Multi-layer component for a roof, method for producing a multi-layer component, and use of textile-reinforced concrete strips

Abstract

The invention relates to a multi-layer component (1) for a roof, having at least three layers (2, 3, 4) arranged one over the other. A first layer (2) is formed with a first shell (5), and a second layer (3) is formed with a second shell (6), wherein at least one textile-reinforced concrete strip (7, 8) with at least one textile reinforcement runs in an intermediate layer (4) formed between the first layer (2) and the second layer (3), and the course of the at least one textile-reinforced concrete strip (7, 8) is shaped such that the thickness (14) of the intermediate layer (4) can thus be adjusted and at least one cavity (9) is formed in the intermediate layer (4).

Description

[0001] Multi-layer structural element for a ceiling, method for producing a multi-layer structural element and use of textile-reinforced concrete strips

[0002] The invention relates to a multi-layer structural element for a (concrete) ceiling. Furthermore, a method for producing a multi-layer structural element and the use of extruded and formed textile-reinforced concrete strips are specified. The invention can be used particularly advantageously for providing lightweight concrete ceilings. The invention can contribute to the provision of a ceiling element with or made of modular extruded components.

[0003] Ceiling elements for concrete ceilings are often made of reinforced concrete to ensure sufficient load-bearing capacity. Similarly, structural elements for concrete walls are often made of reinforced concrete. Steel typically has a density of approximately 7.85 kg / cm³. 3[kilograms per cubic centimeter] and a tensile strength of approximately 500 MPa [megapascals]. This ensures the sufficient load-bearing capacity of such manufactured elements and structures. However, a well-known disadvantage of such elements and structures is their typically high weight. Furthermore, corrosion of the steel reinforcement can occur over time.

[0004] Currently, steel is being replaced in the latest applications by textiles such as carbon textiles or rods, which have an advantageously high tensile strength of up to 4000 MPa and a density of approximately 1.78 kg / cm 3 The use of textiles instead of steel can thus enable lighter yet sufficiently stable textile-reinforced concrete elements. Furthermore, the carbon is inert and not susceptible to corrosion like conventional structural steel.

[0005] However, it has been shown that simply replacing the steel reinforcement with textile reinforcement is not sufficient to utilize the full potential of textile-reinforced concrete, and in particular carbon-reinforced concrete. Based on this, the object of the invention is to at least partially solve the problems described with reference to the prior art. In particular, a structural element and a manufacturing method are to be provided, each of which contributes to the provision of concrete structures in a way that minimizes material use and / or weight, while still remaining sufficiently stable. Furthermore, the structural elements should advantageously be quickly available.

[0006] These objects are achieved with a multilayer component, a method, and a use according to the features of the respective independent patent claims. Further advantageous embodiments of the invention are specified in the dependent patent claims. It should be noted that the features listed individually in the dependent patent claims can be combined with one another in any technologically expedient manner and define further embodiments of the invention. Furthermore, the features listed in the patent claims are further specified and explained in the description, with further preferred embodiments of the invention being presented.

[0007] A multi-layer structural element for a (concrete) ceiling contributes to this, comprising at least three layers arranged one above the other, wherein a first layer is formed with a first shell and a second layer is formed with a second shell, wherein at least one textile concrete strip with at least one textile reinforcement runs in an intermediate layer formed between the first layer and the second layer and wherein the course of the at least one textile concrete strip is shaped such that a layer thickness of the intermediate layer can be adjusted and that at least one cavity is formed in the intermediate layer.

[0008] The multi-layer building element is suitable for providing a ceiling, in particular a concrete ceiling. For example, several building elements can be arranged next to one another and connected to one another to create a (concrete) ceiling. Furthermore, the multi-layer building element can also be used for (concrete) walls or (concrete) floors or (concrete) floor slabs. For example, the building element can also be used in walls, such as basement walls. However, the multi-layer building element is preferably a multi-layer ceiling element. Alternatively or cumulatively, the multi-layer building element can be a modular, multi-layer building element. In particular, the individual layers can be provided or can be provided in a modular manner. In other words, this can be described in particular as meaning that the multi-layer building element can be formed in a modular manner.In particular, the first shell and / or the second shell and / or the at least one textile concrete strip can be provided modularly.

