2c can also be used as a filling element forming a grout, which is provided with groove-shaped cut-outs 2d on one of its narrow sides and with tabs forming dovetails 2e arranged at intervals from each other on one of its narrow sides, as shown in figs. 12 and 13b, wherein in this embodiment two variants of the shape of the filling element in the form of a grout tape 2c are used, namely: the first, i.e. the so-called lower variant, in the mounted state placed with the groove-shaped cut-outs 2d facing upwards, in which the groove-shaped cut-outs 2d are arranged on the opposite narrow side of the grout tape 2c in relation to the tabs forming the dovetails 2e, and the second variant, i.e. the upper one, in which the groove-shaped cut-outs 2d are arranged on the same narrow side of the grout tape as the tabs forming the dovetails 2e, and in the installed state the groove-shaped cut-outs 2d are facing downwards in the same way as the tabs forming the dovetails 2e and flush with the groove-shaped cut-outs 2d of the grout tape 2c in the lower variant for the purpose of cross joining.

[0074] The filling element 2, 2a, 2b, 2c, referred to as the grout tape 2, is placed in the grooves 5a, 5c for the grout perpendicularly to the surface of the pad 1 and, in the exemplary embodiment of the invention, reaches to the bottom of the groove 5 for the grout, protruding from this groove upwards to a suitable height, which height is less than the thickness of the building slab 9 laid on the pad 1. According to the invention, in this embodiment, the width of the grout tape 2, 2a, 2b, 2c for making the grout depends on the thickness of the building slab 9 being laid and preferably constitutes the sum of the groove depth of about -5 mm- plus the thickness of the used building slab 9, for example 10-20 mm, minus 2 mm, i.e., for a building slab 9 with a thickness of 20 mm, the width of the grout tape 2, 2a for making the grout is about 23 mm. In the case of grout tape 2c, its width is increased by the height of the dovetails 2e. Typically, the width of the filling element 2, 2a, 2b, 2c is approximately 3 mm greater than the thickness of the used building slab 9 so that it fills the groove 5 for the grout, which is usually not less than approximately 5 mm deep and protrudes above the upper surface of the pad 1 to a height not greater than 2 mm + / - 1 mm, and preferably 2 mm less than the thickness of the used building slab 9 laid on the pad 1. In the recommended embodiment, the filling element 2, 2a, 2b, 2c protrudes above the upper surface of the pad 1 to a height of no more than 2 mm + / - 1 mm below the upper surface of the building slab 1. The thickness of the grout forming filling element 2, 2a, 2b, 2c in the preferred embodiment is about 6 mm + / - 0.3 mm, and the standard length of the grout tape 2, 2a, 2b, 2c is preferably from 603 mm to 10,000 mm.

[0075] The pad 1 and the grout forming filling element 2, 2a, 2b, and 2c are, in a preferred embodiment, made of a rubber material originating from recycled rubber products in the form of granulate, preferably an SBR granulate fraction, optionally containing a single-component polyurethane adhesive, with a size in the range of 0-5 mm. The used material of the pad 1 and the grout tape 2, 2a, 2b, 2c ensures a secure and tight seating and fastening of the grout tape in the socket element 5, 5a, 5b, and 5c, preferably in the groove 5 for the grout, even without the use of additional adhesive agents, thanks to the use of appropriate material parameters, such as the coefficient of friction between the material of the pad 1 and the grout 2 in the range of 1.07-1.2 n / n and the density of the materials of these cooperating elements. In particular, the density of the material of the pad is in the range of 650-1400 g / dm3 and the density of the material of the grout (grout tape) is in the range of 625-1200 g / m3, wherein the dependence of the density of the grout 2, 2a, 2b, 2c and the pad 1 used according to the invention is between 0.85-0.95, i.e. in each case the difference in density between the material of the grout in the form of the grout tape 2, 2a, 2b, 2c placed in the groove 5a, 5c for the grout or in the embodiment of the invention shown in figs. 12- 12c in the grout groove 5b of the pad 1 and the material of the pad 1 is not less than 10%, usually it is from 10% to 15% lower than the density of the material of the pad 1, which ensures the "self-locking" of the connection of the grout tape 2, 2a, 2b, 2c in the groove 5a, 5c and in the grout groove 5b and prevents it from falling out.

[0076] The socket elements 5 in the embodiments of the invention are arranged on the upper surface of the pad in a form selected from: continuous grooves 5a for the grout as shown in the embodiments of figs. 1-1 lb, or as shown in figs. 13a and 13b in the form of continuous grout grooves 5c provided with stabilizing cut-outs 5d, which are arranged at regular intervals as recesses, preferably with rectangular outlines, in the bottom of each groove 5c for the grout, or alternatively, the grout inlets 5b shown in figs. 12, 12a, which are spaced apart from each other along a straight line as shown in the embodiment in figs. 12-12c and are preferably in the form of elongated cut-outs, either through or blind in the pad 1, in particular with a rectangular outline.

[0077] In each case, the grout tape 2a, 2b, 2c is adjusted to the corresponding socket element 5, 5a, 5b, 5c, in particular to the continuous grooves 5a, 5c, the grout inlets 5b, and the stabilizing cut-outs 5d in terms of shape, dimensions, and arrangement of the complementary grooveshaped cut-outs 2d and / or the dovetails 2e.

