Humidity-regulating and deodorizing building materials and method for producing the same

Abstract

It is substantially impossible to use, as a building material as it is, a raw material having humidity control and deodorizing effects without molding it, in terms of distribution as a building material and on-site work. A method of molding while maintaining the humidity control and deodorizing functions is required. Provided are a humidity control and deodorizing building material capable of improving productivity enabling molding at low pressure while maintaining the humidity control and deodorizing functions of rhyolitic tuff powder, and a method for producing the same. 【Solution means】A colloidal silica dispersion is added to a specific composition of porous rock powder, inorganic powder with a high specific surface area, and calcium carbonate and / or slaked lime Kneading to carry out a step, a step of filling the kneaded preparation into a predetermined molding frame mold, a step of pressure molding, and a drying step to dry and cure for production.

Description

Technical Field

[0001] The present invention relates to a humidity-regulating and deodorizing building material and a method for manufacturing the same, and relates to a humidity-regulating and deodorizing building material and a method for manufacturing the same, which maintain the humidity-regulating and deodorizing functions of porous rocks such as rhyolitic welded tuff, and inorganic powders with a high specific surface area such as Kanuma soil and zeolite, and impart strength without sintering.

Background Art

[0002] Conventionally, many materials have been reported as humidity-regulating building materials, such as materials with slow moisture-releasing properties such as zeolite and diatomaceous earth, which are hardened with a setting and hardening agent such as cement or gypsum and mixed and fired with clay, etc., and those that utilize the moisture absorption and desorption properties of alumina generated by the dehydration of aluminum hydroxide (Patent Documents 1 to 5). All of these are manufactured by adding a firing process. As a method for manufacturing a humidity-regulating building material that does not use a firing process, Patent Documents 6 to 8 disclose a method for manufacturing a humidity-regulating building material that does not perform a firing process. Specifically, Patent Document 7 discloses a cured body composed of a composition containing slaked lime and / or quicklime, lime sand, porous stone powder, clay, porous clay minerals, and a Ca ion-containing aqueous solution, and a method for manufacturing by press-molding the clay composed of the above specific composition, drying and hardening the obtained press-molded body to obtain a cured body.

[0003] For example, Patent Document 6 discloses a humidity-regulating building material obtained by mixing powder of rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture, which is called Ryuyama stone, hemihydrate gypsum as a binder that hardens at room temperature, and water, pouring the mixture into a mold and naturally drying it. As a binder that hardens at room temperature, cement etc. are also described in addition to hemihydrate gypsum. Further, the same document also discloses a humidity-regulating building material obtained by mixing powder of Ryuyama stone, clay, and water, molding using a container, and firing after natural drying.

[0004] Patent Document 8 also discloses a humidity control building material composed of a cured body of a composition containing slaked lime and / or quicklime, lime sand, powder of rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture, clay, porous clay minerals, and a Ca ion-containing aqueous solution. A method of manufacturing the same is disclosed, which comprises press-forming the clay soil composed of the above specific composition, and drying and curing the obtained press-formed body to obtain a cured body. On the other hand, Patent Document 9 discloses a technology of a coated wall material that utilizes the excellent humidity control property of rhyolitic welded tuff powder distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture. And Non-Patent Document 1 also discloses that the pulverized product of rhyolitic welded tuff may be used as a material for a coating agent having excellent humidity control properties and the like.

[0005] On the other hand, Patent Document 10 discloses a humidity control material obtained by carbonating a water-containing molded body composed of a mixed powder of slaked lime, inorganic waste powder, and inorganic powder having a high specific surface area. Among these, as the inorganic powder having a high specific surface area, dry powders of Kanuma soil, natural zeolite, and diatomaceous earth are disclosed. When an inorganic powder having a high specific surface area is added, a larger amount of moisture absorption and desorption is exhibited than in the case of a sample without addition. It is disclosed that a high humidity control function can be obtained by adding an inorganic powder having a high specific surface area.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Patent Document 7

[0007] [Non-Patent Document 1] University of Tsukuba, "Sprouts of Science" 2012 [Summary of the Invention] [Problems to be Solved by the Invention]

