EP3744895A1 - Method for producing a traffic area, traffic area and pre-cast concrete panel - Google Patents

Abstract

Method for the production of a road traffic area (1), wherein at least one precast concrete slab (2) is applied to a mounting base (3). A plurality of assembly elements (4) are concreted into the precast concrete slab, which on the one hand have a filling channel (5) for pressing in a grouting material (6) and on the other hand have an adjusting element (7) for adjusting the height of the precast concrete slab. After applying the precast concrete slab, the height adjustment is carried out with the adjustment elements. The grouting material is pressed through the filling channels into the space (8) between the precast concrete slab and the mounting surface. A mixture of at least two components is used as the pressing material, one component being an organic polymer and one component being an inorganic silicon compound.

Description

The invention relates to a method for producing a traffic area or road traffic area - in particular in the course of the repair or upgrading of an already existing traffic area (existing roadway), with at least one precast concrete slab being applied to an assembly substrate, with a plurality of assembly elements being concreted into the precast concrete slab and wherein the assembly elements each have at least one filling channel penetrating the precast concrete slab for filling or pressing in a grouting material. The aim is to press the grouting material into the space between the prefabricated concrete slab and the mounting surface over the full area possible. The invention also relates to a traffic area and a precast concrete slab.

Methods of the type described above are known from practice in various embodiments. However, many of these methods have the disadvantage that a complete filling of the grouting material in the space between the prefabricated concrete slab and the mounting substrate is not always successful. Above all, the combination of a precisely positioned height adjustment of the precast concrete slab on the one hand with the most complete possible filling of the space between the precast concrete slab and the mounting substrate on the other hand cannot always be carried out in a trouble-free and functionally reliable manner. It is not uncommon for annoying cavities to arise that limit the long-term, trouble-free and damage-free operation of the road traffic area. This is especially true for large areas Precast concrete slabs. Often the grouting or filling of the intermediate spaces is carried out with a relatively high energy expenditure. Nevertheless, many known methods result in interfering cavities and / or a precise height adjustment of the precast concrete slabs is only possible to a limited extent. In this respect there is a need for improvement.

In contrast, the invention is based on the technical problem of specifying a method of the type mentioned at the beginning with which, on the one hand, a complete and full-area filling of the space between the precast concrete slab and the mounting substrate is possible in a simple and inexpensive manner and with which, on the other hand, a precise height adjustment of the precast concrete slabs can be carried out where the road traffic area produced meets all requirements in the long term. The invention is also based on the technical problem of specifying a suitable traffic area and a suitable precast concrete slab.

To solve this technical problem, the invention teaches a method for producing a traffic area or a road traffic area - in particular in the course of the repair or upgrading of an already existing traffic area (existing roadway) - wherein at least one precast concrete slab is applied to an assembly substrate, with the precast concrete slab a plurality of assembly elements is concreted in, the assembly elements each having at least one filling channel penetrating the precast concrete slab for filling or pressing in a grouting material and having at least one adjusting element for adjusting the height of the precast concrete slab,
after the precast concrete slab has been applied with the adjustment elements, the height adjustment is carried out by adjusting the vertical distance a between the precast concrete slab and the mounting substrate,
wherein grouting material is pressed through the filling channels into the space between the precast concrete slab and the mounting substrate and wherein a mixture of at least two components is used as the grouting material, one component being an organic polymer and one component being an inorganic silicon compound.

The precast concrete slabs are in particular precast concrete slabs that are square in plan view or precast concrete slabs that are square in plan view with at least two opposing rounded or curved side surfaces. It is within the scope of the invention that the precast concrete slabs have two surfaces that are parallel or essentially parallel to one another (top and bottom). According to one embodiment of the invention, the precast concrete slabs consist of concrete reinforced with fibers.

It is recommended that the grouting material - especially when it is introduced into the filling channels - comprises at least 50% by weight, in particular at least 60% by weight, preferably at least 65% by weight of the two components (organic polymer, inorganic silicon compound). According to a preferred embodiment of the invention, the grouting material has at least 70% by weight, in particular at least 75% by weight, preferably at least 80% by weight, preferably at least 85% by weight, apart from the water contained therein - especially when pouring into the filling channels .-% and very preferably at least 90% by weight of the two components (organic polymer, inorganic silicon compound). The grouting material is expediently designed as a two-component system and contains - apart from the water present - only the two components or essentially the two components (organic polymer, inorganic silicon compound). It is possible that the grouting material contains not only the two components and the water present, but also additives which - based on the mixture of the two components and the additives - preferably only in an amount of a maximum of 5% by weight, in particular a maximum of 4% by weight .-% and preferably a maximum of 3 wt .-% are provided.

