EP0128832A2 - Permanent shuttering element in the form of a concrete board - Google Patents
Permanent shuttering element in the form of a concrete board Download PDFInfo
- Publication number
- EP0128832A2 EP0128832A2 EP84401179A EP84401179A EP0128832A2 EP 0128832 A2 EP0128832 A2 EP 0128832A2 EP 84401179 A EP84401179 A EP 84401179A EP 84401179 A EP84401179 A EP 84401179A EP 0128832 A2 EP0128832 A2 EP 0128832A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- concrete board
- shuttering element
- formwork element
- permanent shuttering
- 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- Withdrawn
Links
- 238000009416 shuttering Methods 0.000 title abstract 2
- 230000002787 reinforcement Effects 0.000 claims abstract description 8
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- 239000004793 Polystyrene Substances 0.000 claims abstract description 5
- 229920002223 polystyrene Polymers 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000009415 formwork Methods 0.000 claims description 13
- 239000011324 bead Substances 0.000 description 3
- 208000035992 Postmortem Changes Diseases 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- 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
- E04B2/84—Walls made by casting, pouring, or tamping in situ
- E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
- E04B2/8605—Walls made by casting, pouring, or tamping in situ made in permanent forms without spacers
-
- 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
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/049—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres completely or partially of insulating material, e.g. cellular concrete or foamed plaster
Definitions
- the present invention relates to a formwork element lost in the form of a concrete board.
- the present invention aims to provide a concrete board for formwork which retains the advantages of using wooden boards - lightness, possibility of sawing on site by hand or by machine - while having the characteristics necessary to advantageously be able to be left in place after pouring the concrete.
- the board is made of light insulating concrete reinforced mechanically by a skin reinforcement on at least one of its faces.
- Light insulating concrete is made from a mixture of hydraulic binders, polystyrene beads and water.
- the adhesion between the polystyrene beads and the paste is improved by the use of protein-based adjuvants of animal origin.
- the adjuvant used is atomized cruor at a rate of 1% of the weight of binder. The cruor can be replaced by liquid blood stabilized by the bacterial route, the dosage then being approximately 5% of the weight of hydraulic binder.
- the boards are manufactured to the desired dimensions by compression, vibration or other known process such as rolling, spinning or extrusion for example.
- the thickness of the boards is at least equal to 3 cm and can go up to 10 cm, a typical thickness being about 5 cm and the width is at least equal to 10 cm and can go up to a maximum lm, a typical width being about 20 cm.
- the length of the boards is determined according to requirements.
- the product obtained is particularly light.
- the density can vary between 300 kg / m and 800 kg / m 3 , or even 1,000 kg / m 3 .
- the mechanical reinforcement of the boards is carried out by means of a skin covering placed on one or both sides.
- This skin covering is for example produced in the form of a trellis made of mineral fibers (glass) or vegetable fibers (linen) placed in a cement slip or hydraulic binders.
- the boards manufactured as indicated above have mechanical properties largely sufficient for the envisaged application.
- a compressive strength greater than 1 MPa (10 bar) and a tensile strength by bending greater than 3 MPa (30 bar) (with skin reinforcements on both sides) can easily be achieved.
Abstract
Description
La présente invention a pour objet un élément de coffrage perdu en forme de planche en béton.The present invention relates to a formwork element lost in the form of a concrete board.
Actuellement, les planches en bois sont toujours très largement utilisées pour les coffrages de béton. Une fois le béton en place, ces planches sont démontées et nettoyées. Pour éviter cette dernière opération, il est connu d'utiliser des coffrages perdus. Il a en particulier été envisagé dans la demande de brevet français n° 78 11.587,déposée par le demandeur, d'utiliser des planches en béton, munies d'une armature en résille, pour former des coffrages perdus. Toutefois, ces planches en béton connues peuvent difficilement être découpées et sciées sur chantier, ce qui constitue un handicap certain par rapport aux planches de bois traditionnelles.Currently, wooden planks are still widely used for concrete formwork. Once the concrete is in place, these boards are dismantled and cleaned. To avoid this last operation, it is known to use lost formwork. It was in particular envisaged in the French patent application n ° 78 11.587, filed by the applicant, to use concrete planks, provided with a mesh reinforcement, to form lost formwork. However, these known concrete planks can hardly be cut and sawn on site, which constitutes a certain handicap compared to traditional wooden planks.
