JP3378610B2 - Manufacturing method of lightweight inorganic products - Google Patents
Manufacturing method of lightweight inorganic productsInfo
- Publication number
- JP3378610B2 JP3378610B2 JP13645493A JP13645493A JP3378610B2 JP 3378610 B2 JP3378610 B2 JP 3378610B2 JP 13645493 A JP13645493 A JP 13645493A JP 13645493 A JP13645493 A JP 13645493A JP 3378610 B2 JP3378610 B2 JP 3378610B2
- Authority
- JP
- Japan
- Prior art keywords
- diatomaceous earth
- pulp
- weight
- lightweight inorganic
- cement
- 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.)
- Expired - Fee Related
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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
- C04B2111/12—Absence of mineral fibres, e.g. asbestos
-
- 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
- C04B2111/30—Nailable or sawable materials
-
- 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)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、ノンアスベスト組成で
押出し成形による軽量無機質製品の製造方法の改良に関
するものである。
【０００２】
【従来の技術】従来より、セメントを原料とする無機質
製品を効率よく工業的に製造する方法として押出し成形
が広く用いられている。特に軽量な無機質製品を得るた
めには、一般的にパーライトやシラスバルーン等の軽量
骨材の添加が行われている。
【０００３】一方、近年、アスベストの有害性からノン
アスベスト組成への代替が必要条件となりつつあり、ガ
ラス繊維、パルプ、ポリプロピレンやビニロン等の合成
繊維が代替材料として使用されている。
【０００４】
【発明が解決しようとする課題】しかし、前者の軽量化
に関しては、これらの軽量骨材は脆く破壊されやすいの
で、押出し成形の工程中において破壊されるため十分な
軽量化を実現することができなかった。
【０００５】また、後者のノンアスベスト組成に関して
は、ようやく前述したような代替材料が見つかってきた
段階であり、実用上の使用強度、切断・切削等の加工性
や釘打ち性、押出し成形性、経済性等を総合的に考える
と、これらの代替材料を使いこなしていく製造方法の確
立においては、まだまだ不十分と言わざるを得ない。
【０００６】そこで本発明はこれらの問題点に鑑み、押
出し成形により製造される、軽量かつノンアスベスト組
成の軽量無機質製品の製造方法を提供することを目的と
するものである。
【０００７】
【課題を解決するための手段】前記目的を達成するため
に本発明の軽量無機質製品の製造方法について鋭意研究
を行った結果、セメント原料にけいそう土とパルプを添
加し、けいそう土の含有率及び、けいそう土とパルプの
添加比率を特定の範囲で選択し、オートクレーブで反応
させる方法を見出すに至った。
【０００８】すなわち、本発明にかかる軽量無機質製品
の製造方法は、セメントと、けいそう土と、パルプと、
水とを必須成分とした混合物において、含まれるＣａＯ
とＳｉＯ２のモル比を、ＣａＯ／ＳｉＯ２＝０．７〜
１．２とし、けいそう土の含有率を２５〜３５重量％と
し、けいそう土とパルプの重量比を、パルプ／けいそう
土＝０．２〜０．３とし、該混合物を押出し成形し、オ
ートクレーブ処理してカルシウムシリケート水和物を生
成させることを特徴としている。
【０００９】本発明に使用するセメントとは、ポルトラ
ンドセメント、アルミナセメント、高炉スラグセメン
ト、フライアッシュセメント等の、無機質製品に一般的
に使用されるものである。けいそう土は産地によって不
純物含有量が多少異なるが、特に限定するものではな
く、かさ比重も概ね０．１程度の軽量なものが一般的に
使用されているので、これを利用すれば良く限定はしな
い。セメントとけいそう土を、ＣａＯとＳｉＯ２のモル
比が、ＣａＯ／ＳｉＯ２＝０．７〜１．２となるように
調整することによって、後述するオートクレーブ処理に
よってケイカル反応がし易く、特に物性的に安定したト
バモライトに代表されるカルシウムシリケート水和物を
生成させることができる。
【００１０】また、けいそう土を多量に添加すると吸水
率が大きくなるため、従来は、けい石粉等を主体にして
不足のＳｉＯ２を補充していたが、本研究において、け
いそう土の添加量が３５重量％以下では、オートクレー
ブ処理を行い安定したカルシウムシリケート水和物を生
成することにより、飽和吸水率は大きくなるものの飽和
状態までの時間が長く初期吸水による体積変化が小さい
ため、凍結融解試験においてもクラック等の劣化は見ら
れず耐久性に関しては実用上問題ないことを見出だし
た。
【００１１】また、けいそう土は多孔質構造により、か
さ比重が軽くケイカル反応後も構造が保持されるため軽
量化に貢献すると共に、流動性に優れるため押出し成形
においても最適であるが、添加量が２５重量％を下まわ
ると、これらの効果も不十分である。但し、けいそう土
の添加量によってはＳｉＯ２が不足する場合もありけい
石粉等で補足することもあるが、できるだけ、けいそう
土のみで調整することが望ましい。
【００１２】パルプは、本発明で得られる軽量無機質製
品の強度を高めると共に切断・切削等の加工性や釘打ち
性を向上させ、さらに、保水性によって押出し成形性を
高める効果がある。種類として、針葉樹、広葉樹、故紙
等によって限定されるものではないが、本発明に使用さ
れる原料の混合性からみて繊維長は１ｍｍ以下であるこ
