SE1650571A1 - Fire resistant construction panel element system - Google Patents

Fire resistant construction panel element system Download PDF

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Publication number
SE1650571A1
SE1650571A1 SE1650571A SE1650571A SE1650571A1 SE 1650571 A1 SE1650571 A1 SE 1650571A1 SE 1650571 A SE1650571 A SE 1650571A SE 1650571 A SE1650571 A SE 1650571A SE 1650571 A1 SE1650571 A1 SE 1650571A1
Authority
SE
Sweden
Prior art keywords
panel
sheet
core layer
connector element
fire resistant
Prior art date
Application number
SE1650571A
Other languages
Swedish (sv)
Inventor
Gurbin Robert
Original Assignee
Zenergy Ab
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 Zenergy Ab filed Critical Zenergy Ab
Priority to SE1650571A priority Critical patent/SE1650571A1/en
Priority to EP17168458.2A priority patent/EP3239423A1/en
Publication of SE1650571A1 publication Critical patent/SE1650571A1/en

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Classifications

    • 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
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/942—Building elements specially adapted therefor slab-shaped
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
    • E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
    • E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
    • E04B1/6145—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with recesses in both frontal surfaces co-operating with an additional connecting element
    • E04B1/6158—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with recesses in both frontal surfaces co-operating with an additional connecting element the connection made by formlocking
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/292—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and sheet metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E04C2/284—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating
    • E04C2/296—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups at least one of the materials being insulating composed of insulating material and non-metallic or unspecified sheet-material
    • 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
    • E04B1/38—Connections for building structures in general
    • E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
    • E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
    • E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
    • E04B1/6145—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with recesses in both frontal surfaces co-operating with an additional connecting element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2/7401—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails
    • E04B2/7403—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using panels without a frame or supporting posts, with or without upper or lower edge locating rails with special measures for sound or thermal insulation including fire protection
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
    • E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
    • E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
    • E04B2/7411—Details for fire protection

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)

Abstract

The present invention relates to a fire resistant construction panel system (1), comprising at least a first and a second panel element (9a, 9b). Each panel element comprises a first face sheet (10a, 10b) and a second face sheet (11a, 11 b), adapted to lend stability to the construction panel. The panel element further comprises an insulating core layer (12a, 12b) arranged between the first and the second face sheet The first face sheet, the second face sheet and the core layer together form a sandwich-type construction panel, and at least one of the first and the second face sheet consists of a fireproof material. The construction panel system further comprises a connector element (16), adapted to be received in corresponding at least one groove (24) The groove is arranged in a longitudinal direction along a rim of the respective core layers. The connector element, when provided in the groove, joins the panel elements) together. The connector element is made from a fire resistant material.The invention further relates to a method of forming a wall using the system.Figure for publication: Fig. 4

Description

FIRE RESISTANT CONSTRUCTION PANEL ELEMENT SYSTEM Technical FieldThe present disclosure relates to a construction panel for building, andespecially to a fire resistant construction panel.
Backgroundln the field of building construction, prefabricated construction panels are increasingly used in order to facilitate the building process. Theprefabricated construction panel may thus be fabricated in a controlled indoorarea without the risk of adding moisture from the outside into the panels,ensuring that the quality of the panel is stable.
So-called sandwich insulating panels (SIP) for walls, for example, havepreviously been used in the construction of buildings. A sandwich panelconsists of two face sheets and a core layer arranged between the two facesheets. The face sheets are made of a stable material in order to support theconstruction. The function of the core layer is mainly to contribute insulatingproperties and to have a load-transmitting function between the two facesheets. These sandwich panels can be prefabricated in a protectedenvironment in order to avoid the entry of damp into the panel. Sandwichpanels are often designed with wooden face sheets, which may challenge thefire safety in the wall construction. Furthermore, wooden face sheets can giverise, for example, to mould and fungus damages etc. in the panel.
