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DE-102025145335-A1 - Multi-layer ceiling panel for a building ceiling, building and method for manufacturing a multi-layer ceiling panel

DE102025145335A1DE 102025145335 A1DE102025145335 A1DE 102025145335A1DE-102025145335-A1

Abstract

A multi-layer ceiling panel (3) for a building ceiling comprises a wood material layer (6) and a concrete material layer (7) with reinforcement (13), wherein the reinforcement (13) includes at least one prestressed strand (16) for forming prestressed concrete. Furthermore, a method for producing the multi-layer ceiling panel (3) is described.

Inventors

  • Erfinder auf Antrag nicht genannt.

Assignees

  • VEIT DENNERT K.G. BAUSTOFFBETRIEBE

Dates

Publication Date
20260513
Application Date
20251104
Priority Date
20241111

Claims (15)

  1. Multi-layer ceiling panel (3) for a building ceiling, comprising 1.1 a wood material layer (6) and 1.2 a concrete material layer (7) with reinforcement (13) characterized in that 1.3 the reinforcement (13) comprises at least one prestressed prestressing strand (18) for forming prestressed concrete.
  2. Multilayer ceiling panel (3) according to Claim 1 , characterized by a positive locking profile (18) between the wood material layer (6) and the concrete material layer (7).
  3. Multilayer ceiling panel (3) according to Claim 2 , characterized in that the at least one tension strand (16) is arranged in the positive locking profile (18).
  4. Multilayer ceiling panel (3) according to Claim 2 or 3 , characterized in that the positive locking profile (18) has at least one groove (17) in particular in the wood material layer (6).
  5. Multilayer ceiling panel (3) according to Claim 4 , characterized in that the at least one groove (17) has an undercut, in particular a widening (22), in the longitudinal direction (21) of the groove.
  6. Multilayer ceiling panel (3) according to Claim 4 or 5 , characterized in that the at least one tension strand (16) is arranged within the at least one groove (17) formed in the wood material layer (6).
  7. Multilayer ceiling panel (3) according to one of the Claims 2 until 6 , characterized in that the form-fitting profile (18), in particular the at least one groove (17), forms an undercut in the plate orthogonal direction (20).
  8. Multilayer ceiling panel (3) according to one of the preceding claims, characterized by a three-dimensional reinforcement (13).
  9. Multi-layer ceiling slab (3) according to one of the preceding claims, characterized in that the reinforcement (13) extends into the form-fitting profile (18) and/or into the plate-shaped area (23) of the concrete material layer (7).
  10. Multi-layer ceiling slab (3) according to one of the preceding claims, characterized by a design as a semi-precast ceiling, wherein the concrete material layer (7) is produced at least partially as cast-in-place concrete.
  11. Multilayer ceiling panel (3) according to one of the preceding claims, characterized in that the wood material layer (6) and/or the concrete material layer (7) each extend over at least 80% of the main extension plane (8) of the multilayer ceiling panel (3).
  12. Multi-layer ceiling panel (3) according to one of the preceding claims, characterized in that the surface (9) of the wood material layer (6) adjacent to the concrete material layer (7) is made water-transport-inhibiting, in particular hydrophobic.
  13. Building (1), comprising 13.1 several building walls (2.1, 2.2), and 13.2 at least one multi-layer ceiling panel (3) on the building walls (2.1, 2.2) according to one of the Claims 1 until 12 .
  14. Method for producing a multi-layer ceiling panel (3), in particular according to one of the Claims 1 until 12 , comprising the steps: 14.1 Providing a layer of wood material (6), 14.2 Arranging reinforcement (13) on the layer of wood material (6), 14.3 Tensioning at least one prestressing strand (16) of the reinforcement (13) and 14.4 Pouring concrete onto the layer of wood material (6) and the reinforcement (13) to form prestressed concrete.
  15. Procedure according to Claim 14 , characterized by pouring cast-in-place concrete onto the concrete material layer (7).

