JP2823916B2 - Floor construction method and heat insulation plate that also serves as a formwork for building a heat insulation frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a floor slab for constructing a first-floor floor slab using a heat insulating plate also serving as a formwork for concrete casting in the construction of a reinforced concrete structure. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method and a construction method, and also relates to a heat insulation plate that also serves as a formwork for building a heat insulation frame applied to a concrete structure in general.

(Problems to be Solved by the Prior Art and the Invention) In a reinforced concrete structure such as an apartment house in which an underfloor space for ventilation is formed under a first-floor slab.
Conventionally, floor slabs have been constructed by assembling supports such as supports, pulling girders, joists, etc. on a foundation slab, laying a floor formwork on top of it, placing insulation on top of this, and then placing reinforcement and concrete. It is performed by casting.

In this construction method, it is necessary to remove the floor form after the concrete has hardened, but since the floor form of one unit has a fixed size, it is almost impossible to discharge it from the underfloor ventilation port. When the concrete is poured, an opening having a size corresponding to the width of the form is provided in advance on the floor surface, and after the form is carried out, the form is closed with concrete.

Even when carrying out from the underfloor ventilation port, the underfloor ventilation port will be larger than necessary.Therefore, work to cover the extra opening after casting concrete on the floor as well as forming an opening in the floor Is required.

The present invention has been made in view of the above background, and proposes a formwork in which the trouble of removing the formwork is eliminated, and a floor construction method using the formwork.

(Means for Solving the Problems) In the present invention, a foamed plastic heat insulating plate in which a plastic film is laminated on one side of a heat insulating plate is used for the floor formwork, and the loading load and the concrete placing pressure on the plastic film during construction. The tensile strength of the plastic film and the out-of-plane rigidity of the heat insulating plate are secured by the plastic film. The above-mentioned conventional problems caused by using a mold are solved.

Construction of the floor is done by placing an insulation board that also serves as the above-mentioned formwork with the plastic film side facing down on the supporter assembled in the underfloor space position, arranging reinforcement on this insulation board, and concrete. It is performed by casting.

The formwork insulation board is made by bonding a plastic film such as a polyester film with high tensile strength to the entire surface on one side of the insulation board made of expanded polystyrene board and laminating, and the other side of the insulation board is used as an adhesive surface with concrete. It is formed by exposing as it is.

This formwork and heat-insulating plate is disposed on one surface of the skeleton of the reinforced concrete structure in addition to the floor slab, and also serves as a formwork for concrete casting while ensuring heat insulation of the skeleton.

When the plastic film is a polyester film, the polyester film is heat-laminated to the heat insulating plate with the polystyrene film as an adhesive and the polystyrene film facing the heat insulating plate.

(Embodiment) The invention of claim 1 uses a form / heat-insulating plate A in which a plastic film 2 having high tensile strength is adhered to one surface of an insulating plate 1 and laminated as a floor form, and a first-floor floor slab is used. This is a method of constructing as an insulated floor.

The mold and heat insulating plate A is placed on the support with the plastic film 2 resisting the tensile force facing downward. The tension of the plastic film 2 located on the lower side bears the tensile force due to the loading load at the time of reinforcing arrangement work or concrete casting, and at the same time, the form of the heat insulating plate 1 is maintained, and the form and heat insulating plate A Has the function of a mold by integrating the plastic film 2.

As shown in FIGS. 2 and 3, a support 4 is erected on the foundation slab 3 at an appropriate interval as shown in FIGS. 2 and 3, and a girder 5 is erected thereon. Lay,
After laying the form and heat insulating plate A on the joist 6 and the pier 7, the slab streaks 8 are arranged, and the concrete 9 is cast.
It is performed in the manner described.

As described above, the mold and heat-insulating plate A also functions as a mold, and at the same time, becomes a discarded mold. Therefore, there is no need to separately lay a mold, and it is not necessary to remove the concrete 9 after it has hardened.

For this reason, it is not necessary to provide an opening for carrying out the formwork on the floor surface, and it is not necessary to close the opening, and after the concrete 9 is hardened, it is possible to shift to the construction on the upper floor.

As shown in FIG. 1, the mold and heat insulating plate A according to the second aspect of the present invention has a plastic film 2 on one surface of a heat insulating plate 1 made of an expanded polystyrene plate (hereinafter referred to as SF). Are attached and laminated, and the tensile strength and rigidity are added to the heat insulating plate 1 by the plastic film 2 to secure the self-sustainability as a mold.

In addition to the floor form in the above invention, the form and heat insulating plate A is disposed on one side of the reinforced concrete frame, thereby ensuring heat insulation of the frame and also serving as a form when concrete is poured. It is used as various molds.

While the thickness of the heat insulating plate 1 is about several tens of mm, that of the plastic film 2 is of the order of several tens of μm, but since the plastic film 2 has a high tensile strength in the elastic range, the out-of-plane bending strength By laminating and integrating the heat insulating plate 1 with no heat, there is a function of greatly increasing the bending strength of the heat insulating plate 1.

