JP2011213510A - Fiber-reinforced calcium silicate board - Google Patents
Fiber-reinforced calcium silicate board Download PDFInfo
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- JP2011213510A JP2011213510A JP2010081705A JP2010081705A JP2011213510A JP 2011213510 A JP2011213510 A JP 2011213510A JP 2010081705 A JP2010081705 A JP 2010081705A JP 2010081705 A JP2010081705 A JP 2010081705A JP 2011213510 A JP2011213510 A JP 2011213510A
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- 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
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
Description
本発明は、繊維強化ケイ酸カルシウム板を抄造により製造する際に、抄造に適する濾水性を得ることができる製造方法と、その繊維強化ケイ酸カルシウム板に関する。 TECHNICAL FIELD The present invention relates to a production method capable of obtaining drainage suitable for papermaking when a fiber-reinforced calcium silicate board is produced by papermaking, and the fiber-reinforced calcium silicate board.
ケイ酸カルシウム板はケイ酸カルシウムを主成分とした板状であり、補強繊維を含有した繊維強化ケイ酸カルシウム板が知られており、断熱性、耐熱性、加工性に優れており、保温材、耐火被覆材、建材などに広く用いられている。 Calcium silicate plate is a plate mainly composed of calcium silicate, fiber reinforced calcium silicate plate containing reinforcing fiber is known, and has excellent heat insulation, heat resistance and workability, and is a heat insulating material. Widely used in fireproof coating materials and building materials.
ケイ酸カルシウム板は抄造法（静態的反応法）や動態的反応法によって製造されている。抄造法は、ケイ酸質原料、石灰質原料、補強繊維を含む原料スラリーを抄造機によって板状に成形した後に、オートクレーブ中で水熱反応によってケイ酸カルシウムを生成させて硬化させる方法であり、ケイ酸カルシウムはトバモライト結晶またはトバモライト結晶に至らない低結晶性相によって形成されている。この抄造法によって製造されたケイ酸カルシウム板は主に一般建材として用いられている。一方、動態的反応法は原料スラリーを最初に水熱反応させて耐熱性に優れたゾノトライト結晶を生成させる方法であり、この方法で製造されたケイ酸カルシウム板は耐火被覆材などに用いられる。 Calcium silicate plates are manufactured by papermaking (static reaction method) or kinetic reaction method. The papermaking method is a method in which a raw material slurry containing a siliceous raw material, a calcareous raw material, and reinforcing fibers is formed into a plate shape by a papermaking machine, and then calcium silicate is generated and cured by a hydrothermal reaction in an autoclave. Calcium acid is formed by a low crystalline phase that does not lead to tobermorite crystals or tobermorite crystals. The calcium silicate board produced by this papermaking method is mainly used as a general building material. On the other hand, the kinetic reaction method is a method in which the raw slurry is first subjected to hydrothermal reaction to produce zonotlite crystals having excellent heat resistance, and the calcium silicate plate produced by this method is used as a fireproof coating material.
抄造装置としては、原料スラリーを円筒状の丸網で抄き上げた薄いボード状にし、これをメーキングドラムに巻き取って積層し、その後、平らに延ばして板状にプレスする丸網抄造法による装置や、原料スラリーを吸引脱水手段を備えたフェルトベルト上に層状に供給し、搬送中に脱水した後に裁断してボードにするフローオン成形法による装置が知られている。 As a paper making device, the raw slurry is made into a thin board made by making a cylindrical round net, wound around a making drum, stacked, and then flattened and pressed into a plate shape by a round net paper making method. An apparatus or an apparatus based on a flow-on molding method is known in which raw material slurry is supplied in layers on a felt belt provided with suction dehydrating means, dehydrated during conveyance, and then cut into a board.
何れの抄造法においても、抄造時には、固形分が過度に流出しないように適切な濾過速度を有することが必要であり、また、均一に抄造されるように適度な流動性が求められる。従来、補強繊維として石綿（アスベスト）を用いていたときには固形分の流出は少なかったが、安全のために石綿に代えてパルプを用いるようになると、消石灰などの原料微粒子が過度に流出せず、抄造に適する濾水性が得られるように、原料スラリーに濾過調整剤が添加されている。 In any papermaking method, at the time of papermaking, it is necessary to have an appropriate filtration rate so that the solid content does not flow out excessively, and appropriate fluidity is required so that papermaking is uniform. Conventionally, when asbestos (asbestos) was used as the reinforcing fiber, the outflow of solids was small, but when using pulp instead of asbestos for safety, raw material particles such as slaked lime do not flow out excessively, A filtration regulator is added to the raw slurry so as to obtain drainage suitable for papermaking.