[0078] In one embodiment of the invention, the socket forming elements 5, 5a, 5b, 5c are shaped as continuous grooves 5c and additionally have, arranged inside them, along their lower surface, spaced apart stabilizing cut-outs 5d with dimensions adjusted to the grout tape 2c adjusted thereto, preferably provided with at least the dovetails 2e, and in particular with the dovetails 2e and with groove-shaped cut-outs 2d on at least one narrow side, wherein the stabilizing cut-outs 5d in the continuous grooves 5c preferably have a depth of 2 to 5 mm and the sum of the surface areas of all the stabilizing cut-outs arranged in the groove 5 c for the grout usually constitutes from 5% to 96% and preferably from 2% to 98% of the lower surface area of the continuous groove 5c, depending on the number and dimensions of the arranged stabilizing cut-outs 5d.

[0079] In this embodiment, the pad 1 does not comprise the groove 5a for the grout (cross-shaped) for placing the grout tape. Instead of the groove 5a, the pad 1 is provided with rectangular holes, i.e. grout inlets 5b, in the preferred size of 20 mm in length x 6 mm in width, wherein the possible length is in the range from 5 mm to 255 mm. The grout inlets 5b are available in two variants: 1) as through-holes of the pad or 2) as blind-holes of the pad with a depth of 2 to 9 mm, preferably spaced evenly every 81 mm in a straight line. The number of these grout inlets 5b can range from 2 in one line along the entire length of one pad to 60 in one line along the entire length of one pad. The distance between the inlets 5b in the pad 1 depends on the number and size of the inlets, wherein they divide the pad into four sections, similarly to the grooves 5a, 5c for the grout in the previous embodiment.

[0080] The socket elements 5, 5a, 5b and 5c divide the upper surface of the pad 1 into four identical sections la, lb, 1c, Id, each of which is provided with a through hole 6a, which in the preferred embodiment is located centrally with respect to the centre of each section but may be located elsewhere in the section. In one embodiment of the invention, drainage grooves 6 are arranged on the upper surface of the pad, which are in fluid communication with through holes 6a for draining water.

[0081] According to other embodiments of the invention, the upper surface of the pad 1 is free from drainage grooves 6, i.e. it has no drainage grooves 6 but only the through holes 6a themselves, which extend to the underside of the pad 1, as, for example, only illustrated in fig. 12a, but such an embodiment of the invention without drainage grooves 6 can be used in all embodiments of the invention, also illustrated in figs. l-13a.

[0082] For example, the drainage grooves 6 extend on the upper surface of the pad 1 from the edge of the outer comer of each section la, lb, 1c, Id of the pad 1 to the geometric centre of the pad 1, forming, together with the through hole 6a, a drainage system of the upper surface. The drainage system of the upper surface is connected via through holes 6a to drainage channels 7, which are arranged on the underside of the pad 1. Optionally, these may be drainage grooves arranged perpendicularly to the drainage grooves 6 arranged on the upper surface of the pad 1, which, together with the through hole 6a, form a drainage system for the underside surface of the pad 1.

[0083] In other embodiments of the invention, the through hole 6a in the pad located on each section of the pad 1 on its bottom underside is connected to underside drainage channels 7 arranged on the underside of the pad, which are formed as selected from:

[0084] - in one embodiment in the form of drainage channels 7 (figs. l-7c) in the form of grooves extending from the centre of the edge of one side of the underside of the pad 1 and connecting with the centre of the edge of the adjacent side of the underside of the pad 1 by passing through and connecting with the through hole 6a;

[0085] - in another embodiment in the form of drainage channels 7 (fig. 12b) in the form of transverse and / or longitudinal and / or diagonal grooves arranged on the underside of the pad, connected to each other at the intersection points and forming a kind of grid;

[0086] - in yet another embodiment, in the form of drainage channels 7 (fig. 14), formed between spacer elements arranged at intervals from each other over the entire underside surface of the pad 1, protruding outwards from it, i.e. downwards, in the shape of any geometric solids, preferably polyhedral, rotary, or non-rotary, such as, for example: cubic, conical, cylindrical, polygonal bases, circular, oval, or ellipse-based solids;

[0087] - in yet another further embodiment, in the form of a corrugating system of elongated, curvilinear, or broken curve shape with a depth of not less than 5% in relation to the total thickness of the pad, in a preferred variant up to about 2 mm, for example, these may be corrugating in the form of grooves with a depth of 1-8 mm;

[0088] For example, the spacer elements may have a square, rectangular, rhombic, trapezoidal, oval, circular, or other base shape, distributed evenly or unevenly on the underside of the pad, wherein the recommended height of the protrusions is preferably from 1 to 8 mm;

[0089] In all embodiments of the invention of the pad 1, as shown for example in figs. 1 -13b, at least a two-stage, double-catching system in the form of a two-stage catch is arranged on each outer edge of each section la, lb, 1c, Id of the pad 1 for forming form / friction connections of the "double puzzle" type between the pads 1 laid next to each other and connected to each other to form a base subfloor for building slabs 9. This two-stage, double-catching system forming a two-stage catch consists of protrusions 4 arranged along the outer edge of each section la, lb, 1c, Id of the pad, projecting outwardly from the edge of the pad 1, and shape- matched to them and adjacent pockets 3, in the form of cut-outs extending inwardly from the outer edge of each section la, lb, 1c, Id of the pad, wherein at least one protrusion 4 and at least one pocket 3 are arranged along each outer edge of each section la, lb, 1c, Id of the pad, but a greater number of protrusions 4 and a greater number of pockets 3 can be provided, wherein the number of pockets is always equal to the number of protrusions.