It is within the scope of the invention that the organic polymer is at least one polyisocyanate or one polyisocyanate. Apart from the water contained therein, the grouting material has at least 20% by weight, in particular at least 25% by weight, preferably at least 30% by weight and preferably at least 35% by weight of polyisocyanate - especially when it is introduced into the filling channels. It is also within the scope of the invention that the inorganic silicon compound is at least one alkali metal silicate or one alkali metal silicate and in particular is at least one water glass or one water glass. Apart from the water contained in the grouting material, the grouting material has a proportion of at least 20% by weight, in particular of at least 25% by weight, preferably of at least 30% by weight and preferably of at least 35 - especially when it is poured into the filling channels % By weight of the inorganic silicon compound. The weight ratio of the two components (organic polymer, inorganic silicon compound) is expediently - especially when filling the grouting material into the filling channels - 2: 1 to 1: 2, preferably 1.5: 1 to 1: 1.5 and in particular 1.2: 1 to 1: 1.2.

It is also within the scope of the invention that the grouting material is pressed as a liquid resin mixture through the filling channels into the space between the precast concrete slab and the mounting substrate and preferably hardens in this space without foaming. The embodiment of curing without foaming is of particular importance. - It is within the scope of the invention that the space between a precast concrete slab and the mounting substrate is completely and completely filled with the grouting material so that no cavities remain between the precast concrete slab and the mounting substrate. According to a preferred embodiment of the invention, the method according to the invention is carried out with the proviso that the layer thickness of the grouting material between the precast concrete slab and the mounting substrate is 0.5 to 2.5 cm, preferably 0.7 to 2 cm and particularly preferably 1 to 2 cm, after the grouting material has hardened cm. A very preferred embodiment of the invention is characterized in that this layer thickness is 1.2 to 1.8 cm, in particular 1.3 to 1.7 cm. These layer thicknesses have proven particularly useful in the process according to the invention.

According to a particularly recommended embodiment of the invention, an assembly element of the precast concrete slab is also designed as a transport anchor for fixing the precast concrete slab to a transport device. The transport device can be a crane, for example. A mounting element expediently instructs in this embodiment its upper end has a fixation device, which is designed in particular as a fixation internal thread. The mounting element or the transport anchor is fastened to a transport device - for example to a crane - via this fixing device or via this internal fixing thread. With the transport device, a precast concrete slab is expediently transferred to its installation or laying location. It is within the scope of the invention that, following this transport or this transfer, the adjusting element is introduced into the associated assembly element, preferably screwed in.

The adjusting element preferably penetrates the precast concrete slab or the adjusting element completely penetrates the precast concrete slab. According to a particularly recommended embodiment of the invention, the adjusting element has the filling channel for the grouting material. For this purpose, the adjusting element is expediently designed to be hollow on the inside. It is within the scope of the invention that the height adjustment of the concrete slab with the adjustment element or with the adjustment elements of the assembly elements takes place before the injection material is pressed in through the filling channel of the adjustment element. For this purpose, the adjusting element is expediently designed as a screwable adjusting tube, the adjusting tube being movable or displaceable when screwing relative to the rest of the mounting element in the direction of the longitudinal axis L of the mounting element. For this purpose, an internal adjustment thread for screwing the adjustment tube is recommended on or in the mounting element. According to a preferred embodiment of the invention, the adjusting element has a manipulating element for screwing the adjusting element. According to one embodiment, this is one at the upper end of the adjusting element trained screw head, which is expediently designed as a polygonal head. The adjusting element can be screwed with the aid of this manipulating element, preferably a screw head, in the direction of the longitudinal axis L of the associated mounting element. It is within the scope of the invention that when screwing the adjusting element, the adjusting tube can be unscrewed from the underside of the precast concrete slab or screwed into the underside of the precast concrete slab. This enables a height adjustment or a vertical height adjustment of the concrete slab. A particularly recommended embodiment of the invention is characterized in that the adjusting element of an assembly element is removed from the precast concrete slab after the height adjustment and after the grouting material has been pressed in and cured. The adjusting element can then be reused with particular preference. This reusability of the adjusting elements is of particular importance in the context of the invention. Expediently, after the height adjustment and after the pressing in and hardening of the grouting material and preferably after the removal of the adjusting element, an opening on the mounting element that remains on the surface of the precast concrete slab is closed by a plug, in particular closed flush with the surface. The sealing plug can be a stainless steel concrete sealing plug.

