JPH03208944A - Constructing method for floor and combination form and heat insulating plate - Google Patents

Abstract

PURPOSE:To sharply rationalize execution of a work by a method wherein a timbering is assembled in an underfloor space, and heat insulating plates on the one surface of which a plastic film is mounted are placed on the timbering to place concrete. CONSTITUTION:A plastic film 2 is mounted on the one surface of a heat insulating plate 1 for lamination to form a combination form and heat insulating plate A. A support 4 is erected on a foundation slab, and sleepers 5, floor joists 6, and sash bars 7 are spanned therebetween. The combination form and heat insulating plates A are laid on a timbering, and slab reinforcing bars are arranged thereon to place concrete. This method completely eliminates the need for forms.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention provides the following features in the construction of reinforced concrete structures:
Using a heat insulating board that also serves as formwork when pouring concrete 1.
The present invention relates to a floor construction method for constructing a floor slab for a floor, and, as an example, a heat insulating board that also serves as a formwork and is applied to this construction method.

(Prior Art and Problems to be Solved by the Invention) In reinforced concrete structures such as apartment complexes where an underfloor space for ventilation is formed under the first floor slab, the construction of the first floor slab has traditionally been Support on the slab. Generally, this is done by assembling shoring such as joists and floor joists, laying a floor form on top of it, and placing insulation material on top of it, followed by reinforcing and pouring concrete.

With this construction method, it is necessary to remove the floor formwork after the concrete has hardened, but the floor formwork of l units usually has a certain size and it is almost impossible to remove it from the underfloor ventilation opening. Conventionally, when concrete is poured, an opening corresponding to the width of the formwork is prepared in the floor surface, and after the formwork is removed, the opening is covered with concrete, and the formwork is removed.

Although it is possible to carry out the work through the ventilation opening under the floor, since the size is larger than necessary, construction work will be required to close off the extra opening in the same way as with the floor.

This invention was made in light of this background, and aims to propose a new type of formwork that saves the trouble of removing it, and a method of constructing a floor using the formwork.

(Means for Solving the Problems) In the present invention, a foamed plastic insulation board in which a plastic film is laminated on one side of the insulation board is used for the floor formwork, and the plastic film is used to handle the load during construction and the concrete placement. By bearing the tensile force due to pressure and ensuring the out-of-plane rigidity of the insulation board by the tension of the Plastinok film, the insulation board integrated with the Blastinok film can also be used as a formwork, and the formwork during construction. To eliminate the need for the above-mentioned conventional problems caused by using formwork.

To construct the floor, place the above-mentioned heat insulating board, which also serves as the formwork, on the shoring assembled in the underfloor space with its plastic film side facing down, place reinforcement on top of this, and pour concrete. This is done by setting

A heat insulating board that also serves as a formwork is formed by laminating a plastic film such as a polyester film with high tensile strength on the entire surface of a heat insulating board made of expanded polystyrene board.

(Example) The present invention will be explained below based on the drawings showing one embodiment.

First, the invention described in the first claim will be explained.

This invention is a method of constructing a first floor floor slab as a heat insulating floor by using a formwork-cum-insulating board A, which is laminated by pasting a plastic film 2 with high tensile strength on one side of a heat insulating board 1, as a floor form. be.

The formwork-cum-insulating board A has the function of a formwork by integrating the plastic film 2, and is placed on the shoring with the plastic film 2 in charge of tension facing downward.

The tension of the plastic film 2 located on the lower side bears the tensile force due to the load during reinforcing work or concrete pouring, and at the same time maintains the form of the heat insulating board 1.

As shown in Figures 2 and 3, the construction is carried out in the conventional manner by erecting supports 4 on the foundation slab 3 at appropriate intervals, and on top of these supports 4 are installed.
After erecting the joist 6 and the crosspiece 7 on the main drawer 5, and laying the formwork-cum-insulating board A on the joist 6 and the crosspiece 7,
This is carried out by arranging slab reinforcements 8 and pouring concrete 9.

As mentioned above, the formwork-cum-insulating board A serves both as a formwork and at the same time serves as a disposable formwork, so there is no need to separately install a formwork, and there is no need to remove it after the concrete 9 has hardened.

Therefore, there is no need to provide an opening on the floor surface for carrying out the formwork, and there is no need to block this opening.

Therefore, after the concrete 9 has hardened, it is possible to proceed to the construction of the upper floor.

Next, the invention described in the second claim will be explained.

The formwork-cum-insulating board A of this invention is shown in the first part, which is slightly exaggerated.
As shown in the figure, a foamed polystyrene plate (hereinafter referred to as SF)
A plastic film 2 is pasted and laminated over the entire surface of a heat insulating board 1 made of
This ensures its independence as a formwork.