とが望ましい。パルプ自体は強固な結合力を持たないの
で多量に添加すると逆に製品強度が低下する。したがっ
て、けいそう土とパルプの重量比を、パルプ／けいそう
土＝０．２〜０．３の範囲とすることが好ましい。
【００１３】その他、適量の水と必要に応じてメチルセ
ルロース、カルボキシメチルセルロース等の増粘材が使
用される。また、本発明の主旨とは関係ない品質改善や
製造を円滑にするための補助剤の添加については特に限
定しない。
【００１４】従来より広く一般的に用いられている混合
機や押出し成形機を用いて、これらの原料を均一に混合
し押出し成形を行う。これらの操作条件は使用する装置
に応じて最適条件を設定すれば良い。オートクレーブ処
理条件に関しても、得られる軽量無機質製品の品質レベ
ルと処理コストからその都度選択されるべきものであっ
て、特に限定するものではない。
【００１５】
【実施例】以下、本発明の実施例及び比較例を用いてさ
らに詳細に説明する。
（実施例）本発明で使用した材料は以下の通りである。
市販の普通ポルトランドセメント、秋田産の粒度１５０
メッシュ以下で水分１５％以下のけいそう土、繊維長１
ｍｍ以下で水分８％以下の広葉樹（ユーカリ）パルプ、
市販のメチルセルロース。
【００１６】セメント、けいそう土、メチルセルロース
をニーダーで約１分混練後、パルプを添加してさらに約
２分混練し、水を添加してさらに約３分混練した後、真
空押出し成形機で成形し板状成形体を得た。
【００１７】ついで、この成形体を室内で１日間放置し
て取扱いのできる強度に達した後、オートクレーブで１
８０℃−８時間反応させ、その後、乾燥機にて６０℃−
２日間さらに１００℃−数時間乾燥して所望の軽量無機
質製品を得た。
【００１８】配合については、けいそう土の含有率（乾
燥基体）及びけいそう土とパルプの重量比とに応じた配
合量を後述の表１から表４に示した。但し、各原料の配
合量は重量部で示した。
【００１９】けいそう土の含有率を２０重量％とした配
合について表１に示す。
【００２０】
【表１】
けいそう土の含有率を２５重量％とした配合について表
２に示す。
【００２１】
【表２】
けいそう土の含有率を３５重量％とした配合について表
３に示す。
【００２２】
【表３】
けいそう土の含有率を４０重量％とした配合について表
４に示す。
【００２３】
【表４】本発明の実施例で得られた軽量無機質製品の曲げ強度及
び釘打ち性と、けいそう土の含有率及びけいそう土とパ
ルプの重量比との関係について図１に示した。
【００２４】曲げ強度に関しては１００ｋｇ／ｃｍ２以
上あれば実用上も問題ないことが分かった。また、釘打
ち時にクラックが入ることもなく容易に釘打ちできたも
のはプロットを黒塗りした。以上より図１を詳細に検討
した結果を以下に示す。
【００２５】けいそう土の含有率が２０％及び４０％で
は、曲げ強度が１００ｋｇ／ｃｍ２以上のプロットが全
く無く全体的に低い値を示したが、これは、含まれるＣ
ａＯとＳｉＯ２のモル比が、ＣａＯ／ＳｉＯ２＝０．７
〜１．２の範囲外にあるため、トバモライトの生成が有
効に行われないことが一因と考えられる。また、けいそ
う土の含有率が２５％及び３５％では、全体的に曲げ強
度が高い値を示していたが、けいそう土とパルプの重量
比が、パルプ／けいそう土＝０．２未満では釘打ち性が
悪く、０．３を越えると曲げ強度が１００ｋｇ／ｃｍ２
以下に低下する。したがって、けいそう土の含有率が２
５％〜３５％でかつ、けいそう土とパルプの重量比が、
パルプ／けいそう土＝０．２〜０．３において曲げ強度
及び釘打ち性に優れた軽量無機質製品が得られ、これら
の比重を測定したところ１．０前後であり、押出し成形
性にも問題無かった。
【００２６】（比較例１）共通の使用材料は実施例と同
様とし、セメント１００重量部、けいそう土３０重量
部、メチルセルロース１重量部、アスベスト２５重量部
及び必要量の水を一連の実施例と同様の方法で混練し、
押出し成形後、養生しオートクレーブで反応させ乾燥
後、無機質製品を得た。得られた無機質製品は曲げ強度
が１０１ｋｇ／ｃｍ２で強度は十分であるが、比重１．
４で重く、ひじょうに硬いため釘打ちし難く無理に打つ
と割れが発生した。なお、押出し成形性には問題無かっ
た。
【００２７】（比較例２）共通の使用材料は実施例と同
様とし、セメント１００重量部、パーライト５０重量
部、メチルセルロース３重量部、ポリプロピレン繊維５
重量部及び必要量の水を一連の実施例と同様の方法でに
混練し、押出し成形後、養生しオートクレーブで反応さ
せ乾燥後、無機質製品を得た。得られた無機質製品は比
重１．３で軽量化が不十分でパーライト添加の効果がな
く、曲げ強度が８２ｋｇ／ｃｍ２で強度の低下が大きか
った。釘打ち性は比較例１に比較して若干良かった。な
お、押出し成形性には問題無かった。
【００２８】以上の結果より、本発明に基ずく実施例に
おいては比較例に対して、軽量でかつ曲げ強度及び釘打
ち性に優れた軽量無機質製品が得られた。
【００２９】
【発明の効果】以上の説明から明らかなように、本発明
にかかる軽量無機質製品の製造方法によれば、実用強度
を低下することなく比重を従来に比較して約３割減少す
ることができると共に、釘打ち性に優れた軽量無機質製
品を得ることができる。また、製造工程において、有害
なアスベストを使用することなく容易に押出し成形がで
きるという効果が得られる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for producing a lightweight inorganic product by extrusion molding with a non-asbestos composition. 