JP2001240457A - Humidity conditioning formed article and method for producing the same - Google Patents
Humidity conditioning formed article and method for producing the sameInfo
- Publication number
- JP2001240457A JP2001240457A JP2000054575A JP2000054575A JP2001240457A JP 2001240457 A JP2001240457 A JP 2001240457A JP 2000054575 A JP2000054575 A JP 2000054575A JP 2000054575 A JP2000054575 A JP 2000054575A JP 2001240457 A JP2001240457 A JP 2001240457A
- Authority
- JP
- Japan
- Prior art keywords
- diatomaceous earth
- humidity
- moisture
- humidity control
- calcium silicate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/18—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type
- C04B28/186—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mixtures of the silica-lime type containing formed Ca-silicates before the final hardening step
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、優れた調湿性を備
える調湿成形体及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded article having excellent humidity control properties and a method for producing the same.
【０００２】[0002]
【従来の技術】珪藻土は、単細胞藻類の珪藻遺骸が集積
してできた物質であり、多くの微細な空隙を有する細孔
構造をなす非晶質シリカを備えるので、優れた吸放湿特
性を示す。この珪藻土は、塗り壁材、タイル・レンガ、
石膏ボード等、様々な建材に添加されることでこれらの
建材の吸放湿特性の改善への寄与が期待されている。珪
藻土を利用してこれらの建材自体に調湿性を発現させる
方法として次のようなものが挙げられる。珪藻土粉末
を塗り壁材に混合して左官工法により壁面に施工する方
法、珪藻土単独或いは粘土等と混合したものを成形し
てから焼成することでタイル・レンガ状にする方法、
珪藻土をセメントに混合する方法、珪藻土粉末と石膏
とを混合して石膏ボードにする方法である。2. Description of the Related Art Diatomaceous earth is a substance formed by accumulating diatom remains of unicellular algae, and is provided with amorphous silica having a pore structure having many fine voids. Show. This diatomaceous earth is used for painted wall materials, tiles and bricks,
By being added to various building materials such as gypsum board, it is expected to contribute to the improvement of the moisture absorption / release properties of these building materials. The following methods can be used as a method for expressing the humidity control property of these building materials using diatomaceous earth. A method in which diatomaceous earth powder is mixed with a painted wall material and applied to the wall surface by the plastering method, a method in which diatomaceous earth alone or a mixture with clay or the like is molded and then fired to form a tile or brick shape,
A method of mixing diatomaceous earth with cement and a method of mixing diatomaceous earth powder and gypsum to form a gypsum board.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述し
た各々の方法では以下に示すような問題点があった。
の方法では、壁材の施工後に収縮割れが発生したり、壁
材が振動に追随できずひび割れが発生したりする。ま
た、左官工法では接着工法に比して工期が長くなる。However, each of the above methods has the following problems.
In the method of (1), shrinkage cracks occur after the wall material is applied, or cracks occur because the wall material cannot follow the vibration. Also, the plastering method requires a longer construction period than the bonding method.
【０００４】の方法では、８００℃前後の温度で焼成
するため、珪藻土の細孔構造が変化してしまい吸放湿特
性が著しく低下する。さらに、タイルの製造において８
００℃前後という焼成温度は比較的低いものであり、十
分な焼成がなされずタイルの強度が極めて低くなってし
まう。また、珪藻土は焼成によって赤褐色を呈するた
め、色彩の多様化が困難である。In the method (1), since the calcination is carried out at a temperature of about 800 ° C., the pore structure of the diatomaceous earth changes, and the moisture absorption / release characteristics are significantly reduced. In addition, 8
The sintering temperature of about 00 ° C. is relatively low, and sufficient sintering is not performed, resulting in extremely low tile strength. Further, since diatomaceous earth exhibits a reddish-brown color by firing, it is difficult to diversify colors.
【０００５】の方法では、例えば、ポルトランドセメ
ント等の水硬性原料に珪藻土粉末を混合した混合原料を
使用してコンクリートを製造することになるが、このよ
うな方法では、非晶質シリカを主成分とする珪藻土は、
セメント中のアルカリ成分とポゾラン反応を起してしま
うので、珪藻土中の細孔構造が崩れてしまい調湿性を十
分に発揮することができない。In the method (1), concrete is produced by using a mixed raw material obtained by mixing diatomaceous earth powder with a hydraulic material such as Portland cement. In such a method, amorphous silica is mainly used. Diatomaceous earth
Since a pozzolanic reaction occurs with the alkali component in the cement, the pore structure in the diatomaceous earth collapses, and the humidity control cannot be sufficiently exhibited.
【０００６】の方法では、熱や化学反応に起因する細
孔構造の破壊が起こらないので、珪藻土が本来有する吸
放湿特性を損うことはないが、石膏自身の調湿性は低い
ものであり、石膏ボードに十分な調湿性を発現させるに
は、珪藻土の添加量を多くする必要がある。しかし、珪
藻土の大量添加は石膏ボードの強度を著しく低下させて
しまう。また、石膏ボードは、その表面に密着させるボ
ード用原紙によってその強度を補っているが、吸放湿の
繰り返しにより、このボード用原紙が剥がれてしまう危
険性もある。In the method (1), since the pore structure is not destroyed due to heat or chemical reaction, the moisture absorption / desorption characteristic of diatomaceous earth is not impaired, but the moisture control of gypsum itself is low. In order to make the gypsum board exhibit sufficient humidity control, the amount of diatomaceous earth needs to be increased. However, the large addition of diatomaceous earth significantly reduces the strength of the gypsum board. Further, the strength of the gypsum board is supplemented by a board base paper adhered to the surface thereof, but there is a risk that the board base paper may be peeled off due to repeated moisture absorption and desorption.