Description

The invention relates to a multi-layer ceiling panel for a building ceiling. Furthermore, the invention relates to a building with such a multi-layer ceiling panel. The invention also relates to a method for manufacturing a multi-layer ceiling panel. From the WO 2022/232 851 A1 A multi-layer ceiling panel is known. A disadvantage is that such a multi-layer ceiling panel is complex to manufacture and requires improvement with regard to material usage, transport costs, and strength. The invention is based on the objective of providing an improved multi-layer ceiling panel for a building ceiling, which is particularly robust in use, has a low weight, and is particularly economical to manufacture, transport and assemble. This problem is solved by a multi-layer ceiling panel with the features of claim 1. It has been recognized that a multi-layer ceiling panel for a building ceiling can have at least one prestressed tendon strand for forming prestressed concrete, thereby increasing the strength of the multi-layer ceiling panel, reducing its weight, saving material, and reducing transport and installation costs. The at least one tendon strand is preferably arranged in the lower region, particularly in the lower half, and especially in the lower third, of the concrete material layer, particularly of the multi-layer ceiling panel. This allows tensile forces due to bending loads, especially under the self-weight of the multi-layer ceiling panel, to be compensated. Contrary to expectations, prestressing does not lead to increased stress in the interface between the wood and concrete layers, which should be avoided as much as possible. While increased forces do initially occur in the contact area between the wood and concrete layers, particularly immediately after fabrication, these forces are significantly reduced when the multi-layer floor slab is laid on the building walls, resulting in lower stresses than would occur without prestressing. Thus, not only is the concrete layer relieved of stress, but also the relevant contact area between the wood and concrete layers. The tension of the at least one prestressing strand is preferably determined and adjusted such that the stress on the multilayer ceiling panel when resting on edge supports, particularly the building walls, is especially low. For this purpose, the prestressing can be determined taking into account the installation situation and/or the length and/or width and/or thickness of the multilayer ceiling panel. Preferably, the multi-layer ceiling panel comprises at least two, in particular at least three, in particular at least four, in particular at least five, and/or a maximum of 20, in particular separately tensionable, prestressing strands. This ensures a particularly uniform stress distribution. The connection between the concrete layer and the wood layer is preferably made by pouring the concrete onto the wood layer. For improved bond strength, connecting elements can bridge the concrete and wood layers, for example, pin-shaped connecting elements such as nails and/or screws, which can be inserted into the wood layer before the concrete is poured, preferably at an angle, and protrude from the wood layer to connect it to the concrete layer. The wood material layer preferably has a wood content of at least 70%, in particular at least 80%, in particular at least 90%, in particular at least 95%, in particular 100%, especially by volume. Furthermore, the wood material layer may comprise a matrix material and/or an adhesive and/or wood glue and/or a decorative layer. The wood material layer can consist of at least one, in particular several, plywood panels and/or OSB panels and/or laminated wood panels and/or chipboard and/or veneers. The multi-layer ceiling panel can consist solely of the wood material layer and the concrete material layer. Alternatively, the multi-layer ceiling panel can have additional layers, for example, an insulation material layer. The volume fraction of the insulation material layer in the multi-layer ceiling panel is preferably a maximum of 60%, more particularly a maximum of 40%, and more particularly a maximum of 20%, and/or a minimum of 10%. The concrete material layer may contain a filler, in particular a foamed material, in particular expanded glass, in particular to a volume fraction of at least 10%, in particular at least 20%, in particular a maximum of 60%. The concrete used is preferably low-shrinkage concrete. Preferably, the at least one prestressing strand is connected to the concrete layer by immediate bonding. Alternatively, the connection to the concrete can be made by subsequent bonding and/or without bonding. The bearing surface for placing the multi-layer ceiling panel on the building walls is preferably provided by the wood material layer, or alternatively by the concrete material layer. The reinforcement can comprise at least one reinforcing steel mesh and/or a support cage and/or the prestressing strand. The suppor