[0090] Each protrusion 4 is preferably in the form of a polygon, which has an outer first major base 4a of a longer length than a first minor base 4b parallel thereto, located inwardly relative to the first major base 4a, which is connected to the first major base 4a by means of the protrusion 4 sides extending from its ends at an angle a, which is in the range of 40 to 70°, and preferably in the range of 50 to 60°, to it, wherein the first minor base 4b of the protrusion is flush with the second major base 4c of the protrusion and constitutes a partial section of said second major base 4c of the protrusion. The second major base 4c of the protrusion has in each case a length greater than the first major base 4a of the protrusion. The second major base 4c of the protrusion is in contact with and is flush with the first minor base 3c of the pocket, which also has a polygonal shape. A first minor base 3c of the pocket is located on the outer edge of each section la, lb, 1c, Id of the pad 1 and is immediately adjacent to a second major base 4c of the protrusion, said first minor base 3c of the pocket in turn being connected at its ends via inclined sides of the pocket 3 extending at an angle P within the range of 40 to 70°, and preferably within the range of 50 to 60°, with respect to the first minor base 3c of the pocket and with the parallel thereto second major base 3a of the pocket (cut-out) located inwardly with respect to the outer edge of the pad 1. In a preferred embodiment, the angles a and P may have the same or a similar angle measure, but alternatively they may be of different sizes, in which case the polygonal shape of the protrusion and / or pocket is not symmetrical.

[0091] In a preferred embodiment of the invention, the external outlines of the protrusion 4 and the pocket 3 matched to it in terms of shape have a shape similar to isosceles trapezoids placed bases one on top of the other, but they may have any other polygonal shape ensuring the implementation of the function of a double two-stage catch.

[0092] A double two-stage catch, also referred to as a two-stage catching system, in a preferred embodiment of the invention, is used when connecting pads 1 to each other to form a base subfloor for building slabs 9 and comprises at least two catch stages, the first and the second, wherein the first catch stage is defined and formed between a first major base 4a of the protrusion 4 and a first minor base 4b of the protrusion 4, along the connecting sides inclined at an angle a, on both sides of the protrusion 4. The second catching stage is formed between the second major base 4c of the protrusion and the first major base 3a of the pocket, on both sides of the pocket 3 along the sides inclined at an angle P, which connect these bases with each other, i.e. the ends of the first major base 3a of the pocket with the ends of the second major base 4c of the protrusion 4.

[0093] The construction of the connection assembly used according to the invention, described above in the form of a two-stage catch, comprising two catch stages, the first and the second, provides two places of mechanical locking of the form connection for each catch stage, and thus increases the stability and durability of the connection and the effectiveness of securing the pads 1 against moving apart in the position of their connection with each other, wherein the second catch stage acts as an additional reinforcement for the first catch stage, wherein this reinforcing effect within the meaning of the invention means that the second catch stage increases, at least twice, the force required to break the connection between the pads 1.

[0094] In addition, the structure of the two-stage catch according to the invention increases the strength and effectiveness of the frictional connection of the pads 1 when forming a base subfloor by expanding the length of the connection line and the contact surface area of the pads 1 being connected to each other, which in turn increases the friction force between the pads being connected and thus increases the connection force, which is proportional to the contact surface area of the pads being connected.

[0095] In a preferred embodiment of the invention, the length of the connection line of the pad 1 increases in the case of at least a two-stage catch by approximately 40 to 45%, and in the case of a greater number of catch stages, even up to 95% (being between 1.40-1.95 times the length of the pad edge) with a doubled number of catch stages, and preferably for two catch stages on each section la, lb, 1c, Id of the pad, it increases by between 42 and 45% and the friction connection force of the pads 1 increases proportionally thereto, i.e. also in the range of 42 to 45%.

[0096] A preferred embodiment of a two-stage double catching system, referred to as a two-stage catch, has been shown above, but it is also possible to use in the pad, according to the invention, a catching connection system having more catching stages and, accordingly, more pockets and protrusions on the side edges of the pad 1 and / or the sections la, lb, 1c, Id.

[0097] In another embodiment of the invention, for example, illustrated in figs. 12-12c, the socketforming elements 5 in the pad 1 have the form of elongated, discontinuous inlet recesses forming grout inlets 5b with a preferably rectangular outline, which are made in the pad 1 and extend from the upper surface of the pad through its thickness towards the bottom underside surface of the pad 1, according to one of the variants of the invention in a blind manner in the form of inlet recesses 5b or, according to another alternative variant of the invention, in the form of inlet holes 5b. The grout inlets 5b are arranged at intervals along straight lines along the length of the pad 1 extending from the centre of the edge of each pad 1 towards its geometric centre, wherein the grout inlets 5b are adjusted to receive in them, with a slightly pressed-in-dovetail connection, a separate, adjusted to them in terms of shape, dimensions and material, filling element forming a grout in the form of a grout tape 2b, 2c (only an embodiment of the grout tape 2c is illustrated in the figures) provided on one of its narrow sides with outwardly projecting tabs, with an outline similar to elongated rectangles, forming dovetails 2e of the grout, arranged at intervals along the entire length of this narrow side, which are adjusted in terms of shape, dimensions and arrangement to the grout inlets 5b arranged on the upper surface of the pad 1.

