EP1178880B1 - Toile de protection destinee au coulage du beton dans un moule - Google Patents

Toile de protection destinee au coulage du beton dans un moule Download PDF

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Publication number
EP1178880B1
EP1178880B1 EP00921249A EP00921249A EP1178880B1 EP 1178880 B1 EP1178880 B1 EP 1178880B1 EP 00921249 A EP00921249 A EP 00921249A EP 00921249 A EP00921249 A EP 00921249A EP 1178880 B1 EP1178880 B1 EP 1178880B1
Authority
EP
European Patent Office
Prior art keywords
concrete
protective fabric
fabric
protective
air
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.)
Revoked
Application number
EP00921249A
Other languages
German (de)
English (en)
Other versions
EP1178880A1 (fr
Inventor
Leif Asman
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.)
KB-PRODUKTER I NYBRO AB
Original Assignee
KB-PRODUKTER I NYBRO 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20414977&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1178880(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KB-PRODUKTER I NYBRO AB filed Critical KB-PRODUKTER I NYBRO AB
Priority to DK00921249T priority Critical patent/DK1178880T3/da
Publication of EP1178880A1 publication Critical patent/EP1178880A1/fr
Application granted granted Critical
Publication of EP1178880B1 publication Critical patent/EP1178880B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/40—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material
    • B28B7/44—Moulds; Cores; Mandrels characterised by means for modifying the properties of the moulding material for treating with gases or degassing, e.g. for de-aerating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • 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 an air-permeable protective fabric for casting concrete in a form, the form consisting of flat form boards having a front to be directed towards the concrete and a back to be directed away from the concrete, the protective fabric being intended to be arranged between the form and the concrete to permit air from the concrete to migrate through the fabric and further along the same out in the open air.
  • the form When casting concrete in a form, the form is made up of form boards which usually have standard dimensions but which can also be sawn out to other dimensions as desired. In the joint between neighbouring form boards, studs are usually arranged to hold the form boards together by means of nail joints or the like.
  • flowing concrete can be poured into the form.
  • a great problem in such casting of concrete in a form is the air which in the form of bubbles can remain in the solidifying concrete and make it porous, frequently with bubbles in the surface. According to prior art technique, this problem is obviated by means of an air-permeable protective fabric of the type defined above, which is cut out to the desired dimensions and which in most cases is fixed to the inside of the completed form.
  • the protective fabric also protects the form from any spilled concrete which is difficult to remove from the form board but which does not adhere to the protective fabric.
  • the object of the present invention is to provide a protective fabric of the type mentioned by way of introduction, which is foldable round and fixable to the back of a form board and is very durable and easy to remove, clean and reuse and which always gives a very smooth and tight concrete surface.
  • said protective fabric being a hygroscopic fibre cloth, which is made of fibres of a plastic material, such as polyester or polypropylene, which by hot rolling has been given a certain, limited degree of stiffness and pits in the side facing away from the concrete, the protective fabric having a thickness which is smaller than or equal to 1.5 mm, preferably smaller than or equal to 1.2 mm, and most advantageously a thickness in the range 0.8 - 1.2 mm, thereby being sufficiently pliable and flexible to be folded round the edges of the form board and be stretched to pliably and closely abut against the front, edges and back of the form board.
  • the invention is based on the knowledge that to achieve a smooth and tight concrete surface, from which the protective fabric comes off easily, it is most important that the concrete be watered during curing since, in case of deficiency of water, the surface layer becomes porous and brittle during curing. According to the invention, this is achieved by the hygroscopic cloth material and, in particular, the pits formed in this material in the initial phase of the curing storing excess water so as then to recirculate it to the surface layer of the concrete in the final phase of the curing.
  • the surface layer of the concrete will be extremely tight and hard
  • the protective fabric comes off very easily when stripping and the protective fabric will be very easy to clean since sufficient water has been supplied to all concrete particles so as to cure in the surface layer and not penetrate into and adhere to the protective fabric.
  • the pits are truncated, the truncated top of the cone facing the concrete.
  • the advantage of this type of pits is that they are very easy to manufacture by hot rolling using a roll which has pins projecting from its circumferential surface.
  • the protective fabric according to the invention can also be reinforced, for example, by inserting reinforcing wire. This may be advantageous when large wall surfaces are to be cast or in case of high outdoor temperatures.
  • the protective fabric according to the present invention is preferably fixed to the back of the form board, i.e. the side of the form board facing away from the concrete, with the aid of suitable fixing means, such as nails or tacks.
  • suitable fixing means such as nails or tacks.
  • Fig. 1 shows a form board 1 for a form (not shown) for casting of concrete 2.
  • the form board 1 consists of a flat board of, for example, plywood or steel.
  • the form board 1 has a front 3 to be directed towards the concrete 2 and an opposite side 5, below referred to as the back, to be directed away from the concrete 2.
  • an air-permeable protective fabric 4 which is made of a hygroscopic fibre cloth of a type that will be described in more detail, is arranged to abut against the large face of the front 3 of a form board before this is built into the desired form.
  • the fabric 4 has a larger surface area than the large face of the front 3 of the form board, so that edge portions 4a of the protective fabric 4 get outside the front 3, preferably so that such edge portions 4a form along the entire circumference of the front 3.
  • the edge portions 4a are folded round the edges of the form board 1, as shown in Fig. 1, while the edge portions 4a are stretched (in a conventional manner, not shown in detail) on the back of the form board, so that the fabric 4 is made to abut in a pliable and tight manner, against the front 3, edges and back 5 of the form board 1.
  • the fabric is fixed to the back 5 of the form board 1 in a manner which is conventional per se with the aid of schematically illustrated fixing means 6, such as tacks or nails, by using a stapler of the like.
  • the desired form can be built by conventional joining of the form boards.
  • the protective fabric 4 has a plurality of pits 7 in the form of truncated cones.
  • the truncated top 8 of the cone is adapted to be directed towards the solidifying concrete.
  • the protective fabric 4 functions as follows.
  • the concrete presses the protective fabric 4 more firmly against the form board 1 while at the same time air from the concrete leaks out through the protective fabric. Thanks to the pressure of the concrete against the protective fabric 4, the leaking air will be pressed further along the side of the protective fabric 4 facing away from the concrete, i.e. between the protective fabric 4 and the front 3 of the form board 1, so that the air thus migrates into the open air after having reached the end of the form. Simultaneously, the hygroscopic protective fabric and especially the pits 7 formed therein, in an initial curing phase, take up excess water which then in a final curing phase is recirculated to the surface layer of the concrete, which is thus watered.
  • the protective fabric 4 is made of a hygroscopic fibre cloth, which is made of fibres of a plastic material, such as polyester or polypropylene.
  • the protective fabric 4 is sufficiently soft, pliable and flexible to be folded round the edges of the form board 1.
  • the pliability thus increases by the protective fabric 4 being very thin, having a thickness of ⁇ 1.5 mm, preferably ⁇ 1.2 mm, and most advantageously a thickness in the range 0.8 - 1.2 mm.
  • the fabric has been given a certain, limited degree of stiffness by its two sides being hot rolled in a manner known per se.
  • pits 7 are suitably embossed close to each other in the side of the protective fabric 4 which is intended to face away from the concrete 2, said pits 7 having a depth which essentially corresponds to the thickness of the fabric and contributing to the fabric, in cooperation with the posteriorly situated form board 1, being capable of temporarily storing about 1.5 1 of water per square metre.
  • the pits 7 have an essentially truncated conical shape, the truncated top 8 facing the concrete 2.
  • the fabric material can, according to the invention, consist of, for example, non-woven material of propylene, for example a fabric material which is sold by the company Fiberweb under the trade name I 300 NOW Spund Bond.
  • the fabric can optionally be reinforced, for example by means of inserted reinforcing wire or the like.
  • the reinforcement can be, for example, fibre glass reinforcement, thereby preventing the fabric from stretching because of heat in the warm season.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Claims (4)