Since the plastic film 2 bears a tensile force at the time of loading and at the time of placing concrete when the mold and heat insulating plate A is used as a mold, the heat insulating plate 1 only needs to have a moderate compressive strength. Become.

 Here, the outline of the method for manufacturing the mold and heat insulating plate A will be described.

As a specific example of the plastic film 2, a laminate of a polyester film (hereinafter, referred to as PET) is most preferable in terms of strength.

PET (2) is bonded to the heat insulating plate 1 of SF mainly by heat fusion, etc.
A polystyrene film (hereinafter referred to as PS) 2 'is bonded and laminated with an adhesive.

PET (2) and PS (2 ') bonded together
Thermal lamination is performed with the PS (2 ') side, which has good compatibility with (1), facing the SF (1) side. The heating temperature at this time is about 140 ° C.

In the manner described above, the PS (2 ') is interposed between the PET (2) and the SF (1) as shown in FIG.

The other surface of the heat insulating plate 1 to which the plastic film 2 is not bonded is exposed as it is as a bonding surface with concrete because SF (1) has a property of good adhesion to concrete.

As the plastic film 2, a polyethylene film (hereinafter referred to as PE) may be used.

This adhesion between PE and SF is performed by bonding and laminating PE and polyethylene-vinyl acetate film (hereinafter referred to as EVA) with an adhesive, and then, with the EVA side facing the SF (1) side,
This is done by thermal lamination at about 140 ° C.

Table 1 below shows the results of using six kinds of samples of the formwork and heat-insulating plate A by changing the type of the plastic film 2 and the thickness of the heat-insulating plate (SF) 1 in various ways, and using them at the construction site. It is shown.

The evaluation was performed by assembling the shoring in the space of the actual first floor slab, laying 10 samples of each of the above 6 types on each of them, as shown in Fig. 2, and arranging reinforcement and concrete on this It is based on the result.

As a result of the implementation, for the specimens Nos. 1 to 3 in which PET was laminated, a heat-insulating floor that was no different from the heat-insulating material in which the conventional formwork was arranged could be formed, but Nos. In the case of (1), a phenomenon was observed in which cracks were formed in the heat insulating plate 1 due to walking during the arrangement work, or the cracks were expanded by placing concrete.

In addition, as for the specimen No. 5 which does not use the plastic film 2, since the heat insulating plate 1 was split by walking, the concrete casting was abandoned.

(Effect of the Invention) In claim 1, a plastic film is laminated on one side of the heat insulating plate and a foamed plastic heat insulating plate having the strength and rigidity of the floor form is added to the heat insulating plate. As a result of the elimination of the formwork in the construction method, the formation of openings to the floors and ventilation openings and the work of closing the openings due to the conventional removal work are not required at all, and the construction can be greatly rationalized.

In Claims 2 and 3, since the heat insulating plate is formed by laminating a plastic film having a high compressive strength on one surface of the heat insulating plate, the bending strength and rigidity required at the time of construction are added.
The heat insulating plate can be provided with autonomy as a form, and the form can be completely eliminated at the time of construction.

In addition, since the mold and heat insulating plate of claims 2 and 3 has a structure in which a plastic film is only adhered to one surface of the heat insulating plate, the structure is simple and the production is simple. Since it is formed by lamination, the cutting workability on site is good.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a heat-insulating plate that also serves as a mold, FIG. 2 is a perspective view showing a laying state of the heat-insulating plate, and FIG. 3 is a cross-sectional view thereof. A: Insulating plate that also serves as a mold, 1 ... Insulating plate, 2 ... Plastic film, 2 '... Polystyrene film, 3 ...
Base slab, 4 support, 5 pulling, 6 joist, 7 pier, 8 slab slab, 9 concrete.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 5/32-5/38 E04B 5/43 E04B 1/78-1/80

Claims (4)

(57) [Claims] In a method for constructing an insulated floor constructed by laying a heat insulating material on a lower surface of a first-floor slab of a reinforced concrete structure having an underfloor space, after assembling a support in the underfloor space, a method of forming an insulating plate is performed. A heat-insulating plate that also has a plastic film laminated and integrated on one side is placed on a support with the plastic film side facing down, and reinforcement is placed on this heat-insulating plate that also serves as a form, and concrete is cast. Floor construction method. 2. A heat insulating plate which is disposed on one side of a skeleton of a reinforced concrete structure and serves also as a form when concrete is poured while securing the heat insulating property of the skeleton. And a plastic film is adhered and laminated on one side of the above, and the other side of the heat insulating plate is exposed as it is as a surface for bonding with concrete. 3. The heat-insulating skeleton-building mold according to claim 2, wherein the plastic film is a polyester film, and the polyester film is a polystyrene film as an adhesive, and the polystyrene film is heat-laminated to the heat insulating plate with the polystyrene film facing the heat insulating plate. Insulation board that also serves as a frame. 4. The heat insulating plate for forming a heat insulating frame according to claim 2, wherein the frame is a floor slab.