EP0940525A1 - Betonschalungstafel - Google Patents

Betonschalungstafel Download PDF

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Publication number
EP0940525A1
EP0940525A1 EP98943080A EP98943080A EP0940525A1 EP 0940525 A1 EP0940525 A1 EP 0940525A1 EP 98943080 A EP98943080 A EP 98943080A EP 98943080 A EP98943080 A EP 98943080A EP 0940525 A1 EP0940525 A1 EP 0940525A1
Authority
EP
European Patent Office
Prior art keywords
synthetic resin
resin material
core plate
concrete form
board
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Withdrawn
Application number
EP98943080A
Other languages
English (en)
French (fr)
Other versions
EP0940525A4 (de
Inventor
Yasuko Fujita Corporation KUMANO
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.)
Fujita Corp
Original Assignee
Fujita 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 Fujita Corp filed Critical Fujita Corp
Publication of EP0940525A1 publication Critical patent/EP0940525A1/de
Publication of EP0940525A4 publication Critical patent/EP0940525A4/de
Withdrawn legal-status Critical Current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
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics

Definitions

  • the present invention relates to a board for a concrete form panel usable for building construction and civil engineering works. More particularly, the present invention relates to such a board for a concrete form panel, which is capable of providing good recyclability, high strength, good hold of nails hammered therein together with easiness in removing nails therefrom, as well as good workability.
  • a board for a concrete form panel comprising a core layer formed of an urethane-resin foam and a pair of skin layers provided on and covering the both side surfaces of the core layer, wherein the she layers are formed of a polypropylene material embedded with glass fibers.
  • Published Japanese Patent Application No. Hei-8-100523 discloses a board for a concrete form panel, the board being formed of a synthetic resin foam, such as a styrene resin foam, wherein the board comprises an inner core layer formed of that synthetic resin foam highly expanded, and a Pair of skin layers formed of that synthetic resin foam less expanded and with glass fibers embedded therein.
  • the inventors of the present invention has approached to the above-mentioned problems to find the solution.
  • a board for a concrete form panel comprising: a core plate formed of a first synthetic resin material and having both side surfaces; and a pair of skin layers formed of a second synthetic resin material and provided on and covering the both side surfaces of the core plate.
  • the first synthetic resin material for the core plate is cellular such that the core plate provides hold of nails hammered therein.
  • the skin layers have water-impermeability and strippability from a surface of formed concrete.
  • the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers have substantially the same composition.
  • the first synthetic resin material for the core plate may preferably have an elastic modulus in flexure greater than 5,000 kgf/cm 2 (about 490 megapascals).
  • the first synthetic resin material for the core plate may preferably comprise a foamed synthetic resin material expanded with an expansion ratio lower than 400%.
  • the second synthetic resin material for the skin layers may preferably comprise a non-foamed synthetic resin material.
  • the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers may comprise a copolymer of a rubber-like resin monomer and a non-rubber-like resin monomer.
  • the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers may comprise an alloy of a rubber-like resin and a non-rubber-like resin.
  • the rubber-like resin may be selected from the group consisting of butadiene rubber, butylene rubber, isoprene rubber and chloroprene rubber.
  • the non-rubber-like resin may comprise a styrene resin.
  • the core plate may consist essentially of said first synthetic resin material.
  • the skin layer may consist essentially of said second synthetic resin material.
  • the skin layer may have an outer surface with a relief pattern formed therein.
  • the ratio in thickness of the core plate to the skin layer may fall in the range from 20:1 to 4:1.
  • a board for a concrete form panel in accordance with the present invention comprises a core plate formed of a first synthetic resin material and having both side surfaces.
  • the board further comprises a pair of skin layers formed of a second synthetic resin material and provided on and covering the both side surfaces of the core plate.
  • the first synthetic resin material for the core plate may preferably have an elastic medulus in flexure greater than 5,000 kgf/cm 2 (about 490 megapascals), which can provide sufficient strength for use as a board for a concrete form panel.
  • the first synthetic resin material may be preferably flexible and cellular such that the core plate provides good hold of nails hammered in the core plate.
  • the first synthetic resin material may preferably comprise a thermoplastic synthetic resin material in order to provide good recyclability of the board
  • cellular synthetic resin materials suitable for the core plate is a foamed synthetic resin material.
  • the formed synthetic resin material may be preferably expanded with a relatively low expansion ratio lower than 400%, and more preferably lower than 300%, in order to provide the board with high rigidity, high impact, high strength and good bold of nails hammered therein.
  • the foamed synthetic resin material may be preferably a closed-cell foam, which generally have higher strength than an open-cell foam.
  • the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers may contain a rubber-like resin so as to provide the board with flexibility
  • the first and second synthetic resin materials may comprise a copolymer of a rubber-like resin monomer and a non-rubber-like resin monomer.
  • they may comprise an alloy of a rubber-like resin and a non-rubber-like resin.
  • Suitable rubber-like resins include, but are not limited to, butadiene rubber, butylene rubber, isoprene rubber and chloroprene rubber.
  • a synthetic resin material containing a rubber-like resin is highly preferable for the present invention because the concrete form panel using the board formed of such a material would provide high strength and good bold of nails hammered therein together with easiness in removing nails therefrom.
  • the amount of such a rubber-like resin in the total of the synthetic resin material may be preferably about 5% to about 30% by weight.
