JPH0631182B2 - Manufacturing method of lightweight inorganic extrusion products - Google Patents
Manufacturing method of lightweight inorganic extrusion productsInfo
- Publication number
- JPH0631182B2 JPH0631182B2 JP60180123A JP18012385A JPH0631182B2 JP H0631182 B2 JPH0631182 B2 JP H0631182B2 JP 60180123 A JP60180123 A JP 60180123A JP 18012385 A JP18012385 A JP 18012385A JP H0631182 B2 JPH0631182 B2 JP H0631182B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- amorphous silica
- extruded product
- lightweight inorganic
- product
- 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 - Lifetime
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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
Description
【発明の詳細な説明】 〔技術分野〕 本発明は、建材等として用いられる軽量無機押出製品の
製法に関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a lightweight inorganic extruded product used as a building material or the like.
従来、無機押出製品の軽量化をはかる目的で、中空孔を
設けることが行われていた。しかし、この方法では、製
品の保形上の点で弊害が生じるため、嵩密度を１．０ｇ
／cm3（見掛比重を１．０）前後にすることは困難であ
る。そこで、軽量体のパーライト、ケイ酸カルシウム、
あるいは、有機発泡粒子を原材料に添加することが考え
られている。しかし、パーライトでは、押出圧力により
圧壊されるものが多いので、それほど軽量化をはかるこ
とができない。また、ケイ酸カルシウムは、スラリとし
て添加するため、水分の分離という問題が生じる。さら
に、有機発泡粒子を用いると、押出成形直後に成形品が
スプリングバックして、保形性が悪くなったり、クラッ
クができたりするという問題が生じる。それに、無機粒
子の添加で得られる押出製品の表面に凹凸が生じて平滑
性が低下するようなことも実用面を考えると避けられな
ければならない。Conventionally, hollow holes have been provided for the purpose of reducing the weight of inorganic extruded products. However, this method causes a problem in the shape retention of the product, so that the bulk density is 1.0 g.
/ Cm 3 (apparent specific gravity is around 1.0) is difficult. Therefore, lightweight perlite, calcium silicate,
Alternatively, it has been considered to add organic foamed particles to the raw material. However, since most pearlite is crushed by the extrusion pressure, the weight cannot be reduced so much. Moreover, since calcium silicate is added as a slurry, a problem of water separation occurs. Further, when the organic foamed particles are used, the molded product springs back immediately after extrusion molding, which causes a problem that shape retention is deteriorated or cracks are generated. In addition, it should be avoided from the practical viewpoint that the surface of the extruded product obtained by adding the inorganic particles becomes uneven and the smoothness is lowered.
この発明は、このような事情に鑑みてなされたものであ
って、軽量で高強度かつ表面平滑なものを得ることので
きる軽量無機押出製品の製法を提供することを目的とす
る。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method for producing a lightweight inorganic extruded product capable of obtaining a lightweight, high strength and smooth surface.
前記のような目的を達成するため、この発明は、セメン
ト類および軽量化のための材料を含む水混練物を押出成
形したのち養生硬化して軽量無機押出製品を得るあた
り、軽量化材料として、ガラス生成時に副生する外観が
多孔質塊状の無定形シリカを混練物に含ませるようにす
る方法であって、前記無定形シリカが、嵩密度０．７ｇ
／cm3以上１．１ｇ／cm3以下であり、平均粒径が１０〜
２０μｍであって、原材全体の２５重量％以上６０重量
％以下の使用量で用いられていることを特徴とする軽量
無機押出製品の製法を要旨としている。In order to achieve the above-mentioned object, the present invention is, as a lightweight material, in extruding a water kneaded material containing cement and a material for weight saving and then curing and curing to obtain a lightweight inorganic extruded product, A method for incorporating amorphous silica having a porous lump-like appearance as a by-product during glass production into a kneaded product, wherein the amorphous silica has a bulk density of 0.7 g.
/ Cm 3 or more and 1.1 g / cm 3 or less, with an average particle size of 10
The gist is a method for producing a lightweight inorganic extruded product, which has a thickness of 20 μm and is used in an amount of 25% by weight or more and 60% by weight or less of the entire raw material.