【０００７】このように、珪藻土を用いた調湿成形体に
は様々な問題点があり、特に、調湿性の向上と強度の確
保とを両立させることは極めて困難であった。本発明
は、上記事情に鑑みてなされたもので、調湿性に優れか
つ建材として十分な強度を備えた調湿成形体の提供を目
的とする。[0007] As described above, there are various problems in the humidity control molded body using diatomaceous earth, and it has been extremely difficult to achieve both improvement of humidity control and securing of strength. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a humidity control molded article having excellent humidity control properties and having sufficient strength as a building material.
【０００８】[0008]
【課題を解決するための手段及び作用・効果】上記目的
を達成するため、請求項１の発明に係る調湿成形体は、
シリカと炭酸カルシウムとを主成分とする調湿成形体で
あって、その成形体中に珪藻土を成因とするシリカ成分
を１〜３０重量％含有している構成としており、特に、
主成分がケイ酸カルシウム化合物又は／及び水酸化カル
シウムの粉粒体に珪藻土の粉粒体を混合してなる混合粉
粒体を加圧成形し、炭酸ガスによって反応硬化させるこ
とで、珪藻土を成因とするシリカ成分が１〜３０重量％
含有している構成とする（請求項２の発明）。Means for Solving the Problems and Actions / Effects To achieve the above object, a humidity control molded article according to the first aspect of the present invention comprises:
It is a humidity control molded product containing silica and calcium carbonate as main components, wherein the molded product contains 1 to 30% by weight of a silica component originating from diatomaceous earth.
A diatomaceous earth is formed by pressing and forming a mixed powder obtained by mixing a diatomaceous earth powder with a calcium silicate compound or / and calcium hydroxide powder and a carbon dioxide gas. 1 to 30% by weight of the silica component
(The invention of claim 2).
【０００９】このような調湿成形体は、ケイ酸カルシウ
ム化合物又は／及び水酸化カルシウムを主成分とする粉
粒体と、これに対して２〜３０重量％となる珪藻土の粉
粒体とを混合して成形し、炭酸ガスによって反応硬化さ
せることにより製造できる（請求項３の発明）。[0009] Such a moisture-conditioning molded article is composed of a granule containing a calcium silicate compound and / or calcium hydroxide as a main component and a diatomaceous earth granule in an amount of 2 to 30% by weight based on the powder. It can be manufactured by mixing, molding and reaction-hardening with carbon dioxide gas (the invention of claim 3).
【００１０】また、このとき、ケイ酸カルシウム化合物
を主成分とする粉粒体として、軽量気泡コンクリート粒
子を用いるものであってもよい（請求項４の発明）。さ
らに、この製造方法において、炭酸ガスの濃度が３％以
上の雰囲気で反応硬化させることが好ましい（請求項５
の発明）。[0010] At this time, lightweight cellular concrete particles may be used as the powder mainly composed of a calcium silicate compound (the invention of claim 4). Further, in this manufacturing method, it is preferable to carry out the reaction hardening in an atmosphere having a carbon dioxide gas concentration of 3% or more.
Invention).
【００１１】本発明に係る調湿成形体によれば、製造工
程において、珪藻土に熱や化学反応を起因とする細孔構
造の破壊が生じないので、珪藻土の吸放湿特性が損われ
ず、成形体全体として優れた調湿性を発揮する。また、
炭酸ガスを用いて反応硬化させることによって、調湿成
形体中に炭酸カルシウムが生成するから、これが調湿成
形体を構成する粒子間の結合を強化して十分な強度を備
えることが可能となる。According to the humidity control molded article of the present invention, the pore structure of the diatomaceous earth is not destroyed due to heat or a chemical reaction in the production process, so that the moisture absorption and desorption characteristics of the diatomaceous earth are not impaired. Exhibits excellent humidity control as a whole molded article. Also,
By performing reaction hardening using carbon dioxide gas, calcium carbonate is generated in the humidity-conditioning molded body, and this strengthens the bonding between the particles constituting the humidity-conditioning molded body, thereby providing sufficient strength. .
【００１２】[0012]
【発明の実施の形態】本発明の調湿成形体における原料
の主成分であるケイ酸カルシウム化合物は、トバモライ
ト、ゾノトライト、フォシャジャイト、ヒブレンタイ
ト、ＣＳＨ等のケイ酸カルシウム水和物ならびにウォラ
ストナイト、セメント鉱物γ−Ｃ2Ｓ、スラグ等のケイ
酸カルシウムを主成分に含むものである。BEST MODE FOR CARRYING OUT THE INVENTION The calcium silicate compound which is the main component of the raw material in the molded article of the present invention is a calcium silicate hydrate such as tobermorite, zonotolite, fosharite, hybrentite, CSH and the like, and wollastonite. , Cement mineral γ-C2S, calcium silicate such as slag as a main component.
【００１３】また、これらを含む原料を具体的に示す
と、水和合成又は水熱合成したケイ酸カルシウム水和
物、普通・早強・中庸・白色等のポルトランドセメン
ト、及び、これらを成分に含むコンクリート・軽量気泡
コンクリート（ＡＬＣ）などが挙げられる。また、これ
らの破砕材・切削屑等の廃材を用いてもよい。そして、
調湿成形体の原料には、これらを単独で又は２種以上の
混合物として使用できる。[0013] The raw materials containing these are concretely described. Calcium silicate hydrate synthesized by hydration or hydrothermal synthesis, Portland cement of ordinary, early strength, moderate, white, etc., and these as components Concrete and lightweight cellular concrete (ALC). Further, waste materials such as crushed materials and cutting chips may be used. And
These can be used alone or as a mixture of two or more of them as the raw material of the humidity control molded body.