A precast concrete slab used within the scope of the method according to the invention is recommended to have an area of 4 to 10 m ² , preferably 5 to 9 m ² and in particular an area of 6 to 8 m ² . Expediently, prefabricated concrete slabs are used which are from 100 to 450 mm, preferably from 150 to 400 mm and in particular from 180 to 300 mm thick exhibit. The surface area of a prefabricated concrete slab used in the process according to the invention is, for example, 300 cm x 600 cm or 250 cm x 500 cm.

A recommended embodiment of the invention is characterized in that a prefabricated concrete slab used in the method according to the invention is arcuate on at least two opposite side surfaces or on two opposite side surfaces. Two concrete slabs are then preferably connected to one another in a form-fitting manner with their arcuate side surfaces - arcuate side surface to arcuate side surface. The two curved side surfaces of a precast concrete slab are expediently its two opposite end side surfaces. According to a recommended embodiment, the two front side surfaces of a precast concrete slab are designed in an arc shape, while the other two side surfaces of the precast concrete slab are straight and parallel or essentially parallel to one another. Preferably, the two opposing arcuate side surfaces or arcuate end-side surfaces are also arranged parallel or essentially parallel to one another.

According to a preferred embodiment of the invention, at least one side surface or at least two opposite side surfaces of a concrete slab are each equipped with at least one form-fitting element or with a plurality of form-fitting elements for a form-fitting connection with an adjacent concrete slab. The form-fit elements are expediently designed as groove elements and / or spring elements and / or dowel elements and / or as dowel chambers. It is advisable, that two adjacent concrete slabs are connected to one another via a tongue and groove connection and / or via a groove and groove connection and / or via a dowel-dowel chamber connection or similar connection.

It is within the scope of the invention that the joint space between two concrete slabs connected to one another is filled with a joint sealing compound. It is recommended that the joint sealing compound is a multi-component system, in particular a two-component system. A multi-component system or a two-component system based on at least one sulfide or polysulfide is preferably used as the joint sealing compound. It is within the scope of the invention that the joint sealing compound used - particularly in the hardened state - is liquid-tight and fuel-resistant.

A particularly preferred embodiment of the invention is characterized in that two adjacent concrete slabs or two concrete slabs to be connected to one another are connected to one another via a groove-groove connection. At least one groove, in particular one groove, preferably extends in the longitudinal direction of each side surface of the side surfaces of the two concrete slabs to be connected to one another. The grooves of the two concrete slabs are expediently arranged at the same level or essentially at the same level. It is recommended that the two grooves of the side surfaces or end surfaces of the two concrete slabs to be connected to one another are designed to be mirror-symmetrical with respect to a mirror plane arranged between the two side surfaces of the concrete slabs. When connecting the two concrete slabs the two grooves and the further joint space between the side surfaces of the concrete slabs are expediently filled with the joint sealing compound. This groove-groove connection of two concrete slabs has proven particularly useful in the context of the invention.

A particularly preferred embodiment of the method according to the invention is characterized in that prefabricated concrete slabs are used which have at least one grouting material channel in their underside on the mounting substrate side and preferably have at least two grouting material channels. A grouting material channel expediently runs perpendicular or essentially perpendicular to a side surface of the concrete slab. It is recommended that these are linear or essentially linear grouting material channels. The invention is based on the knowledge that with the grouting material channels, on the one hand, an effective distribution of the grouting material in the space between a precast concrete slab and the mounting base can be achieved. On the other hand, the grouting material channels can be used to control a complete or full-surface distribution of the grouting material in the intermediate space. In this context, a preferred embodiment is characterized in that at least one grouting material channel is designed to be open towards a side surface of the precast concrete slab. Preferably, all grouting material channels or all ends of these grouting material channels are designed to be open towards the side surfaces of the concrete slab. According to one embodiment of the invention, at least two grouting material channels are arranged parallel to one another or essentially parallel to one another. It is within the scope of the invention that a grouting material channel extends from a side surface of the concrete slab to the opposite side surface of the concrete slab extends and is expediently designed to be open to these side surfaces of the concrete slab. This enables efficient control of the complete or full-surface distribution of the grouting material on the side surfaces of the concrete slab. It is recommended that a grouting material channel has a depth t of 2 to 20 mm, preferably 3 to 10 mm, and that preferably a grouting material channel a width b of 20 to 100 mm, in particular 30 to 70 mm and preferably from 40 to 60 mm.