以下に、この発明を詳しく説明する。The present invention will be described in detail below.
ここで、セメント類（水硬性物質を含む）としては、た
とえば、ポルトランドセメント等の水硬性セメント、Ｃ
ａＯ、Ｃａ（ＯＨ）２等のＣａＯ系成分含有物あるいは
ＣａＯ系成分単体が用いられる。これらにスラグ等が添
加されたものであってもよい。セメント類は、２種以上
が併用されるようであってもよい。この発明において、
軽量化のための材料であって、ＳｉＯ２成分として使用
するシリカは、ガラス生成時に副生する無定形シリカで
ある。この無定形シリカの特徴は、表面が多孔質になっ
ていて、塊状でテーブルサンゴのようになっていること
がある。この無定形シリカは、充填度が悪いので、比較
的微粒でありながら、軽量化をはかることができる。ま
た、この無定形シリカを用いれば、高強度化もはかるこ
ともできるのである。無定形シリカは、軽量化のための
材料としてのほか、ポゾラン反応におけるＳｉＯ２成分
として利用されるとともに、オートクレーブ養生等の養
生を行う時においては、硬化体としての強度発現等のた
めのＳｉＯ２成分としても利用される。Here, as cements (including hydraulic substances), for example, hydraulic cements such as Portland cement, C
A CaO-based component-containing material such as aO or Ca (OH) 2 or a CaO-based component alone is used. The slag or the like may be added to these. Two or more kinds of cements may be used in combination. In this invention,
The silica used as a SiO 2 component, which is a material for reducing the weight, is amorphous silica that is a by-product when glass is produced. The feature of this amorphous silica is that the surface is porous and it is lumpy and looks like table coral. Since this amorphous silica has a low degree of filling, it can be made lighter while having relatively fine particles. Further, if this amorphous silica is used, it is possible to enhance the strength. Amorphous silica, in addition to as a material for weight reduction, while being used as the SiO 2 component in the pozzolanic reaction, at the time of performing curing of the autoclave curing, etc., SiO 2, such as for strength development as a curing body Also used as an ingredient.
無定形シリカの嵩密度は、０．７ｇ／cm3以上１．１ｇ
／cm3以下である。嵩密度が０．７ｇ／cm3未満では、押
出成形時の押出圧力により、圧壊される恐れが多くなる
傾向にあり、１．１ｇ／cm3を越えると、軽量化の効果
が少なくなる傾向にあるからである。平均粒径は、１０
〜２０μｍであって、セメント類の粒径と同程度のもの
である。押出成形時に成形品の表面が平滑になるからで
ある。平均粒径が大きすぎると、成形品の表面の凹凸が
激しくなるとともに、得られる製品の強度も充分でなく
なる傾向にある。小さいと、セメント類の粒子間にはま
り込む確率が増えて、軽量化が困難になる傾向にある。
粒度分布もセメント類に近い方が好ましく、１００μｍ
アンダーが９５％以上、５０μｍアンダーが９０％以
上、３０μｍアンダーが５０％以上となっているのが好
ましい。大きな粒子があまり多くなると、製品の表面平
滑性が損なわれるとともに強度低下をまねく傾向にあ
り、微粒子が多すぎると軽量化の効果が少なくなる傾向
にあるからである。無定形シリカの使用割合は、ポルト
ランドセメントやＣａ（ＯＨ）２のセメント類および、
セメント類以外の充填材等の原材料の使用量によって多
少異なるが、原材料全体の２０重量％以上６０重量％以
下にする。２０重量％未満になると、軽量化および高強
度化の効果が少なくなる傾向にあり、６０重量％を越え
ると比強度が低くなる傾向にあるからである。ＣａＯ成
分およびＳｉＯ２成分の比ＣａＯ／ＳｉＯ２（モル比）
は０．８〜１．２となるようにするのがよい。Amorphous silica has a bulk density of 0.7 g / cm 3 or more and 1.1 g
/ Cm 3 or less. If the bulk density is less than 0.7 g / cm 3 , the extrusion pressure during extrusion tends to cause crushing, and if it exceeds 1.1 g / cm 3 , the weight reduction effect tends to decrease. Because there is. Average particle size is 10
˜20 μm, which is similar to the particle size of cements. This is because the surface of the molded product becomes smooth during extrusion molding. If the average particle size is too large, the irregularity of the surface of the molded product becomes severe and the strength of the obtained product tends to be insufficient. If it is small, the probability of getting stuck between the cement particles increases, and it tends to be difficult to reduce the weight.
