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EP-4735703-A1 - ELEMENT PANEL FOR PRODUCING A SEMIFINISHED PART COVER

EP4735703A1EP 4735703 A1EP4735703 A1EP 4735703A1EP-4735703-A1

Abstract

The invention relates to an element panel for producing a semifinished part cover, having a reinforced concrete board which has an element panel length along a direction of longitudinal extent and an element panel width along a transverse direction perpendicular to the direction of longitudinal extent, wherein the element panel length is greater than the element panel width, and at least a plurality of displacement devices project from the element panel surface, each of which has at least one hollow vessel the vessel opening of which is arranged in the concrete board and is sealed by the concrete of the concrete board. The element panel is characterised in that between adjacent hollow vessels, a channel extending in the transverse direction is formed in each case, into which a reinforcing bar can be inserted in the transverse direction in such a way that it projects laterally beyond the concrete board.

Inventors

  • PFEFFER, KARSTEN

Assignees

  • Unidome Deutschland GmbH

Dates

Publication Date
20260506
Application Date
20240701

Claims (20)

  1. 1. Element plate (1) for producing a semi-finished ceiling, comprising a reinforced concrete board (2) which has an element plate length (23) along a longitudinal direction and an element plate width (24) along a transverse direction perpendicular to the longitudinal direction, and from the upper side (10) of which several, in particular identical, displacement devices (3) protrude, each of which has at least one hollow vessel (4), the vessel opening (5) of which is arranged in the concrete board (2) and closed by the concrete of the concrete board (2), wherein the element plate (1) has several longitudinal reinforcement bars (22) running in the longitudinal direction, which are arranged at a distance from the upper side (10) of the concrete board (2), characterized in that between adjacent hollow vessels (4) a channel (14) running in the transverse direction is formed, into which a reinforcing bar (8) can be inserted in the transverse direction in such a way that it extends laterally over the concrete board (2) protrudes.
  2. 2. Element plate (1) according to claim 1, characterized in that the channels (14) are designed and arranged such that a plurality of reinforcing bars (8) can be inserted at equal distances such that a reinforcing bar (8) is arranged in each channel (14) running in the transverse direction and adjacent reinforcing bars (8) have a distance (17) of 40 cm or less, in particular at a distance (17) of 30 cm or less or at a distance (17) in the range from 15 to 30 cm or in the range from 20 cm to 25 cm or of 20 cm.
  3. 3. Element plate (1) according to claim 1 or 2, characterized in that the channels (14) each have a width (15) in the range of 3 cm to 10 cm, in particular in the range of 3 cm to 7 cm or in the range of 6 cm to 8 cm or of 5 cm.
  4. 4. Element plate (1) according to one of claims 1 to 3, characterized in that the longitudinal reinforcement bars (22) running in the longitudinal direction are arranged parallel to the upper side (10) of the concrete board (2).
  5. 5. Element plate (1) according to one of claims 1 to 4, characterized in that a. reinforcing elements (11) protrude from the concrete board 2, in particular designed as lattice girders, to which the longitudinal reinforcing bars (22) are fastened, or that b. reinforcing elements (11) protrude from the concrete board 2, in particular designed as lattice girders, to whose free ends the longitudinal reinforcing bars (22) are fastened.
  6. 6. Element plate (1) according to claim 5, characterized in that the reinforcing elements (11) are arranged in several straight and mutually parallel rows and that one of the longitudinal reinforcing bars (22) is fastened to the reinforcing elements (11) of a row.
  7. 7. Element plate (1) according to claim 6, characterized in that at least one row of reinforcing elements (11) runs between two straight and mutually parallel rows of displacement devices (3).
  8. 8. Element plate (1) according to one of claims 1 to 7, characterized in that a. the longitudinal reinforcement bars (22) extend over the entire element plate length or that a longitudinal reinforcement bar length of the longitudinal reinforcement bars (22) is 0.8 to 1.0 times, in particular 0.9 to 1.0 times, the element plate length, and/or that b. the element plate length (23) is greater than the element plate width (24).
  9. 9. Element plate (1) according to one of claims 1 to 8, characterized in that on the outside of at least one of two adjacent hollow vessels (4) at least one support element (6) with a support section (7) arranged outside the concrete board (2) for placing a reinforcing bar (8) is arranged, wherein the support section (7) has a distance (9) from the top side (10) of the concrete board (2) in the range of 0.5 cm to 3 cm, in particular in the range of 0.5 cm to 1.5 cm.
  10. 10. Element plate (1) according to claim 9, characterized in that the support element (6) is elongated and/or that the support element (6) is designed as a support rod, in particular a cylindrical one.
  11. 1 1. Element plate (1) according to claim 9 or 10, characterized in that the support section (7) has a concave shape and/or is concavely curved.
  12. 12. Element plate (1) according to one of claims 9 to 11, characterized in that the at least one support element (6) and the hollow vessel (4) are manufactured together in one piece, in particular by injection molding.
  13. 13. Element plate (1) according to one of claims 1 to 12, characterized in that at least one section of the wall of each hollow vessel (4), in particular at least one of the hollow vessels (4), is curved and/or that the wall of each hollow vessel (4), in particular at least one of the hollow vessels (4), has a curved, in particular circular section-shaped, section in a horizontal cross-sectional plane.
  14. 14. Element plate (1) according to one of claims 1 to 13, characterized in that the wall of each hollow vessel (4), in particular at least one of the hollow vessels (4), has at least one flat section.
  15. 15. Element plate (1) according to claim 14, characterized in that the flat section is arranged at an angle of 70 degrees to 90 degrees to the upper side (10) of the concrete board (2).
  16. 16. Element plate (1) according to one of claims 1 to 15, characterized in that the wall of each hollow vessel (4), in particular at least one of the hollow vessels (4), has a section parallel to the upper side (10) of the concrete board (2).
  17. 17. Element plate (1) according to one of claims 1 to 16, characterized in that a section of the wall of each hollow vessel (4), in particular at least one of the hollow vessels (4), has the shape of a spherical section.
  18. 18. Element plate (1) according to one of claims 1 to 17, characterized in that on the upper side of each hollow vessel (4), in particular at least one of the hollow vessels (4), at least one, in particular rib-shaped and/or web-shaped, spacer is arranged.
  19. 1. Element plate (1) according to one of claims 9 to 18, characterized in that a. the support element (6) is shorter in a direction, in particular perpendicular, away from the wall of the hollow vessel (4) than the length and the width of the vessel opening (5), and/or that b. the support element (6) is longer in a direction, in particular perpendicular, away from the wall of the hollow vessel (4) than half the distance between immediately adjacent displacement devices (3).
  20. 20. Element plate (1) according to one of claims 9 to 19, characterized in that the support element (6) protrudes, in particular vertically, from the wall of the hollow vessel (4).

