DE102022131325A1 - Formwork element and arrangement of formwork elements - Google Patents

Abstract

The invention relates to a formwork element and an arrangement of a plurality of formwork elements. A formwork element (1) for producing a concrete component comprises a connecting element (5) and a number of opposite side elements (3, 3') firmly connected thereto, the connecting element (5) being U-shaped and having a lower horizontal leg (5.H), a first vertical leg (5.V) and a second vertical leg (S.V'), the legs (5.V, 5.V') pointing upwards relative to the horizontal leg (5.H), a first side element (3) being arranged on the outside of the first vertical leg (5.V) and a second side element (3') being arranged on the outside of the second vertical leg (S.V'). According to the invention, the side elements (3, 3') are made of non-combustible fiber concrete. According to the invention, the arrangement comprises a plurality of formwork elements (1), wherein a gas-tight sealing strip (6) is arranged at a joint between two side elements (3, 3') of adjacent formwork elements (1).

Description

The invention relates to a formwork element having the features of the preamble of claim 1. The invention also relates to an arrangement of a plurality of formwork elements having the features of the preamble of claim 5.

A formwork element is known from the prior art. The formwork element has formwork panels that are connected to one another by at least one connecting element. The connecting element bridges the gap between opposing formwork panels. The connecting element is connected to the formwork panels.

Formwork elements are known which have formwork panels made of fiber concrete.

Out of DE 299 17 134 U1 A formwork element is known which has formwork panels and U-brackets.

Out of EN 10 2015 121 810 A1 A formwork element is known which has formwork walls and a U-shaped connecting element.

The invention is based on the object of providing an improved formwork element and an improved arrangement of a plurality of formwork elements.

The object is achieved according to the invention with regard to the formwork element by a formwork element having the features of claim 1. With regard to the arrangement of a plurality of formwork elements, the object is achieved according to the invention by a formwork element having the features of claim 5.

Advantageous embodiments of the invention are the subject of the subclaims.

A formwork element is used to produce a concrete component and comprises a connecting element and a number of opposite side elements firmly connected to it. The connecting element is U-shaped and has a lower horizontal leg, a first vertical leg and a second vertical leg, the vertical legs pointing upwards relative to the horizontal leg. A first side element is arranged on the outside of the first vertical leg and a second side element is arranged on the outside of the second vertical leg. According to the invention, the side elements are made of non-combustible fiber concrete.

This fiber concrete is therefore assigned to building material class A, which means that it is a non-combustible building material. Fiber concrete is preferably a panel material that is made from wood cement, for example, or that is made from exclusively non-combustible materials, including fibers.

This creates a formwork for a reinforced concrete element to be concreted, for example for a ring beam or a lintel, whereby the side elements form the permanent formwork for the reinforced concrete element to be concreted.

The formwork element according to the invention makes it possible for the side elements of the formwork element not only to become a permanent formwork when the reinforced concrete element has been concreted, but for the side elements themselves to become part of the reinforced concrete element; in the sense that they can be taken into account statically when determining a concrete cover for reinforcement of the reinforced concrete element.

One embodiment of the formwork element according to the invention provides that the thickness of the side elements is 7 mm, 8 mm or more. It is possible for a side element, e.g. made of fiber concrete, to be designed as a single or double-layer element. The double-layer element can, for example, be made of two individual panels, each 4 mm thick, which are connected to one another.

A further embodiment of the formwork element according to the invention provides that the thickness of the vertical legs is 18 mm or more.

If the thickness of the side elements is at least 7mm each and the thickness of the vertical legs is 18mm each, the distance from an outer side of the side element to the inner side of the corresponding vertical leg is 7mm + 18mm = 25mm.

After the precast concrete element has been cast, the poured concrete and the side elements form a homogeneous structure, with the profiles (claws) incorporated into the galvanized U-shaped connecting elements contributing to the fact that the poured concrete combines with the formwork to form a compact unit.

Openings of approx. 10 mm, preferably incorporated into the connecting elements, serve to compact the concrete and ensure that the space between the connecting element and the side element is filled with concrete so that no hollow spots or gaps arise in the concrete structure after hardening.

