JPS60239348A - Admixer for cement extrusion moldings - Google Patents
Admixer for cement extrusion moldingsInfo
- Publication number
- JPS60239348A JPS60239348A JP9455884A JP9455884A JPS60239348A JP S60239348 A JPS60239348 A JP S60239348A JP 9455884 A JP9455884 A JP 9455884A JP 9455884 A JP9455884 A JP 9455884A JP S60239348 A JPS60239348 A JP S60239348A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- extrusion
- molded products
- hydroxyethyl cellulose
- admixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims description 50
- 238000001125 extrusion Methods 0.000 title claims description 42
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 18
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 18
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 18
- 238000006467 substitution reaction Methods 0.000 claims description 10
- 235000012438 extruded product Nutrition 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 5
- 238000009778 extrusion testing Methods 0.000 description 5
- 239000002657 fibrous material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000010425 asbestos Substances 0.000 description 3
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229920001479 Hydroxyethyl methyl cellulose Polymers 0.000 description 2
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 2
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011396 hydraulic cement Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000007613 slurry method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
°産業上の利用分野
本発明は、セメントおよび無機質繊維状物質を原料とし
て押出成形法により製造されるセメント押出成形品に用
いられる混和剤に関するものである。さらに詳しくは、
モル置換度＆６〜１α０の高置換ヒドロキシエチルセル
ロースよりなるセメント押出成形品用混和剤に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field The present invention relates to an admixture for use in cement extrusion molded products manufactured by extrusion molding using cement and inorganic fibrous substances as raw materials. For more details,
This invention relates to an admixture for cement extrusion molded products made of highly substituted hydroxyethyl cellulose having a molar substitution degree of &6 to 1α0.
従来の技術
近年、セメントおよび無機！１！［繊維状物質を原料と
して押出成形によって製造されるセメント押出成形品は
、多様な形状および寸法の製品を一つのダイによって押
出機で連続的に製造できるので、従来の注型成形法にか
わって。Conventional technology In recent years, cement and inorganic! 1! [Cement extrusion molded products manufactured by extrusion molding using fibrous materials as raw materials can be manufactured continuously using an extruder with a single die, so products of various shapes and sizes can be manufactured in place of the traditional cast molding method. .
住宅の外壁材および内壁材として各種の建築物に広く使
用されている。It is widely used in various buildings as an exterior and interior wall material for houses.
かかるセメント押出成形品の製造においては押出機の押
出圧力が高圧になるため、セメントおよび無機質繊維状
物質に水を加え、ニーダ−等により混合し、均一なセメ
ント混練品とし、次いで押出機により押出成形するにあ
たって脱水現象を起す。このためセメント押出成形品用
混和剤として脱水防止機能をもつメチルセルロース、メ
チルヒドロキシプロピルセルロース、メチルヒドロキシ
エチルセルロース、ヒドロキシエチルセルロース、ヒド
ロキシプロピルセルロースなどの水溶性セルロースエー
テルおよびエチレンオキサイド重合体、アクリルアミド
重合体、ポリビニルアルコールなどの水溶性高分子を使
用することが特公昭５３−８２３６８号公報などに記載
されているように良（知られている。In the production of such cement extrusion molded products, the extrusion pressure of the extruder is high, so water is added to the cement and inorganic fibrous material, mixed in a kneader etc. to make a uniform cement kneaded product, and then extruded using an extruder. Dehydration occurs during molding. For this reason, water-soluble cellulose ethers such as methylcellulose, methylhydroxypropylcellulose, methylhydroxyethylcellulose, hydroxyethylcellulose, and hydroxypropylcellulose, as well as ethylene oxide polymers, acrylamide polymers, and polyvinyl alcohol, have dehydration prevention functions as admixtures for cement extrusion products. It is well known to use water-soluble polymers such as, as described in Japanese Patent Publication No. 53-82368.
