JPH1113279A - Concrete placing form panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce weight, and repeatedly use it by forming plural unit foaming resin plates having a surface layer which protects a surface of a foaming resin plate and has a concrete easily separable characteristic, on the obverse and reverse of the foaming resin plate. SOLUTION: This form panel is composed of plural unit foaming resin plates 11 having a foaming resin plate 17 and a surface layer 12 having a concrete easily separable characteristic on the obverse and reverse of this foaming resin plate 17. The surface layer 12 is formed of a film composed of resin such as polyolefine or a complex containing such resin. A concrete placing form panel 10 formed in this way is removed after placed concrete is hardened, but in the concrete placing form panel 10 used once in this way, since the surface layer 12 has a concrete easily separable characteristic, when the form panel 10 is removed, the panel is hardly damaged, and can be repeatedly used. Therefore, it is very lightweight, and can be repeatedly used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight concrete casting panel which can be repeatedly used as a formwork, for example, when constructing a relatively high wall from a dug up underground.

[0002]

2. Description of the Related Art Conventionally, when constructing a concrete wall constituting a building, formwork made of wood has been continuously arranged, and these wooden formwork has been fixed vertically and horizontally. Later, a method of casting concrete between the wooden forms has been adopted.

[0003] However, such a wooden form has minute irregularities on its surface, and hardened concrete enters into these irregularities, and it takes a long time to peel the form from the concrete, and it requires heavy labor. is there. Moreover, the surface of the wooden formwork is often damaged during such demolding, and the wooden formwork thus damaged can hardly be reused.

[0004] Further, the wooden formwork conventionally used has a considerable weight, and the work of laying such a wooden formwork while fixing the formwork vertically and horizontally is extremely labor intensive. There is a problem that it is easy to cause a disaster.

Recently, a driving form made of a foamed resin has been used. Such a driving form made of a foamed resin uses a panel made of a resin foam as a form when casting concrete, and uses this resin foam as a heat insulating material after casting the concrete. Later, the resin foam used as the mold is left as it is, and the panel made of the resin foam is not removed. When a panel made of a resin foam is used as the driving mold as described above, the mold made of the panel made of the resin foam is extremely expensive. However, the panel made of this resin foam functions as a formwork when casting concrete, but it also functions as a heat insulating material after casting concrete.Therefore, after casting concrete, the formwork is removed and heat insulation is performed again. Considering the labor of arranging the members, such a driving form is not necessarily expensive. However, even if an attempt is made to use a panel made of a resin foam in the same manner as a normal wooden formwork, the unit price of the panel made of a resin foam is ten times or more that of the wooden formwork. It is almost impossible to use panels made of resin foam instead. It is also conceivable to reduce the cost per use by repeatedly using a panel made of a resin foam, but fine irregularities formed by bursting of bubbles are formed on the surface of the panel made of the resin foam. Therefore, even if a panel made of resin foam is actually used as a mold,
When the formwork made of the panel made of the resin foam is removed, the resin foam adheres to the concrete wall surface side and the surface becomes rough, and the panel made of such a resin foam cannot be used at all.

[0006] Further, in the case of a formwork made of a panel made of a resin foam, a concrete wall formed by casting concrete is bent by its own weight, as compared with a wooden formwork. Therefore, in order to form a concrete wall without deflection, it is necessary to arrange the flutter at a shorter interval than when using a wooden formwork,
Even from this point, the panel made of the resin foam has not been actually used as a mold.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lightweight concrete formwork panel that can be repeatedly used.

Another object of the present invention is to provide a concrete casting form panel which is hard to bend particularly in the width direction. A further object of the present invention is to provide a concrete casting formwork panel which can be easily removed.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a concrete casting mold comprising a plurality of unit foamed resin plates having a surface layer which is easy to peel off concrete and protects the surface of the foamed resin plate. In the frame panel.

According to the present invention, a plurality of unit foam resin plates having a surface layer which is easy to peel off concrete are formed on the front and back surfaces of the foam resin plate while protecting the surface of the resin foam slope. A concrete casting formwork panel, wherein an upper end surface of the unit foam resin plate and a lower end portion of an adjacent unit resin foam resin plate are connected to each other by a connecting member that is horizontally laid. Concrete casting formwork panel.

