EP0429730A1 - Matériau composite à fixer sur un panneau de coffrage - Google Patents

Matériau composite à fixer sur un panneau de coffrage Download PDF

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Publication number
EP0429730A1
EP0429730A1 EP89312545A EP89312545A EP0429730A1 EP 0429730 A1 EP0429730 A1 EP 0429730A1 EP 89312545 A EP89312545 A EP 89312545A EP 89312545 A EP89312545 A EP 89312545A EP 0429730 A1 EP0429730 A1 EP 0429730A1
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EP
European Patent Office
Prior art keywords
water
air
concrete
sheet
composite material
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.)
Granted
Application number
EP89312545A
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German (de)
English (en)
Other versions
EP0429730B1 (fr
Inventor
Fujio C/O K.K. Central Engineering Iwata
Wataru Tashiro
Takeshi Yamaguchi
Junichi Arakawa
Tokukazu Kitano
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.)
CENTRAL ENGINEERING KK
Dyflex Corp
Original Assignee
CENTRAL ENGINEERING KK
Dyflex Corp
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 CENTRAL ENGINEERING KK, Dyflex Corp filed Critical CENTRAL ENGINEERING KK
Priority to EP19890312545 priority Critical patent/EP0429730B1/fr
Priority to DE1989605481 priority patent/DE68905481T2/de
Publication of EP0429730A1 publication Critical patent/EP0429730A1/fr
Application granted granted Critical
Publication of EP0429730B1 publication Critical patent/EP0429730B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04G9/10—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 novel composite material for attachment to the inside surface of a concrete panel used at the time of concrete placement.
  • Concrete structures for construction and civil engineering work are made by framing wood or metal concrete panels, by pouring cement concrete into the frames comprising the panels and by allowing the cement concrete to cure and harden.
  • the water ratio is thus increased to improve the fluidity (to increase the slump) of the cement concrete so that the cement concrete can be poured by pumping and pipe feeding.
  • raw concrete having a slump value of 8 cm or less is used. This concrete has less fluidity and is easy to entrain bubbles, generating pits and pinholes, and reduces the strength of the concrete at cold joints.
  • the above-mentioned fabric or mat is made of tangled fibers and yarns and thus includes numerous micropores.
  • the cement paste of the placed concrete enters the micropores and cures and hardens.
  • the anchor effect of the hardened cement paste hinders the panel from being released.
  • the fabric or mat remains on the concrete structure side or is torn, or the surface of the concrete structure becomes rough.
  • the yarns of the fabric are frayed at the cut-off ends of the fabric and tangle to the placed concrete, reducing the releasability of the panel and impairing the appearance of the concrete.
  • the fabric has peculiar drapability, they are apt to wrinkle and slack when they are secured to the panel with stitches. If raw concrete is placed, such wrinkled and slack portions are buried in the concrete, making it very difficult to release the panel from the concrete and greatly impairing the appearance of the concrete. When separation holes are drilled in wood panels, wood chips enter the clearances between the panel and the fabric. To solve these problems, adhesive application to the entire surface of the panel is desirable.
  • the present invention provides a novel composite material for attachment to a concrete panel, which can be attached to a concrete panel extremely easily and securely and offers superior releasability and water/air permeability after concrete placement.
  • Fig. 1 is a perspective view of a first embodiment of the present invention
  • Fig. 2 is an enlarged sectional view taken on line II-II in Fig. 1
  • Fig. 3 is a view similar to Fig. 2 illustrating a second embodiment of the present invention
  • Figs. 4 (a) and 4 (b) are a fragmentarily enlarged perspective view and a sectional view of a monofilament fabric used for the composite material of the present invention
  • Figs. 5 (a) and 4 (b) are a fragmentarily enlarged perspective view and a sectional view of a composite monofilament fabric used for the composite material of the present invention
  • Figs. 6 (a), 6 (b) and 6 (c) shows various application forms of adhesive application layers
  • Fig. 7 is a vertical sectional front view of a panel frame, illustrating a concrete placement method using the composite material of the present invention.