[0009] The structural element comprises at least three layers arranged one above the other. As a rule, the first layer is arranged below the intermediate layer and below the second layer. In particular, the intermediate layer is arranged vertically between the first layer and the second layer. In principle, more than three layers can be present or formed. For example, a fourth or fifth layer can also be formed. In this context, the fourth layer can also represent an intermediate layer, for example, in which at least one textile-reinforced concrete strip with at least one textile reinforcement runs according to the solution presented here. The fifth layer can be formed with a third shell.

[0010] The structural element comprises a first layer comprising a first shell and a second layer comprising a second shell. The first shell may be in the form of a plate. The second shell may be in the form of a plate. A plate is understood here in particular to be an element whose thickness or height is significantly less (at least twice less) than its length and / or width. The first shell and / or the second shell may (each) be formed with concrete. Preferably, the first shell and / or the second shell may (each) be formed at least partially (or completely) with textile concrete. Carbon concrete or carbon fiber reinforced concrete can be used particularly advantageously as textile concrete. The first shell and / or the second shell may (each) be cast or extruded.For example, at least the first shell or the second shell can be formed as textile concrete with at least one textile reinforcement. The textile reinforcement can be formed at least partially with fibers made of glass, aramid, basalt, or carbon. The textile reinforcement is preferably formed at least partially with carbon or carbon fibers. The textile reinforcement can be provided in the form of a prefabricated, in particular pre-impregnated grid. The textile reinforcement can, for example, be provided as a flexible, pre-impregnated textile. A polymer material can advantageously be used as the impregnation. For example, styrene-butadiene rubber (SBR) can be used for flexible impregnation. Several textile reinforcements, such as at least two or exactly two textile reinforcements, can be arranged in at least the first shell or the second shell.For example, in at least the first shell or the second shell, an upper textile reinforcement and a lower textile reinforcement can be arranged one above the other. This can advantageously contribute to better absorption of the tensile forces that occur on both the bottom and top sides of the shell.

[0011] In an intermediate layer formed between the first layer and the second layer, there runs at least one textile concrete strip with at least one textile reinforcement. The textile concrete strip can, for example, be formed as a carbon concrete strip or as concrete reinforced with carbon fibers. The textile reinforcement can be formed at least partially with fibers made of glass, aramid, basalt or carbon. The textile reinforcement is preferably formed at least partially with carbon or with carbon fibers. The textile reinforcement can be provided in the form of a prefabricated, in particular pre-impregnated grid. The textile reinforcement can, for example, be provided as a flexible, pre-impregnated textile. For flexible impregnation, styrene-butadiene rubber (SBR), for example, can be used. In at least one or more of the textile concrete strips,Multiple textile reinforcements, such as at least two or exactly two textile reinforcements, can be arranged. In at least one or more of the textile-reinforced concrete strips, for example, an upper textile reinforcement and a lower textile reinforcement can be arranged one above the other. This can advantageously contribute to better absorption of the tensile forces that occur on both the bottom and top sides of the strip.

[0012] The course of the at least one textile concrete strip is shaped in such a way that a layer thickness of the intermediate layer can be adjusted and that at least one cavity is formed in the intermediate layer. The at least one textile concrete strip can (for this purpose) be curved or run with at least one arc through the intermediate layer. The at least one textile concrete strip can run curved around at least one axis extending parallel to the layers. The course refers in particular to the extension of the strip along its longitudinal direction. For example, it can be provided (alternatively or cumulatively) that at least one of the textile concrete strips has the shape of a particularly straight bar with, for example, a square or W-profile cross-section. Furthermore, the course of the textile concrete strip can, for example, describe the shape of a W-profile.

[0013] In particular, the at least one textile-reinforced concrete strip is a deformed textile-reinforced concrete strip. Preferably, the at least one textile-reinforced concrete strip is a deformed textile-reinforced concrete strip to adjust its contour. In other words, this can also be described in particular as the textile-reinforced concrete strip being first shaped, such as extruded, and then deformed to form its contour. The cavity can be at least partially filled with an insulating material and / or form or contain a channel for cables or pipes. However, it is generally not intended that the cavity be filled with heavy fillers, such as concrete.

[0014] The structural element described here can advantageously enable the construction of ceiling structures that are significantly lighter than reinforced concrete ceilings. In particular, such ceilings can be approximately 80% lighter than reinforced concrete. In an advantageous embodiment, the structural element described here can utilize the advantageous material properties of carbon concrete in combination with an extrusion process to enable a completely new construction method for ceiling structures with minimal material usage.

