JP2003081671A - Calcium silicate hydrate slurry - Google Patents
Calcium silicate hydrate slurryInfo
- Publication number
- JP2003081671A JP2003081671A JP2001269068A JP2001269068A JP2003081671A JP 2003081671 A JP2003081671 A JP 2003081671A JP 2001269068 A JP2001269068 A JP 2001269068A JP 2001269068 A JP2001269068 A JP 2001269068A JP 2003081671 A JP2003081671 A JP 2003081671A
- Authority
- JP
- Japan
- Prior art keywords
- calcium silicate
- silicate hydrate
- hydrate slurry
- raw material
- slurry
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】
【解決手段】 石灰質原料及びケイ酸質原料を主原料と
して用い、水熱反応によってケイ酸カルシウム水和物ス
ラリーを製造する方法であって、塩化バリウム及び／又
は塩化アルミニウムを添加することを特徴とするケイ酸
カルシウム水和物スラリーの製造方法、当該方法により
製造されたケイ酸カルシウム水和物スラリー及び該ケイ
酸カルシウム水和物スラリーを原料に用いるケイ酸カル
シウム成形体。
【効果】 硫酸イオンが殆ど存在しない状態でケイ酸カ
ルシウム水和物スラリーを製造することができ、かさ密
度が低く、優れた軽量化効果を発揮するケイ酸カルシウ
ム水和物スラリーを安定して得ることができる。そし
て、該ケイ酸カルシウム水和物スラリーを用いることに
より、軽量で且つ施工性が良く、更に耐久性にも優れる
良質のケイ酸カルシウム成形体が効率良く得られる。A method for producing a calcium silicate hydrate slurry by a hydrothermal reaction using a calcareous raw material and a siliceous raw material as main raw materials, comprising barium chloride and / or aluminum chloride. A method for producing a calcium silicate hydrate slurry, a calcium silicate hydrate slurry produced by the method, and a calcium silicate molded article using the calcium silicate hydrate slurry as a raw material. [Effect] Calcium silicate hydrate slurry can be produced in a state where almost no sulfate ion is present, and a calcium silicate hydrate slurry having a low bulk density and an excellent lightening effect can be stably obtained. be able to. By using the calcium silicate hydrate slurry, a high-quality calcium silicate molded body that is lightweight, has good workability, and is excellent in durability can be obtained efficiently.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、かさ密度が低く、
優れた軽量化効果を発揮するケイ酸カルシウム水和物ス
ラリー及び該スラリーを原料に用いるケイ酸カルシウム
成形体に関する。TECHNICAL FIELD The present invention has a low bulk density,
The present invention relates to a calcium silicate hydrate slurry that exhibits an excellent effect of reducing weight, and a calcium silicate compact using the slurry as a raw material.
【０００２】[0002]
【従来の技術】ケイ酸カルシウム水和物は製品の軽量
化、強度向上及び寸法安定性をもたらすことから、これ
を配合したケイ酸カルシウム成形体は、建材、断熱材、
耐火被覆板等として広く使用されている。ケイ酸カルシ
ウム水和物は、石灰質原料、ケイ酸質原料及び必要に応
じて無機質充填材や補強繊維を添加し、水と混合するこ
とより得られた原料スラリーを高温高圧にて反応させる
ことにより、ケイ酸カルシウム水和物スラリーとして得
ることができる。ケイ酸カルシウム水和物を配合したケ
イ酸カルシウム成形体の製造方法としては、以下の２種
類に大別される。
（１）ケイ酸カルシウム水和物スラリー、石灰質原料及
びケイ酸質原料に必要に応じて無機質充填材や補強繊維
等を添加し、湿式混合した後、脱水成形を行い、高温高
圧することにより、ケイ酸カルシウム材を得る方法。
（２）ケイ酸カルシウム水和物スラリーに必要に応じて
無機質充填材や補強繊維等を添加し、湿式混合した後、
脱水成形を行い、乾燥することによって、ケイ酸カルシ
ウム材を得る方法。そして、ケイ酸カルシウム材の脱水
成形方法としては、通常加圧脱水法や抄造法等が使用さ
れている。（特公昭４５−２５７７１号公報、特開昭５
２−４５２８号公報、特開昭５２−１３５３３０号公報
等）。2. Description of the Related Art Calcium silicate hydrate brings about weight reduction, strength improvement and dimensional stability of products, and therefore calcium silicate compacts containing this compound are used as building materials, heat insulating materials,
Widely used as a fireproof coated plate. Calcium silicate hydrate is obtained by adding a calcareous raw material, a siliceous raw material and, if necessary, an inorganic filler or reinforcing fiber, and reacting the raw material slurry obtained by mixing with water at high temperature and high pressure. , A calcium silicate hydrate slurry can be obtained. The method for producing a calcium silicate compact containing a calcium silicate hydrate is roughly classified into the following two types. (1) Calcium silicate hydrate slurry, calcareous raw material and siliceous raw material are added with an inorganic filler, a reinforcing fiber or the like as needed, and after wet mixing, dehydration molding is performed, and high temperature and high pressure are applied. A method for obtaining a calcium silicate material. (2) If necessary, inorganic fillers, reinforcing fibers, etc. are added to the calcium silicate hydrate slurry, and after wet mixing,
A method for obtaining a calcium silicate material by performing dehydration molding and drying. As a dehydration molding method for the calcium silicate material, a pressure dehydration method, a papermaking method or the like is usually used. (Japanese Patent Publication No. 45-25771, Japanese Patent Laid-Open No. Sho 5)
2-4528, JP-A-52-135330, etc.).