This formwork-cum-insulating board A is used not only as a floor formwork in the above invention but also as various types of formworks.

The thickness of the insulation board 1 is on the order of several tens of plates, while that of the plastic film 2 is on the order of several tens of micrometers, but since it has high tensile strength in the elastic range, it is a insulation board with no out-of-plane bending strength. By laminating and integrating the heat insulating plates 1 and 1, the bending strength of the heat insulating plates 1 is greatly increased.

This plastic film 2 bears tensile force during loading and concrete pouring when the formwork-cum-insulating board A is used as a formwork.

As a result of the second result, it is sufficient for the thermal insulation material to have an appropriate compressive strength.

Here, we will explain the process for manufacturing the heat insulating board 8 which also serves as a formwork.

As a specific example of Plus Sennoku Film 2, a laminate of polyester film (hereinafter referred to as PUT) is most preferable from the viewpoint of strength.

PET (2) is bonded to the SF insulation board l mainly by heat fusion, etc., but prior to that, PET (2)
First, a polystyrene film (hereinafter referred to as PS) 2"
are bonded and laminated with adhesive.

and PET (2) and PS (2“
) is SF (1) and PS (2'), which has good adhesion compatibility.
) side facing the SF(1) side. The heating temperature at this time is about 140°C.

In the above manner, as shown in FIG. 1, PET (2) and SF (1) are bonded and laminated into one piece with PS (2'') interposed between them.

As the plastic film 2, it is also possible to use a polyethylene film (hereinafter referred to as PE).

This bonding between PE and SF is performed by bonding and laminating PE and polyethylene-vinyl acetate film (hereinafter referred to as Eν^) with an adhesive, and then placing them together with the EVA side facing the SF (1) side for approximately 140 minutes. This is done by thermal lamination at C.

Table 1 below shows the results of 6 types of samples of insulation IA that can be used as formwork by varying the type of plastic film 2 and the thickness of insulation board (SF) 1, and using these at the construction site. It is something that

Table 1 Evaluation was carried out by assembling shoring in the actual first floor slab space.
As shown in FIG. 2, 10 sheets of each of the six types of samples described above were laid on top of this, and reinforcement and concrete were placed on top of this.

As a result of the implementation, No. For specimens 1 to 3, we were able to create an insulating floor that was the same as a conventional insulation material with formwork, but with N without bonding PET.
o. In the case of 4.6, cracks were observed in the insulation board 1 due to walking during reinforcing work, or cracks were enlarged due to concrete pouring.

Also, No. 2 does not use plastic film 2. Regarding specimen No. 5, the insulation board l split due to walking, so
This resulted in the abandonment of concrete pouring.

(Effects of the Invention) This invention is as described above, and as a result of the floor construction method of the invention described in the first claim eliminating the need for formwork, as described above,
There is no need to create openings to the floor or ventilation openings or to close them, which is required in conventional removal work, making it possible to significantly streamline the construction process.

In the invention as claimed in claim 2, a plastic film with high compressive strength is laminated on one side of the heat insulating board to add bending strength and rigidity necessary for construction, so the formwork is not attached to the heat insulating board. It can be made to stand on its own, and formwork can be completely eliminated during construction.

Furthermore, since this heat insulating board that also serves as a formwork is formed by laminating a foamed plastic board and a plastic film, it is easy to cut on site.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing a heat insulating board that also serves as a formwork, FIG. 2 is a perspective view showing how the heat insulating board is installed, and FIG. 3 is a sectional view thereof. A...Insulation board for formwork, 1...Insulation board, 2...Plastic film, 2'...
...Boristyrene film, 3...Foundation slab, 4...Support, 5...Drawing, 6...Joist, 7... ...Slab, 8...Slab reinforcement, 9...Concrete. Figure 1 Figure 2

Claims (3)

[Claims] (1) 1 of reinforced concrete structure with underfloor space
In the method of constructing a heat insulating floor, which consists of laying heat insulating material on the underside of a floor slab, after assembling the shoring in the underfloor space, a heat insulating board that also serves as a formwork, with a plastic film laminated and integrated on one side of the heat insulating board, is installed. , a floor construction method characterized by placing the plastic film side facing down on shoring, arranging reinforcement on the formwork-cum-insulating board, and pouring concrete. (2) A heat insulating board that doubles as a formwork and is made by laminating a plastic film on one side of a heat insulating board made of expanded polystyrene. (3) The heat insulating board that also serves as a formwork according to claim 2, wherein the plastic film is a polyester film.