JP3025114U - Sound insulation - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a sound insulation material that is inexpensive and has excellent sound insulation. [Structure] A sound insulation material composed of a concrete board 1 and a sound absorbing material 2 attached to one surface of the concrete board 1. The sound absorbing material 2 includes inorganic cement, aggregate, water,
A cementitious composition having an interconnected and open cellular structure comprising a foaming composition composed of a film forming agent and a foaming agent.

Description

[Detailed description of the device]

[0001]

TECHNICAL FIELD OF THE INVENTION

 The present invention relates to a sound insulation material, for example, a sound insulation material made of concrete used for a soundproof wall of a highway, a concrete wall of a subway, a tunnel or a basement.

[0002]

[Prior art]

 For example, on highways, sound-insulating materials are widely used as sound-insulating walls on both sides of the road in order to shield the noise generated as the vehicle travels. Conventionally, as this type of sound insulation material, for example, a cement board is used to reflect noise to the road side, or a special sound absorption structure is provided to absorb noise.

[0003]

[Problems to be solved by the device]

 However, when a cement board is used as a sound insulation material, there is a problem that the sound insulation is poor because it is difficult to handle because the cement board is heavy and it simply reflects sound. In addition, there is a problem that the cost of the special sound absorbing structure is high.

An object of the present invention is to provide a sound insulation material which is inexpensive and has excellent sound insulation.

[0005]

[Means for Solving the Problems]

 The sound insulation material of the present invention comprises a concrete board and a sound absorbing material attached to one side of the concrete board, wherein the sound absorbing material is an inorganic cement, an aggregate, water, and a water-soluble thin film forming agent. And a foaming composition composed of a foaming agent, which is a cementitious composition having an interconnected and open cellular structure.

More specifically, the above sound absorbing material is about 100 parts by weight of inorganic cement, 10 to 350 parts by weight of aggregate, about 35 to 150 parts by weight of water, and 1 to 96 parts by weight of a thin film forming agent. Parts, a foaming agent of about 0.5 to 5 parts by weight is used.

As the inorganic cement, Portland cement, calcium cement, gypsum cement, magnesia cement and the like can be used. As the aggregate, a thermally expanded lightweight inorganic substance or sand is used. More specifically, perlite, vermiculite, expanded shale, clay and the like are used.

Thin film formers are used to increase foam stability and are cold water soluble organics, such as synthetic resin emulsions, that form thin films at room temperature and are compatible with the inorganic cement used. A compound is used. In this case, the synthetic resin emulsion preferably has a transition temperature of about 10 ° C to 25 ° C.

As the synthetic resin emulsion, specifically, an emulsion having a total solid content of 47% to 55% and confirmed as a good foam stabilizer is used. Such synthetic resin emulsion is used in the range of 1 to 96 parts by weight. More specifically, a homopolymer of vinyl acetate, a copolymer of acrylic vinyl acetate such as Polyco 2151 manufactured by Borden, a copolymer of vinyl chloride internally plasticized. , An externally plasticized vinyl chloride copolymer, a polyacrylic emulsion such as Rhoplex AC35 manufactured by Rohm & Hass, of carboxylic styrene-butadiene. It can be formed using a resin such as a copolymer, a vinyl chloride-vinylidene chloride copolymer, or a vinyl chloride-vinylidene chloride-acrylic tar polymer. Also, UCAR latex (Latex) 413 can be used.

The foaming agent is a nonionic surfactant or anionic surfactant or a mixture thereof. In use, these surfactants are mixed with the slurry of the aqueous foam composition of the present invention and are stabilized in the expanded and expanded state until the cement solidifies. The cement is then cured and dried to produce a lightweight, useful product. Here, the foaming action of the foaming agent is stabilized by the thin film forming agent.

In addition to the above, polyester fiber or glass fiber may be used together as a reinforcing fiber material, if necessary. In this case, these fibers are used as chopped or woven fabrics. Also, a known water reducing agent or plasticizer can be incorporated into the foaming composition.

Further, a configuration may be adopted in which fly ash is added. This fly ash is a useful additive when the cementitious composition is used in a salt-containing environment such as road, and can prevent the deterioration of the cementitious composition due to salt. Fly ash is also a versatile filler and is chemically inert. Thus, the inclusion of fly ash increases the fire resistance of the material and also improves the flowability of the mixed material while reducing the mixture resistance. Fly ash can be obtained as a derivative after burning coal in a power generator.