[0008] It is substantially impossible to use a material having a humidity control and deodorizing function as a building material as it is without molding it. To solve this, it is generally necessary to process it into a building material such as a tile. However, conventional humidity control and deodorizing building materials that are poured into a mold and molded have poor productivity. When cement is used as a binder that hardens at room temperature, a humidity control building material with relatively high strength can be obtained due to increased curability, but its moisture absorption and desorption performance decreases. Also, conventional humidity control building materials obtained by firing are easy to ensure strength, but require a firing process, resulting in poor productivity and high firing costs. Therefore, an object of the present invention is to provide a humidity control and deodorizing building material that can be molded without going through a firing process while maintaining the moisture absorption and desorption performance of natural rock, and a method for manufacturing the same. That is, it is to find a binding functional material that has effective strength as a building material and can be easily molded while maintaining the functions of the humidity control and deodorizing material. [Means for Solving the Problems]

[0009] As a result of intensive research to solve the above problems, the inventors of the present invention have found that a material having a humidity control and deodorizing function is combined with a conventionally known binding MaterialSpecifically, a mixture of porous rock powder, which is a moisture-regulating and deodorizing material, particularly rhyolitic tuff powder, and inorganic powder with a high specific surface area is used as a binding material, and a colloidal silica dispersion with calcium carbonate and / or slaked lime is used to Kneading The inventors have found that by applying a pressure-molding agent to a building material containing a fluorine-containing compound and solidifying the resulting material, the building material can be molded under pressure while retaining its moisture-regulating and deodorizing functions, and have completed the present invention.

[0010] The present invention comprises the following configurations. (1) A moisture-regulating and deodorizing building material, which is a porous rock powder having moisture-regulating and deodorizing functions. At least one selected from the powders of rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture, powders of natural pumice derived from Towada Volcano, powders of koga stones produced in Niijima, Izu Islands, and powders of hoba stones produced in Minokamo Shirakawa, Gifu Prefecture, and at least one powder selected from Kanuma soil, Akadama soil, zeolite, sepiolite, acid clay, and Otani stone A moisture-regulating and deodorizing building material characterized by being molded using a binding functional material made by adding calcium carbonate and / or hydrated lime to colloidal silica. (2) The humidity-regulating and deodorizing building material described in 1 above Clay minerals of green mudstone produced in Awaji Island, Hyogo Prefecture, fine particles of gypsum produced in Ibaraki Prefecture and oyster shell powder. (3) When a material that has a constant weight in an atmosphere at 25°C and a relative humidity of 50% is placed in contact with air at 25°C and a relative humidity of 75% for 12 hours, the moisture absorption amount is at least 60 g / m 2 3. The moisture-regulating and deodorizing building material according to claim 1 or 2, characterized in that (4) At least one selected from the powders of rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture, powders of natural pumice derived from Towada Volcano, powders of koga stones produced in Niijima, Izu Islands, and powders of hoba stones produced in Minokamo Shirakawa, Gifu Prefecture, and at least one powder selected from Kanuma soil, Akadama soil, zeolite, sepiolite, acid clay, and Otani stone A mixture of materials or the mixture of materials Clay minerals of green mudstone produced in Awaji Island, Hyogo Prefecture, fine particles of gypsum produced in Ibaraki Prefecture A specific composition consisting of a material mixture containing at least one additive selected from oyster shell powder and calcium carbonate and / or hydrated lime, and a colloidal silica dispersion is added to the material mixture. Kneading A process of Kneading The manufacturing method of the humidity-regulating and odor-eliminating building material is characterized by the steps of filling the prepared material into a specified molding form, pressurizing it to form it, and drying it. Effect of the Invention

