EP4234828A2 - Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication - Google Patents

Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication Download PDF

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Publication number
EP4234828A2
EP4234828A2 EP23177243.5A EP23177243A EP4234828A2 EP 4234828 A2 EP4234828 A2 EP 4234828A2 EP 23177243 A EP23177243 A EP 23177243A EP 4234828 A2 EP4234828 A2 EP 4234828A2
Authority
EP
European Patent Office
Prior art keywords
thermal insulation
building
insulation element
concrete
base body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23177243.5A
Other languages
German (de)
English (en)
Other versions
EP4234828A3 (fr
Inventor
Martin Fenchel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schoeck Bauteile GmbH
Original Assignee
Schoeck Bauteile GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schoeck Bauteile GmbH filed Critical Schoeck Bauteile GmbH
Publication of EP4234828A2 publication Critical patent/EP4234828A2/fr
Publication of EP4234828A3 publication Critical patent/EP4234828A3/fr
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B1/78—Heat insulating elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
    • E04B2001/7679—Means preventing cold bridging at the junction of an exterior wall with an interior wall or a floor

Definitions

  • the present invention relates to a thermal insulation element for thermal decoupling between load-bearing building parts to be made of concrete, namely a vertical building wall and a floor above or below, the thermal insulation element having a linear base body to be laid between the building parts, which at least partially consists of a compressive force-transmitting and thermally insulating Material, namely lightweight concrete, and has an upper and a lower contact surface for vertical connection to the building parts.
  • load-bearing building parts are often made of concrete structures provided with reinforcement.
  • such parts of the building are usually provided with thermal insulation applied from the outside.
  • the ceiling between the basement, such as the basement or underground car park, and the ground floor is often equipped with thermal insulation on the basement side.
  • the difficulty here is that the load-bearing parts of the building on which the building rests, such as columns and outer walls, must be connected in a load-bearing manner to the parts of the building above them, in particular the ceiling.
  • This is usually achieved by monolithically connecting the floor slab to the load-bearing columns and external walls with continuous reinforcement.
  • this creates thermal bridges that are difficult to eliminate by thermal insulation that is subsequently applied from the outside.
  • EP 3 112 542 A1 describes a thermal insulation element with a base body made of lightweight concrete and reinforcing rods made of a fiber composite material penetrating this.
  • the thermal insulation element shown there is used for thermal decoupling between a column and a floor, but is less suitable for load-bearing building walls.
  • the thermal insulation element has a pressure-resistant supporting structure with insulating elements arranged in the intermediate spaces.
  • the support structure can consist of lightweight concrete, for example.
  • Such a thermal insulation element is used for thermal insulation of brick exterior walls, for example by being used like a conventional brick as the first stone layer of the load-bearing exterior wall above the basement ceiling.
  • a compression force-transmitting and isolating connection element which is used for the vertical, load-bearing connection of building parts to be made of concrete. It consists of an insulating body with one or more pressure elements embedded in it. Shear force reinforcement elements run through the pressure elements and extend essentially vertically over the top and bottom of the insulating body for connection to the building parts to be made of concrete.
  • the insulation body can be made, for example, from foam glass or expanded polystyrene foam and the pressure elements from concrete, fiber concrete or fiber plastic.
  • a vertical heat decoupling is achieved here by reducing the contact area between the building parts. Due to the thermal decoupling, large temperature jumps occur between the building parts. In the case of large building parts such as a building wall and a floor slab, the associated different thermal expansion can lead to stresses and relative movements between the building parts, which can lead to static problems due to the reduced support points.
  • One object of the invention is therefore to specify a thermal insulation element which is better suited for use in heat decoupling between a building wall and a ceiling above or below it.
  • the thermal insulation element on its upper and lower contact surface has a plurality of projections that run at least partially perpendicularly to the laying direction—seen in plan view of the contact surface.
  • the invention is based on the basic idea of a linear laying of the thermal insulation elements in combination, i.e. the thermal insulation elements are laid end to end with their short front side without leaving a gap between them.
  • the force transmission between the building wall and the floor slab is therefore distributed linearly over the entire length of the building wall instead of at individual support points.
  • the base body of the thermal insulation elements is preferably essentially cuboid, with its longitudinal axis defining the laying direction.
  • the thermal insulation element consists at least partially of lightweight concrete as a compressive force-transmitting and thermally insulating material.
  • lightweight concrete is concrete with a dry bulk density of a maximum of 2000 kg/m 3 - typically around 1600 kg/m 3 - is defined.
  • the low density compared to normal concrete is achieved through appropriate manufacturing processes and different lightweight concrete grain sizes, preferably grain sizes with grain porosity such as expanded clay.
  • lightweight concrete in the composition used here has a thermal conductivity of between about 0.4 and 0.6 W/(m ⁇ K).
  • the thermal conductivity ⁇ 10,tr is usually measured at a mean temperature of 10° and after drying to constant weight.
  • High-pressure-resistant molded elements with low specific thermal conductivity can be produced from lightweight concrete.
  • a lightweight concrete part can also include hollow chambers or enclosed, non-load-bearing insulating bodies.
  • the height of the thermal insulation element preferably corresponds approximately to the thickness of a typical thermal insulation layer, ie approximately 5 to 20 cm, preferably 10 to 15 cm.
