JPH0723469Y2 - Concrete structure wall structure - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a wall structure of a concrete structure, and more particularly, to a structure having excellent heat insulation and fire protection.

Technical Background of the Invention In recent years, a heat insulating plate has been stretched over the wall of a building from the viewpoint of energy saving in indoor heating and cooling and the prevention of dew condensation on the indoor wall.

In order to stretch such a heat insulating plate on a wall of a building, there are an outer heat insulating structure in which a heat insulating plate is provided outside the room and an inner heat insulating structure in which a heat insulating plate is provided inside the room.

For example, as shown in FIG. 3, the outer heat insulating structure has a heat insulating plate 3 made of foamed plastic or the like on the outside of a body 2 made of a concrete layer in which the reinforcing bars 1 are stretched.
And the exterior material 4 is attached to the outside of the heat insulating plate 3.

In the concrete wall having such a heat insulating structure, since the heat insulating material 3 is made of a combustible material such as foamed plastic, there has been a problem that the outer wall is likely to burn during a fire and spread the fire. Also, to build a wall, rebar 1
There is a case where welding work for joining or cutting the above is performed, but at this time, the fire of the welding work may be scattered on the heat insulating material 3 to melt the heat insulating material 3 or generate a flame.

The object of the present invention is to solve the problems associated with the above-mentioned conventional techniques, and is a concrete structure which is inexpensive, and is excellent not only in heat insulation but also in fire prevention. It is intended to provide a wall structure for.

Outline of the Invention The wall structure of a concrete structure according to the present invention is a concrete structure in which a mortar layer is formed on either or both of an inside and an outside of a frame formed by placing concrete on columns such as reinforcing bars. In the wall structure of (1), the mortar layer is mixed with a quasi-noncombustible material containing an inorganic filler as a main component of vinyl chloride resin or chlorinated vinyl chloride resin, preferably a granular heat insulating material made of foam. It is characterized by having done.

In this way, in the wall structure of the concrete structure according to the present invention, the heat insulating property is not separately provided, but the mortar layer applied to the body is mixed with the granular heat insulating material obtained by finely pulverizing the predetermined material. Since the heat insulating layer can be formed by painting the material, the wall of the concrete structure can be easily and quickly constructed. Moreover, since this granular heat insulating material has heat insulating property and fire preventive property, it can cause fire or spread of fire. The prevention of is also sure.

Detailed Description of the Invention The wall structure of a building according to the present invention will be specifically described below.

FIG. 1 is a sectional view of an essential part showing an embodiment of the wall structure of a concrete building according to the present invention, and the same members as those shown in FIG. 3 are designated by the same reference numerals.

In the wall structure of the concrete structure of the present embodiment, the skeleton 2 made of a concrete layer in which the reinforcing bars 1 and the like are stretched is formed, as in the above-described structure.

A mortar layer 11, which will be described in detail later, is formed on the outer side of the skeleton 2 via an adhesive 10. Then, the glass mesh 12 is attached to the outside of the mortar layer 11, the mortar or resin mortar layer 13 is formed again, and then the exterior material 4 is attached to the outside thereof.

In some cases, the adhesive may not be used as shown in FIG.

In particular, in this embodiment, in forming the mortar layer 11, the mortar is made of a foam containing a vinyl chloride resin or a chlorinated vinyl chloride resin containing an inorganic filler as a main component. Use a material that is a quasi non-combustible material or finely pulverized and is mixed with granular heat insulating material.

In particular, the mortar layer 11 of the present embodiment is mainly composed of a vinyl chloride resin or a chlorinated vinyl chloride resin containing an inorganic filler in cement and sand which are materials constituting a normal mortar layer. A mortar layer 11 is formed by mixing a granular heat insulating material 20 made of a foam material having a semi-incombustibility or higher, and kneading the heat insulating material 20 on the skeleton body 2.

In the present specification, the granular heat insulating material 20 is not particularly limited in its individual shape, and may be, for example, a substantially spherical shape, a rectangular shape, a cubic shape, a flake shape, or a mixture thereof.