[0015] According to an advantageous embodiment, it is proposed that the at least one textile-reinforced concrete strip runs in a meandering or undulating manner within the intermediate layer. The textile-reinforced concrete strip can form one or more wave crests and one or more wave troughs. Load introduction areas can be formed in the area of ​​the wave crests and / or wave troughs. In the area of ​​the wave crests and / or wave troughs, the at least one textile-reinforced concrete strip and the shells can be connected to one another, such as by adhesive bonding or screwing.

[0016] The course of the at least one textile-reinforced concrete strip can, for example, have or describe at least one predefinable curvature and / or bend. The at least one textile-reinforced concrete strip can be curved or bent around at least one axis extending parallel to the layers. For example, at least one maximum of the course can be connected to one of the shells and at least one minimum of the course can be connected to or contact an opposite one of the shells. For example, according to an advantageous embodiment, the course of the at least one textile-reinforced concrete strip can be (re)shaped such that the (respective) textile-reinforced concrete strip or its course describes or follows at least one parabola.

[0017] According to a further advantageous embodiment, the course of the at least one textile-reinforced concrete strip can, for example, be (re)shaped such that the (respective) textile-reinforced concrete strip or its course describes or follows a catenary line. In particular, the course of the at least one textile-reinforced concrete strip can, for example, be (re)shaped such that a load introduced into the textile-reinforced concrete strip can be or is transferable with the lowest possible moment. For this purpose, a course that essentially follows a catenary line is particularly advantageous. A catenary (also rope curve, catenoid or chain curve; English: catenary or funicular curve) is a mathematical curve that describes the sag of a chain suspended at its ends under the influence of gravity. It is an elementary mathematical function, the hyperbolic cosine.The course of at least one textile-reinforced concrete strip can (thus) describe or follow a hyperbolic cosine, for example.

[0018] According to a further advantageous embodiment, it is proposed that the at least one textile concrete strip comprises at least a first textile concrete strip and a second textile concrete strip, wherein the first textile concrete strip and the second textile concrete strip run transversely to one another in the intermediate layer. In particular, the first textile concrete strip and the second textile concrete strip can run perpendicularly to one another in the intermediate layer. In this context, it is particularly advantageous if at least a plurality of first textile concrete strips running parallel to one another at a predefinable first distance from one another, or a plurality of second textile concrete strips running parallel to one another at a predefinable second distance from one another, are arranged in the intermediate layer.

[0019] According to a further advantageous embodiment, it is proposed that the textile-reinforced concrete strips each extend in a wave-like manner in the intermediate layer, with at least one wave trough of one of the textile-reinforced concrete strips and a wave crest of another of the textile-reinforced concrete strips overlapping each other. For example, several or all (internal, i.e., not ending at an edge region) wave troughs of one of the textile-reinforced concrete strips can each be arranged so as to overlap a wave crest of another of the textile-reinforced concrete strips. The textile-reinforced concrete strips can, in particular, be arranged and aligned in the manner of a wickerwork or a woven mesh.

[0020] According to a further advantageous embodiment, it is proposed that the textile-reinforced concrete strips are extruded together with their textile reinforcement. This extrusion can advantageously enable rapid production of the structural elements on a plant scale.

[0021] According to a further aspect, a method for producing a multi-layer structural element is specified, comprising at least the following steps: a) providing a first shell, b) providing at least one textile concrete strip by jointly extruding concrete with at least one textile reinforcement, c) forming the at least one extruded textile concrete strip, d) arranging the at least one formed textile concrete strip on the first shell, e) providing a second shell and arranging the second shell on the at least one textile concrete strip.

[0022] The specified order of steps a), b), and c) is exemplary and can, for example, be performed at least once in the specified order to carry out the method. Furthermore, at least some of steps a), b), c), d), and e), in particular the provision according to steps a), b), and e), can be performed at least partially in parallel or simultaneously.

[0023] The method can be carried out to produce a multilayer component described here. In series production, the method can be repeated many times to produce a large number of corresponding components. The method can preferably be carried out at least partially automated.

[0024] The forming process according to step c) can be carried out such that the at least one extruded textile-reinforced concrete strip extends in a meandering or undulating manner. In step d), two different, each extruded and formed textile-reinforced concrete strips can be arranged transversely to each other on the first shell. The different, each extruded and formed textile-reinforced concrete strips can, for example, form a structure for the intermediate layer. The structure can advantageously be formed symmetrically. The structure can be formed in the manner of a wickerwork or represent a woven mesh.