発明が解決しようとする問題点
しかしながら、セメント押出成形品においては、近年断
熱性、遮音性、耐火性、耐久性などの性能に対する要求
が向上し、複雑な形状の成形品が増加している。かかる
複雑な形状の押出成形品では押出成形時に非常に高い剪
断力が働き、このため摩擦熱によりセメント混練品の温
度が上昇し、夏季においては５０〜９０℃に到達する。Problems to be Solved by the Invention However, in recent years, demands for performance such as heat insulation, sound insulation, fire resistance, and durability have increased in cement extrusion molded products, and the number of molded products with complex shapes has increased. In extrusion molded products having such complicated shapes, a very high shearing force acts during extrusion molding, and as a result, the temperature of the cement kneaded product rises due to frictional heat, reaching 50 to 90°C in summer.
このような高温時におけるセメント押出成形においては
上記したセメント押出成形品用混和剤のうち、ゲル化点
を有するメチルセルロース、メチルヒドロキシエチルセ
ルロース、メチルヒドロキシグロビルセルロース、ヒド
ロキシプロピルセルロースなどの混和剤は５０〜９０℃
の高温ではゲル化を起すために、セメント押出成形品用
混和剤としての機能が著しく低下し、セメント混練品の
脱水防止機能がな（なり、押出圧力が急激に上昇し、押
゛出成形品の表１ 部平滑性が不良となり、ひび割れな
どを起して正常な成形品が得られないという欠点を有し
ている。一方、ヒドロキシエチルセルロースは、かかる
高温時での押出成形においてもゲル化を起すことはない
が、セメントに対する分散力が欠けており、セメント混
練品の粘着力が不足して押出作業性が悪いという欠点を
有している。In cement extrusion molding at such high temperatures, among the above-mentioned admixtures for cement extrusion molded products, admixtures such as methyl cellulose, methyl hydroxyethyl cellulose, methyl hydroxyglobil cellulose, and hydroxypropyl cellulose, which have a gelling point, are used at a temperature of 50 to 50%. 90℃
Because gelation occurs at high temperatures, its function as an admixture for cement extrusion molded products is significantly reduced, and the dehydration prevention function of cement kneaded products is lost. However, hydroxyethyl cellulose has the drawback that it has poor smoothness and cracks occur, making it impossible to obtain a normal molded product.On the other hand, hydroxyethyl cellulose does not gel even during extrusion molding at such high temperatures. Although this does not occur, it has the disadvantage that it lacks dispersion power with respect to cement, and the cement kneaded product lacks adhesive strength, resulting in poor extrusion workability.
又、エチレンオキサイド重合体、アクリルアミド重合体
およびポリビニルアルコールなどの水溶性高分子は高温
でゲル化を起すことはないが脱水防止機能が劣っている
ため、使用量が多く必要であるという欠点を有しており
、高温時におけるセメント押出成形品用混和剤に最適な
ものはこれまで見出されていないのが現状である。In addition, water-soluble polymers such as ethylene oxide polymers, acrylamide polymers, and polyvinyl alcohol do not gel at high temperatures, but they have poor dehydration prevention function, so they have the disadvantage of requiring large amounts to be used. Currently, no admixture suitable for cement extrusion molded products at high temperatures has been found.
問題点を解決するための手段
本発明者は、かかる難点を解決すべ（鋭意研究した結果
１モル置換度＆６〜１α０の高置換ヒドロキシエチルセ
ルロースをセメント押出成形品用混和剤を用いることに
より、高温時における押出成形においてもゲル化を起さ
ず、しかも少量の添加量で良好な押出成形が可能であり
、−ＩＩ−＃を換度＆５以下のヒドロキシエチルセルロ
ースのものに較ベセメント混線品の粘着力に優れている
ため、美麗な表面平滑性を示すセメント押出成形品を得
ることができることを見出し、本発明を完成するに至っ
た。Means for Solving the Problems The present inventor has devised a solution to these difficulties (as a result of intensive research), by using highly substituted hydroxyethyl cellulose with a degree of 1 molar substitution and 6 to 1α0, it is possible to solve the problem at high temperatures by using an admixture for cement extrusion molded products. It does not cause gelation even in extrusion molding, and good extrusion molding is possible with a small amount of addition, and the adhesive strength of cement mixed products is improved compared to that of hydroxyethyl cellulose with a -II-# conversion rate of &5 or less. The inventors have discovered that it is possible to obtain a cement extrusion molded product exhibiting beautiful surface smoothness due to the excellent surface smoothness, and have completed the present invention.