Aussi, la présente invention a-t-elle pour but de fournir une planche en béton pour coffrage qui conserve les avantages d'utilisation des planches en bois - légèreté, possibilité de sciage sur chantier à la main ou à la machine - tout en présentant les caractéristiques nécessaires pour pouvoir avantageusement être laissée en place après coulée du béton.Also, the present invention aims to provide a concrete board for formwork which retains the advantages of using wooden boards - lightness, possibility of sawing on site by hand or by machine - while having the characteristics necessary to advantageously be able to be left in place after pouring the concrete.
Ce but est atteint du fait que, conformément à l'invention, la planche est réalisée en béton isolant léger renforcé mécaniquement par une armature de peau sur au moins une de ses faces.This object is achieved because, in accordance with the invention, the board is made of light insulating concrete reinforced mechanically by a skin reinforcement on at least one of its faces.
L'utilisation du béton isolant léger permet effectivement d'obtenir un produit léger pouvant être facilement découpé aux dimensions voulues. En outre, utilisé comme coffrage perdu, il permet, d'une part, d'économiser le temps et la main d'oeuvre nécessaires .au démontage et au nettoyage des coffrages et, d'autre part, contribue à l'isolation thermique des parois. De plus encore, l'on retrouve dans l'application comme coffrage perdu les qualités de durabilité et d'ininflammabilité du béton isolant léger, et l'on dispose d'un produit qui est compatible avec le béton coulé in-situ et qui permet un bon accrochage des enduits plastiques ou traditionnels.The use of light insulating concrete effectively makes it possible to obtain a light product which can be easily cut to the desired dimensions. In addition, used as a lost formwork, it saves, on the one hand, the time and labor required for the dismantling and cleaning of the formwork and, on the other hand, contributes to the thermal insulation of walls. In addition, we find in the application as a lost formwork the qualities of durability and inflam light insulating concrete, and there is a product which is compatible with concrete poured in situ and which allows good adhesion of plastic or traditional coatings.
Le béton isolant léger est réalisé à partir d'un mélange de liants hydrauliques, billes de polystyrène et eau. L'adhérence entre les billes de polystyrène et la pâte est améliorée par l'utilisation d'adjuvants à base de protéines d'origine animale. Dans une réalisation préférée, l'adjuvant utilisé est du cruor atomisé à raison de 1 % du poids de liant. Le cruor peut être remplacé par du sang liquide stabilisé par voie bactérienne, le dosage étant alors d'environ 5 X du poids de liant hydraulique.Light insulating concrete is made from a mixture of hydraulic binders, polystyrene beads and water. The adhesion between the polystyrene beads and the paste is improved by the use of protein-based adjuvants of animal origin. In a preferred embodiment, the adjuvant used is atomized cruor at a rate of 1% of the weight of binder. The cruor can be replaced by liquid blood stabilized by the bacterial route, the dosage then being approximately 5% of the weight of hydraulic binder.
Les planches sont fabriquées aux dimensions voulues par compression, vibration ou autre procédé connu tel que laminage, filage ou extrusion par exemple.The boards are manufactured to the desired dimensions by compression, vibration or other known process such as rolling, spinning or extrusion for example.
De préférence, l'épaisseur des planches est au moins égale à 3 cm et peut aller jusqu'à 10 cm, une épaisseur type étant d'environ 5 cm et la largeur est au moins égale à 10 cm et peut aller jusqu'à un maximum de lm, une largeur type étant d'environ 20 cm. La longueur des planches est déterminée en fonction des besoins.Preferably, the thickness of the boards is at least equal to 3 cm and can go up to 10 cm, a typical thickness being about 5 cm and the width is at least equal to 10 cm and can go up to a maximum lm, a typical width being about 20 cm. The length of the boards is determined according to requirements.
Le produit obtenu est particulièrement léger. En fonction des quantités respectives de liant et de billes de polystyrène, la masse volumique peut varier entre 300 kg/m et 800 kg/m3, voire 1.000 kg/m3.The product obtained is particularly light. Depending on the respective quantities of binder and polystyrene beads, the density can vary between 300 kg / m and 800 kg / m 3 , or even 1,000 kg / m 3 .
Le renforcement mécanique des planches est réalisé au moyen d'un revêtement de peau disposé sur une des faces ou sur les deux. Ce revêtement de peau est par exemple réalisé sous forme d'un treillis en fibres minérales (verre) ou végétales (lin) mis en place dans une barbotine de ciment ou liants hydrauliques. Malgré cette armature de peau et, d'autre part, en raison de la nature du béton utilisé et de l'absence d'armature interne, la découpe peut facilement être effectuée sur chantier par sciage à la main.The mechanical reinforcement of the boards is carried out by means of a skin covering placed on one or both sides. This skin covering is for example produced in the form of a trellis made of mineral fibers (glass) or vegetable fibers (linen) placed in a cement slip or hydraulic binders. Despite this skin reinforcement and, on the other hand, due to the nature of the concrete used and the absence of internal reinforcement, the cut can easily be carried out on site by sawing by hand.