濾過調整剤としてはベントナイト、アタパルジャイトなどの粘土鉱物が用いられている（特開平１０−１５６８１３号公報、特開平１１−７７６５０号公報）。また、原料スラリーにマイカなどを添加して抄造時に適度な含水率にすることが知られている（特開２００１−１５１５５３号公報）。さらに、セメント、シリカ、骨材、および補強繊維などを原料として抄造法によって形成されるセメント系板材について、原料スラリーにコロイダルシリカを添加して抄造時の抄き上げ効率を高める方法が知られている（特開２００２−２８９０５号公報） Clay minerals such as bentonite and attapulgite are used as filtration regulators (Japanese Patent Laid-Open Nos. 10-156913 and 11-77650). In addition, it is known that mica or the like is added to the raw slurry to obtain an appropriate water content during papermaking (Japanese Patent Application Laid-Open No. 2001-151553). In addition, for cement-based plates formed by papermaking using cement, silica, aggregates, and reinforcing fibers as raw materials, there is a known method for increasing the papermaking efficiency during papermaking by adding colloidal silica to the raw material slurry. (JP 2002-28905 A)
濾過調整剤としては粘土鉱物のベントナイトを用いると、吸水による長さ変化が大きくなる問題がある。また、コロイダルシリカを添加する方法では、コロイダルシリカは急速にゲル化するので、水を循環して抄造する実操業では原料スラリーの分散性が低下し、さらにコロイダルシリカのゲル化がスラリー中で部分的に進行するので、製品が不均一になると云う問題がある。 When bentonite of clay mineral is used as a filtration regulator, there is a problem that the length change due to water absorption becomes large. In addition, in the method in which colloidal silica is added, colloidal silica rapidly gels. Therefore, in the actual operation in which water is circulated to make paper, the dispersibility of the raw material slurry is reduced, and further, the gelation of colloidal silica is partially in the slurry. The problem is that the product becomes non-uniform.
本発明は、従来の製造方法における上記問題を解決したものであり、濾過調整剤としてフュームドシリカを用いることによって、抄造に適する濾水性と流動性を得ることができるようにし、均一な品質を有する繊維強化ケイ酸カルシウム板を製造することができる方法と、該方法によって製造した繊維強化ケイ酸カルシウム板を提供する。 The present invention solves the above-mentioned problems in the conventional production method, and by using fumed silica as a filtration regulator, it is possible to obtain drainage and fluidity suitable for papermaking, and to achieve uniform quality. There are provided a method capable of producing a fiber-reinforced calcium silicate plate having the fiber-reinforced calcium silicate plate produced by the method.
本発明は以下の繊維強化ケイ酸カルシウム板およびその製造方法に関する。
〔１〕ケイ酸カルシウムを主成分とし、補強繊維を含有し、フュームドシリカ（BET比表面積３０ｍ2/ｇ以上）を０.１５〜５.０質量％含有することを特徴とする繊維強化ケイ酸カルシウム板。
〔２〕ケイ酸質原料、石灰質原料、および補強繊維を含む原料スラリーを板状に抄造成形した後に、オートクレーブ中で水熱反応させて繊維強化ケイ酸カルシウム板を製造する方法において、ケイ酸質原料、石灰質原料、および補強繊維を含む原料にフュームドシリカを配合した原料スラリーを用いて抄造成形することを特徴とする製造方法。
〔３〕フュームドシリカのＢＥＴ比表面積が３０ｍ2/ｇ以上である上記[２]に記載する製造方法。
〔４〕フュームドシリカの配合量がケイ酸質原料、石灰質原料、および補強繊維を含む原料粉末の０.１５〜５.０質量％である上記[２]または上記[３]に記載する製造方法。
〔５〕原料がケイ酸質原料、石灰質原料、および補強繊維の他に、増量材、軽量物質、有機繊維、着色顔料の一種または二種以上を含有する上記[２]〜上記[４]の何れかに記載する製造方法。
The present invention relates to the following fiber-reinforced calcium silicate plate and a method for producing the same.