[0025] The details, features, and advantageous embodiments discussed in connection with the structural element can also occur in the method presented here, and vice versa. In this respect, reference is made in full to the explanations therein for a more detailed characterization of the features. According to a further aspect, the use of extruded and formed textile-reinforced concrete strips with textile carbon reinforcement for the spaced connection of two shells of a multi-layer concrete structural element is specified.

[0026] The details, features, and advantageous embodiments discussed in connection with the component and / or method may also occur in the application presented here, and vice versa. In this respect, reference is made in full to the explanations therein for a more detailed characterization of the features.

[0027] As a precaution, it should be noted that the numerals used here ("first", "second", ...) primarily serve (only) to distinguish between several similar objects, quantities, or processes, and therefore do not necessarily prescribe any interdependence and / or sequence of these objects, quantities, or processes. Should a dependence and / or sequence be necessary, this is explicitly stated here or will be obvious to the person skilled in the art upon studying the specifically described embodiment. To the extent that a component can occur multiple times ("at least one"), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.

[0028] The invention and the technical environment are explained in more detail below with reference to the figures. It should be noted that the figures show particularly preferred embodiments of the invention, but the invention is not limited thereto. Identical components in the figures are provided with the same reference numerals. They show, by way of example and schematically:

[0029] Fig. 1 : a variant of a multi-layer component described here in a partially sectioned, perspective view, and

[0030] Fig. 2: A further embodiment of a multi-layer structural element described here, shown in a sectional side view. Fig. 1 schematically shows an example of a multi-layer structural element 1 described here for a concrete ceiling. The structural element 1 has at least three layers 2, 3, 4 arranged one above the other, with a first layer 2 being formed by a first shell 5 and a second layer 3 being formed by a second shell 6.

[0031] For example, the first layer 2 and the second layer 3 can be formed in the form of slabs. In one exemplary embodiment, two flat, parallel textile-reinforced concrete slabs can thus be located on the outside. The thickness (height) of the first shell 2 can define a first layer thickness 15. The thickness (height) of the second shell 3 can define a second layer thickness 16. The slabs or shells 2, 3 can, for example, have a thickness of (only) approximately 3 cm [centimeters] and thus define a corresponding dimension for the first layer thickness 15 and the second layer thickness 16.

[0032] For example, the first shell 5 and / or the second shell 6 can be formed as textile-reinforced concrete with at least one textile reinforcement. For example, the first shell 5 and / or the second shell 6 can each contain two or more layers of textile reinforcement. The textile reinforcement can be formed with carbon. Carbon concrete can thus be used as an example and preferably as textile-reinforced concrete for the first shell 5 and / or the second shell 6.

[0033] At least one textile-reinforced concrete strip 7, 8 with at least one textile reinforcement runs in an intermediate layer 4 formed between the first layer 2 and the second layer 3. The textile-reinforced concrete strips 7, 8 are, for example, shaped (extruded) such that they have a strip width 17 of approximately 6 cm and a thickness or height of approximately 1 cm. The textile-reinforced concrete strips 7, 8, for example, have two layers of textile reinforcement. The textile-reinforced concrete strips 7, 8 can be glued or screwed to the supporting surfaces of the shells 5, 6, which are designed here as textile-reinforced concrete panels.

[0034] The course of the at least one textile-reinforced concrete strip 7, 8 is shaped such that a layer thickness 14 of the intermediate layer 4 can be adjusted and such that at least one cavity 9 is formed in the intermediate layer 4. The layer thickness 14 of the intermediate layer 4 can, for example, be adjusted such that it has a (clear) height of approximately 24 cm. Materials for thermal or sound insulation and / or cables and pipes can be integrated into the at least one cavity 9, for example.

[0035] 1 shows by way of example that and, if applicable, how the at least one textile concrete strip 7, 8 can run in a meandering or undulating manner in the intermediate layer 4. For example, the at least one textile concrete strip 7, 8 can comprise at least a first textile concrete strip 7 and a second textile concrete strip 8. The first textile concrete strip 7 and the second textile concrete strip 8 can run transversely to one another in the intermediate layer 4, as can be seen in particular from the perspective view according to FIG. 1. In principle, the course shown in the figures as well as the arrangement and orientation of the textile concrete strips 7, 8 are examples. For example, the textile concrete strips 7, 8 could (alternatively) also be arranged or aligned rotated by 90 degrees.