【０００３】例えば、抄造法によるケイ酸カルシウム成
形体の製造は、石灰質原料、ケイ酸質原料、無機質充填
材、補強繊維及びケイ酸カルシウム水和物スラリーを水
に混合分散し、得られたスラリーを定量的にバット内に
供給し、丸網により薄いフィルム状に抄き上げて、フェ
ルトベルトに転写させた後、メーキングロールにて所定
の厚さまで巻き取り、積層後、取り外して板状のグリー
ンシートとし、これをオートクレーブにて養生硬化する
ことにより行われている。For example, in the production of a calcium silicate compact by a papermaking method, a calcareous raw material, a siliceous raw material, an inorganic filler, a reinforcing fiber and a calcium silicate hydrate slurry are mixed and dispersed in water to obtain a slurry. Is quantitatively fed into the vat, made into a thin film with a round net, transferred to a felt belt, wound up to a predetermined thickness with a making roll, laminated, and then removed to obtain a plate-shaped green. A sheet is used, and this is cured by curing in an autoclave.
【０００４】斯かるケイ酸カルシウム成形体は、軽量で
且つ施工性が良く、更に耐久性にも優れることが望まれ
るが、このような良質のケイ酸カルシウム成形体を得る
ためには、ケイ酸カルシウム水和物のかさ密度が低く且
つ軽量化効果に富むケイ酸カルシウム水和物スラリーを
用いることが必要である。It is desired that such a calcium silicate compact is lightweight, has good workability, and is excellent in durability. To obtain such a high-quality calcium silicate compact, silicic acid is required. It is necessary to use a calcium silicate hydrate slurry that has a low bulk density of calcium hydrate and is highly effective in weight reduction.
【０００５】しかしながら、これまでのケイ酸カルシウ
ム水和物スラリーの製造法では、水熱合成の反応にバラ
ツキが生じ、かさ密度が低く適正範囲の粒子径及び粒子
形状を有するケイ酸カルシウム水和物が安定して得られ
ず、その結果、充分に満足できる成形体を安定的に得る
ことはできなかった。However, in the conventional methods for producing calcium silicate hydrate slurries, there are variations in the reaction of hydrothermal synthesis, the bulk density is low, and the calcium silicate hydrate having a particle size and a particle shape within an appropriate range. Was not stably obtained, and as a result, a sufficiently satisfactory molded product could not be stably obtained.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、ケイ酸カル
シウム水和物のかさ密度が低く、優れた軽量化効果を発
揮するケイ酸カルシウム水和物スラリー及び該スラリー
を原料に用いるケイ酸カルシウム成形体を提供すること
を目的とする。DISCLOSURE OF THE INVENTION The present invention provides a calcium silicate hydrate slurry having a low bulk density of calcium silicate hydrate and exhibiting an excellent weight saving effect, and calcium silicate using the slurry as a raw material. The object is to provide a molded body.
【０００７】[0007]
【課題を解決するための手段】本発明者らは、斯かる実
情に鑑み鋭意検討したところ、ケイ酸カルシウム水和物
スラリーの製造過程で、一定量以上の硫酸イオンが存在
すると生成するケイ酸カルシウム水和物のかさ密度が増
大する傾向があり、またその硫酸イオン濃度が変動する
ことにより、ケイ酸カルシウム水和物のかさ密度も大き
く変動することを見出した。そして、更に検討した結
果、塩化バリウム及び／又は塩化アルミニウムの存在下
に、水、石灰質原料及びケイ酸質原料を混合し、水熱合
成することにより、反応の進度を上げることができ、ケ
イ酸カルシウム水和物のかさ密度が低く、優れた軽量化
効果を発揮できるケイ酸カルシウム水和物スラリーが得
られることを見出し、本発明を完成した。Means for Solving the Problems The inventors of the present invention have made diligent studies in view of such circumstances, and found that in the process of producing a calcium silicate hydrate slurry, silicic acid generated when a certain amount or more of sulfate ions are present. It has been found that the bulk density of calcium hydrate tends to increase, and that the bulk density of calcium silicate hydrate also greatly changes due to the change of the sulfate ion concentration. Then, as a result of further study, by mixing water, a calcareous raw material and a siliceous raw material in the presence of barium chloride and / or aluminum chloride, and performing hydrothermal synthesis, the progress of the reaction can be increased. The present invention has been completed by finding that a calcium hydrate hydrate slurry having a low bulk density of calcium hydrate and exhibiting an excellent weight-saving effect can be obtained.
