DK152934B - Self-supporting construction element - Google Patents

Self-supporting construction element Download PDF

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Publication number
DK152934B
DK152934B DK132482A DK132482A DK152934B DK 152934 B DK152934 B DK 152934B DK 132482 A DK132482 A DK 132482A DK 132482 A DK132482 A DK 132482A DK 152934 B DK152934 B DK 152934B
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DK
Denmark
Prior art keywords
foam concrete
foam
mpa
self
supporting construction
Prior art date
Application number
DK132482A
Other languages
Danish (da)
Other versions
DK132482A (en
DK152934C (en
Inventor
Lars Ingvar Ingvarsson
Original Assignee
Dobel Ab
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Filing date
Publication date
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Publication of DK132482A publication Critical patent/DK132482A/en
Publication of DK152934B publication Critical patent/DK152934B/en
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Publication of DK152934C publication Critical patent/DK152934C/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26Building 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Laminated Bodies (AREA)
  • Glass Compositions (AREA)

Description

iin

DK 152934BDK 152934B

Den foreliggende opfindelse angår et labrændbart, damp- og vandtæt, varmeisolerende, selvbærende byggeelement bestående af to parallelle daskplader af metal og en kerne af skumbeton fremstillet på basis af cement, vand og skum-5 danner.The present invention relates to a flammable, vapor and waterproof, heat insulating, self-supporting building element consisting of two parallel metal sheet metal sheets and a foam concrete core made from cement, water and foam forming.

Et element af denne art er kendt fra DE-PS 875.403. Selvom dette skrift ikke primært omhandler sandwich-elementer med daskplader af metal, viser skriftet, at såfremt man fremstiller sandwichelementer som angivet i indledningen, 10 må man samtidig løse forskellige problemer med hensyn til sammenbindingen mellem dækpladerne og kernematerialet. Løsningerne ifølge patentskriftet er ikke heldige med hensyn til elementets varmeisolerende egenskaber, idet de indstøbte bøjler danner kuldebroer, som går gennem hovedparten af 15 elementets tykkelse.An element of this kind is known from DE-PS 875,403. Although this specification does not primarily deal with sandwich elements with sheet metal sheets, the document shows that if you make sandwich elements as stated in the introduction, at the same time various problems regarding the connection between the cover plates and the core material must be solved. The solutions according to the patent are not fortunate in terms of the heat insulating properties of the element, since the embedded shackles form cold bridges which pass through most of the thickness of the element.

Formålet med opfindelsen er at tilvejebringe et selvbærende byggeelement af den indledningsvis nævnte art, men hvor de nævnte problemer med sammenbinding er løst, og hvor man samtidig kan opnå så lave varmeledningsværdier, som er 20 nødvendige ved nutidens byggeelementer.The object of the invention is to provide a self-supporting building element of the kind mentioned initially, but where the said problems of bonding are solved and where at the same time as low heat conductivity values as are necessary for today's building elements can be obtained.

Dette formål kan opnås ved, at byggeelementet ifølge opfindelsen er ejendommeligt ved det i kravets kendetegnende del angivne.This object can be achieved in that the building element according to the invention is peculiar to the characterizing part of the claim.

Opfindelsen belyses nærmere i det følgende.The invention will be further elucidated in the following.

25 Varmetransmissionskoefficienten i et moderne byggeele ment bør ikke overstige 0,10 W/(m3 · K), da elementet ellers må gøres overdrevent tykt eller man bliver nødsaget til at benytte supplerende isolering. Ved at anvende et tokomponent-skummiddel ved fremstillingen af skumbeton kan man uden vanske-30 lighed komme ned på en varmetransmissionskoefficient på 3 0,06 W/(m · K) ved en rumvægt af det færdighærdede skumbeton 3 på 200 kg/m . Dette er blandt andet blevet afprøvet i praksis med et funktionsdygtigt skumbetonanlæg under anvendelse af det i handelen forekommende tokomponent-skummiddel Cellex. Frem-35 stillingen af skumbetonen blev foretaget i en speciel maskine, hvor der først tilsattes vand, cement og den ene af skummiddel-komponenterne, hvorefter der udførtes blanding under kraftig 225 The coefficient of heat transfer in a modern building element should not exceed 0.10 W / (m3 · K), otherwise the element must be made excessively thick or forced to use additional insulation. By using a two-component foaming agent in the production of foam concrete, a heat transfer coefficient of 3 0.06 W / (m · K) can be reached without difficulty at a room weight of the ready-made foam concrete 3 of 200 kg / m. Among other things, this has been tested in practice with a functional foam concrete plant using the commercially available two-component foam agent Cellex. The preparation of the foam concrete was carried out in a special machine, where water, cement and one of the foaming components were first added, after which mixing was carried out under vigorous 2