[0098] According to this embodiment, as shown in figs. 12-12c, a socket element is provided in the pad 1, which, instead of a continuous groove 5a for the grout in the upper surface of the pad, is formed in the form of discrete through holes arranged at intervals from each other, forming grout inlets 5b, which are arranged in a straight line extending from the centre of the edge of each side of the pad 1 to its geometric centre and divide the pad into four identical sections la, lb, 1c, and Id. According to another variant of this embodiment, the grout inlets 5b may be in the form of blind holes with a depth ranging from 2 to 9 mm. In a preferred embodiment, the grout inlets are arranged at equal intervals from each other in one line along the entire length of the slab, for example, every 81 mm, and their number may range from 2 to 60. In the embodiment, the grout inlets 5b may have, for example, a length of 20 mm and a width of approximately 6 mm (possible lengths in the range from 5 to 255 mm). The distance between the grout inlets depends on the number and size of the inlets arranged on the upper surface of the pad 1. The number, dimensions, and spacing of the grout inlets 5b of the pad 1 correspond to the number, dimensions, and spacing of the dovetails 2e on the grout tape 2b, 2c, which constitutes a complementary filling element. For example, the length of the grout tape 2b, 2c may be from 0.6 m to 30 m, and preferably about 10 m, the thickness of the grout tape 2b with the dovetail 2e is preferably 6 mm + / - 1 mm, and the width (height) including the dovetail may be from 10 to 30 mm, and preferably 24 mm + / - 1 mm. The dovetails in the grout tape 2b, 2c are compatible with the grout inlets 5b in the pad 1 and are adjusted to enter the corresponding grout inlets 5b with a form, slightly pressed-in connection.

[0099] In further embodiment, regular stabilizing cut-outs 5d are inside the grout groove 5c, preferably with a depth of 2 to 5 mm, in which the dovetails 2e of an appropriately matched shape are arranged to create a stable inlet connection in the groove 2c for the grout. This type of connection prevents the grout tape from moving in the groove for the grout in the pad 1 and increases its resistance to deformation caused by thermal expansion of the material from which it is made during the use of the installed Easy Drop system. The number of stabilizing cut-outs 5d depends on their size, so that the total sum of all cut-outs in the grout channel constitutes 2-98% and preferably 5-96% of the total surface area of the groove for the grout.

[0100] With the new system of connecting the grout tape 2c with the pad 1, the grout has been modified. Currently, it is available in the form of a recycled rubber tape 2c with positioned dovetails 2e adjusted to the stabilizing cut-outs 5d in the groove 5c of the pad 1. The height of the stabilizing cut-out is adjusted so that it is 1-2 mm less than the depth of the inlet in the grout channel of the pad. Grout tapes 2c are available in 2 variants (lower and upper) described in other parts of the description.

[0101] Upper surface of the pad: regardless of the type of used socket element 5, 5a, 5b, 5c and grout tape 2, 2a, 2b, 2c, it can be made with or without drainage grooves 6.

[0102] Fig. 13b shows, for the sake of clarity, the embodiment of a grout-forming filling element in the form of a grout tape 2, 2a, 2b, and 2c used according to the invention with the recommended socket elements 5, 5s, 5b and 5c, respectively.

[0103] In the first variant, for the pad 1 provided with continuous grooves 5a for the grout, it is recommended to install a grout tape 2 in the form of a strip tape without groove-shaped cutouts, which must be cut to the length of the side of the building slab 9, or a grout tape 2a provided with groove-shaped cut-outs 2d on its narrow side, adjusted to engage with the perpendicular grout tape 2a exactly at the places of their cross-connections with each other.

[0104] In the second variant of the invention, the pad does not have a continuous groove 5a for the grout, but instead holes or recesses are arranged in the pad in the form of grout inlets 5b, which are adjusted to accommodate the grout tape 2b, 2c. The grout tape 2b with dovetails 2e on one side is mounted in the grout inlets 5b using dovetails 2e and embedded in the pad, whereby it is necessary to cut the transverse grout tape 5b when mounting.

[0105] In turn, the grout tape 2c provided with dovetails 2e and groove-shaped cut-outs 2d on the opposite side for cross assembly is placed in the grout inlets 5b by means of the dovetails 2e with the groove-shaped cut-outs 2d facing upwards, and the grout tape 2c is mounted in the perpendicular grout inlets with the dovetails 2e with the groove-shaped cut-outs 2d facing downwards to be connected with the groove-shaped cut-outs 2d of the lower grout tape 2c at the intersection points.

[0106] In the third variant of the invention, in which the pad 1 comprises a continuous groove 5c for the grout and additionally stabilizing cut-outs 5d arranged in the bottom thereof for the dovetails 2e of the grout tape 2c or 2b, the grout tape 2b is mounted in the groove 5c for the grout in such a way that its dovetails enter into the stabilizing cut-outs 5d in the bottom of the groove 5c for the cross connection, with the necessity of cutting the grout installed transversely at each cross connection, preferably every 600 mm. In another variant using the grout tape 2c with the groove-shaped cut-out 2d and the dovetails 2e, the installation of the grout tape is carried out similarly as described above in the case of installation in the grout inlets 5b. In the case of the embodiment with a socket element 2 in the form of a continuous groove 5c for the grout with stabilizing cut-outs 5d in the bottom, the corresponding grout tape 2b and 2c, which is adjusted for connection in this groove 5c, is raised, i.e. it has a greater width than the grout tape 2, 2a, 2b, 2c for other embodiments, increased by the depth of the groove 5c for the grout together with the stabilizing cut-out 5d.

[0107] According to an embodiment of the invention, in the pad 1, a separate grout-forming filling element in the form of a grout tape 2b, 2c is provided with groove-shaped cut-outs 2d extending from the edge of one of the narrow sides of the grout tape, which are spaced apart from each other along the entire length of the tape, wherein the depth of the groove-shaped cut-outs is from 40% to 60% of the width of the grout tape 2, 2b, 2c, 2d constituting the filling element, and the spacing between adjacent groove-shaped cut-outs 2d, measured between their centres of symmetry, is adjusted to the dimensions of the side of the building slabs 9 being laid and constitutes preferably the sum of the length of the side of the building slab 9 being laid and the thickness of the grout-forming filling element 2, 2a, 2b, 2c in the form of a grout tape 2, 2a, 2b, 2c, and wherein the centre of symmetry of the first groove-shaped cut-out 2d, viewed from the beginning of the tape, is spaced from the peripheral edge of the beginning of the tape by a distance equal to the sum of the length of the side of the building slab 9 being laid for which the pad is intended and half the thickness of the grout tape 2, 2a, 2b, 2c.