【０００８】すなわち本発明は、石灰質原料及びケイ酸
質原料を主原料として用い、水熱反応によってケイ酸カ
ルシウム水和物スラリーを製造する方法であって、塩化
バリウム及び／又は塩化アルミニウムを添加することを
特徴とするケイ酸カルシウム水和物スラリーの製造方
法、当該方法により製造されたケイ酸カルシウム水和物
スラリー及び該ケイ酸カルシウム水和物スラリーを原料
に用いるケイ酸カルシウム成形体を提供するものであ
る。That is, the present invention is a method for producing a calcium silicate hydrate slurry by hydrothermal reaction using a calcareous raw material and a siliceous raw material as main raw materials, in which barium chloride and / or aluminum chloride is added. There is provided a method for producing a calcium silicate hydrate slurry characterized by the above, a calcium silicate hydrate slurry produced by the method, and a calcium silicate compact using the calcium silicate hydrate slurry as a raw material. It is a thing.
【０００９】[0009]
【発明の実施の形態】一般に、石灰質原料、ケイ酸質原
料及び水を混合して、水熱反応によってケイ酸カルシウ
ム水和物スラリーを製造する場合、斯かる水は工場生産
ライン内の水が用いられる。工場生産ライン内の水に
は、ケイ酸カルシウム成形体を製造する際に用いる石灰
質原料の一部にセメントからの石膏が含まれること、無
機質充填材として石膏を添加すること、また同じ工場内
にてセメント系、ケイ酸カルシウム系及び石膏系の製造
を併産している場合があることから、特に循環使用して
いる水には硫酸イオンが少なからず溶解していると考え
られる。そこで、この点について詳細に検討したとこ
ろ、反応系に存在する当該硫酸イオンが一定量以上にな
ると、生成するケイ酸カルシウム水和物のかさ密度が増
大する傾向があること、またその硫酸イオン濃度が大き
く変動する場合もあり（例えば、１００〜２００００pp
m）、この場合にはケイ酸カルシウム水和物のかさ密度
も大きく変動することが確認され、結果的に良質のケイ
酸カルシウム成形体の安定生産が困難になることを見出
した。そして、反応系に、塩化バリウム又は塩化アルミ
ニウムを添加して硫酸イオンが殆ど存在しない状態で水
熱反応せしめたことろ、反応進度が上がり、かさ密度が
低いスラリー組成物を得ることに成功した。BEST MODE FOR CARRYING OUT THE INVENTION Generally, when a calcareous raw material, a siliceous raw material and water are mixed to produce a calcium silicate hydrate slurry by hydrothermal reaction, such water is Used. Water in the factory production line contains gypsum from cement as part of the calcareous raw material used when manufacturing calcium silicate compacts, adding gypsum as an inorganic filler, and in the same factory In some cases, cement-based, calcium silicate-based, and gypsum-based products are co-produced, so it is considered that sulfate ions are not a little dissolved in the water that is being circulated. Therefore, when this point was examined in detail, when the sulfate ion present in the reaction system exceeds a certain amount, the bulk density of the calcium silicate hydrate formed tends to increase, and the sulfate ion concentration May vary greatly (for example, 100 to 20000pp
m), it was confirmed that in this case, the bulk density of calcium silicate hydrate also fluctuated greatly, and as a result, it was found that stable production of a high-quality calcium silicate compact is difficult. Then, barium chloride or aluminum chloride was added to the reaction system to cause a hydrothermal reaction in a state where sulfate ions were scarcely present, and the reaction progress was improved, and a slurry composition having a low bulk density was successfully obtained.
【００１０】本発明は、石灰質原料及びケイ酸質原料を
主原料として用い、水熱反応によってケイ酸カルシウム
水和物スラリーを製造する方法であって、塩化バリウム
及び／又は塩化アルミニウムを添加することを特徴とす
るものであり、塩化バリウム及び／又は塩化アルミニウ
ムを添加すること以外は、従来用いられている反応系、
すなわち石灰質原料、ケイ酸質原料及び水、更に必要に
応じてセルロースパルプ、ガラス繊維等の耐オートクレ
ーブ性を有する繊維類を加えて混合し、オートクレーブ
にて高温高圧で反応せしめてケイ酸カルシウムの水性ス
ラリーとする方法が適用される。The present invention is a method for producing a calcium silicate hydrate slurry by hydrothermal reaction using a calcareous raw material and a siliceous raw material as main raw materials, in which barium chloride and / or aluminum chloride is added. Characterized in that, except for adding barium chloride and / or aluminum chloride, the reaction system conventionally used,
That is, calcareous raw material, siliceous raw material and water, and if necessary, fibers having autoclave resistance such as cellulose pulp and glass fiber are added and mixed, and the mixture is reacted at high temperature and high pressure in an autoclave to obtain an aqueous solution of calcium silicate. The method of making a slurry is applied.
