JP3551290B2 - Sound insulation board - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a sound insulating plate, for example, a sound insulating wall of a highway, a wall of a subway, a tunnel or a basement, or a concrete sound insulating plate used for a block wall or the like.
[0002]
[Prior art]
For example, on an expressway, a structure such as providing sound insulation plates on both sides of the road has been widely adopted in order to shield noise generated as a vehicle travels. Conventionally, as this type of sound insulating plate, a sound insulating plate that reflects noise toward the road using a cement plate or a sound absorbing plate provided with a special sound absorbing structure is used.
[0003]
[Problems to be solved by the invention]
However, in the case of a conventional configuration using a cement board as a sound insulation board, handling is difficult because the cement board is heavy. In addition, this cement plate has a problem that sound insulation is poor because it only reflects sound. Furthermore, in the case of a configuration employing a special sound absorbing structure, there is a problem that the cost is high.
[0004]
Therefore, an object of the present invention is to provide a light-weight sound insulating plate having high sound insulating properties.
[0005]
[Means for Solving the Problems]
The sound insulating plate of the present invention is characterized by comprising a support member and a sound absorbing material fixed to the supporting member, wherein the sound absorbing material includes a piece of wood mineralized in concrete.
[0006]
In the present invention, a mineralized wood piece is a wood piece such as a chip obtained by wood shaving or the like, which has been mineralized by a chemical treatment.
In this mineralization, for example, harmful components such as sugars contained in wood, which cause corrosion of wood and generation of bacteria, are removed or mineralized by chemical treatment.
[0007]
In the present invention, the sound absorbing material is fixed to one side or both sides of the support member. In the present invention, as the support member, a plate-like member having necessary rigidity, such as a concrete plate or a plastic plate, can be appropriately used. Here, in the case of a concrete board, since the sound absorbing material itself is mainly composed of concrete, it has good adhesiveness, and can be manufactured only by casting concrete on one or both surfaces of the sound absorbing material. Therefore, a concrete plate is preferable as the support member from the viewpoint of an adhesive with the support member and ease of manufacture.
[0008]
In the present invention, concrete used for the sound absorbing material is, specifically, a cement composition comprising an inorganic cement, an aggregate, water, and a foam composition comprising a thin film forming agent and a foaming agent. Is used.
[0009]
Further, in the present invention, concrete used for the sound absorbing material is more specifically, 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, From 1 to 96 parts by weight, and about 0.5 to 5 parts by weight of a foaming agent.
[0010]
Here, 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 gravel is used. More specifically, perlite, vermiculite, expanded shale, clay and the like are used.
[0011]
Film-forming agents are used to increase the stability of the foam, and form a film at room temperature, and are formed of a cold water-soluble organic compound such as a synthetic resin emulsion that is compatible with the inorganic cement used. Used. In this case, the synthetic resin emulsion preferably has a transition temperature of about 10C to 25C.
[0012]
As the above-mentioned synthetic resin emulsion, specifically, for example, an emulsion having a total solid content of 47% to 55% and confirmed as a good foam stabilizer is used. Such a synthetic resin emulsion is used in a range of 1 to 96 parts by weight.
More specifically, a vinyl acetate homopolymer, a copolymer of acrylic vinyl acetate such as Polyco 2151 manufactured by Borden, and a copolymer of vinyl chloride internally plasticized A plasticized vinyl chloride copolymer, a polyacrylic emulsion such as Rhoplex AC35 manufactured by Rohm & Hass, a copolymer of carboxylstyrene-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.
[0013]
The foaming agent is a nonionic 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 stabilized until the cement solidifies in the foamed and expanded state. The cement is then cured and dried to produce a lightweight useful product. Here, the foaming operation of the foaming agent is stabilized by the thin film forming agent.
[0014]
In addition to the above, if necessary, polyester fiber or glass fiber can be used in combination as a reinforcing fiber material. In this case, these fibers are used in chopped or woven fabrics. Further, known water reducing agents and plasticizers can be incorporated in the foamed composition.