  • a solid or hollow-block thermal insulation element made of lightweight concrete means that a significantly larger contact surface is available with the same or less heat loss than would be the case with the use of high-pressure resistant pressure elements.
  • Additional compressive force-transmitting elements such as pressure bearings or pressure bodies made of high-performance concrete or the like are not required and are also not desired or provided within the scope of the invention, since the higher deformability or lower shear stiffness of lightweight concrete means that the loading forces would otherwise not be dissipated via the lightweight concrete base body could become.
  • the typical modulus of elasticity of normal concrete, as used for a building wall, is about E cm ⁇ 30,000 to 40,000 N/mm 2 .
  • the modulus of elasticity of the lightweight concrete used within the scope of the invention is between approximately 6,000 and 22,000 N/mm 2 , preferably between 8,000 and 16,000 N/mm 2 , most preferably approximately 14,000 N/mm 2 . Due to their lower shear stiffness compared to the adjacent parts of the building, the thermal insulation elements can better compensate for the larger differences in thermal expansion behavior that occur due to the abrupt jump in temperature in the thermal insulation zone.
  • the transition area formed by the thermal insulation elements between the wall of the building and the ceiling not only acts as a thermal insulation zone in terms of building physics and as a load-bearing component from a structural point of view, but also as a stress-damping element to compensate for different thermal expansion.
  • a plurality of rod-shaped reinforcement means are provided in the thermal insulation element, penetrating the base body and extending essentially vertically beyond the upper and lower contact surfaces. These enable a monolithic connection of the building parts, especially in the direction of shear forces.
  • the reinforcement is firmly anchored in the base body of the thermal insulation element.
  • the rod-shaped reinforcement means penetrate the projections. It has been found that the shear force transmission between the building parts is improved via the reinforcement means integrated in the thermal insulation element if they run through the projections instead of through the area between the projections.
  • the rod-shaped reinforcement means consist of a fiber composite material. While in conventional vertically arranged reinforced concrete components with a reinforcement content of 1-2%, the steel reinforcement contributes about half to the overall thermal conductivity of the building part, the combination of lightweight concrete with reinforcement made of a fiber composite material in the area of the thermal insulation element reduces the heat transfer by about 90%.
  • the projections are designed as transverse ribs arranged transversely to the laying direction. These enable a particularly effective interlocking with the adjacent concrete parts of the building.
  • the height of the projections or ribs is between 10 mm and 30 mm, in particular between 15 mm and 20 mm.
  • At least one longitudinal rib arranged in the laying direction can also be provided. This enables additional interlocking parallel to the wall and is therefore suitable for transferring loads acting perpendicularly on the wall, such as wind, into the building ceiling.
  • the present invention also relates to a method for creating load-bearing parts of a building, namely a vertical building wall and a floor above or below.
  • a plurality of thermal insulation elements are laid in a line between the parts of the building, each of which has a base body that consists at least partially of lightweight concrete as a compressive force-transmitting and heat-insulating material and has an upper and a lower contact surface for vertical connection to the parts of the building.
  • the thermal insulation elements On their upper and lower contact surfaces, the thermal insulation elements each have a plurality of projections that run at least partially perpendicularly to the laying direction.
  • the thermal insulation elements are laid in combination, i.e. the short front side of the thermal insulation elements is laid end to end without a gap.
  • the force transmission between the building wall and the floor slab is therefore distributed linearly over the entire length of the building wall instead of at individual support points.
  • reinforcement for the lower part of the building to be made of concrete and formwork around the reinforcement are first created.
  • the thermal insulation elements are inserted into this formwork so that they form a connection in one line for the part of the building to be constructed above.
  • Fresh concrete is then poured into the formwork up to the height of the lower contact surface of the thermal insulation elements used in the formwork and, if necessary, the fresh concrete is compacted using a vibrating tool.
  • thermal insulation element 10 with a base body 11 designed as a lightweight concrete molded part is shown. It is used for the monolithic connection and load-bearing connection of a building wall 21, for example in the basement of a building, to the basement ceiling 22 above it. It is also possible to use the thermal insulation element 10 for thermal insulation between a "cold" floor ceiling and a building wall located above it.
  • the thermal insulation element 10 comprises an essentially cuboid base body 11 with an upper side 12 and an underside 13, which each serve as contact surfaces for the basement ceiling or the end of the building wall 21 that supports it.
  • a total of six reinforcing rods 15 arranged in two rows protrude through the base body 11 - without the invention being restricted thereto.
  • the base body 11 of the thermal insulation element 10 consists of a lightweight concrete, which on the one hand has high pressure stability and on the other hand has good thermal insulation properties. Compared to concrete with a thermal conductivity of around 1.6 W/(m ⁇ K), the thermal conductivity when using a suitable lightweight concrete material is in the range of around 0.5 W/(m ⁇ K), which corresponds to an improvement of around 70%.
  • the lightweight concrete used essentially consists of expanded clay, fine sand, preferably light sand, superplasticizers and stabilizers, which prevent the grain from separating from floating and improve workability.
