Nox purifying sound absorbing member

Description: TECHNICAL FIELD [Detailed description of the invention]

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INDUSTRIAL APPLICABILITY The present invention is NO._XRegarding the sound absorbing member for purification, for more details, NO to the sound absorbing material_XExcellent sound absorption effect and NO with a simple structure that has a purifying effect_XNO that has a purification effect at the same time_XIt relates to a sound absorbing member for purification.

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[Conventional technology] In recent years, NO contained in the exhaust gas emitted from automobiles, especially Ziesel automobiles._XThe pollution of the air environment is increasing due to the increase in the number of automobiles and the accompanying traffic congestion. Conventionally, this NO_XMetal oxides are known as substances that reduce the concentration of titanium dioxide, and among them, titanium dioxide is also known to have a strong photocatalytic action. NO by utilizing such strong photocatalytic action of titanium dioxide_XResearch to remove titanium dioxide has become more and more popular in recent years, and titanium dioxide is mixed to form sheets and panels, which are used for the outer walls of buildings._XIs being put to practical use.

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PROBLEM TO BE SOLVED: To solve a problem. Under such circumstances, in addition to the case where a sheet or panel as described above is used as a conventional building material (for example, an exterior wall), a specific method of applying the sheet or panel to various places is studied. It's about to happen. Therefore, as a result of various studies from such a viewpoint, the present inventors have applied a kneaded product containing cement, titanium dioxide powder and a specific fine aggregate to the sound absorbing material to obtain an excellent sound absorbing effect with a simple structure. NO_XNO that has a purification effect at the same time_XIt has been found that a sound absorbing member for purification can be obtained, and the present invention has been made here.

Therefore, the first problem to be solved by the present invention is an excellent sound absorbing effect with a simple structure and NO._XNO that has a purification effect at the same time_XThe purpose is to provide a sound absorbing member for purification. The second problem to be solved by the present invention is an excellent sound absorption effect and NO without damaging the existing surrounding environment._XNO that has a purification effect at the same time_XThe purpose is to provide a sound absorbing member for purification. Further, the third problem to be solved by the present invention is NO, which is easy for light to enter and easy to wash._XThe purpose is to provide a sound absorbing member for purification.

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Means for Solving the Problems The above-mentioned problems of the present invention are achieved by the following inventions.

(1) 50 parts by weight to 400 parts by weight of a fine aggregate having an average particle size selected from 100 parts by weight of cement, 5 parts by weight to 50 parts by weight of titanium oxide powder, and a particle size of 1 mm to 15 mm as a sound absorbing material. NO characterized by having a kneaded product containing_XSound absorbing member for purification. (2) The NO according to the first item, wherein the fine aggregate is at least one selected from sand, lightweight aggregate, glass grains or silica sand._XSound absorbing member for purification. (3) The NO according to the above item 1 or 2, wherein the porosity of the sound absorbing material obtained from the kneaded product is 10% or more._XSound absorbing member for purification.

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BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail below.<sub />_XThe sound absorbing member for purification is a fine aggregate having an average particle size selected from 100 parts by weight of cement, 5 parts by weight to 50 parts by weight of titanium oxide powder, and a particle size of 1 mm to 15 mm. It is characterized by having a kneaded product containing, which has an excellent sound absorbing effect and NO with a simple structure (does not complicate the structure of the sound absorbing material) without changing the existing environment._XIt has an excellent effect that the purification effect can be exhibited at the same time. Further, in the present invention, when a fine aggregate having an average particle size selected from 1 mm to 15 mm is used and the porosity is 10% or more, an excellent sound absorbing member can be obtained, thereby obtaining an excellent sound absorbing member. It has an excellent effect that light easily enters and the generated nitrate ions and the like are easily washed. In particular, when glass grains, lightweight aggregate and silica sand are used as the fine aggregate, a large amount of sunlight can be absorbed, so NO._XGreat removal effect.