The minimum concrete cover of the reinforcement for ring beams and ring anchors is determined by the exposure class to be used. It must be taken into account whether the component in question is always subject to permanently dry ambient conditions. In this case, classification in exposure class XC1 is possible. Reinforced concrete ring beams and reinforced concrete ring anchors that are not exposed to direct weathering due to facade cladding such as plaster or masonry can be classified in exposure class XC3 based on DAfStb Issue 600, Chapter 4.3, taking into account a concrete cover allowance of Δcdev = 10 mm. If a thermal insulation composite system is planned, classification in exposure class XC 1 is possible according to DAfStb Issue 600, Chapter 4.3. Under certain circumstances, for example quality controls during planning, design, manufacture and construction and/or when using precast elements, the above-mentioned allowance Δcdev may be reduced by 5 mm. A minimum concrete cover of the reinforcement in the reinforced concrete component of at least 10 mm must be demonstrably ensured.

$$\text{Expositionsklasse XC3}->{\text{c}}_{\text{nom}}={\text{c}}_{\text{min}}+\mathrm{\Delta }{\text{c}}_{\text{dev}}=20\text{ mm}+5\text{ mm}=25\text{ mm}\text{.}$$

Due to the above-mentioned design of the invention, it is normatively possible to provide the nominal dimension of the concrete cover as follows: $$\text{Exposure class XC1}->{\text{c}}_{\text{name}}={\text{c}}_{\text{min}}+\mathrm{\Delta }{\text{c}}_{\text{dev}}=10\text{mm}+5\text{mm}=15\text{mm}$$

$$\text{Exposure class XC3}->{\text{c}}_{\text{name}}={\text{c}}_{\text{min}}+\mathrm{\Delta }{\text{c}}_{\text{dev}}=20\text{mm}+5\text{mm}=25\text{mm}\text{.}$$

This means that all design rules can be complied with for exposure classes XC1 and XC3, since the non-combustible side element with a thickness of 7 mm and the non-combustible connecting element as a spacer with a thickness of 18 mm mathematically fulfill the verification of compliance with the minimum concrete cover of the reinforcement for ring beam formwork elements - in accordance with the specifications of DIN EN 1992/NA. A minimum concrete cover of 15 mm or 25 mm according to exposure class XC1 or XC3 is complied with for all components susceptible to corrosion.

This means that a concrete cover can be maintained on the side without having to use separate spacers to maintain a lateral distance between the lateral reinforcement and the outside of the corresponding side element. The lateral reinforcement can simply be placed on the vertical leg and still maintains a distance of at least 7mm + 18mm = 25mm. It has been shown that the invention creates a very good bond between the poured concrete and the formwork element.

After the filled concrete has hardened, the side elements have the same properties as the hardened concrete.

A further embodiment of the formwork element according to the invention provides that the side elements have a projection of 7 mm relative to a lower edge of the horizontal leg and that the thickness of the horizontal leg is 18 mm or more.

This means that a concrete cover can be maintained not only at the sides, but also downwards, without having to use separate spacers to maintain a distance between a lower reinforcement and a component below the side elements. The lower reinforcement can simply be placed on the horizontal leg and still maintains a distance of at least 7mm + 18mm = 25mm.

A further embodiment of the formwork element according to the invention provides that the side elements are coated on the inside with an adhesive so that the concrete to be poured in bonds particularly securely to the side elements. The adhesive is particularly preferably non-flammable.

A further embodiment of the formwork element according to the invention provides that the side elements are screwed to the connecting elements using self-sealing screws. The screws preferably have a countersunk head, on the conical section of which milling ribs are arranged. This means that the side elements can be screwed to the connecting elements without having to drill countersunk holes in the side elements in a separate operation.

An arrangement comprises a plurality of formwork elements according to the invention. According to the invention, a gas-tight sealing strip is arranged at a joint between two side elements of adjacent formwork elements. As a result, no air can penetrate from the outside into the area of the joint, which usually forms a gap. This makes it possible in a simple manner to seal the joints of adjacent formwork elements, in particular adjacent side elements, to such an extent that neither weather influences from the outside nor oxygen penetrating into the joint area from the outside damages the reinforcement arranged behind the side elements through corrosion. This means that no oxygen can penetrate from the outside.

