JPH11180749A - Production of inorganic cement plate - Google Patents
Production of inorganic cement plateInfo
- Publication number
- JPH11180749A JPH11180749A JP35182397A JP35182397A JPH11180749A JP H11180749 A JPH11180749 A JP H11180749A JP 35182397 A JP35182397 A JP 35182397A JP 35182397 A JP35182397 A JP 35182397A JP H11180749 A JPH11180749 A JP H11180749A
- Authority
- JP
- Japan
- Prior art keywords
- inorganic cement
- cement board
- aqueous slurry
- solid content
- weight
- 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.)
- Pending
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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この出願の発明は、無機質セ
メント板の製造方法に関するものである。さらに詳しく
は、この発明は、大過剰量の水や増粘剤を使用すること
なく、分散性及び流動性に富んだ水性スラリーを得、組
成が均一で優れた諸性能を示す無機質セメント板を低コ
ストで製造することのできる無機質セメント板の製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an inorganic cement board. More specifically, the present invention provides an aqueous cement slurry having high dispersibility and fluidity without using a large excess amount of water or a thickener, and an inorganic cement board having a uniform composition and excellent performances. The present invention relates to a method for manufacturing an inorganic cement board that can be manufactured at low cost.
【０００２】[0002]
【従来の技術】従来より、窯業系の外装材、瓦材、外構
部材等の建築材に、セメント、骨材及びパルプを主成分
とする無機質セメント板が広く用いられている。この無
機質セメント板は、通常、セメント、骨材及びパルプを
適量配合し、水と混合して流動性のある水性スラリーと
した後に、抄造法やプレス脱水法、あるいは押出し成形
法などにより未硬化板に成形し、次いで蒸気養生やオー
トクレーブ養生などを行い、養生硬化して製造される。
セメントには普通ポルトランドセメントが、骨材には珪
石粉、珪砂等がオートクレーブ養生時のセメント−シリ
カ反応促進、補強効果、そして、コスト削減などの観点
から適量配合されている。2. Description of the Related Art In the past, inorganic cement boards mainly composed of cement, aggregate and pulp have been widely used for building materials such as ceramic exterior materials, tile materials, and exterior members. This inorganic cement board is usually prepared by mixing an appropriate amount of cement, aggregate and pulp, mixing with water to form a flowable aqueous slurry, and then forming an uncured board by a papermaking method, a press dewatering method, or an extrusion molding method. And then cured by steam curing or autoclave curing, and cured.
An ordinary amount of Portland cement is mixed in the cement, and an appropriate amount of silica powder, silica sand, etc. is mixed in the aggregate from the viewpoints of acceleration of the cement-silica reaction during autoclave curing, reinforcing effect, and cost reduction.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記し
た従来法では、均一で流動性に富んだ水性スラリーを作
製するために、大過剰量の水又は増粘剤を必要としてお
り、これら大過剰量の水又は増粘剤の使用はコストに反
映していた。また、大過剰量の水を用いて水性スラリー
を作製した場合には、固形分であるセメント、骨材及び
パルプの比重差に基づき、これら固形分がスラリー中で
分離・沈降することがあった。このような不均一な水性
スラリーから製造される無機質セメント板は、組成が特
に厚み方向に不均一に分布し、諸性能の低下を引き起こ
していた。However, in the above-mentioned conventional method, a large excess of water or a thickener is required in order to produce a uniform and highly fluid aqueous slurry. The use of water or thickeners reflected cost. In addition, when an aqueous slurry was prepared using a large excess amount of water, these solids were sometimes separated and settled in the slurry based on a difference in specific gravity of cement, aggregate, and pulp as solids. . In the inorganic cement board manufactured from such a non-uniform aqueous slurry, the composition is non-uniformly distributed particularly in the thickness direction, causing deterioration in various performances.
【０００４】この出願の発明は、以上の通りの事情に鑑
みてなされたものであり、従来の無機質板の製造方法の
欠点を解消し、大過剰量の水や増粘剤を使用することな
く、分散性及び流動性に富んだ水性スラリーを得、組成
が均一で優れた諸性能を示す無機質セメント板を低コス
トで製造することのできる、新しい無機質セメント板の
製造方法を提供することを目的としている。[0004] The invention of this application has been made in view of the circumstances described above, and solves the drawbacks of the conventional method for producing an inorganic plate, without using a large excess amount of water or a thickener. The object of the present invention is to provide a new method for producing an inorganic cement board, which can produce an aqueous cement rich in dispersibility and fluidity and can produce an inorganic cement board having a uniform composition and excellent performance at low cost. And
【０００５】[0005]
【課題を解決するための手段】この出願の発明は、上記
の課題を解決するものとして、セメント、骨材及びパル
プを主成分とする水性スラリーから未硬化板を作製し、
これをオートクレーブ養生により養生硬化させて無機質
セメント板を製造する際に、主成分原料にフライアッシ
ュを全固形分に対して５〜３０重量％添加し、水性スラ
リーの固形分濃度を３０〜５５重量％とすることを特徴
とする無機質セメント板の製造方法を提供する。According to the invention of this application, an uncured plate is produced from an aqueous slurry mainly composed of cement, aggregate and pulp.
