DE102005032566A1 - Joint between concrete slabs, forming a walking/driving surface e.g. for multi-story car park decks and roofs, has an inserted joint profile to block poured concrete and support a joint seal - Google Patents

Abstract

To form a joint (13) in concrete surfaces (10), and especially between two concrete slabs (12), a joint profile (21) is inserted at the joint to prevent the entry of fresh concrete. The profile remains in place after concrete has been poured and is bonded into it at least partially. The joint has a larger cross section in a zone (31) at the upper surface (15) of the concrete than at the bottom (30) of the joint. A joint seal (32) is supported from below by the profile.

Description

The The invention relates to a method for producing a joint in concrete coverings, in particular between adjacent concrete slabs according to the preamble of claim 1. Furthermore, the invention relates to a covering for walking and / or passable roofs, especially parking roofs, Soil covers or the like, with several concrete slabs, which are spaced apart, with between adjacent ones Concrete slabs joints are formed, according to the preamble of the claim 5. Furthermore, the invention relates to a joint profile and spacers, which can be used in the process or the coating.

In known methods for producing joints, such as expansion joints in concrete coverings, for example, gauges are used which are positioned in the production of the concrete covering in the region of the joint to be formed and which are removed after the introduction and at least partial curing of the concrete. Such a method is for example from the DE 1 908 142 A known (file reference: P 19 08 142). The method has in principle no serious disadvantages and is still used in practice despite its advanced age (filing date: February 19, 1969). From this citation, an initially mentioned coating is known.

Of these, Based on the invention, the object is based, known methods to improve the production of joints in concrete coverings or a accordingly improved covering for walk-in and / or passable roofs propose.

to solution the above object is the inventive method characterized in that in the manufacture of a concrete flooring Joint profiles are positioned in the area of the joint to be formed, to prevent the penetration of fresh concrete into the joint area, and that the joint profiles after filling the concrete in the area the joint remain and at least partially embed in the concrete. In contrast to the prior art, the joint profiles are therefore not removed after the setting of the concrete, but remain as a kind of "lost formwork" in the concrete or in the Area of the fugue. The advantage of this solution is among others in that the joint can have a more complex geometry than in the conventional Processes that in particular do not allow undercuts. moreover deleted with the removal of the joint rails one operation.

According to one preferred embodiment of the method according to the invention is provided that the joint profiles to particular circulating closed Frame are joined together, with the fresh concrete each is filled in the frame thus formed, for the production of preferably large format Concrete slabs with preferably circumferential joint. The joint profiles thus serve to produce a mold for (large format) concrete slabs or the like on the one hand and for the production of the joint on the other. Fulfill in this way the joint profiles a beneficial dual function.

Preferably is provided that the joint profiles each on both sides of forming joint are positioned so that the joint is a symmetrical Cross section has. Furthermore, it is preferably provided that the mutual joint profiles through between the joint profiles usable separate spacers are secured in position wherein the spacers after the at least partial setting be removed from the concrete.

One Covering for accessible and / or passable (roof) surfaces, soil coverings or the like is for the solution the task set out in the invention, characterized in that the joints are bounded on both sides by joint profiles, wherein the Joint profiles in cross-section are designed such that the joint has a larger cross-sectional width in the region of an upper side of the covering than in a lower area of the joint, so one in the area of the top of the covering in the joint positionable joint sealing profile on the underside can be supported by the joint profiles is. The covering is preferably used in connection with parking roofs, but is also for Driveways, Walkways, terraces or the like, so earth covers in the General, suitable. Also use on other roof surfaces, such as Balconies etc. come into consideration.

It is preferably provided that the joint profiles upright side surfaces of Concrete slabs limit and in this way a formwork for the individual Form elements of the covering. Accordingly, according to a preferred embodiment, that the joint profiles, starting from the top over at least the majority the height the concrete slabs extend towards an underside of the concrete slabs.

An advantageous embodiment of the invention provides that the joint profiles are formed in angled several times in cross section, such that an upper portion of the joint for receiving the joint sealing profile has a width which corresponds approximately to the width of the joint sealing profile, or preferably has a slightly smaller width than the jointing profile, and that the joint profiles are then projecting projecting to the top of the interior of the joint, to form transverse support surfaces for a bottom of the jointing profile. In this way, the joint profile is safely supported on the underside, without further action must be taken. In particular, it is not necessary to fill the lower part of the joint so that, as a result, the entire joint width in the lower region is available for the discharge of moisture.