In the present invention, the sound absorbing material or the sound absorbing base material may be those usually used in the technical field of the sound absorbing material or the sound absorbing base material. NO on these surfaces_XA kneaded product for purification is provided, and the thickness of the kneaded product layer is 15 mm to 2 mm, preferably 10 mm to 2 mm, and more preferably 8 mm to 3 mm. In the present invention, if the thickness of the kneaded product exceeds 15 mm, it becomes difficult for sunlight to permeate and the titanium layer is wasted. If the thickness is less than 2 mm, NO_XPurification efficiency is poor and durability is poor. When the kneaded product is provided on the perforated plate, the entire surface may be coated so as to cover the holes, but it is preferable to cover the holes so as not to seal them. The thickness of the glare concrete layer may be the thickness of the glare concrete layer usually used as a sound absorbing material, and is not particularly limited.

The sound absorbing member used in the present invention is manufactured by filling a lightweight aggregate with dazzling concrete, but as the lightweight aggregate, a lightweight aggregate for dazzling concrete is usually used, and it may be either natural or artificial. Pumice stones and the like are preferable for natural lightweight aggregates, and open-cell porous structures are preferable for artificial lightweight aggregates, and extremely excellent sound absorption can be obtained by using these. In the present invention, NO on this_XBy pouring the kneaded material for purification, the sound absorption effect and NO_XPurifying effect can be obtained at the same time. A method for producing this artificial lightweight aggregate is well known in the art.

In the present invention, NO_XSand, glass, lightweight aggregate, silica sand, etc. are used as the fine aggregate used for the kneaded material for purification, but when sand is used, glass grains with high light transmission or silica sand can be added and used. Sufficient light penetrates deeply and NO_XImprove the purification efficiency of. In the present invention, the particle size of the fine aggregate has an average particle size selected from 1 mm to 15 mm, and is particularly preferably 1 mm to 10 mm, more preferably 1 mm to 7 mm. The smaller the particle size of the fine aggregate, the better the sound absorbing effect, but when the particle size is smaller than 1 mm, a practical sound absorbing effect cannot be obtained. Further, even if the particle size exceeds 15 mm, the sound absorbing effect is reduced. NO_XAs described above, the thickness of the kneaded product for purification is 15 mm to 2 mm, preferably 10 mm to 2 mm, and more preferably 8 mm to 3 mm, as in the perforated plate. Further, the surface of the kneaded material layer for purification can be positively formed with irregularities, whereby light and NO can be formed._XAbsorption can be promoted. The addition ratio of the fine aggregate is 50 parts by weight to 400 parts by weight of the fine aggregate with respect to 100 parts by weight of the cement, but when the fine aggregate exceeds 400 parts by weight, the amount of titanium oxide is relatively reduced. So NO_XPurification efficiency is inferior.

The ratio of titanium oxide in the kneaded product used in the present invention varies depending on the type and particle size of titanium oxide, but is 5 to 50 parts by weight of titanium oxide powder with respect to 100 parts by weight of cement. Preferably, 10 parts by weight to 50 parts by weight of titanium oxide powder is used. More preferably, it is 20 parts by weight to 50 parts by weight of the titanium oxide powder. If the component ratio of the kneaded product used in the present invention is less than 5 parts by weight with respect to 100 parts by weight of cement, NO_XThe purification efficiency is not good, and if it exceeds 50 parts by weight, the strength decreases. When the amount of sand exceeds 400 parts by weight, the amount of titanium oxide powder is relatively small and NO._XPurification efficiency is inferior. In the present invention, the component ratio of the kneaded product is preferably 10 parts by weight to 50 parts by weight, more preferably 20 parts by weight to 50 parts by weight, and 50 parts by weight to 300 parts by weight of sand with respect to 100 parts by weight of cement. is there.