【００１１】従って、石灰質原料、ケイ酸質原料、繊維
類等の原料の種類は特に制限されるものではないが、好
適なものを示せば以下のとおりである。石灰質原料とし
ては、生石灰、消石灰等が挙げられ、ケイ酸質原料とし
ては、珪石、珪藻土、シリカフューム等が挙げられ、特
に珪石が好適である。Therefore, the types of raw materials such as calcareous raw materials, siliceous raw materials and fibers are not particularly limited, but the preferred ones are as follows. Examples of the calcareous raw material include quick lime and slaked lime, and examples of the siliceous raw material include silica stone, diatomaceous earth, silica fume, and the like, and silica stone is particularly preferable.
【００１２】また、石灰質原料とケイ酸質原料の配合比
（ＣａＯ／ＳｉＯ2のモル比）は、通常０．５〜１．５
であり、これらを質量比で５〜２０倍、好ましくは１０
〜１５倍の水に分散混合すればよい。また、必要に応じ
てスラリーの製造過程又は生成したスラリーに、セルロ
ースパルプ、ガラス繊維等の繊維類を添加してもよい。The compounding ratio of the calcareous raw material and the siliceous raw material (CaO / SiO 2 molar ratio) is usually 0.5 to 1.5.
And the mass ratio of these is 5 to 20 times, preferably 10
It suffices to disperse and mix in up to 15 times water. Further, fibers such as cellulose pulp and glass fibers may be added to the slurry manufacturing process or the generated slurry, if necessary.
【００１３】反応条件もまた、特に制限されるものでは
ないが、好ましくはスラリーを撹拌することのできるオ
ートクレーブにて、１５０℃〜２３０℃の範囲で温度設
定し、１〜２０時間実施すればよい。The reaction conditions are also not particularly limited, but preferably in an autoclave capable of stirring the slurry, the temperature is set in the range of 150 ° C to 230 ° C, and the reaction may be carried out for 1 to 20 hours. .
【００１４】塩化バリウム及び／又は塩化アルミニウム
の添加時期及び添加方法は、反応液中の硫酸イオンを効
率よく除去できるかぎり特に限定されるものでない。す
なわち予め原料である石灰質原料、ケイ酸質原料又は合
成用水に添加しておくことでもよく、或いは石灰質原
料、ケイ酸質原料及び水の反応混合物に添加してもよ
い。また、反応混合物に添加する場合には、水熱反応の
開始前、反応中の何れの段階において添加することも可
能である。このうち、硫酸イオンとより速やかに反応で
きる点から、予め合成用水に添加するのが好ましい。The addition timing and addition method of barium chloride and / or aluminum chloride are not particularly limited as long as the sulfate ions in the reaction solution can be removed efficiently. That is, it may be added in advance to the raw material, calcareous raw material, siliceous raw material or synthetic water, or may be added to the reaction mixture of the calcareous raw material, siliceous raw material and water. When it is added to the reaction mixture, it can be added at any stage before the start of the hydrothermal reaction and during the reaction. Of these, it is preferable to add it to the water for synthesis in advance because it can react with sulfate ions more quickly.
【００１５】塩化バリウム及び／又は塩化アルミニウム
の添加量は、例えば合成水中の硫酸イオン濃度が３００
ppm以下、特に２００ppm以下となるようにとなるように
添加するのが好ましく、全合成水に対し０．１質量％以
上添加するのが好ましいが、経済性を考慮すれば、０．
１〜５．０質量％の範囲で添加するのが好ましい。０．
１質量％未満であると、通常の合成水において十分に硫
酸イオン濃度を低下させることができず、水熱反応を助
成し、かさ密度を低くする効果が不十分となる。更に、
これに起因して製造するケイ酸カルシウム成形体の軽量
化効果が損なわれるばかりでなく、製造時、例えば丸網
式抄造法においてかさ密度の高いケイ酸カルシウム水和
物を原料として配合した場合、抄き上げられたフィルム
の保水量が減少し、積層時の層間密着力を著しく損ねて
しまい層間剥離不良が多発する。一方、塩化バリウム及
び／又は塩化アルミニウムを過剰に添加してもケイ酸カ
ルシウム水和物の性状には問題はないが、通常合成水に
おいて硫酸イオン濃度が、２００００ppm以上となるこ
とは殆どないこと及び製造コストを併せ考えると５．０
質量％以下とするのが好ましい。The addition amount of barium chloride and / or aluminum chloride is, for example, a sulfate ion concentration of 300 in synthetic water.