When this is cured and cured by autoclaving to produce an inorganic cement board, fly ash is added to the main component material in an amount of 5 to 30% by weight based on the total solid content, and the solid content concentration of the aqueous slurry is 30 to 55% by weight. %, And a method for producing an inorganic cement board characterized by the following:
【０００６】[0006]
【発明の実施の形態】この発明の無機質板の製造方法で
は、上記の通りに、セメント、骨材及びパルプを主成分
とする水性スラリーから未硬化板を作製し、これをオー
トクレーブ養生により養生硬化させて無機質セメント板
を製造する際に、主成分原料にフライアッシュを全固形
分に対して５〜３０重量％添加し、水性スラリーの固形
分濃度を３０〜５５重量％とする。BEST MODE FOR CARRYING OUT THE INVENTION In the method for producing an inorganic plate according to the present invention, as described above, an uncured plate is prepared from an aqueous slurry mainly composed of cement, aggregate and pulp, which is cured by autoclaving. In producing the inorganic cement board, fly ash is added to the main component material in an amount of 5 to 30% by weight based on the total solid content, and the solid content concentration of the aqueous slurry is adjusted to 30 to 55% by weight.
【０００７】フライアッシュは、粒子が球形であり、充
填性が良好である。このフライアッシュを全固形分に対
して５〜３０重量％原料に添加することで、水性スラリ
ーとした際の固形分の分散性及び流動性が向上し、水性
スラリーの固形分濃度を、通常の抄造法やプレス脱水法
などが適用されるスラリーに比べて高濃度の３０〜５５
重量％とすることができる。[0007] Fly ash has spherical particles and good filling properties. By adding this fly ash to the raw material in an amount of 5 to 30% by weight with respect to the total solid content, the dispersibility and fluidity of the solid content in an aqueous slurry can be improved, and the solid content concentration of the aqueous slurry can be reduced to a normal value. A higher concentration of 30 to 55 compared to a slurry to which a papermaking method or a press dewatering method is applied.
% By weight.
【０００８】フライアッシュの添加量が５重量％未満で
あると、水性スラリーの分散性及び流動性を向上させる
のに十分でなく、３０重量％を超えると、得られる無機
質セメント板の比重が低下し、曲げ強度、耐凍害性等の
物性が低下する。フライアッシュの５〜３０重量％の添
加でも無機質セメント板の比重は若干低下し、曲げ強
度、耐凍害性等の物性が低下するが、オートクレーブ養
生することで曲げ強度、耐凍害性等の物性の低下を抑制
することができる。得られる無機質セメント板は、良好
な物性を示す。When the amount of fly ash is less than 5% by weight, it is not sufficient to improve the dispersibility and fluidity of the aqueous slurry, and when it exceeds 30% by weight, the specific gravity of the obtained inorganic cement plate decreases. In addition, physical properties such as bending strength and frost damage resistance are reduced. Even when 5 to 30% by weight of fly ash is added, the specific gravity of the inorganic cement board is slightly reduced, and the physical properties such as flexural strength and frost damage resistance are reduced, but the physical properties such as flexural strength and frost damage resistance are reduced by autoclaving. The decrease can be suppressed. The resulting inorganic cement board shows good physical properties.
【０００９】水性スラリーの固定分濃度は、上記の通り
の３０〜５５重量％である。３０重量％未満では大過剰
量の水が解消されない上、セメント、骨材及びパルプが
比重差に基づいて固形分がスラリー中で分離・沈降し、
得られる無機質セメント板の組成が特に厚み方向に不均
一に分布し、物性の低下を招く。５５重量％を超える
と、増粘剤などを使用しない限り、スラリーの分散性及
び流動性を改善することができず、得られる無機質セメ
ント板の諸性能が著しく低下する。また、いずれの場合
にも無機質セメント板のコストに反映する。The fixed concentration of the aqueous slurry is 30 to 55% by weight as described above. If it is less than 30% by weight, a large excess of water is not eliminated, and cement, aggregate and pulp separate and settle in the slurry based on the specific gravity difference,
The composition of the obtained inorganic cement board is unevenly distributed particularly in the thickness direction, which causes deterioration in physical properties. If the content exceeds 55% by weight, the dispersibility and fluidity of the slurry cannot be improved unless a thickener or the like is used, and various properties of the obtained inorganic cement board are significantly reduced. In each case, the cost of the inorganic cement board is reflected.