The concrete casting formwork panel of the present invention is very lightweight because it uses a resin foam. In addition, since the foam resin plate has a surface layer having a property of easily peeling concrete on the front and back surfaces, the foam resin plate is used as a mold, and after the concrete is hardened, the panel is damaged when the panel is removed. And the panel of the present invention can be used repeatedly. Further, by providing this surface layer, the strength of the resin foam panel is increased, and the panel is hardly bent even when concrete is cast. Furthermore, since a rigid horizontal member is laid in the panel of the present invention in the horizontal direction, the horizontal member can also prevent the panel of the present invention from bending.

Furthermore, although the panel of the present invention has a horizontal member as described above, no hard member is arranged in the vertical direction of the panel itself. Therefore, since the panel of the present invention has flexibility in the vertical direction, after the concrete has hardened, if the panel of the present invention is peeled off, for example, from above, the panel can be easily removed. it can. Since the surface layer having the property of easily separating concrete is formed on the surface of the panel (contact surface with concrete) of the present invention, the panel is easily separated from concrete even when the panel is removed. Therefore, the panel is less likely to be damaged.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Next, the concrete casting form panel of the present invention will be described in more detail with reference to the drawings.

According to the present invention, there is provided a formwork panel for concrete casting, comprising a plurality of unit foamed resin plates having a surface layer on the front and back surfaces of the foamed resin plate, which protects the surface of the foamed resin plate and has an easily peelable concrete layer. Consists of

FIG. 1 is a partial sectional view showing the structure of a concrete formwork panel of the present invention. The concrete casting formwork panel of the present invention comprises a foamed resin plate made of a resin foam, and a plurality of unit foamed resin plates each having a surface layer having concrete releasability on the front and back surfaces of the foamed resin plate. .

The resin foam constituting the panel of the present invention includes expanded polystyrene, expanded polyolefin (eg, expanded polyethylene, expanded polypropylene), expanded polyvinyl chloride, expanded polyvinylidene chloride, viscose sponge,
Thermoplastic resin foams such as rubber foam, EVA foam, ABS foam, nylon foam, and acrylic foam, and thermosetting resin foams such as urethane foam, phenol foam, urea foam, silicone foam, and epoxy foam can be used. In particular, in the present invention, it is preferable to use a thermoplastic resin foam, more preferably a foam, and furthermore, a foamed polystyrene, a foamed polyolefin (eg, foamed polyethylene, foamed polypropylene), a foamed polyvinyl chloride. It is particularly preferred to use them. Among these foamed resins, foamed polystyrene and foamed polyolefin, especially foamed polyethylene, foamed polyvinyl chloride, and foamed polyvinylidene chloride are particularly preferable because they are inexpensive and easy to produce. These resin foams can be produced by foaming a resin as a raw material by an ordinary method. In particular, in the present invention, it is preferable to manufacture a foamed resin plate by in-mold foaming or extrusion foaming. Therefore, expanded polystyrene or expanded polyethylene is particularly preferred for such a foaming method.

Such a resin foam is obtained by foaming the raw material resin at an expansion ratio of usually 10 to 80 times, preferably 15 to 50 times. If the expansion ratio is significantly lower than the above lower limit, the advantage of a foam cannot be secured. Further, in the foam having the expansion ratio exceeding the upper limit, a large number of open cells are formed in the foam, and the strength of the expanded resin plate cannot be secured. The panel of the present invention cannot be repeatedly used as a concrete casting formwork.

The size of such a foamed resin plate can be appropriately set.
-450 cm, preferably 90-400 cm, height is usually 20-200 cm, preferably 30-150 cm, and thickness is usually 30-200 mm, preferably 50-150 mm. The foamed resin plate having the above width and height is particularly easy to handle and is preferable. Further, the thickness of the foamed resin plate is preferably as described above so as to withstand the concrete pressure when cast. However,
If the thickness exceeds the above range, it becomes difficult to handle the panel of the present invention, and the volume of the formwork with respect to the volume of the concrete to be cast becomes too large, resulting in poor practicality.

In the panel of the present invention, a surface layer which is easily peelable from concrete is formed on the front and back surfaces of the foamed resin plate as described above. This surface layer protects the foamed resin plate as described above and ensures the strength of the panel of the present invention. That is, a foamed resin plate having no surface layer is
Although cracking occurs when a relatively weak bending stress is applied, the strength of the foamed resin plate against bending stress is significantly improved by forming a surface layer on the foamed resin plate as employed in the present invention. And, this surface layer has a property that it is easily peeled off from the poured concrete.