In a preferred embodiment provided that the joint profiles in the upper part of the joint upright run, preferably in cross section parallel to each other. Preferably the joint profiles following the projecting to the interior of the joint Angled area continue to be angled so that the Fug a lower area with a smaller width than the upper one Has area.

In a preferred embodiment Furthermore provided that the joint profiles are designed such that the lower region of the joint is preferably continuous until at least close the underside of the concrete slabs extends. In particular, run the joint profiles in the lower part of the joint upright, preferably in cross-section parallel to each other.

According to one Further development of the invention provides that the joint profiles also extend into the area of the top of the concrete slabs, to Protection of between top and upright side surfaces of the Concrete slabs formed edges. Preferably, the extend Joint profiles in a horizontal angled area in the area the top of the concrete slabs. Furthermore, it can be provided that the joint profiles in the area of the top angled in such a way are that a free end of the joint profile reported down in the concrete protrudes, or binds.

Also in the area of the underside of the concrete slabs can be provided that the joint profiles in a horizontally angled area in the area or in the vicinity extend the underside of the concrete slabs. This way will a footprint for the Profiles created, whereby the installation can be facilitated. Preferably, the joint profiles are in the area or near the bottom the concrete slabs then angled so that a free end of the Joint profiles upwards directed into the concrete protrudes or einbindet.

In a preferred embodiment The invention provides that the joint profiles a preferably circumferential and closed frame as formwork for the concrete slabs form. The frame can be made from straight-line floor profiles in the floor plan be formed in the area of the upright side surfaces of the Concrete slabs are arranged. Preferably, the frame is made in Floor plan angled joint profiles formed in the range of Corners of the concrete slabs are arranged and those with the straight lines Joint profiles are connected. Furthermore, for the connection of in longitudinal direction adjoining one another straight joint profiles special connection profiles be provided which have the same shape as the straight joint profiles, However, have different dimensions, so that they form fit in the joint area abut the joint profiles and can be connected to these.

at The production of the pad are preferably spacers for Insert that can be positioned between the mutual joint profiles are, with the shape of the spacer the joint cross-section between corresponds to the mutual joint profiles, so that the spacers laterally positive abut the joint profiles. According to a development is provided that the spacers in the area of the top of the concrete slabs having arranged Verhakungselemente, each side protruding arranged on the spacers and are formed such that they each engage in joint profiles.

In a preferred embodiment The invention provides that the joint sealing profile substantially flush with the top of the concrete slabs finally positioned in the covering is.

Farther claims the invention protection for a joint profile, which described above in connection with the process or the coating is trained, as well as for a corresponding spacer ..

Other Preferred developments or refinements of the invention result from the dependent claims and the description by the way. following becomes a preferred embodiment the invention explained with reference to the drawing. In this show:

1 a vertical cross-section through a parking roof in partial representation,

2 a vertical cross section through a joint profile,

3 : a plan view of interconnected joint profiles in a corner area,

4 a vertical cross section through a first spacer,

5 a vertical cross section through a second spacer,

6 a vertical cross-section through a butt connector,

7 : a part of a parking roof in plan view in a schematic representation,

8th a spatial representation of an arrangement of joint plates in a schematic representation, and

9 .: A spatial representation of a specially adapted corner of joint plates in a schematic representation.

In the embodiment shown in the figures is a coating 10 for a park roof 11 , The surface 10 consists of several concrete slabs 12 , each spaced apart on the park roof 11 are laid. Between the concrete slabs 12 are joints 13 educated. Preferably, the joints have 13 a constant width and are circumferential around each concrete slab 12 arranged around.

The joint 13 preferably extend over the entire height of the concrete slabs 12 between the respective mutually facing upright side surfaces 14 adjacent concrete slabs 12 , The joints thus preferably extend continuously from an upper side 15 to the bottom 16 the concrete slabs 12 ,

The covering described in detail below 10 from concrete slabs 12 with joint 13 is based on a parking roof 11 described. The surface 10 but is basically suitable for other purposes, such. As a coating for roads, sidewalks, terraces or the like, so for soil coverings in general. Furthermore, the covering can of course also be laid on balconies or other roof surfaces.

In the in 1 illustrated embodiment, it is assumed that a lower raw ceiling 17 a parking garage is available. The raw ceiling 17 usually consists of concrete and is on the top with a horizontal emergency seal 18 Mistake. Above the emergency seal follows a layer of thermal insulation 19 , in turn, with a two-ply seal 20 is provided. As far as it concerns the usual structure of a parking roof.