Description

Element plate for producing a semi-prefabricated ceiling The invention relates to an element plate for producing a semi-finished ceiling, comprising a reinforced concrete board which has an element plate length along a longitudinal direction and an element plate width along a transverse direction perpendicular to the longitudinal direction, and from the upper side of which protrude a plurality of displacement devices, each of which has at least one hollow vessel, the vessel opening of which is arranged in the concrete board and is closed by the concrete of the concrete board, wherein the element plate has a plurality of longitudinal reinforcement bars running in the longitudinal direction, which are arranged at a distance from the upper side of the concrete board. The invention also relates to a semi-finished ceiling having a plurality of element panels and to a concrete component, in particular a concrete ceiling having a plurality of element panels. Furthermore, the invention relates to a method for producing an element plate and a method for producing a concrete component. Semi-precast ceilings are often used due to their advantages. They are assembled on site from prefabricated element panels and serve as part of a formwork that is filled with an additional layer of in-situ concrete to create the desired concrete ceiling. In the classic production of concrete ceilings using the pure in-situ concrete method, i.e. without the use of element panels for semi-prefabricated ceilings, displacement bodies are often arranged in the space surrounded by formwork where it is structurally possible. This has the advantage that the spaces occupied by the displacement bodies remain free of concrete, so that concrete is saved and lighter concrete ceilings can be produced. For example, in the European patent application EP 1 568 827 A1 it is proposed to lock displacement bodies, which are designed as plastic balls, for example, in lattices that are open on one side, and then to press these modules into a first or second layer of concrete, which may already contain a first reinforcement mat. The semi-finished product produced in this way is then covered with concrete mass during later completion. In the European patent application EP 0 617 180 A2 it is proposed to install in the space between metal grids protruding from a reinforced concrete slab of a floor, Box elements made of extruded foam sheets made of polypropylene and/or other suitable waterproof plastics, fixed along the entire length of this space with or without interruptions, to serve as load-relieving elements. The box elements are open at the bottom, provided with transverse closing walls and stiffening walls fixed by mortising and/or other suitable means. There are also known approaches to using displacement bodies in semi-prefabricated ceilings. For example, a construction element and a method for its production are known from DE 603 09 733 T2. The construction element has a "hardened concrete layer", which can also be referred to as a concrete board, as well as reinforcing elements, with the reinforcing elements partially extending upwards from the hardened concrete layer. The construction element also has elements that define cavities, which can in particular have the shape of an inverted flowerpot. With regard to the stability of a concrete slab constructed using element slabs, the transition areas from one element slab to the immediately next one are particularly critical. It is therefore the object of the present invention to provide an element panel which makes it possible to save concrete and to produce particularly stable concrete ceilings, in particular flat ceilings. The object is achieved by an element plate which is characterized in that a transversely running groove is formed between adjacent hollow vessels, into which a reinforcing bar can be inserted in the transverse direction in such a way that it projects laterally beyond the concrete board. In a particularly advantageous embodiment, the channels are designed and arranged in such a way that several reinforcing bars can be inserted at equal distances such that a reinforcing bar is arranged in each channel running in the transverse direction and adjacent reinforcing bars are spaced apart by 40 cm or less, in particular in a distance in the range of 15 to 30 cm or in the range of 20 cm to 25 cm or 20 cm. This advantageously makes it possible to arrange the reinforcing bars across the element plates in a number and density that is advantageous for the stability of the concrete component to be produced when producing a concrete component, in particular a concrete ceiling, using several of the element plates according to the invention, which are arranged along their long sides, in particular directly next to one another. Preferably, the channels each have a width in the range of 3 cm to 10 cm, in particular in the range of 3 cm to 7 cm or in the range of 6 cm to 8 cm or 5 cm. The special spaci