One embodiment of the arrangement according to the invention provides that the sealing tape is arranged over an upper edge of the adjacent side elements and at least 5mm downwards on the inside of the side elements. This makes it easy to seal the joints of adjacent formwork elements, in particular adjacent side elements, in such a way that neither weather influences from above nor oxygen penetrating the joint area from above damages the reinforcement arranged behind the side elements through corrosion. This means that no oxygen can penetrate from above.

A further embodiment of the arrangement according to the invention provides that a formwork adhesive is arranged under the lower edges of the side elements. The formwork adhesive is particularly preferably also a sealant. The adhesive is particularly preferably a one-component, solvent-free adhesive sealant, which is particularly preferably produced on the basis of silane-terminated polymers and/or on the basis of polyurethane and/or on the basis of silyl-modified polymer.

This makes it possible to seal the joints between adjacent formwork elements, particularly adjacent side elements, in such a way that neither weather influences from below nor oxygen penetrating the joint area from below damages the reinforcement arranged behind the side elements through corrosion. This means that no oxygen can penetrate from below. The sealant can be applied easily, for example using cartridges.

A further embodiment of the arrangement according to the invention provides that a formwork adhesive is arranged in the area of the joint between the two side elements of adjacent formwork elements between the front sides of the abutting side elements. The adhesive is also particularly preferably a one-component, solvent-free adhesive sealant, which is particularly preferably made from silane-terminated polymers and/or from polyurethane and/or from silyl-modified polymers. The joints between adjacent formwork elements, in particular adjacent side elements, are thus sealed particularly securely, so that neither weather influences nor oxygen penetrating into the joint area damages the reinforcement arranged behind the side elements through corrosion. This means that no oxygen can penetrate into the joint area.

A further embodiment of the arrangement according to the invention provides that in the area where the two side elements of adjacent formwork elements meet, a U-shaped clamp profile is attached to the top of both adjacent side elements. This makes it very easy to fix adjacent formwork elements against each other and a cover strip is mechanically protected in a simple manner in the upper area of the formwork elements.

A further embodiment of the arrangement according to the invention provides that the sealing tape is arranged at least 10mm above an outer surface of a component below the side elements. For example, the component below the side elements is a wall crown on which a ring beam or ring anchor is to be concreted. This makes it possible to seal the joints of adjacent side elements with a particularly high level of security in such a way that neither weather influences from below nor from below into the Oxygen penetrating the joint area will damage the reinforcement behind the side elements through corrosion. This means that no oxygen can penetrate from below.

A further embodiment of the arrangement according to the invention provides that corresponding end faces of adjacent side elements of the formwork elements have a tongue and groove design, an offset or a stepped fold. This makes it very easy to position and/or fix adjacent formwork elements against each other.

A further embodiment of the arrangement according to the invention provides that the sealing tape comprises a fabric. The sealing tape can therefore serve as a plaster base and/or for stabilization. Unintentional bulging of the sealing tape when pouring concrete into the formwork elements can thus be prevented even in the case of comparatively large gaps between adjacent side elements.

The sealing tape is preferably a butyl tape. This is particularly advantageous because such a sealing tape is particularly permanently gas-tight and also has very good adhesive properties, meaning it can be very easily bonded to the outside of the side elements.

A further embodiment of the arrangement according to the invention provides that in the area of the joint between the two side elements of adjacent formwork elements, a gap is arranged between the front sides of the abutting side elements, the width of which is suitable for the flow of a liquid fine fraction of a concrete to be introduced into the formwork elements. An area of the joint in the sense of the invention therefore does not mean that side elements of adjacent formwork elements have to touch each other, but that they can also be spaced apart to form a gap. The width of the gap is large enough that cement slurry can flow into the gap up to the sealing tape and close this gap. The gap is preferably larger than 2 mm or 3 mm or 4 mm.