The particle size distribution is preferably close to that of cement, 100 μm
It is preferable that the under is 95% or more, the 50 μm under is 90% or more, and the 30 μm under is 50% or more. This is because if the number of large particles is too large, the surface smoothness of the product is impaired and the strength tends to decrease, and if the amount of fine particles is too large, the effect of weight reduction tends to decrease. Amorphous silica is used in the following proportions: Portland cement and Ca (OH) 2 cement,
Depending on the amount of raw materials such as fillers other than cement used, it should be 20 to 60 wt% of the total raw materials. If it is less than 20% by weight, the effect of weight reduction and strength increase tends to be small, and if it exceeds 60% by weight, the specific strength tends to be low. Ratio of CaO component and SiO 2 component CaO / SiO 2 (molar ratio)
Is preferably 0.8 to 1.2.
前記のようなセメント類や無定形シリカのほか、製品の
性能を向上させるといった目的のため、硅砂、ウォラス
トナイト（ウォラステナイト），雲母等の充填材、石
綿、合成繊維等の繊維、その他が用いられるようであっ
てもよい。また、押出成形の助剤として、メチルセルロ
ース、ポリアクリルアミド等を、原材料の固形分に対し
１重量％（部）〜３重量％（部）添加するようにすると
よい。In addition to the cements and amorphous silica mentioned above, fillers such as silica sand, wollastonite (wollastenite), mica, etc., fibers such as asbestos, synthetic fibers, etc. in addition to the above-mentioned cements and amorphous silica, etc. It may be used. Moreover, it is advisable to add 1% by weight (parts) to 3% by weight (parts) of methyl cellulose, polyacrylamide or the like as an auxiliary agent for extrusion molding to the solid content of the raw material.
この発明にかかる製法は、前記のような原材料を用い、
たとえば、つぎのようにして実施する。まず、原材料に
水を加えて混練し、こののち、混練物を押出成形して成
形する。水は原材料の固形分に対し、０．２〜０．５重
量部添加するのが好ましい。このあと、成形体を養生硬
化して製品を得る。養生は、室温で２〜４時間の前置時
間をとったあと６０〜８０℃で湿熱養生するか、１２０
℃以上でオートクレーブ養生するようにするとよい。ま
たは、両養生法を併用するようにしてもよい。The manufacturing method according to the present invention uses the above raw materials,
For example, it implements as follows. First, water is added to the raw materials and kneaded, and then the kneaded material is extrusion-molded to be molded. Water is preferably added in an amount of 0.2 to 0.5 parts by weight based on the solid content of the raw materials. Then, the molded body is cured and cured to obtain a product. Curing may be carried out at room temperature for 2 to 4 hours, followed by moist heat curing at 60 to 80 ° C, or 120
It is recommended to cure the autoclave at ℃ or above. Alternatively, both regimens may be used in combination.
このようにして得られた軽量無機押出製品は、軽量で高
強度なものとなる。そのうえ、ケイ酸カルシウムや有機
発泡粒子を用いたときのような問題が生じない。The lightweight inorganic extruded product thus obtained is lightweight and has high strength. Moreover, there is no problem as in the case of using calcium silicate or organic expanded particles.
つぎに、実施例および比較例について説明する。実施例
１〜４、参考例および比較例では、第１表に示されてい
る割合で原材料を用いることとした。Next, examples and comparative examples will be described. In Examples 1 to 4, Reference Examples and Comparative Examples, the raw materials were used in the proportions shown in Table 1.
