JPH05868A - Porous body and aggregated structure thereform - Google Patents

Abstract

PURPOSE:To obtain aggregated structures having excellent heat insulating property, capable of being freely regulated to moderate weight, suitable for use as a substitute for many pieces of ballast laid on the roof and also usable as the wall or floor material of a building, a sound insulating material for a freeway or a paving material laid on a sidewalk. CONSTITUTION:A coating layer 15 of polyethylene is formed on porous granular ceramics 12 so as to coat the entire outer surface 14 of the ceramics 12. The resulting porous bodies 22 of 6mm diameter and porous bodies 24 of 2mm diameter are aggregated to obtain a panel-shaped aggregated structure 26 of 13.5cm length, 18.5 cm width and 3cm thickness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a porous body and an aggregate structure using the porous body.

[0002]

2. Description of the Related Art Conventionally, for example, for heat insulation of a rooftop of a building, regardless of whether it is a concrete structure or a steel frame structure, first, a synthetic resin foam is molded on a rooftop slab. The heat insulating material thus obtained was laid, concrete was cast on the heat insulating material to fix the heat insulating material, and the waterproof sheet was laid on the concrete. Since this waterproof sheet is weak and easily deteriorated by rain wind or solar heat, a ball (cobblestone) was laid on the waterproof sheet. Thus, the waterproof sheet is protected by the ballast and is not directly exposed to rain wind or solar heat. However, today, not only are ballasts very expensive, but they tend to be out of stock, making it difficult to obtain them. There is also a problem that the ballast is scattered by a strong wind.

There is also a method of placing concrete in place of the above-mentioned ballast, but in this case, even if the waterproof sheet is broken and rain leaks occur in the room, it is necessary to repair or re-install the waterproof sheet. It was impossible or possible but not easy.

The present invention has been made in view of the above circumstances, and an object thereof is not only a structure as a substitute for a ballast that can solve the above problems but also other fields. It is an object of the present invention to provide a structure which can be widely and suitably used, and which has excellent heat insulating properties, and a porous body which constitutes this structure.

[0005]

According to a first aspect of the present invention, there is provided a porous body in which a porous granular material made of an inorganic material is provided with a coating layer which covers the entire outer surface of the porous granular material. is there.

According to a second aspect of the present invention, there is provided an aggregate structure in which a large number of the porous bodies described in the preceding paragraph are aggregated and molded into a desired shape.

As the above-mentioned inorganic material, conventionally known materials can be used, and specific examples thereof include minerals such as diatomaceous earth, zeolite, pearlite perlite and sepiolite, ceramics obtained by firing these, artificial or Examples include new ceramics made from synthetic raw materials.

The size of the porous body is such that the particle size is 1 to 15 m.
m is preferable in terms of handling, but it is not particularly limited.

The material of the coating layer provided on the porous granules is not particularly limited, and examples thereof include various cements; vinyl acetate type, polyethylene type, acrylic type, vinylidene chloride type,
Emulsion of synthetic rubber (SBR etc.) type, latex type etc .; pitch, tar or urethane thereof,
Epoxy and phenol modified products; inorganic substances such as water glass and gypsum; thermoplastic resins such as polyethylene, polypropylene, polystyrene, vinyl chloride resin, acrylic resin, fluororesin and polyamide resin (these are used industrial waste May be reused.); Thermosetting resins such as phenol resin, polyester resin, urea resin, melamine resin, and epoxy resin may be used. Among the above, use of cement is particularly preferable because a porous body having excellent fire resistance can be obtained. Also,
If necessary, various additives such as a light stabilizer, an ozone deterioration inhibitor, and a pigment may be appropriately added to the above substances.

The coating method includes, but is not limited to, a method of spraying, a method of applying with a brush, an emulsion polymerization method, a method of soaking in a solution for a predetermined time, and the like.

As a method of gathering a large number of porous bodies,
A binder may or may not be used. Examples of the binder include the same material as the material of the coating layer provided on the porous granules.

As a gathering method without using a binder, a large number of porous bodies are assembled when the coating layer provided on the porous body is still in a molten state, and the coating layer is cured under this state to obtain a large number of layers. A method of gathering porous bodies, for example,
If the material of the coating layer provided on the porous body is a thermoplastic material, a method of heating the porous body to melt the coating layer again and consolidating a large number of porous bodies under this state can be mentioned.

A large number of porous bodies are aggregated and molded into a panel-shaped, block-shaped, plate-shaped, etc. aggregated structure. It can be used for timber and floor material for laying on the sidewalk. A paint may be applied to the surface of the aggregate structure to form a coating film. By doing so, it is possible to obtain an aggregate structure in which the voids formed between one porous body and another adjacent porous body are retained, and thus this aggregate structure is used as a heat insulating material. It is preferable when it is used because it is more convenient and the coating film can prevent water and the like from entering the inside of the aggregate structure.

