JPS5933745B2 - Insulation materials and construction methods for concrete buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating material made of a thick plate-shaped synthetic resin foam for constructing concrete buildings, and a heat insulating material having a plurality of engaging pieces affixed to one side of the synthetic resin foam. , and a method of constructing a concrete building in which the side of the heat insulating material to which the engaging piece is attached is directly stretched to the concrete surface.

Conventionally, the method of constructing a building in which insulation material made of expanded polystyrene or expanded polyethylene is directly attached to a concrete surface is to construct a concrete structure using the conventional method and then adhere the insulation material to the concrete surface. Method: Before pouring concrete, place the insulation material on the formwork if it is a ceiling surface, temporarily attach it to the formwork if it is a wall surface, and then pour the concrete and let it harden. There was a way to get a concrete structure with cladding.

However, with the former, the installation cost is high due to the complicated work of gluing the insulation material and the expensive adhesive.
Another drawback is that there is no good adhesive that can withstand the alkali of concrete, and the adhesive strength tends to deteriorate over time.

Furthermore, although the latter method is easy and inexpensive to construct, the bond between the insulation material obtained by this method and the concrete is extremely weak, so the insulation material (especially when installed on the ceiling) may fall off. It has the disadvantage of being easy.

In particular, in the case of a heat insulating material that has a skin layer on its surface to provide good heat insulation, the surface is smooth, so it is hardly fixed using this method.

Furthermore, in Japanese Patent Publication No. 53-45606, mortar is filled into the lattice-shaped grooves of a heat insulating material in which lattice-shaped grooves are formed in a shape capable of exhibiting a wedge action, and lap joints are formed at the ends of the four circumferences. A method is described for attaching the insulation material to the building frame through this mortar layer, but this method requires advanced in-mold molding or thick plate cutting because the insulation material used has a complicated shape. It is extremely expensive because it has to be manufactured using a method, and has the disadvantage of increasing construction costs.

The present invention was completed as a result of repeated research aimed at eliminating the drawbacks of the conventional method as described above.
The present invention relates to a heat insulating material having a shape suitable for firmly bonding concrete and a heat insulating material without losing the advantages of the heat insulating material, and an improved construction method using the heat insulating material.

That is, the present invention provides a plurality of truncated cone-shaped or truncated pyramid-shaped engagement pieces made of non-foamed synthetic resin or wood on one side of a thick plate-shaped synthetic resin foam insulation material, and a plurality of truncated cone-shaped or truncated pyramid-shaped engagement pieces made of non-foamed synthetic resin or wood. A synthetic resin foam insulation material for concrete pouring construction whose bottom surface (smaller bottom surface) is pasted as an adhesive surface, and a heat insulation material made of the above synthetic resin foam, and pasting of the engaging piece of the insulation material. Place the other surface (flat surface) that is not attached on the formwork or temporarily fix it, and apply concrete v to the surface on which the engaging piece is pasted.
In relation to a method for constructing a concrete building with a heat insulating material, which is characterized by pouring, an engaging piece is embedded in the hardened concrete, and the concrete and the heat insulating material are firmly joined. This is what we provide.

The present invention will be described below with reference to the drawings.

FIGS. 1 and 2 respectively show typical examples of the shape of the engaging piece attached to one side of the heat insulating material made of the synthetic resin foam of the present invention.

In the case of a truncated pyramid shape, it goes without saying that it is not limited to a hexagonal truncated pyramid shape as shown in FIG. 2, and may be any polygonal truncated pyramid shape such as a four sided pyramid shape.

In both cases of a truncated cone shape and a truncated pyramid shape, the upper base surface S1 of the two bottom surfaces S1 and S2 becomes the adhesive surface to the heat insulating material.

The height h of the stand must also be smaller than the thickness of the concrete layer to be cast on the heat insulating stand to which the engaging piece will be bonded, but it is usually within this range and may be between 2 and 6 crrL. Bye.

The engagement piece is made of synthetic resin or wood that can be easily bonded to the heat insulating material and has sufficient strength.

Although the same functionality can be obtained by using a foam that is the same as or similar to the heat insulating material, it is somewhat unreliable in terms of strength and is prone to looseness due to compressive deformation.

Further, the retaining piece may be hollow, or the lower bottom surface side may be partially recessed, as in the example shown in FIG. 3 (center sectional view).

Further, as in the examples shown in FIGS. 4 and 5, some portions may be columnar.

Also, since pasting a large number of engaging pieces will affect the strength of the concrete layer, they are pasted on a portion corresponding to 5 to 10% of the surface area of the insulation material, and the pasting points are offset to one part. (It is preferable to provide it over the entire surface as much as possible.)

For example, when five engaging pieces are attached, as shown in FIG. 6, they are distributed and attached to the ends and the center of the heat insulating material.