Such a granular heat insulating material 20 may include, for example, cutting scraps produced when a quasi non-combustible product or more, preferably a foam product, or a crushed product of the foam is included as an aggregate. The foam product is obtained by first forming a preform made of the above-mentioned material and cutting it into a predetermined shape.
At that time, a large amount of cutting waste and excess heat insulating material are generated. Therefore, it is economical to use the cutting waste and the pulverized material obtained by pulverizing the surplus heat insulating material as the granular heat insulating material because waste of material is eliminated. In this case, the granular heat insulating material 20 is a mixture of granular materials having various shapes such as flakes and substantially spherical shapes, and the granular materials.

The particle size of the granular heat insulating material 20 is not particularly limited, but is preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 7 mm. The mixing ratio with the mortar is preferably 25% for particles having a particle size of 1 and 5 mm, and about 50% for particles having a particle size of 3 mm.

The granular heat insulating material 20 is contained in cement and sand that are materials that form a normal mortar layer, and cement and sand are used against heat from the outside and heat from the inside. In addition to exhibiting heat insulation and fire prevention functions, it is advantageous for indoor air conditioning and heating, and can effectively prevent fire and fire spread.

This granular heat insulating material will be described in more detail.

Quasi-non-combustible or more in the granular heat insulating material 20 means that it is quasi-non-combustible or non-combustible, which are respectively specified in the Ministry of Construction Notification No. 1372 in 1984 and the Ministry of Construction Notification No. 1828 in 1985. In the present invention, as the semi-incombustible or higher material, a granular material made of a resin material, preferably a foam material, whose main component is a vinyl chloride resin containing an inorganic filler or a chlorinated vinyl chloride resin is used.

For example, a heat insulator made of foam has a heat transfer coefficient of 0.04.
kcal / m ・ hr ・ ° C or less, excellent heat insulation, water absorption 0.1 / 100 cm ² or less, excellent water resistance, moisture permeability 0.03 g / m ²・ hr ・ mmHg or less There is also excellent moisture resistance.

In the present invention, a resin material having a vinyl chloride resin containing an inorganic filler or a chlorinated vinyl chloride resin as a main component, preferably a foam, is used as the material having quasi non-combustibility or higher.

The vinyl chloride resin (hereinafter referred to as PVC) used for the quasi-incombustible or more granular heat insulating material 20 is polyvinyl chloride alone or a vinyl chloride copolymer containing 50% by weight or more of vinyl chloride or a chloride thereof. Vinyl-vinyl acetate copolymer, thermoplastic polyurethane, acrylonitrile-butadiene copolymer, chlorinated vinyl chloride resin, chlorinated polyethylene, methacrylic acid ester-acrylic acid ester copolymer, ethylene-vinyl acetate copolymer, vinyl chloride -A mixture of at least one resin having compatibility with polyvinyl chloride such as vinylidene chloride copolymer, wherein the mixture contains 50% by weight or more of polyvinyl chloride.

On the other hand, a chlorinated vinyl chloride resin (hereinafter referred to as CPVC) means not only a resin obtained by chlorinating the PVC but also a blending resin having compatibility with this CPVC, for example, vinyl chloride resin, vinyl chloride-acetic acid. Vinyl copolymer, thermoplastic polyurethane, acrylonitrile-butadiene copolymer, chlorinated polyethylene, methacrylic acid ester-acrylic acid ester copolymer, ethylene-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, etc. Among them, it is a concept including a mixture with at least one kind or more and the amount of the blending resin in the mixture is 50% by weight or less.

As the chlorinated vinyl chloride resin, as described above
In addition to PVC, a copolymer containing 50% by weight or more of a vinyl chloride resin can be used. The chlorination method may be any conventionally known method, for example, a photochlorination method under irradiation of ultraviolet rays is preferably used.

Examples of inorganic fillers include inorganic fibrous substances and inorganic granular substances.

Among them, the inorganic fibrous material has a good volume retention effect when exposed to high temperature.

It is presumed that this is because the inorganic fibrous substances are entangled with each other in the foam to form a network, and thus have excellent shape plan stability.

As the inorganic fibrous material, asbestos or glass fiber having an average fiber length of 1 μm or more, preferably about 10 μm to 50 mm,
Rock wool, glass fiber, ceramic fiber, alumina fiber, carbon fiber, quartz fiber, boron fiber, various metal fibers,
Various whiskers and the like can be mentioned, and these fibers can be used alone or in admixture of two or more. However, when the granular material of the foam is used, rock wool is most preferable from the viewpoint of ease of foam molding, various characteristics of the foam to be obtained, cost and the like. The average particle size of the inorganic particles is 0.01 to 30.
Talc, calcium carbonate, aluminum hydroxide, magnesium hydroxide, zinc oxide, mica, bentonite, clay, silica and the like having a thickness of 0 μm, preferably about 0.1 to 100 μm are suitable.