[0108] In the embodiment, the groove-shaped cut-outs 2d described above are provided in the grout tape 2b, 2c, wherein, as shown in figs. 12, 12c, 13b, in this case two variants of the shape of the grout tape 2b and 2c are provided, one upper and one lower, for example, as shown in figs. 12c, 13c. In the variant of the lower grout tape 2c, i.e. arranged as the first in the grout inlets 5b of the pad, the groove-shaped cut-outs 2d are arranged on the opposite narrow side of the grout tape 2c in relation to the dovetails 2e. In the second variant of the upper grout tape 2c cooperating with the lower grout tape 2c, both the groove-shaped cut-outs 2d and the dovetails 2e are arranged along the same narrow side of the grout tape 2c, at intervals from each other.

[0109] In a further embodiment of the invention, shown for example in figs. 8-10, the pad 1 in all embodiments of the invention, shown for example in figs. l-13b, has been additionally provided with a channel 8 forming a passage for passing cables, wherein the channel is made on the lower, underside of the pad 1 and has the form of culvert grooves 8 extending perpendicularly to each other from the centres of the edges of the pads 1 to their geometric centre, converging approximately at a right angle, forming the outline of a cross, wherein the channels 8 are rounded in an arc at the point of intersection. Additionally, the bottoms of the channels 8 at the junction with their side walls are rounded in an arc to avoid sharp bends in the cables being passed.

[0110] In order to mark the upper side of the pad 1 and to distinguish it from the lower side when laying the base subfloor and connecting the pads to each other, the marking M is placed on one of the sections la, lb, 1c, Id of the upper side of the pad, which may advantageously be a company logo, as shown in the figure.

[0111] Fig. 2 shows an example of how to connect the pads 1 together in order to create a base subfloor for building slabs 9, in this case a stoneware building slab 9. Namely, four pads 1 are connected to each other at their corners by means of a form-friction connection of the protrusions 4 and the pockets 3, two protrusions and two pockets on each lateral edge of the pad 1, forming a square between the grooves 5a, 5c for the grout, then a strip-shaped section of a separate filling element 2, 2a, 2b, 2c is inserted with a slight press fit into the grout grooves 5a, 5c, which are positioned flush with each other in a line, and a uniform grout section 2 is formed, preferably additionally connecting the pads 1. Then, perpendicular sections of the filling element 2 are inserted into the perpendicular, free grooves 5, 5c for the grout, creating grout sections cut to size, so that one section of the grout always connects at a right angle to the uniform section of the other grout, previously inserted into the perpendicular grooves 5 a, 5 c for the grout.

[0112] According to another embodiment, in which the filling element in the form of a grout tape 2b, 2c is provided with groove-shaped cut-outs 2d for cross-connection arranged at intervals along the length of the tape on the side of one of its narrow sides, first in the grooves 5a, 5c for the grout or in the grout inlets 5b, said grout tape 2b, 2c with a length greater, preferably many times greater, than the length of the side of the pad 1 is placed in the corresponding grooves for the grout or grout inlets, respectively, oriented so that the groove-shaped cut-outs 2d are faced upwards and the dovetails 2e are faced downwards. Then, in the perpendicular, formed from longer sections of the grout tape 2b, 2c grout, arranged in parallel grooves 5a, 5c or placed in inlets 5b for the grout, another filling element is arranged perpendicularly to them in the form of a grout tape 2a, 2b, 2c provided with groove-shaped cut-outs 2d for cross assembly and optionally with dovetails 2e adjusted to the discontinuous grout inlets 5b of the pad, which grout tape is in this case oriented with the groove-shaped cut-outs 2d facing downwards and optionally, if present, with the dovetails 2e facing downwards, respectively, whereby the two longer sections of the grout tape extending perpendicularly are joined together in a crosswise manner at the intersections by means of the groove-shaped cut-outs 2d adjusted positionally. In the regions limited between the connecting sections of the groutforming filling element, arranged as above in the grooves or inlets for the grout, a building slab 9 is laid.

[0113] In a preferred embodiment, the groove-shaped cut-out 2d of the tape forming grout 2 has the shape of a rectangle with dimensions of 6 mm + / - 1 mm (cut-out base) and 11 mm + / - 1 mm cut-out height. The centre of symmetry of the first groove-shaped cut-out, viewed from the edge of the edge, i.e. from the beginning of the grout tape 2a, 2c, for the variant of making the pad 1 for the building slabs 9 in the shape of a square with sides of approximately 600 mm, is always located at a distance of approximately 603 mm from the edge of the tape on its edge (with a tolerance of + / - 2 mm). Each subsequent centre of symmetry of the groove-shaped cut-out 2d will be arranged at a distance of approximately 606 mm from the centre of symmetry of the first or preceding groove-shaped cut-out 2a with a tolerance of + / -1 mm, along the length of the narrow side of the grout tape 2a, 2c forming the grout.

[0114] Figs. I la and 1 lb show an embodiment of the assembly of the pads 1 with a filling element 2 forming a grout placed in the grooves 5c for the grout, which element is made in accordance with the embodiment shown in fig. 11, i.e. it is a grout tape 2c provided with groove-shaped cut-outs 2d arranged at intervals along one of its narrow edges.

