JPH11141008A - Structure of soundproof wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recycle coal ash by laminating sound insulating material and sound absorbing material, and using coal ash mixed cement for both the sound insulating material and sound absorbing material. SOLUTION: Coal ash mixed cement and alkaline-resistive glass fiber are kneaded with water and sand and formed in panel shape with the end face bent in U-shape to form sound insulating material 2. Sound absorbing material 3 is a panel-like molding made of a rigid porous body mainly composed of a cellular cement hardened body. The sound absorbing material 3 is laminated in close contact with the sound insulting material 2 from the bent side, and its end face is covered with the bent part of the sound insulating material 2. Cushioning material 4 made of urethane foam is laid between the bent part of the sound insulating material 2 and the sound absorbing material 3. Coal ash is mixed in cement and the cement hardened body. The previously formed sound absorbing material 3 is arranged in a specified position in a form shaped corresponding to the sound insulating material 2, and a kneaded product of coal ash mixed cement and other components is poured in the form. After curing and mold releasing, the sound absorbing material 3 is fixed to manufacture a structure body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof wall structure used for an outer wall of a boiler of a thermal power plant, for example.

[0002]

2. Description of the Related Art Soundproof walls are used on the outer wall of a boiler such as a thermal power plant to prevent noise generated from the boiler. Conventionally, such a soundproof wall has a structure (a soundproof wall structure) in which a sound absorbing material such as glass wool is laminated on a sound insulating material made of, for example, a panel-shaped GRC (glass fiber reinforced concrete). ) Is used. The soundproof wall is constructed by covering the periphery of the building in which the boiler is stored with the structure with the laminated side of the sound absorbing material inside.

[0003]

By the way, especially in a thermal power plant using coal as fuel, coal ash is generated by burning coal. Conventionally, this coal ash has been discarded. However, since it is becoming difficult to secure a disposal place, its disposal has become a problem. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for recycling coal ash which has been conventionally dumped.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a sound insulating wall structure comprising a sound insulating material and a sound absorbing material laminated on each other. In particular, coal ash is mixed into both the sound insulating material and the sound absorbing material. It is characterized by the fact that cement is used.

Here, it is desirable that the mixing ratio of the coal ash to the cement is 10% or more and 50% or less.

[0006] It is preferable that the sound insulating material is made of cement mixed with the coal ash, and the sound absorbing material is formed of a hardened cement containing air mixed with the coal ash.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of the structure of the structure 1 according to the present invention. Reference numeral 2 denotes a sound insulating material.
Is obtained by kneading cement mixed with coal ash and alkali-resistant glass fiber together with water and sand, and forming the panel into a U-shaped panel.

Reference numeral 3 denotes a sound-absorbing material. The sound-absorbing material 3 is a panel-shaped molded product made of a rigid porous body mainly composed of an aerated cement hardened body (with or without a reinforcing bar), and is bent to the sound insulating material 2. The sound-insulating material 2 is bent from the side, and its end face is covered from the periphery by the bent portion of the sound insulating material 2. Further, a cushion material made of urethane foam is laid between the bent portion of the sound insulating material 2 and the sound absorbing material 3 as indicated by reference numeral 4 in the drawing.

[0009] Further, coal ash is mixed in the cement and the cement hardened body with bubbles. In this case, in order to promote the reuse of coal ash, it is desirable that the mixing ratio of coal ash into cement be 10% or more, and in order to ensure the strength of the structure 1, the mixing ratio is 50% or less. It is desirable to do.

In this structure 1, a preformed sound absorbing material 3 is disposed at a predetermined position in a mold (not shown) having a shape corresponding to the sound insulating material 2, and coal ash is formed in the mold. After pouring the kneaded product of the mixed cement and other components, curing and releasing,
It is manufactured by fixing the sound absorbing material 3. Further, when constructing the soundproof wall, similarly to the conventional structure, the surroundings of the building in which the boiler is stored may be covered with the structure 1 with the laminated side of the sound absorbing material 3 inside.

According to the structure 1, by mixing the coal ash into both the sound insulating material 2 and the sound absorbing material 3, it is possible to reuse the coal ash conventionally discarded. As a result, the coal ash is discarded. The amount is reduced. Further, since the coal ash whose cost is extremely low is used as a part of the raw material, the price of the structure 1 is reduced. Further, due to the water absorbing property of the sound absorbing material 3, when manufacturing the structure 1, the moisture of the sound insulating material 2 is absorbed by the sound absorbing material 3, and there is also an effect that the drying time of the sound insulating material 2 is shortened. On the other hand, when manufacturing the structure 1, a mesh or the like may be laid inside the sound insulating material 2 and / or the sound absorbing material 3 to take measures to prevent the structure 1 from scattering.

[0012]

As described above, according to the sound-insulating wall structure of the present invention, by mixing coal ash into both the sound insulating material and the sound absorbing material, it is possible to reuse the coal ash conventionally discarded. Possible, resulting in reduced coal ash waste.
In addition, the use of coal ash, which has a very low cost, as a part of the raw material reduces the cost of the structure.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of the structure of a soundproof wall structure according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sound insulation wall structure (structure) 2 Sound insulation material 3 Sound absorption material 4 Cushion material

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shun Sato, Inventor, 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Inside Ishikawashima Building Materials Co., Ltd. (72) Inventor Toshihiko Sakamoto, 1-12-1 Yurakucho, Chiyoda-ku, Tokyo (72) Inventor Yutaka Yamamoto 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Ishikawashima Building Materials Industry Co., Ltd. (72) Inventor Yukio Sugiyama Shionagicho, Minato-ku, Nagoya City, Aichi Prefecture Ground) Inside Tokai Concrete Industry Co., Ltd. (72) Inventor Motohide Kawasaki 1-13-26 Nishiki, Naka-ku, Nagoya City, Aichi Prefecture Inside Onoda ALC Co., Ltd.

Claims (3)

[Claims] 1. A sound insulating wall structure comprising a sound insulating material and a sound absorbing material laminated, wherein cement mixed with coal ash is used for both the sound insulating material and the sound absorbing material. For a soundproof wall. 2. The soundproof wall structure according to claim 1, wherein a mixing ratio of the coal ash to the cement is 10% or more and 50% or less. 3. The sound insulating material is made of cement in which the coal ash is mixed, and the sound absorbing material is made of an air-hardened cemented material in which the coal ash is mixed. 3. The structure for a soundproof wall according to 1 or 2.