[0014]

In the porous body of the present invention, the coating layer provided on the entire outer surface of the porous body holds the innumerable pores in the inside as voids which are closed, and there is a concern that the voids become clogged with dust or the like. There is no.

Therefore, the aggregate structure obtained by assembling the above-mentioned porous bodies has excellent heat resistance and can exhibit a heat insulating effect. Also, if a large number of this aggregated structure is laid on a waterproof sheet on a rooftop, for example, it will be a protective material for the waterproof sheet, and can be suitably used as a substitute for the ballast laid on the waterproof sheet in the past. obtain.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

Embodiment of Claim 1 FIG. 1 shows a porous body 10 in which a coating layer 16 is provided on the entire outer surface 14 of a granular ceramic 12.

The granular ceramics 12 has a hole diameter of 1 /
It is obtained by granulating diatomaceous earth having a large number of micropores of 1,000 to 1 / 10,000 mm and then calcining it at 1,000 ° C. In the granular ceramics 12 thus obtained, 70% of the volume of the particles becomes pores.

The general characteristics of the granular ceramics 12 used in this embodiment are as follows. (Chemical composition) SiO ₂ 78% Al ₂ O ₃ 12% Fe ₂ O ₃ 5% R ₂ O (alkali) 1% (filled bulk density) 0.53 ton / m ³ ● The entire outer surface of the granular ceramic 12 is As described above, the coating layer 16 is provided. The coating layer 16 is made of polyethylene, which is a thermoplastic resin, and is obtained by spraying the resin in a molten state on the entire outer surface of the granular ceramic 12 and then curing the resin.

The porous body 10 having the above structure has a large number of fine voids 18 therein, and there is no fear that fine dust or the like will enter the inside of the fine voids 18 by the coating layer 16 and clog the fine voids. .

Example of Claim 2 400 g of the porous body (average particle size 6 mm) 22 in the above example and 1 of the same porous body (average particle size 2 mm) 24
00 g is mixed so as to be almost uniform, and the mixed porous body is heated to melt the coating layer again. Then, under this condition, a large number of porous bodies 22 and 24 are collected,
The coating layer is cured. In this way, the vertical 13.5
A panel-shaped aggregate structure 26 having a size of cm, a width of 18.5 cm, and a thickness of 5 cm was obtained. A green paint was applied to the aggregate structure 26 to form a coating film 28 on the surface of the aggregate structure 26. A partially enlarged cross-sectional view of this concentrating structure 26 is shown in FIG.

A large number of the aggregated structures 26 thus obtained are manufactured, and these aggregated structures 26 are laid side by side vertically and horizontally fixed as a wall material of a house, for example. It can also be laid out at a predetermined position on the rooftop that has been waterproofed. As a result, heat treatment and heat insulation treatment can be applied to the location where the aggregate structure 26 is used.

In the above-mentioned embodiment, the aggregate structure is formed by aggregating the porous bodies having different particle diameters. However, the present invention is not limited to this, and only the porous bodies having the same particle diameter may be aggregated.
It is also possible to use three or more types of porous bodies having different particle sizes.

Further, the aggregated structure may be molded by using only porous bodies having the same general characteristics such as chemical composition, or several kinds of porous bodies having different general characteristics may be aggregated.

One porous body in the aggregate structure is
It does not have to be necessarily in contact with other nearby porous bodies, and a certain porous body may exist without being in contact with any of the porous bodies. All the porous bodies may be aggregated with a binder without contacting each other.

[0026]

INDUSTRIAL APPLICABILITY In the porous body of the present invention, the coating layer provided on the entire outer surface of the porous body holds innumerable pores inside as voids, and there is no concern that the voids become clogged. Therefore, the aggregated structure obtained by assembling such porous bodies has excellent heat resistance and can exhibit a heat insulating effect. In addition, it is easy to set a suitable weight such that the aggregate structure is neither too heavy nor too light. For example, in the conventional rooftop, a large number of ballasts are laid out on a waterproof sheet. It is also suitable for use as a substitute for other materials such as wall materials in buildings, floor materials,
Alternatively, it can be used as a soundproofing material for expressways and a flooring material for laying on sidewalks.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a porous body showing an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a concentrating structure showing an embodiment of the present invention.

[Explanation of symbols]

10, 22, 24 ... Porous body 12 ... Granular ceramics 14 ... Entire outer surface 16 ... Coating layer 26 ... Consolidation structure

Claims (2)

[Claims] 1. A porous body comprising a porous granular body made of an inorganic material and a coating layer covering the entire outer surface of the porous granular body. 2. An aggregate structure comprising a large number of the porous bodies according to claim 1 assembled together and molded into a desired shape.