On the upper seal 20 becomes the coating 10 from concrete slabs 12 created. This takes place in cast-in-situ construction, ie on site at the construction site. For this purpose, first, the covering to be created 10 in individual concrete slabs 12 divided and thereby the location of the high points HP and low points TP set in order to derive the resulting surface water can. 7 shows a corresponding system sketch. From this system sketch results the division of the covering 10 in the individual concrete slabs 12 and thus the course of the joints 13 between the mutually facing side surfaces 14 adjacent concrete slabs 12 ,

In the area of the joints to be made 13 become special joint profiles 21 established. The joint profiles 21 rest on a foam strip on the underside 22 , which serves to compensate for height differences. In the place of the foam strip 22 Other elastically deformable materials may also be used. Alternatively, the joint profiles 21 also directly on the seal 20 stand.

The joint profiles 21 serve as formwork for the concrete slabs 12 , For this purpose, the joint profiles 21 connected to preferably closed, surrounding frame, each one to be produced concrete slab 12 surround. Concrete is then added to these frames 45 filled until the concrete 4 on the upper side substantially flush with the joint profiles 21 concludes. Too much filled concrete 45 can be deducted if necessary.

In contrast to known methods for the production of parking roofs 11 or a covering 10 from concrete slabs 12 the joint profiles remain 21 in their position, ie, they become after setting or partial setting of the concrete 45 not removed. The joint profiles 21 are used as lost formwork, so to speak.

How out 1 visible come on both sides of the fugue 13 identical joint profiles 21 used, but mirrored, so that the joint 13 has a symmetrical cross-section. This in 1 on the left side of the fugue 13 shown joint profile 21 is in 2 shown on a larger scale and is described in detail below: In the area of the joint 13 exists the joint profile 21 from an upper, upright section 23 , an oblique section adjoining it on the underside 24 and a lower, upright section adjacent thereto 25 , At the top section 23 and the lower section 25 close each two horizontal sections 26 . 27 at. The free ends 28 . 29 are each 90 ° to the horizontal sections 26 . 27 Angled so that they go to the inside of the concrete slab 12 point.

In common consideration of the 1 and 2 This results in the following assignment of the sections of the joint profile 21 to the areas of the fugue 13 or the areas of the concrete slab 12 : The lower horizontal section 27 of the joint profile 21 serves as a contact area. With this area or section rests the joint profile 21 on the foam strip 22 , The subsequent lower section 25 runs upwards, preferably vertically and limits the concrete slab 12 or the fugue 13 in a lower joint section 30 , In this lower joint section 30 the joint is formed with a small width. As in 1 the lower section is visible 25 of the joint profile 21 to the fugue 13 flush with the foam strip 22 arranged so that the lower joint section 30 with constant width over the lower section 25 and the foam strip 22 extends. In the obliquely running section 24 of the joint profile 21 the width of the joint is increased, namely in the direction of an upper joint portion 31 , which extends laterally through the upper upright section 23 of the joint profile 21 is limited. The adjoining horizontally directed section 26 extends along the top 15 the concrete slabs 12 , The free end 28 extends from the top 15 the concrete slab 12 to the interior of the same and serves to anchor the joint profile 21 in the concrete. The same purpose is fulfilled by the upward free end 29 that attach to the lower horizontal section 27 of the joint profile 21 followed. Accordingly, the course of the upright side surfaces 14 the concrete slabs 12 through the sections 23 . 24 and 25 formed the joint profile. The surrounding upper edges of the concrete slab 12 are due to the angled course of the upper section 23 and the horizontal section 26 protected. The joint profile 21 thus also serves to reinforce the upper edges of the concrete slabs.

A special feature with regard to the formation of the joints 13 not only is that the joint profiles 21 in the concrete 45 remain, but also in that the upper joint section 31 for receiving a joint sealing profile 32 is set up. The joint sealing profile 32 preferably has a greater width than the upper joint portion 31 making it under sealing contact with the upright upper sections 23 the mutual joint profiles 21 in the upper joint section 31 can be used. Preferably, this is done such that an upper side of the joint sealing profile 32 essentially flush with the top 15 the concrete slabs 12 runs. Below is the joint sealing profile 32 through the sloping sections 24 the mutual joint profiles 21 supported so that the jointing profile 32 not in the lower joint section 30 can be pressed. The sloping sections 24 the joint sealing profiles 32 thus serve as a support for the jointing profile 32 , Because of through the joint profiles 21 given shape of the fugue 13 are after concreting the concrete slabs 12 essentially no further operations in the area of the joint 13 to do to the final shape of the fugue 13 manufacture. In particular, eliminates the known from the prior art expansion of the joint 13 in the area of the top 15 the concrete slabs 12 , The lower joint section 30 also remains free and does not need to be filled to a support for the jointing profile 32 to accomplish. The production of the joint 13 takes place in a few steps and therefore correspondingly inexpensive.