It is within the scope of the invention that a precast concrete slab with at least three, preferably with at least four assembly elements is used for the method according to the invention. It is recommended that each assembly element has a filling channel for the grouting material and, preferably, an adjusting element for adjusting the height of the precast concrete slab. It has already been explained that, according to a particularly preferred embodiment, the adjusting element present in a mounting element has the filling channel and the filling channel expediently extends in the longitudinal direction of the adjusting element from one end of the adjusting element to the other end of the adjusting element. To this extent, it is within the scope of the invention that the filling channel of the adjusting element is at least partially surrounded by an external thread of the adjusting element, which external thread is screwed or can be screwed into an adjusting internal thread of the mounting element. The filling channels expediently have a circular cross section. A preferred embodiment, which is of particular importance in the context of the invention, is characterized in that the inner diameter d of the filling channels of the assembly elements or of the adjustment elements is 10 to 100 mm, is preferably 20 to 80 mm, in particular 25 to 70 mm and preferably 25 to 65 mm. A very recommended embodiment is characterized in that the inside diameter of the filling channels is 30 to 60 mm. This inside diameter d of the filling channels is of particular importance in combination with the injection material used according to the invention. The injection material used according to the invention can be introduced in a particularly simple and reliable manner through the filling channels of the adjusting elements with the relatively small inside diameter d. Incidentally, the grouting material used according to the invention allows the adjusting elements, according to a particularly preferred embodiment of the invention, to be removed from the precast concrete slab or from the assembly elements following the height adjustment and after the grouting material has been pressed in and hardened, and indeed can be easily removed .

Furthermore, it is preferred within the scope of the invention that a central filling channel for filling or pressing in the grouting material is arranged in a central central surface section A of the concrete slab, the area of the central central surface section A preferably being 2 to 10%, preferably 2 to 5% of the Surface of the concrete slab. It is particularly preferred within the scope of the invention that the central filling channel is arranged centrally or essentially centrally with respect to the surface of the concrete slab. The central filling channel can be a filling channel of a mounting element or a separate central filling channel without a mounting element.

A particularly preferred embodiment of the method according to the invention is characterized in that a precast concrete slab with at least three, preferably with at least four assembly elements is used, each assembly element of the precast concrete slab, which is square in plan view, being arranged in a quarter V assigned to a corner of the concrete slab. A quarter V allocated to a corner of the concrete slab takes up 25% of the surface of the concrete slab. If at least four assembly elements are present, the imaginary center points of the assembly elements in the top view can be connected via imaginary lines to form a square or a rectangle. According to a preferred embodiment of the invention, each of the four assembly elements is arranged in an area quarter V assigned to a corner of the concrete slab. If, according to a preferred embodiment, a central filling channel is provided, if at least four mounting elements are present, all four mounting elements are preferably at the same distance or essentially the same distance from the central filling channel. It is recommended that the central filling channel is arranged centrally in an imaginary rectangle spanned by the connection of the center points of four assembly elements.

It was stated above that, according to a recommended embodiment of the invention, there is at least one grouting material channel in the underside of the concrete slab on the mounting substrate side. At least two such grouting material channels are preferably present and, according to a highly recommended embodiment of the invention, these two grouting material channels are at the same distance from the central filling channel. According to one embodiment of the invention, a concrete slab according to the invention has more than two grouting material channels, in particular three to twelve grouting material channels, preferably three to twelve grouting material channels which are parallel to one another or essentially parallel to one another.

The subject of the invention is also a traffic area, preferably a road traffic area, wherein at least one precast concrete slab is provided, which is applied to an assembly substrate with the interposition of a layer of grouting material, the precast concrete slab being equipped with a plurality of concreted assembly elements, the assembly elements each having at least one the precast concrete slab penetrating filling channel for the grouting material and each having at least one adjusting element for height adjustment of the precast concrete slab and wherein the grouting material has a mixture of at least two components, one component being an organic polymer and one component being an inorganic silicon compound. The preferred grouting material used has already been specified above.

The invention also relates to a precast concrete slab, the precast concrete slab being equipped with a plurality of concreted-in assembly elements, the assembly elements each having at least one filling channel for a grouting material penetrating the precast concrete slab and each having at least one adjusting element for adjusting the height of the precast concrete slab and with at least one side surface , preferably at least one form-fit element or a plurality of form-fit elements for connection to a further precast concrete slab is provided on at least one end face of the precast concrete slab. As already explained above, a groove provided on a side face or end face of the precast concrete slab is of particular importance Form-fit element to, wherein this groove expediently extends over the entire length of the side face or end face of the precast concrete slab. According to the preferred embodiment with a groove-groove connection of the precast concrete slabs, at least one groove is provided on each of two opposite side surfaces or end faces of the precast concrete slab, expediently a groove extending over the length of the side surface or end face. The precast concrete slab according to the invention is expediently equipped with adjusting elements which each have the filling channel and which can be removed from the precast concrete slab - preferably after the height adjustment and after the grouting material has been pressed in and hardened.