【００１０】固形分濃度３０〜５５重量％の水性スラリ
ーは、大過剰量の水や増粘剤の使用を解消し、無機質セ
メント板の低コスト化に寄与する。また、スラリー内部
での固形分の厚み方向への移動を制限することができ、
固形分各成分の比重差に基づく分離・沈降を抑制する。
無機質セメント板の組成が均一化され、安定した諸性能
が得られる。その上、成形時の脱水量が軽減されもす
る。The aqueous slurry having a solid content of 30 to 55% by weight eliminates the use of a large excess amount of water and a thickener, and contributes to the cost reduction of the inorganic cement board. In addition, it is possible to limit the movement of the solid content in the thickness direction inside the slurry,
Suppresses separation and sedimentation based on the difference in specific gravity of each solid component.
The composition of the inorganic cement board is made uniform and stable various performances are obtained. In addition, the amount of dehydration during molding can be reduced.
【００１１】この発明の無機質セメント板の製造方法で
は、セメントには、一般に用いられているポルトランド
セメント、高炉セメント等を採用することができる。骨
材には、無機質セメント板の用途に応じて適当なものを
適宜選択することができる。たとえば、一般によく用い
られている鉱物性骨材、無機系骨材並びに有機系骨材か
ら適宜選択することができる。具体的には、珪石粉、珪
砂、砂利、パーライト、バーミキュライト、ワラストナ
イト、ガラスバルーン等が例示される。これらのセメン
ト及び骨材、そしてパルプは、その配合量に特に制限は
ない。無機質セメント板の用途に応じて適宜決定するこ
とができる。In the method for producing an inorganic cement board according to the present invention, generally used portland cement, blast furnace cement and the like can be used as the cement. An appropriate aggregate can be appropriately selected depending on the use of the inorganic cement board. For example, it can be appropriately selected from mineral aggregates, inorganic aggregates, and organic aggregates that are commonly used. Specifically, silica powder, silica sand, gravel, perlite, vermiculite, wollastonite, glass balloon and the like are exemplified. These cements, aggregates, and pulp are not particularly limited in their amounts. It can be appropriately determined according to the use of the inorganic cement board.
【００１２】パルプとしては、繊維長 0.5〜 4.0mmの針
葉樹パルプと繊維長 0.2〜 1.0mmの広葉樹パルプを配合
比率３０〜７０：７０〜３０で配合することができる。
補強繊維であるパルプは、繊維長 0.5〜 4.0mmの長い針
葉樹パルプを使用すると補強効果が高くなるが、水性ス
ラリー中において濃度が高くなると、繊維の絡み合いに
よりファイバーボールを形成しやすく、スラリーの分散
性及び流動性が悪化し、また、得られる無機質セメント
板の表面地合を悪化させもする。この繊維長 0.5〜 4.0
mmの針葉樹パルプに繊維長 0.2〜 1.0mmの広葉樹パルプ
を混合すると、上記問題が軽減され、補強効果と水性ス
ラリーの分散性及び流動性、そして無機質セメント板の
表面地合が両立する。As the pulp, softwood pulp having a fiber length of 0.5 to 4.0 mm and hardwood pulp having a fiber length of 0.2 to 1.0 mm can be blended at a blending ratio of 30 to 70:70 to 30.
Pulp, which is a reinforcing fiber, has a high reinforcing effect when long softwood pulp with a fiber length of 0.5 to 4.0 mm is used.However, when the concentration is high in an aqueous slurry, fiber balls are easily entangled by fiber entanglement, and the slurry is dispersed. The properties and the fluidity are deteriorated, and the surface texture of the obtained inorganic cement board is also deteriorated. This fiber length 0.5 ~ 4.0
When hardwood pulp having a fiber length of 0.2 to 1.0 mm is mixed with mm softwood pulp, the above problem is reduced, and the reinforcing effect, the dispersibility and fluidity of the aqueous slurry, and the surface formation of the inorganic cement board are compatible.
【００１３】配合比率は、繊維長 0.5〜 4.0mmの針葉樹
パルプと繊維長 0.2〜 1.0mmの広葉樹パルプの比で３０
〜７０：７０〜３０とするのが好ましい。この範囲内で
は、補強効果と水性スラリーの分散性及び流動性、そし
て無機質セメント板の表面地合を高レベルで両立させる
ことができる。配合比率が３０：７０未満の場合には、
パルプによる補強効果が十分に発現せず、曲げ強度等の
物性が低下しやすい。一方、７０：３０を超えると、水
性スラリーの分散性及び流動性が悪化し、スラリー中で
ファイバーボールが発生しやすくなる。得られる無機質
セメント板の表面地合が低下し、耐凍害性等の物性が悪
化する。The compounding ratio is 30 in the ratio of softwood pulp having a fiber length of 0.5 to 4.0 mm to hardwood pulp having a fiber length of 0.2 to 1.0 mm.