[0115] As shown in fig. I la, the installation begins with the positioning of the grout tape 2a with the narrow side provided with groove-shaped cut-outs 2d facing upwards, wherein the first groove-shaped cut-out from the edge side of the tape 2a and each subsequent one should be flush with the edges of the groove 5a, 5c for the grout placed in the pad 1.

[0116] The parallel grooves 5a, 5c for the grout in the pads 1 (preferably positioned every 600 mm for a building slab with a side length of 600 mm) are filled with grout tape 2, 2a, 2c in a manner analogous to that in the first groove 5a for the grout.

[0117] Fig. 12 shows an example of mounting a grout tape 2c constituting a filling element shaped according to the embodiment of fig. 12c, which is mounted with dovetails 2e in the grout inlets 5b of the pad 1, shown in figs. 12-12b, and figs. 13, 13a show an alternative embodiment in which in continuous grooves 5c forming a grout, provided with groove-shaped cut-outs 2d on the surface of the bottom, the grout tape 2c is mounted as the filling element provided with groove-shaped cut-outs 2d and dovetails 2e, which are adjusted to the dimensions, shape, and arrangement of the stabilizing cut-outs 5d of the continuous grooves 5c.

[0118] If the grout-forming filling element 2 in the form of tape 2 is longer than the required surface area of the installed pad, the tape should be cut off in accordance with the end edge of the installed pad 1.

[0119] When all the parallel grooves 5a, 5c for the grout or, alternatively, the grout inlets 5b arranged in a line have been filled with the grout tape 2, 2a, 2b, 2c, it is necessary to start installing the grout tape 2a, 2c, forming the grout in the transverse grooves 5 a, 5 c for the grout or, respectively, in the grout inlets 5b in another embodiment of the installed pads 1. The grout tape 2, 2a, 2c forming the grout should be placed in the grooves for the grout or in the grout inlets 5b, aligned by means of the dovetails 2e, with the edge with the groove-shaped cut-outs 2d facing downwards, wherein the groove-shaped cut-out 2d of the upper tape 2a, 2c should ideally fit into the groove-shaped cut-out 2d of the lower tape 2a, 2c, i.e. be placed therein with a fit, as shown in fig. 11b. Then the upper tape forming the grout 2, 2a, 2c is cut in accordance with the side edge of the entire installed surface of the pads 1. Similarly, the grout tape 2b and 2c is mounted using the dovetails 2e in the socket elements in the form of discontinuous grout inlets 5b.

[0120] Advantageously, the places where the upper and lower tapes are joined, in the places where they contact and cross each other, are optionally secured with a suitable adhesive.

[0121] It is also advantageous to use gluing a grout-forming tape with continuous grooves 5, 5c for the grout and grout inlets 5b, forming a grout channel of the pad 1, at points between the intersections of the lower and upper grouts.

[0122] Optionally, the grout connection point can be glued with cyanoacrylate, epoxy or polyurethane, or other suitable glue.

Claims

Claims1. A pad (1) for building slabs, intended for connection with a plurality of pads (1) when making a base subfloor from pads (1) connected together, advantageously in a form connection, for building slabs when laying them, wherein the pad (1) has a polygonal shape in a plan view with an outline close to a quadrangle, wherein each edge of the pad is provided with a protrusion and a pocket adjusted in shape to it for connecting the pads with each other, and on its upper surface the pad (1) is provided with a through hole (6a), located on each of the four identical sections of the upper surface of the pad (1), wherein the through hole (6a) on the lower, underside of the pad (1) is connected to a drainage channel system for draining water, wherein the through hole (6a) together with the drainage channel system (7) formed on the underside of the pad (1) forms the drainage system of the pad (1), characterized in that the pad (1) is adjusted to accommodate and secure an additional filling element (2, 2a, 2b, 2c) forming a grout on its upper surface, in such a way that it is provided with socket forming elements (5, 5a, 5b, 5c) constituting the recesses, adjusted to accommodate the grout forming filling element (2, 2a, 2b, 2c) and extending in a straight line from the centre of the edge of each pad (1) towards its geometric centre, which converge in this geometric centre of the pad (1) at a right angle, preferably in the shape of a cross, dividing the pad (1) into four identical sections (la, lb, 1c, Id), wherein the grout forming filling element (2, 2a, 2b, 2c) is in the form of an elongated grout tape (2, 2a, 2b, 2c) and comprises at least two elongated grout sections in contact with each other at right angles and the socket forming elements (5, 5a, 5b, 5c) constituting the recesses have the shape and dimensions adjusted to the shape and dimensions of the corresponding filling element (2, 2a, 2b, 2c) in the form of a grout tape, furthermore each section (la, lb, 1c and Id) of the pad (1) is provided with at least a two-stage, double catching system in the form of a two-stage catch for creating a form-friction connection between the pads (1) laid next to each other, mutually connected to form a base subfloor for building slabs (9), which two-stage catch consists of protrusions (4) arranged along the outer edge of each section (la, lb, 1c, Id) of the pad and protruding outwards from the edge of the pad (1), and pockets (3) adjusted by shape and directly adjacent to them in the form of cut-outs extending inwards in relation to the outer edge of each section (la, lb, 1c, Id) of the pad, and each protrusion (4) is preferably in the shape of a polygon, which has an outer first major base (4a) of greater length than a first minor base (4b) parallel thereto, located inwards in relation to the first major base (4a), wherein the first minor base (4b) of the protrusion is flush with the second major base (4c) of the protrusion and constitutes a partial section of said second major base (4c) of the protrusion, and wherein said second major base (4c) of the protrusion is of greater length than the length of the first major base (4a) of the protrusion protruding outwards in relation thereto.

