EP0135240A2 - Selbsttragende Platte für einen doppelten Fussboden - Google Patents

Selbsttragende Platte für einen doppelten Fussboden Download PDF

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Publication number
EP0135240A2
EP0135240A2 EP84201312A EP84201312A EP0135240A2 EP 0135240 A2 EP0135240 A2 EP 0135240A2 EP 84201312 A EP84201312 A EP 84201312A EP 84201312 A EP84201312 A EP 84201312A EP 0135240 A2 EP0135240 A2 EP 0135240A2
Authority
EP
European Patent Office
Prior art keywords
slab
concrete
slab according
ribs
cavities
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.)
Withdrawn
Application number
EP84201312A
Other languages
English (en)
French (fr)
Other versions
EP0135240A3 (de
Inventor
Arnold Emiel Marie Van Acker
Ghislain Gustaaf Amandus Vermeulen
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.)
"cbr Beton"
Original Assignee
"cbr Beton"
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 "cbr Beton" filed Critical "cbr Beton"
Publication of EP0135240A2 publication Critical patent/EP0135240A2/de
Publication of EP0135240A3 publication Critical patent/EP0135240A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/02—Flooring or floor layers composed of a number of similar elements
    • E04F15/024—Sectional false floors, e.g. computer floors
    • E04F15/02405—Floor panels