[0036] For example, several first textile concrete strips 7 running parallel to one another at a predefinable first distance 10 and / or several second textile concrete strips 8 running parallel to one another at a predefinable second distance 11 can be arranged in the intermediate layer 4. Only by way of example, three first textile concrete strips 7 and three second textile concrete strips 8 are shown in the illustration according to Fig. 1. Of course, significantly more first textile concrete strips 7 and second textile concrete strips 8 are also possible, particularly depending on the selected dimension of the structural element 1.

[0037] 1 further shows by way of example that and, if appropriate, how the textile concrete strips 7, 8 can each run in a wave-like manner in the intermediate layer 4. In this case, at least one wave trough 12 of one of the textile concrete strips 7 and a wave crest 13 of another of the textile concrete strips 8 can preferably overlap one another. By way of example, as can also be seen in Fig. 1, several or all of the (internal, i.e. not ending at an edge region) wave troughs 12 of one of the textile concrete strips 7, 8 can each be arranged so as to overlap a wave crest 13 of another of the textile concrete strips 8, 7. Fig. 2 shows, by way of example, a section through a multi-layer structural element 1, such as is shown in Fig. 1. In the structural element 1 according to Fig. 1, the section would run parallel to the element width 19 and transverse to the element length 18.

[0038] Fig. 2 shows, by way of example, that the wave troughs 12 and wave crests 13 can also function as load introduction regions 20. A (vertical) load acting, for example, on the second layer 3 or the second shell 6 can be introduced into the structure of the intermediate layer 4 formed by the textile-reinforced concrete strips 7, 8 via the wave crests 13. The load introduced into the structure of the intermediate layer 4 formed by the textile-reinforced concrete strips 7, 8 can be introduced into or diverted from the first layer 2 or the first shell 5 via the wave troughs 12. The load introduction regions 20 can preferably be at least partially adapted to typical operating loads of the structural element 1. In particular, to form a respective load introduction region 20, a contact surface can be formed between the first shell 5 and a section of one of the textile concrete strips 7, 8 or between the second shell 5 and a section of one of the textile concrete strips 7, 8.The contact surface, in particular its dimensions, can be adapted to typical operating loads of the component 1.

[0039] Preferably, the textile-reinforced concrete strips 7, 8 can each be extruded together with their textile reinforcement. This can contribute to significantly improving the efficiency of the manufacturing process for the structural element 1. Thus, the structural element 1 can advantageously be used to provide a ceiling element using modular extrusion components. The ceiling element can be a cavity ceiling element.

[0040] To produce a multi-layer structural element 1, the following procedure can be followed, for example: A first shell 5 can be provided. At least one textile concrete strip 7, 8 can be provided by extruding concrete together with at least one textile reinforcement. The at least one extruded textile concrete strip 7, 8 can be formed. The at least one formed textile concrete strip 7, 8 can be arranged on the first shell 5. A second shell 6 can be provided and the second shell 6 can be arranged on the at least one textile concrete strip 7, 8.

[0041] The described method can be used to produce a multilayer structural element 1, which is also described here. For example, the forming can be carried out such that the at least one extruded textile-reinforced concrete strip 7, 8 runs in a meandering or undulating manner. The forming can preferably be carried out such that the respective textile-reinforced concrete strip 7, 8 describes or has the shape of a parabola or catenary line.

[0042] The illustrations in Figures 1 and 2 also illustrate an advantageous use of extruded and formed textile concrete strips 7, 8 with textile carbon reinforcement for the spaced connection of two shells 5, 6 of a multi-layer concrete structural element 1.

[0043] In an exemplary embodiment, the structural element 1 can contribute to the provision of a (modular) ceiling element. The structural element 1 can comprise two panels made of textile-reinforced concrete with two layers of textile reinforcement as shells 5, 6. Extruded, multi-layered, particularly two-layer reinforced textile-reinforced concrete strips 7, 8 can be installed between the panels, which were formed immediately after production.

[0044] The resulting formed textile-reinforced concrete strips 7, 8 can be arranged symmetrically between the two plates or shells 5, 6. In the formed state, the textile-reinforced concrete strips 7, 8 can define a predeterminable clearance height. The connection between the formed textile-reinforced concrete strips 7, 8 and the plates or shells 5, 6 can be achieved, for example, using a two-component adhesive or a sleeve-screw connection.