[1] A fiber-reinforced silica comprising calcium silicate as a main component, containing reinforcing fibers, and containing 0.15 to 5.0% by mass of fumed silica (BET specific surface area of 30 m 2 / g or more). Acid calcium plate.
[2] In a method for producing a fiber reinforced calcium silicate plate by forming a raw material slurry containing a siliceous raw material, a calcareous raw material, and reinforcing fibers into a plate shape and then hydrothermally reacting in a autoclave, A manufacturing method characterized by paper making using a raw material slurry in which fumed silica is blended with a raw material, a calcareous raw material, and a raw material containing reinforcing fibers.
[3] The production method according to [2], wherein the fumed silica has a BET specific surface area of 30 m 2 / g or more.
[4] The production according to [2] or [3] above, wherein the amount of fumed silica is 0.15 to 5.0% by mass of the raw material powder containing a siliceous raw material, a calcareous raw material, and reinforcing fibers Method.
[5] The above [2] to [4], wherein the raw material contains one or more of a filler, a lightweight substance, an organic fiber, and a color pigment in addition to the siliceous raw material, the calcareous raw material, and the reinforcing fiber. The manufacturing method described in any one.
本発明の製造方法によれば、粘土鉱物を用いずに、抄造に適する濾過性を有する原料スラリーにすることができ、長さ変化率の小さいケイ酸カルシウム板を抄造することができる。また、フュームドシリカは原料スラリー中でゲル化しないので、不均一な製品にならず、高品質の繊維強化ケイ酸カルシウム板を製造することができる。 According to the production method of the present invention, a raw material slurry having filterability suitable for papermaking can be obtained without using clay minerals, and a calcium silicate plate having a small length change rate can be made. Moreover, since fumed silica does not gel in the raw slurry, it does not become a non-uniform product, and a high-quality fiber-reinforced calcium silicate plate can be produced.
以下、本発明を実施形態に基づいて具体的に説明する。
本発明の製造方法は、ケイ酸質原料、石灰質原料、および補強繊維を含む原料スラリーを板状に抄造成形した後に、オートクレーブ中で水熱反応させて繊維強化ケイ酸カルシウム板を製造する方法において、ケイ酸質原料、石灰質原料、および補強繊維を含む原料にフュームドシリカを配合した原料スラリーを用いて抄造成形することを特徴とする製造方法である。
Hereinafter, the present invention will be specifically described based on embodiments.
The production method of the present invention is a method for producing a fiber-reinforced calcium silicate plate by forming a raw material slurry containing a siliceous raw material, a calcareous raw material, and a reinforcing fiber into a plate shape, followed by hydrothermal reaction in an autoclave. In addition, the present invention is a manufacturing method characterized in that a paper slurry is formed using a raw material slurry in which fumed silica is mixed with a raw material containing a siliceous raw material, a calcareous raw material, and a reinforcing fiber.
ケイ酸質原料としては、石英、非晶質のケイ酸、珪藻土などを用いることができる。石灰質原料としては、消石灰、生石灰、セメントなどを用いることができる。補強繊維としてはパルプが用いられる。パルプは針葉樹、広葉樹、木綿、麻、ケナフ、古紙などのパルプを使用することができる。 As the siliceous material, quartz, amorphous silicic acid, diatomaceous earth, or the like can be used. As the calcareous raw material, slaked lime, quick lime, cement and the like can be used. Pulp is used as the reinforcing fiber. Pulp can be used for pulp of conifers, hardwoods, cotton, hemp, kenaf, waste paper, and the like.
本発明の製造方法は上記原料にフュームドシリカを配合した原料スラリーを用いる。フュームドシリカは塩化珪素や有機珪素化合物などを気相中で加水分解や酸化分解することにより製造される。使用するフュームドシリカはＢＥＴ比表面積が３０ｍ2/ｇ以上のものが好ましい。少量で効果を上げるためには５０ｍ2/ｇ以上のフュームドシリカが効果的である。乾燥したフュームドシリカを使用すると特に分散性がよく、均一性に優れた製品を得ることができる。ＢＥＴ比表面積が３０ｍ2/ｇより小さいと濾過性を向上させる効果が十分ではない。 The production method of the present invention uses a raw material slurry in which fumed silica is blended with the above raw material. Fumed silica is produced by hydrolyzing or oxidatively decomposing silicon chloride or an organosilicon compound in the gas phase. The fumed silica used preferably has a BET specific surface area of 30 m 2 / g or more. In order to increase the effect in a small amount, fumed silica of 50 m 2 / g or more is effective. When dry fumed silica is used, a product having particularly good dispersibility and excellent uniformity can be obtained. If the BET specific surface area is smaller than 30 m 2 / g, the effect of improving the filterability is not sufficient.