本発明のセメント押出成形品用混和剤としてのヒドロキ
シエチルセルロースは前記の如＜モル置換度鴇６〜１α
０の高置換ヒドロキシエチルセルロースカ最適である。Hydroxyethylcellulose as an admixture for cement extrusion molded products of the present invention has a molar substitution degree of 6 to 1α as described above.
0 highly substituted hydroxyethyl cellulose is most suitable.
ヒドロキシエチルセルロースのモル置換度が＆５以下で
はセメント混練品の粘着力が不足している為押出作業性
が急く、押出圧力が上昇し、押出成形品の表面平滑性が
不良となり良好なセメント押出成形品が得られない。ま
た、ヒドロキシエチルセルロースのモル置換度か１０以
上のものは合成が困難である。If the degree of molar substitution of hydroxyethyl cellulose is less than &5, the adhesion of the cement kneaded product is insufficient, resulting in rapid extrusion workability, increased extrusion pressure, and poor surface smoothness of the extruded product, resulting in a poor cement extrusion product. is not obtained. Furthermore, it is difficult to synthesize hydroxyethyl cellulose with a molar substitution degree of 10 or more.
本発明に用いられるヒドロキシエチルセルロースの製法
は特に限定されないが公知の方法がそのまま採用される
。一般にはセルロースとエチレンオキサイドをアルカリ
存在下に反応させアルカリ、エチレンオキサイドの童を
変えることにより所望ノモル置換度を有するヒドロキシ
エチルセルロースを得ることができる。具体的には特公
昭３７−２１９９号公報に示された製法等が採用できる
。The method for producing hydroxyethylcellulose used in the present invention is not particularly limited, but known methods can be employed as they are. In general, hydroxyethyl cellulose having a desired nomolar degree of substitution can be obtained by reacting cellulose and ethylene oxide in the presence of an alkali and changing the alkali and ethylene oxide. Specifically, the manufacturing method disclosed in Japanese Patent Publication No. 37-2199 can be adopted.
かかるヒドロキシエチルセルロースとしては、その１％
水溶液粘度が２５℃で５００〜１０，０００ｃｐｓのも
のが適当である。その１％水溶液粘度が２６℃で５００
ｃｓ以下のものは、セメント混練品の粘着力が不足し、
一方１０．０００ ｃ ｐ ｓ 以上のものは合成が困
難である。As such hydroxyethyl cellulose, 1% of the
An aqueous solution having a viscosity of 500 to 10,000 cps at 25°C is suitable. The viscosity of the 1% aqueous solution is 500 at 26℃
If the cement is less than cs, the adhesion of the cement mixture is insufficient,
On the other hand, it is difficult to synthesize those with a density of 10,000 c p s or more.
本発明の混和剤を用いてセメント押出成形品を製造する
方法としては、セメントおよび無機質繊維状物質の一種
もしくは二種以上からなる混合物に本発明に示すセメン
ト押出成形品用混和剤を乾燥状態で添加し、これをニー
ダ−型ミキサーで均一にトライブレンドしたのち、水を
添加して混合しセメント混練品としたのち、この混練品
を押出機に投入して押出成形を行う方法（トライブレン
ド法）があり、このような方法により美麗な押出成形品
を得ることができる。また、セメントと無機質繊維状物
質の一種もしくは二種以上からなる混合物に、本発明に
示すセメント押出成形品用混和剤をあらかじめ水に分散
させたスラリーを添加混合して、セメント混練品とした
のち、押出成形するスラリー法も採用することができる
。A method for manufacturing cement extrusion molded products using the admixture of the present invention is to add the admixture for cement extrusion molded products according to the present invention to a mixture of cement and one or more types of inorganic fibrous substances in a dry state. The mixture is homogeneously tri-blended using a kneader-type mixer, water is added and mixed to form a cement-kneaded product, and the kneaded product is fed into an extruder for extrusion molding (tri-blend method). ), and beautiful extrusion molded products can be obtained by such a method. Furthermore, a slurry in which the admixture for cement extrusion molded products according to the present invention is previously dispersed in water is added to a mixture of cement and one or more types of inorganic fibrous substances to form a cement kneaded product. , a slurry method of extrusion molding can also be adopted.