[0011] The humidity-regulating and deodorizing building material of the present invention can be manufactured without pouring the raw materials into a mold to form them or firing them, which improves productivity. In addition, the humidity-regulating and deodorizing building material of the present invention can be manufactured without pressing (267 kgf / cm2 ~1,067 Kgf / cm 2 (2.62×10 7 N / m 2 ~10.46·×10 7 N / m 2 )、2×10 4 Kgf / piece ~ 8×10 4 Kgf / piece (5 cm × 15 cm)), it can be molded, so the mold used for molding does not require the strength of an ordinary mold. Therefore, using a 3D printer, products with arbitrary shapes and patterns can be easily and inexpensively prepared. Thus, since the preparation of the mold is simple and can be freely changed, and it can finely meet the demands of customers, it can contribute to the improvement of product value. Further, the humidity conditioning and deodorizing building material of the present invention is composed of a cured body of a specific composition containing a porous rock powder having a humidity conditioning and deodorizing function, such as rhyolitic tuff powder typified by ryokanshi, and an inorganic powder with a high specific surface area, such as kanuma soil or zeolite, in a binding functional material obtained by adding colloidal silica dispersion, calcium carbonate, and / or slaked lime as a binding material, so that it is possible to ensure moisture absorption and desorption performance and strength.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0013] The humidity conditioning and deodorizing building material of the present invention is a mixture of a humidity conditioning and deodorizing material containing a porous rock powder having a humidity conditioning and deodorizing function, such as rhyolitic tuff powder typified by ryokanshi, and an inorganic powder with a high specific surface area, such as kanuma soil or zeolite, with a binding material obtained by adding a colloidal silica dispersion, which is a binding functional material, calcium carbonate, and / or slaked lime KneadingIt is prepared by filling a moldable viscosity-prepared material into a predetermined molding frame mold, pressure molding it, and then drying it. By the coexistence action of colloidal silica and calcium carbonate and / or slaked lime, while ensuring the strength of the press-molded body, it provides an epoch-making manufacturing method and high-functional products that can be molded into any shape without impairing the humidity control and deodorizing functions of porous rocks and inorganic materials with a high specific surface area.

[0014] The mixing ratio of the powder mixture prepared by adding calcium carbonate and / or slaked lime to a porous rock powder, such as Ryuyama stone, and an inorganic powder with a high specific surface area, such as Kanuma soil or zeolite, and Kneading The compounding ratio of the colloidal silica dispersion for this purpose can be appropriately determined according to the target humidity control and deodorizing ability and the required strength of the molded body. Also, in the dispersion medium, in addition to the colloidal silica dispersion, other components are not prevented from being compounded. As long as it is within the range of maintaining a predetermined humidity control and deodorizing performance, for example, it is also possible to add an appropriate amount of Portland cement, white cement, various silicate compounds, gypsum, etc. Also, pigments for coloring the product are appropriately selected.

[0015] Adding at least one additive selected from clay, such as the clay used as a raw material for tiles produced on Awaji Island, Hyogo Prefecture, clay minerals, fine particles of gypsum stone, and oyster shell powder, to a porous rock powder, such as Ryuyama stone, and an inorganic powder with a high specific surface area, such as Kanuma soil or zeolite, is also included in the scope of the present invention.

[0016] The humidity conditioning and deodorizing building material of the present invention can be manufactured by press-molding a clay soil mainly composed of a specific composition containing porous rock powder, inorganic powder with a high specific surface area, colloidal silica, and calcium carbonate and / or slaked lime (hereinafter referred to as the specific composition), and curing the obtained press-molded body by drying to obtain a cured body. In addition, due to the coexistence effect of the colloidal silica, calcium carbonate and / or slaked lime contained in the above specific composition, the strength of the press-molded body can be ensured. Therefore, the humidity conditioning and deodorizing building material of the present invention can be manufactured without firing, so the productivity can be improved. Further, since the humidity conditioning and deodorizing building material of the present invention is composed of the cured body of the above specific composition, the moisture absorption and desorption performance and strength can be ensured.

[0017] Examples of the porous rock constituting the porous rock powder include, for example, rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture. Specifically, Ryuzan stone, feldspar (osaishi), Takamuro stone. Other examples include natural pumice derived from Towada Volcano (hereinafter referred to as Towada Lake pumice), Koga stone produced on Niijima Island in the Izu Islands (hereinafter referred to as Niijima Koga stone), and Hokke stone produced in Minokamo Shirakawa, Gifu Prefecture (hereinafter referred to as Minokamo Shirakawa Hokke stone), etc. The porous rock powder is not limited to these, and various materials can be applied as long as they have moisture absorption and desorption performance. The porous rock can also be used alone or in combination of two or more. Among these, from the viewpoints of high hardness and viscosity, easy processing, and rich color, Ryuzan stone, which is a kind of rhyolite welded tuff, can be preferably used. Since this powder has moisture absorption and desorption performance, it is particularly useful for the present invention.