A way to solve this is by using a construction panel having face sheetsand core layers resistive to mould, and containing a fire resistant material.This type of panel may also be suitable in the construction of so calledpassive houses, which require an effective climate shield and moisturebarrier. However, prefabricated construction panels cannot be made incontinuous sizes without having to join two or more panels in order to achievelarge walls. These joints may weaken the construction as well as decreasethe ability of the panel element of resisting fire due to gaps. Also, in order to maintain an effective climate shield and moisture barrier it is necessary to 2 avoid carriers of cold and moisture into the panel, such as nails, screws, andrivets.
A way to solve this is to provide the fire resistant panel with amale/female tongue and groove arrangement in order to join two panels together. However, this type of construction may not fulfill the high standard fire resistant classification to El60, which is required for certain building types. lt is also a complicated and time consuming procedure in the prefabricationstages since it is not possible to easily adapt to the size of the building onsite. lt is therefore a need for a solution for a fire resistant constructionpanel which solves the abovementioned problems in the construction ofbuildings.
Summarylt is an object of the present invention to provide an improved solution that alleviates the mentioned drawbacks with present devices.
According to a first aspect of the invention, a fire resistant constructionpanel system is provided, comprising at least a first and a second panelelement, each panel element comprising a first face sheet and a second facesheet, adapted to lend stability to the construction panel, an insulating corelayer arranged between the first and the second face sheet, wherein the firstface sheet, the second face sheet, and the core layer together form asandwich-type construction panel, and wherein at least one of the first andthe second face sheet consists of a fireproof material. The construction panelsystem further comprises at least one longitudinally extending connectorelement, adapted to fit into a groove in each panel element. The groove ineach panel element extends along a longitudinal direction and is formed byeach first and second panel element comprising a recess, wherein the recessextends between the first and second face sheets along a rim of the corelayer. The connector element comprises a first panel sheet, a second panelsheet, and an insulating core layer arranged between the first and secondpanel sheet, wherein the first panel sheet, the second panel sheet, and the 3 core layer together form a sandwich-type connector element, and the outerdimension of the connector element corresponds to the width of the groovebetween the face sheets of the panel elements.
Since the first face sheet, the second face sheet, and the core layermay together form a sandwich-type construction panel, a construction panelwhich is stable yet relatively thin and has very good insulating capacity maythus be achieved. The same insulating capacity with a wall made fromtraditional building methods may require a much thicker wall. By providing thesurface elements of a construction panel, that is the face sheets, with fireresistant material, the overall fire resistance of a wall may be improved. When joining two (or more) panel elements in order to form large walls or systems, a gap in the panel joint occur. This gap may give rise to a number of weaknesses in the structure, for instance strength, but also the gap may allow air, oxygen, moisture or other unwanted material to enter the structure andthe building.
By joining two construction panels with an overlapping connectorelement, that has fire resistant characteristics, the negative effects of that gapcan be reduced or prevented. Further to this the, progression of fire can begreatly reduced.
By overlapping it is meant that between the edges of a first and asecond panel element to be joined, a groove may be formed by removal ofcore material along the rim of the panel element. The groove in between thepanel elements houses the connector element which bridges the gapbetween the two panel elements. The term ”connector element” or”connector” is to be interpreted as means forjoining (i.e. a joining means) atleast two panel elements together. The overlapping connector element maythus be arranged in the groove between each pair of the core layers to bejoined. By providing a connection between the panel elements according tothe invention fire resistance classification El60 may be achieved.
According to an embodiment of the invention, the width of the panelsheet of the connector element equals the width of the connector elementcore layer and the longitudinal extension of the panel sheet of the connector 4 element equals the Iongitudinal extension of the connector element corelayen As the width and Iongitudinal extension of the panel sheet of theconnector element corresponds to the width and Iongitudinal extension of thecore layer of the connector element, a planar surface around thecircumference of the connector element is formed which may allow for a tightfitting towards the surfaces of the groove and thereby improve the fireresistance.
According to another embodiment of the invention, at least one of thefirst and the second face sheet may consist of magnesium oxide.