【００１４】また、調湿成形体の原料として、水酸化カ
ルシウムを単独又は上記ケイ酸カルシウム化合物と混合
して使用することができる。水酸化カルシウムを含む場
合に、原料としては酸化カルシウムを使用し、上記ケイ
酸カルシウム化合物原料と混合し、加水によって水酸化
カルシウムとすることで水酸化カルシウムを得るように
してもよい。Calcium hydroxide can be used alone or as a mixture with the above-mentioned calcium silicate compound as a raw material of the humidity control molded product. When calcium hydroxide is included, calcium hydroxide may be used as a raw material, mixed with the above-mentioned calcium silicate compound raw material, and converted into calcium hydroxide by water to obtain calcium hydroxide.
【００１５】また、ケイ酸カルシウム化合物を主成分と
する原料を粉粒体とするときにおける粒径は、その後の
工程である加圧成形・炭酸養生を経て製造された調湿成
形体の物性への影響を鑑みて、粒径を１ｍｍ〜０．１μ
ｍの範囲内とするのが望ましい。粒径が１ｍｍ以上の場
合には、加圧成形しても空隙が大きくなり、炭酸化反応
後の強度が低くなる。一方、０．１μｍ以下の場合に
は、加圧成形物が緻密になりすぎ、炭酸化反応の際に材
料内部まで炭酸ガスが浸透せず表層部のみが硬化して十
分な強度が得られないからである。The particle size when the raw material containing a calcium silicate compound as a main component is made into a powdery material is determined by the physical properties of the moisture-conditioning molded product produced through the subsequent steps of pressure molding and carbonation curing. In consideration of the effect of
m. When the particle size is 1 mm or more, the voids become large even after pressure molding, and the strength after the carbonation reaction decreases. On the other hand, when it is 0.1 μm or less, the pressure-molded product becomes too dense, and carbonic acid gas does not penetrate to the inside of the material during the carbonation reaction, and only the surface layer portion is hardened, and sufficient strength cannot be obtained. Because.
【００１６】これらケイ酸カルシウム化合物を含む原料
のうち、特に好ましいものは、トバモライトを主成分と
したＡＬＣである。ＡＬＣは多孔性であり、粉粒体とし
た場合、その粒径にもよるが、４０〜８０％の空隙を有
する。この空隙は加圧成形において減少するが、それで
も２５〜６０％の空隙が残存するので、炭酸養生する際
に炭酸ガスが材料内部まで効率的に進行する。また、Ａ
ＬＣの主成分であるトバモライトは、他のケイ酸カルシ
ウムとは異なり、炭酸養生による比表面積の増加が著し
く、それ自身が吸放湿性能の優れた材質になる。ケイ酸
カルシウムは炭酸化によって炭酸カルシウムと非晶質シ
リカに変化し、特にＡＬＣのトバモライトでは、この非
晶質シリカ、カルサイトおよび非常に微細な細孔を持つ
炭酸カルシウム結晶バテライトが生成するため、著しい
比表面積増大があり、吸放湿性能の優れた材質となると
思われる。Among these raw materials containing a calcium silicate compound, a particularly preferable one is ALC containing tobermorite as a main component. ALC is porous and has a void of 40 to 80%, depending on the particle size when powdered. These voids are reduced in the pressure molding, but still 25 to 60% of the voids remain, so that the carbon dioxide gas efficiently advances to the inside of the material during carbonation curing. Also, A
Unlike other calcium silicates, tobermorite, which is a main component of LC, has a remarkable increase in specific surface area due to carbonation curing, and is itself a material having excellent moisture absorption / release performance. Calcium silicate is converted into calcium carbonate and amorphous silica by carbonation, and especially in ALC tobermorite, this amorphous silica, calcite, and calcium carbonate crystal vaterite having very fine pores are formed. There is a remarkable increase in specific surface area, and it is considered that the material has excellent moisture absorption / release performance.
【００１７】本発明では上記した原料に加えて、さらに
珪藻土を原料として用いる。珪藻土は、主成分が非晶質
シリカであり、元来多くの微細な空隙を有する細孔構造
を備えており、優れた吸放湿性能を示す。珪藻土は、製
造後の調湿成形体中においても細孔構造を維持すること
で調湿性を向上させる。また、珪藻土に、極めて微細な
細孔構造を備えるクリストバライトを含有するもの（産
出地によってその含有量は異なる）を用いることで、さ
らなる調湿性の向上が可能となる。In the present invention, diatomaceous earth is used as a raw material in addition to the above raw materials. Diatomaceous earth is mainly composed of amorphous silica, has a pore structure having many fine voids, and exhibits excellent moisture absorption / release performance. Diatomaceous earth improves humidity control properties by maintaining a pore structure even in a humidity control molded product after production. Further, the use of diatomaceous earth containing cristobalite having an extremely fine pore structure (the content varies depending on the place of origin) enables further improvement in humidity control.