  • the present invention provides a composite material A for attachment to a concrete panel.
  • the material comprises a water/air-permeable sheet 1 being adapted such that a woven or nonwoven fabric made of synthetic resin is smoothened at least on the surface thereof by heating treatment and having a water permeability value of 0.5 to 50 l/m2/min and an air permeability value of 0.1 to 20 ml/cm2/sec, an adhesive layer 2 attached to the back surface of the sheet 1, and a releasing sheet 3 removably attached to the adhesive layer 2, wherein after the releasing sheet 3 is removed, the water/air-­permeable sheet 1 is attached to the concrete placement side of the concrete panel using the adhesive layer 2.
  • the water/air-permeable sheet 1 must have a water permeability value of 0.5 to 50 l/m2/min and an air permeability value of 0.1 to 20 ml/cm2/sec. If the water permeability value is less than 0.5 l/m2/min and the air permeability value is less than 0.1 ml/cm2/sec, water and air are not discharged sufficiently after concrete placement. If the water permeability value is more than 50 l/m2/min and the air permeability value is more than 20 ml/cm2/sec, micropores which pass through the inside from the surface increase in size and quantity. This allows cement paste of placed concrete to enter the micropores and deteriorates the releasability of the panel.
  • the water/air-permeable sheet 1 of embodiment (i) comprises a basic layer 11 formed in a sheet by numerous synthetic resin fibers being closely entangled with each other, and a smooth surface layer 12 formed by the synthetic resin fibers being fused to join to each other as shown in Fig. 3.
  • the surface layer 12 is formed by heating and fusing the surface of the basic layer 11. It is desirable to form the surface layer 12 on both sides of the basic layer 11, but the surface layer 12 formed only on one side of the basic layer 11 is included in the present invention. When the surface layer 12 is formed on one side, a releasing sheet 3 is attached to the non-heated surface using an adhesive layer 2.
  • the synthetic resin fibers of the nonwoven fabric comprise one or several kinds of synthetic fiber filament materials selected from among nylon, polyester, acrylic, polypropylene, acetate, etc.
  • the thickness of the synthetic resin fiber is determined to 0.5 to 20 deniers. If the thickness is less than 0.5 deniers, the voids inside the fabric becomes too small, reducing water/air permeability. If the thickness is more than 20 deniers, the voids becomes too large and cement paste is apt to easily enter the voids.
  • the number of needle punching treatments is determined to 200 times/cm2 or more. If the number is less than 200, the density of the nonwoven fabric decreases and the surface of the fabric becomes rough.
  • the heating temperature is determined to 80 to 180 o C. If the temperature is less than 80 o C, fusing is insufficient and fibers are apt to become easily fluffy. If the temperature is more than 180 o C, excessive fusing occurs and it is difficult to form water/air permeable pores.
  • the water/air-permeable sheet 1 of embodiment (ii) comprises a plain, twill or satin fabric of monofilaments of 80 to 400 deniers, made of polyester, acrylic, nylon, polyethylene, polypropylene, saran, teflon, etc.
  • the fabric is then subjected to pressing and heating treatment to press flat and fuse the monofilaments 13 as shown in Figs. 4 (a) and 4 (b).
  • the pressing and heating treatment is conducted for about five minutes at 90 to 250 o C (a temperature below the melting point of the monofilament) using heat calender rolls.
  • the core member 14a (of synthetic resin having a high melting point) of the composite monofilament 14 used for the water/air-permeable sheet 1 of embodiment (iii) is mainly composed of polypropylene resin.
  • the sheath member 14b (synthetic resin having a low melting point) is made of a polyolefin-based resin (mainly polyethylene resin).