Preferably, spacer elements are arranged to define the width of the gap. This ensures that when using concrete with a specified, particularly liquid, consistency, the liquid fines in the concrete completely fill the gap. This means that the joints between adjacent formwork elements, particularly adjacent side elements, are sealed particularly securely, so that neither weather influences nor oxygen penetrating the joint area damage the reinforcement arranged behind the side elements through corrosion. This means that no oxygen can penetrate into the joint area.

Embodiments of the invention are explained in more detail below with reference to drawings.

• 1a eine erste Ausführungsform eines erfindungsgemäßen Schalungselements in Schnittdarstellung,
• 1b eine weitere Ausführungsform eines erfindungsgemäßen Schalungselements in Schnittdarstellung,
• 2 eine schematische perspektivische Darstellung eines Verbindungselementes,
• 3 eine zugehörige Schnittdarstellung,
• 4 eine perspektivische Darstellung einer Schraube,
• 5 eine auszugsweise perspektivische Darstellung einer Ausführungsform einer erfindungsgemäßen Anordnung zweier Schalungselemente,
• 6 eine auszugsweise Schnittdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen,
• 7 eine auszugsweise Schnittdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen,
• 8 eine zugehörige perspektivische Darstellung,
• 9 eine auszugsweise Schnittdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen,
• 10 eine auszugsweise Schnittdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen,
• 11a eine schematische Darstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen,
• 11b eine schematische Darstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen und
• 12 eine schematische Darstellung einer weiteren Ausführungsform der erfindungsgemäßen Anordnung von Schalungselementen.

Shown here:

• 1a a first embodiment of a formwork element according to the invention in sectional view,
• 1b a further embodiment of a formwork element according to the invention in sectional view,
• 2 a schematic perspective view of a connecting element,
• 3 an associated sectional view,
• 4 a perspective view of a screw,
• 5 a partial perspective view of an embodiment of an arrangement of two formwork elements according to the invention,
• 6 a partial sectional view of another embodiment of the arrangement of formwork elements according to the invention,
• 7 a partial sectional view of another embodiment of the arrangement of formwork elements according to the invention,
• 8th an associated perspective representation,
• 9 a partial sectional view of another embodiment of the arrangement of formwork elements according to the invention,
• 10 a partial sectional view of another embodiment of the arrangement of formwork elements according to the invention,
• 11a a schematic representation of another embodiment of the arrangement of formwork elements according to the invention,
• 11b a schematic representation of another embodiment of the arrangement of formwork elements according to the invention and
• 12 a schematic representation of a further embodiment of the arrangement of formwork elements according to the invention.

Corresponding parts are provided with the same reference numerals in all figures.

1a shows a schematic sectional view of a formwork element 1 for producing a reinforced concrete component, namely a ring beam or ring anchor, above a component 2, here a masonry. The formwork element 1 has a lateral first side element 3 and a lateral second side element 3', which are spaced apart from one another.

A U-shaped connecting element 5 is arranged in an interior space 4 of the formwork element 1 formed by the side elements 3, 3'. The connecting element 5 has a first vertical leg 5.V, a second vertical leg 5.V' and a lower, horizontal leg 5.H. The side elements 3, 3' are attached to the vertical legs 5.V, 5.V' of the connecting elements 5. Reinforcement elements B are arranged in the interior space 4 of the reinforced concrete component to be concreted.

The side elements 3, 3' are made of fiber concrete, which is made exclusively from non-combustible components.

The formwork element 1, which has several connecting elements 5 for connecting opposite side elements 3, 3', can be used for producing ring beams or ring anchors, in particular for concreting on conventional masonry.

The formwork element 1 can be used as permanent formwork, i.e. the side elements 3, 3' do not have to be removed after concreting, but remain in their position and can be plastered, for example.

For exposure classes XC1 and XC3, all design rules can be met with formwork element 1, since the non-combustible side element 3, 3' with a thickness of 7 mm and the non-combustible connecting element 5 as a spacer with a thickness of 18 mm mathematically fulfill the verification of compliance with the minimum concrete cover of the reinforcement for ring beam formwork elements. A minimum concrete cover of 25 mm is maintained.