ここで使用されるセメントとしては、ポルトランドセメ
ント、白色セメント、アルミナセメント、スラッグセメ
ントなど、従来公知の種々の水硬性セメントを使用する
ことができる。また、無機質繊維状物質としては、アス
ベスト、ガラス繊維、岩綿なと通常セメント押出成形品
に使用されるものが使用できる。As the cement used here, various conventionally known hydraulic cements can be used, such as Portland cement, white cement, alumina cement, and slag cement. Further, as the inorganic fibrous material, those normally used in cement extrusion molded products such as asbestos, glass fiber, and rock wool can be used.
上記したセメント、無機質繊維状物質および本発明のセ
メント押出成形品用混和剤の配合量は、セメント１００
部に対して、無機質繊維状物質１５〜８０部、本発明の
混和剤０８〜３部とすればよ（、これに押出しに適当な
流動性を得るに必要な量の水を配合すればよい。The blending amounts of the cement, inorganic fibrous material, and admixture for cement extrusion molded products of the present invention are as follows: cement 100%
15 to 80 parts of the inorganic fibrous material and 08 to 3 parts of the admixture of the present invention (to which an amount of water necessary to obtain appropriate fluidity for extrusion may be added). .
なお、本発明においては前記の各成分以外にも充填剤、
湿潤剤、可塑剤、離型剤、凝結促進剤そ） の他の各種
セメント混和剤を本発明の目的を損わない限り添加して
もよいことは言うまでもない。In addition, in the present invention, in addition to the above-mentioned components, fillers,
It goes without saying that various other cement admixtures such as wetting agents, plasticizers, mold release agents, setting accelerators, etc. may be added as long as they do not impair the purpose of the present invention.
次忙実施例を示して、本発明をさらに詳細に説明する。The present invention will be explained in more detail by showing a few examples.
なお、部はすべて重量部を示す。Note that all parts are by weight.
実施例Ｌ
６０℃の乾燥機中に一昼夜放置したセメント１００部と
アスベスト６Ｄ−４（レイク社）２５部およびモル置換
度４０のヒドロキシエチルセルロース（１％水溶液粘度
５，０００ｃｐｓ ａｔ２５℃）１部とを５０℃に加温
したミキサーに−ダー型）に仕込み、５分間攪拌したの
ち。Example L 100 parts of cement left overnight in a dryer at 60°C, 25 parts of asbestos 6D-4 (Lake Co.) and 1 part of hydroxyethyl cellulose with a molar substitution degree of 40 (1% aqueous solution viscosity 5,000 cps at 25°C) were mixed. The mixture was placed in a mixer heated to 50° C. and stirred for 5 minutes.
５０℃の温水４０部を添加して更に５分間混練し、均一
なセメント混練品を得た。次に、このセメント混練品を
５０℃に加温した圧縮土練器に充填し、テンシロン（万
能試験機）により圧縮押出し試験を行い、押出作業性と
して押出エネルギーの測定と押出品の表面平滑性および
セメント混練品の粘着力を評価した結果、表１に示す通
り押出エネルギーが低く、粘着力があり、表面平滑性が
良好な押出品を得た。40 parts of 50°C warm water was added and kneaded for an additional 5 minutes to obtain a uniform cement kneaded product. Next, this cement kneaded product was filled into a compression kneader heated to 50℃, and a compression extrusion test was performed using Tensilon (universal testing machine), and the extrusion energy was measured and the surface smoothness of the extruded product As a result of evaluating the adhesive strength of the cement kneaded product, as shown in Table 1, an extruded product with low extrusion energy, adhesive strength, and good surface smoothness was obtained.