フュームドシリカの配合量は、原料粉体に対して０.１５〜５.０質量％が適当であり、０.１５〜２.０質量％が好ましい。フュームドシリカの配合量が０.１５質量％より少ないと濾過性を向上させる効果が十分ではない。一方、この配合量が５.０質量％より多くなると吸水による長さ変化率が大きくなり、濾過時間が長くなる傾向がある。 The blending amount of fumed silica is suitably from 0.15 to 5.0% by weight, preferably from 0.15 to 2.0% by weight, based on the raw material powder. If the amount of fumed silica is less than 0.15% by mass, the effect of improving filterability is not sufficient. On the other hand, when the blending amount is more than 5.0% by mass, the rate of change in length due to water absorption increases, and the filtration time tends to be longer.
なお、フェロシリコンダストなどとして生成するシリカフュームは比表面積が比較的小さく、２０ｍ2/ｇ以下のものが多いので、濾過性を向上する効果が少ない。また、コロイダルシリカなどはスラリー中でゲル化し、製品が不均一になる問題がある。 Silica fume generated as ferrosilicon dust or the like has a relatively small specific surface area and is often 20 m 2 / g or less, and therefore has little effect of improving filterability. In addition, colloidal silica or the like gels in the slurry, causing a problem that the product becomes non-uniform.
原料スラリーにはケイ酸質原料、石灰質原料、および補強繊維の他に、増量材、軽量物質、有機繊維、着色顔料の一種または二種以上を配合してもよい。増量材は、必要な強度が確保される範囲で添加すればよく、ワラストナイト、マイカ、炭酸カルシウム、スラグやフライアッシュなどの廃棄物、石膏などを用いることができる。軽量物質は製品を軽量化する材料であり、ケイ酸カルシウム板の物性に影響を与えないものであればよく、パーライト、シラスバルーン、バーミキュライトなどを用いることができる。有機繊維はレーヨンなどの耐熱性のある繊維を使用することができる。 In addition to the siliceous raw material, the calcareous raw material, and the reinforcing fiber, the raw material slurry may contain one or more of fillers, lightweight substances, organic fibers, and color pigments. The extender may be added within a range where necessary strength is ensured, and wollastonite, mica, calcium carbonate, waste such as slag and fly ash, gypsum, and the like can be used. The lightweight substance is a material for reducing the weight of the product, and any material that does not affect the physical properties of the calcium silicate plate may be used, and perlite, shirasu balloon, vermiculite, and the like can be used. As the organic fiber, heat-resistant fiber such as rayon can be used.
原料スラリーの抄造方法は限定されない。丸網抄造法やフローオン抄造法などを利用することができる。例えば、上記原料スラリーを円筒状の丸網で薄いボードに抄き上げてメーキングドラムに巻き取って積層し、その後、平らに延ばして板状にプレスする。あるいは原料スラリーを吸引脱水手段を備えたフェルトベルト上に層状に供給し、搬送中に脱水した後に裁断してボードにする。抄造したボードをオートクレーブに入れ、水熱反応させてケイ酸カルシウムを生成させた後に、乾燥して製品にする。 The method for making the raw slurry is not limited. A round net paper making method, a flow-on paper making method, or the like can be used. For example, the raw material slurry is made into a thin board with a cylindrical round net, wound on a making drum and laminated, and then flattened and pressed into a plate shape. Alternatively, the raw material slurry is supplied in layers on a felt belt provided with suction dewatering means, dehydrated during transportation, and then cut into a board. The paper board is put in an autoclave and hydrothermally reacted to form calcium silicate, and then dried to obtain a product.
