JPH0833034B2 - Insulation board that also serves as a formwork, and concrete-casting formwork panel structure using the board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a heat insulating board that also serves as a formwork and a concrete driving formwork panel structure using the board, and more specifically, in heat insulating construction concrete driving of steel frame reinforced concrete construction or reinforced concrete , A heat insulating board is also used as a formwork, the heat insulating board is bonded together with the hardening of the concrete after the concrete is poured, and it has excellent strength that can become a heat insulating concrete wall surface and has good dimensional stability. The present invention relates to a concrete driving form panel structure used as at least one of the concrete driving forms.

[Conventional technology] Conventionally, heat insulation construction of concrete wall surfaces has been widely and generally performed as energy saving for buildings. In the case of reinforced concrete (RC) construction or steel frame reinforced concrete (SRC) construction, heat insulation board in such heat insulation construction As the above, a synthetic resin foam is widely adopted in terms of heat insulation and hygroscopicity.

In the construction in this case, from the viewpoint of price or shortening of the construction period, as shown in FIG. 4, inside the concrete driving form 6, 6 forming the concrete wall surface, the heat insulating board 12 with double-sided paper or the synthetic resin A common method is to fix the foam plate by fastening it with nails 13, drive it into concrete, then harden it to bond the heat insulating board or foam plate to the concrete, and then remove the formwork 6.

This is because the heat insulating board or foam plate to be bonded to the concrete is weak in strength and cannot withstand the lateral pressure at the time of driving concrete into the concrete, so that it is complicated to separately provide the concrete form.
In addition, there is a risk that the board or foam plate will be deformed due to water absorption from the injected concrete or temperature change.If the nailing with the formwork is insufficient, there will be a gap between the formwork. , The surface of the board, etc. is squeezed (water plaster), and as a result the concrete is filled in the connection part between the board or the foam board and the form, heat bridge cold bridge etc. occurs, and the heat insulation performance of the building becomes a problem. was there.

On the other hand, as a solution to these problems, a heat insulating board has been proposed in which a hard surface material that withstands lateral pressure when concrete is poured is attached to the surface of the heat insulating plate (JP-A-61-2940).
No. 48).

And this type of heat insulation board is quite effective as a shortening of the construction period because the board itself constitutes the formwork of the concrete driving formwork, and the hard face material stuck to the surface of the heat insulation plate also serves as the interior base. It was also an efficient construction.

[Problems to be Solved by the Invention]

Then, in the known heat insulating board, by using a rigid synthetic foam having a certain strength or more as a heat insulating plate, by sticking a soft surface material having a laminated structure based on a specific material on both sides of the foam. It is confirmed that it can be a good concrete driving form, and that the concrete driving form panel structure using such an insulating board can be a simple heat insulation frame construction means,
The soft surface material to be attached to the heat insulating foam surface must have a three-layer structure of at least a reinforcing layer, a waterproof layer and an adhesive surface layer, and its manufacturing requires complicated steps such as sequentially bonding each material. It is necessary, and in particular, it is considered that the waterproof layer is indispensable as a concrete form material, and there is a problem that the manufacturing cost increases.

It is an object of the present invention to solve the above problems, simplify the structure, and provide a heat insulating board that can be economically used as a concrete formwork and a concrete driving formwork panel structure using the heat insulation board.

[Means for solving the problem]

In order to achieve the above-mentioned object, the inventors of the present invention have conducted extensive studies and, as a result, have a structure in which an adhesive composed of a polyethylene thin film for adhesion as an adhesive is interposed between the respective materials constituting the heat insulation board, and a structure in which the materials are bonded together. By doing so, it was found that the present invention can be used as a heat insulating board that also serves as a concrete form without providing a moisture-proof layer between the reinforcing layer and the bonding surface layer, and has completed the present invention.

That is, the present invention is that, on both front and back surfaces of a heat insulating layer made of a rigid synthetic resin foam, the foam polyethylene film is sequentially heated from the foam surface with an adhesive polyethylene thin film interposed therebetween, and the adhesive polyethylene is absorbed into each other. A heat insulating board also serving as a form is characterized in that a soft surface material having at least a two-layer structure including a bonded reinforcing layer and an adhesive surface layer is laminated.