~ 70: 70 ~ 30 is preferred. Within this range, the reinforcing effect, the dispersibility and fluidity of the aqueous slurry, and the surface texture of the inorganic cement board can be compatible at a high level. When the compounding ratio is less than 30:70,
The reinforcing effect of the pulp is not sufficiently exhibited, and physical properties such as bending strength are likely to be reduced. On the other hand, if it exceeds 70:30, the dispersibility and fluidity of the aqueous slurry deteriorate, and fiber balls are easily generated in the slurry. The surface texture of the obtained inorganic cement board is reduced, and physical properties such as frost damage resistance are deteriorated.
【００１４】また、この発明の無機質セメント板の製造
方法では、主成分原料にミクロシリカを全固形分に対し
て 0.5〜 5.0重量％添加することもできる。ミクロシリ
カは、水性スラリーの分散性及び流動性をより向上さ
せ、固形分濃度３０〜５５重量％の高濃度水性スラリー
を流動性に富んだものとすることができる。得られる無
機質セメント板の表面地合が良好となる。また、ミクロ
シリカは、セメントとのポゾラン反応性が高く、充填性
が良好でもあるため、得られる無機質セメント板が稠密
な構造となり、曲げ強度、耐凍害性等の物性が向上す
る。In the method for producing an inorganic cement board according to the present invention, micro silica can be added to the main component material in an amount of 0.5 to 5.0% by weight based on the total solid content. The microsilica can further improve the dispersibility and fluidity of the aqueous slurry, and can make the high-concentration aqueous slurry having a solid content of 30 to 55% by weight rich in fluidity. The surface texture of the obtained inorganic cement board becomes good. Further, since microsilica has a high pozzolanic reactivity with cement and a good filling property, the resulting inorganic cement plate has a dense structure, and physical properties such as flexural strength and frost damage resistance are improved.
【００１５】このミクロシリカの添加量は、上記の通り
の 0.5〜 5.0重量％が好ましい。 0.5重量％未満では、
水性スラリーの分散性及び流動性が十分でなく、得られ
る無機質セメント板の表面地合や曲げ強度、耐凍害性等
の物性の向上も乏しい。また、 5.0重量％を超えると、
水性スラリーの濾水性が悪化し、生産性などに悪影響を
及ぼすこととなる。The addition amount of the microsilica is preferably 0.5 to 5.0% by weight as described above. At less than 0.5% by weight,
The dispersibility and fluidity of the aqueous slurry are not sufficient, and the resulting inorganic cement board has poor improvement in physical properties such as surface formation, bending strength, and frost resistance. If it exceeds 5.0% by weight,
The drainage of the aqueous slurry deteriorates, which adversely affects productivity and the like.
【００１６】この発明の無機質セメント板の製造方法で
は、そのようにして調整された水性スラリーから未硬化
板を作製するが、その作製法には種々の方法を採用する
ことができる。たとえば、水性スラリーから抄造法等に
よりグリーンシートを形成し、これをプレス成形するこ
とにより所定厚みに調整するとともに、表面に模様付け
して未硬化賦形板を作製することができる。あるいは、
水性スラリーを直接プレス脱水・成形して所定厚みに調
整するとともに、表面に模様付けして未硬化賦形板を作
製することができる。In the method of manufacturing an inorganic cement board according to the present invention, an uncured board is manufactured from the aqueous slurry thus adjusted, and various methods can be adopted for the manufacturing method. For example, a green sheet is formed from an aqueous slurry by a papermaking method or the like, and the green sheet is formed into a predetermined thickness by press molding, and the surface is patterned to produce an uncured shaped plate. Or,
The aqueous slurry can be directly press-dewatered and molded to adjust the thickness to a predetermined value, and the surface can be patterned to produce an uncured shaped plate.
【００１７】そして、この発明の無機質セメント板の製
造方法では、水性スラリーから作製した未硬化板をオー
トクレーブ養生し、養生硬化させ、所定の諸性能を発現
させる。以下実施例を示す。In the method for producing an inorganic cement board according to the present invention, an uncured board made from an aqueous slurry is cured in an autoclave and cured to exhibit predetermined performances. Examples will be described below.
【００１８】[0018]
【実施例】（実施例１）普通ポルトランドセメント、フ
ライアッシュ、珪石粉、ミクロシリカ、繊維長0.5〜 4.
0mmの針葉樹パルプ（ＮＢＫＰ）、及び繊維長 0.2〜 1.