本発明の製造方法によれば、粘土鉱物を用いずに、フュームドシリカを用いることによって抄造に適する濾過性を有する原料スラリーにすることができる。また、フュームドシリカは原料スラリー中で分散性が良いので、不均一な製品にならず、高品質の繊維強化ケイ酸カルシウム板を製造することができる。 According to the production method of the present invention, it is possible to obtain a raw material slurry having filterability suitable for papermaking by using fumed silica without using a clay mineral. Moreover, since fumed silica has good dispersibility in the raw material slurry, it does not become a non-uniform product, and a high-quality fiber-reinforced calcium silicate plate can be produced.
本発明の繊維強化ケイ酸カルシウム板は、実施例１〜５に示すように、フュームドシリカを０.１５〜２.０質量％配合したものは、嵩比重０.９７〜０.９２であり、軽量である。また曲げ強度が１０N/mm2以上であって優れた強度を有し、さらに吸水による長さ変化率が０.１５％未満であり、形状安定性に優れている。 As shown in Examples 1 to 5, the fiber-reinforced calcium silicate plate of the present invention has a bulk specific gravity of 0.97 to 0.92 when 0.15 to 2.0% by mass of fumed silica is blended. Lightweight. In addition, the bending strength is 10 N / mm 2 or more, and the strength is excellent. Further, the length change rate due to water absorption is less than 0.15%, and the shape stability is excellent.
以下、本発明の実施例を比較例と共に示す。なお、嵩比重、曲げ強度、吸水による長さ変化率、濾過時間の測定方法は以下のとおりである。
〔嵩比重〕規格（JIS A 5430）に準拠して測定した。
〔曲げ強度〕規格（JIS A 1408）に準拠して測定した。
〔長さ変化率〕規格（JIS A 5430）に準拠して、吸水による長さ変化率を測定した。
〔濾過時間〕ブフナーロートにろ紙（JIS P 3801, 定性分析用1種）を敷き，固形分２０質量％のスラリーを５００ml入れて、アスピレーターで吸引濾過して表面の水が無くなるまでの時間を測定した。
Examples of the present invention are shown below together with comparative examples. In addition, the measuring methods of bulk specific gravity, bending strength, length change rate due to water absorption, and filtration time are as follows.
[Bulk specific gravity] Measured according to the standard (JIS A 5430).
[Bending strength] Measured according to the standard (JIS A 1408).
[Length change rate] The length change rate due to water absorption was measured in accordance with the standard (JIS A 5430).
[Filtration time] Place a filter paper (JIS P 3801, 1 type for qualitative analysis) on a Buchner funnel, put 500 ml of a slurry with a solid content of 20% by mass, and perform suction filtration with an aspirator to measure the time until the surface water disappears did.
〔実施例１〜６、比較例１〜４〕
表１示す配合で，工業用消石灰（CaO純度74％），シリカ粉末（SiO2純度96％，ブレーン７430cm2/ｇ）、乾燥したフュームドシリカ（BET比表面積90m2/ｇ）、叩解したパルプを水と混合した。混合したスラリーについて、濾水性試験を行った。濾水性能として濾過時間を測定した。また、プレス成形で作製した成形体を１８０℃で６時間のオートクレーブ養生を行い、製造したケイ酸カルシウム板について物性試験を行った。また、丸網式抄造装置によって成形し、抄造時の成形性を調べた。この結果を表２に示した。
[Examples 1-6, Comparative Examples 1-4]
Industrial slaked lime (CaO purity 74%), silica powder (SiO 2 purity 96%, Blaine 7430 cm 2 / g), dried fumed silica (BET specific surface area 90 m 2 / g), beaten pulp Was mixed with water. A drainage test was performed on the mixed slurry. Filtration time was measured as drainage performance. Moreover, the molded object produced by press molding was subjected to autoclave curing at 180 ° C. for 6 hours, and a physical property test was performed on the manufactured calcium silicate plate. Moreover, it shape | molded with the round net-type papermaking apparatus, and investigated the moldability at the time of papermaking. The results are shown in Table 2.
実施例１〜６は、何れもプレス成形によってボードを製造することができた。実施例３〜４は適度な濾過時間を有するので抄造に適し、成形性の良いボードを抄造することができる。また、フュームドシリカはスラリー中でよく分散するので均一な製品が得られた。 In each of Examples 1 to 6, a board could be manufactured by press molding. Examples 3 to 4 have an appropriate filtration time and are therefore suitable for papermaking, and can produce a board with good moldability. In addition, fumed silica was well dispersed in the slurry, and a uniform product was obtained.