Definitions

  • the present invention relates to a self-supporting and removable slab, made of concrete, such as cement concrete, resin concrete, light concrete, etc., intended to be supported in the vicinity of its angles for the production of a false- modular floor.
  • the tiles must be removable in order to allow access at all times to the power cables and equipment of the various aforementioned devices.
  • the aforementioned jacks supporting the slabs being adjustable, which allows rectify the unevenness of the base floor to obtain a good flatness of the raised sub-floor.
  • the slabs must have a minimum deflection under load which is linked to the bearing capacity. The less the slab bends, the more stable the support of the devices.
  • the slabs must also be of high dimensional accuracy so that, on the one hand, they can be laid edge to edge with practically no joints and, on the other hand, so that the lower and upper faces of the slabs, once laid, are located in two parallel planes, the regularity of the dimensions at the angles, where the slabs are supported by the jacks, being particularly important. Failure to comply with this latter requirement would destroy the viability and aesthetics of the raised floor, reduce its fire resistance and make cleaning and maintenance difficult.
  • the tiles must be light to allow easy installation and handling, but also because any increase in weight of the raised floor leads to a reduction in the admissible payload of the base floor.
  • the tiles must be able to withstand the fire as long as possible without losing their bearing capacity.
  • Said slabs must also have an acoustic attenuating power to avoid the propagation of sound due to the fact that the floor and the raised floor form a sounding board. Since the surface of a raised floor will never be a perfect multiple of the standard dimensions of a slab, it must be possible to cut in any direction while continuing to meet the above requirements.
  • the slab should have a wear-resistant upper surface which would be more decorative, which would make it unnecessary to lay, as is done on virtually all slabs used to date, a coating layer, such as carpet, synthetic material, rubber material, etc ...
  • the known slabs made of concrete have the particular disadvantage of having a too high weight because of their profile and their composition, while metal slabs, wooden slabs, metal-wood composite slabs or metal-light concrete, etc., have the particular disadvantage of having too large arrows under load, of offering insufficient resistance to fire, and of not offering acoustic attenuation.
  • the object of the invention is to remedy the drawbacks of known slabs and to provide a new reinforced concrete slab, of reduced density, with or without the addition of fibers, such as metallic fibers, having an upper surface resistant to wear and having an appearance that is decorative enough to require no coating, this slab also offering the advantage of simultaneously meeting all the requirements listed above.
  • the slab is made of reinforced concrete, the upper and lateral faces of the slab being flat, the latter having, from its lower face, cavities, regularly distributed and aligned in two transverse directions. , arranged so that their side walls delimit, on the one hand, with the underside of the slab, stiffening ribs extending and intersecting in the two above directions and, on the other hand, with the side faces of the slab and the underside thereof, a peripheral radiation rib.
  • the concrete constituting the slab is a light concrete, with a dry density between 850 and 1500 kg / m 3
  • the irons constituting the reinforcement of the slab are embedded in the aforementioned stiffening ribs, at least one iron being provided in each of the ribs, the irons embedded in the peripheral stiffening rib having a larger section than that of the irons embedded in the other ribs.
  • the section of the stiffening ribs is substantially constant over their entire length.
  • the section of the peripheral stiffening rib is substantially constant over the entire periphery of the slab while the section of the ribs extending inside the peripheral rib is variable, the dimension of these ribs taken perpendicularly to the upper face of the slab decreasing regularly from the periphery of the slab towards the center of the latter.
  • the light concrete is based on aggregates of a very reduced density such as expanded glass beads, expanded clay beads, polystyrene beads, etc. combined or not, fibers, preferably metallic, being distributed in a homogeneous way in the mass of concrete.
  • the self-supporting and removable concrete slab 1, according to the invention and shown in the drawings, is intended to be supported in the vicinity of its angles for the production of a modular raised floor.
  • This slab is made of reinforced concrete and its upper 2 and lateral 3 faces are flat, the slab having, from its lower face 4 cavities 5, regularly distributed and aligned in two transverse directions shown diagrammatically by the arrows 6 and 7, arranged so that their side walls 8 delimit, on the one hand, with the lower face 4 of the slab, ribs of stiffening 9 and 10 extending and intersecting in the two above directions and, on the other hand, with the lateral faces 3 of the slab and the lower face 4 of the latter, a peripheral stiffening rib 11.
  • the concrete constituting the slab is a light concrete with a dry density between 850 and 1500 kg / m 3 .
  • the bars 12 constituting the reinforcement of the slab are embedded in the stiffening ribs 9, 10 and 11, at least one iron 12 being provided in each of the ribs, the bars embedded in the peripheral stiffening rib 11 having a larger section as that of the irons embedded in the other ribs 9 and 10, said irons 12 are situated substantially at the same level and are joined together by welding to form a trellis.
  • the slab 1 illustrated in the drawings is a square slab and the two directions 6 and 7 are parallel to two contiguous sides of the slab.
  • the sections of the cavities 5, taken parallel to the upper face 2 of the slab have the same shape as the corresponding section of the slab.
  • the sections of the stiffening ribs 9, 10 and 11 by planes perpendicular to the aforementioned directions are substantially in the form of isosceles trapezoids, the small base of these trapezoids coinciding with the lower face 4 of the slab.
  • the section of the stiffening ribs 9, 10 and 11, by the above perpendicular planes, is substantially constant over their entire length.
  • said slab can have, as shown in FIGS. 3 and 4, a peripheral stiffening rib 11 which has a substantially constant section around the entire periphery of the slab, while the section of the ribs 9 and 10 extending inside the peripheral rib 10 is variable, the dimension of these ribs 9 and 10, corresponding to the height of the abovementioned trapezoids, decreasing regularly from the periphery of the slab towards the center of the latter.
  • the reinforcement of the concrete advantageously comprises metallic fibers, such as steel fibers, not shown, embedded in the entire mass of the stick constituting the slab.
  • the bottoms 13 of the cavities 5 are substantially planar and parallel to the upper face 2 of the slab.
  • the bottoms 13 of the latter are provided with stiffening ribs 14 extending from their center towards the walls 8 of the cavities.
  • the stiffening ribs 14 presented by the bottoms of the cavities can be substantially parallel to the two directions 6 and 7 above, these ribs 14 having, for example, a constant section in the form of an isosceles triangle, the base of the latter coinciding with the bottom 13 of the cavity 5.
  • the peripheral stiffening rib 11 may comprise a reinforcing element 15 associated, around the entire periphery of the slab, either at least part of the height of the side walls 3 of the slab, or at at least this part and at least part of the faces 20 of said peripheral rib, this element 15, intended to withstand shocks, being rigid and made of metal, plastic or even resin concrete.
  • this element 15 consists of profiles 16, assembled at the location of the side edges 17 of the slab, which have two wings 18 and 19, the wings 18 constituting the side walls 3 of the slab, while that their wings 19 constitute a part of the faces 20 of the peripheral rib 11 which are parallel to the upper face 2 of the slab.
  • the peripheral rib 11 is lined, at the location of the lateral edges 17 and on either side thereof, of reinforcing elements 15 each consisting of two sections 21 and 22, substantially equal, of a rigid profile, made of metal, plastic or resin concrete, having two wings 18 and 19.
  • These sections 21 and 22 are joined together by one of their ends and their wings 18 and 19 extend, in the vicinity of the edges 17 of the slab, over the entire height of the lateral faces 3 of the latter and over part of the width of the faces 20 specified tees of the peripheral rib 11.
  • the slab according to the invention advantageously has, at its upper face 2, a layer of material 24, wear resistant, which is integral with the concrete constituting the slab.
  • This layer of material 24 can be constituted by a concrete known by the name of terrazzo type concrete.
  • the upper face 2 is advantageously polished to give the slab the appearance of a tiling, as well as to facilitate the maintenance of the raised floor.
  • the concrete that constitutes this slab is composed, per m 3 , of approximately 875 liters of expanded glass beads of particle size 2/6, of approximately 493 kg of Rhine sand of particle size 0/2, of approximately 502 kg of Portland cement 50, approximately 5 kg of super-fluidizer, without steel fibers or with approximately 26 kg of steel fibers whose diameter is of the order of 0.4 mm and the length of which is of the order of 40 mm and of approximately 187 liters of water.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Building Environments (AREA)
  • Floor Finish (AREA)
EP84201312A 1983-09-21 1984-09-12 Selbsttragende Platte für einen doppelten Fussboden Withdrawn EP0135240A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE211562 1983-09-21
BE211562 1983-09-21