It is preferable to add it so as to be not more than ppm, especially not more than 200 ppm, preferably not less than 0.1% by mass with respect to the total synthetic water, but in consideration of economical efficiency, it is 0.
It is preferably added in the range of 1 to 5.0% by mass. 0.
If it is less than 1% by mass, the sulfate ion concentration cannot be sufficiently reduced in ordinary synthetic water, the effect of promoting the hydrothermal reaction and lowering the bulk density becomes insufficient. Furthermore,
Not only is the weight reduction effect of the calcium silicate molded product produced due to this impaired, but at the time of production, for example, when calcium silicate hydrate having a high bulk density in the reticulated papermaking method is blended as a raw material, The water retention amount of the film made up is reduced, the interlayer adhesion force during lamination is remarkably impaired, and delamination often occurs. On the other hand, even if barium chloride and / or aluminum chloride is added in excess, there is no problem in the properties of the calcium silicate hydrate, but the sulfate ion concentration in synthetic water is almost never 20000 ppm or more, and 5.0 considering the manufacturing cost
It is preferably not more than mass%.
【００１６】斯くして得られたケイ酸カルシウム水和物
スラリーは、後記試験例に示すように、ケイ酸カルシウ
ム水和物のかさ密度が低く、優れた軽量化効果を発揮し
得る新規なスラリー組成物である。ここでいうかさ密度
とは、ケイ酸カルシウム水和物スラリーをブフナーロー
ト等にて吸引脱水し、単位容積あたりの固形分の乾燥質
量を意味するものであり、ケイ酸カルシウム水和物スラ
リーの性状を評価する指標とされる。ケイ酸カルシウム
水和物の水熱反応が十分進行し、軽量化効果が期待でき
るケイ酸カルシウム水和物はかさ密度が低い。逆にかさ
密度の高いものは、ケイ酸カルシウム成形体に添加して
も目標とする軽量化効果が得られなくなるばかりでな
く、抄造法による製造のときにはフェルトベルト上に抄
き上げられたフィルムの保水量も目標を下回り、成形体
の層間密着性を悪化させる原因になる。以上の点から、
ケイ酸カルシウム水和物スラリー中のケイ酸カルシウム
水和物のかさ密度は、０．０５〜０．２g/cm3であるこ
とが好ましい。The calcium silicate hydrate slurry thus obtained is a novel slurry having a low bulk density of calcium silicate hydrate and capable of exhibiting an excellent weight saving effect, as shown in the test examples below. It is a composition. The bulk density here means the dry mass of the solid content per unit volume obtained by suction dehydration of a calcium silicate hydrate slurry with a Buchner funnel or the like, and the properties of the calcium silicate hydrate slurry. It is used as an index to evaluate. Calcium silicate hydrate has a low bulk density because the hydrothermal reaction of the hydrated calcium silicate progresses sufficiently and a weight saving effect can be expected. On the other hand, high bulk density not only makes it impossible to obtain the target weight-reducing effect even when added to the calcium silicate compact, but also when the film is produced by the paper-making method, The water retention amount is also below the target, which causes deterioration of interlayer adhesion of the molded product. From the above points,
The bulk density of the calcium silicate hydrate in the calcium silicate hydrate slurry is preferably 0.05 to 0.2 g / cm 3 .
【００１７】斯くして得られた本発明のケイ酸カルシウ
ム水和物スラリーをそのまま又は更に石灰質原料、ケイ
酸質原料、無機質充填材、補強繊維、樹脂等を加えて、
丸網式抄造法やフローオン方式、長フェルト方式、長網
方式等の抄造式製造法、或いは加圧脱水成形方式の製造
法や鋳型注入式の製造法等を用いることにより、軽量で
且つ施工性が良いケイ酸カルシウム成形体を製造するこ
とができる。具体的には、ケイ酸カルシウム水和物スラ
リー中の固形分のみによる成形体、ケイ酸カルシウム水
和物と樹脂及び／又は補強繊維との複合体、例えばケイ
酸カルシウム水和物を固形分換算で１〜５０質量％、セ
メントを０〜２０質量％、石灰質原料を５〜３０質量
％、ケイ酸質原料を１０〜５０質量％、無機質充填材を
０〜４０質量％及び補強繊維を１〜１０質量％の混合比
率にて含有する成形体等を製造することができる。The calcium silicate hydrate slurry of the present invention thus obtained is used as it is or after further addition of calcareous raw material, siliceous raw material, inorganic filler, reinforcing fiber, resin, etc.