2. The pad 1 according to claim 1, characterized in that in each protrusion (4) having a polygonal shape with an outer first major base (4a) having a length greater than the length of the first minor base (4b) parallel thereto, located inwardly in relation to the first major base (4a), the first minor base (4b) is connected to the first major base (4a) by means of sides of the protrusion (4) extending from its ends at an angle a, falling within 40 to 70°, and advantageously within 50 to 60° thereto, wherein the second major base (4c) of the protrusion (4) being in contact with and flush with the first minor base (3a) of the pocket (3), which is also polygonal, located at the outer edge ofeach section (la, lb, 1c, Id) of the pad (1), directly adjacent to the second major base (4c) of the protrusion, wherein the first minor base (3 c) of the pocket being connected in turn by its ends through the inclined sides of the pocket (3), extending at an angle P of between 40 and 70°, and preferably between 50 and 60°, in relation to the first minor base (3c) of the pocket, with the second major base (3a) of the pocket parallel thereto, located inwardly in relation to the outer edge of the pad (1).

3. The pad 1, according to claim 1 or 2, characterized in that at least one protrusion (4) and at least one adjacent pocket (3) are provided along each outer edge of each section (la, lb, 1c, Id) of the pad, and at least two protrusions (4) and at least two adjacent pockets (3) are provided along the length of each edge of the pad (1).

4. The pad according to one of claims 1-3, characterized in that a two-stage catching system, used in connecting the pads (1) to each other to form a base subfloor for building slabs (9), consist of at least two catch stages, first and second, wherein the first catch stage being defined and formed between the first major base (4a) of the protrusion (4) and the first minor base (4b) of the protrusion (4), along the a-angled inclined connecting sides, on both sides of the protrusion (4) and having two connection locking points each on both sides of the protrusion (4), while the second catch stage is formed between the second major base (4c) of the protrusion (4) and the first major base (3a) of the pocket (3), on both sides of the pocket (3) along the P- angled inclined sides that connect the ends of the first major base (3a) of the pocket (3) to the ends of the second major base (4c) of the protrusion (4), and has two connection locking points on both sides of the pocket each, and wherein the second catch stage acts as an additional reinforcement for the first catch stage, advantageously increasing, at least twice, the force required to break the connection between the pads (1).

5. The pad according to one of claims 1-4, characterized in that the two-stage catch consisting of at least two protrusions (4) and two pockets (3) on each side edge of the pad (1) has a more developed connection line length by about 40 to 45% in relation to the side length of the pad (1) and an increased friction force between the connected pads (1) in proportion to the development of the connection line length when making a base subfloor for building slabs (9), and thus the connection force of the pads (1) is increased within the same percentage limits by about 40 to 45%, which is proportional to the contact surface area of the connected pads (1).

6. The pad according to one of claims 1-5, characterized in that in the socket-forming elements (5, 5a, 5b, 5c) extending in a straight line, the sections of the grout-forming filling element (2, 2a, 2b, 2c) in the form of a grout tape (2, 2a, 2b, 2c) are preferably embedded with a lightly pressed-in connection selected from: form and form-dovetail, wherein the filling element (2. 2a, 2b, 2c) in the form of a grout tape (2, 2a, 2b, 2c) is adjusted in terms of the material from which it is made to the material of the pad (1), and the width of the filling element in the form of a grout tape (2, 2a, 2b, 2c) is greater than the thickness of the used building slab (9) so that in the position embedded in the socket-forming elements (5, 5a, 5b, 5c) the upper edge of the filling element (2, 2a, 2b, 2c) is positioned, preferably at least 2 mm below the upper edge of the building slab (9) being laid.

7. A pad according to one of claims 1-6, characterized in that the socket forming elements (5, 5a, 5c) have the form of continuous grooves (5a) for the grout, in the form of linear recesses or continuous grooves (5c) for the grout provided withstabilizing cut-outs (5d) arranged at intervals from each other in the surface of the bottom of these grooves (5c), wherein in the grooves (5a, 5c) for the grout there is placed with a slightly pressed-in form connection preferably a separate, adjusted to the grooves (5a, 5c) in terms of dimensions, arrangement of stabilizing cut-outs and material, filling element (2, 2a, 2b, 2c), forming the grout in the form of sections of the grout tape (2, 2a, 2b, 2c), with a width depending on the thickness of the laid building slab (9) and being the result of the action of: from the sum of the depth of the groove (5a) for the grout + the thickness of the used building slab (9), preferably 2 mm should be subtracted, preferably the width of the filling element (2) is approximately 3 mm greater than the thickness of the used building slab (9) with the depth of the groove (5a) for the grout being preferably 5 mm.

8. The pad according to one of claims 1-7, characterized in that the socket forming elements (5) are shaped in the form of continuous grooves (5c) and additionally have, arranged inside them, along their lower surface, spaced apart each other stabilizing cut-outs (5d) with dimensions adjusted to the grout tape (2a, 2b, 2c) fitted thereto, preferably provided with at least the dovetails (2e), and more preferably with the dovetails (2e) and with groove-shaped cut-outs (2d) on at least one narrow side, wherein the stabilizing cut-outs (5d) preferably have a depth of 2 to 5 mm and the sum of the surface areas of all the stabilizing cut-outs (5d) arranged in the groove (5 c) for the grout usually constitutes from 2% to 98%, preferably from 5% to 96% of the lower surface area of the groove (5c), depending on the number and dimensions of the arranged stabilizing cut-outs (5d).