[0015]
Further, a configuration in which fly ash is added can also be adopted. The fly ash is a useful additive when the cementitious composition is used in a salt-containing environment such as a road, and can prevent the cementitious composition from deteriorating 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 reduces the mixture resistance while improving the flowability of the mixture. Fly ash can be obtained as a derivative after burning coal in a power plant.
[0016]
The sound insulating material of the present invention having the above-described configuration includes a mineralized wood piece, and the mineralized wood piece is relatively lightweight, and thus, when a conventional concrete plate is used. In comparison, the weight of the sound insulating material can be significantly reduced.
[0017]
Also, by using a concrete containing a foaming composition as described above as the concrete used for the sound absorbing material, the foaming composition contains a large amount of foam (air) and is light in weight. The weight can be reduced.
[0018]
In the present invention, 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 is formed in the slurry, and a large amount of foam is formed in the foaming composition after solidification of the cement, so that the cementitious composition can be interconnected. A connected and open cell-like structure results. As a result, the density of the cementitious composition can be reduced, and a lightweight cellular cementitious composition having sound absorption, heat insulation, and fire resistance can be provided.
[0019]
Also, making the cementitious composition lighter requires incorporating more foam into the slurry, which is achieved by incorporating more foaming agent into the slurry. In particular, good sound absorption properties can be achieved by releasing at least 20% -100% of the surface area of the interconnected cellular structures in the composition.
[0020]
Further, in the present invention, since the sound absorbing material is fixed to both surfaces of the support member, the sound insulation is remarkably improved as compared with the case where the support member is used alone, and the concrete system having the above structure as the sound absorbing plate is used. By using the one, it is possible to make the structure cheap and lightweight.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the sound insulating plate of the present invention will be described.
1 and 2 show a sound insulating plate according to an embodiment. The sound insulating plate 10 includes a support member 1 and a sound absorbing material 2 fixed to both surfaces of the support member 1. As the support member 1, a concrete plate of a material generally used conventionally, for example, a material made of Portland cement and sand or water is used. Further, a reinforcing bar 11 is provided at the center of the support member 1. Further, at the upper end of the support member 1, when a plurality of sound insulating plates 10 are juxtaposed in a vertical direction, a convex portion 12 that fits into a concave portion of the sound insulating plate 10 located above is formed. In addition, a concave portion 13 is formed at a lower end portion of the support member 1 to be fitted with a convex portion of the sound insulating plate similarly located on the lower side.
[0022]
The sound absorbing material 2 is obtained by mixing a wood piece mineralized by a chemical treatment with a cementitious composition and solidifying it. Examples of the cementitious composition include a synthetic resin emulsion, a slurry composed of inorganic cement such as Portland cement, calcium cement, gypsum cement, and magnesia cement; an aggregate such as perlite, vermiculite, expanded shale, and clay; and water. A foaming composition comprising a thin film forming agent comprising a nonionic surfactant or an anionic surfactant or a foaming agent comprising a mixture thereof is mixed, and the inorganic cement is coagulated in a foamed state. Things are used.
[0023]
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 a thin film forming agent, and about 0.5 to 5 parts by weight of a foaming agent In this range, sufficient air cells are formed in the cementitious foam composition. The air cell allows the cementitious composition to have high sound absorption characteristics (sound insulation).
[0024]
The sound insulating plate 10 having the above configuration is manufactured, for example, by the following steps. That is, a slurry having a composition obtained by mixing the above-mentioned mineralized wood piece and the cementitious composition constituting the sound absorbing material 2 is poured into a predetermined mold, and a concrete slurry having the composition constituting the supporting member 1 is placed thereon. Is poured, a reinforcing bar 11 is set, a concrete slurry having a composition constituting the support member 1 is poured onto the reinforcing bar 11, and a slurry having the above composition constituting the sound absorbing material 2 is further poured thereon. Then, the above-mentioned respective slurries are hardened while applying a predetermined pressure from above, thereby obtaining the sound insulating plate 10 in which the sound absorbing material 2 is integrated on both surfaces of the support member 1.