Lightweight and construction is possible by using the roll-net paper making method, the flow-on method, the long felt method, the long wire method, etc., or the pressure dehydration molding method or the mold injection method. A calcium silicate compact having good properties can be manufactured. Specifically, a molded body based only on the solid content in the calcium silicate hydrate slurry, a composite of calcium silicate hydrate and a resin and / or reinforcing fibers, for example, calcium silicate hydrate is converted into solid content. 1 to 50% by mass, 0 to 20% by mass of cement, 5 to 30% by mass of calcareous raw material, 10 to 50% by mass of siliceous raw material, 0 to 40% by mass of inorganic filler and 1 to reinforcing fiber. It is possible to manufacture a molded product or the like containing a mixing ratio of 10% by mass.
【００１８】ここで、用いられる石灰質原料としては、
セメント、生石灰、消石灰等が挙げられ、製造性及びコ
スト等の点から生石灰及びセメントが好適である。ケイ
酸質原料としては、珪石、シリカフューム、珪藻土等が
挙げられ、特に珪石が好適である。無機質充填材として
は、炭酸カルシウム、マイカ、ウォラストナイト、二水
石膏、無水石膏等が挙げられる。補強繊維としては、木
質パルプ、各種麻類等の天然繊維、ガラス繊維、ロック
ウール、セラミックウール、炭素繊維等の無機繊維、人
造パルプ、ポリビニルアルコール、ポリプロピレン、ポ
リエチレン、ポリエステル、アクリル、レーヨン等の合
成繊維が挙げられ、強度及び耐衝撃性能を保持できるパ
ルプが好適である。Here, as the calcareous raw material used,
Examples thereof include cement, quick lime, and slaked lime, and quick lime and cement are preferable from the viewpoints of productivity and cost. Examples of the siliceous raw material include silica stone, silica fume, diatomaceous earth and the like, and silica stone is particularly preferable. Examples of the inorganic filler include calcium carbonate, mica, wollastonite, gypsum dihydrate, anhydrous gypsum and the like. As the reinforcing fibers, wood pulp, natural fibers such as various hemps, glass fibers, rock wool, ceramic wool, inorganic fibers such as carbon fibers, synthetic pulp, polyvinyl alcohol, polypropylene, polyethylene, polyester, acrylic, rayon, and other synthetic fibers. Examples of the fiber include pulp, and pulp that can maintain strength and impact resistance is preferable.
【００１９】[0019]
【実施例】以下、実施例により本発明を更に詳細に説明
する。
実施例１〜６、比較例１〜２
（１）ケイ酸カルシウム水和物スラリー及びそれを用い
た成形体の製造
塩化バリウム又は塩化アルミニウムのいずれか一方、あ
るいは両方を合成用水中に溶解させ、表１に示す濃度と
なるように当該合成用水を用い、生石灰３５質量％、珪
石６５質量％と１０倍の当該合成用水とを混合し、撹拌
機付オートクレーブにて２００℃、２時間の水熱合成を
し、所定の範囲のかさ密度を有する該ケイ酸カルシウム
水和物スラリーを製造した。得られたケイ酸カルシウム
水和物スラリーを用い、下記の配合によりケイ酸カルシ
ウム成形体を製造した。すなわち、普通ポルトランドセ
メントを１５質量％、生石灰を１５質量％、粉末珪石を
２５質量％、無機質充填材として炭酸カルシウムを２２
〜２６質量％、補強繊維として木質パルプを７質量％、
軽量化材としてケイ酸カルシウム水和物スラリーを該ス
ラリー中に含まれるケイ酸カルシウム水和物の乾燥質量
に換算して１２〜１６質量％を、全原料の９〜１４倍の
水と混合し、得られた原料スラリーを定量的にバット内
に供給し、丸網により薄いフィルム状に抄き上げて、フ
ェルトベルトに転写させた後、メーキングロールにて所
定の厚さまで巻き取り、積層後、取り外して板状のグリ
ーンシートとし、オートクレーブにて養生硬化せしめ、
目標とするケイ酸カルシウム成形体の製品を得た。EXAMPLES The present invention will be described in more detail below with reference to examples. Examples 1 to 6 and Comparative Examples 1 to 2 (1) Production of calcium silicate hydrate slurry and molded body using the same Either barium chloride or aluminum chloride, or both are dissolved in synthetic water, The synthetic water was used to obtain the concentrations shown in Table 1, 35% by mass of quick lime and 65% by mass of silica stone were mixed with 10 times of the synthetic water, and the mixture was heated at 200 ° C. for 2 hours in an autoclave with a stirrer. Synthesis was performed to produce the calcium silicate hydrate slurry having a bulk density within a predetermined range. Using the obtained calcium silicate hydrate slurry, a calcium silicate compact was manufactured with the following formulation. That is, 15% by mass of ordinary Portland cement, 15% by mass of quick lime, 25% by mass of powder silica, and 22% of calcium carbonate as an inorganic filler.