  • the core member 14a is covered with the sheath member 14b. Heating treatment is conducted using heat calender rolls in the same way as described above at a temperature (110 to 120 o C) close to the melting point of the sheath member 14b. By this heating treatment, the sheath members 14b are fused to join to each other at the intersections of the composite filaments 14 as shown in Figs. 5 (a) and 5 (b).
  • the water/air-permeable sheet 1 of embodiment (iv) is obtained by heating a fabric woven using multifilaments comprising a plurality of twisted synthetic resin fibers. By the heating treatment, most constructive filaments are fused to join to each other and the multifilaments are fused to join to each other at the intersections thereof.
  • the above-mentioned water/air-permeable sheets 1 are common in that at least one side of the woven or nonwoven fabric is heated and smoothened.
  • the water/air permeability values must remain in the above-mentioned specific ranges.
  • Acrylic-based adhesive or rubber-based adhesive (natural rubber, reclaimed rubber, chloroprene, polyisoprene, styrene butadiene, polyisobutylene, etc.) is desirably used for the adhesive layer 2.
  • the adhesive layer 2 is formed in vertical stripes, circular spots or oval spots as shown in Figs. 6 (a), 6 (b) or 6 (c) respectively.
  • the adhesive non-application portions 22 located between adhesive application portions 21 should be continuous at least in the vertical direction of the water/air-permeable sheet 1. If the adhesive layer is formed on the entire surface, the layer prevents the water and air included in placed concrete from moving, reducing the water/air permeability.
  • the adhesive application layers shown in the figures water and air can pass through the water/air-permeable sheet 1 and can be smoothly discharged from the adhesive non-application portions 22. It is needless to say that the forms of the adhesive application portions and the adhesive non-application portions are not limited to those shown in the figures but other forms can also be used. Kraft paper, pulp paper or various sheets to which a releasing agent has been applied can be used as the releasing sheet 3 which is attached to the water/air-permeable sheet 1 using the adhesive layer 2.
  • the composite material A of the present invention is attached to the inner surface of the concrete panel P using the adhesive layer 2. Since the water/air-permeable sheet 1 has the adhesive layer 2 on its back surface, it is not necessary to roll and secure the top, bottom, right and left ends of the sheet on the panel. The sheet can be attached to even a large panel made by joining a plurality of 900 x 1800 mm panels without joint marks.
  • the drapability of the sheet is canceled by the form holding function of the adhesive layer 2. Uniform attachment is ensured simply by gently stroking the surface by hand. No wrinkle or slack is caused.
  • the water/air-permeable sheet 1 is made of woven or nonwoven fabric which has specific water/air permeability values as described above, cement paste is filtered effectively. Water and bubbles quickly pass through the micropores of the sheet 1 and move in the areal direction. They are then discharged.
  • the concrete body C After a while, the concrete body C cures and hardens and the surface becomes dense. Contraction or crack generation due to drying of surplus water do not occur. Rust generation on reinforcing rods due to permeation of carbon dioxide is prevented. In addition, pinholes and voids due to residual bubbles are not caused.
  • the concrete structure is as a whole extremely sturdy (20 to 50% higher in compression strength than a conventional concrete body). If the surface is lower in density and higher in contraction rate than the inside of the concrete body, cracks are apt to occur. Since the concrete body C obtained by the present invention is dense as a whole, crack generation is reduced significantly. The cold joints due to bleeding of cement paste at the time of concrete placement are reduced significantly and almost undetectable visually. Since the surplus water and air are discharged quickly after concrete placement as described above, the surplus water and air flow spontaneously from the inside of the concrete body C and are delivered smoothly. This prevents dryout phenomenon of cement.
  • the surface of the sheet 1 is made smooth by fusing, the surface is free from minute unevenness and fluff due to fibers.
  • the micropores are closed to the extent that the specified water/air permeability values are maintained, the actual contact area to the placed concrete is small, preventing the entry of fine fibers into the concrete and also preventing cement paste from entering the sheet 1. Therefore, the releasability of the sheet 1 is extremely superior after the concrete cures and hardens.