0mmの広葉樹パルプ（ＬＢＫＰ）を各々表１に示す割合
で配合し、混合分散して濃度４０重量％の水性スラリー
とした。このスラリーを手抄き抄造してグリーンシーと
した後に、圧力100kgf/cm2、保圧１０秒の条件でプレス
し、７mm厚の未硬化賦形板を作製した。次いで、未硬化
賦形板を６０℃−４８時間の条件で湿熱養生し、さら
に、170℃−８時間の条件でオートクレーブ養生して無
機質セメント板を製造した。EXAMPLES (Example 1) Ordinary Portland cement, fly ash, silica powder, microsilica, fiber length 0.5 to 4.
0 mm softwood pulp (NBKP), and fiber length 0.2-1.
0 mm hardwood pulp (LBKP) was blended in the proportions shown in Table 1 and mixed and dispersed to form an aqueous slurry having a concentration of 40% by weight. This slurry was hand-made to form a green sea, and then pressed under the conditions of a pressure of 100 kgf / cm 2 and a holding pressure of 10 seconds to produce an uncured shaped plate having a thickness of 7 mm. Next, the uncured shaped plate was subjected to wet heat curing at 60 ° C. for 48 hours, and further to autoclave curing at 170 ° C. for 8 hours to produce an inorganic cement plate.
【００１９】得られた無機質セメント板について、水性
スラリーの分散性及び流動性、機械強度、並びに耐凍害
性を評価した。水性スラリーの分散性は、手抄き抄造を
行った際に得られるグリーンシートの表面地合を目視で
観察し、官能評価した。流動性については、スランプ試
験（ＪＩＳ Ａ １１０１）を行い、スランプ値を測定
し、スランプ値が１８cm以上であれば十分であると評価
した。The resulting inorganic cement board was evaluated for dispersibility and fluidity of an aqueous slurry, mechanical strength, and frost damage resistance. The dispersibility of the aqueous slurry was evaluated by sensory evaluation by visually observing the surface texture of the green sheet obtained during hand-making. Regarding the fluidity, a slump test (JIS A 1101) was performed, and the slump value was measured. It was evaluated that the slump value of 18 cm or more was sufficient.
【００２０】機械強度については、テストピースの厚さ
７mm、幅及び長さがともに 150mm、曲げスパン 100mm、
ヘッドスピード２mm/minの３点曲げ試験で曲げ強度を測
定した。そして、耐凍害性は、ＡＳＴＭ−Ａ法に基づい
て 300サイクルの凍害試験を行い、クラックの有無の外
観評価で評価した。Regarding the mechanical strength, the thickness of the test piece was 7 mm, the width and the length were both 150 mm, the bending span was 100 mm,
The bending strength was measured by a three-point bending test at a head speed of 2 mm / min. The frost damage resistance was evaluated by a 300-cycle frost damage test based on the ASTM-A method, and the appearance was evaluated for the presence or absence of cracks.
【００２１】なお、参考として、厚み膨潤率も合わせて
測定した。以上の評価結果も表１に示した。水性スラリ
ーの分散性及び流動性はともに良好であり、無機質セメ
ント板の諸性能も良好であった。For reference, the thickness swelling ratio was also measured. The above evaluation results are also shown in Table 1. The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good.
【００２２】[0022]
【表１】 [Table 1]
【００２３】（実施例２）水性スラリーの固形分濃度を
３０重量％に変えた以外は、実施例１と同様にして無機
質セメント板を製造し、その性能を評価した。評価結果
は表１に示した通りである。この場合にも、水性スラリ
ーの分散性及び流動性はともに良好であり、無機質セメ
ント板の諸性能も良好であった。 （実施例３）水性スラリーの固形分濃度を５５重量％に
変えた以外は、実施例１と同様にして無機質セメント板
を製造し、その性能を評価した。評価結果は表１に示し
た通りである。Example 2 An inorganic cement board was produced in the same manner as in Example 1 except that the solid content of the aqueous slurry was changed to 30% by weight, and its performance was evaluated. The evaluation results are as shown in Table 1. In this case as well, the dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 3) An inorganic cement board was produced in the same manner as in Example 1 except that the solid content concentration of the aqueous slurry was changed to 55% by weight, and its performance was evaluated. The evaluation results are as shown in Table 1.
【００２４】水性スラリーの分散性及び流動性はともに
良好であり、無機質セメント板の諸性能も良好であっ
た。 （実施例４）フライアッシュの配合量を５重量％に変え
た以外は、実施例１と同様にして無機質セメント板を製
造し、その性能を評価した。評価結果は表１に示した通
りである。The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 4) An inorganic cement board was produced in the same manner as in Example 1 except that the amount of fly ash was changed to 5% by weight, and its performance was evaluated. The evaluation results are as shown in Table 1.