~ 26% by weight, 7% by weight of wood pulp as a reinforcing fiber,
As a weight-reducing material, calcium silicate hydrate slurry was converted into a dry mass of calcium silicate hydrate contained in the slurry, and 12 to 16% by mass was mixed with 9 to 14 times as much water as all raw materials. , Quantitatively supplying the obtained raw material slurry into the vat, and made into a thin film with a round net, after transferring to a felt belt, wound up to a predetermined thickness with a making roll, after lamination, Remove it to make a plate-shaped green sheet, and cure it in an autoclave,
A target product of the calcium silicate compact was obtained.
【００２０】得られたケイ酸カルシウム成形体につい
て、かさ密度、曲げ強度、抄造性、剥離不良の有無につ
いて評価した。結果を表１に併せて示す。尚、剥離不良
とは、オートクレーブ養生後または乾燥工程後に確認さ
れる層間のフクレ、剥がれを意味し、それが該ケイ酸カ
ルシウム成形体表面に一箇所から数箇所目視にて発生し
ているか否かを確認したものである。抄造性とは、抄造
法での製造時状況を４段階にて評価したものである。非
常に良好なものは◎、通常どおりでおおよそ問題のない
ものは○、グリーンシートのパサつき等に起因する密着
不良等があり、効率の低下が明確なものには×と評価し
た。The obtained calcium silicate compact was evaluated for bulk density, flexural strength, paper formability, and the presence or absence of peeling defects. The results are also shown in Table 1. In addition, peeling failure means blister between layers confirmed after autoclave curing or after the drying step, peeling, and whether or not it occurs visually from one place to several places on the surface of the calcium silicate compact. Is confirmed. The paper-making property is an evaluation of the situation at the time of production by the paper-making method in four stages. Very good ones were evaluated as ⊚, normal ones with no problems were evaluated as ◯, and adhesion was poor due to the dryness of the green sheet, etc., and when the decrease in efficiency was clear, it was evaluated as x.
【００２１】[0021]
【表１】 [Table 1]
【００２２】（２）評価結果
実施例１〜６では、本発明によるケイ酸カルシウム水和
物を使用することで、設定範囲のかさ密度、曲げ強度を
有し、抄造性に問題なく剥離不良のないケイ酸カルシウ
ム成形体が得られた。(2) Evaluation results In Examples 1 to 6, by using the calcium silicate hydrate according to the present invention, the bulk density and flexural strength in the set ranges were obtained, and the peelability was good without any problem in paper formability. A calcium silicate compact was obtained.
【００２３】比較例１は、塩化バリウムの添加量が過少
であり、かさ密度が所望の範囲に達せず、製品に対する
軽量化効果が不十分となり、目標のケイ酸カルシウム成
形体が得られなかったばかりでなく、製品の剥離不良が
多く確認された。In Comparative Example 1, the amount of barium chloride added was too small, the bulk density did not reach the desired range, the weight reduction effect on the product was insufficient, and the target calcium silicate compact could not be obtained. Moreover, many peeling defects of the product were confirmed.
【００２４】比較例２は、塩化バリウムを添加しておら
ず、比較例２と同様に目標の軽量化効果を得られず、剥
離不良も発生した。In Comparative Example 2, barium chloride was not added, the target weight reduction effect was not obtained as in Comparative Example 2, and peeling failure occurred.
【００２５】[0025]
【発明の効果】本発明によれば、工場における製造循環
水を用いた場合でも硫酸イオンが殆ど存在しない状態で
ケイ酸カルシウム水和物スラリーを製造することがで
き、かさ密度が低く、優れた軽量化効果を発揮するケイ
酸カルシウム水和物スラリーを安定して得ることができ
る。そして、該ケイ酸カルシウム水和物スラリーを用い
ることにより、軽量で且つ施工性が良く、更に耐久性に
も優れる良質のケイ酸カルシウム成形体が効率良く得ら
れる。EFFECTS OF THE INVENTION According to the present invention, a calcium silicate hydrate slurry can be produced in a state in which sulfate ions are almost absent even when production circulating water in a factory is used, and the bulk density is low and excellent. A calcium silicate hydrate slurry exhibiting a weight reduction effect can be stably obtained. By using the calcium silicate hydrate slurry, a high-quality calcium silicate compact that is lightweight, has good workability, and is excellent in durability can be efficiently obtained.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 太田 耕平 東京都港区芝大門２丁目12番10号 株式会 社エーアンドエーマテリアル内 (72)発明者 松井 晃介 東京都港区芝大門２丁目12番10号 株式会 社エーアンドエーマテリアル内 Ｆターム(参考） 4G012 PA10 PA22 PB09 PC01 PC04 PC11 PE08 4G019 DA02 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kohei Ota 2-12-10 Shiba Daimon, Minato-ku, Tokyo Stock market Company A & A Material (72) Inventor Kosuke Matsui 2-12-10 Shiba Daimon, Minato-ku, Tokyo Stock market Company A & A Material F-term (reference) 4G012 PA10 PA22 PB09 PC01 PC04 PC11 PE08 4G019 DA02
Claims (5)
して用い、水熱反応によってケイ酸カルシウム水和物ス
ラリーを製造する方法であって、塩化バリウム及び／又
は塩化アルミニウムを添加することを特徴とするケイ酸
カルシウム水和物スラリーの製造方法。1. A method for producing a calcium silicate hydrate slurry by hydrothermal reaction using a calcareous raw material and a siliceous raw material as main raw materials, wherein barium chloride and / or aluminum chloride is added. And a method for producing a calcium silicate hydrate slurry.