With the formwork element 1, a concrete cover can be maintained on the side without having to use separate spacers to maintain a lateral distance between a lateral reinforcement B and the outside of the corresponding side element 3, 3'. The lateral reinforcement B can simply be placed on the vertical leg 5.V, 5.V' and still maintains a distance of at least 7mm + 18mm = 25mm. It has been shown that the formwork element 1 creates a very good bond between the filled concrete and the formwork element 1. After the filled concrete has hardened, the side elements 3, 3' have the same properties as the hardened concrete.

In the formwork element 1, the side elements 3, 3' have a projection ü of 7 mm from a lower edge of the horizontal leg 5.H; the thickness of the horizontal leg 5.H is 18 mm. This means that the concrete cover can be maintained not only laterally, but also downwards, without having to use separate spacers to maintain a distance between the lower reinforcement and the component 2 below the side elements 3, 3'. The lower reinforcement B can simply be placed on the horizontal leg 5.H and still maintains a distance of at least 7 mm + 18 mm = 25 mm.

The side elements 3, 3' are coated on the inside with a non-flammable adhesive so that the concrete to be poured in bonds particularly securely to the side elements 3, 3'.

1b shows a schematic sectional view of a formwork element 1 for the manufacture of a reinforced concrete component, namely a beam. The formwork element 1 has, analogously to 1 a side first side element 3 and a lateral second side element 3', which are spaced apart from one another. A third side element 3" is arranged on the underside of the lower, horizontal leg 5.H.

With the formwork element 1, a lateral concrete cover can be maintained without having to use separate spacers to maintain a lateral distance between a lateral reinforcement B and the outside of the corresponding side element 3, 3'. The lateral reinforcement B can simply be placed on the vertical leg 5.V, 5.V' and still maintains a distance of at least 7mm + 18mm = 25mm. The lower reinforcement B can simply be placed on the horizontal leg 5.H without having to use separate spacers to maintain a lower distance between a lower reinforcement B and the underside of the third side element 3", and still maintains a distance of at least 7mm + 18mm = 25mm. It has been shown that the formwork element 1 creates a very good bond between the poured concrete and the formwork element 1. The side elements 3, 3, 3" have the same properties as the cured concrete after the poured concrete has hardened.

2 shows a connecting element 5 used for the formwork element 1 according to the invention, which is made of sheet metal with a thickness of 2.5 mm. In each vertical leg 5.V, two through holes (not shown) are optionally provided, into which, for example, screws (not shown) or other fastening means (not shown), such as set bolts (not shown), can be inserted for fastening side elements 3, 3' not shown here. In the horizontal leg 5.H, three through holes (not shown) are optionally provided, into which, for example, screws (not shown) or other fastening means (not shown) can be inserted for fastening a side element 3" not shown here.

3 shows a section of an embodiment of a formwork element 1 with a connecting element 5 and a side element 3 or 3'. The connecting element 5 is made of sheet metal with a thickness of at least 1 mm, preferably with a thickness between 1.0 mm and 1.5 mm, and has a cross-section that includes two edge-side flanges 5.1 parallel to the formwork, each with a width of 4 mm, two outer webs 5.2, two outer flanges 5.3 parallel to the formwork and on the formwork side, each with a width of 13 mm, two inner webs 5.4 and a middle intermediate flange 5.5 parallel to the formwork and facing away from the formwork, with a width of 12 mm. The connecting element 5 has an element height b of 18 mm and a total element width y of 46 mm.

To fasten the side element 3, 3', a screw S was screwed through the same, which penetrates the intermediate flange 5.5. The screw S has a countersunk head and is self-sealing. The formwork element 1 according to the invention can therefore be manufactured particularly quickly and thus particularly cost-effectively.

4 shows a section of the screw S with countersunk head. The countersunk head has milling ribs S. 1 on the underside, so that the screw S can be screwed into the side elements 3, 3' without a countersunk hole having to be made in the side elements 3, 3' beforehand. The screw S inserted into the side elements 3, 3' in this way is hermetically sealed against the side element 3, 3' (not shown here) into which it is screwed.