2. Description of the Related Art Extrusion molding has been widely used as a method for efficiently and industrially producing inorganic products using cement as a raw material. Particularly, in order to obtain a lightweight inorganic product, a lightweight aggregate such as perlite or shirasu balloon is generally added. On the other hand, in recent years, replacement of non-asbestos composition due to the harmfulness of asbestos has become a necessary condition, and synthetic fibers such as glass fiber, pulp, polypropylene, and vinylon have been used as alternative materials. [0004] However, regarding the former weight reduction, since these lightweight aggregates are brittle and easily broken, they are broken during the extrusion molding process, so that a sufficient weight reduction is realized. I couldn't do that. With respect to the latter non-asbestos composition, it is only at the stage when the above-mentioned alternative materials have been found at last, and practical use strength, workability such as cutting and cutting, nailing properties, extrusion moldability, Considering the economical efficiency and the like, it cannot be said that it is still insufficient to establish a manufacturing method that makes good use of these alternative materials. [0006] In view of these problems, an object of the present invention is to provide a method for manufacturing a lightweight inorganic product having a non-asbestos composition, which is manufactured by extrusion molding. Means for Solving the Problems In order to achieve the above object, as a result of diligent research on the method for producing a lightweight inorganic product of the present invention, diatomaceous earth and pulp were added to a cement raw material, and The soil content and the ratio of the addition of diatomaceous earth to pulp were selected within a specific range, and a method of reacting in an autoclave was found. That is, the method for producing a lightweight inorganic product according to the present invention comprises the steps of: cement, diatomaceous earth, pulp,
CaO contained in a mixture containing water as an essential component
And the molar ratio of SiO 2 to CaO / SiO 2 = 0.7 to
1.2, the content of diatomaceous earth is 25 to 35% by weight, the weight ratio of diatomite to pulp is pulp / diatomite = 0.2 to 0.3, and the mixture is extruded. Calcium silicate hydrate is produced by autoclaving. The cement used in the present invention is generally used for inorganic products such as portland cement, alumina cement, blast furnace slag cement, fly ash cement and the like. Diatomaceous earth has a slightly different impurity content depending on the place of production, but it is not particularly limited, and a lightweight material having a bulk specific gravity of about 0.1 is generally used. Do not. By adjusting the cement and the diatomaceous earth so that the molar ratio of CaO and SiO 2 becomes CaO / SiO 2 = 0.7 to 1.2, the autoclave treatment described later facilitates a keikal reaction, and particularly physical properties. Calcium silicate hydrate typified by tobermorite, which is stable to water. Further, since the water absorption increases in a large