  1. Tissu protecteur perméable à l'air destiné au coulage de béton dans un coffrage, le coffrage consistant en planches de coffrage planes (1) possédant un devant (3) à orienter vers le béton (2) et un arrière (5) à orienter dans le sens opposé à celui du béton (2), le tissu protecteur (4) étant destiné à être placé entre le coffrage et le béton (2) afin de permettre à l'air venant du béton (2) de migrer à travers le tissu (4) et, plus loin, en allant le long de celui-ci, d'arriver à l'air libre, le tissu protecteur (4) étant en outre une étoffe de fibres hygroscopiques, qui est faite de fibres d'une matière plastique, par exemple le polyester ou le polypropylène, qui a reçu, par laminage à chaud, un certain degré, limité, de raideur, le tissu protecteur (4) ayant une épaisseur qui est inférieure ou égale à 1,5 mm, de préférence inférieure ou égale à 1,2 mm, et de manière plus avantageuse, une épaisseur comprise dans l'intervalle de 0,8 à 1,2 mm, de manière à être suffisamment flexible et souple pour être replié autour des bords (4a) de la planche (1) du coffrage et pour être étiré de façon à venir flexiblement et étroitement en contact contre le devant (3), les bords (4a) et l'arrière (5) de la planche de coffrage (1), caractérisé en ce que le tissu protecteur comporte des piqûres (7) faites dans le côté regardant à l'opposé du béton (2).
  2. Tissu protecteur selon la revendication 1, caractérisé en ce que les piqûres sont de forme tronconique, la partie supérieure tronquée du cône (8) regardant du côté du béton (2).
  3. Tissu protecteur selon la revendication 1 ou 2, caractérisé en ce qu'il est renforcé, par exemple par insertion d'un fil métallique de renforcement
  4. Tissu protecteur selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il est destiné à être fixé à l'arrière (5) de la planche de coffrage (1), à savoir le côté de la planche de coffrage (1) regardant du côté opposé au béton (2), à l'aide de moyens de fixation appropriés (6), par exemple des clous ou des pointes.
EP00921249A 1999-03-24 2000-03-24 Toile de protection destinee au coulage du beton dans un moule Revoked EP1178880B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00921249T DK1178880T3 (da) 1999-03-24 2000-03-24 Beskyttelsesklæde til stöbning af beton i en form