DK 152934BDK 152934B

omrøring. Derefter tilsattes under omrøring og lufttilførsel også den anden komponent. Derefter pumpedes skummassen gennem slanger frem og ind mellem stålpaneleme. Der tilsattes ingen ballasti 5 Ved at ændre på fremstillingsparametrene kan skumbetonens rumvægt varieres fra 200 kg/m og opad. Ved fremstilling af et element ifølge opfindelsen er den øvre grænse for rumvæg- 3 ten sat til 600 kg/m . Ganske vist stiger skumbetonens styrkeegenskaber med øget rumvægt, men på den anden side stiger 10 varmetransmissionskoefficienten også med den øgede rumvægt og ved 600 kg/m kan man risikere at man er kommet op på den 3 ønskede maksimalværdi på 0,10 W/(m · K). Indenfor rumvægt- 3 området fra 200 til 600 kg/m er det på undersøgte prøver vist at man ikke kommer ned under følgende styrkeegenskaber hos skum-1 5 betonen:stirring. Then, with stirring and air supply, the second component was also added. Then the foam mass was pumped through hoses back and forth between the steel panels. No ballast was added 5 By changing the manufacturing parameters, the weight of the foam concrete can be varied from 200 kg / m upwards. In preparing an element according to the invention, the upper limit of the room weight 3 is set at 600 kg / m. Admittedly, the strength properties of foam concrete increase with increased room weight, but on the other hand, the 10 coefficient of heat transfer also increases with the increased room weight and at 600 kg / m you may have reached the 3 desired maximum value of 0.10 W / (m · K). Within the space-weight range of 200 to 600 kg / m, the tests examined show that the following strength properties of the foam-concrete are not reduced:

Trykstyrke 0,3 MPaCompressive strength 0.3 MPa

Elasticitetsmodul 500 MPaElastic modulus 500 MPa

Forskydningsmodul 250 MPa 20Shear modulus 250 MPa 20

Vedhæftningen mellem metaloverflade og tokomponent- skumbeton viste sig at være fuldstændig. Ved forsøg viste det sig nemlig, at brud ved forskydningsbelastningen opstod i skum- betonlaget og ikke i grænseoverfladen mellem skumbeton og me-25 talplade. Af denne grund og på grund af skumbetonens gode styrkeegenskaber har det vist sig, at elementet kan optage store belastninger.The adhesion between the metal surface and two-component foam concrete proved to be complete. In the case of tests, it was found that fractures at the shear load occurred in the foam concrete layer and not in the interface between foam concrete and metal plate. For this reason and because of the good strength properties of the foam concrete, it has been found that the element can absorb large loads.

Skumbetonen forhindrer, at stålpladerne buler ud, således at deres materialestyrkeegenskaber kan udnyttes fuldt ud. Ved 30 hjælp af skumbetonens relativt høje trykstyrke danner det et godt underlag, således at høje punktbelastninger af elementet kan tillades. Da skumbetonen desuden er en porebeton med lukkede porer, kræves der heller ikke ekstra fugtspærring eller vindspærring.The foam concrete prevents the steel sheets from bulging, so that their material strength properties can be fully utilized. By means of the relatively high compressive strength of the foam concrete, it forms a good substrate, so that high point loads of the element can be allowed. Furthermore, since the foam concrete is a pore concrete with closed pores, no additional moisture barrier or wind barrier is required.

33 Ved denne kombination af metalplader og tokomponent- skumbeton er der skabt et byggeelement med uovertrufne styrke- 333 With this combination of sheet metal and two-component foam concrete, a building element with unmatched strength has been created 3

DK 152954BDK 152954B

egenskaber og bygningsfysiske egenskaber til konkurrencedygtige priser.properties and building physical properties at competitive prices.

Byggeelementets længde kan variere. Om muligt ønsker man fx at lade en elementlængde dække hele strækningen fra tagryg-5 ning til tagskæg eller hele sidevæggens højde. Ligeledes ønsker man ofte at benytte så brede elementer som muligt. Begrænsningerne afhænger naturligvis af håndteringsmulighederne ved fremstillingen og på byggepladsen samt transportmulighederne. Da byggeelementet ifølge opfindelsen kommer til at blive forholds- 10 vis lettere end 'normalt forekommende elementer, skulle størrelsen sikkert være den mest afgørende begrænsningsfaktor. Længden kommer formentlig ikke til at overstige 12 m med 4-6 meter som den normale størrelse og bredden ikke 2,4 meter med ca.The length of the building element may vary. For example, if possible, you want to allow an element length to cover the entire stretch from roof ridge to roof ridge or the entire height of the sidewall. Likewise, one often wants to use as broad elements as possible. The limitations, of course, depend on the handling possibilities at the manufacturing and at the construction site as well as the transport options. Since the building element according to the invention is going to be relatively lighter than normal elements, size should surely be the most important limiting factor. The length will probably not exceed 12 meters by 4-6 meters as the normal size and the width not 2.4 meters by approx.