The invention is based on the knowledge that with the method according to the invention a particularly complete and full-area filling of the space between the prefabricated concrete slabs and the mounting substrate is possible. Nonetheless, a simple, inexpensive and, in particular, low-energy pressing of the pressing material can be carried out. The grouting material used according to the invention is of particular importance here, which is relatively fine-liquid and low-viscosity when it is filled or pressed into the filling channels of the assembly elements and is nonetheless characterized by fast setting. The grouting material according to the invention can be filled very completely into the space between the prefabricated concrete slabs and the mounting substrate without foaming and has an optimal strength development during hardening. In connection with the simple and effective introduction of the pressing material described above, there is also the preferred embodiment of FIG Mounting elements with their adjusting elements penetrating the concrete slab with integrated filling channels are of particular importance. They support fast, targeted and simple pressing in of the grouting material. The preferred arrangement and distribution of the assembly elements in a concrete slab - especially in combination with the preferably provided central filling channel - is also important here. Furthermore, the form-locking elements preferably present in the side surfaces of the concrete slabs in combination with the grouting material used according to the invention are decisive for a long-term, firm and stable arrangement of the laid concrete slabs. The preferred form-fit elements ensure an optimal transmission of transverse forces in the event of mechanical loads and, in connection with the injection material used according to the invention, have a surprisingly stabilizing effect with regard to a long service life of the traffic area produced according to the invention. The method according to the invention is characterized overall by its simplicity, low expenditure and relatively low costs. The pressing material used according to the invention is also relatively inexpensive. The grouting material is also characterized in particular by high weather resistance, in particular high frost resistance.

Fig. 1

eine perspektivische Darstellung einer Fertigbetonplatte zur Durchführung des erfindungsgemäßen Verfahrens (vor der Montage),

Fig. 2

bereits verlegte Fertigbetonplatten,

Fig. 3

eine Fertigbetonplatte für die Durchführung des erfindungsgemäßen Verfahrens in der Draufsicht,

Fig. 4

eine perspektivische Ansicht einer verlegten bzw. montierten Fertigbetonplatte mit eingepresstem Verpressmaterial im Zwischenraum,

Fig. 5

ein Montageelement für die Durchführung des erfindungsgemäßen Verfahrens und

Fig. 6

den Verbindungsbereich zweier Fertigbetonplatten mit entsprechenden Formschlusselementen.

The invention is explained in more detail below with reference to a drawing showing only one embodiment. It shows in a schematic representation:

Fig. 1

a perspective view of a precast concrete slab for performing the method according to the invention (before assembly),

Fig. 2

already laid precast concrete slabs,

Fig. 3

a precast concrete slab for carrying out the method according to the invention in plan view,

Fig. 4

a perspective view of a laid or mounted precast concrete slab with pressed grouting material in the space,

Fig. 5

a mounting element for carrying out the method according to the invention and

Fig. 6

the connection area between two precast concrete slabs with corresponding form-fitting elements.

The figures illustrate a method according to the invention for producing a road traffic area 1, in particular in the course of the repair or upgrading of an already existing traffic area (existing roadway). In the context of the method according to the invention, a plurality of precast concrete slabs 2 are preferably applied to an assembly substrate 3 in the exemplary embodiment. In the exemplary embodiment, the mounting substrate 3 may be a gravel base layer.

According to the invention, a plurality of assembly elements 4 is concreted into each precast concrete slab 2, the assembly elements 4 each having a filling channel 5 penetrating through the precast concrete slab 2 for filling or filling. Have pressing in of grouting material 6. The mounting elements 4 are preferred and, in the exemplary embodiment, are each equipped with an adjusting element 7 which is used to adjust the height of the respective precast concrete slab 2. After the precast concrete slab 2 has been placed on the mounting substrate 3, the height adjustment of the precast concrete slab 2 is carried out with the adjusting elements 7 by adjusting the vertical distance a of the precast concrete slab 2 to the mounting substrate 3. The adjusting elements 7 are explained in more detail below.

According to the invention, the grouting material 6 is pressed through the filling channels 5 of the assembly elements 4 into the space 8 between the precast concrete slab 2 and the assembly substrate 3. The filling channels 5 of the mounting elements 4 expediently and in the exemplary embodiment have a circular or an essentially circular cross section. The inner diameter d of the filling channels 5 is preferably 25 to 70 mm, in particular 30 to 65 mm, in the exemplary embodiment. Preferably, and in the exemplary embodiment, a precast concrete slab 2 is equipped with four assembly elements 4, each of which has a filling channel 5 and an adjusting element 7. Particularly preferred, and in the exemplary embodiment, a mounting element 4 is provided in the area quarter V of each corner of the precast concrete slab 2. An area quarter V corresponds to 25% of the surface of the precast concrete slab 2. Recommended and in the exemplary embodiment, a central filling channel 17 for filling or pressing in the grouting material 6 is also arranged in a central central area section A of the concrete slab 2. Preferably, and in the exemplary embodiment, the area of the central central surface section A is 2 to 5% of the surface of the concrete slab 2. It is within the scope of the invention that the central filling channel 17 is provided centrally in the concrete slab 2 as in the exemplary embodiment.