[0018] For the high specific surface area inorganic powder, porous clay mineral powders such as Kanuma soil, Akadama soil, zeolite, sepiolite, acid clay, and Otani stone are used. Among these, Kanuma soil is a general term for pumice produced in Kanuma City, Tochigi Prefecture, which is used in agriculture and horticulture. It has a rounded shape. Although it is called soil, it is actually weathered pumice and has a compressive strength that can be crushed with a finger. Also, zeolite, also known as zeolite, is a porous, high specific surface area inorganic material and is known as a humidity control and deodorizing functional material. One or more powders of the above high specific surface area inorganic powders may be appropriately mixed. By using these, when preparing the clay, it becomes easier to adjust the kneaded state of the above specific composition. Since the high specific surface area inorganic powder has adsorption performance, it can contribute to suppressing the decrease in the moisture absorption and desorption performance of the humidity control and deodorizing building materials.

[0019] A mixture of porous rock powder, high specific surface area inorganic powder, and calcium carbonate and / or slaked lime Kneading As the dispersion medium, a colloidal silica dispersion in which colloidal silica with a particle size of 5 to 80 nm is dispersed in water at a concentration of 20 to 50 (W / V)% is preferably used. For example, a product name (Snowtech, manufactured by Nissan Chemical Industries, Ltd.) can be used. The particle shape of the colloidal silica is selected to have a particle size suitable for enhancing the bonding of the porous rock powder and the high specific surface area inorganic powder in cooperation with calcium carbonate and / or slaked lime. As the calcium carbonate, commercially available powder, those derived from waste eggshells, and those derived from shells can be used. As the slaked lime, commercially available powder can be used. The combination of the colloidal silica dispersion and calcium carbonate and / or slaked lime is suitable for exerting the function as a binder by enhancing the adhesion effect between particles by the silica colloid. is appropriately selected.

[0020] In the above-specified composition, the proportion of each component is as follows: the porous rock powder is 20 - 55%, more preferably 25% - 50%; the inorganic powder with a high specific surface area is 10 - 40%, more preferably 15% - 35%; calcium carbonate and / or slaked lime is 5% - 35%, more preferably 10% - 25%; colloidal silica is 10% - 30%, more preferably 15% - 30%. The content of calcium carbonate and / or slaked lime may be appropriately blended and used as calcium carbonate alone, slaked lime alone, or both within the above range. Note that the proportions of the above components are selected so that the total is 100%. Also, the upper and lower limit values in the proportions of the above components can be arbitrarily combined. Further, pigments and other additives, such as Portland cement, white cement, various silicate compounds, and gypsum, may be mixed. Their proportions can be, for example, 0.1% or more and 5% or less based on the total proportion of 100% of the above components. Note that the proportions of the above components are in weight%.

[0021] Within the range of each component of the above-specified composition, one or more of the powder of clay or clay minerals (e.g., chlorite) produced in Awaji Island, Hyogo Prefecture, fine particles of gypsum produced in Ibaraki Prefecture, and commercially available oyster shell powder can be further added in an amount of 5 - 28%. The amounts of these powders of clay minerals, fine particles of gypsum, and oyster shell powder are appropriately selected within the range not exceeding the amount of the porous rock powder.

[0022] Make the above-specified composition uniform Kneading and put it into a predetermined mold prepared in advance, and apply a pressure of 20 - 80 tons (196 - 784 KN) per 5×15 cm (75 cm 2 ) for pressure molding. Then, remove the molded product from the mold and dry it forcibly with warm air at 100°C for 8 hours. The above press pressure can be appropriately increased or decreased depending on the composition or shape of the humidity-adjusting and deodorizing building material to be prepared, or the working environment, etc.

[0023] The shape of the humidity-adjusting and deodorizing building material of this embodiment is not particularly limited, but for example, a tile-like shape is exemplified. That is, the humidity-adjusting and deodorizing building material of this embodiment can be preferably applied as a humidity-adjusting and deodorizing tile.

[0024] As described above, the humidity conditioning and deodorizing building material of the present embodiment is composed of a cured body obtained by curing the above specific composition. Specifically, the humidity conditioning and deodorizing building material of the present embodiment is composed of a cured body obtained by drying and curing a press-molded body of the above specific composition. That is, the cured body constituting the humidity conditioning and deodorizing building material of the present embodiment is not fired. The humidity conditioning and deodorizing building material of the present embodiment exhibits an unexpected and remarkable effect that it can ensure high strength while maintaining the humidity conditioning and deodorizing functions of the raw materials despite the cured body not being fired.