ムをケイ酸カルシウム水和物スラリーの全水量に対し
０．１〜５．０質量％添加するものである請求項１記載
の製造方法。2. The production method according to claim 1, wherein barium chloride and / or aluminum chloride is added in an amount of 0.1 to 5.0% by mass based on the total amount of water in the calcium silicate hydrate slurry.
れるケイ酸カルシウム水和物スラリー。3. A calcium silicate hydrate slurry produced by the method according to claim 1.
０．０５〜０．２g/cm 3である請求項３記載のケイ酸カ
ルシウム水和物スラリー。4. The bulk density of calcium silicate hydrate
0.05-0.2g / cm 3The silica gel according to claim 3, which is
Lucium hydrate slurry.
水和物スラリーを原料に用いるケイ酸カルシウム成形
体。5. A calcium silicate compact using the calcium silicate hydrate slurry according to claim 3 or 4 as a raw material.
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|---|---|---|---|
| JP2001269068A JP5162067B2 (en) | 2001-09-05 | 2001-09-05 | Calcium silicate hydrate slurry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001269068A JP5162067B2 (en) | 2001-09-05 | 2001-09-05 | Calcium silicate hydrate slurry |
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| JP5162067B2 JP5162067B2 (en) | 2013-03-13 |
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ID=19094948
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095727A (en) * | 2001-09-21 | 2003-04-03 | A & A Material Corp | Inorganic bearing material and method for producing the same |
| CN110041022A (en) * | 2019-04-02 | 2019-07-23 | 东南大学 | A kind of complex accelerator and ultra-light foamed cement for foamed cement |
| CN112250076A (en) * | 2020-11-09 | 2021-01-22 | 洛阳理工学院 | Preparation method of nano calcium silicate hydrate |
| CN112661164A (en) * | 2020-12-22 | 2021-04-16 | 东南大学 | Method for preparing calcium silicate hydrate by using waste liquid as raw material |
| CN113185171A (en) * | 2021-05-08 | 2021-07-30 | 中海石油(中国)有限公司湛江分公司 | Cement reinforcing agent suitable for deepwater low-temperature environment, preparation method thereof and cement paste system |
| CN116535187A (en) * | 2023-04-20 | 2023-08-04 | 东南大学 | Hydrated calcium silicate based composite heat-insulating material and preparation method thereof |
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| JP2001048630A (en) * | 1999-06-02 | 2001-02-20 | Asano Slate Co Ltd | Inorganic bearing face material and its production |
| JP2003095727A (en) * | 2001-09-21 | 2003-04-03 | A & A Material Corp | Inorganic bearing material and method for producing the same |
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| JPS63159242A (en) * | 1986-12-23 | 1988-07-02 | 松下電工株式会社 | Manufacture of fiber cement board |
| JP2000154050A (en) * | 1998-11-18 | 2000-06-06 | Asano Slate Co Ltd | Production of lightweight calcium silicate sheet |
| JP2000290054A (en) * | 1999-04-09 | 2000-10-17 | Tokuyama Corp | Hydraulic composition |
| JP2001048630A (en) * | 1999-06-02 | 2001-02-20 | Asano Slate Co Ltd | Inorganic bearing face material and its production |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003095727A (en) * | 2001-09-21 | 2003-04-03 | A & A Material Corp | Inorganic bearing material and method for producing the same |
| CN110041022A (en) * | 2019-04-02 | 2019-07-23 | 东南大学 | A kind of complex accelerator and ultra-light foamed cement for foamed cement |
| CN112250076A (en) * | 2020-11-09 | 2021-01-22 | 洛阳理工学院 | Preparation method of nano calcium silicate hydrate |
| CN112250076B (en) * | 2020-11-09 | 2023-04-07 | 洛阳理工学院 | Preparation method of nano calcium silicate hydrate |
| CN112661164A (en) * | 2020-12-22 | 2021-04-16 | 东南大学 | Method for preparing calcium silicate hydrate by using waste liquid as raw material |
| CN113185171A (en) * | 2021-05-08 | 2021-07-30 | 中海石油(中国)有限公司湛江分公司 | Cement reinforcing agent suitable for deepwater low-temperature environment, preparation method thereof and cement paste system |
| CN116535187A (en) * | 2023-04-20 | 2023-08-04 | 东南大学 | Hydrated calcium silicate based composite heat-insulating material and preparation method thereof |
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