Magnesium oxide has fire resistant capabilities, which means that aface sheet that contains magnesium oxide may provide a fire resistant panelelement. Since the face sheet may be the part of the element that is arrangedtowards the environment in a room or towards the outside, a fire resistantshield may be advantageous. lt is possible that the face sheets may containother fire resistant components or a mixture of several fire resistantcomponents. Furthermore, a highly alkaline, yet inorganic material, such asmagnesium oxide, can thus prevent the possible incipient growth of mould, forexample, in the construction in the event of damp formation. This may be incontrast to a situation in which, for example, wood is used in the face sheets.
According to another aspect of the invention the panel sheet of theconnector element may be made from magnesium oxide.
By making the panel sheet of the connector element from magnesiumoxide, the connector element may be provided with fire resistant capabilities.The fire resistant characteristics may be similar to that of the face sheet. lt may be possible that the panel sheet may be made from the samematerial as the face sheet. The thickness of the panel sheet may be the sameas the thickness of the face sheet. However, if required due to safety and/orstability or any other reason, the thickness may be different.
According to another embodiment of the invention, the connectorelement may be fixated in the groove by a fixating means. 5 The connector element may require fixating in the groove. Fixating theconnector element may be required in order to provide a stable joint, but alsoin order to seal any gaps that may carry oxygen from outside of the buildingwhich may serve as fuel to a fire. The fixating means may be for instance aglue, foam, self adhesive tape or a paste or the like. The fixating may also beachieved by a mechanical fit.
According to another embodiment of the invention, the fixating meansmay be fire resistant adhesive glue. lt is an advantage fixating the connector element by using fire resistantadhesive glue. By doing this, a safe construction may be provided, minimizingany possible fire hazards. Further, by using adhesive glue, any use offastening elements, such as nails and screws may be avoided. Nails andscrews serve as cold bridges and may affect the indoor climate of thebuilding. Since cold bridges out towards the outer side of the wall may beavoided, it may make the wall construction more energy-efficient.
According to another embodiment of the invention, the core layer mayconsist of a plastics material, preferably a foamed plastics material.
The principal object of the core layer to have an insulating functionmay thus be met. Furthermore, a plastics material of this kind may have theadvantage that it is not organic, and thus further prevents mould growth, forexample, in the panel. Moreover, such a material may not be water-permeable, which may give less risk of damp damage and greater insulatingcapacity.
According to another embodiment of the invention, the core layer of theconnector element may consist of a plastics material, preferably a foamedplastics material.
According to another embodiment of the invention, the panel elementsmay be prefabricated in a plant, prior to use of the panel element in theconstruction of a building.
By using prefabricated panel elements, it may provide flexibility to thebuilding procedure on site as well as the prefabrication process is done in a controlled process in a plant where moisture levels may be low. 6 According to a second aspect of the invention, it is provided a methodfor forming a wall using a fire resistant construction panel system comprisingthe steps of: providing a first and second panel element, each panel elementcomprising a first face sheet and a second face sheet, adapted to lendstability to the construction panel, an insulating core layer arranged betweenthe first and the second face sheet, wherein the first face sheet, the secondface sheet, and the core layer together form a sandwich-type constructionpanel, and wherein at least one of the first and the second face sheet consistsof a fireproof material; providing a first longitudinal recess between the firstand second face sheet of the first panel element along a rim of the core layer;providing a second longitudinal recess between the first and second facesheet of the second panel element along a rim of the core layer; arranging afirst and second panel element such that a longitudinal groove is formed fromthe first and second recesses; providing a connector element of a fireresistant material in the groove, the connector element joining the first andsecond panel element together, the connector element comprising a firstpanel sheet, a second panel sheet, and an insulating core layer arrangedbetween the first and second panel sheet, wherein the first panel sheet, thesecond panel sheet, and the core layer together form a sandwich-typeconnector element, wherein at least one of the first panel sheet and thesecond panel sheet consists of a fireproof material, and wherein an outerdimension of the connector element corresponds to the width of the groovebetween the face sheets of the panel elements. Any steps may be repeatedas required.
