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EP0848775B1 - Procede de moulage d'une plaque de plancher en beton - Google Patents

Procede de moulage d'une plaque de plancher en beton Download PDF

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Publication number
EP0848775B1
EP0848775B1 EP96930476A EP96930476A EP0848775B1 EP 0848775 B1 EP0848775 B1 EP 0848775B1 EP 96930476 A EP96930476 A EP 96930476A EP 96930476 A EP96930476 A EP 96930476A EP 0848775 B1 EP0848775 B1 EP 0848775B1
Authority
EP
European Patent Office
Prior art keywords
floor structure
heat
slab
lower side
sound insulating
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.)
Expired - Lifetime
Application number
EP96930476A
Other languages
German (de)
English (en)
Other versions
EP0848775A1 (fr
Inventor
Sven-Hugo Thorstensson
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.)
Legalett International AB
Original Assignee
Legalett International 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 Legalett International AB filed Critical Legalett International AB
Publication of EP0848775A1 publication Critical patent/EP0848775A1/fr
Application granted granted Critical
Publication of EP0848775B1 publication Critical patent/EP0848775B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/22—Connection of slabs, panels, sheets or the like to the supporting construction

Definitions

  • the invention relates to a method in concreting a floor structure slab, preferably a floor slab in an intermediate floor structure underfloor heating elements being embedded into the slab, such as ducts for circulating hot air for supplying heat to the floor slab in order to satisfy the heat requirement of the upper floor.
  • the floor slab has a good heat insulation on the lower side thereof and that the floor covering material applied to the upper side of the floor slab is not greatly heat insulating in order that the desired heat transmission to the upper floor will be obtained, and at the other hand that the concrete floor structure is provided with some type of sound insulation at the upper side thereof in order to obtain an acceptable sound reduction between the floors, which is contrary to the requirements for the heat transmission because such sound insulation also provides increased heat insulation.
  • the invention provides a method in concreting a floor structure slab wherein the lower side of the floor structure is concreted against a panel provided as a formwork element which has a heat and sound insulating layer between surface layers and is allowed to remain at the lower side of the floor structure slab after setting of the concrete.
  • FR-A-2 098 568 discloses a panel of this type wherein the insulating layer is supported by a metal sheet cassette.
  • the method of the invention has the characterizing features of claim 1
  • the invention also relates to an intermediate floor structure with a concrete floor slab with underfloor heating elements embedded therein according to claim 10.
  • the invention provides the advantage that the floor structure can be manufactured at lower costs and less efforts in relation to the technique now used wherein either a pre-fabricated thin concrete slab (usually having a thickness of 40 mm) is used as formwork element and then is allowed to form part of the floor structure, or conventional formwork is used the formwork being stripped and the elements thereof being cleaned after concreting. In both cases the heat insulation must be attached to the floor slab at the lower side thereof special expensive studs being used in order to satisfy existing requirements as to sound insulation.
  • the heat and sound insulating panel used in the method and the intermediate floor structure according to the invention preferably comprises a sandwich element having an intermediate heat and sound insulating layer of foamed plastic or the like, and surface layers of plywood.
  • a special smart feature of the preferred embodiment of the invention is that the sandwich element functioning as formwork element is attached to the floor slab by means of sound absorbing attachments so that the sandwich element after concreting of the floor slab can be lowered from the lower side thereof an air gap being formed between the floor slab and the sandwich element improving the sound absorbing properties of the floor structure.
  • the upper sound insulation then can be reduced and the heat supply to the upper floor be improved.
  • the width of the sound insulating gap can be determined by calculation or by local tests.
  • a further advantage of the invention is that a sandwich element of the kind referred to above easily can be provided on the lower side thereof with a covering of of any kind e.g. gypsum plaster board.
  • FIG. 1 In a building there shall be concreted according to FIG. 1 a floor slab 10 on formwork elements 11 which are supported at a correct level by conventional props 12. If Legalett® heating system shall be installed ducts 13 should be embedded into the floor structure for circulating hot air as indicated in the drawing, but other floor heating elements can be embedded into the concrete. Also necessary steel reinforcement should be embedded into the concrete though this has not been shown in the drawing, and in order to reduce the weight of the floor structure also foamed plastic bodies can be embedded into the concrete.
  • the formwork elements are of a special embodiment; reference is made also to FIG. 4. They comprise sandwich elements having a core 14 of a suitable heat and sound insulating rigid material such as foamed plastic or cemented mineral wool board. Surface layers 15 are attached (by gluing) to both sides of the core 14.
  • the surface layers can comprise plywood panels, gypsum plaster boards, metal sheet, or any other material suitable for the purpose.
  • the sandwich element has a core 14 of foamed plastic having a thickness of 50 mm, and surface layers of 6.5 mm plywood and is made in conventional modular size of 1.2 x 2.4 m.
  • Such a sandwich element has a weight which allows manual handling thereof, which is of course a substantial advantage from an ergonomic point of view. Due to the sandwich structure the sandwich element is sufficiently rigid in order to serve as a formwork element at concreting of the slab.