The joint profiles 21 are preferably made of a stainless steel or sheet, such as V2A. The sheet thickness can be for example 1 mm. Basically, the joint profiles 21 be made of other materials, such as non-metallic building materials, such as plastic, composites, etc.

By way of example only, some dimensions of the individual sections of the joint profile shown below 21 called to convey the proportions: the free ends 28 . 29 each protrude by 10 mm into the concrete slab 12 into it. The upper horizontal section 26 can have a width of 16 mm. The upper section 23 may have a height of 25 mm. This is followed by the oblique section 24 on, in the embodiment shown by 60 ° to the upper section 23 is formed angled. The lower section 25 stands opposite the upper section 23 about 6 mm to the inside of the joint and extends over a height of 62 mm to 82 mm. The lower footprint of the lower horizontal section 27 can be 30 mm. Assuming a horizontal width of the lower joint section 30 from about 6 mm, so is the width of the upper joint section 31 at a horizontal extent of the oblique sections 24 of 6 mm in total 18 mm.

The joint sealing profile 32 preferably consists of an elastic plastic. As described above, the jointing profile has 32 an extra width, so it in the upper joint section 31 must be crushed or hit. For this purpose, the jointing profile 32 both sides protruding sealing lips 33 on and inner hollow chambers 34 ,

As mentioned above, the joint profiles are described 21 positioned so that they have a preferably closed, circumferential frame for each concrete slab 12 form. For conventional concrete slabs 12 with rectangular or square ground plan, the joint profiles extend 21 thus along the four upright side surfaces 14 , The frames are preferably formed in several parts and consist of substantially rectilinear groove profiles 21 in the area of upright side surfaces 14 and angled corner profiles 35 in the area of the floor corner corners of the concrete slab 12 , The straight joint profiles 21 and the corner profiles 35 be in a joint area 36 connected with each other. For this comes a shock profile 37 used in 6 is shown. The shock profile 37 has the same shape as the straight joint profiles 13 and the corner profile 35 but has smaller dimensions, so that it is essentially form-fitting on the of the joint 13 facing away in the joint profile 21 one-sided and the corner profile 35 can be inserted on the other side. joint profile 21 and corner profile 35 thus stump against each other. The joint 36 is on the of the fugue 13 opposite side by the shock profile 37 covered. Through a joint profile 21 or corner profile 35 provided hole 38 (please refer 2 ) can do this with the impact profile 37 be connected, for example by screws, rivets, etc. The individual sections of the shock profile 37 correspond to those of the joint profile 21 so that corresponding reference numerals are used for the individual sections.

Another special feature is in 4 and 5 shown. These show each spacer 39 . 40 involved in the production of concrete slabs 12 be used. In common consideration of the 1 and 4 respectively. 5 it can be seen that the spacers 39 . 40 intended to be between the joint profiles 21 to be placed. The shape of the spacers 39 . 40 therefore corresponds completely ( 4 ) or essentially ( 5 ) the cross-section of the joint 13 , Both spacers 39 . 40 have a lower jetty 41 , the shape and dimensions of the lower joint section 30 equivalent. This is followed by a chamber on the upper side 42 on, the outer shape and dimensions of the upper joint section 31 correspond. The chambers 42 also have a central cavity 43 on, which brings a saving of material without affecting the stability of the spacers 39 . 40 suffers. Alternatively, the spacers can of course without the chamber 42 be educated.

The in 5 shown spacers 40 is different from the spacer 39 according to 4 by two laterally projecting webs 44 that are angled. The bridges 44 lie on the horizontal sections 26 and the free ends 28 the mutual joint profiles 21 on, so the spacers 39 be held in their position. The bridges 44 thus serve as quasi Verhakungselemente. It can also be provided that the spacers 40 or their webs 44 are designed so that the spacers 40 latching with the joint profiles 21 are connectable. The spacers 39 . 40 are preferably made of plastic, but may also be made of other materials.