By using a method according to this, it is possible to directly andinstantly connect two or more panel elements together easily on the buildingsite. This may be an advantage, since it may occur that the panel sizes areerroneously calculated, and the method may thus allow an existing panelelement to be joined with another without the need of fastening elementssuch as nails or screws. The steps may be done in any suitable order,depending on the type of manufacture. The core layer and the face sheet maybe joined, and that the recess is cut or milled out subsequently. Alternatively, 7 the recess may be cut out or milled before the face sheet is applied.Alternatively, the core layer may be manufactured having dimensions smallerthan the face sheet, thereby forming the recess when they are joined.
Further, the step of arranging the connector element may be altered tosuit the type of manufacture and may thus be performed in a number of ways.The panel elements may be arranged next to each other, and subsequentlythe connector element is arranged in the groove simultaneously. Alternatively,the connector element is arranged in one recess of a first panel element, andsubsequently the second panel element is arranged next to the first panelelement such that the connector element connects the first and second panelelements. The method allows to repeat any steps as required, and to performthe steps in any necessary order.
The method may further comprise the step of applying fixating meansin the longitudinal groove on a first and a second core layer.
This step allows a fixating means to be applied in the groove prior toarranging a connector element. The fixating means may be an adhesive, aself adhesive tape or glue which may be fire resistant. Applying fixatingmeans is the most preferred embodiment, but depending on the alternativefixating, for instance a mechanical press fit, the step of applying fixatingmeans may be optional.
Brief Description of the Drawinqs The invention will in the following be described in more detail withreference to the enclosed drawings, wherein: Fig. 1 shows a top view of a panel element.
Fig. 2 shows a top view of the groove between two panel elements.
Fig. 3 shows an exploded perspective view of a joint between twopanel elements.
Fig. 4 shows a top view of two panel elements joined by a connectorelement.
Fig. 5 shows a top view of a joint between two panel elements according to an embodiment of the invention, 8 Fig. 6 shows an exploded perspective view of a joint between twopanel elements according to an embodiment of the invention, Fig. 7 shows a perspective view of a joint between two panel elementsaccording to an embodiment of the invention, Fig. 8 shows a top view of a joint between two panel elementsaccording to an embodiment of the invention, Fig. 9 shows a front view of a wall built from a plurality of panel elements according to an embodiment of the invention.
Description of Embodiments The present invention will be described more fully hereinafter withreference to the accompanying drawings, in which preferred embodiments ofthe invention are shown. This invention may, however, be embodied in manydifferent forms and should not be construed as limited to the embodiments setforth herein; rather, these embodiments are provided so that this disclosurewill be thorough and complete, and will fully convey the scope of the inventionto those skilled in the art. ln the drawings, like numbers refer to like elements. ln fig. 1 a top view of a fire resistant construction panel element isillustrated. The panel element comprises a first face sheet 10a and a secondface sheet 11a, arranged on one side each of a core layer 12a. These threeparts, the first and second face sheet and the core layer, together form a so-called sandwich panel or element. The face sheets 10, 11 can be made ofmagnesium oxide. This gives the face sheets stability and fireproofingproperties. The face sheets can also be made of other materials, such aspolymer concrete, alkaline polymer or polyester mixed with a filler materialsuch as sand, lime, potash or some ceramic material. The core layer 12 maybe made of a foamed plastics material, for example polyurethane foam or anEPS plastic (Expanded Polystyrene). The function of the core layer 12 is tocontribute to the strength and insulating capacity of the construction panel 1.The core layer 12 has a function of transmitting load to the face sheets 10,11.ln fig. 2 a top view of two joined panel elements 9a, 9b is illustrated. Thepanel elements may be joined to create a bigger wall or panel system. A 9 groove 24 is formed in-between the two panel elements 9a, 9b by therecesses 23a, 23b in the respective panel element 9a, 9b. The groove 24may run along the entire longitudinal extension of the panel element. Thegroove 24 may be provided by cutting, countersinking or milling the corelayer, or by forming the panel element using a core layer of smaller dimensionthan the face sheets. The dimensions of the groove 24 correspond to theouter dimensions of the connector element 16 (see fig 5).