Further, a hollow body such as shirasu balloon can be used as the inorganic particulate material.

This inorganic filler may be used alone or in combination of two or more.

The content of such an inorganic filler can be determined in consideration of the amount to be contained in the resin material and the expansion ratio when the resin material is foamed, the cost, etc., but usually with respect to 100 parts by weight of PVC and / or CPVC. It is desirable that the inorganic fiber content is 2 parts by weight or more, preferably 5 parts by weight or more, more preferably 10 parts by weight or more. The amount of inorganic particles is 198 parts by weight or more, preferably 300 parts by weight or more.
As the content of the inorganic filler is increased, the obtained granular heat insulating material approaches from non-combustible to non-combustible.

The PVC foam or CPVC foam used as the material constituting the semi-incombustible or higher granular heat insulating material of the present invention contains a large amount of rock wool or the like, which has no particular problem in hygiene, by using a specific solvent. It can be produced by the method disclosed in the international application PCT / JP89 / 00362 specification or the application disclosed in JP-A-63-264645, which is an application of the same applicant capable of high foaming.

The expansion ratio of these foams containing an inorganic filler is preferably 50 times or more, and when considering the calorific value at the time of combustion, the amount of smoke generation and the economical efficiency, a foam having a higher expansion ratio is used. It is desirable to be 60 times or more,
More preferably, it is 80 times or more. However, if the expansion ratio exceeds 200 times, it is difficult to produce a normal foam, and even if a good foam is obtained, physical properties such as strength will be insufficient, so 200 times or less. Is preferred.

Foam as a material constituting such a quasi-noncombustible granular heat insulating material 20, thermal conductivity, compressive strength, water absorption, in comparison with the wool wool cement board or glass wool and the like in terms of workability. It has excellent performance and exhibits excellent functions in heat insulation and fire resistance.

In the wall structure formed by the mortar layer 11 including the granular heat insulating material 20 as described above, since the mortar layer 11 has the heat insulating property and the fire preventive property, the spark generated when welding the reinforcing bar 1 is caused. There is no risk that the granular heat insulating material 20 will melt or burn, and the welding operation can be easily performed.
Moreover, since this granular heat insulating material 20 is both a non-combustible material and a heat insulating material, it cooperates with the mortar layer 11 to block thermal exchanges indoors and outdoors, and exerts heat insulation performance and fire prevention performance. become. In particular, since the wall of the heat insulating structure can be formed only by coating the mortar 3 on the skeleton 3, the cost is advantageous and the construction is also easy.

The present invention is not limited to the above-described embodiments, and although not shown, the granular heat insulating material 20 may be mixed in the mortar layer of the inner heat insulating structure, and both inside and outside the body. You may form a mortar layer.

As described above, according to the present invention, the heat insulating material is not provided separately, but if the mortar layer applied to the body is mixed with the granular heat insulating material made of a predetermined material, the heat insulating layer is applied. It is possible to form a heat insulating wall of a concrete structure which can be easily and quickly constructed and is inexpensive. Moreover, since this granular heat insulating material has heat insulating properties and fireproof properties, it is possible to reliably prevent fire or spread of fire.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of an essential part of a wall structure according to the present invention, FIG. 2 is a sectional view of an essential part of another embodiment of the present invention, and FIG.
It is a principal part sectional view which shows the conventional wall structure. 1 ... Reinforcing bar, 2 ... Skeleton, 11 ... Mortar layer, 20 ... Granular heat insulating material.

Claims (1)

[Scope of utility model registration request] 1. A mortar layer is formed on either or both of the inside and the outside of a frame formed by casting concrete on a pillar such as a reinforcing bar, and the mortar layer contains a chloride containing an inorganic filler. A wall structure of a concrete structure, characterized in that a granular heat insulating material composed of a vinyl-based resin or a chlorinated vinyl chloride-based resin as a main component and having a semi-incombustible or higher quality is mixed.