The spacers 39 . 40 be after putting up the joint profiles 21 into the fugue 13 used. The spacers 39 . 40 have only a small depth in the longitudinal direction of the joint 13 on and are spaced apart over the longitudinal direction of the joint 13 arranged distributed. This is done for the purpose that the raised frames from the joint profiles 21 can not move against each other, leaving the fugue 13 always has a constant width. In addition, it can be prevented in this way that the joint profiles 21 when filling the concrete 45 deformed by the concrete pressure and thus create irregular joint progressions.

Another peculiarity arises in consideration of the above in connection with the illustrations according to 7 to 9 , The surface 10 for the park roof 11 or the soil cover is laid or created so that accumulating surface water can be removed and preferably directed to processes, Gullis or the like. Accordingly, high points HP and low points TP are provided in the surface, between the surface 10 with a gradient. Accordingly, between the high points ridges and throats run between the low points.

As shown in 7 the area is divided into four areas, in each of which centrally a low point is provided. Because the concrete slabs 12 directly on the seal 20 created, must be due to the arrangement of the high and low points resulting inclination of the tops 15 the concrete slabs 12 be taken into account in the manufacture and arrangement of the frames. Because the top of the joint profiles 21 the top 15 the concrete slabs 12 should correspond to the joint profiles 21 be aligned exactly to the respective height. In addition, caused by the inclined course of the concrete slabs 12 Corner areas that do not exactly run in a 90 ° angle in the floor plan, so that the corner profiles 25 must be adjusted accordingly.

According to the legend in 7 This results in four types of profile gradients. 8th shows an example of the course of joint profiles 21 between a high point HP and a low point TP. Starting from the HP high point, the joint profiles run in all four directions 21 angled downwards, whereas starting from a low point TP, the joint profiles 21 Angled ascending are formed, provided that the joint profiles 21 do not extend along a horizontal throat, so in this case they are horizontal. 9 serves to illustrate a corner profile 35 that does not exactly have a 90 ° angle in the floor plan, but rather due to the height of the concrete slabs 21 is adjusted.

The deviating distances between the underside of the joint profiles 21 and the seal 20 can by differently strong sealing profiles or foam strips 22 be balanced to prevent the concrete poured into the frame 45 in the area of the fugue 13 running.

10

covering

11

parking Deck

12

concrete slab

13

Gap

14

side surface

15

top

16

bottom

17

soffit

18

emergency sealing

19

thermal insulation

20

seal

HP

high point

TP

low

21

joint profile

22

foam strips

23

upper section

24

oblique section

25

lower section

26

horizontal section

27

horizontal section

28

free The End

29

free The End

30

lower joint section

31

upper joint section

32

Joint sealing profile

33

sealing lip

34

hollow

35

Corner profile

36

joint area

37

bumper profile

38

drilling

39

spacer

40

spacer

41

web

42

chamber

43

cavity

44

web

45

concrete

Claims (26)