  • the concrete surface obtained after releasing the sheet 1 has a glossy appearance and can be used as a finished surface without requiring finish work.
  • the color of the surface concrete layer is the same as that (deep gray) of the inner concrete layer. No chalking is noticed. Accordingly, the entire structure is uniform in quality. This feature is obtained since the internal surplus water and air are discharged at a proper speed from the sheet 1 when the concrete body C cures and hardens. The phenomenon of maldistribution and hardening of alkali (effolorescence phenomenon) does not occur on the surface of the concrete body C.
  • the nonwoven sheet of embodiment (i) is used as the water/air-permeable sheet 1
  • fibers are not frayed at their ends since the fibers are densely entangled because the synthetic resin fiber webs are formed into a sheet by needle punching treatment, and the adhesive layer 2 is attached to the back surface of the sheet 1.
  • the surface is formed into a film including numerous micropores by heating and fusing treatment, entry of cement paste is prevented while the specified water/air permeability values are maintained.
  • the releasability of the panels is extremely superior after the concrete cures and hardens.
  • the monofilaments 13 are pressed flat and fused at the intersections.
  • the clearance between the monofilaments 13 is scarce, preventing entry of cement paste and further improving the releasability of the sheet from the concrete after the concrete cures and hardens.
  • the composite monofilaments 14 are fused to join to each other.
  • the clearance between the composite monofilaments are eliminated at the intersections. Entry of cement paste is further prevented, ensuring superior releasability.
  • the fusing of the composite monofilaments 14 improves the form holding characteristic of the sheet.
  • multifilament yarns are fused to join to each other and most filaments are also fused to join to each other, preventing fluffing of fibers.
  • this embodiment is superior in releasability.
  • the composite material A of the present invention is attached to the concrete panel P, it is also possible to hold the panel on the sheet 1 side using metal battens (not shown).
  • the concave/convex patterns formed by the battens generate after the frame panels are released.
  • the patterns provide beautiful appearances different from conventional ones.
  • Polypropylene fiber web (15 cm thick) comprising 100% two-denier fibers was placed on the top and bottom surfaces of a base fabric, 250 g of web for each surface. This lamination was needle punched 600 times/cm2 to form a 1.2 cm thick nonwoven fabric having a sheet form. After needle punching, the base fabric had not its original shape. Both sides of the nonwoven fabric were heated and fused using heat calender rolls at 160 to 170 o C to obtain a water/air-permeable sheet 1 having surface films 12 including a plurality of micropores on both sides. The water and air permeability values of the sheet 1 were 5 l/m2/min and 0.8 to 1 ml/cm2/sec respectively.
  • solvent-type chloroprene adhesive was applied in vertical stripes to form an adhesive layer 2.
  • Kraft paper (releasing sheet) 3 with a releasing agent applied was attached to the adhesive layer 2 to obtain the composite material A shown in Fig. 3.
  • the water/air-permeable sheet 1 was attached to one side of a plywood panel P (90 x 180 cm) for general frame use using the adhesive layer 2. Uniform attachment was ensured to the entire surface of the panel P simply by gently stroking the surface by hand. No wrinkle or slack was caused.
  • a plurality of the panels P were formed into a frame F having an open width of 15 cm with the water/air-permeable sheets 1 attached inside the frame F. At the lower sections of the frame F, apertures 4 measuring 5 to 10 mm in diameter were provided.
  • a long sheet of the composite material of this embodiment, which has been rolled, is brought to a construction site and cut to proper dimensions before use. Therefore, the embodiment is superior in transportability and handling.
  • Two-hundred-denier polypropylene monofilaments were plain woven (0.32 mm thick, 145 pieces/inch x 46 pieces/inch) and subjected to pressing and heating treatment at 160 to 165 o C using heat calender rolls to obtain the water/air-permeable sheets 1 of this embodiment.