【００１８】発明者らの研究によれば、珪藻土を成因と
するシリカ成分が１〜３０重量％となるようにされてい
ることが必要である。そのシリカ成分が１重量％では珪
藻土を入れた効果が発揮できず、高湿域での調湿性の向
上は望めない。その一方、３０重量％を越えると、珪藻
土は調湿成形体中において他の原料に対する結合力が弱
いので、調湿成形体の強度が低下するためである。よ
り、好ましくは珪藻土を成因とするシリカ成分が１．８
〜２８重量％の範囲となるようにすることがよい。According to the study of the inventors, it is necessary that the silica component originating from diatomaceous earth should be 1 to 30% by weight. When the silica component is 1% by weight, the effect of adding diatomaceous earth cannot be exerted, and improvement in humidity control in a high humidity region cannot be expected. On the other hand, if it exceeds 30% by weight, diatomaceous earth has a weak bonding force to other raw materials in the humidity control molded product, so that the strength of the humidity control product decreases. More preferably, the silica component originating from diatomaceous earth is 1.8.
It is preferable that the content be in the range of ２８28% by weight.
【００１９】珪藻土を成因とするシリカ成分が上述の範
囲になるようにするには、炭酸硬化反応の重量増加を考
慮すると、原料段階で、ケイ酸カルシウム化合物又は／
及び水酸化カルシウムを主成分とする粉粒体に対して珪
藻土が２〜３０重量％ととなるように添加することにな
る。また、添加する珪藻土の粒径は特に限定はないが、
１０ｍｍ〜１μｍの範囲とするのが好ましい。珪藻土の
粒径が１０ｍｍ以上では局所的に脆弱な部分が存在して
全体の強度が低下する傾向を呈するからであり、１μｍ
以下だと調湿成形体が粉っぽくなるため、商品性が低下
するからである。とりわけ、珪藻土の粒径を５ｍｍ以下
とした場合に強度を著しく高くできる。In order for the silica component originating from diatomaceous earth to fall within the above-mentioned range, the calcium silicate compound or /
And diatomaceous earth is added so as to be 2 to 30% by weight with respect to the powder and granules mainly containing calcium hydroxide. The particle size of the diatomaceous earth to be added is not particularly limited,
It is preferable that the thickness be in the range of 10 mm to 1 μm. If the particle size of the diatomaceous earth is 10 mm or more, there is a locally weak portion, which tends to reduce the overall strength.
This is because if it is less than the above, the humidity-conditioning molded body becomes powdery, and the commercial value is reduced. In particular, when the particle size of the diatomaceous earth is 5 mm or less, the strength can be significantly increased.
【００２０】そして、上記したこれらの原料を混合して
混合粉粒体とする。尚、この混合粉粒体には、脆性改
善、強度増加、意匠性付加を目的として種々の繊維、骨
材、顔料を添加してもよい。ただし、その添加量はそれ
ぞれ１０％以内に抑えるのが望ましい。加圧成形は、混
合粉粒体を乾燥あるいは含水状態さらには水性スラリー
の状態で成形型に入れ、加圧下で成形するようにして行
い、これにより加圧成形体を得る。Then, these raw materials are mixed to form a mixed powder. Various fibers, aggregates, and pigments may be added to the mixed powder for the purpose of improving brittleness, increasing strength, and adding design properties. However, it is desirable that the amount of each addition be kept within 10%. The pressure molding is carried out by placing the mixed powder or granules in a dry or water-containing state or an aqueous slurry state in a molding die and molding under pressure, thereby obtaining a pressure-molded body.
【００２１】加圧成形は、特に限定はないが、押出成
形、抄造プレス成形、脱水プレス成形、紛体プレス成
形、連続プレス成形等が適用できる。ただし、加圧成形
体は、その後の工程における取り扱い上の便宜も考慮す
ると、曲げ強さで０．２ＭＰａ以上の強度があるのが望
ましい。しかし、加圧成形体の強度が上記した強度
（０．２ＭＰａ）以上にならない場合は、後述する炭酸
養生における炭酸化反応を加圧成形と同時に完全に又は
一部行い加圧成形体の取り扱いに必要な強度を確保する
ことが望ましい。混合粉粒体を含水状態又は水性スラリ
ーの状態で加圧成形する場合において、それに含まれて
いる水分が加圧成形の工程において成形型へ流し込むた
めに必要な流動性の確保、加圧成形体におけるバインダ
ーとしての役割、及び後述する炭酸養生における炭酸化
反応の促進に寄与する。また、混合粉粒体を乾燥した粉
粒体のままの状態で加圧成形する場合においては、加圧
成形工程後の成形体に噴霧等により水分を与えることに
より炭酸養生における炭酸化反応を促進させることにな
り好ましい。The pressure molding is not particularly limited, but extrusion molding, papermaking press molding, dehydration press molding, powder press molding, continuous press molding and the like can be applied. However, the pressure-molded body preferably has a bending strength of 0.2 MPa or more in consideration of convenience in handling in the subsequent steps. However, when the strength of the press-formed body does not exceed the above strength (0.2 MPa), the carbonation reaction in the carbonation curing described later is performed completely or partially simultaneously with the press forming, and the handling of the press-formed body is performed. It is desirable to secure the necessary strength. In the case where the mixed powder is subjected to pressure molding in a water-containing state or an aqueous slurry state, it is necessary to ensure the fluidity necessary for the water contained therein to flow into a molding die in the pressure molding step. In the present invention, it contributes to a role as a binder and to promotion of a carbonation reaction in carbonation curing described later. In the case where the mixed powder and granules are subjected to pressure molding in the state of dried powders and granules, the carbonation reaction in carbonation curing is promoted by giving water to the molded body after the pressure molding step by spraying or the like. This is preferable.