  • the compressive strength of the thermal insulation element is selected to be sufficiently high to allow the structurally planned utilization of the underlying building wall 21 made of in-situ concrete, for example corresponding to compressive strength class C25/30.
  • the reinforcing rods 15 are concreted into the lightweight concrete material of the base body 11 during the manufacture of the thermal insulation element 10 .
  • the reinforcing rods 15 themselves are made of a fiber composite material, which consists of glass fibers aligned in the direction of the force and a synthetic resin matrix.
  • a fiber composite material which consists of glass fibers aligned in the direction of the force and a synthetic resin matrix.
  • Such fiberglass rebar has an extremely low thermal conductivity, up to 70 times lower than rebar, and is thus ideally suited for use in the thermal insulation element 10.
  • the use of reinforcing bars made of stainless steel is also possible and included within the scope of the present invention.
  • the thermal insulation element 10 has three transverse ribs 12a, 13a, which run in the direction perpendicular to its longitudinal extension.
  • the transverse ribs 12a, 13a ensure interlocking with the adjoining parts of the building, ie the building wall 21 and the floor slab 22, and carry transverse forces due to different thermal expansions to the adjoining part of the building.
  • the arrangement of the reinforcing bars 15 based on the base of the base body 11 is in two parallel rows of three bars. It has proven particularly advantageous here if the reinforcing rods 15, as shown in the exemplary embodiment, are arranged in such a way that they run through the ribs 12a, 13a instead of through the incisions between the ribs 12a, 13a. For this reason, it is also advantageous that the ribs 12a, 13a on the top 12 and bottom 13, or in general arbitrarily shaped projections with areas running transversely to the longitudinal direction, correspond to one another and are arranged as mirror images or in vertical alignment with one another. Of course, base bodies with four or more ribs and a correspondingly larger number of reinforcement bars can also be used.
  • the base body 11 of the thermal insulation element 10 has a length of approximately 300 mm, without the invention being restricted thereto.
  • the height without ribs is 100 mm and thus corresponds to the usual thickness of a subsequently applied thermal insulation layer.
  • the height of the individual ribs 12a, 13a is 15 mm in each case.
  • the width of the base body corresponds to the planned wall thickness of the building wall, e.g. 180 mm.
  • FIG 4 a connection situation between a building wall 21, for example in the basement of a building, and the upper floor 22, for example the basement ceiling, is shown.
  • the uppermost end of the building wall 21 is formed by a layer of thermal insulation elements 10 placed linearly in combination, ie without a gap.
  • Their reinforcing rods 15 are concreted into the building wall 21 made of in-situ concrete.
  • the building wall 21 was concreted from below up to the thermal insulation elements 10 here.
  • the floor slab 22 also made of in-situ concrete, is located above the layer of thermal insulation elements 15 .
  • the ribs 12a, 13a create a toothing between the building wall 21, the layer of thermal insulation elements 10 and the ceiling 22 in the manner of a toothed joint, which is effective in the direction of the course of the wall.
  • a reinforcement for the building wall 21 is first created in a conventional manner and provided with formwork.
  • the thermal insulation elements are inserted into the formwork as the topmost finish and attached to the formwork with tools.
  • the formwork is then filled with fresh concrete up to the lower edge of the thermal insulation elements and this is then compacted.
  • individual thermal insulation elements 15 can be removed and reinserted after compacting. It would also be possible to provide filling openings in the thermal insulation elements, which can be closed after filling. Another possibility would be to first fill the formwork with fresh concrete and to compact it and then to use the layer of thermal insulation elements on top of the still liquid in-situ concrete.
  • the floor slab 22 can be created in a manner that is also known per se, with its reinforcement is cast with the over the upper contact surface 13 of the thermal insulation elements 10 protruding reinforcement rods 15 made of fiber composite material in the in-situ concrete of the floor slab.
  • formwork is installed above or adjacent to the thermal insulation elements 10 and reinforcement is laid for the floor slab.
  • the ceiling is then concreted in a conventional manner.
  • a thermal insulation layer made of a highly insulating material can be applied below the floor slab 22 , the thickness of which essentially corresponds at least to the height of the thermal insulation elements 10 .
  • mineral insulation panels or wood wool multi-layer panels can be installed as a thermal insulation layer.
  • the thermal insulation elements are arranged as the lowest layer between a building wall and an underlying floor or floor slab - which is also referred to as floor in the generalized sense within the scope of the present invention.
  • This embodiment is used with a "cold" ceiling, in which a thermal insulation layer is installed above the ceiling.
  • a formwork together with reinforcement for the lower floor slab 22 is first created.
  • the thermal insulation elements 10 are fastened to the upper edge of the formwork or to the reinforcement at a corresponding height.
  • the floor slab 22 is then poured from fresh concrete and compacted in a conventional manner.
  • the downward-pointing reinforcing rods 15 of the thermal insulation elements 10 are concreted in as well.
  • a reinforcement for the building wall 21 is created above the thermal insulation elements 10 and a formwork for the building wall is erected around this and including the thermal insulation elements 10 protruding from the concrete floor slab 22 . This is then concreted in the conventional manner.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
EP23177243.5A 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication Pending EP4234828A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018130843.4A DE102018130843A1 (de) 2018-12-04 2018-12-04 Vorrichtung zur Wärmeentkopplung zwischen einer betonierten Gebäudewand und einer Geschossdecke sowie Herstellverfahren
EP19210081.6A EP3663474B1 (fr) 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP19210081.6A Division EP3663474B1 (fr) 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication

Publications (2)

Publication Number Publication Date
EP4234828A2 true EP4234828A2 (fr) 2023-08-30
EP4234828A3 EP4234828A3 (fr) 2023-09-27

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Application Number Title Priority Date Filing Date
EP19210081.6A Active EP3663474B1 (fr) 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication
EP23177243.5A Pending EP4234828A3 (fr) 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication

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EP19210081.6A Active EP3663474B1 (fr) 2018-12-04 2019-11-19 Dispositif d'isolement thermique entre un mur de bâtiment bétonné et un plancher, ainsi que procédé de fabrication

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EP (2) EP3663474B1 (fr)
DE (1) DE102018130843A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021111578A1 (de) 2021-05-05 2022-11-10 Schöck Bauteile GmbH Wärmedämmendes Verzahnungsbauteil und Verfahren zur Erstellung eines Gebäudeabschnitts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106222A1 (de) 2001-02-10 2002-08-14 Schoeck Entwicklungsgmbh Mauersteinförmiges Wärmedämmelement
EP2405065A1 (fr) 2010-11-19 2012-01-11 Georg Koch Elément isolant de connexion pour supporter des charges de compression
EP3112542A1 (fr) 2015-04-23 2017-01-04 SCHÖCK BAUTEILE GmbH Dispositif et procede de couplage thermique de parties betonnees de batiment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4040433A1 (de) * 1990-12-18 1992-06-25 Strabag Bau Ag Daemmelement
EP3296478B1 (fr) * 2016-09-16 2023-09-06 Schöck Bauteile GmbH Dispositif de liaison d'un mur de bâtiment à une dalle de sol ou de plafond et élément de moulage d'un tel système
EP3467222A1 (fr) * 2017-10-09 2019-04-10 Schöck Bauteile GmbH Élément moulé destiné à etre placé entre un mur de construction et une plaque de sol ou de plafond et section de construction pourvue d'un tel élément moulé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10106222A1 (de) 2001-02-10 2002-08-14 Schoeck Entwicklungsgmbh Mauersteinförmiges Wärmedämmelement
EP2405065A1 (fr) 2010-11-19 2012-01-11 Georg Koch Elément isolant de connexion pour supporter des charges de compression
EP3112542A1 (fr) 2015-04-23 2017-01-04 SCHÖCK BAUTEILE GmbH Dispositif et procede de couplage thermique de parties betonnees de batiment

Also Published As

Publication number Publication date
EP3663474A1 (fr) 2020-06-10
EP4234828A3 (fr) 2023-09-27
EP3663474C0 (fr) 2023-06-07
DE102018130843A1 (de) 2020-06-04
EP3663474B1 (fr) 2023-06-07

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