amount addition of diatomaceous earth, which conventionally has been supplemented with SiO 2 lack in the mainly silicic stone powder, etc., in the present study, the addition of diatomaceous earth When the amount is 35% by weight or less, the autoclave treatment is performed to generate a stable calcium silicate hydrate, and the saturated water absorption is increased, but the time until the saturated state is long and the volume change due to the initial water absorption is small, so that the freeze-thawing is performed. No deterioration such as cracks was observed in the test, and it was found that there was no practical problem in durability. Also, diatomaceous earth has a low bulk specific gravity due to its porous structure and maintains its structure even after the caical reaction, thereby contributing to weight reduction. In addition, its excellent fluidity makes it ideal for extrusion molding. If the amount is less than 25% by weight, these effects are insufficient. However, depending on the amount of diatomaceous earth added, SiO 2 may be insufficient and may be supplemented with silica stone powder or the like. However, it is desirable to adjust the diatomaceous earth only as much as possible. Pulp has the effect of increasing the strength of the lightweight inorganic product obtained by the present invention, improving the workability such as cutting and cutting, and the nailing performance, and further enhancing the extrudability by water retention. The type is not limited by softwood, hardwood, waste paper, etc., but the fiber length is desirably 1 mm or less in view of the mixing properties of the raw materials used in the present invention. Since pulp itself does not have a strong binding force, the addition of a large amount thereof conversely lowers the product strength. Therefore, the weight ratio of diatomaceous earth to pulp is preferably in the range of pulp / diatomaceous earth = 0.2 to 0.3. In addition, an appropriate amount of water and, if necessary, a thickener such as methylcellulose and carboxymethylcellulose are used. Further, there is no particular limitation on the addition of an auxiliary agent for improving quality and facilitating production, which is not related to the gist of the present invention. These materials are uniformly mixed and extruded using a mixer or an extruder, which has been widely used in the past. These operating conditions may be set to optimal conditions according to the device used. The autoclave processing conditions are to be selected each time from the quality level and processing cost of the obtained lightweight inorganic product, and are not particularly limited. The present invention will be described in more detail with reference to the following Examples and Comparative Examples. (Examples) Materials used in the present invention are as follows.