【００２２】炭酸養生は、加圧成形体を容器中に密閉
し、炭酸ガス濃度を３％以上の雰囲気に保持して加圧成
形体を炭酸化することにより行い、これにより炭酸硬化
体が得られる。ここで、炭酸ガス濃度は、高ければ高い
ほど急速に反応が進むため可能な限り高濃度にするのが
望ましい。炭酸ガス濃度が３％以下では、炭酸化が著し
く遅くなり１週間以上かかるため工業的でない。また、
このときの容器中の温度は、特に限定しないが、材料中
の水分が存在する状態、すなわち０℃以上１００℃以下
が好ましい。炭酸養生において、特に炭酸化反応が促進
するのは３０〜８０℃であるが、炭酸化反応は発熱を伴
ない、加圧成形体の温度は上昇するため、開始時におけ
る容器内の温度はおおよそ６０℃以下とするのが望まし
い。また、炭酸養生中の圧力も反応速度に大きく影響す
る。圧力が高ければ高いほど反応が促進するが、工業的
には２ＭＰａ以下で行うのが好ましい。Carbonation curing is carried out by sealing the press-molded body in a container and carbonizing the press-molded body while maintaining the carbon dioxide gas concentration in an atmosphere of 3% or more, thereby obtaining a carbonic acid cured body. Can be Here, the carbon dioxide gas concentration is desirably as high as possible because the higher the concentration, the faster the reaction proceeds. When the concentration of carbon dioxide is 3% or less, carbonation is extremely slow and takes one week or more, which is not industrial. Also,
The temperature in the container at this time is not particularly limited, but is preferably in a state where moisture in the material is present, that is, 0 ° C or more and 100 ° C or less. In the carbonation curing, the carbonation reaction is particularly accelerated at 30 to 80 ° C., but the carbonation reaction is accompanied by heat generation and the temperature of the press-formed body rises. The temperature is desirably 60 ° C. or lower. The pressure during carbonation also has a significant effect on the reaction rate. The higher the pressure, the more the reaction is promoted. However, industrially, the reaction is preferably performed at 2 MPa or less.
【００２３】さらに、炭酸養生において炭酸化反応を効
率的に行うには、容器内への炭酸ガスの流入に先立ち予
め容器内を真空にする真空工程を設けることで、加圧成
形体中の空気を抜く。この工程の後に高濃度の炭酸ガス
を容器内へ流入させるといった方法が適用できる。Further, in order to carry out the carbonation reaction efficiently in the carbonation curing, a vacuum step for evacuating the inside of the container is provided before the inflow of the carbon dioxide gas into the container, so that the air in the pressurized molded body is provided. Pull out. After this step, a method of flowing high-concentration carbon dioxide gas into the container can be applied.
【００２４】尚、炭酸養生に使用する炭酸ガスとして
は、市販のガスの他にボイラー等の排ガスを利用するこ
とができる。排ガスを利用する場合には、脱硫、脱硝、
集塵をしたものを使用するのが好ましい。そして、炭酸
養生により得られた炭酸硬化体は、必要に応じて乾燥さ
せることで、調湿成形体が得られる。As the carbon dioxide gas used for carbonation curing, not only a commercially available gas but also an exhaust gas from a boiler or the like can be used. When using exhaust gas, desulfurization, denitration,
It is preferable to use those that have collected dust. The carbonized cured product obtained by the carbonation curing is dried as necessary to obtain a humidity control molded product.
【００２５】[0025]
【実施例】以下、上記実施形態に基づいて製造した本発
明の実施例を説明する。本実施例に係る調湿成形体は、
ＡＬＣの切削紛と珪藻土の粉砕物とを原料に用いて製造
した。これらの原料を混合したものを混合粉粒体とし、
混合粉粒体中に含有する珪藻土の割合を表１に示すよう
にして、実施例１〜７の調湿成形体を製造した。EXAMPLES Examples of the present invention manufactured based on the above embodiment will be described below. The humidity control molded article according to the present embodiment is:
It was manufactured using ALC cutting powder and pulverized diatomaceous earth as raw materials. A mixture of these raw materials is used as a mixed powder,
The moisture control molded articles of Examples 1 to 7 were manufactured by setting the ratio of the diatomaceous earth contained in the mixed powder and granular material as shown in Table 1.
【００２６】[0026]
【表１】 [Table 1]
【００２７】ＡＬＣ切削紛は、周知のＡＬＣを粒径が
０．５ｍｍ以下となるように造粒したものを用いた。ま
た、珪藻土は稚内産のものを用い、各実施例について粒
径を表１に示す値に造粒した。この混合粉粒体に水を加
えて均質に混合してから、型枠に流し込み、２０ＭＰａ
の圧力でプレス成形し成形体を得た。尚、型枠は、縦×
横が３００ｍｍ×３００ｍｍの正方形筒状のものを用
い、成形体の厚さが８ｍｍとなるように各実施例をプレ
ス成形した。As the ALC cutting powder, a well-known ALC granulated so as to have a particle size of 0.5 mm or less was used. The diatomaceous earth used was from Wakkanai, and the particle diameter was granulated to the values shown in Table 1 for each example. Water is added to the mixed powder and uniformly mixed, and then poured into a mold, and the pressure is reduced to 20 MPa.
Press molding was performed under the following pressure to obtain a molded body. In addition, the formwork is vertical ×
Each of the examples was press-formed using a square tube having a width of 300 mm x 300 mm and the thickness of the formed body was 8 mm.