The foaming composition used for the sound absorbing material in the present invention contains a large amount of bubbles (air). Therefore, the cementitious composition of the present invention has a density lower than that of general concrete composed of inorganic cement and aggregate itself. In this case, the foam in the foam composition is introduced by mixing a slurry of inorganic cement, aggregate and water with the foam composition. That is, by including the foaming composition in the slurry, an excessive amount of air cells are formed in the slurry, and a large amount of bubbles are formed in the foaming composition after the cement is solidified. The cells are interconnected to form an open cell-like structure. As a result, the density of the cementitious composition can be reduced, and a lightweight cell-like cementitious composition having sound absorption, heat insulation, and fire resistance can be provided.

Further, in order to make the cementitious composition lighter in weight, it is necessary to incorporate more foam into the slurry, which is achieved by incorporating more foaming agent into the slurry. . Specifically, at least 20% -100% of the surface area of interconnected cellular structures within the composition can be released to provide good sound absorption properties.

The foamed cementitious composition of the present invention is formed into a desired shape by pumping, spraying, casting, and troweling, and has a density lower than those of conventional cements of inorganic cement and aggregate.

Further, in the present invention, since the sound absorbing material is attached to one surface of the concrete plate, the sound insulation is remarkably enhanced as compared with the case where the concrete plate is used alone. In addition, by using a concrete-based sound absorbing plate having the above-mentioned structure, it is possible to make the structure inexpensive and lightweight.

[0017]

[Embodiment]

 Embodiments of the sound insulation material of the present invention will be described below.

FIG. 1 is a perspective view showing a sound insulation material of an embodiment. This sound insulation material is configured by bonding the sound absorbing material 2 to one surface side of the concrete plate 1 with an adhesive or the like. The concrete plate 1 is made of a material generally used in the past, for example, one made of portland cement and sand or water.

As the sound absorbing material 2, a slurry composed of inorganic cement such as Portland cement, calcium cement, gypsum cement and magnesia cement, aggregate such as perlite, vermiculite, expanded shale and clay, and water. In addition, a foaming composition composed of a thin film forming agent consisting of a synthetic resin emulsion and a foaming agent consisting of a nonionic surfactant or anionic surfactant or a mixture thereof is mixed, and the inorganic cement in a foamed state is mixed. A cementitious composition that is formed by solidifying is used. In this case, about 100 parts by weight of inorganic cement, 10 to 350 parts by weight of aggregate, about 35 to 150 parts by weight of water, 1 to 96 parts by weight of thin film forming agent, and about 0. When the amount is in the range of 5 to 5 parts by weight, sufficient air cells are formed in the cementitious foam composition, and high sound absorbing properties (sound insulation) can be provided.

The sound-insulating material of the present invention having the above-described structure has good sound-insulating properties due to the sound-absorbing material 2. Further, since it is composed of the cement board 1 and the cement-based sound absorbing material 2, it also has fire resistance.

Further, the sound absorbing material 2 can form various surface patterns such as a wood grain look and a granite look by pouring the slurry into the frame during manufacturing. Furthermore, by mixing a colorant during the mixing of the raw materials at the time of manufacturing, or spray coating (for example, coating of acrylic latex polymer) after manufacturing, coloring according to the application, Coloring can be easily done according to the color, and water resistance and strength can be improved. In this case, color pigments such as titanium oxide, iron oxide, ferric oxide, and chromium oxide are used as the colorant.

The sound insulation material of this embodiment can be used for a wall facing a road where noise is generated, or for consumer use, for example, a wall or a basement wall or ceiling. In this case, the sound absorbing material 2 side of the sound insulating material is directed to the noise generating side. For example, in the case of application to a wall or fence of a road, the sound absorbing material 2 may be directed to the road side, and in the case of a basement wall or floor, the sound absorbing material 2 may be directed to the inside of the room. .

[0023]

[Effect of device]

 According to the present invention, it is possible to provide a sound insulating material which is inexpensive and has excellent sound insulating properties, which is configured by bonding a sound absorbing material to one surface of a concrete plate.

[Brief description of drawings]

FIG. 1 is a perspective view of a sound insulation material according to an embodiment of the present invention.

[Explanation of symbols]

 1 Cement board 2 Sound absorbing material

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Claims (2)

[Scope of utility model registration request] 1. A concrete board and a sound absorbing material attached to one surface of the concrete board, wherein the sound absorbing material is composed of inorganic cement, aggregate, water, a thin film forming agent and a foaming agent. A sound insulating material, which is a cementitious composition having an interconnected and open cell-like structure comprising a foam composition. 2. The sound absorbing material, wherein the inorganic cement is about 100 parts by weight, the aggregate is 10 to 350 parts by weight, the water is about 35 to 150 parts by weight, the thin film forming agent is 1 to 96 parts by weight, and The sound insulating material according to claim 1, wherein the foaming agent comprises about 0.5 to 5 parts by weight.