  • the water and air permeability values of the sheet 1 were 15 l/m2/min and 5 ml/cm2/sec respectively.
  • solvent-type chloroprene adhesive was applied in vertical stripes to form an adhesive layer 2.
  • Kraft paper (releasing sheet) 3 with a releasing agent applied was attached to the adhesive layer 2 to obtain the composite material A shown in Figs. 1 and 2.
  • the water/air-permeable sheet 1 was attached to one side of a plywood panel P (90 x 180 cm) for general frame use using the adhesive layer 2. Like the embodiment 1, uniform attachment was ensured to the entire surface of the panel P simply by gently stroking the surface by hand. No wrinkle or slack was caused.
  • Two panels P with the water/air-permeable sheets 1 attached and two panels P without the water/air-permeable sheet 1 were formed into a square column frame F with a cross-sectional area of 90 x 90 cm and a height of 1800 cm. In this case, the two panels with the water/air-permeable sheets 1 were provided adjacent to each other with the water/air-­permeable sheets 1 attached inside the panels. The two panels without the water/air-permeable sheet 1 were also provided adjacent to each other. At the lower sections of the frame F, water discharge apertures 4 were provided.
  • the panels P with the water/air-permeable sheets 1 can be released extremely easily.
  • the surfaces of the water/air-permeable sheets 1 were almost free from cement. It was thus possible to reuse the panels.
  • the surface of the concrete body C was deep gray and extremely glossy and almost free from pinholes and honeycombs. On the other hand, it took time and labor when releasing the panels P without the water/air-­permeable sheet 1. Much cement was attached to the panels P. Chalking was noticed on the surface of the concrete body C and numerous pinholes and honeycombs were found.
  • Resiliency was measured at nine positions on the surfaces of the concrete body C using Schmidt hammer testing method (25 points at each position).
  • the average surface strength value on the sides to which the panels with the water/air-permeable sheets 1 of the composite material of the present invention were attached was 421 kgf/cm2.
  • the average surface strength value on the sides to which the panels without the water/air-permeable sheet 1 were attached was 368 kgf/cm2. This means that the former is 14% higher than the latter in the surface strength.
  • Two-hundred-denier monofilaments comprising polypropylene core members covered with sheath members made of polyolefin resin were plain woven (0.38 mm thick, 145 pieces/inch x 20 pieces/inch) and subjected to pressing and heating treatment at 130 o C using heat calender rolls to obtain the water/air-permeable sheet 1 of this embodiment.
  • the water and air permeability values of the sheet 1 were 10 l/m2/min and 5 ml/cm2/sec respectively.
  • solvent-type chloroprene adhesive was applied in vertical stripes to form an adhesive layer 2.
  • Kraft paper (releasing sheet) 3 with a releasing agent applied was attached to the adhesive layer 2 to obtain the composite material A shown in Figs. 1 and 2.
  • a frame F was formed using panels with the water/air-permeable sheets 1 made of the above-mentioned composite material A. Concrete was placed into the frame F. After the concrete cured and hardened, the releasability of the frame F and the appearance of the surface of the concrete body C were checked. The releasability and appearance were almost the same as those obtained in the case of the embodiment 2. The resiliency of the surfaces of the concrete body C was measured according to the above-mentioned method. The result was also the same as that obtained in the case of the embodiment 2.
  • Polyester multifilaments were plain woven (weight 410 g/m2) and subjected to pressing and heating treatment at 150 o C to obtain the water/air-permeable sheet 1 of this embodiment.
  • the water and air permeability values of the sheet 1 were 18 l/m2/min and 10 ml/cm2/sec respectively.
  • a frame F was formed using panels with the water/air-permeable sheets 1 made of the above-mentioned composite material A. Concrete was placed into the frame F. After the concrete cured and hardened, the releasability of the frame F and the appearance of the surface of the concrete body C were checked. The releasability and appearance were almost the same as those obtained in the case of the embodiment 2. The resiliency of the surfaces of the concrete body C was measured according to the above-mentioned method. The result was also the same as that obtained in the case of the embodiment 2. In the case of the embodiments 2 to 4, like the embodiment 1, a long sheet of the composite material, which has been rolled, is brought to a construction site and cut to proper dimensions before use.
