EP2540934B1 - Revêtement pour coffrage à coulages en béton - Google Patents

Revêtement pour coffrage à coulages en béton Download PDF

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Publication number
EP2540934B1
EP2540934B1 EP20120004372 EP12004372A EP2540934B1 EP 2540934 B1 EP2540934 B1 EP 2540934B1 EP 20120004372 EP20120004372 EP 20120004372 EP 12004372 A EP12004372 A EP 12004372A EP 2540934 B1 EP2540934 B1 EP 2540934B1
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EP
European Patent Office
Prior art keywords
covering
formwork
layer
concrete
sheet
Prior art date
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Active
Application number
EP20120004372
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German (de)
English (en)
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EP2540934A1 (fr
Inventor
Matteo Mondelli
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air

Definitions

  • the present invention relates to a covering for formwork for concrete castings.
  • the present invention relates to a covering for formwork for the realisation of building works in reinforced or non-reinforced concrete.
  • Formworks or moulds are used to realise building works in reinforced concrete and define the casings inside which the concrete casting is made in the liquid state and in which it remains until the end of the setting and hardening process; the casting remains inside the formwork or mould until its mechanical resistance is such as to guarantee absorption of the stresses to which the structure is subject immediately after the formwork or mould removal step.
  • the formwork or mould has a geometric function, in that it makes it possible to give the concrete casting the desired shape and, at the same time, has a mechanical function in that it must not deform and must sustain the pressure which the casting exerts on its walls and the vibrations of compaction; in addition, the formwork must ensure a tight seal avoiding the danger of leakages of material causing the formation of a casting with a spongy or gravel nest structure.
  • the inner walls of the formwork must be covered with a layer of form release agent suitable for creating an insulating film between the formwork and the concrete; the specific chemical agents present in the form release agent assist the detachment of the cement paste from the surfaces of the formwork.
  • Formworks or moulds may be made in various materials such as wood, polystyrene (ICF method- Insulated Concrete Form) or equivalent known plastic or metal materials; the chemical composition of the form release agent varies depending on the type of material the mould is made of.
  • Wooden formworks are characterised by their low cost and high flexibility in terms of application and assembly. However, they have the drawback of being utilisable only a few times since over time the wood tends to become rigid, heavy and no longer transpires; moreover, the wood leaves an impression on the concrete which acquires the reverse pattern of the grains and knots with a consequent aesthetic limitation.
  • Another solution consists of using formworks or moulds made with ICF technology (Insulated Concrete Form) using polystyrene foam which, compared to those made in wood, ensures improved performance, increased versatility and reduced costs:
  • Formworks or moulds may also be made from metal so as to be able to be used over and over again and guarantee a particularly superior surface finish.
  • Such types of formworks have disadvantages related to the considerable costs and reduced flexibility of application caused by the fact that they cannot be shaped directly on site but must be pre-fabricated.
  • a form release agent that is a emulsified or aqueous solution which as well as facilitating the detachment of the product, ensures a quality surface finish free of bubbles and the like.
  • a further drawback is related to the complex and laborious removal operation of the layer of form release agent from the formwork or mould once the product has been obtained, so as to prepare the same for a subsequent use.
  • a further drawback is represented by the fact that with traditional formworks is it not possible to obtain products with particular surface finishes (for example, parallel lines, lozenges, squares etc) except by using ad hoc formworks.
  • GB 2 233 601 concerns a covering for formwork, said covering being formed by a tape or sheet which is suitable for being wound on a reel.
  • the multi-layer structure of the tape or sheet comprises a layer made of a polyolefin resin film which prevents adhesion of the covering to the concrete casting, and a layer made of non-woven fabric.
  • the purpose of the present invention is to overcome the drawbacks mentioned above.
  • the purpose of the present invention is to provide a covering for formwork for concrete castings which is easy, simple and fast to apply.
  • a further purpose of the present invention is to provide a covering for formwork which ensures easy detachment of the product from the formwork.
  • a further purpose of the present invention is to provide a covering for formwork which enables a high quality product in terms of surface finish to be obtained.
  • a further purpose of the present invention is to provide a covering for formwork suitable for ensuring limited costs.
  • the covering for formwork for concrete castings of the present invention is defined by a tape or sheet 12 wound to form a reel 14 from which it is unwound and cut to the desired length for the specific applications described further below.
  • the tape or sheet 12 of the covering 10 is defined by a multilayer structure which comprises at least two and preferably three layers, a first layer 16 defined by an adhesive material such as to enable its attachment to the inner walls of a formwork or mould 22, a second layer 18 defined by a film in polyolefin material having the function of preventing adherence with the concrete casting 24 which fills the formwork 22 and an intermediate layer 20 defined by an expanded or foam material preferably but not exclusively of the polyolefin or polyethylene type able to support the dilations and absorb the stresses and shrinkage of the concrete during the setting and subsequent hardening process and to enable, combined with the second layer 18, the smoothing out of any discontinuities of the mould (such as the grains of the wood) .
  • the first layer 16 defined by adhesive material may be absent; in such case the sheet 12 of the covering 10 is stapled to the formwork.
  • the intermediate layer 20 if suitably moulded on its surface, enables the transfer to the concrete structure of predefined and regular surface effects having an aesthetic function or functional to the adhesion of plaster or the like.
  • composition of the film making up the second layer 18 and the foam defining the intermediate layer 20 is defined depending on the specific use, on the type of formwork or mould and on the characteristics of the concrete.
  • the thickness of said layers is also scaled in relation to specific requirements; typically, but not exclusively, the thickness of the second layer 18 has a minimum value of 5 ⁇ m, while that of the intermediate layer 20 has a minimum thickness equal to 0.3 mm.
  • a formwork or mould 22 provided with the covering 10 of the invention and filled with the concrete casting 24 is shown in schematic form.
  • the inner walls of the formwork or mould 22 are "glined" with the covering 10; in particular, the first layer 16, defined by the adhesive layer, adheres to the walls or inner surfaces of the mould 22, while the second layer 18, defined by the polyolefin or polyethylene or other type film suitable for the purpose, is in contact with the concrete 24.
  • the covering of the walls or inner surfaces of the formwork or mould 22 is complete, it is assembled to receive the concrete casting. As may be seen from the above, the advantages achieved by the covering for formwork for concrete castings of the present invention are evident.
  • the covering for formwork for concrete castings of the present invention makes it possible to cover the inner walls of the formwork whether made of wood, metal, polystyrene or other plastic material suitable for the purpose, simply, easily and rapidly.
  • a further advantage is represented by the fact that at the end of the setting and hardening process of the concrete, the covering which the invention relates to can be easily removed from the formwork, which is rapidly cleaned and reutilised.
  • the covering for formwork of the invention when applied to the wooden formwork, makes it possible to eliminate any characteristic grains which the mould transfers to the concrete casting, thereby ensuring a superior surface finish as well as a high quality appearance, is of further advantage.
  • a further advantage is represented by the fact that by being fast and easy to apply and remove, the covering for formwork of the invention does not requiring subsequent processing of the product in relation to the surface finish, making it possible to reduce production costs.
  • the covering of the invention makes it possible to give the product different surface finishes of the smooth type or with parallel lines, lozenges or other geometrical figures with both aesthetic and functional purposes to improve the adhesion of any subsequent plaster, is of further advantage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Nozzles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Claims (8)