  • the pair of skin layers formed of the second synthetic resin material and provided on and covering the both side surfaces of the core plate serve to reinforce the core plate and improve the rigidity of the board.
  • the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers have substantially the same composition.
  • the skin layers have water-impermeability and strippability from a surface of formed concrete. While the second synthetic resin material for the skin layers may be a foamed resin material or may be a non-foamed resin material, it may be preferably a non-foamed resin material in order to provide the board with higher rigidity.
  • the outer surface of the skin layer which will be in contact with the surface of the concrete filled in the cavity defined by the concrete form panels, may preferably have a relief pattern formed therein.
  • the relief pattern may be an ornamental pattern, such as a woodgrain pattern and a lattice pattern, which is transferred onto the surface of the formed concrete.
  • the relief pattern may also serve to improve adhesion of mortar to the surface of the formed concrete if the surface is to be covered by finish mortar or if tiles are furnished onto the surface through a mortar layer formed between the tiles and the surface of the formed concrete.
  • the relief pattern may be formed through a known technique, such as embossing. The difference in height between higher and lower portions of the relief pattern may be preferably a few millimeters or less.
  • the skin layers may preferably comprise a highly crosslinked polymer material in order to improve durability against deterioration factors including abrasion, exposure to the ultraviolet radiation and others.
  • a board for a concrete form panel comprises a core plate formed of a first synthetic resin material and having both side surfaces; and a pair of skin layers formed of a second synthetic resin material and provided on and covering the both side surfaces of the core plate, wherein the first synthetic resin material for the core plate and the second synthetic resin material for the skin layers have substantially the same composition.
  • the core plate may consist essentially of the first synthetic resin material and the skin layers may consist essentially of the second synthetic resin material, so that the core plate and the skin layers do not need any glass fibers to be embedded therein.
  • a board for a concrete form panel in accordance with the present invention provides improved recyclability.
  • the skin layer has a thickness smaller than the core plate.
  • the ratio in thickness of the core plate to the skin layer may be preferably 20:1 to 4:1. With the thickness ratio falling in this range, the elastic modulus in flexure of the board itself greater than 18,000 kgf/cm 2 (about 1,760 megapascals) may be achieved where the elastic modulus in flexure of the first synthetic resin material for the core plate is greater than 5,000 kgf/cm 2 (about 490 megapascals). This provides the board with a sufficient strength for eliminating glass fibers embedded therein.
  • Figs. 1 and 2 show a board 1 for a concrete form panel 4 according to an embodiment of the present invention.
  • the board 1 comprises a core plate 2 formed of a first synthetic resin material and having both side surfaces, and a pair of skin layers 3 formed of a second synthetic resin material and provided on and covering the both side surfaces of the core plate 2.
  • the board 1 is rectangular in shape. Wooden stiffeners 5 are provided along the peripheral edges and the longitudinal center line of the board 1 and secured to the board 1 by means of nails 6 hammered therein, so as to form the concrete form panel 4.
  • Suitable nails for securing the stiffeners 5 to the board 1 include those having a shank with a diameter of two to five millimeters.
  • the board 1 provides good hold of nails hammered therein, so that it hardly allow the nails to loosen even six months after they are hammered in the board 1.
  • the exemplified board was fabricated to comprise a core plate having both side surfaces and a pair of skin layers provided on and covering the both side surfaces of the core plate, as described above.
  • the core plate was formed of a first synthetic resin material and the skin layers were formed of a second synthetic resin material.
  • Either of the first and second synthetic resin materials comprised a thermoplastic styrene resin material, which was a copolymer comprising about 86% by weight of a styrene resin monomer (non-rubber-like resin monomer) and about 14% by weight of a butylene rubber monomer (rubber-like resin monomer).
  • the core plate was rectangular in shape and has a thickness of 8 millimeters, a width of 600 millimeters and a length of 1800 millimeters.
  • the skin layer was made from a sheet of the above-mentioned styrene resin material having a thickness of 2 millimeters and was applied and attached onto a respective side surface of the core plate by means of adhesive.
  • the core plate was formed of the above-mentioned styrene resin material foamed and expanded with an expansion ration of about 300%.
  • the sheets for the skin layers were formed of the above-mentioned styrene resin unexpanded or non-foamed.
  • the board thus fabricated was tested to show an elastic modulus in flexure of about 18,000 kgf/cm 2 (about 1,760 megapascals), which can provide a sufficient rigidity for a board used for fabricating a concrete form panel.
  • Concrete form panels as shown in Figs. 1 and 2 were fabricated using such boards and assembled to define a cavity for a concrete wall, an amount of concrete was filled in the cavity, and the concrete panels were removed after the concrete was hardened
  • the concrete wall thus constructed was found to have both appearance and characteristics as excellent as those of a concrete wall which may be constructed using typical concrete form panels comprising a plywood board.
  • the concrete form panels fabricated using the boards of the present invention were retained in the assembled state during about six months. It was found that the concrete form panels provided good hold of the nails hammered in the boards of panels, so that rehammering of the nails was unnecessary during that six-month period.
  • the concrete form panels were reused twelve times and then inspected to show adhesion of little concrete on the surfaces of the boards of the panels. The nails were removed from the boards as easily as from a typical plywood board for a concrete form panel.
  • the present invention provides a board for a concrete form panel, which is capable of providing good recyclability, high strength, good hold of nails hammered therein together with easiness in removing nails therefrom, as well as good workability.