Fibers may be added to the kneaded product used in the present invention, and the fibers are not particularly limited, but the fibers include wallastnite, asbestos, E-glass fibers, and alkali-resistant. Inorganic fibers such as glass fiber, stainless fiber, etc .; natural organic fiber such as pulp or synthetic fiber, etc., and more specifically, as natural organic fiber, NBK pulp, LBK pulp, cotton pulp, hemp pulp and other pulp, etc. Examples include wood flour, sawdust, cork powder, various fibers, and examples of synthetic fibers include vinyl chloride, polypropylene, nylon, polyamide, polyester, polyurethane, vinylon, polyethylene, aramid fiber, and carbon fiber. These fibers are preferably 10 or less, preferably 1 mm to 10 mm in length, and more preferably 2 mm to 10 mm in length. The fiber diameter is preferably 0.001 mm to 2 mm. The amount of the fiber added in the present invention is 0.1 parts by weight to 5.0 parts by weight, preferably 1.0 part by weight to 4.0 parts by weight. If the amount of the fiber added is less than 0.1 parts by weight, the adhesiveness is weak, and if it exceeds 5.0 parts by weight, the number of voids increases and the strength decreases.

An organic substance such as a resin may be added to the kneaded product used in the present invention, and the resin is not particularly limited, but as an aqueous polymer dispersion, a rubber latex, a resin emulsion, or an increase is used. As the viscous agent, methyl cellulose, PVA, re-emulsified powder resin, and as the liquid polymer, polyester resin, epoxy resin, polyurethane resin and the like can be used. The addition of these resins has the effects of increasing strength and durability. The amount of the resin used in the present invention is 0.2% by weight to 50% by weight. If the amount of the resin is less than 0.2% by weight, there is substantially no effect of increasing the strength, and if it exceeds 50% by weight, the strength is rather lowered. Further, a coloring pigment may be added to the kneaded product of the present invention to produce a coloring effect, and the coloring pigment is preferably an inorganic pigment, such as red iron oxide, nickel titani yellow, ultramarine, navy blue, cobalt blue, carbon black, and cobalt green. Can be mentioned. The amount of the coloring pigment added in the present invention is 0.2 parts by weight to 20 parts by weight, and an excellent coloring effect is exhibited in this range.

(Action) In the present invention, NO without impairing the sound absorbing effect by having the kneaded material on the surface of the perforated plate or the dazzling concrete layer._XIt is possible to express the purifying effect of. In addition, good light transmission can be obtained by using glass and silica sand, so NO._XCan promote the purification effect of. Furthermore, the surface side of the sound absorbing material is a lightweight aggregate and NO._XBy having a surface layer made of a kneaded product for purification, the contact area of air is large and light easily enters, and rainwater or the like easily enters, so that cleaning with them is quick. Moreover, the sound absorbing effect and NO can be easily achieved without damaging the basic structure of the existing sound absorbing material._XPurification effect can be obtained, and economic efficiency can be improved.

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[Examples] Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

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[Example 1] FIG. 1 shows the NO of the present invention._XIt is sectional drawing which shows the sound absorbing member for purification. As shown in FIG. 1, 100 parts by weight of cement, 140 parts by weight of pearlite (1.5 mm to 2.2 mm in diameter), and 45 parts by weight of water are kneaded into a sound absorbing base material 1a made of extruded concrete, and then 65 mm. The pearlite layer 2 was formed by pouring until it became thick. Further, 80 parts by weight of cement, 20 parts by weight of titanium oxide, 140 parts by weight of pearlite having the above particle size, and 45 parts by weight of water are kneaded on this and poured into a thickness of 15 mm to NO._XThe purification layer 3 was formed. Then, the kneaded filling of each of these layers is cured and cured to NO._XA sound absorbing member 10 for purification was obtained. This NO_XWhen the sound absorption coefficient of the purification sound absorbing member 10 due to vertical incident was measured, the average sound absorption coefficient was 0.62 (125 to 2000 Hz), which was sufficient sound absorption performance. Also 20 cm in the container²A fragment of the sound absorbing member 10 of No. 10 was put in and irradiated with an ultraviolet lamp, and air containing 1 ppm of NO gas was flowed at 11 / min. 24-hour average NO for outlet air_XThe gas concentration is 0.08 ppm, which is an excellent NO._XIt had a gas purification ability. Reference numeral 7 is a resonator portion.