Commercially available ordinary Portland cement, particle size 150 from Akita
Diatomaceous earth less than mesh and less than 15% moisture, fiber length 1
hardwood (eucalyptus) pulp with a moisture of 8% or less,
Commercially available methylcellulose. After kneading cement, diatomaceous earth and methylcellulose for about 1 minute in a kneader, adding pulp and kneading for about 2 minutes, adding water and kneading for about 3 minutes, and forming with a vacuum extruder. A plate-like molded body was obtained. Then, the molded body is left in a room for one day to reach a handling strength.
The reaction was carried out at 80 ° C for 8 hours, and then at 60 ° C in a dryer.
Drying was further performed at 100 ° C. for several hours for two days to obtain a desired lightweight inorganic product. With respect to the blending ratio, the blending amounts according to the diatomaceous earth content (dry substrate) and the weight ratio of the diatomaceous earth to the pulp are shown in Tables 1 to 4 below. However, the blending amounts of the respective raw materials are shown in parts by weight. Table 1 shows the composition in which the content of diatomaceous earth was 20% by weight. [Table 1] Table 2 shows the composition in which the content of diatomaceous earth was 25% by weight. [Table 2] Table 3 shows the composition in which the content of diatomaceous earth was 35% by weight. [Table 3] Table 4 shows the composition in which the content of diatomaceous earth was 40% by weight. [Table 4] FIG. 1 shows the relationship between the bending strength and nailing properties of the lightweight inorganic product obtained in the examples of the present invention, the content of diatomaceous earth, and the weight ratio of diatomaceous earth to pulp. It has been found that there is no practical problem if the bending strength is 100 kg / cm 2 or more. Those that could be easily nailed without cracking at the time of nailing were painted in black. From the above, the result of studying FIG. 1 in detail is shown below. When the content of diatomaceous earth was 20% and 40%, there was no plot of bending strength of 100 kg / cm 2 or more, and the value was low overall.
When the molar ratio between aO and SiO 2 is CaO / SiO 2 = 0.7
It is considered that one of the reasons is that the generation of tobermorite is not performed effectively because it is out of the range of ~ 1.2. When the content of diatomaceous earth was 25% or 35%, the bending strength was generally high, but the weight ratio of diatomite to pulp was less than 0.2 pulp / diatomaceous earth. Is poor in nailing properties, and if it exceeds 0.3, the bending strength is 100 kg / cm 2.
It falls below. Therefore, the content of diatomaceous earth is 2
5% to 35%, and the weight ratio of diatomaceous earth to pulp is
When pulp / diatomaceous earth = 0.2-0.3, a lightweight inorganic product excellent in bending strength and nailing property was obtained. When the specific gravity of these products was measured, it was about 1.0, and there was also a problem in extrusion moldability. There was no. (Comparative Example 1) A common material used was the same as in the examples, and 100 parts by weight of cement, 30 parts by weight of diatomaceous earth, 1 part by weight of methylcellulose, 25 parts by weight of asbestos and a necessary amount of water were used in a series of examples. Knead the same way as
After extrusion molding, curing, reaction in an autoclave and drying, an inorganic product was obtained. The obtained inorganic product has a sufficient bending strength of 101 kg / cm 2 , but a specific gravity of 1.
4 was heavy and very hard, so it was hard to nail and cracked when forcibly struck. There was no problem with the extrudability. (Comparative Example 2) Common materials used were the same as in the example, 100 parts by weight of cement, 50 parts by weight of pearlite, 3 parts by weight of methylcellulose, and 5 parts of polypropylene fiber.