9. The pad according to one of claims 1-6, characterized in that the socket forming elements (5, 5a, 5b, 5c) have the form of elongated, discontinuous inlet recesses (5b), which are made in the pad (1) and extend from the upper surface of the pad through its thickness towards the lower surface of the pad, either blind or through, in the form of recesses or inlet holes, respectively, forming grout inlets (5b) with a preferably rectangular outline, which are spaced along straight lines along the length of the pad (1) and extend from the centre of the edge of each pad (1) towards its geometric centre, wherein the grout inlets (5b) are adjusted to be mounted in them with a slightly pressed-in- dovetail connection a separate, adjusted to them in terms of shape and dimensions and a material of the filling element (2, 2b, 2c) forming the grout, which has the form of a grout tape (2b, 2c) provided on one of its narrow sides with protrusions projecting outwards, arranged along the entire length of this narrow side, forming dovetails (2e) of the grout with an outline similar to elongated rectangles, which are adjusted in terms of shape, dimensions and arrangement to the grout inlets (5b) arranged on the upper surface of the pad (1).

10. The pad according to one of claims 1-9, characterized in that a separate groutforming filling element in the form of a grout tape (2, 2a, 2b, 2c) is provided with groove-shaped cut-outs (2d) extending from the edge of one of the narrow sides of the grout tape (2a, 2b, 2c), which are spaced apart each other along the entire length of the tape, wherein the depth of the groove-shaped cut-outs (2d) is from 40% to 60% of the width of the grout tape (2, 2a, 2b, 2c) constituting the filling element, and the spacing between adjacent groove-shaped cut-outs (2d), measured between their centres of symmetry, is adjusted to the dimensions of the side of the building slabs (9) being laid and is preferably the sum of the length of the side of the building slab (9) being laid and the thickness of the grout-forming filling element in the form of a grout tape (2, 2a, 2b, 2c), and wherein the centre of symmetry of the first groove-shaped cut-out(2d), viewed from the beginning of the tape, is spaced from the edge of the beginning of the tape by a distance equal to the sum of the length of the side of the building slab (9) being laid, for which the pad (1) is intended, and half the thickness of the grout tape (2, 2a, 2b, 2c).

11. The pad according to one of claims 6 and 8 - 9, characterized in that a separate grout-forming filling element in the form of a grout tape (2, 2a, 2b, 2c) has grooveshaped cut-outs (2d) arranged on the same narrow side as the tabs forming the dovetails (2e) and / or has groove-shaped cut-outs (2d) arranged on the narrow side opposite the tabs forming the dovetails (2e).

12. The pad according to one of claims 1-10, characterized in that reinforced fastening of the grout-forming filling element (2, 2a, 2b, 2c) in the form of a grout tape (2, 2a, 2b, 2c) in the socket-forming elements (5, 5a, 5b, 5c) in the form of a groove (5a, 5c) for the grout or grout inlets (5b) is obtained by using appropriate parameters of materials, preferably recycled and containing rubber, such as: a) the coefficient of friction between the material of the pad (1) and the material of the grout tape (2, 2a, 2b, 2c) is within the range of 1.07-1.2 n / n and b) the density of the material, wherein the ratio of the density of the material of the grout-forming filling element (2, 2a, 3b, 2c) and the material of the pad (1) is preferably between 0.85 and 0.95, i.e. in each case the percentage difference in density between the material of the grout-forming filling element (2, 2a, 2b, 2c) placed in groove (5a) for the grout of the pad (1) or in the grout inlet (5b) and the material of the pad (1) is not less than 10% and is usually from 10% to 15% less than the density of the material of the pad (1).

13. The pad according to one of claims 1-11, characterized in that it comprises a through hole (6a) located on each section (la, lb, 1c, Id) of the pad on the lower, underside of the pad (1), which is connected to drainage channels (7) of the underside arranged on the underside of the pad (1), formed as selected from:- drainage channels in the form of grooves extending from the centre of the edge of one of the sides of the underside of the pad (1) and connecting with the centre of the edge of the adjacent side of the underside of the pad, passing through and connecting with the through hole (6a); and / or- drainage channels (7) in the form of transverse and / or longitudinal and / or diagonal grooves arranged on the underside of the pad (1), extending at an angle, which connect each other at intersection points, forming a kind of grid; and / or- drainage channels (7) formed between spaced apart over the entire underside of the pad (1) and protruding downwards spacer elements, in the shape of any geometric figures, preferably polyhedral, rotary, or non-rotary; and / or- a corrugating system with a shape selected from: longitudinal, curved or broken curve with a depth of not less than 5% in relation to the thickness of the pad (1), preferably about 2 mm;14. The pad according to claims 1-12, characterized in that the grooves (6) are arranged on the upper surface of the pad (1), preferably connecting the edge of each of its corners with its geometric centre, and each groove (6) extends through and is connected to a through hole (6a) arranged on each of four identical sections (la, lb, 1c, Id) of the upper surface of the pad (1), wherein the through hole (6a) together withthe grooves (6) of the upper surface of the pad (1) and the drainage channels (7) formed on the underside of the pad (1) form a drainage system of the pad (1).

15. The pad according to claims 1-13, characterized in that it is additionally provided with a culvert channel (8) in the form of culvert grooves for conducting wiring, wherein the culvert channel (8) is formed on the lower, underside of the pad (1) and is in the form of culvert grooves (8) extending perpendicularly to each other from the centres of the particular edges of the pad (1) to its geometric centre, converging approximately at a right angle, forming the outline of a cross.

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