The surface layer having such characteristics is usually made of polyolefin, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyester, polyamide, acrylic resin, silicone resin, fluorine resin, epoxy resin, phenol resin, urethane resin, etc. And a composite containing such a resin.

In the present invention, examples of the polyolefin used as the resin forming the surface layer include polyethylene, LLDPE, polypropylene, ethylene / α-olefin copolymer (eg, ethylene / propylene copolymer), unsaturated Examples thereof include carboxylic acid-modified polyethylene and unsaturated carboxylic acid-modified polypropylene, and examples of polyester include nylon 6, nylon 66, nylon 612, nylon 12, aromatic polyamide, and semi-aromatic polyamide. Examples of the polyester include polyethylene terephthalate. Examples of the acrylic resin include, in addition to polymethyl (meth) acrylate, methyl (meth) acrylate, other (meth) acrylate, styrene,
Copolymers with (meth) acrylic acid and the like can be mentioned.

This surface layer may be formed of the above-mentioned resin alone, or may be a resin composition containing the above-mentioned resin. Further, in order to improve the affinity with the foamed resin plate, the resin may be modified, and the so-called F made of a mixture of the resin and a fibrous material may be used.
It may be RP, or may be a laminate.

For example, when the surface layer of the panel of the present invention is formed using a film made of the above-mentioned resin, the surface facing the foamed resin plate is roughened, and the surface facing the cast concrete is roughened. It is preferably mirror-finished. Further, a layer containing an adhesive component may be provided on the surface facing the foamed resin plate. Further, the film may be a laminate composed of a plurality of resins. For example, a polyolefin film or a polyvinyl chloride film and a silicone resin film are laminated using a known method, a layer made of a polyolefin film or a polyvinyl chloride film is in contact with the surface of the foamed resin plate, and the silicone is in contact with the concrete. By arranging the layer made of the resin film, the foamed resin plate and the surface layer can be firmly adhered to each other, and the releasability between the cast concrete and the panel of the present invention is improved.

The surface layer is made of FRP (and FRT).
P). Where FRP is
It is a plastic composite reinforced with fiber, and the resin forming the FRP is a thermoplastic resin (eg, polyamide,
Polyolefin, thermoplastic polyester such as PET or PBT, polyphenylene sulfide, etc.) or thermosetting resin (eg, unsaturated polyester, epoxy resin,
Any of phenol resin, vinyl ester, diallyl phthalate resin, urethane resin and the like can be used. Here, examples of the fiber used as the reinforcing material include glass fiber, carbon fiber, boron fiber, organic fiber, and metal fiber.

The thickness of such a surface layer varies depending on the type of the resin forming the surface layer.
m, preferably in the range of 10 to 1000 μm. The surface layer and the foamed resin plate can be bonded together using an adhesive, or when foaming the foamed resin plate, the film is laid beforehand in a mold and the resin is foamed to form an adhesive. They can be integrated without intervening layers. Alternatively, a layer made of a heat-melt adhesive resin may be interposed between the film and the foamed resin plate, and the film may be heated and pressed under pressure from above the film.

In the concrete casting formwork panel of the present invention, an adhesive is used for bonding the foamed resin plate to the film forming the surface layer and for joining the unitary foamed resin plates arranged in the longitudinal direction. Can be. The adhesive used here is not particularly limited, and a pressure-sensitive adhesive, a thermocompression adhesive, a reaction-curable adhesive, or the like can be used.
For example, pressure-sensitive adhesives such as rubber adhesives, acrylic adhesives, vinyl acetate adhesives, thermocompression adhesives such as maleic acid-modified polyolefins, epoxy adhesives, urethane adhesives, and reactive curable acrylics A reactive adhesive such as a system adhesive can be used.

Since the layer formed on the surface of the foamed resin plate in this way usually has higher adhesiveness to the surface of the foamed resin plate than concrete, if this panel is used as a formwork, the cast concrete can be used. However, in order to obtain better peelability, it is preferable to coat a release agent on the surface of the surface layer that adheres to concrete. Examples of the release agent used here include silicone oil and surfactant.

The panel of the present invention is formed by connecting a plurality of unit foam resin plates having the above-described configuration in the longitudinal direction. FIG.
Fig. 1 shows an example of a concrete casting form panel of the present invention in which unit foamed resin plates are vertically connected.