一方、比較例1は濾過時間が短く、抄造には不適であった。また、比較例２は濾過時間が長く、３００秒以上であるため、抄造に適さず、長さ変化率も大きく、０.２％以上であった。ベントナイトを添加した比較例３は長さ変化率が大きく、０.２％に近い。 On the other hand, Comparative Example 1 had a short filtration time and was not suitable for papermaking. Further, in Comparative Example 2, since the filtration time was long and 300 seconds or longer, it was not suitable for papermaking, and the rate of change in length was large, being 0.2% or higher. Comparative Example 3 to which bentonite was added has a large rate of change in length, which is close to 0.2%.
比較例４はコロイダルシリカとして日産化学社のスノーテックス（固形分30質量％）を使用した。フュームドシリカを用いた場合と比較すると、濾過時間が９６秒の実施例３はフュームドシリカの添加量が０.５質量％で足りるが、比較例４では同程度の濾過時間にするにはコロイダルシリカの添加量は２.０質量％必要であり、多量の添加量が必要になる。また、抄造の実操業では、消石灰が溶解したアルカリ性の水を循環させて抄造しており、コロイダルシリカは急速にゲル化するので、循環水にコロイダルシリカを添加すると原料やコロイダルシリカの分散が不十分になり、またコロイダルシリカのゲル化がスラリー中で部分的に進むので、不均一な製品になる傾向が強い。 In Comparative Example 4, Snowtex (solid content: 30% by mass) manufactured by Nissan Chemical Co., Ltd. was used as colloidal silica. Compared to the case of using fumed silica, Example 3 with a filtration time of 96 seconds needs only 0.5% by mass of fumed silica. In Comparative Example 4, the same filtration time is required. The amount of colloidal silica added is 2.0% by mass, and a large amount is required. In the actual papermaking operation, alkaline water in which slaked lime is dissolved is circulated, and colloidal silica rapidly gels. Therefore, when colloidal silica is added to the circulating water, the dispersion of raw materials and colloidal silica is not required. It becomes sufficient, and the gelation of colloidal silica proceeds partially in the slurry, so it tends to be a non-uniform product.
Claims (5)
A fiber-reinforced calcium silicate plate comprising calcium silicate as a main component, containing reinforcing fibers, and containing 0.15 to 5.0% by mass of fumed silica (BET specific surface area of 30 m 2 / g or more). .
In a method for producing a fiber-reinforced calcium silicate plate by making a raw material slurry containing a siliceous raw material, a calcareous raw material, and a reinforcing fiber into a plate shape and then hydrothermally reacting in an autoclave, the siliceous raw material, calcareous A manufacturing method, wherein a raw material and a raw material slurry containing fumed silica mixed with a raw material containing reinforcing fibers are formed and formed.
The production method according to claim 2, wherein the BET specific surface area of the fumed silica is 30 m 2 / g or more.
The production method according to claim 2 or 3, wherein the amount of fumed silica is 0.15 to 5.0% by mass of the raw material powder containing a siliceous raw material, a calcareous raw material, and reinforcing fibers.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679188A (en) * | 2020-12-28 | 2021-04-20 | 广东雄塑环保板业有限公司 | Termite-resistant calcium silicate board and preparation process thereof |
| CN113896498A (en) * | 2021-10-29 | 2022-01-07 | 江苏德昶环保科技有限公司 | Preparation method of calcium silicate board |
| CN114133195A (en) * | 2021-11-25 | 2022-03-04 | 内蒙古中建亚太建材科技有限公司 | Preparation method of heat-insulating fireproof material |
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2010
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679188A (en) * | 2020-12-28 | 2021-04-20 | 广东雄塑环保板业有限公司 | Termite-resistant calcium silicate board and preparation process thereof |
| CN113896498A (en) * | 2021-10-29 | 2022-01-07 | 江苏德昶环保科技有限公司 | Preparation method of calcium silicate board |
| CN114133195A (en) * | 2021-11-25 | 2022-03-04 | 内蒙古中建亚太建材科技有限公司 | Preparation method of heat-insulating fireproof material |
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