  • the embodiments are superior in transportability and handling.
  • the water/air-permeable sheets 1 of the embodiments 2 and 3 produce superior results in all cases of flat, twill and satin fabrics.
  • the fabrics differ in their characteristics.
  • the flat fabric is high in cement paste collecting (filtering) performance but is apt to cause clogging.
  • the twill fabric is medium in cement paste collecting and unclogging performance.
  • the satin fabric is low in cement paste collecting performance but high in releasability. Therefore, it is desirable to selectively use them depending on the application.

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  • 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)
  • Laminated Bodies (AREA)
EP19890312545 1989-12-01 1989-12-01 Matériau composite à fixer sur un panneau de coffrage Expired - Lifetime EP0429730B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19890312545 EP0429730B1 (fr) 1989-12-01 1989-12-01 Matériau composite à fixer sur un panneau de coffrage
DE1989605481 DE68905481T2 (de) 1989-12-01 1989-12-01 Zusammengesetztes material zum anbringen an schalungspaneelen.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19890312545 EP0429730B1 (fr) 1989-12-01 1989-12-01 Matériau composite à fixer sur un panneau de coffrage

Publications (2)

Publication Number Publication Date
EP0429730A1 true EP0429730A1 (fr) 1991-06-05
EP0429730B1 EP0429730B1 (fr) 1993-03-17

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EP19890312545 Expired - Lifetime EP0429730B1 (fr) 1989-12-01 1989-12-01 Matériau composite à fixer sur un panneau de coffrage

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EP (1) EP0429730B1 (fr)
DE (1) DE68905481T2 (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010346A3 (fr) * 1990-12-11 1992-07-23 Du Pont Tissu ameliore utilise comme revetement pour coffrage a beton
US5247730A (en) * 1991-10-25 1993-09-28 E. I. Du Pont De Nemours And Company Method for attaching and bidirectionally tensioning a porous fabric over a form support
US5302099A (en) * 1992-09-28 1994-04-12 E. I. Du Pont De Nemours And Company Laminated fabric useful as a concrete form liner
WO1998013179A1 (fr) * 1996-09-27 1998-04-02 E.I. Du Pont De Nemours And Company Revetement pour coffrage a beton
EP0978604A1 (fr) * 1998-08-03 2000-02-09 Fibertex A/S Coffrage pour béton et méthode d'obtention d'un coffrage pour béton
WO2000054948A1 (fr) * 1999-03-12 2000-09-21 Polyfelt Gesellschaft M.B.H. Coffrage a beton
WO2010127657A3 (fr) * 2009-05-04 2011-03-10 Max Frank Gmbh & Co. Kg Matériel auxiliaire de coffrage à utiliser sur un coffrage béton, élément de coffrage et coffrage béton
JP2015200072A (ja) * 2014-04-04 2015-11-12 清水建設株式会社 養生型枠用シートおよびこのシートを用いた養生型枠
JP2015218451A (ja) * 2014-05-14 2015-12-07 株式会社大林組 コンクリートの養生方法
JP2016196730A (ja) * 2015-04-02 2016-11-24 スリーエム イノベイティブ プロパティズ カンパニー コンクリート構造物の製造方法、コンクリートの中性化抑制方法、及び粘着シート