Fig. 3 illustrates an exploded view of two panel elements 9a, 9b with ajoining connector element 16. The connector element 16 joins the panelelements 9a, 9b by being placed in the groove 24 between them. The panelsheets 25, 26 of the connector element 16 are in contact with the face sheets10, 11 of the panel elements 9a, 9b and the core layer 27 of the connectorelement 16 are in contact with the core layer 12 of the panel elements 9a, 9b. ln fig. 4 the construction panel system 1 with two panel elements 9a,9b joined by a connector element 16 is illustrated. The connector element 16may be fixated in the groove 24 by using a fire resistant fixating means 17,such as glue, tape, paste or foam. The fixating means 17 provides additionalstrength to the structure and seal to the joint in order to reduce the risk of airpockets. ln fig. 4 is further the width W of the groove 24 indicated,corresponding to the distance between the face sheets 10, 11 of the panelelements 9. The connector element 16 has the overall corresponding width Win order to fit in the groove 24. ln fig. 5 a top view of a fire resistant construction panel system isillustrated with joined panel elements 9a, 9b. A first panel element 9a and asecond panel element 9b are arranged side by side, with one edge arrangedagainst the other in order to create a bigger wall or system. Each panelelement 9, 9a, 9b comprises a first face sheet 10, 10a, 10b and a second facesheet 11, 11a, 11b, which are arranged on one side each of a core layer 12,12a, 12b. These three parts the face sheets and the core layer 10, 11, 12together forms a so-called sandwich panel or element. The face sheets 10, 11can be made of magnesium oxide. This gives the face sheets stability and fireproofing properties. The face sheets can also be made of other materials,such as polymer concrete, alkaline polymer or polyester mixed with a fillermaterial such as sand, lime, potash or some ceramic material. The core layer12 may be made of a foamed plastics material, for example polyurethanefoam or an EPS plastic (Expanded Polystyrene). The function of the corelayer 12 is to contribute to the strength and insulating capacity of theconstruction panel 1. The core layer 12 has a function of transmitting load tothe face sheets 10, 11.
According to one embodiment each of the panel elements comprises agroove 15. As can be seen in Figs 5 and 6, the groove 15 may be provided, inthe core layer 12 adjacent to face surfaces 13, 14, or even directly in the facesurfaces, of the core layer and running along a rim 21a, 21 b of the core layer12. According to one embodiment the groove 15 runs along the entire lengthof the panel element 9 (as seen in Fig. 9). According to another embodiment(not shown) the groove runs partially or alternatively intermittently slottedalong the length of the panel element.
The groove 15 may be provided by cutting, countersinking or millingthe core layer.
The face surface 13, 14 is the surface onto which the face sheet 10, 11is arranged. Each panel element 9 to be joined comprises at least one groove15, and the grooves 15 of two panel elements 9 are arranged next to eachother, forming a larger indentation the panel elements 9. Further, in Fig. 5 aconnector element 16 is illustrated. The connector element 16 is adapted tobe arranged inside, inserted, received or provided in the groove 15, andadapted such that when it is inserted in the respective grooves 15 of the corelayers, it extends between and overlaps a gap 19 between the panelelements 9a, 9b, such that the gap orjoint 19 between the panel elements 9a,9b is covered. Through this connector element 16 a strong joint, which isresistive to the outside environment may be achieved.