In FIG. 1, reference numeral 10 denotes a formwork panel for concrete, reference numeral 11 denotes a unit foam resin plate, and reference numerals 12a and 12b denote surface layers. In FIG. 1, the surface layers 12a, 12b
Are bonded by adhesive layers 13a and 13b, respectively.

The concrete formwork panel 10 of the present invention
Is a unit foam resin plate 11 having the above configuration,
It is constituted by connecting a plurality of pieces vertically. In the panel of the present invention, the upper end of the unit foam resin plate 11 and the lower end of the unit foam resin plate 11 disposed thereon are connected so as to be in contact with each other. Adhesive or the like can be used for joining the unit foam resin plates 11, 11,..., And as shown in FIG. The upper and lower unit foam resin plates 11, 11... Can be connected by connecting the horizontal members on the front and back surfaces. In this manner, the horizontal member 14 arranged at the joint of the unit foamed resin plates 11, 11,... May be any material as long as it is harder than the resin foamed plate 17. And the like.

As is apparent from FIG. 1, the upper end and the lower end of the unit foamed resin plate 11 are cut out by the thickness of the transverse member 14, and when the transverse member 14 is arranged, the unit foam resin The surface of the plate 11, the surface of the horizontal member 14, and the surface of the next unit foamed resin plate 11 are flush with each other.

In FIG. 1, the surface layers 12a, 12a
b is disposed along the back surface side of the horizontal member 14 (that is, the front surface of the unit foam resin plate).
2b can also be laid so as to be located on the surface of the horizontal member 14.

In this manner, a plurality of unit foam resin plates 11
Is preferably connected in the vertical direction via the horizontal member 14, whereby the concrete casting formwork panel 10 of the present invention can be formed. There is no limitation on the number of unit foam resin plates forming the concrete casting formwork panel 10, and a plurality of foam resin plates are connected in accordance with the height of the concrete wall to be constructed.

As described above, the panel 10 of the present invention in which a plurality of unit foam resin plates 11 are connected in the vertical direction via the horizontal member 14 preferably has no rigid members arranged in the vertical direction. Since the horizontal members 14 are arranged in the horizontal direction, the strength in the horizontal direction is high, and bending or the like is unlikely to occur. On the other hand, since no hard members are arranged in the vertical direction, for example, when the panel is peeled off from the upper end of the panel after concrete casting, the concrete wall constructed by bending the panel in the vertical direction is used. The panel can be peeled off.

The concrete casting form panel of the present invention can be variously modified. For example, as shown in FIG. 2, it is preferable to dispose the reinforcing band 15 in the longitudinal direction between the surface layers 12 a and 12 b and the foamed resin plate 17. The reinforcing band 15 can be formed from a uniaxially stretched film of a synthetic resin or the like. Examples of the uniaxially stretched film of the synthetic resin include a uniaxially stretched film of polyethylene and a uniaxially stretched film of polypropylene. It is preferable to arrange a plurality of such reinforcing bands 15 on the front surface and / or the back surface of the foamed resin plate 17, usually at intervals of 1 to 50 cm. Reinforcing band 15 thus arranged
Lay the surface layer from above. The uniaxially stretched film suitably used as the reinforcing band 15 has a very high strength in the length direction, and by arranging the reinforcing band 15 in this manner, the bending strength of the panel of the present invention is improved. Is significantly higher. Further, the reinforcing band 15 may be arranged so as to connect the plurality of unit foam resin plates 11.

The concrete casting form panel 1 of the present invention
For example, as shown in FIG. 3, a gap 31 for placing concrete is formed by interposing a spacer or the like as shown in FIG. And the formwork panel 10 of the present invention of concrete casting according to the present invention is connected in the lateral direction to form a formwork. Since the concrete casting formwork panel 10 of the present invention has the horizontal members 14, the horizontal flaps 33 are sufficient to connect the vertical flaps 32, and the number of horizontal flaps is significantly reduced as compared with the related art. Can be.

After forming the form in this way, concrete is poured, and after the concrete has hardened, the flutter is removed.
The formwork can be removed by peeling the concrete casting formwork panel of the present invention from the upper end.