  • the fastening element includes a metal socket 17 forming a flange 18 at one end thereof, an anchoring stirrup 19, a cross-shaped element, or an element of another shape which can provide a good anchorage in the concrete being attached to the other end of the socket.
  • the anchorage stirrup is used for anchoring and accurately fixing installations (ducts for air circulation, building installation pipes, electrical wiring pipes etc.) so that they are prevented from floating up or changing position during concreting.
  • the fastening element is provided with flaps 19A having apertures wherein such anchoring can take place.
  • a threaded blind hole 20 extends from the end of the socket 17 where the flange 18 is located nearly to the other end of the socket.
  • a screw bolt 21 is screwed into the blind hole.
  • a metal washer 22 is provided on the bolt between the head thereof and a block 23 of sponge rubber or similar material. The bolt passes with clearance through an aperture 24 in the upper plywood panel 15, the block 23, the washer 22, and the bolt head being received in a wider aperture 25 extending through the lower plywood panel 15 and the insulating layer 14.
  • the bolt 21 is tightened with the flange 18 and the block 23 engaging opposite sides of the upper plywood panel and with the socket 17 projecting from the upper side of the upper plywood panel to be embedded into the concrete as shown in FIG. 1.
  • the sandwich element has now fulfilled its task as formwork element but is allowed to remain on the concrete slab 10 engaging tightly the lower side thereof and securely anchored in the slab by means of the fastening elements 16 in order now to serve as a heat and sound insulating layer at the lower side of the concrete slab.
  • the attachment in the slab as made sound absorbing by means of the block 23 of sponge rubber or the like. This sound absorption can, however, be provided in another manner than that shown herein by using any of the elements existing on the market for vibration absorbing suspension of machines or the like. It is also possible to replace the fastening elements shown and described by simple wall ties attached to the sandwich element and anchored to the reinforcement or the ducts in the concrete slab or solely in the concrete itself.
  • the purpose of heat and sound insulating sandwich element at the lower side of the concrete slab is to attenuate the heat transmission at the lower side of the floor structure so that the heat transmitted to the concrete slab by the ducts or other underfloor heating elements is directed upwards to the space above the floor structure.
  • the purpose of the sandwich element is also to attenuate the sound transmission through the floor structure particularly the transmission of impact sound from the upper floor to the lower floor.
  • the sandwich element can be provided with a suitable ceiling lining at the lower side thereof e.g. gypsum plaster boards 26, FIG. 5, which covers the apertures 25.
  • the sound insulation of the floor structure fabricated as described above can be improved in a very simple manner.
  • the sandwich element In order that the sandwich element will not adhere to the slab it should be coated with form oil at the upper side thereof before concreting so that it will be easily released from the concrete slab when it shall be lowered.
  • a plastic foil can instead be provided at the upper side of the sandwich element. The width of the gap has to be determined by calculations or local measurements.
  • FIG. 6 discloses the result of impact sound measurements according to Swedish standard SIS 02 52 54 within the standardised frequency interval ranging from 100 to 3150 Hz for an intermediate floor structure according to FIG. 2 with heating ducts 13 embedded therein and with a surface weight of the concrete slab of 460 kg/m 2 .
  • the measurements refer to a space volume of 27.5 m 3 .
  • the sandwich element 11 had a core 14 of foamed plastic having a thickness of 50 mm, and the two surface layers 15 consisted of 6.5 mm plywood. At the lower side on the lower plywood panel there was attached a 13 mm gypsum plaster board as shown at 26 in FIG. 5.
  • the fine graph represents the measured values according to the columns to the right of the diagram while the bold graph is the reference graph for impact sound level inserted in accordance with the standard mentioned above. As will be seen the measured graph is located substantially below the reference graph particularly in the lower frequency range which is of special interest in this connection.
  • the value of the weighted impact sound level Lnw calculated in accordance with the standard mentioned was at 73 dB.
  • FIG. 7 discloses the results of a corresponding measurement with the sandwich panel 11 lowered 40 mm according to FIG. 3. Then, there was obtained a value of Lnw of 72 dB, and also in this case the measured graph is located considerably below the reference graph and moreover also at higher frequencies.
  • FIG. 8 discloses a comparison of the measured graphs in FIGS. 6 and 7 in order to illustrate the improvement of the impact sound insulation obtained by lowering the sandwich element the solid graph corresponding to that in FIG. 6 and the dashed graph corresponding to that in FIG. 7.
  • FIGS. 9 and 10 refer to corresponding measurements as those in FIGS. 6 and 7 but with a plastics floor covering at the upper side of the floor structure, and in this case there is obtained a more accentuated improvement of the impact sound insulation.
  • FIG. 9 with the sandwich element engaging tightly the lower side of the floor slab Lnw was 62 dB, and according to FIG. 10 with a 40 mm gap between the floor slab and the sandwich element Lnw was 54 dB.
  • the invention Besides allowing a simplification of the method in concreting a floor structure by using an element of the floor structure, viz. the sandwich element, as a formwork element at concreting the invention also provides an improved sound insulation as compared with conventionally concrete floor structures, combined with the possibility of directing the heat transmission from heating ducts embedded into the floor structure, to the floor space located above the floor structure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Panels For Use In Building Construction (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Floor Finish (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bathtub Accessories (AREA)
  • Road Paving Structures (AREA)