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)
  • Laminated Bodies (AREA)
EP98943080A 1997-09-25 1998-09-22 Betonschalungstafel Withdrawn EP0940525A4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP27966697 1997-09-25
JP27966697A JP3884142B2 (ja) 1997-09-25 1997-09-25 コンクリート型枠用板材
PCT/JP1998/004254 WO1999015743A1 (fr) 1997-09-25 1998-09-22 Panneau de coffrage a beton

Publications (2)

Publication Number Publication Date
EP0940525A1 true EP0940525A1 (de) 1999-09-08
EP0940525A4 EP0940525A4 (de) 2000-12-13

Family

ID=17614179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98943080A Withdrawn EP0940525A4 (de) 1997-09-25 1998-09-22 Betonschalungstafel

Country Status (5)

Country Link
EP (1) EP0940525A4 (de)
JP (1) JP3884142B2 (de)
KR (1) KR20000069026A (de)
CN (1) CN1241236A (de)
WO (1) WO1999015743A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004070139A1 (es) * 2003-02-04 2004-08-19 Sanchez Renasco Jesus Pieza de encofrado para obtencion de cornisas y similares

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100445450B1 (ko) * 2001-09-14 2004-08-21 한국과학기술원 내충격성이 우수한 복합재료 판재 및 이를 이용한복합재료 거푸집
JP2005307732A (ja) * 2004-03-26 2005-11-04 Kanaflex Corporation 熱可塑性樹脂製型枠
KR102151343B1 (ko) * 2019-04-01 2020-09-02 김명준 거푸집용 프레임부재와 이를 이용한 거푸집 프레임

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792552A (en) * 1996-04-12 1998-08-11 Providence Industries, L.L.C. Reusable concrete form panel sheeting

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2576723B2 (ja) * 1991-08-01 1997-01-29 茂樹 金尾 型 枠
JP2636576B2 (ja) * 1991-08-08 1997-07-30 株式会社イナックス コンクリート打設用型枠及び型枠用シート
JP3234680B2 (ja) 1993-07-13 2001-12-04 ブラザー工業株式会社 プリンタ
JPH0725144U (ja) * 1993-10-12 1995-05-12 城山興産株式会社 積層板材
JPH0893217A (ja) 1994-09-28 1996-04-09 Shoei Kagaku Kogyo Kk コンクリート型枠用板体
JPH08100523A (ja) 1994-09-29 1996-04-16 Toshiichi Daimatsu コンクリート型枠
JPH08246667A (ja) * 1995-03-09 1996-09-24 Toyo Tire & Rubber Co Ltd コンクリート打込み用軽量型枠材
JPH09189127A (ja) * 1996-01-12 1997-07-22 Mitsubishi Chem Corp 積層シート製のコンクリート打設用型枠

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5792552A (en) * 1996-04-12 1998-08-11 Providence Industries, L.L.C. Reusable concrete form panel sheeting

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9915743A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004070139A1 (es) * 2003-02-04 2004-08-19 Sanchez Renasco Jesus Pieza de encofrado para obtencion de cornisas y similares
ES2222078A1 (es) * 2003-02-04 2005-01-16 Jose Maria Sanchez Reñasco Pieza de encofrado para obtencion de cornisas y similares.

Also Published As

Publication number Publication date
JP3884142B2 (ja) 2007-02-21
CN1241236A (zh) 2000-01-12
JPH11100993A (ja) 1999-04-13
KR20000069026A (ko) 2000-11-25
EP0940525A4 (de) 2000-12-13
WO1999015743A1 (fr) 1999-04-01

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