ただし、Ｃａ（ＯＨ）２は１級試薬、ポルトランドセメ
ントは日本セメント（株）製の普通ポルトランドセメン
ト、ウォラストナイトはインド産のもの、ポリプロピレ
ン繊維は大和紡績（株）製で１５ｄ×１０mmのもの、メ
チルセルロースは信越化学工業（株）製の９０ＳＨ−１
５０００をそれぞれ用いることとした。また、副生シリ
カは、セントラル硝子（株）製の副生シリカを粉砕，分
級して製造した。副生シリカは、平均粒径１５μｍ、最
大粒径１００μｍ以下であって、粒度分布が、１００μ
ｍアンダー９５％以上、５０μｍアンダー９０％以上、
３０μｍアンダー６０％以上である。However, Ca (OH) 2 is a first-class reagent, Portland cement is ordinary Portland cement manufactured by Nippon Cement Co., Wollastonite is manufactured in India, and polypropylene fiber is manufactured by Daiwa Spinning Co., Ltd. and is 15d x 10 mm. , Methyl cellulose is 90SH-1 manufactured by Shin-Etsu Chemical Co., Ltd.
It was decided to use 5000 each. The by-product silica was produced by crushing and classifying by-product silica manufactured by Central Glass Co., Ltd. The by-product silica has an average particle size of 15 μm and a maximum particle size of 100 μm or less, and has a particle size distribution of 100 μm.
m under 95% or more, 50 μm under 90% or more,
30 μm under 60% or more.
前記のような配合で原材料を混合たのち水を加えて混練
し、この混練物を押出成形機で成形した。混水比Ｗ／Ｓ
（Ｈ２Ｏ／固形分）は０．３〜０．５となるよう各配合
につきそれぞれ調整した。押出成形機は本田鉄工社製の
ものを用いた。成形体を第１表に示されている養生法で
養生硬化させて無機押出製品を得た。 After mixing the raw materials with the above-mentioned composition, water was added and kneaded, and this kneaded product was molded by an extruder. Water mixture ratio W / S
(H 2 O / solid content) was adjusted for each formulation so as to be 0.3 to 0.5. The extruder used was manufactured by Honda Iron Works. The molded body was cured by the curing method shown in Table 1 to obtain an inorganic extruded product.
前記のようにして得られた製品につき、６０℃で２４時
間乾燥させたのち、嵩密度および曲げ強度を測定した。
結果を第２表に示す。The product obtained as described above was dried at 60 ° C. for 24 hours, and then the bulk density and bending strength were measured.
The results are shown in Table 2.
第２表より、比較例で得られた無機押出製品は、強度は
大きいが、嵩密度が大きくて軽量でなかったのに対し、
実施例１〜４で得られたものは、軽量で、そのうえ、軽
量無機押出製品としては強度も高いことがわかる。な
お、参考例では、無定形シリカの嵩密度が高く軽量化効
果が低いのであるが参考までに示しておく。 From Table 2, it can be seen that the inorganic extruded products obtained in Comparative Examples have high strength but high bulk density and are not lightweight.
It can be seen that the products obtained in Examples 1 to 4 are lightweight and have high strength as a lightweight inorganic extruded product. In the reference example, the amorphous silica has a high bulk density and a low weight-reducing effect, but it is shown for reference.
この発明は、以上に述べたとおりの構成を有することに
より、下記の効果(1)〜(3)を奏することが出来るため、
有用性が顕著である。This invention, by having the configuration as described above, because it is possible to exhibit the following effects (1) ~ (3),
The utility is remarkable.
効果(1)無機押出製品の軽量化が確実に図れる。Effect (1) The weight of the inorganic extruded product can be surely reduced.
これは、ひとつは、原材料全体の２５重量％以上を軽い
無定形シリカが必ず占めることになるからであり、もう
ひとつは、無定形シリカが、自身の圧壊を伴わずに大き
な軽量化効果を発揮する０．７ｇ／cm3以上１．１ｇ／c
m3以下という適切な嵩密度範囲にある上、１０μｍ以上
という適切な平均粒径範囲にあるからである。This is because light amorphous silica occupies 25% by weight or more of the total raw material without fail, and secondly, amorphous silica exerts a great weight saving effect without crushing itself. 0.7g / cm 3 or more 1.1g / c
This is because it is in an appropriate bulk density range of m 3 or less and in an appropriate average particle size range of 10 μm or more.
効果(2)無機押出製品の高強度化が確実に図れる。Effect (2) The strength of the inorganic extruded product can be surely increased.