Claims (11)

  1. Procédé pour le bétonnage d'une dalle (19) de structure de plancher dans lequel le côté inférieur de la structure de plancher est bétonné contre un panneau (11) prévu en tant qu'élément de coffrage qui comporte une couche (14) d'isolation thermique et sonique entre des couches (15) de surface et qui peut rester sur le côté inférieur de la dalle de structure de plancher après la prise du béton, caractérisé en ce que le panneau (11) prévu en tant qu'élément de coffrage comprend un élément sandwich ayant une âme en matière rigide formant la couche (14) d'isolation thermique et phonique, et, en tant que couches de surface, des panneaux de contreplaqué fixés aux deux côtés de l'âme.
  2. Procédé selon la revendication 1,
       caractérisé en ce que des éléments de fixation (16) pour le panneau (11) d'isolation thermique et phonique sont enrobés par le bétonnage dans la dalle (10) de la structure de plancher.
  3. Procédé selon la revendication 2,
       caractérisé en ce que la liaison entre les éléments (16) de fixation et le panneau (11) d'isolation thermique et phonique est pourvue de moyens (23) absorbant les sons.
  4. Procédé selon l'une quelconque des revendications 1 à 3,
       caractérisé en ce que le panneau (11) d'isolation thermique et phonique est laissé sur le côté inférieur de la dalle (10) de structure de plancher en contact étroit avec le côté inférieur.
  5. Procédé selon l'une quelconque des revendications 1 à 3,
       caractérisé en ce que le panneau (11) d'isolation thermique et phonique, après la prise du béton, est abaissé depuis le côté inférieur de la dalle (10) de structure de plancher, un espace (27) étant formé entre le côté inférieur de la dalle de la structure de plancher et le côté supérieur du panneau.
  6. Procédé selon les revendications 2 ou 3 et 5,
       caractérisé en ce que les éléments de fixation sont réalisés de façon à être réglables pour régler la largeur de l'espace entre la dalle (10) de sturcture de plancher et le panneau (11) d'isolation thermique et phonique.
  7. Procédé selon l'une quelconque des revendications 1 à 6,
       caractérisé en ce que des éléments (13) de chauffage par le plancher sont noyés par le bétonnage dans la dalle (10) de la structure de plancher.
  8. Procédé selon la revendication 7,
       caractérisé en ce que les éléments (13) de chauffage par le plancher comprennent des canalisations pour la circulation d'air chaud.
  9. Structure de plancher intermédiaire ayant une dalle (10) de structure de plancher en béton dans laquelle sont noyés des éléments (13) de chauffage par le plancher, et un panneau (11) d'isolation thermique et phonique prévu sur le côté inférieur de la dalle de la structure de plancher, caractérisée en ce que le panneau (11) d'isolation thermique et phonique comprend un élément du type sandwich ayant une âme formée d'une matière d'isolation thermique et phonique (14) et des panneaux de contreplaqué prévus en tant que couches de surface, qui sont fixés aux deux côtés de l'âme.
  10. Structure de plancher intermédiaire selon la revendication 9, caractérisée en ce qu'un espace (27) est formé entre le côté inférieur de la dalle (10) de structure de plancher et le côté supérieur de l'élément du type sandwich (11).
  11. Structure de plancher intermédiaire selon la revendication 10, caractérisée en ce que des éléments réglables (16) de liaison sont prévus entre la dalle (10) de la structure de plancher et l'élément du type sandwich (11) pour la chaleur pour régler la largeur de l'espace.
EP96930476A 1995-09-08 1996-09-06 Procede de moulage d'une plaque de plancher en beton Expired - Lifetime EP0848775B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9503089 1995-09-08
SE9503089A SE504954C2 (sv) 1995-09-08 1995-09-08 Sätt vid gjutning av bjälklagsplatta av betong samt mellanbjälklag
PCT/SE1996/001108 WO1997009493A1 (fr) 1995-09-08 1996-09-06 Procede de moulage d'une plaque de plancher en beton