Publications (2)

Publication Number Publication Date
EP0135240A2 true EP0135240A2 (de) 1985-03-27
EP0135240A3 EP0135240A3 (de) 1986-03-19

Family

ID=3843682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84201312A Withdrawn EP0135240A3 (de) 1983-09-21 1984-09-12 Selbsttragende Platte für einen doppelten Fussboden

Country Status (1)

Country Link
EP (1) EP0135240A3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181171A (en) * 1985-09-27 1987-04-15 Intek Floors Ltd Concrete slab for a false or platform floor having strengthening ribs on the underside
GB2202248A (en) * 1987-02-06 1988-09-21 John Joseph Nash Insulating board with raised rib on one face at the periphery
EP0279278A3 (en) * 1987-02-19 1988-10-12 Mahle Gmbh Frame for a supported flooring panel of sectional false floors, especially for corners
GB2614906A (en) * 2022-01-24 2023-07-26 Dideco Ltd Composite floor construction

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295272A (en) * 1963-08-07 1967-01-03 Furukawa Casting Company Ltd Raised floor construction
FR1523900A (fr) * 1967-05-24 1968-05-03 Const Metalliques M G Sa Des Plancher surélevé réglable
CA854940A (en) * 1967-10-02 1970-11-03 H. Bruce James Construction panel and method of producing same
DE2307815B2 (de) * 1973-02-16 1976-01-02 Guenter H. 1000 Berlin Kiss Schall- und wärmedämmende Fußbodenplatte
US4067156A (en) * 1976-01-12 1978-01-10 Donn Products, Inc. Computer floor structure
GB2030630A (en) * 1978-09-29 1980-04-10 Rintoul Pty Ltd Floor Tile
FR2517714A1 (fr) * 1981-12-09 1983-06-10 Harnois Georges Procede et dispositif pour la realisation d'une aire de circulation ou plate-forme, sensiblement plane
CA1206346A (en) * 1983-11-04 1986-06-24 Richard P. Morris Concrete floor panel and floor system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2181171A (en) * 1985-09-27 1987-04-15 Intek Floors Ltd Concrete slab for a false or platform floor having strengthening ribs on the underside
EP0219985A3 (de) * 1985-09-27 1988-08-10 Intek Floors Limited Betonfliese für einen aufgeständerte Fussboden
GB2202248A (en) * 1987-02-06 1988-09-21 John Joseph Nash Insulating board with raised rib on one face at the periphery
GB2202248B (en) * 1987-02-06 1991-04-17 John Joseph Nash Insulation board
EP0279278A3 (en) * 1987-02-19 1988-10-12 Mahle Gmbh Frame for a supported flooring panel of sectional false floors, especially for corners
GB2614906A (en) * 2022-01-24 2023-07-26 Dideco Ltd Composite floor construction

Also Published As

Publication number Publication date
EP0135240A3 (de) 1986-03-19

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Inventor name: VAN ACKER, ARNOLD EMIEL MARIE

Inventor name: VERMEULEN, GHISLAIN GUSTAAF AMANDUS