[0025] The humidity conditioning and deodorizing building material of the present embodiment can be manufactured as follows, but is not limited thereto. The manufacturing method of the humidity conditioning and deodorizing building material of the present embodiment has a clay preparation step, a press molding step, and a drying and curing step, and does not have a firing step.

[0026] The clay preparation step is a step of preparing clay composed of the above specific composition including rhyolitic welded tuff powder distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture, high specific surface area inorganic powder, calcium carbonate powder and / or slaked lime powder, and a colloidal silica dispersion. The clay composed of the above specific composition can be prepared, for example, by blending each component and finely pulverizing it using a machine such as a pug mill Kneading with a Kneading machine and then finely pulverizing it using a pulverizer such as a decanter. The water content of the above specific composition can be about 7% to 15% by mass (it may be adjusted by adding water).

[0027] The press molding step is a step of press molding the clay prepared in the clay preparation step to obtain a press-molded body. A dry press molding machine can be preferably used as the press molding machine. The press-molded body can have a shape with surface irregularities such as a stone surface. The thickness of the press-molded body can be, for example, 8 mm or more and 25 mm or less.

[0028] The drying and hardening process is a process of obtaining a humidity control and deodorizing building material by drying and hardening a press-formed body to form a hardened body. The drying of the press-formed body may be either natural drying or forced drying using a dryer, but preferably, forced drying can be suitably employed from the viewpoint of productivity and the like. In this case, the drying temperature can be set to about 80°C to 120°C. The drying time can be set to about 6 hours to 12 hours.

[0029] The method for manufacturing the humidity control and deodorizing building material of the present embodiment described above can manufacture the humidity control and deodorizing building material of the present embodiment without firing, and can improve the productivity of the humidity control and deodorizing building material. Further, in the method for manufacturing the humidity control and deodorizing building material of the present embodiment, since the specific composition does not contain soot like plaster material, the Kneading troubles and the like are less likely to occur, which is advantageous for improving productivity.

Examples

[0030] Hereinafter, the humidity control and deodorizing building material of the present invention will be described using examples. <Raw material preparation> The following raw materials were prepared. · Powder of rhyolitic welded tuff distributed from Takasago City, Hyogo Prefecture to Kasai City, Hyogo Prefecture... Ryuzan stone powder (particle size 0.5 mm or less) · Inorganic powder with a high specific surface area... Ground horticultural Kanuma soil, zeolite (manufactured by Shin Kogyo Co., Ltd.) · Calcium carbonate powder... Primary calcium carbonate · Slaked lime (calcium hydroxide) powder... Primary calcium hydroxide · Colloidal silica dispersion (particle size 40 nm, 30% dispersion. Manufactured by Nissan Chemical Industries, Ltd.) · Additives... Fine particles of gypsum stone with a particle size of about 1 mm, oyster shell powder

[0031] <Preparation of clay> A mixture of powder of rhyolitic welded tuff, inorganic powder with a high specific surface area, calcium carbonate powder and / or slaked lime powder was prepared with a colloidal silica dispersion at the blending ratios shown in Table 1 below. KneadingEach clay was obtained in this way. When adding additives, each additive was mixed with a mixture of rhyolitic welded tuff powder, high specific surface area inorganic powder, calcium carbonate powder and / or slaked lime powder, and the resulting mixture was dispersed in a colloidal silica solution. Kneading Each clay was obtained in this way.

[0032] <Press forming> Each of the obtained clays was press-molded at a pressure of 20 to 80 tons (196 to 784 kN) using a uniaxial pressure type dry press molding machine [100-ton (980 kN) press] to obtain each press-molded body. The outer shape of the press-molded body was approximately 50 mm × 150 mm. Therefore, the pressure per unit area (m 2 ) was (2.62×10 7 N / m 2 ~10.46×10 7 N / m 2 ). The thickness of the press-molded body was approximately 15 mm. After molding, it was observed whether it was possible to remove it from the mold, and the brittleness and strength of the molded body were also observed. For the obtained test specimens 1 to 17, the evaluations described below were performed.

[0033] <Drying, curing> Each press-molded body was placed in a dryer and forcibly dried at 100 °C for 8 hours to be cured, thereby obtaining each cured body. Each of the obtained humidity control and deodorizing building materials is used as an interior humidity control and deodorizing tile.