[0025]
In addition, the sound insulating plate 10 of the present invention having the above configuration has a good sound insulating property due to the sound absorbing material 2. Further, the sound absorbing material 2 can form various surface patterns such as wood grain style and granite style by pouring a slurry into a mold during manufacturing. Furthermore, at the time of mixing the raw materials at the time of this production, by mixing a colorant or by spray coating (for example, coating of an acrylic latex polymer) after the production, coloring according to the application, for example, to the color of the installation environment The combined coloring can be easily performed, and the water resistance and strength can be improved. Here, color pigments such as titanium oxide, iron oxide, ferric oxide, and chromium oxide are used as the colorant.
[0026]
Further, the sound absorbing material 2 can form various surface patterns such as wood grain style and granite style by pouring into a form frame during manufacturing. Furthermore, at the time of mixing the raw materials during the production of the sound absorbing material 2, a colorant is mixed or spray-painted (acrylic painted) after the production, so that the color is adjusted according to the application, for example, according to the color of the installation environment. Coloring can be easily performed.
[0027]
The sound insulating plate of this embodiment can be used, for example, for a wall facing a road where noise is generated, or a wall or ceiling of a wall or a basement for civil use.
[0028]
FIG. 3 shows a sound insulating plate according to another embodiment. That is, the sound insulating plate 10 shown in FIG. 3A is an example of the sound insulating plate 10 located at the uppermost position when a plurality of sound insulating plates are vertically arranged as described above. And the convex part 12 of the upper end part is covered with mortar or the like.
[0029]
The sound insulating plate 10 shown in FIG. 3B is also an example of the sound insulating plate 10 located at the lowermost position. The width of the lower half of the support member 1 is gradually increased from top to bottom in the figure. By changing the width of the support member 1 in this manner, the strength of the sound insulating plate 10 can be increased in a portion where the width of the support member 1 is wide, and the strength of the entire sound insulating plate can be improved.
[0030]
In the above example, the embodiment in which the sound absorbing material 2 is provided on both surfaces of the support member 1 has been described. However, another structure in which the sound absorbing material 2 is provided on one surface of the support member 1 may be employed. In addition, the support member 1 is not limited to the concrete plate described above, and for example, a plastic plate or the like can be appropriately used. Further, the fixing between the support member 1 and the sound absorbing material 2 may be performed using, for example, an adhesive, in addition to the method described above.
[0031]
【The invention's effect】
According to the present invention, it is possible to provide a sound insulating plate that is lightweight and inexpensive and has excellent sound insulating properties.
[Brief description of the drawings]
FIG. 1 is a sectional view of a sound insulating plate according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a sound insulating plate according to the embodiment of the present invention.
FIGS. 3A and 3B are cross-sectional views of a sound insulating plate according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Support member 2 Sound absorbing material 10 Sound insulation board

Claims (5)

A support member;
A sound absorbing material fixed to the support member,
A sound insulating plate, wherein the sound absorbing material includes mineralized wood pieces in concrete. The sound insulating plate according to claim 1, wherein the sound absorbing material is fixed to both surfaces of the support member. The sound insulating plate according to claim 1, wherein the support member is a concrete plate. The concrete used for the sound absorbing material is a cementitious composition comprising an inorganic cement, an aggregate, water, and a foamed composition comprising a thin film forming agent and a foaming agent. 4. The sound insulating plate according to any one of 1 to 3. The concrete used for the 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, 1 to 96 parts by weight of a thin film forming agent, and a foaming agent. The sound insulating plate according to any one of claims 1 to 4, comprising about 0.5 to 5 parts by weight.

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