【００２５】水性スラリーの分散性及び流動性はともに
良好であり、無機質セメント板の諸性能も良好であっ
た。 （実施例５）フライアッシュの配合量を３０重量％に変
えた以外は、実施例１と同様にして無機質セメント板を
製造し、その性能を評価した。評価結果は表１に示した
通りである。The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 5) An inorganic cement board was produced in the same manner as in Example 1 except that the amount of fly ash was changed to 30% by weight, and its performance was evaluated. The evaluation results are as shown in Table 1.
【００２６】水性スラリーの分散性及び流動性はともに
良好であり、無機質セメント板の諸性能も良好であっ
た。 （実施例６）繊維長 0.5〜 4.0mmの針葉樹パルプ（ＮＢ
ＫＰ）と繊維長 0.2 1.0mmの広葉樹パルプ（ＬＢＫＰ）
の配合比率を３０：７０に変えた以外は、実施例１と同
様にして無機質セメント板を製造し、その性能を評価し
た。評価結果は表１に示した通りである。The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 6) Softwood pulp (NB having a fiber length of 0.5 to 4.0 mm)
KP) and hardwood pulp (LBKP) with a fiber length of 0.2 1.0 mm
Was changed to 30:70, and an inorganic cement board was produced in the same manner as in Example 1, and the performance was evaluated. The evaluation results are as shown in Table 1.
【００２７】水性スラリーの分散性及び流動性はともに
良好であり、無機質セメント板の諸性能も良好であっ
た。 （実施例７）繊維長 0.5〜 4.0mmの針葉樹パルプ（ＮＢ
ＫＰ）と繊維長 0.2 1.0mmの広葉樹パルプ（ＬＢＫＰ）
の配合比率を７０：３０に変えた以外は、実施例１と同
様にして無機質セメント板を製造し、その性能を評価し
た。評価結果は表１に示した通りである。The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 7) Softwood pulp (NB having a fiber length of 0.5 to 4.0 mm)
KP) and hardwood pulp (LBKP) with a fiber length of 0.2 1.0 mm
Was changed to 70:30, and an inorganic cement board was produced in the same manner as in Example 1, and the performance was evaluated. The evaluation results are as shown in Table 1.
【００２８】水性スラリーの分散性及び流動性はともに
良好であり、無機質セメント板の諸性能も良好であっ
た。 （実施例８）実施例１において、原料にミクロシリカを
３重量％配合して、同様の操作により無機質セメント板
を製造し、その性能を評価した。評価結果は表１に示し
た通りである。The dispersibility and fluidity of the aqueous slurry were both good, and the various properties of the inorganic cement board were also good. (Example 8) In Example 1, 3 wt% of microsilica was added to the raw material, and an inorganic cement board was produced by the same operation, and the performance was evaluated. The evaluation results are as shown in Table 1.
【００２９】水性スラリーの分散性及び流動性がより良
好となり、また、無機質セメント板の諸性能も向上し
た。 （実施例９）ミクロシリカの配合量を 0.5重量％に変え
た以外は、実施例８と同様にして無機質セメント板を製
造し、その性能を評価した。評価結果は表１に示した通
りである。The dispersibility and fluidity of the aqueous slurry became better, and various properties of the inorganic cement board were also improved. (Example 9) An inorganic cement board was manufactured in the same manner as in Example 8 except that the amount of the microsilica was changed to 0.5% by weight, and the performance was evaluated. The evaluation results are as shown in Table 1.
【００３０】実施例１〜７に比べ、水性スラリーの分散
性及び流動性がより良好となり、また、無機質セメント
板の諸性能も向上した。 （実施例１０）ミクロシリカの配合量を 5.0重量％に変
えた以外は、実施例８と同様にして無機質セメント板を
製造し、その性能を評価した。評価結果は表１に示した
通りである。Compared with Examples 1 to 7, the dispersibility and fluidity of the aqueous slurry became better, and the various properties of the inorganic cement board were also improved. (Example 10) An inorganic cement board was produced in the same manner as in Example 8, except that the amount of the microsilica was changed to 5.0% by weight, and the performance was evaluated. The evaluation results are as shown in Table 1.
【００３１】実施例１〜７に比べ、水性スラリーの分散
性及び流動性がより良好となり、また、無機質セメント
板の諸性能も向上した。 （比較例１）水性スラリーの固形分濃度を２５重量％に
変えた以外は、実施例１と同様にして無機質セメント板
を製造し、その性能を評価した。原料の配合及び評価結
果は表２に示した通りである。Compared with Examples 1 to 7, the dispersibility and fluidity of the aqueous slurry became better, and the various properties of the inorganic cement board were also improved. (Comparative Example 1) An inorganic cement board was manufactured in the same manner as in Example 1 except that the solid content concentration of the aqueous slurry was changed to 25% by weight, and its performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３２】この場合には、無機質セメント板の諸性能
が低下した。これは、水性スラリーの固形分濃度がやや
低くなったため、スラリー中で固形分が分離・沈降し、
得られた無機質セメント板の組成が厚み方向に特に不均
一な分布となったためと考えられる。In this case, various properties of the inorganic cement board were reduced. This is because the solid content concentration of the aqueous slurry became slightly lower, so the solid content separated and settled in the slurry,
It is considered that the composition of the obtained inorganic cement board was particularly unevenly distributed in the thickness direction.