Publications (2)

Publication Number Publication Date
EP0848775A1 EP0848775A1 (fr) 1998-06-24
EP0848775B1 true EP0848775B1 (fr) 2000-04-19

Family

ID=20399401

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96930476A Expired - Lifetime EP0848775B1 (fr) 1995-09-08 1996-09-06 Procede de moulage d'une plaque de plancher en beton

Country Status (9)

Country Link
EP (1) EP0848775B1 (fr)
AT (1) ATE191949T1 (fr)
AU (1) AU6949596A (fr)
DE (1) DE69607848T2 (fr)
DK (1) DK0848775T3 (fr)
NO (1) NO311734B1 (fr)
PL (1) PL325464A1 (fr)
SE (1) SE504954C2 (fr)
WO (1) WO1997009493A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19930693C1 (de) * 1999-07-05 2000-12-28 Rolltec Heizsysteme Produktion Verfahren zur Herstellung einer Betondecke
NL1026388C2 (nl) * 2004-06-11 2005-12-15 O & P Res And Dev Werkwijze voor het vervaardigen van een bouwconstructie, alsmede bekisting daarvoor.
CN100404764C (zh) * 2005-04-15 2008-07-23 黄振利 保温隔热楼地面
RU2303681C1 (ru) * 2005-12-29 2007-07-27 Владимир Лазаревич Чернявский Способ возведения перекрытия или пролета сооружения
DE102016012948A1 (de) * 2016-10-28 2018-05-17 Meier Betonwerke Gmbh Vorgefertigte, multifunktionale Unterdecke
RU186152U1 (ru) * 2018-09-26 2019-01-11 Федеральное государственное бюджетное образовательное учреждение образования "Владимирский Государственный Университет имени Александра Григорьевича и Николая Григорьевича Столетовых" (ВлГУ) Сборно-монолитное покрытие одноэтажного производственного здания при пролетах 18, 24, 30 м и увеличенном шаге поперечных осей

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2098568A5 (fr) * 1970-07-10 1972-03-10 Catesson Claude
SE445569B (sv) * 1983-01-03 1986-06-30 Dobel Ab Kassett vid gjutning av bjelklag

Also Published As

Publication number Publication date
SE504954C2 (sv) 1997-06-02
NO311734B1 (no) 2002-01-14
DE69607848D1 (de) 2000-05-25
PL325464A1 (en) 1998-07-20
WO1997009493A1 (fr) 1997-03-13
ATE191949T1 (de) 2000-05-15
EP0848775A1 (fr) 1998-06-24
NO981030L (no) 1998-05-07
NO981030D0 (no) 1998-03-09
AU6949596A (en) 1997-03-27
DE69607848T2 (de) 2000-11-02
SE9503089L (sv) 1997-03-09
DK0848775T3 (da) 2000-09-25
SE9503089D0 (sv) 1995-09-08

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