Method for producing a joint ( 13 ) in concrete coverings, especially between adjacent concrete slabs ( 12 ), characterized in that in the production of a concrete covering joint profiles ( 21 ) in the region of the joint to be formed ( 13 ) to prevent the ingress of fresh concrete ( 45 ) in the joint area, and that the joint profiles ( 21 ) after filling the concrete ( 45 ) in the region of the joint ( 13 ) and at least partially in the concrete ( 45 ). Method according to claim 1, characterized in that the joint profiles ( 21 ) are connected to particular surrounding frames, whereby the fresh concrete ( 45 ) is filled in each case in the frame thus formed, for the production of preferably large-sized concrete slabs ( 12 ) with in particular circumferential joint ( 13 ). Method according to claim 1 or 2, characterized in that the joint profiles ( 21 ) on both sides of the joint to be formed ( 13 ) are positioned such that the joint ( 13 ) has a symmetrical cross-section. Method according to one of the preceding claims, characterized in that the mutual joint profiles ( 21 ) through between the joint profiles ( 21 ) usable separate spacers ( 39 . 40 ) are secured in their position, the spacers ( 39 . 40 ) after the at least partial setting of the concrete ( 45 ) are removed. Covering for walkable and / or passable (roof) surfaces, in particular parking roofs ( 11 ), Soil coverings or the like, with several concrete slabs ( 12 ), which are laid at a distance from each other, wherein between adjacent concrete slabs ( 12 ) Put ( 13 ) are formed, characterized in that the joints ( 13 ) on both sides by joint profiles ( 21 ), the joint profiles ( 21 ) are formed in cross-section such that the joint ( 13 ) in the area ( 31 ) of an upper side ( 15 ) of the covering ( 10 ) has a larger cross-sectional width than in a lower region ( 30 ) of the fugue ( 13 ), so that one in the area of the top ( 15 ) of the covering ( 10 ) in the fugue ( 13 ) positionable joint sealing profile ( 32 ) at the bottom through the joint profiles ( 21 ) is supportable. Covering according to claim 5, characterized in that the joint profiles ( 21 ) upright side surfaces ( 14 ) of concrete slabs ( 12 ) limit. Covering according to claim 5 or 6, characterized in that the joint profiles ( 21 ) starting from the top ( 15 ) over at least the major part of the height of the concrete slabs ( 12 ) in the direction of a lower side ( 16 ) of concrete slabs ( 12 ). Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) are formed in cross section a plurality of angled, such that an upper area ( 31 ) of the fugue ( 13 ) for receiving the joint sealing pro fils ( 32 ) has a width which is approximately the width of the joint-sealing profile ( 32 ), or preferably a slightly smaller width than the joint-sealing profile ( 32 ), and that the joint profiles ( 21 ) to the upper area ( 31 ) then to the interior of the joint ( 13 ) projecting angled, for the formation of transverse support surfaces for a bottom of the joint-sealing profile ( 32 ). Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in the upper area ( 31 ) of the fugue ( 13 ) upright, preferably in cross section parallel to each other. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) following the interior of the joint ( 13 ) projecting angled area continue to be angled such that the joint ( 13 ) a lower area ( 30 ) with a smaller width than in the upper area ( 31 ) having. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) are formed such that the lower region ( 30 ) of the fugue ( 13 ) preferably continuously to at least near the bottom ( 16 ) of concrete slabs ( 12 ). Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in the area below ( 30 ) of the fugue ( 13 ) upright, preferably in cross section parallel to each other. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) also in the area of the upper side ( 15 ) of concrete slabs ( 12 ), to protect between the top ( 15 ) and upright side surfaces ( 14 ) of concrete slabs ( 12 ) formed edges. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in a horizontally angled section ( 26 ) in the area of the upper side ( 15 ) of concrete slabs ( 12 ). Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in the area of the upper side ( 15 ) are angled such that a free end ( 28 ) of the joint profile ( 21 ) directed downwards into the concrete ( 45 ) protrudes or integrates. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in a horizontally angled section ( 29 ) in the area or near the bottom ( 16 ) of concrete slabs ( 12 ). Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) in the area or near the bottom ( 16 ) of concrete slabs ( 12 ) are angled such that a free end ( 29 ) of the joint profile ( 21 ) directed upwards into the concrete ( 45 ) protrudes or integrates. Covering according to one of the preceding claims, characterized in that the joint profiles ( 21 ) a preferably circumferential and closed frame as a formwork for the concrete slabs ( 12 ) form. Covering according to one of the preceding claims, characterized in that the frame consists of floor plan profiles which are straight in plan ( 21 ) formed in the region of the upright side surfaces ( 14 ) of concrete slabs ( 12 ) are arranged. Covering according to one of the preceding claims, characterized in that the frame consists of in plan angled joint profiles ( 21 ) formed in the region of corners of the concrete slabs ( 12 ) and the with the straight joint profiles ( 21 ) are connected. Covering according to one of the preceding claims, characterized in that for the connection of longitudinally adjoining straight-line joint profiles ( 21 ) special connection profiles ( 37 ) are provided, which have the same shape as the straight joint profiles ( 35 ), but different dimensions, so that they are in the joint area ( 36 ) form fit on the joint profiles ( 21 ) and are connectable to these. Covering according to one of the preceding claims, characterized in that spacers ( 39 . 40 ) between the mutual joint profiles ( 21 ) are positionable, the shape of the spacers ( 39 . 40 ) the joint cross-section between the mutual joint profiles ( 21 ), so that the spacers ( 39 . 40 ) laterally positively to the joint profiles ( 21 ) issue. Covering according to one of the preceding claims, characterized in that the spacers ( 39 . 40 ) in the area of the upper side ( 15 ) of concrete slabs ( 12 ) arranged hooking elements ( 44 ), each laterally projecting on the spacers ( 39 . 40 ) are arranged and are formed such that they each joint profiles ( 21 ) behind. Topping after one of the previous arrivals claims, characterized in that the jointing profile ( 32 ) substantially flush with the top ( 15 ) of concrete slabs ( 12 ) finally in the covering ( 10 ) is positioned. Joint profile ( 21 ) according to any one of the preceding claims. Spacers ( 39 . 40 ) according to any one of the preceding claims.