【００３３】[0033]
【表２】 [Table 2]
【００３４】（比較例２）水性スラリーの固形分濃度を
６０重量％に変えた以外は、実施例１と同様にして無機
質セメント板を製造し、その性能を評価した。原料の配
合及び評価結果は表２に示した通りである。この場合に
は、水性スラリーの固形分濃度が高くなり過ぎ、分散性
及び流動性がともに著しく悪化した。無機質セメント板
の諸性能も低下した。 （比較例３）フライアッシュの配合量を２重量％に変え
た以外は、実施例１と同様にして無機質セメント板を製
造し、その性能を評価した。原料の配合及び評価結果は
表２に示した通りである。Comparative Example 2 An inorganic cement board was produced in the same manner as in Example 1 except that the solid content of the aqueous slurry was changed to 60% by weight, and its performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2. In this case, the solid content concentration of the aqueous slurry was too high, and both the dispersibility and the fluidity were significantly deteriorated. The performance of the mineral cement board also decreased. (Comparative Example 3) An inorganic cement board was manufactured in the same manner as in Example 1 except that the amount of fly ash was changed to 2% by weight, and its performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３５】水性スラリーの分散性及び流動性がともに
低下した。 （比較例４）フライアッシュの配合量を４０重量％に変
えた以外は、実施例１と同様にして無機質セメント板を
製造し、その性能を評価した。原料の配合及び評価結果
は表２に示した通りである。Both the dispersibility and the fluidity of the aqueous slurry decreased. (Comparative Example 4) An inorganic cement board was produced in the same manner as in Example 1 except that the amount of fly ash was changed to 40% by weight, and its performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３６】無機質セメント板の諸性能が低下した。 （比較例５）繊維長 0.5〜 4.0mmの針葉樹パルプ（ＮＢ
ＫＰ）と繊維長 0.2 1.0mmの広葉樹パルプ（ＬＢＫＰ）
の配合比率を０： 100に変えた以外は、実施例１と同様
にして無機質セメント板を製造し、その性能を評価し
た。原料の配合及び評価結果は表２に示した通りであ
る。The performances of the inorganic cement board decreased. (Comparative Example 5) Softwood pulp with fiber length of 0.5 to 4.0 mm (NB
KP) and hardwood pulp (LBKP) with a fiber length of 0.2 1.0 mm
Was prepared in the same manner as in Example 1 except that the mixing ratio of was changed to 0: 100, and the performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３７】曲げ強度が低下した。これは、針葉樹パル
プが配合されなかったために、補強効果が不十分となっ
たのが原因と考えられる。 （比較例６）繊維長 0.5〜 4.0mmの針葉樹パルプ（ＮＢ
ＫＰ）と繊維長 0.2 1.0mmの広葉樹パルプ（ＬＢＫＰ）
の配合比率を 100：０に変えた以外は、実施例１と同様
にして無機質セメント板を製造し、その性能を評価し
た。原料の配合及び評価結果は表２に示した通りであ
る。The bending strength decreased. This is considered to be due to the fact that the reinforcing effect was insufficient because softwood pulp was not blended. (Comparative Example 6) Softwood pulp (NB having a fiber length of 0.5 to 4.0 mm)
KP) and hardwood pulp (LBKP) with a fiber length of 0.2 1.0 mm
Was changed to 100: 0, and an inorganic cement board was manufactured in the same manner as in Example 1 to evaluate its performance. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３８】水性スラリーの分散性及び流動性が低下し
た。スラリー中で針葉樹パルプがファイバーボールを形
成したためと考えられる。また、耐凍害性が低下した。
これは、グリーンシートの表面地合が悪化したことに起
因してプレス圧縮が不十分となったためと考えられる。 （比較例７）実施例１において、原料にミクロシリカを
７重量％配合して、同様の操作により無機質セメント板
を製造し、その性能を評価した。原料の配合及び評価結
果は表２に示した通りである。The dispersibility and fluidity of the aqueous slurry were reduced. It is considered that softwood pulp formed fiber balls in the slurry. In addition, the frost damage resistance was reduced.