JP2017075468A (ja) * 2015-10-14 2017-04-20 株式会社高洋商会 コンクリート用透水性型枠
JP2017166290A (ja) * 2016-03-18 2017-09-21 国立大学法人 東京大学 コンクリート部材の施工方法およびコンクリート養生型枠
JP2017222984A (ja) * 2016-06-13 2017-12-21 鹿島建設株式会社 コンクリート構造物の製造方法、及び当該コンクリート構造物の製造方法に用いられる硬質シート
JP2022060937A (ja) * 2020-10-05 2022-04-15 バルチップ株式会社 目粗しシート、これを用いた型枠用パネル、及びこの型枠用パネルを用いたコンクリート躯体の製造方法
JP7779412B1 (ja) * 2024-08-30 2025-12-03 大日本印刷株式会社 透水性シート、板部材、型枠およびコンクリート製品の製造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2310400A (en) * 1940-01-18 1943-02-09 Us Rubber Co Form liner
GB2175635A (en) * 1985-05-28 1986-12-03 Kumagai Gumi Co Ltd Formwork
EP0315323A1 (fr) * 1987-11-06 1989-05-10 Kabushiki Kaisha Kumagaigumi Coffrage

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2310400A (en) * 1940-01-18 1943-02-09 Us Rubber Co Form liner
GB2175635A (en) * 1985-05-28 1986-12-03 Kumagai Gumi Co Ltd Formwork
EP0315323A1 (fr) * 1987-11-06 1989-05-10 Kabushiki Kaisha Kumagaigumi Coffrage

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992010346A3 (fr) * 1990-12-11 1992-07-23 Du Pont Tissu ameliore utilise comme revetement pour coffrage a beton
US5247730A (en) * 1991-10-25 1993-09-28 E. I. Du Pont De Nemours And Company Method for attaching and bidirectionally tensioning a porous fabric over a form support
US5302099A (en) * 1992-09-28 1994-04-12 E. I. Du Pont De Nemours And Company Laminated fabric useful as a concrete form liner
WO1998013179A1 (fr) * 1996-09-27 1998-04-02 E.I. Du Pont De Nemours And Company Revetement pour coffrage a beton
US5824347A (en) * 1996-09-27 1998-10-20 E. I. Du Pont De Nemours And Company Concrete form liner
EP0978604A1 (fr) * 1998-08-03 2000-02-09 Fibertex A/S Coffrage pour béton et méthode d'obtention d'un coffrage pour béton
WO2000054948A1 (fr) * 1999-03-12 2000-09-21 Polyfelt Gesellschaft M.B.H. Coffrage a beton
WO2010127657A3 (fr) * 2009-05-04 2011-03-10 Max Frank Gmbh & Co. Kg Matériel auxiliaire de coffrage à utiliser sur un coffrage béton, élément de coffrage et coffrage béton
JP2015200072A (ja) * 2014-04-04 2015-11-12 清水建設株式会社 養生型枠用シートおよびこのシートを用いた養生型枠
JP2015218451A (ja) * 2014-05-14 2015-12-07 株式会社大林組 コンクリートの養生方法
JP2016196730A (ja) * 2015-04-02 2016-11-24 スリーエム イノベイティブ プロパティズ カンパニー コンクリート構造物の製造方法、コンクリートの中性化抑制方法、及び粘着シート
JP2017075468A (ja) * 2015-10-14 2017-04-20 株式会社高洋商会 コンクリート用透水性型枠
JP2017166290A (ja) * 2016-03-18 2017-09-21 国立大学法人 東京大学 コンクリート部材の施工方法およびコンクリート養生型枠
JP2017222984A (ja) * 2016-06-13 2017-12-21 鹿島建設株式会社 コンクリート構造物の製造方法、及び当該コンクリート構造物の製造方法に用いられる硬質シート
JP2022060937A (ja) * 2020-10-05 2022-04-15 バルチップ株式会社 目粗しシート、これを用いた型枠用パネル、及びこの型枠用パネルを用いたコンクリート躯体の製造方法
JP7779412B1 (ja) * 2024-08-30 2025-12-03 大日本印刷株式会社 透水性シート、板部材、型枠およびコンクリート製品の製造方法

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DE68905481D1 (de) 1993-04-22
DE68905481T2 (de) 1993-06-24

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