Further, the present invention relates to a concrete driving formwork panel structure using the board. The panel structure is a concrete driving form in which two formwork which are arranged side by side relative to each other are fixed by a temporary reinforcing material to form a concrete driving space. In the formwork panel structure, the concrete driving formwork panel structure characterized in that the heat insulating board also used as the formwork is used as at least one formwork.

[Action]

 The configuration and operation of the present invention will be described.

In the present invention, as a soft face material to be laminated on both front and back surfaces of a heat insulating layer made of a hard synthetic resin foam, heating is performed sequentially from the foam surface with an adhesive polyethylene thin film as an adhesive intervening, and the adhesive polyethylene is absorbed. It is necessary to have at least a two-layer structure consisting of a reinforcing layer and an adhesive surface layer which are adhered together in the state.

In this case, examples of the heat insulating layer made of rigid synthetic resin foam include polystyrene foam, as well as hard urethane foam, phenol foam, isocyanurate foam, epoxy foam, and the like. The thickness of the heat insulating layer is not particularly limited and can be set arbitrarily according to the construction environment.

As described above, the soft face material has at least a two-layer structure consisting of a reinforcing layer and an adhesive surface layer in order from the foam surface of the heat insulating layer, and the reinforcing layer is, for example, a water resistant liner, a water resistant craft, a glass fiber nonwoven fabric, or asbestos. It can be composed of at least one selected from the group consisting of non-woven fabric and calcined carbon paper. This reinforcing layer bears the compressive tensile stress on the front and back surfaces generated during concrete pouring in the heat insulating board of the present invention, and secures dimensional stability against changes in the natural environment such as rain and direct sunlight from formwork assembly to concrete pouring. It is for.

In this case, it is sufficient that at least the structure of the reinforcing layer-adhesive surface layer is adopted from the foam surface as the soft surface material, and the reinforcing layer and the adhesive surface layer exemplified above are appropriately combined to form a plurality of layer structures. It is also possible.

The adhesive surface layer is not particularly limited, and examples thereof include asbestos paper, glass fiber non-woven fabric, polyester fiber non-woven fabric, calcium carbonate and pulp, glass mixed paper (carbon charcoal paper),
It is composed of at least one selected from the group consisting of, and any material having excellent adhesiveness to concrete, GL bond, rubber adhesive, and epoxy adhesive may be used.

This adhesive surface layer enables the heat insulating board of the present invention to adhere to concrete on the one hand and to the interior material on the other hand.

In the present invention, in order to bond each of the layers, for example, a liner paper as a reinforcing layer and a calcium carbide paper as an adhesive surface layer, heat bonding is performed with an adhesive polyethylene (PE) thin film interposed as an adhesive. The point is characteristic. The PE thin film for adhesion is an extremely thin layer of 20 to 30μ, and when the PE thin film is interposed and heated when laminating each material, PE is absorbed in the constituent material of each layer and becomes an independent layer. Does not exist. However, the PE and the adhesive surface layer that have absorbed the PE for adhesion are provided with moisture resistance by the PE, and can exhibit the functions required as a concrete formwork.

When the heat insulating board of the present invention configured as described above is used as at least one formwork of a concrete-casting formwork panel structure, two heat-insulating boards are installed side by side as ordinary concrete-casting formwork panels. When fixing the formwork (control panel material) with a hypothetical reinforcing material, for example, a putter material, and forming a concrete driving space between the two formworks, without using a control panel material as at least one formwork, the heat insulation of the present invention The board is used as it is.

Therefore, as compared with the conventional method, no extra control panel material is used and the board is not deformed and the heat insulating board of the present invention is adhered to the concrete as the concrete hardens to integrally form a good heat insulating wall. It is possible.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 is a sectional view of an embodiment of the heat insulating board of the present invention.

The heat insulation board 1 of this example uses extruded polystyrene foam as the heat insulation layer 2. The front and back surfaces of the heat insulation layer 2 are joined together by heating, for example, with an adhesive polyethylene thin film interposed therebetween for reinforcement. The soft surface material 5 having at least a two-layer structure composed of the layer 3 and the adhesive surface layer 4 is laminated.

In this case, the heat insulating board 1 may adopt at least a two-layer structure of the reinforcing layer 3 and the adhesive surface layer 4 as the configuration of the soft surface material 5. During this period, it will withstand the lateral pressure of concrete without being deformed, and the adhesiveness with concrete will be secured.