According to the invention, the pressing material 6 filled or pressed in through the filling channels 5 of the assembly elements 4 is a mixture of at least two components. One component corresponds to an organic polymer and one component to an inorganic silicon compound. It is within the scope of the invention that the organic polymer is a polyisocyanate and that the inorganic silicon compound is an alkali silicate, in particular a water glass. The weight ratio of the two components in the mixture is preferably 1.2: 1 to 1: 1.2 in the exemplary embodiment. The mixture of the two components is pressed as a liquid resin mixture through the filling channels 5 into the space 8 between the precast concrete slab 2 and the mounting substrate 3, and the grouting material 6 hardens in this space, preferably without foaming. The layer thickness of the hardened grouting material in the space 8 is preferably 0.5 to 2 cm, preferably 1 to 2 cm, in the exemplary embodiment. It is within the scope of the invention that the intermediate space 8 between the precast concrete slab 2 and the mounting substrate 3 is pressed completely and over the entire surface with the pressing material 6.

Especially in the Figures 1 and 2 it can be seen that, preferably and in the exemplary embodiment, a precast concrete slab 2 is formed in an arc shape on two opposite end faces 9. Two concrete slabs can be connected to one another in a form-fitting manner with their curved end face surfaces 9 - curved side surface 9 on curved side surface 9. The end-side surfaces 9 can each have a plurality of Have form-fitting elements for a form-fitting connection with an adjacent concrete slab 2. The corresponding form-fit connections are described below in connection with Fig. 6 explained in more detail. Appropriately and in the exemplary embodiment, the joint space 14 between two concrete slabs 2 is filled with a joint sealing compound, the joint sealing compound preferably being a two-component system based on at least one sulfide or polysulfide.

According to a very preferred embodiment of the invention and in the exemplary embodiment, 2 grouting material channels 16 are present in the underside 15 of a concrete slab on the mounting substrate side. Preferably, and in the exemplary embodiment, two grouting material channels 16 are provided and a grouting material channel 16 expediently runs and in the exemplary embodiment perpendicular to two opposite side surfaces 9 of the concrete slab 2. In this case, preferably and in the exemplary embodiment, a grouting material channel 16 extends from a side face 9 of the concrete slab 2 to the opposite side surface 9 of the concrete slab 2. The two ends of the grouting material channel 16 are preferably designed to be open. The invention is based on the knowledge that with the grouting material channels 16, on the one hand, an effective distribution of the grouting material 6 in the intermediate space 8 is possible. On the other hand, the grouting material channels 16 serve to control the most complete and uniform distribution of the grouting material 6. This applies in particular to the grouting material channels 16, which are preferably open on the side surfaces 9 of the concrete slab 2. Here, at the opening of a grouting material channel 16 it can be determined whether grouting material 6 has reached this point and whether it is therefore the distribution of the grouting material 6 has taken place completely and over the entire surface. Expediently and in the exemplary embodiment, a grouting material channel 16 has a depth t of 3 to 10 mm and preferably a width b of 30 to 70 mm.

The Fig. 5 shows a particularly preferred embodiment of a mounting element 4 used according to the invention. Such a mounting element 4 is equipped with an adjusting element 7, which preferably and in the exemplary embodiment completely penetrates the concrete slab 2. Recommended and in the exemplary embodiment, the adjusting element 7 has the filling channel 5 for the grouting material 6, the filling channel 5 extending inside the adjusting element 7 over the entire length of the adjusting element 7. The filling channel 5 has an inner diameter d. The adjustment element 7 is used to adjust the height of the concrete slab and for this purpose the adjustment element 7 is preferred and, in the exemplary embodiment, is designed as a screwable adjustment tube 18. When screwing, this adjusting tube 18 can be displaced relative to the remainder of the mounting element 4 in the direction of the longitudinal axis L of the mounting element 4. For this purpose, the adjusting tube 18 is preferred and screwed into an adjusting internal thread 19 provided on the mounting element 4 in the exemplary embodiment. Appropriately and in the exemplary embodiment, a screw head 21 is provided at the upper end of the adjusting tube 18, which can be actuated with a screwing tool, not shown, so that in this way the adjusting tube 18 is screwed out of the underside 15 of the precast concrete slab 2 or screwed into the underside 15 of the precast concrete slab 2 can be. As a result, a height adjustment or a vertical height adjustment of the concrete slab 2 is possible. The adjusting element 7 or the adjusting tube 18 is recommended and in Embodiment placed in the course of the height adjustment of the concrete slab 2 on a plate 20 designed as a counter bearing on the mounting base 3. After the height adjustment of the concrete slab 2, the grouting material 6 is filled or pressed in at the upper end of an adjusting element 7 through the filling channel 5 of the adjusting element 7 and passes through the filling channel 5 to the space 8 between the concrete slab 2 and the mounting substrate 3 in the embodiment according to Fig. 5 the adjusting tube 18 has outlet openings 22 for the grouting material 6 at its lower end, the outlet openings 22 preferably being provided in a side wall of the adjusting tube 18 in the exemplary embodiment.