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9901065A SE9901065L (sv) 1999-03-24 1999-03-24 Förfarande vid betonggjutning i form samt skyddsduk för genomförande av förfarandet och formskiva försedd med en dylik skyddsduk
SE9901065 1999-03-24
PCT/SE2000/000578 WO2000056509A1 (fr) 1999-03-24 2000-03-24 Toile de protection destinee au coulage du beton dans un moule

Publications (2)

Publication Number Publication Date
EP1178880A1 EP1178880A1 (fr) 2002-02-13
EP1178880B1 true EP1178880B1 (fr) 2004-06-09

Family

ID=20414977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00921249A Revoked EP1178880B1 (fr) 1999-03-24 2000-03-24 Toile de protection destinee au coulage du beton dans un moule

Country Status (7)

Country Link
EP (1) EP1178880B1 (fr)
AT (1) ATE268677T1 (fr)
AU (1) AU4158600A (fr)
DE (1) DE60011423D1 (fr)
DK (1) DK1178880T3 (fr)
SE (1) SE9901065L (fr)
WO (1) WO2000056509A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009045088A1 (fr) * 2007-10-04 2009-04-09 Boon Ming Lee Garniture de coffrage à béton à perméabilité régulée
WO2011006195A1 (fr) * 2009-07-14 2011-01-20 William Alexander James Sadler Production et traitement de dalles
JP6320980B2 (ja) * 2015-10-14 2018-05-09 株式会社高洋商会 コンクリート用透水性型枠

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE377482B (fr) * 1973-09-24 1975-07-07 Cementa Ab
US4787597A (en) * 1985-05-28 1988-11-29 Kabushiki Kaisha Kumagaigumi Cloth faced form for forming concrete
GB2206633A (en) * 1987-06-12 1989-01-11 Sgb Group Plc A formwork panel
DK0429752T3 (da) * 1989-11-20 1993-06-07 Du Pont Forskalling til mønstret beton
US5206981A (en) * 1991-10-25 1993-05-04 E. I. Du Pont De Nemours And Company Fabric tensioning frame
DE19623584B4 (de) * 1996-06-13 2004-10-14 Johns Manville International, Inc., Denver Textiles Flächengebilde zur Verwendung als Betonformzwischenlage

Also Published As

Publication number Publication date
SE9901065L (sv) 2000-09-25
DK1178880T3 (da) 2004-10-18
WO2000056509A1 (fr) 2000-09-28
SE9901065D0 (sv) 1999-03-24
AU4158600A (en) 2000-10-09
ATE268677T1 (de) 2004-06-15
EP1178880A1 (fr) 2002-02-13
DE60011423D1 (de) 2004-07-15

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