【００２８】続いて、この成形体を炭酸養生した。炭酸
養生は、成形体を密閉容器の中に入れ、真空ポンプで容
器内の脱気をした後、市販の炭酸ガスを密閉容器内に導
入し、０．５ＭＰａの圧力で２時間保持して行った。こ
の後、炭酸養生した成形体を１０５℃で乾燥させること
で各実施例の調湿成形体を製造した。Subsequently, the molded body was carbonated. Carbonation curing is performed by placing the molded body in a closed container, degassing the inside of the container with a vacuum pump, introducing a commercially available carbon dioxide gas into the closed container, and holding at a pressure of 0.5 MPa for 2 hours. Was. Thereafter, the molded body subjected to carbonate curing was dried at 105 ° C. to produce a moisture-conditioned molded body of each example.
【００２９】製造後の各実施例における珪藻土の含有率
は、炭酸化による重量増加分を加味すると、表１に示す
値となる。尚、上記実施例と同様にして比較例を製造し
た。比較例は、混合粉粒体に含まれる珪藻土の割合また
は混合する珪藻土の粒径を表１に示すように変えて製造
したものである。The content of diatomaceous earth in each of the examples after production takes the values shown in Table 1 in consideration of the weight increase due to carbonation. A comparative example was manufactured in the same manner as in the above example. The comparative example was manufactured by changing the ratio of the diatomaceous earth contained in the mixed granular material or the particle size of the diatomaceous earth to be mixed as shown in Table 1.
【００３０】このように製造した実施例及び比較例につ
いて、調湿性能の評価及び曲げ強度の測定を行った。 ［調湿性能］調湿性能の評価は、各実施例及び各比較例
について縦×横のサイズを１００ｍｍ×１００ｍｍとし
た調湿試験片を用意し、この調湿試験片の６面のうち１
００ｍｍ×１００ｍｍの大きさの１面以外の他の５面を
アルミテープで覆い、この１面のみから吸放湿させるよ
うにする。そして、この試験片を恒温恒湿槽内に密閉
し、温度を２３℃に保ち、相対湿度５３％〜７５％の中
湿域と相対湿度７５％〜９３％の高湿域とにおいて、調
湿試験片の重量変化から吸放湿量を測定した。With respect to the examples and comparative examples manufactured as described above, evaluation of humidity control performance and measurement of bending strength were performed. [Humidity Control Performance] Humidity control performance was evaluated by preparing a humidity control test piece having a size of 100 mm × 100 mm in length and width for each of the examples and comparative examples.
The other five surfaces other than one surface having a size of 00 mm × 100 mm are covered with aluminum tape, and moisture is absorbed and released from only one surface. The test piece was sealed in a thermo-hygrostat, kept at a temperature of 23 ° C., and conditioned in a moderate humidity range of 53% to 75% relative humidity and a high humidity range of 75% to 93% relative humidity. The amount of moisture absorbed and released was measured from the weight change of the test piece.
【００３１】中湿域の測定を以下のようにして行った。
まず、吸放湿量の測定に先立ち、調湿試験片を相対湿度
を５３％に保持して２週間以上静置させることで十分に
吸湿させてそれ以上重量変化が起こらない平衡含湿状態
とした。次に、平衡含湿状態から槽内の相対湿度を７５
％として２４時間保持し、この間の増加した重量から吸
湿量を測定した。吸湿量を測定した後、相対湿度を５３
％として２４時間保持し、この間の減少した重量から放
湿量を測定した。The measurement in the middle humidity range was performed as follows.
First, prior to the measurement of the amount of absorbed and released moisture, the humidity control test specimen was allowed to stand at a relative humidity of 53% for at least 2 weeks to allow sufficient moisture absorption to achieve an equilibrium moisture-containing state in which no further weight change occurs. did. Next, the relative humidity in the tank was set to 75 from the equilibrium wet state.
% For 24 hours, and the amount of moisture absorption was measured from the increased weight during this period. After measuring the moisture absorption, the relative humidity was increased to 53
% Was held for 24 hours, and the amount of moisture released was measured from the weight lost during this period.
【００３２】また、高湿域の測定も上記の中湿域の測定
と同様にして行った。まず、調湿試験片を相対湿度を７
５％に保持して２週間以上静置させて平衡含湿状態とし
てから、槽内の相対湿度を９３％として２４時間保持し
て吸湿量を測定し、この後、相対湿度を７５％として２
４時間保持して放湿量を測定した。このようにして得ら
れた吸放湿量を表１に示した。The measurement in the high humidity area was performed in the same manner as the measurement in the middle humidity area. First, the humidity control specimen was adjusted to a relative humidity of 7
After maintaining at 5% and allowing to stand for 2 weeks or more to obtain an equilibrium moisture-containing state, the relative humidity in the tank was maintained at 93% for 24 hours, and the amount of moisture absorption was measured.
After holding for 4 hours, the amount of released moisture was measured. Table 1 shows the moisture absorption and desorption amounts thus obtained.
【００３３】［曲げ強度］一方、曲げ強度の測定は、Ｊ
ＩＳ規格Ｒ１６０１の「３点曲げ強度試験方法」に準ず
る方法で行った。但し、試験片については各実施例及び
各比較例のものを縦×横を２５ｍｍ×１００ｍｍ（厚さ
８ｍｍ）とした強度試験片を用いた。そして、軸状の支
点を２本用意し、所定間隔を開けて平行に並べ、強度試
験片の長手方向で両支点を橋渡すようにして置き、支点
間の中央の１点に荷重をかけて行った。このとき、両支
点間の間隔（スパン）は８０ｍｍ、載荷速度は０．１ｍ
ｍ／ｍｉｎ．として測定し、得られた結果を表１に示し
た。尚、この曲げ強度測定は、インストロン試験機を用
いて行った。[Bending strength] On the other hand, the bending strength was measured according to J
The test was performed according to the IS standard R1601 “3 point bending strength test method”. However, as for the test piece, a strength test piece having a size of 25 mm × 100 mm (8 mm in thickness) was used for each of Examples and Comparative Examples. Then, two shaft-like fulcrums are prepared, arranged in parallel at a predetermined interval, placed so as to bridge both fulcrums in the longitudinal direction of the strength test piece, and a load is applied to one central point between the fulcrums. went. At this time, the interval (span) between both fulcrums is 80 mm, and the loading speed is 0.1 m.
m / min. And the obtained results are shown in Table 1. In addition, this bending strength measurement was performed using the Instron testing machine.