1,2 meter som den normale størrelse.1.2 meters as the normal size.

1515

Den plade, som indgår i panelerne på begge sider, er i den normale udførelse helt plan, men den kan af hensyn til udseendet eller af lignende årsager profileres noget. Pladetykkelsen kan variere mellem 0,4 og 2,5 mm. Den nedre grænse er i stort omfang bestemt af fremstillingstekniske grunde. Det er fx uøkonomisk at udvalse stålplade til tyndere dimensioner. Den øvre grænse for stålplade er normalt 1,5 mm. Større tykkelser end dette behøver ud fra et styrkesynspunkt ikke at være nødvendigt og konstruktionen bliver i så fald alt for tung og dyr.The panel that is included in the panels on both sides is quite flat in the normal design, but it can be somewhat profiled for reasons of appearance or for similar reasons. The plate thickness can vary between 0.4 and 2.5 mm. The lower limit is largely determined for manufacturing reasons. For example, it is uneconomical to select steel plate for thinner dimensions. The upper limit for steel plate is usually 1.5 mm. Larger thicknesses than this need not be necessary from a strength point of view and the construction will then become too heavy and expensive.

Hvis man benytter aluminium er man derimod nødsaget til at gå 25 op til 2,5 mm, da pladen let deformeres af slag og stød ved håndtering.On the other hand, if aluminum is used, it is necessary to go 25 up to 2.5 mm, as the plate is easily deformed by impact and shock during handling.

30 3530 35

Claims (1)

DK 152934B i Ubrændbart/ damp- og vandtæt/ varmeisolerende selvbærende byggeelement bestående af to parallelle dækplader af metal og en kerne af skumbeton fremstillet på basis af 5 cement, vand og skumdanner, kendetegnet ved, at den i skumbetonen indgående skumdanner er af tokomponenttype og at den færdighærdede skumbeton har et elasticitetsmodul på mindst 500 MPa, et forskydningsmodul på mindst 250 MPa, en trykstyrke på mindst 0,3 MPa og en rumvægt på 10 200-600 kg/m3. 15 For: Dobel AB 20 Kontor for INDUSTRIEL ENERET 25 30 35DK 152934B in Non-combustible / steam and waterproof / heat insulating self-supporting building element consisting of two parallel metal sheets and a core of foam concrete made on the basis of 5 cement, water and foam forming, characterized in that the foam forming part of the foam concrete is of two-component type and that the ready-made foam concrete has a modulus of elasticity of at least 500 MPa, a shear modulus of at least 250 MPa, a compressive strength of at least 0.3 MPa and a room weight of 10 200-600 kg / m3. 15 For: Dobel AB 20 OFFICE FOR INDUSTRIALLY ENTERED 25 30 35
DK132482A 1981-03-25 1982-03-24 SUSTAINABLE BUILDING ELEMENT DK152934C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8101900A SE436506B (en) 1981-03-25 1981-03-25 Separate building element
SE8101900 1981-03-25

Publications (3)

Publication Number Publication Date
DK132482A DK132482A (en) 1982-09-26
DK152934B true DK152934B (en) 1988-05-30
DK152934C DK152934C (en) 1988-10-17

Family

ID=20343429

Family Applications (1)

Application Number Title Priority Date Filing Date
DK132482A DK152934C (en) 1981-03-25 1982-03-24 SUSTAINABLE BUILDING ELEMENT

Country Status (4)

Country Link
DK (1) DK152934C (en)
FI (1) FI70444C (en)
NO (1) NO156135C (en)
SE (1) SE436506B (en)

Also Published As

Publication number Publication date
NO156135B (en) 1987-04-21
SE436506B (en) 1984-12-17
FI820709L (en) 1982-09-26
DK132482A (en) 1982-09-26
SE8101900L (en) 1982-09-26
NO156135C (en) 1987-07-29
NO820952L (en) 1982-09-27
FI70444C (en) 1986-09-19
DK152934C (en) 1988-10-17
FI70444B (en) 1986-03-27

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