According to one embodiment the connector element 16 may befixated in the groove 15 by using a fire resistant fixating means 17, such asglue, tape, paste or foam. The fixating means 17 provides additional strength 11 to the structure and seal to the joint in order to reduce the risk of air pockets.Further, in Fig. 9 the seam 18 of the face sheets 10a, 10b, 11a, 11b is shown.The face sheets 10, 11 of the panel elements 9 are arranged such that theseam 18 between two first face sheets 10a, 10b are located at a distancefrom, or non-linear with, the joint or gap 19 of the panel elements 9a, 9b. Thisconstruction may reduce the number of weak spots in the construction paneland load may be absorbed throughout the entire construction panel.
Fig. 6 illustrates an exploded view of the two joint panel elements 9a, 9b,forming the system according to an embodiment of the invention.
As illustrated in fig. 7 the groove 15, and connector element 16, extendalong the entire length of the side of the panel element 9 to be connected orjoined with another panel element 9.
Fig. 7 shows the core layer 12 of two panel elements 9a, 9b and theconnector element 16 when joined together. From fig. 7 it is clear that thegroove 15 in one embodiment is arranged substantially in, or as a depressionin, the face surface 13, 14 of the core layer 12. ln fig. 7, it is also shown thatthe groove 15 and thereby the connector element 16 is provided along alength of the edge of the panel element 9a, 9b in a direction Y. ln fig. 8 another embodiment of the invention is illustrated, where the atleast one groove 15 have been provided in the core layer, at a distance fromthe respective face sheet surfaces, i.e. the connector elements 16 are locatedinside the core layer 12 when the two panel elements 9a, 9b have beenjoined together. As in other embodiments, this groove 15 may also be cutalong the entire length of the edge, or rim 21a, 21 b of the panel element 9a,9b. The groove 15 can be cut anywhere between the face surfaces 13, 14, aslong as required strength is obtained to the structure. According to anotherembodiment several parallel grooves may be cut out in the core layer andprovided with connector element 16.
Fig. 9 shows a wall constructed using the fire resistant constructionpanel system 1 according to an embodiment. A plurality of panel elements 9joined both vertically and horizontally against each other. Each panel has a groove cut out where each connector element is provided in order to achieve 12 a wall, i.e. a system of panel elements, of any size. Connector elements arearranged to connect the panel elements in the wall, both horizontally andvertically, thereby providing a complete wall with high strength and fire resitance.
Possible dimensions for one embodiment of the invention aredescribed below. The sandwich part 10, 11, 12 of the construction panel 1 isaround 140 mm thick, or more specifically 136 mm thick. With a fire resistantconstruction panel 1 according to the invention, a U-value of 0.1 can beattained with a sandwich part thickness of around 140 mm. A U-valueindicates the thermal conductivity of a material layer. The value is quoted inWatts per square meter and Kelvin. The better the insulating capacity, thelower the U-value. The cut out groove 15 may be any width w as required.According to one embodiment the dimension is around 25-100 mm wide and5-15 mm deep for each groove 15 of each panel element 9. According toanother embodiment a dimension width w is 50 mm and a depth d is 8 mm.The connector element 16 may thus be provided with any suitable dimensioncorresponding to the groove 15. The connector element 16 may, according toone embodiment be arranged to fill the entire length of the groove 15. ln the figures 1-9, it may be determined how to achieve a wall 20 usingthe system 1. The method of forming a wall 20 using the system 1 may bedone in several ways and the steps to be carried out may be done in manyalternative sequences.
A first and second panel element of a fireproof material and aninsulating core layer arranged between the first and the second face sheet, forming a sandwich-type construction panel is provided.
E A panel system or wall was constructed, i.e. two panel elements werejoined using the connector element as described above. The system or wallmeasured 3 X 3 m. ln the trial, following the measuring protocol for the fireresistance class El60, the system was able to withstand fire for more than 60 13 minutes (63 minutes and 41 seconds). This means that a system, asdescribed above provides the desired fire resistance, while being able to be constructed as a larger wall. ln the drawings and specification, there have been disclosed preferredembodiments and examples of the invention and, although specific terms areemployed, they are used in a generic and descriptive sense only and not forthe purpose of limitation, the scope of the invention being set forth in the following claims.