  1. Revêtement (10) pour coffrage (22) à coulages en béton (24) armé ou non, pour la réalisation d'ouvrages de construction de façon à recouvrir les parois ou surfaces internes du coffrage constitué de bois, plastique ou métal, ledit revêtement étant défini par une bande ou une feuille (12) que l'on peut enrouler sur une bobine (14) à partir de laquelle on peut la dérouler et la découper, et caractérisé en ce qu'il comprend au moins deux couches, dont l'une (25) est en matériau polyoléfine pour empêcher toute adhésion avec le coulage en béton (24) et l'autre est en matériau expansé ou en mousse, respectivement, pouvant supporter les dilatations et absorber les contraintes et le rétrécissement du béton pendant la prise et pendant le processus de durcissement qui s'ensuit.
  2. Revêtement pour coffrage selon la revendication 1, caractérisé en ce que la bande ou la feuille (12) comprend une autre couche permettant une fixation aux parois internes du coffrage ou du moule (22).
  3. Revêtement pour coffrage selon l'une des revendications précédentes, caractérisé en ce que l'autre couche permettant une fixation au coffrage est définie par une première couche (16) en matière adhésive, que la couche permettant d'empêcher l'adhérence du coulage en béton est définie par une seconde couche (18) composée d'un film en matériau polyoléfine et que la couche permettant de supporter les dilatations et d'absorber les contraintes et le rétrécissement du béton est définie par une couche intermédiaire (20).
  4. Revêtement pour coffrage selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la couche intermédiaire (20) est définie par un matériau de type polyoléfine ou polyéthylène.
  5. Revêtement pour coffrage selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'épaisseur de la seconde couche (18) a une valeur minimale de 5 µm et l'épaisseur de la couche intermédiaire (20) a une valeur minimale égale à 0,3 mm.
  6. Revêtement pour coffrage selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la couche intermédiaire (20) de la bande ou feuille (12) a une surface présentant une extension plate.
  7. Revêtement pour coffrage selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la couche intermédiaire (20) de la bande ou feuille (12) a une surface présentant une extension conformée.
  8. Revêtement pour coffrage selon la revendication 1, caractérisé en ce que la feuille (12) du revêtement (10) est agrafée au coffrage (22).
EP20120004372 2011-06-27 2012-06-08 Revêtement pour coffrage à coulages en béton Active EP2540934B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001169A ITMI20111169A1 (it) 2011-06-27 2011-06-27 Rivestimento per casseforma per getti in calcestruzzo

Publications (2)

Publication Number Publication Date
EP2540934A1 EP2540934A1 (fr) 2013-01-02
EP2540934B1 true EP2540934B1 (fr) 2014-07-23

Family

ID=44898754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20120004372 Active EP2540934B1 (fr) 2011-06-27 2012-06-08 Revêtement pour coffrage à coulages en béton

Country Status (2)

Country Link
EP (1) EP2540934B1 (fr)
IT (1) ITMI20111169A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6523644B2 (ja) * 2014-09-29 2019-06-05 大和ハウス工業株式会社 コンクリート養生シートおよびコンクリート施工方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3702180A (en) * 1970-03-23 1972-11-07 Robert L Jones Mold for casting concrete panels
CA2016367A1 (fr) * 1989-05-16 1990-11-16 Mitsuo Matsumoto Methode de fabrication d'une pellicule de revetement a base de resine
US5098059A (en) * 1990-04-11 1992-03-24 Sawyer Robert D Concrete forming member for use in concrete casting
US5824347A (en) * 1996-09-27 1998-10-20 E. I. Du Pont De Nemours And Company Concrete form liner
DE29810121U1 (de) * 1998-06-05 1999-08-05 Beutler, Michael, 97340 Marktbreit Vorrichtung zum Aufbringen einer Drainageschicht auf eine Schalwand einer Betonschalung
IT1305423B1 (it) * 1998-11-19 2001-05-04 Gor Applic Speciali Srl Pannello composito multistrato, particolarmente adatto per casseforme,in special modo di solai.

Also Published As

Publication number Publication date
ITMI20111169A1 (it) 2012-12-28
EP2540934A1 (fr) 2013-01-02

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