【００３４】これらの結果から、珪藻土を含有しない比
較例１に比べて、中湿域、高湿域の双方の範囲で、調湿
性の向上が見られた。特に、高湿域の範囲では調湿性の
向上が顕著である。これは、比較例１にも含まれるケイ
酸カルシウムを起源とする非晶質シリカと炭酸カルシウ
ムが中湿域の調湿性に優れ、珪藻土が高湿域の調湿性に
優れるからであると考えられるからであり、各実施例に
おいて、珪藻土の添加量に比例して高湿域の調湿性が著
しく向上していることからも裏付けられる。それと同時
に、本実施例における強度は、建築材料として十分な強
度も備えていることが判明した。尚、珪藻土の含有率が
１０％のものについて珪藻土の粒径を変えて製造した試
験によれば、粒径を５ｍｍ以下とすれば、調湿成形体の
強度を著しく高くすることができることが判明した（実
施例３、６、７参照）。表１には示していないが、粒径
が５〜１０ｍｍの範囲の珪藻土を使用した場合には曲げ
強度において多少劣るものの十分な調湿性が得られた。From these results, it was found that the humidity control property was improved in both the middle humidity range and the high humidity range as compared with Comparative Example 1 containing no diatomaceous earth. In particular, in the high humidity range, the improvement of the humidity control is remarkable. This is considered to be because amorphous silica and calcium carbonate derived from calcium silicate also included in Comparative Example 1 are excellent in humidity control in a middle humidity region, and diatomaceous earth is excellent in humidity control in a high humidity region. This is supported by the fact that in each of the examples, the humidity control in the high humidity region is significantly improved in proportion to the amount of diatomaceous earth added. At the same time, it was found that the strength in this example also had sufficient strength as a building material. According to a test in which the diatomaceous earth content was 10% and the particle diameter of the diatomaceous earth was changed, it was found that if the particle diameter was 5 mm or less, the strength of the humidity control molded article could be significantly increased. (See Examples 3, 6, and 7). Although not shown in Table 1, when diatomaceous earth having a particle size in the range of 5 to 10 mm was used, sufficient humidity control was obtained although bending strength was somewhat inferior.
【００３５】このように、本実施例に係る調湿成形体に
よれば、ケイ酸カルシウム化合物を主成分とするＡＬＣ
と珪藻土との粉粒体を混合してから製造しており、製造
工程において、珪藻土に熱や化学反応を起因とする細孔
構造の破壊が生じないので、珪藻土の吸放湿特性が損わ
れない。さらに、炭酸養生によって、調湿成形体中に炭
酸カルシウム及びシリカゲルが生成する。As described above, according to the humidity control molded article of this embodiment, the ALC containing a calcium silicate compound as a main component is used.
And diatomaceous earth are mixed and manufactured, and in the manufacturing process, the diatomaceous earth does not break down the pore structure due to heat or chemical reaction, so the moisture absorption and desorption characteristics of diatomite are impaired Absent. Further, calcium carbonate and silica gel are formed in the moisture-conditioned molded article by the carbonation curing.
【００３６】これにより、調湿成形体には、珪藻土を起
源とする非晶質シリカを含有すると共に、ケイ酸カルシ
ウムを起源とする非晶質シリカと炭酸カルシウムとを含
有し、これらは、いずれも良好な吸放湿性能を示す。そ
れに加えて、炭酸カルシウムが調湿成形体を構成する粒
子間の結合を強化する。Thus, the humidity control molded article contains amorphous silica originating from diatomaceous earth, amorphous silica originating from calcium silicate, and calcium carbonate. Also show good moisture absorption / desorption performance. In addition, the calcium carbonate strengthens the bonds between the particles constituting the humidity control molded article.