Les planches fabriquées comme indiqué ci-dessus présentent des propriétés mécaniques largement suffisantes pour l'application envisagée.The boards manufactured as indicated above have mechanical properties largely sufficient for the envisaged application.
A titre indicatif, une résistance à la compression supérieure à 1 MPa (10 bars) et une résistance en traction par flexion supérieure à 3 MPa (30 bars) (avec armatures de peau sur les deux faces) peuvent aisément être atteintes.As an indication, a compressive strength greater than 1 MPa (10 bar) and a tensile strength by bending greater than 3 MPa (30 bar) (with skin reinforcements on both sides) can easily be achieved.
Bien entendu, diverses modifications ou adjonctions pourront être apportées au mode de réalisation décrit plus haut d'un élément de coffrage perdu selon l'invention sans pour cela sortir de la protection définie par les revendications annexées.Of course, various modifications or additions can be made to the embodiment described above of a formwork element lost according to the invention without thereby departing from the protection defined by the appended claims.
Claims (4)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8309750A FR2547338B1 (en) | 1983-06-13 | 1983-06-13 | LOST FORMWORK CONCRETE FORM |
| FR8309750 | 1983-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0128832A2 true EP0128832A2 (en) | 1984-12-19 |
| EP0128832A3 EP0128832A3 (en) | 1985-08-21 |
Family
ID=9289726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP84401179A Withdrawn EP0128832A3 (en) | 1983-06-13 | 1984-06-07 | Permanent shuttering element in the form of a concrete board |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0128832A3 (en) |
| ES (1) | ES8600449A1 (en) |
| FR (1) | FR2547338B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002861A1 (en) * | 1989-08-17 | 1991-03-07 | Markus Stracke | Process for using lightweight concrete |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007061276A1 (en) * | 2005-11-23 | 2007-05-31 | Muros R De Mexio, Sociedad De Responsabilidad Limitada De Capital Variable | Modular construction system for the construction of reinforced concrete walls, using lightweight concrete permanent formwork |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1125726A (en) * | 1954-06-04 | 1956-11-06 | Siporex Int Ab | Process for the production of so-called elements |
| CH442677A (en) * | 1966-06-29 | 1967-08-31 | Allmen Marc Von | Method of constructing a building using prefabricated elements and building obtained by this process |
| FR1513329A (en) * | 1966-10-17 | 1968-02-16 | Construction process for a load-bearing, waterproof, isothermal and isophone wall | |
| DE1559585A1 (en) * | 1964-08-17 | 1970-03-05 | Kruschandl Edward Victor | Formwork element for the production of concrete walls and method for erecting buildings using such formwork elements |
-
1983
- 1983-06-13 FR FR8309750A patent/FR2547338B1/en not_active Expired
-
1984
- 1984-06-07 EP EP84401179A patent/EP0128832A3/en not_active Withdrawn
- 1984-06-12 ES ES533334A patent/ES8600449A1/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1125726A (en) * | 1954-06-04 | 1956-11-06 | Siporex Int Ab | Process for the production of so-called elements |
| DE1559585A1 (en) * | 1964-08-17 | 1970-03-05 | Kruschandl Edward Victor | Formwork element for the production of concrete walls and method for erecting buildings using such formwork elements |
| CH442677A (en) * | 1966-06-29 | 1967-08-31 | Allmen Marc Von | Method of constructing a building using prefabricated elements and building obtained by this process |
| FR1513329A (en) * | 1966-10-17 | 1968-02-16 | Construction process for a load-bearing, waterproof, isothermal and isophone wall |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991002861A1 (en) * | 1989-08-17 | 1991-03-07 | Markus Stracke | Process for using lightweight concrete |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2547338A1 (en) | 1984-12-14 |
| ES533334A0 (en) | 1985-09-16 |
| FR2547338B1 (en) | 1986-05-30 |
| ES8600449A1 (en) | 1985-09-16 |
| EP0128832A3 (en) | 1985-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE GB IT LI LU NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE GB IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19860210 |
|
| 17Q | First examination report despatched |
Effective date: 19870310 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19870721 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: AUBRY, BERNARD RENE Inventor name: BRUSIN, MICHEL GERARD |