This is considered to be due to insufficient press compression due to deterioration of the surface texture of the green sheet. (Comparative Example 7) In Example 1, 7% by weight of microsilica was added to the raw material, and an inorganic cement board was produced by the same operation, and the performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００３９】この場合には、水性スラリーの分散性及び
流動性、そして、無機質セメント板の諸性能に大きな変
化は見られなかったが、水性スラリーの濾水性が悪化し
た。 （比較例８）実施例１において、湿熱養生の条件を６０
℃− 168時間とし、オートクレーブ養生を行わずに無機
質セメント板を製造し、その性能を評価した。原料の配
合及び評価結果は表２に示した通りである。In this case, no significant change was observed in the dispersibility and fluidity of the aqueous slurry and the various properties of the inorganic cement board, but the drainage of the aqueous slurry was deteriorated. (Comparative Example 8) In Example 1, the condition of the wet heat curing was changed to 60.
C. -168 hours, an inorganic cement plate was produced without performing autoclave curing, and its performance was evaluated. The composition of the raw materials and the evaluation results are as shown in Table 2.
【００４０】無機質セメント板の諸性能が著しく低下し
た。オートクレーブ養生の必要性が確認される。もちろ
んこの発明は、以上の実施例によって限定されるもので
はない。セメント、骨材及びパルプの種類及び配合量を
はじめ、成形法、オートクレーブ養生条件等の細部につ
いては様々な態様が可能であることは言うまでもない。Various properties of the inorganic cement board were significantly reduced. The necessity of autoclave curing is confirmed. Of course, the present invention is not limited by the above embodiments. It goes without saying that various aspects are possible for details such as the molding method and the autoclave curing conditions, including the types and amounts of cement, aggregate and pulp.
【００４１】[0041]
【発明の効果】以上詳しく説明した通り、この発明によ
って、大過剰量の水や増粘剤を使用することなく、分散
性及び流動性に富んだ水性スラリーを得、組成が均一で
優れた性能を示す無機質セメント板を低コストで製造す
ることができる。As described in detail above, according to the present invention, an aqueous slurry rich in dispersibility and fluidity can be obtained without using a large excess amount of water or a thickener, and a uniform composition and excellent performance can be obtained. Can be produced at low cost.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ０４Ｂ 103:30 111:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI C04B 103: 30 111: 00
Claims (3)
る水性スラリーから未硬化板を作製し、これをオートク
レーブ養生により養生硬化させて無機質セメント板を製
造する際に、主成分原料にフライアッシュを全固形分に
対して５〜３０重量％添加し、水性スラリーの固形分濃
度を３０〜５５重量％とすることを特徴とする無機質セ
メント板の製造方法。1. An uncured board is produced from an aqueous slurry mainly composed of cement, aggregate and pulp, and cured by autoclave curing to produce an inorganic cement board. Is added to the total solid content of 5 to 30% by weight, and the solid content concentration of the aqueous slurry is 30 to 55% by weight.
葉樹パルプと繊維長0.2〜 1.0mmの広葉樹パルプを配合
比率３０〜７０：７０〜３０で配合する請求項１記載の
無機質セメント板の製造方法。2. The inorganic cement board according to claim 1, wherein softwood pulp having a fiber length of 0.5 to 4.0 mm and hardwood pulp having a fiber length of 0.2 to 1.0 mm are blended in a blending ratio of 30 to 70:70 to 30. Method.
対して 0.5〜 5.0重量％添加する請求項１又は２記載の
無機質セメント板の製造方法。3. The method for producing an inorganic cement board according to claim 1, wherein micro silica is added to the main component material in an amount of 0.5 to 5.0% by weight based on the total solid content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35182397A JPH11180749A (en) | 1997-12-22 | 1997-12-22 | Production of inorganic cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35182397A JPH11180749A (en) | 1997-12-22 | 1997-12-22 | Production of inorganic cement plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11180749A true JPH11180749A (en) | 1999-07-06 |
Family
ID=18419860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35182397A Pending JPH11180749A (en) | 1997-12-22 | 1997-12-22 | Production of inorganic cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11180749A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556885A (en) * | 2015-02-10 | 2015-04-29 | 天津城建大学 | Pumpable coal mine goaf backfilling material |
| CN106284012A (en) * | 2016-07-25 | 2017-01-04 | 常熟市市政建设有限责任公司 | A kind of reduce the method for liquid cement, flyash backfill settling amount after platform |
-
1997
- 1997-12-22 JP JP35182397A patent/JPH11180749A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556885A (en) * | 2015-02-10 | 2015-04-29 | 天津城建大学 | Pumpable coal mine goaf backfilling material |
| CN104556885B (en) * | 2015-02-10 | 2016-08-17 | 天津城建大学 | A kind of pumpable coal mine gob backfill material and preparation method thereof |
| CN106284012A (en) * | 2016-07-25 | 2017-01-04 | 常熟市市政建设有限责任公司 | A kind of reduce the method for liquid cement, flyash backfill settling amount after platform |
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