5 shows a partial perspective view of an embodiment of an arrangement of two formwork elements 1 according to the invention. The two adjacent side elements 3 shown belong to two formwork elements 1 arranged next to each other with a gap. A sealing tape 6, which is a butyl tape, is glued to the outside of the side elements 3. The sealing tape 6 is gas-tight. As a result, no air can penetrate into the area of the joint, i.e. into the area of the gap, from the outside. This ensures that weather influences and in particular oxygen cannot penetrate into the area of the joint. A concreted-in reinforcement, which is not shown here, is protected from the ingress of oxygen not only by the in-situ concrete covering it, but also by the side elements 3. The airtight sealing tape at least makes it more difficult for oxygen to penetrate into the area of the gap, even if the concrete poured in has not completely filled the gap between the two side elements 3.

Because the area of the gap is protected from the ingress of oxygen, the thickness of the side elements 3 can be fully taken into account when determining a concrete cover c, even in the areas where the side elements 3 are butted.

6 shows a partial sectional view of a further embodiment of the arrangement of formwork elements 1 according to the invention. The sealing tape 6 is not only arranged on the outside of the two adjacent side elements 3, but also extends over their upper surfaces. The entry of oxygen into the gap area is thus made considerably more difficult and - if at all - only conceivable at the point marked with an arrow.

7 shows a partial sectional view of a further embodiment of the arrangement of formwork elements 1 according to the invention. In the area of the joint between two adjacent side elements 3, the sealing tape 6 is not only arranged and glued on the outside and top of the side elements 3, but also on the inside by at least 5 mm or at least 10 mm or at least 15 mm downwards and also glued on the inside. When in-situ concrete is later poured in, a completely airtight seal on the top of the gap between the two side elements 3 is achieved if the top edge of the poured concrete is higher than the bottom edge of the sealing tape 6 glued on the inside. As a rule, the top edge of the poured concrete will be the same as the top edge of the side elements 3.

In addition, an optional U-shaped clamp profile 8 is placed on the area where the two side elements 3 meet. The clamp profile 8 serves to fix the two formwork elements 1 together. The clamp profile 8 can be cast in concrete after the formwork elements 1 have been fixed and remain as a lost element or removed before concreting.

8th shows a 7 corresponding perspective representation.

9 shows a partial sectional view of another embodiment of the arrangement of formwork elements 1 according to the invention. The side elements 3 are placed on a continuous layer of a sealing and formwork adhesive 7. The sealing and formwork adhesive 7 serves both to temporarily fix the formwork elements 1 on the component 2 arranged underneath, here a masonry crown. In addition, the sealing and formwork adhesive 7 serves to prevent an inflow of oxygen or the penetration of weather influences in the area of a gap between the adjacent side elements 3.

Analogous to the aforementioned embodiments, preventing the access of oxygen serves to prevent unwanted carbonation of the concrete in the formwork element 1.

10 shows a partial sectional view of a further embodiment of the arrangement of formwork elements 1 according to the invention. The side elements 3 are also placed on a continuous layer of a formwork adhesive 7, which serves to temporarily fix the formwork elements 1 on the component 2 arranged underneath, here a masonry crown, and to prevent an inflow of oxygen or the penetration of weather influences into the area of a gap between the adjacent side elements 3.

Analogous to the aforementioned embodiments, preventing the access of oxygen serves to prevent unwanted carbonation of the concrete in the formwork element 1 and thus subsequent damage to the reinforcement.

11a shows a schematic representation of a further embodiment of the arrangement of formwork elements 1 according to the invention. The side elements 3 and 3' each have two layers, each layer having a thickness of 4 mm. The total thickness of each side element 3 and 3' is therefore 8 mm. The two individual layers are offset from one another to form an overhang ü in such a way that when two adjacent formwork elements 1 are put together, they center each other.

11b shows a schematic representation of a further embodiment of the arrangement of formwork elements 1 according to the invention. The side elements 3 and 3' are each single-layered. The thickness of each side element 3 and 3' is 8mm. The ends of the side elements 3 and 3' have a step fold so that when two adjacent formwork elements 1 are put together, they center each other.