After the grouting material 6 has been pressed in and hardened, an adjusting element 7 according to a preferred embodiment of the invention can be screwed out of the mounting element 4 or its adjusting internal thread 19 and, according to a particularly recommended embodiment, the adjusting element 7 removed from the concrete slab 2 can then be used. It is also within the scope of the invention that, after the adjustment element 7 has been removed from the assembly element 4, the upper opening of the assembly element 4 is closed with a sealing plug 25, preferably flush with the surface. This plug 25 is in the Fig. 5 been indicated by dash-dotted lines.

According to the highly recommended embodiment and in the embodiment, the assembly elements 4 are also designed as transport anchors for fixing the precast concrete slab 2 to a transport device T. In Fig. 1 this design of the mounting elements 4 is shown as a transport anchor. A The precast concrete slab 2 is connected to the transport device T, which is designed as a crane, via the assembly elements 4. For this fixation, the mounting elements 4 preferably each have a fixation device in the form of a fixation internal thread 23 in the exemplary embodiment. The prefabricated concrete slab 2 is fixed to the transport device T via this fixing internal thread 23.

The Fig. 6 shows form-fitting connections between the end-side walls 9 of two precast concrete slabs 2 connected to one another Figure 6a ) shows a positive connection of the end face 9 of two adjacent precast concrete slabs 2 via a groove element 10 and a spring element 11 engaging therein. The joint space 14 between the two precast concrete slabs 2 or between the two form-fit elements is filled with a joint sealing compound 24. This is expediently a multicomponent system based on a polysulfide.

The Figure 6b ) shows a further connection of two end-side surfaces 9, a groove element 10 in the form of a recess being formed on each end-side surface 9. Both opposing groove elements 10 are preferably filled together with the entire joint space 14 by the joint sealing compound 24. This last-mentioned embodiment has proven particularly useful in the context of the invention. Here, on the one hand, tilting of the concrete slabs 2 connected to one another can be avoided and, on the other hand, the connection is characterized by an effective transmission of transverse forces in the event of mechanical loads. - Finally shows Figure 6c ) a form-fit connection between the end-face surfaces 9 two adjacent concrete slabs 2 via a dowel chamber connection. A dowel element 12 engages in a dowel chamber 13 and the joint space or the dowel chamber 13 is here also filled or pressed with a joint sealing compound 24.

Claims (20)