[0034] <Evaluation> -Productivity- In the production of each of the above-mentioned test specimens, no firing was performed. Therefore, good press moldability can be obtained during the press molding of each test specimen, so the productivity can be improved by press molding. Therefore, the press moldability of each test specimen was evaluated. Specifically, when the clay adhered strongly to the mold and could not be press-molded, or when the press-molding was possible but the strength of the press-molded body was low and the press-molded body was brittle and collapsed, it was judged that the productivity was poor. When the press-molded body could be molded without such problems, it was judged that the productivity was good.

[0035] -Moisture absorption and desorption test (humidity conditioning test)- For each test specimen, a moisture absorption and desorption test was conducted in accordance with JIS A1470-1:2014 "Test Method for Moisture Absorption and Desorption of Building Materials - Part 1: Humidity Response Method". Specifically, the test specimen was placed on a general-purpose electronic balance (manufactured by A&D Company, Limited, FZ-3000i, weighing capacity 3200 g, minimum display 0.01 g) installed in a thermo-hygrostat chamber (manufactured by Espec Corporation, built-in chamber TBE-2HW5G3A). The indoor atmosphere of the thermo-hygrostat chamber was maintained at 25°C and 50% RH, and the specimen was cured until it reached a constant weight. After the curing was completed, the indoor atmosphere of the thermo-hygrostat chamber was set to 25°C and 75% RH and maintained for 12 hours, and then set to 25°C and 50% RH and maintained for 12 hours. The mass at the start of the measurement was compared with the mass after each elapsed time. Thus, the relationship between the elapsed time and the moisture absorption and desorption amount was measured for each test specimen.

[0036] -Bending strength- For each test specimen, a three-point bending test (n = 3) was conducted, and the arithmetic mean value of the obtained bending strength measurement values was taken as the bending strength. In cases where the results of productivity and moisture absorption and desorption performance were poor, the measurement of bending strength was omitted.

[0037] -Adsorption test- For each test specimen, an adsorption test of ammonia gas and formaldehyde gas was conducted. Specifically, the test specimen was placed in a 10 L gas collection bag and sealed, and then 10 L of nitrogen gas containing about 120 ppm to 150 ppm of ammonia and about 110 ppm to 125 ppm of formaldehyde was transferred to the gas collection bag, and the gas concentration was measured by the detector tube method at regular intervals.

[0038] -Deodorization test- For each test specimen, in addition to the ammonia gas and formaldehyde gas for which the above adsorption test was conducted, a deodorization functional test of isovaleric acid and acetic acid was conducted. Each test specimen was placed in a sealed container filled with ammonia gas, formaldehyde gas, isovaleric acid gas, and acetic acid gas respectively, sealed, and left at room temperature for 3 hours, and then the deodorization effect was confirmed by a sensory test. The summary of the results is shown in Table 4.

[0039] Table 1 shows the blending ratio of each composition used to prepare each test specimen, Table 2 shows the productivity, moisture absorption and desorption performance, and bending strength of each test specimen, Table 3 shows the malodorous gas adsorption effect of each test specimen, and Table 4 shows the performance of the deodorizing sensory test of each test specimen. Reference products 1 and 2 are moisture-conditioning and deodorizing building materials prepared by the methods described in Patent Documents 6 and 7, respectively. In addition, Fig. 1 shows examples of molded bodies, and Fig. 2 shows the results of the moisture absorption and desorption test of test specimen 4.

[0040] (Table 1) Composition of each test specimen JPEG0007686906000002.jpg10882

[0041] (Table 2) Performance comparison test of each test piece JPEG0007686906000003.jpg8787N.T is untested

[0042] (Table 3) Deodorizing performance test for each specimen TIFF0007686906000004.tif52108

[0043] (Table 4) Odor control test for each specimen JPEG0007686906000005.jpg3995From Tables 1 to 4 and Figures 1 to 3, the following can be seen.