12 shows a schematic representation of an alternative embodiment of the arrangement of formwork elements 1 according to the invention. The joint of two side elements 3 shown is designed as a tongue and groove Construction designed so that when two adjacent formwork elements 1 are put together, they center each other.

LIST OF REFERENCE SYMBOLS

1

Formwork element

2

Component

3

first page element

3'

second page element

3"

third page element

4

inner space

5

Connecting element

5.V

first vertical leg

5.V'

second vertical leg

5.H

horizontal leg

5.1

edge flange

5.2

outer bridge

5.3

outer flange

5.4

inner bridge

5.5

Intermediate flange

6

Sealing tape

7

Formwork adhesive

8th

Bracket profile

B

Reinforcing element

S

screw

p.1

Milling ribs

a

Strength of page elements

b

Strength of the thighs

c

Concrete cover

ü

Got over

y

Element width

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions.

Cited patent literature

• DE 29917134 U1 [0004]
• DE 102015121810 A1 [0005]

Claims (15)

Formwork element (1) for producing a concrete component, comprising a connecting element (5) and a number of opposite side elements (3, 3') firmly connected thereto, wherein the connecting element (5) is U-shaped and has a lower horizontal leg (5.H), a first vertical leg (5.V) and a second vertical leg (S.V'), wherein the legs (5.V, 5.V') are directed upwards relative to the horizontal leg (5.H), wherein a first side element (3) is arranged on the outside of the first vertical leg (5.V) and a second side element (3') is arranged on the outside of the second vertical leg (5.V'), characterized in that - the side elements (3, 3') are made of non-combustible fiber concrete. Formwork element (1) according to Claim 1 , characterized in that the thickness (a) of the side elements (3, 3') is 7 mm or more. Formwork element (1) according to Claim 1 or 2 , characterized in that the thickness (b) of the vertical legs (5.V, 5.V') is 18 mm or more. Formwork element (1) according to one of the preceding claims, characterized in that the side elements (3, 3') have a projection ü of 7 mm relative to a lower edge of the horizontal leg (5.H) and that the thickness (b) of the horizontal leg (5.H) is 18 mm or more. Arrangement of a plurality of formwork elements (1) according to one of the preceding claims, characterized in that a gas-tight sealing strip (6) is arranged at a joint between two side elements (3, 3') of adjacent formwork elements (1). Arrangement according to Claim 5 , characterized in that the sealing strip (6) is arranged up to an upper edge of the adjacent side elements (3, 3') and on the inside of the side elements (3, 3') at least 5 mm downwards. Arrangement according to Claim 5 or 6 , characterized in that a formwork adhesive (7) is arranged under the lower edges of the side elements (3, 3'). Arrangement according to one of the Claims 5 until 7 , characterized in that in the region of the joint of the two side elements (3, 3') of adjacent formwork elements (1) formwork adhesive (7) is arranged between end faces of the abutting side elements (3, 3'). Arrangement according to one of the Claims 5 until 8th , characterized in that in the area of the joint between the two side elements (3, 3') of adjacent formwork elements (1), a U-shaped clamp profile (8) is attached to the top of both side elements (3, 3'). Arrangement according to one of the Claims 5 until 9 , characterized in that the sealing strip (6) is arranged at least 10 mm above an outer surface of a component (2) below the side elements (3, 3'). Arrangement according to one of the Claims 5 until 10 , characterized in that corresponding end faces of adjacent side elements (3, 3') of the formwork elements (1) have a tongue and groove formation, a step fold or an offset. Arrangement according to one of the Claims 5 until 11 , characterized in that the sealing tape (6) comprises a fabric. Arrangement according to one of the Claims 5 until 12 , characterized in that the sealing tape (6) is a butyl tape. Arrangement according to one of the Claims 5 until 7 and 9 until 12 , characterized in that in the region of the joint of the two side elements (3, 3') of adjacent formwork elements (1) a gap is arranged between end faces of the abutting side elements (3, 3'), the width of which gap is suitable for the inflow of a liquid fine fraction of a concrete to be introduced into the formwork elements. Arrangement according to Claim 14 , characterized in that spacer elements are arranged to define the gap.

Images