FIG. 7 is a sectional view taken along the line AA in FIG. 6.

Next, a method of constructing a concrete building using the heat insulating material of the present invention will be described with reference to the drawings, using an example in which the example shown in FIGS. 6 and 7 is stretched on the ceiling surface of a concrete building.

As shown in FIG. 8, a heat insulating material is placed on the formwork 3 for forming the ceiling surface, and reinforcing bars (not shown) are placed at appropriate locations on the side where the engaging pieces 2 of the heat insulating material are provided. ).

Next, concrete is poured on the side where the engaging piece of the heat insulating material is pasted, and after the concrete has hardened, the formwork 3 is removed.

A longitudinal sectional view of this state is shown in FIG. Note that 4 is hardened concrete.

According to the method of the present invention, the engagement piece provided on the heat insulating material is
The engagement piece is embedded in hardened concrete, and the engagement piece acts like an anchor to firmly fix the concrete layer and the heat insulating material.

Therefore, even when using a heat insulating material with a smooth surface that is hardly expected to adhere to concrete, there is no risk of it falling off over a long period of time.

In the above, a method of construction using a heat insulating material to which a retaining piece is attached in advance has been described, but the construction can also be performed by the following method other than this.

That is, a heat insulating material made of synthetic resin foam to which no engaging pieces are pasted is placed on the formwork for forming the ceiling surface, and engaging pieces are placed on this at appropriate locations (as described above, the heat insulating material is 5 of surface area
〜IO%).

Note that the reinforcing bars may be placed either after or before the engagement piece is pasted.

Next, concrete is poured in the same manner as in the previous case, and after the concrete has hardened, the formwork is removed.

This method also uses a concrete layer and insulation as described above:
The material is firmly fixed.

Examples of the synthetic resin constituting the heat insulating material made of thick plate-shaped synthetic resin foam in the present invention include polystyrene,
Examples include styrene-acrylonitrile copolymers, styrene-acrylic acid ester copolymers, styrene or styrene copolymers such as ABS resins, polyolefins such as polyethylene and polypropylene, and mixtures thereof.

Further, although both extruded foam and bead method foam can be used as the foam, extruded foam is often used.

Further, the expansion ratio of the foam may vary depending on the purpose, but in general, a ratio of about 10 to 40 times is commonly used.

Various adhesives can be used to attach the engaging pieces constituting the heat insulating material of the present invention. For example, when the heat insulating material is polystyrene foam, vinyl acetate emulsion, recycled Rubber 2-based gasoline-containing formulations are preferably used.

As described above, the present invention has made it possible to construct a concrete building in which insulation boards are reliably installed extremely easily and inexpensively, and has improved insulation and energy saving technology for buildings, various storage tanks, etc. It is a great contribution to the

[Brief explanation of drawings]

1 to 5 show an example of the engagement piece in the heat insulating material of the present invention. FIG. 6 is a plan view showing an example of the heat insulating material of the present invention, and FIG. 7 is a cross-sectional view taken along line A-Am in FIG. 8 and 9 are explanatory diagrams of the construction method according to the present invention. 1: Synthetic resin foam, 2: Engagement piece, 32 formwork, 4: Concrete.

Claims (1)

[Scope of Claims] 1. A plurality of truncated cone-shaped or truncated pyramid-shaped engagement pieces made of non-foamed synthetic resin or wood are provided on one side of a thick plate-shaped synthetic foam insulation material, and a plurality of truncated cone-shaped or truncated pyramid-shaped engagement pieces are provided on one side of the thick plate-shaped synthetic foam insulation material. A thermal insulation material for concrete buildings that is attached with the bottom surface as the adhesive surface. 2. The heat insulating material according to claim 1, wherein an engaging single edge is provided in a portion corresponding to 5 to 10% of the surface area of the heat insulating material. 3. The heat insulating material according to claim 1, wherein the engaging piece has a height of 2 to 6 cm. 4. The heat insulating material according to claim 1, 2, or 3, wherein the engaging piece has a truncated cone or truncated pyramid shape as a whole, but partially has a cylindrical or prismatic shape. 5. The heat insulating material according to claim 1, wherein the thick plate-shaped synthetic resin foam insulating material is an extruded polyethylene foam. 6 A plurality of truncated cone-shaped or truncated pyramid-shaped engaging pieces made of non-foamed synthetic resin or wood are placed on one side of a thick plate-shaped synthetic resin foam insulation material, and the upper bottom surface of the engaging pieces is used as the adhesive surface. The attached synthetic resin foam heat insulating material is placed on a formwork with the other surface (flat surface) on which the engaging piece is not attached, or temporarily fixed to the formwork. A method for constructing a concrete building covered with heat insulating material, characterized by pouring concrete on the surface to which the joint pieces are attached.