【００３７】従って、本発明によれば、調湿性に優れか
つ建材として十分な強度を備えることが可能となった。Therefore, according to the present invention, it is possible to provide excellent humidity control and sufficient strength as a building material.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） // Ｃ０４Ｂ 111:72 Ｃ０４Ｂ 111:72 (72)発明者 寺村 敏史 愛知県尾張旭市下井町下井2035番地 株式 会社建材テクノ研究所内 (72)発明者 井須 紀文 愛知県尾張旭市下井町下井2035番地 株式 会社建材テクノ研究所内 (72)発明者 稲垣 憲次 愛知県尾張旭市下井町下井2035番地 株式 会社建材テクノ研究所内 (72)発明者 平林 克彦 愛知県尾張旭市下井町下井2035番地 株式 会社建材テクノ研究所内 (72)発明者 高木 光明 大阪府豊中町新千里西町１丁目１番４号 ナショナル住宅産業株式会社内 (72)発明者 杉本 和行 大阪府豊中町新千里西町１丁目１番４号 ナショナル住宅産業株式会社内 (72)発明者 安田 哲夫 大阪府豊中町新千里西町１丁目１番４号 ナショナル住宅産業株式会社内 (72)発明者 守川 正信 大阪府豊中町新千里西町１丁目１番４号 ナショナル住宅産業株式会社内 (72)発明者 長澤 貫太郎 大阪府豊中町新千里西町１丁目１番４号 ナショナル住宅産業株式会社内 Ｆターム(参考） 4G012 PA03 PA05 PA14 PA30 PC11 PE03 PE07 RA02 4G054 AA01 BA32 BA62 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) // C04B 111: 72 C04B 111: 72 (72) Inventor Toshifumi Teramura 2035 Shimoimachi, Shioimachi, Owariasahi-shi, Aichi Pref. Inside the Building Materials Techno Laboratory (72) Inventor Kibumi Isu 2035 Shimoi-machi, Shioimachi, Owariasahi City, Aichi Pref. (72) Inventor Katsuhiko Hirabayashi 2035 Shimoi-machi, Shioi-machi, Owariasahi-shi, Aichi Pref. ) Inventor Kazuyuki Sugimoto 1-4-1 Shinsenri Nishimachi, Toyonaka-cho, Osaka National housing industry (72) Inventor Tetsuo Yasuda 1-1-4 Shinsenri-Nishimachi, Toyonaka-cho, Osaka Prefecture National Housing Industry Co., Ltd. (72) Inventor Masanobu Morikawa 1-1-4-1 Shinsenri-Nishimachi, Toyonaka-cho, Osaka National Inside the Housing Industry Co., Ltd. (72) Inventor Kantaro Nagasawa 1-4-1 Shinsenri Nishimachi, Toyonaka-cho, Osaka Prefecture F-term within the National Housing Industry Co., Ltd. (reference)
Claims (5)
る調湿成形体であって、その成形体中に珪藻土を成因と
するシリカ成分を１〜３０重量％含有していることを特
徴とする調湿成形体。1. A moisture-conditioning molded product containing silica and calcium carbonate as main components, characterized in that the molded product contains 1 to 30% by weight of a silica component originating from diatomaceous earth. Humidity control molding.
及び水酸化カルシウムの粉粒体に珪藻土の粉粒体を混合
してなる混合粉粒体を加圧成形し、炭酸ガスによって反
応硬化させることで、珪藻土を成因とするシリカ成分が
１〜３０重量％含有されていることを特徴とする調湿成
形体。2. The method according to claim 1, wherein the main component is a calcium silicate compound and / or
And a mixture of granules of diatomaceous earth mixed with granules of calcium hydroxide is press-molded, and reaction-hardened with carbon dioxide gas, whereby a silica component originating from diatomaceous earth is 1 to 30% by weight. %. A moisture-conditioning molded article characterized by containing
化カルシウムを主成分とする粉粒体と、これに対して２
〜３０重量％となる珪藻土の粉粒体と混合して加圧成形
し、炭酸ガスによって反応硬化させることを特徴とする
調湿成形体の製造方法。3. A powder having a calcium silicate compound and / or calcium hydroxide as a main component, and
What is claimed is: 1. A method for producing a humidity-conditioning molded body, comprising mixing with diatomaceous earth particles of up to 30% by weight, press-molding, and reaction-hardening with carbon dioxide gas.
する粉粒体が軽量気泡コンクリート粒子であることを特
徴とする請求項３に記載の調湿成形体の製造方法。4. The method according to claim 3, wherein the granules containing the calcium silicate compound as a main component are lightweight cellular concrete particles.
で反応硬化させることを特徴とする請求項３または請求
項４に記載の調湿成形体の製造方法。5. The method according to claim 3, wherein the curing is performed in an atmosphere in which the concentration of the carbon dioxide gas is 3% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000054575A JP2001240457A (en) | 2000-02-29 | 2000-02-29 | Humidity conditioning formed article and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000054575A JP2001240457A (en) | 2000-02-29 | 2000-02-29 | Humidity conditioning formed article and method for producing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001240457A true JP2001240457A (en) | 2001-09-04 |
Family
ID=18575810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000054575A Abandoned JP2001240457A (en) | 2000-02-29 | 2000-02-29 | Humidity conditioning formed article and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001240457A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004143019A (en) * | 2002-10-28 | 2004-05-20 | Shimizu Corp | Cement hardening material, cement hardened body, concrete placing mold and concrete structure |
| JP2004269282A (en) * | 2003-03-05 | 2004-09-30 | Sekisui Chem Co Ltd | Composition for hardened material, inorganic hardened material, and hardened material hardened by carbonation |
| JP2005187324A (en) * | 2003-01-15 | 2005-07-14 | Sekisui Chem Co Ltd | Carbonated hardened body |
| JP2007031267A (en) * | 2005-06-20 | 2007-02-08 | Asahi Kasei Construction Materials Co Ltd | Hydraulic composition, and method for producing humidity conditioning building material |
-
2000
- 2000-02-29 JP JP2000054575A patent/JP2001240457A/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004143019A (en) * | 2002-10-28 | 2004-05-20 | Shimizu Corp | Cement hardening material, cement hardened body, concrete placing mold and concrete structure |
| JP2005187324A (en) * | 2003-01-15 | 2005-07-14 | Sekisui Chem Co Ltd | Carbonated hardened body |
| JP2004269282A (en) * | 2003-03-05 | 2004-09-30 | Sekisui Chem Co Ltd | Composition for hardened material, inorganic hardened material, and hardened material hardened by carbonation |
| JP2007031267A (en) * | 2005-06-20 | 2007-02-08 | Asahi Kasei Construction Materials Co Ltd | Hydraulic composition, and method for producing humidity conditioning building material |
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