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[Example 2] FIG. 2 shows the NO of the present invention._XIt is sectional drawing which showed the other embodiment of the sound absorbing member for purification. NO in the same manner as in Example 1 except that the sound absorbing base material 1b made of an iron plate having a shape as shown in FIG. 2 was used instead of the sound absorbing base material 1a shown in FIG._XThe sound absorbing member 11 for purification was manufactured. When the sound absorption coefficient due to vertical incident was measured in the same manner as in Example 1, the average sound absorption coefficient was 0.59 (125 to 2000 Hz), which was sufficient sound absorption performance.

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[Example 3] FIG. 3 shows the NO of the present invention._XIt is sectional drawing which showed the other embodiment of the sound absorbing member for purification. In the sound absorbing base material 1a shown in FIG. 1, the NO described in Example 1 is contained._XNO of the present invention as in Example 1 except that a layer composed of only the kneaded product of the purification layer 3 was formed to a thickness of 80 mm._XThe sound absorbing member 12 for purification was manufactured. Obtained NO_XNO of sound absorbing member 12 for purification_XPurifying ability is the sound absorbing effect and NO without impairing the sound absorbing effect at the same time._XIt has an excellent effect that the purification effect can be obtained at the same time.

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[Example 4] NO described in Example 3._XThe kneaded product of the purification layer 3 uses crushed stone (particle size 2.2 mm to 3.2 mm), 75 parts by weight of cement, 25 parts by weight of -titanium oxide, and 50 parts by weight of water as a binder as a fine aggregate. It was blended in the ratio shown in Table 1 with respect to 100 parts by weight of crushed stone. Porosity obtained, NO_XThe removal rate and the sound absorption rate were measured, respectively. The results obtained are shown in Table 1.

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[Table 1] <img file="000003.tif" id="000003" he="040" wi="092" img-format="tif" img-content="drawing" />In addition, NO_XThe removal rate is 20 cm in a container irradiated with ultraviolet rays.²Place the sample of, NO_XInlet and outlet NO measured by flowing air with a concentration of 1 ppm_XThe ratio of concentrations.

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[Effect of the present invention] NO of the present invention_XIn the sound absorbing member for purification, by using a fine aggregate having an average particle size selected from a particle size of 1 mm to 15 mm, NO without impairing the sound absorbing effect._XThe purifying effect of Further, NO having a porosity of 10% or more on the surface side of the sound absorbing material._XBy having a surface layer made of a kneaded product for purification, the contact area of air is large and light easily enters, and rainwater or the like easily enters, so that cleaning with them is quick. Also easy sound absorption effect and NO_XPurification effect can be obtained, and economic efficiency can be improved. Furthermore, good light transmission can be obtained by using glass and silica sand, so NO._XCan promote the purification effect of.

[Simple explanation of drawings]

FIG. 1 is the NO of the present invention._XIt is sectional drawing which shows the sound absorbing member for purification.

FIG. 2 shows the NO of the present invention._XIt is sectional drawing which shows the other embodiment of the sound absorbing member for purification.

FIG. 3 is the NO of the present invention._XIt is sectional drawing which shows still another embodiment of the sound absorbing member for purification.

[Explanation of symbols]

1a, 1b Sound absorbing base material 2 Aggregate layer (pearlite) 3 NO_XPurification layer 4 Aggregate 5 Cement 6 Titanium oxide particles 7 Resonator part 10, 11, 12 NO_XSound absorbing member for purification

Continuation of front page (51) Int.Cl.⁶ Identification code In-house reference number FI Technical display location E04B 1/92 E04B 1/92 // C04B 111: 52