A part by weight and a necessary amount of water were kneaded in the same manner as in a series of Examples, extruded, cured, reacted in an autoclave, and dried to obtain an inorganic product. The obtained inorganic product had a specific gravity of 1.3, was insufficient in weight reduction and had no effect of adding pearlite, and had a bending strength of 82 kg / cm 2 and a large decrease in strength. Nailability was slightly better than Comparative Example 1. There was no problem with the extrudability. From the above results, in the examples according to the present invention, there were obtained lightweight inorganic products excellent in bending strength and nailing property as compared with the comparative example. As is clear from the above description, according to the method for producing a lightweight inorganic product of the present invention, the specific gravity is reduced by about 30% as compared with the conventional one without reducing the practical strength. And a lightweight inorganic product having excellent nailing properties can be obtained. Further, in the manufacturing process, there is obtained an effect that extrusion molding can be easily performed without using harmful asbestos.
【図面の簡単な説明】
【図１】本発明の実施例で得られた軽量無機質製品の曲
げ強度と、けいそう土の含有率及びけいそう土とパルプ
の重量比との関係を表す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing the relationship between the bending strength of a lightweight inorganic product obtained in an example of the present invention, the content of diatomaceous earth, and the weight ratio of diatomite to pulp. is there.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ //(Ｃ０４Ｂ 28/18 Ｃ０４Ｂ 14:08 14:08 16:02 Ｚ 16:02 24:38 Ａ 24:38） (58)調査した分野(Int.Cl.7，ＤＢ名) C04B 38/00 - 38/10 ──────────────────────────────────────────────────続 き Continued on front page (51) Int.Cl. 7 Identification symbol FI // (C04B 28/18 C04B 14:08 14:08 16:02 Z 16:02 24:38 A 24:38) (58) Field surveyed (Int. Cl. 7 , DB name) C04B 38/00-38/10
Claims (1)
水とを必須成分とした混合物において、含まれるＣａＯ
とＳｉＯ２のモル比を、ＣａＯ／ＳｉＯ２＝０．７〜
１．２とし、けいそう土の含有率を２５〜３５重量％と
し、けいそう土とパルプの重量比を、パルプ／けいそう
土＝０．２〜０．３とし、該混合物を押出し成形した
後、オートクレーブ処理してカルシウムシリケート水和
物を生成させることを特徴とする軽量無機質製品の製造
方法。(57) [Claims] [Claim 1] Cement, diatomaceous earth, pulp,
CaO contained in a mixture containing water as an essential component
And the molar ratio of SiO 2 to CaO / SiO 2 = 0.7 to
1.2, the content of diatomaceous earth was 25 to 35% by weight, the weight ratio of diatomite to pulp was pulp / diatomite = 0.2 to 0.3, and the mixture was extruded. After that, a method for producing a lightweight inorganic product, wherein the calcium silicate hydrate is formed by autoclaving.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13645493A JP3378610B2 (en) | 1993-05-14 | 1993-05-14 | Manufacturing method of lightweight inorganic products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13645493A JP3378610B2 (en) | 1993-05-14 | 1993-05-14 | Manufacturing method of lightweight inorganic products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06321656A JPH06321656A (en) | 1994-11-22 |
| JP3378610B2 true JP3378610B2 (en) | 2003-02-17 |
Family
ID=15175496
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|---|---|---|---|
| JP13645493A Expired - Fee Related JP3378610B2 (en) | 1993-05-14 | 1993-05-14 | Manufacturing method of lightweight inorganic products |
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| JP (1) | JP3378610B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006044991A (en) * | 2004-08-04 | 2006-02-16 | Matsushita Electric Works Ltd | Method of manufacturing ceramic building material |
| JP4667998B2 (en) * | 2004-08-11 | 2011-04-13 | 株式会社クラレ | Non-asbestos hydraulic paperboard |
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1993
- 1993-05-14 JP JP13645493A patent/JP3378610B2/en not_active Expired - Fee Related
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|---|---|
| JPH06321656A (en) | 1994-11-22 |
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