Method for the production of a traffic area or road traffic area (1), in particular in the course of the repair or upgrading of an already existing traffic area (existing roadway), wherein at least one precast concrete slab (2) is applied to an assembly substrate (3), with the precast concrete slab (2 ) a plurality of assembly elements (4) is concreted in, the assembly elements (4) each having on the one hand at least one filling channel (5) penetrating the precast concrete slab (2) for filling or pressing in a grouting material (6) and on the other hand at least one adjusting element (7) ) for height adjustment of the precast concrete slab (2),
wherein after the precast concrete slab (2) has been applied with the adjusting elements (7), the height adjustment is carried out by adjusting the vertical distance a of the precast concrete slab (2) to the mounting base (3),
wherein grouting material (6) is pressed through the filling channels (5) into the space (8) between the precast concrete slab (2) and the mounting base (3)
and wherein a mixture of at least two components is used as the pressing material (6), one component being an organic polymer and one component being an inorganic silicon compound. Method according to claim 1, wherein the grouting material (6) comprises at least 50% by weight, in particular at least 60% by weight, of the two components. A method according to any one of claims 1 or 2, wherein the organic polymer is a polyisocyanate. Method according to one of Claims 1 to 3, the inorganic silicon compound being at least one alkali metal silicate, in particular at least one water glass. Method according to one of Claims 1 to 4, the mixture being pressed as a liquid resin mixture through the filling channels (5) into the intermediate space (8) and hardening in the intermediate space (8) without foaming. Method according to one of Claims 1 to 5, a mounting element (4) being designed as a transport anchor for fixing the precast concrete slab (2) to a transport device. Method according to one of claims 1 to 6, wherein the adjusting element (7) of the assembly element (4) penetrates or completely penetrates the precast concrete slab (2) and wherein the adjusting element (7) has the filling channel (5) for the grouting material (6). Method according to one of Claims 1 to 7, wherein the adjusting element (7) is removed from the precast concrete slab (2) after the height adjustment and after the pressing-in and hardening of the grouting material (6) and is preferably reused. Method according to one of claims 1 to 8, wherein a precast concrete slab (2) is curved on at least two opposite side surfaces (9) and wherein preferably two concrete slabs (2) with their curved side surfaces (9) - curved side surface (9) on curved side surface (9) - be connected to one another in a form-fitting manner. Method according to one of claims 1 to 9, wherein at least one side surface (9), preferably two opposite side surfaces (9) of a concrete slab (2) each have at least one form-fit element, preferably a plurality of form-fit elements for a form-fit connection with an adjacent concrete slab (2) has / have and wherein the form-fitting elements are preferably designed as groove elements (10) and / or as spring elements (11) and / or as dowel elements (12) and / or as dowel chambers (13). Method according to one of Claims 1 to 10, the joint space (14) between two concrete slabs (2) being filled with a joint sealing compound, the joint sealing compound preferably being a multi-component system, in particular a two-component system. Method according to one of claims 1 to 11, wherein at least one grouting material channel (16) is present in the underside (15) of a concrete slab (2) on the mounting surface, at least two grouting material channels (16) preferably being provided and wherein a grouting material channel (16) expediently runs perpendicular or substantially perpendicular to a side surface (9) of the concrete slab (2). Method according to claim 12, wherein a grouting material (channel) (16) extends from one side surface (9) of the concrete slab (2) to the opposite side surface (9) of the concrete slab (2). Method according to one of claims 12 or 13, wherein a grouting material channel (16) has a depth t of 2 to 20 mm, preferably 3 to 10 mm, and wherein a grouting material channel (16) expediently has a width b of 20 to 100 mm, in particular from 30 to 70 mm. Method according to one of claims 1 to 14, wherein the inner diameter d of the filling channels (5) of the mounting elements (4) or the adjusting elements (7) is 10 to 100 mm, preferably 20 to 80 mm and in particular 25 to 70 mm. Method according to one of claims 1 to 15, wherein a central filling channel (17) for filling or pressing in the grouting material (6) is arranged in a central-central surface section A of the concrete slab (2), the surface of the central-central surface section A 2 to 10 %, preferably 2 to 5% of the surface of the concrete slab (2). Method according to one of claims 1 to 15, wherein a precast concrete slab (2) with at least three, preferably with at least four assembly elements (4) is used, each assembly element (4) is expediently arranged in each of a corner of the square prefabricated concrete slab (2) assigned in the plan view area quarter V. Traffic area, preferably road traffic area, - in particular produced with a method according to one of claims 1 to 17, - at least one precast concrete slab (2) being provided, which is applied to an assembly substrate (3) with the interposition of a layer of a grouting material (6), wherein the precast concrete slab (2) is equipped with a plurality of concreted-in assembly elements (4), the assembly elements (4) each having at least one filling channel (5) for the grouting material (6) penetrating the precast concrete slab (2) and each having at least one adjusting element (7) for adjusting the height of the precast concrete slab (2) and wherein the grouting material comprises a mixture of at least two components, one component being an organic polymer and one component being an inorganic silicon compound. Prefabricated concrete slab - in particular for carrying out the method according to one of claims 1 to 17 and / or for the traffic area according to claim 18 - wherein the prefabricated concrete slab (2) is equipped with a plurality of concreted assembly elements (4), the assembly elements (4) each have at least one filling channel (5) penetrating the precast concrete slab (2) for a grouting material (6) and at least one adjusting element (7) for adjusting the height of the precast concrete slab (2) and wherein on at least one side surface (9) - preferably on at least one end face - The precast concrete slab (2) at least one form-locking element, expediently a plurality of form-fitting elements is provided for connection to a further precast concrete slab (2). Prefabricated concrete slab according to claim 19, wherein the adjusting element (7) of a mounting element (4) has the filling channel (5) and wherein the adjusting element (7) - preferably after the height adjustment and after the pressing in and hardening of the grouting material (6) - from the mounting element ( 4) or from the precast concrete slab (2) can be removed.

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