[0045] All parts of the ceiling element or building element 1, in particular at least the textile-reinforced concrete strips 7, 8, can be manufactured using an extruder, thereby enabling faster production, and can be assembled modularly at the desired location. In particular, the ceiling element or building element 1 does not have to be manufactured as a whole. Due to the advantageously shaped textile-reinforced concrete strips 7, 8, low material thicknesses can advantageously be achieved, in particular in the intermediate layer 4. At the same time, a higher tensile strength can advantageously be achieved through the textile reinforcement, such as through multi-layer textile reinforcement (for example: two layers). Thus, with the building element 1 described here and the method described here, the material expenditure can be advantageously reduced and thus weight can be saved.

[0046] A ceiling constructed accordingly can advantageously save approximately 80% weight compared to a conventional reinforced concrete ceiling.

[0047] Thus, a multi-layer (modular) structural element 1 and a method for producing a multi-layer (modular) structural element 1 are provided, which can at least partially solve the problems described with reference to the prior art. In particular, a structural element 1 and a manufacturing method can be provided here, each of which contributes to the provision of concrete structures with the least possible use of materials and / or weight, while still being sufficiently stable. Furthermore, the structural elements 1 can advantageously be provided quickly.

[0048] List of reference symbols

[0049] 1 component

[0050] 2 first layer

[0051] 3 second layer

[0052] 4 Intermediate layer

[0053] 5 first bowl

[0054] 6 second bowl

[0055] 7 textile concrete strips

[0056] 8 textile concrete strips

[0057] 9 Cavity

[0058] 10 first distance

[0059] 11 second distance

[0060] 12 wave trough

[0061] 13 Wellenberg

[0062] 14 Layer thickness

[0063] 15 layer thickness

[0064] 16 layer thickness

[0065] 17 stripes wide

[0066] 18 element length

[0067] 19 Element width

[0068] 20 Load introduction area

Claims

Claims Multi-layer structural element (1) for a ceiling, comprising at least three layers (2, 3, 4) arranged one above the other, wherein a first layer (2) is formed with a first shell (5) and a second layer (3) is formed with a second shell (6), wherein at least one textile-reinforced concrete strip (7, 8) with at least one textile reinforcement runs in an intermediate layer (4) formed between the first layer (2) and the second layer (3), and wherein the course of the at least one textile-reinforced concrete strip (7, 8) is shaped such that a layer thickness (14) of the intermediate layer (4) can be adjusted and that at least one cavity (9) is formed in the intermediate layer (4). Structural element (1) according to claim 1, wherein the at least one textile-reinforced concrete strip (7, 8) runs in a meandering or undulating manner in the intermediate layer (4).The structural element (1) according to claim 1 or 2, wherein the at least one textile-reinforced concrete strip (7, 8) comprises at least a first textile-reinforced concrete strip (7) and a second textile-reinforced concrete strip (8), and wherein the first textile-reinforced concrete strip (7) and the second textile-reinforced concrete strip (8) extend transversely to one another in the intermediate layer (4). Structural element (1) according to claim 3, wherein at least a plurality of first textile-reinforced strips (7) extending parallel to one another at a predefinable first distance (10) or a plurality of second textile-reinforced strips (8) extending parallel to one another at a predefinable second distance (11) are arranged in the intermediate layer (4). Construction element (1) according to one of the preceding claims, wherein the textile concrete strips (7, 8) each run in a wave-like manner in the intermediate layer (4) and wherein at least one wave trough (12) of one of the textile concrete strips (7) and a wave crest (13) of another of the textile concrete strips (8) overlap one another.A structural element (1) according to one of the preceding claims, wherein the textile-reinforced concrete strips (7, 8) are each extruded together with their textile reinforcement. A method for producing a multi-layer structural element (1), comprising at least the following steps: a) providing a first shell (5), b) providing at least one textile-reinforced concrete strip (7, 8) by extruding concrete together with at least one textile reinforcement, c) forming the at least one extruded textile-reinforced concrete strip (7, 8), d) arranging the at least one formed textile-reinforced concrete strip (7, 8) on the first shell (5), e) providing a second shell (6) and arranging the second shell (6) on the at least one textile-reinforced concrete strip (7, 8). A method according to claim 7, wherein the method for producing a multi-layer structural element (1) is carried out according to one of claims 1 to 6.The method according to claim 7 or 8, wherein the forming according to step c) is carried out such that the at least one extruded textile-reinforced concrete strip (7, 8) extends in a meandering or undulating manner. Use of extruded and formed textile-reinforced concrete strips (7, 8) with textile carbon reinforcement for the spaced-apart connection of two shells (5, 6) of a multi-layer concrete structural element (1).

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