The concrete casting form panel of the present invention which has been used once as described above has a surface layer having a property of easily peeling concrete, so that the panel is damaged when the form panel is removed. Less and can be used repeatedly. Furthermore, the concrete casting formwork panel of the present invention can be used at least twice using the front and back surfaces, and since the panel is less likely to be damaged when removing the formwork, at least 10 times on one side. It can be used repeatedly. Therefore, the cost required for the concrete formwork is significantly reduced as compared with the case where a wooden formwork conventionally used is used. Further, the concrete casting formwork panel of the present invention is very lightweight because the main part is formed of a resin foam, and the labor required for the work of laying the formwork and the work of removing the formwork is significantly reduced. Is done.

In addition, the form panel for concrete casting according to the present invention can be freely set in height by a combination of unit foam resin plates, and a panel having a considerably high height is also lightweight. Installation by human power is possible.

Further, by forming the connecting portion with the panel adjacent to the end of the horizontal member, the bending strength of the form in the horizontal direction becomes extremely high, so that it is almost unnecessary to use flutter. Eliminates the need to use flutter.

[0041]

According to the present invention, there is provided a formwork panel for concrete casting, comprising a plurality of unit foams having a surface layer having an easy-peeling property on the front and back surfaces of the foamed resin plate while protecting the surface of the foamed resin plate. Formed from a resin plate, the concrete casting formwork panel of the present invention further comprises a surface layer on the front and back surfaces of the foamed resin plate, which protects the surface of the resin foamed slope and has a property of easily peeling concrete. Is a concrete casting form panel in which a plurality of unit foamed resin plates are connected in the vertical direction, and an upper end surface of the unit foamed resin plate and a lower end portion of the phosphorus-level unit resin foamed resin plate are arranged horizontally in the horizontal direction. Since it is connected by the bridged connecting member, it is very lightweight and can be used repeatedly. Therefore, the cost required for the formwork is significantly reduced as compared with the case where a wooden formwork that has been conventionally used is used.

The concrete casting form panel of the present invention is 1/5 to 1/1 of the conventional wooden form panel.
It has a weight of only about 50 and is very easy to handle. In addition, since the strength in the horizontal direction is secured by the horizontal member, the mold can be formed with almost no horizontal flutter.

Further, by forming a connecting portion with the panel adjacent to the end of the horizontal member, the bending strength in the horizontal direction of the form is extremely increased, and the form can be laid without using flutter. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a concrete casting formwork panel of the present invention.

FIG. 2 is a view showing another example of the concrete casting formwork panel of the present invention.

FIG. 3 is a view showing an example of a formwork using the concrete casting formwork panel of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Form panel for concrete casting 11 ... Unit foam resin plate 12 ... Surface layer 13 ... Adhesive layer 14 ... Horizontal member 15 ... Reinforcement band 17 ... Foaming Resin plate 31 ・ ・ ・ Gap 32 ・ ・ ・ Vertical flutter 34 ・ ・ ・ Horizontal flutter

Claims (6)

[Claims] 1. A concrete casting form panel comprising a plurality of unit foam resin plates having a surface layer which protects the surface of the foam resin plate and has an easily releasable concrete layer formed on the front and back surfaces of the foam resin plate. 2. A concrete molding method comprising a plurality of unit foamed resin plates, each having a surface layer capable of protecting the resin foaming slope formed on the front and rear surfaces of the foamed resin plate and having a surface layer capable of easily peeling concrete, connected in a longitudinal direction. An installation form panel, wherein an upper end surface of the unit foamed resin plate and a lower end portion of an adjacent unit resin foamed resin plate are connected by a connecting member that is horizontally laid horizontally. Formwork panel for concrete casting. 3. The foamed resin plate is made of at least one kind of foamed resin selected from the group consisting of foamed polystyrene, foamed polyethylene, and foamed polypropylene, and the foaming resin has an expansion ratio of 20 to 80 times. 3. The concrete casting formwork panel according to claim 1 or 2, wherein: 4. The method according to claim 1, wherein the surface layer is a film formed of at least one resin selected from the group consisting of polyolefin, polyvinyl chloride and polyvinylidene chloride, or a composite film containing these resins. The formwork panel for concrete casting according to any one of claims 1 to 3. 5. The method according to claim 1, wherein the thickness of the foamed resin plate is in the range of 30 to 200 mm, and the thickness of the surface layer is in the range of 1 μm to 5 cm. The concrete casting formwork panel according to any one of items 3 and 4. 6. Between the front and back surfaces of the foamed resin plate and the surface layer,
The concrete casting formwork panel according to any one of claims 1 to 4, wherein a plurality of reinforcing bands made of a polyolefin uniaxially stretched film are arranged along a longitudinal direction of the panel. .