Even during construction, since the reinforcing layer that has absorbed polyethylene for adhesion and the adhesive surface layer have moisture resistance by themselves, they exhibit the necessary functions as a concrete formwork without the need to separately form a moisture-proof layer. can do.

The layer structure of the soft face material 5 is not limited to this, and can be variously changed. Second modification
Listed in Figures a and b.

In FIG. 2 a, the soft surface material 5 ′ laminated on the front and back surfaces of the heat insulating layer 2 includes the reinforcing layer 3, the reinforcing layer 3 and the adhesive surface layer 4.
In FIG. 7B, the soft surface material 5 ″ constitutes a four-layer structure of the reinforcing layer 3, the reinforcing layer 3 and the adhesive surface layer 4.

Next, the concrete-casting formwork panel structure of the present invention will be described.

FIG. 3 is a vertical sectional front view showing a main part of one embodiment of the panel structure of the present invention.

That is, in the panel structure of the present invention, in two molds arranged side by side relative to each other, the heat insulating board 1 of the present invention is used as one mold, and the normal control panel material 6 is used as the other mold, This is a panel structure 14 in which a concrete driving space 11 is formed by fixing with temporary reinforcements, for example, pattern materials 7 and 8, for example, with a separator 9 and a foam tie 10.

In FIG. 3, the heat insulating board of the present invention is used for only one of the molds, but it can be adopted for both molds.

For example, in the conventional panel structure shown in FIG. 4, the control panel materials 6, 6 are used as molds for both, the heat insulating board 12 is fixed with nails 13, 13 and then concrete is poured into the concrete driving space 11. , Then control panel material 6, 6
It can be said that it is particularly simple in consideration of the time and effort to remove.

〔The invention's effect〕

Since the present invention is configured as described above,
INDUSTRIAL APPLICABILITY The heat insulating board of the present invention can be used as a formwork as it is without using an extra formwork for RC and SRC concrete placement, and the surface of the board is a soft surface material. Therefore, it has an advantage that it can be directly laminated.

Even during construction, the reinforcing layer that has absorbed polyethylene for adhesion and the adhesive surface layer have moisture resistance by themselves, so even if it is necessary to form a moisture-proof layer separately, the necessary function as a concrete formwork can be achieved. can do.

Further, it can be cut into an arbitrary size according to the building on site and can be provided at low cost.

In addition, since long boards can be used, the joints of the heat insulating boards are reduced, the heat insulating performance of the building can be improved, labor saving such as damage to the formwork, disassembly and transportation is improved, and the surface of the board is GL bond, Since it has excellent adhesion suitability for rubber-based adhesives and epoxy-based adhesives, it can be used as an optional base plate and has excellent performance as an interior base material.

Therefore, the concrete-casting formwork panel structure using this heat insulating board is particularly easy to construct.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the heat insulating board of the present invention, and FIG.
FIGS. A and b are cross-sectional views of another embodiment, FIG. 3 is a vertical sectional front view showing an essential part of an embodiment of the panel structure of the present invention, and FIG.
The figure is a vertical sectional front view of a conventional panel structure. 1 ... Insulation board, 2 ... Insulation layer, 3 ... Reinforcement layer, 4 ... Adhesive surface layer, 5 ... Soft surface material 9 ... Control panel material, 10 ... Pattern material, 11 ... Concrete driving space, 14 …… Panel structure

Claims (2)

[Claims] 1. A heat-insulating layer made of a rigid synthetic resin foam is heated on both front and back surfaces of a heat insulating layer by sequentially interposing an adhesive polyethylene thin film as an adhesive from the foam surface and adhering to each other while the adhesive polyethylene is absorbed. A heat insulating board that also serves as a formwork, characterized in that a soft surface material having at least a two-layer structure including a reinforcing layer and an adhesive surface layer is laminated. 2. In a concrete-casting formwork panel structure in which two formworks arranged side by side relative to each other are fixed by a temporary reinforcing material to form a concrete-driving space, as at least one formwork; a hard synthetic resin foam At least a reinforcing layer and an adhesive surface layer which are adhered to each other in a state where the adhesive polyethylene thin film as an adhesive is sequentially heated on both front and back surfaces of the heat insulating layer consisting of The concrete-casting formwork panel structure characterized by laminating soft surfaces having a two-layer structure.