[0044] Test piece 1 is made of rhyolitic tuff powder (Tatsuyama stone) and calcium carbonate and colloidal silica. Kneading , and specimen 2 is made of only inorganic powder with a high specific surface area (Kanuma soil) with calcium carbonate and colloidal silica. Kneading The specimens 3 and 4 are made of a composition containing both rhyolitic tuff powder (Tatsuyama stone) and inorganic powder with a high specific surface area, and are made of calcium carbonate and colloidal silica. Kneading Specimen 5 is a composition containing both rhyolitic tuff powder (Tatsuyama stone) and inorganic powder with a high specific surface area, which is mixed with hydrated lime and colloidal silica. KneadingIt is a formed product. Although a considerable amount of moisture absorption performance is observed in rhyolitic tuff powder (Ryuyama stone) alone, it has been found that the combination of Ryuyama stone and Kanuma soil has much higher moisture absorption performance. Furthermore, the humidity control and deodorizing building material of the present invention is made of calcium carbonate or slaked lime and colloidal silica Kneading It was found that it has much higher moisture absorption performance compared to the moisture absorption performance of reference products 1 and 2 which do not contain it. Molding with only Kanuma soil, which is an inorganic powder with a high specific surface area, could not maintain its shape. From the above results, the humidity control and deodorizing building material of the present invention formed with porous rock powder and inorganic powder with a high specific surface area using colloidal silica and calcium carbonate or slaked lime Kneading has much higher moisture absorption and desorption performance compared to conventional humidity control and deodorizing building materials, and also has good productivity. Therefore, it has become clear that it can be provided as a high-functional humidity control and deodorizing building material.

[0045] It has been found that the flexural strength is equal to or higher than that of the reference product, and it can be used as a building material.

[0046] Regarding productivity, the method of the present invention has a great advantage that it can be molded by low-pressure pressing, does not require a special mold, the molding die can be prepared by a 3D printer, and products rich in design can be produced.

[0047] In addition, it was also confirmed that Test Specimen 3, Test Specimen 4, and Test Specimen 5 of the present invention have the adsorption performance of each odor of ammonia gas and formaldehyde gas, and can further exhibit deodorizing performance.

[0048] The present invention is not limited to the above-described embodiments and examples, and various modifications are possible without departing from the gist thereof. Also, each configuration shown in each embodiment and each example can be arbitrarily combined.

Industrial Applicability

[0049] It can be used as a building material having a humidity control and deodorizing function and a method for manufacturing the same.

Claims

1. A humidity-regulating and deodorizing building material, characterized in that at least one type of porous rock powder having humidity-regulating and deodorizing functions is selected from the group consisting of powder of rhyolitic welded tuff distributed from Takasago City to Kasai City, Hyogo Prefecture, powder of natural pumice from Towada Volcano, powder of koga stone from Niijima in the Izu Islands, and powder of bakuhan stone from Shirakawa, Mino, Gifu Prefecture, and at least one type of powder selected from Kanuma soil, Akadama soil, zeolite, sepiolite, acid clay, and Oya stone, molded with a binding functional material obtained by adding calcium carbonate and / or slaked lime to colloidal silica.

2. A humidity-regulating and odor-eliminating building material as claimed in claim 1, which further comprises at least one additive selected from the group consisting of clay minerals of chlorite from Awaji Island, Hyogo Prefecture, fine granules of kansui stone from Ibaraki Prefecture, and powdered oyster shells.

3. When a material that has reached a constant weight in an atmosphere of 50% relative humidity at 25°C is brought into contact with air of 75% relative humidity at 25°C for 12 hours, the moisture absorption amount is at least 60 g / m ２ 3. The moisture-regulating and odor-eliminating building material according to claim 1 or 2,

4. A method for manufacturing a humidity-regulating and odor-eliminating building material, comprising the steps of: adding a colloidal silica dispersion to a specific composition consisting of a material mixture of at least one selected from powder of rhyolitic welded tuff distributed from Takasago City to Kasai City, Hyogo Prefecture, powder of natural pumice from Towada volcano, powder of koga stone from Niijima in the Izu Islands, and powder of Maifan stone from Shirakawa, Mino, Gifu Prefecture, and at least one powder selected from Kanuma soil, Akadama soil, zeolite, sepiolite, acidic clay, and Oya stone, or a material mixture of the material mixture to which at least one additive selected from clay minerals of chlorite from Awaji Island, Hyogo Prefecture, fine kansui stone from Ibaraki Prefecture, and powdered oyster shells, and calcium carbonate and / or hydrated lime; filling the kneaded mixture into a predetermined molding form; pressurizing and molding; and drying.

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