これは、ひとつは、無定形シリカが、原材料全体の２５
重量％以上６０重量％以下という押出製品の強度を高め
る上で適切な範囲を必ず占めるからであり、もうひとつ
は、無定形シリカが、２０μｍ以下と高強度化に適した
平均粒径であるからである。This is because one of the amorphous silica is 25
This is because it always occupies an appropriate range for increasing the strength of the extruded product of from 60% by weight to 60% by weight. Another reason is that the amorphous silica has an average particle size of 20 μm or less, which is suitable for high strength Is.
効果(3)得られる無機押出製品の表面が平滑である。Effect (3) The surface of the obtained inorganic extruded product is smooth.
これは、無定形シリカが、押出製品の表面の平凹凸が激
しくならない２０μｍ以下の適切な平均粒径範囲にある
からである。This is because the amorphous silica is in an appropriate average particle size range of 20 μm or less so that the flatness of the surface of the extruded product does not become severe.
Claims (3)
む水混練物を押出成形したのち養生硬化して軽量無機押
出製品を得るにあたり、軽量化材料として、ガラス生成
時に副生する外観が多孔質塊状の無定形シリカを混練物
に含ませるようにする方法であって、前記無定形シリカ
が、嵩密度０．７ｇ／cm3以上１．１ｇ／cm3以下であ
り、平均粒径が１０〜２０μｍであって、原材料全体の
２５重量％以上６０重量％以下の使用量で用いられてい
ることを特徴とする軽量無機押出製品の製法。1. A lightweight inorganic extruded product is obtained by extrusion-molding a water-kneaded product containing cements and a material for reducing the weight, and obtaining a lightweight inorganic extruded product. A method of incorporating lumpy amorphous silica into a kneaded product, wherein the amorphous silica has a bulk density of 0.7 g / cm 3 or more and 1.1 g / cm 3 or less and an average particle size of 10 A method for producing a lightweight inorganic extruded product, characterized in that it is used in an amount of ˜20 μm and is used in an amount of 25% by weight or more and 60% by weight or less of the entire raw material.
よびＣａ（ＯＨ）２からなる群の中から選ばれた少なく
とも１種である特許請求の範囲第１項記載の軽量無機押
出製品の製法。2. The method for producing a lightweight inorganic extruded product according to claim 1, wherein the cements are at least one selected from the group consisting of hydraulic cement, CaO and Ca (OH) 2 .
アンダー９５％以上、５０μｍアンダー９０％以上，３
０μｍアンダー５０％以上である特許請求の範囲第１項
または第２項記載の軽量無機押出製品の製法。3. Amorphous silica has a particle size distribution of 100 μm.
Under 95% or more, 50 μm Under 90% or more, 3
The method for producing a lightweight inorganic extruded product according to claim 1 or 2, wherein 0 μm under is 50% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60180123A JPH0631182B2 (en) | 1985-08-15 | 1985-08-15 | Manufacturing method of lightweight inorganic extrusion products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60180123A JPH0631182B2 (en) | 1985-08-15 | 1985-08-15 | Manufacturing method of lightweight inorganic extrusion products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6241785A JPS6241785A (en) | 1987-02-23 |
| JPH0631182B2 true JPH0631182B2 (en) | 1994-04-27 |
Family
ID=16077820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60180123A Expired - Lifetime JPH0631182B2 (en) | 1985-08-15 | 1985-08-15 | Manufacturing method of lightweight inorganic extrusion products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0631182B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725580B2 (en) * | 1989-07-14 | 1995-03-22 | 新日本製鐵株式会社 | Extruded asbestos-free cement board |
| JP2565612B2 (en) * | 1992-03-04 | 1996-12-18 | ニッテツアスク株式会社 | Asbestos-free cement composition for extrusion molding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266526A (en) * | 1975-11-29 | 1977-06-02 | Matsushita Electric Works Ltd | Method of manufacturing hardened * reinforced cement products |
-
1985
- 1985-08-15 JP JP60180123A patent/JPH0631182B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5266526A (en) * | 1975-11-29 | 1977-06-02 | Matsushita Electric Works Ltd | Method of manufacturing hardened * reinforced cement products |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6241785A (en) | 1987-02-23 |
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