Claims (10)

1. A fire resistant construction panel system (1), comprising at least afirst and a second panel element (9a, 9b), each panel element comprising a first face sheet (10a, 10b) and a second face sheet (11a, 11b), an insulating core layer (12a, 12b) arranged between the first and thesecond face sheet, wherein the first face sheet, the second face sheet, and the core layer togetherform a sandwich-type construction panel, and wherein at least one of the first and the second face sheet consists of afireproof material,characterized in that said construction panel system further comprises at least onelongitudinally extending connector element (16), adapted to fit into a groove(24) in each panel element, wherein said groove in each panel elementextends along a longitudinal direction and is formed by each first and secondpanel element comprising a recess (23a, 23b), wherein the recess extendsbetween the first and second face sheets along a rim of the core layer, and the connector element comprises a first panel sheet (25), a secondpanel sheet (26), and an insulating core layer (27) arranged between the firstand second panel sheet, where in the first panel sheet, the second panelsheet, and the core layer together form a sandwich-type connector element, wherein at least one of the first panel sheet (25) and the second panelsheet (26) consists of a fireproof material, and wherein the outer dimension of the connector element corresponds to the width of the groove between the face sheets of the panel elements.
2. Fire resistant construction panel system (1) according to claim 1,wherein the width of the panel sheet (25, 26) of the connector element (16)equals the width of the connector element core layer (27) and wherein thelongitudinal extension of the panel sheet of the connector element equals the longitudinal extension of the connector element core layer.
3. Fire resistant construction panel system (1) according to any one ofthe above claims, wherein at least one of the first (10) and the second (11)face sheet consists of magnesium oxide.
4. Fire resistant construction panel system (1) according to any of thepreceding claims, wherein the panel sheet (25, 26) of the connector element (16) is made from magnesium oxide.
5. Fire resistant construction panel system (1) according to any of theclaims 1-4, wherein the panel sheet (25, 26) of the connector element (16)and the face sheet is made from the same material.
6. Fire resistant construction panel system (1) according to any of thepreceding claims, wherein the connector element (16) is fixated in the groove(24) by a fixating means (17).
7. Fire resistant construction panel system (1) according to claim 6,wherein the fixating means (17) is a fire resistant adhesive glue.
8. Fire resistant construction panel system (1) according to any one ofthe above claims, wherein the core layer (12) consists of a plastics material,preferably a foamed plastics material.
9. Fire resistant construction panel system (1) according to any one ofthe above claims, wherein the core layer (27) of the connector element (16)consists of a plastics material, preferably a foamed plastics material.
10. Method for forming a wall (20) using a fire resistant constructionpanel system (1) according to any of the claims 1-9, comprising the steps of:providing a first and second panel element, each panel elementcomprising a first face sheet (10a, 10b) and a second face sheet (11a, 11b), 16 an insulating core layer (12a, 12b) arranged between the first and the secondface sheet, wherein the first face sheet, the second face sheet, and the corelayer together form a sandwich-type construction panel, and wherein at leastone of the first and the second face sheet consists of a fireproof material, providing a first longitudinal recess (23a) between the first (10a) andsecond (11a) face sheet of the first panel element (9a) along a rim of the corelayer (12a), providing a second longitudinal recess (23b) between the first (10b)and second (1 1 b) face sheet of the second panel element (9b) along a rim ofthe core layer (12b), arranging a first and second panel element (9) such that a longitudinalgroove (24) is formed from the first and second recesses, providing a connector element (16) of a fire resistant material in thegroove, the connector element joining the first and second panel elementtogether, the connector element comprising a first panel sheet (25), a secondpanel sheet (26), and an insulating core layer (27) arranged between the firstand second panel sheet, where in the first panel sheet, the second panelsheet, and the core layer together form a sandwich-type connector element,wherein at least one of the first panel sheet (25) and the second panel sheet(26) consists of a fireproof material, and wherein an outer dimension of theconnector element corresponds to the width of the groove between the facesheets of the panel elements.
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