実施例２〜７
表１に示すヒドロキシエチルセルロース（１チ水溶液粘
度５，０００ｃｐｓ ａｔ ２５℃）のモル置換度およ
び押出温度で実施例１と同様の押出し試験を行った結果
、いずれも押出エネルギーが低（、粘着力があり、表面
平滑性が良好な押出品を得た。Examples 2 to 7 Extrusion tests similar to those in Example 1 were conducted using the molar substitution degree and extrusion temperature of hydroxyethyl cellulose (100% aqueous solution viscosity 5,000 cps at 25°C) shown in Table 1, and the extrusion energy was low in all cases. (An extruded product with adhesive strength and good surface smoothness was obtained.
比較例１゜
６０℃の乾燥機中に一昼夜放置したセメント１００部と
アスベスト６Ｄ−４（レイク社）２６部およびモル置換
度９−Ｏのヒドロキシエチルセルロース（１％水溶液粘
度５，０００ｃｐｓ ａｔ ２５℃）１部とを６０℃に
加温したミキサーに−ダー型）に仕込み、５分間攪拌し
たのち、５０℃の温水４０部を添加して、更に６分間混
練し均一なセメント混練品を得た。次に１このセメント
混練品を５０℃に加温した圧縮土練器に充填シ、テンシ
ロン（万能試験機〕により圧縮押出し試験を行い、実施
例１と同じ評価を行った結果、表１に示す通り押出エネ
ルギーが高（、粘着力に欠け、表面平滑性の劣る押出品
しか゛得られなかった。Comparative Example 1 100 parts of cement, 26 parts of asbestos 6D-4 (Lake Co., Ltd.) and hydroxyethyl cellulose with a molar substitution degree of 9-O (1% aqueous solution viscosity 5,000 cps at 25°C) left overnight in a dryer at 60°C. After 5 minutes of stirring, 40 parts of 50°C warm water was added and kneaded for another 6 minutes to obtain a uniform cement mixture. Next, 1. This cement kneaded product was packed into a compression kneader heated to 50°C, and a compression extrusion test was performed using Tensilon (universal testing machine). The same evaluation as in Example 1 was performed, and the results are shown in Table 1. As a result, only extruded products with high extrusion energy and poor adhesion and poor surface smoothness were obtained.
比較例２゜
表１に示すヒドロキシエチルセルロース（１チ水溶液粘
度へ０００ｃｐｓ ａｔ ２５℃）で比較例１と同様の
押出し試験を行った結果、表１に示す導り押出エネルギ
ーが高（、粘着力がなく表面平滑性の悪い押出品しか得
られなかった。Comparative Example 2 An extrusion test similar to that in Comparative Example 1 was conducted using hydroxyethyl cellulose shown in Table 1 (viscosity of 1000 cps at 25°C) as shown in Table 1. However, only extruded products with poor surface smoothness were obtained.
比較例＆
実施例１に於て、混和剤としてメチルヒドロキシグロビ
ルセルロース（１％水ｇ液粘１１ｓ４゜ｃｐｓａｔ２５
℃）を１．０部添加して同様の押出し試験を行った結果
、表１に示す通り押出エネルギーが高（、粘着力がなく
、表面平滑性の劣る押出品しか得られなかった。In Comparative Example & Example 1, methyl hydroxyglobil cellulose (1% water g liquid viscosity 11s4゜cpsat25
A similar extrusion test was carried out with the addition of 1.0 part of 1.0 parts of 1.0 °C). As shown in Table 1, only extruded products with high extrusion energy, no adhesive strength, and poor surface smoothness were obtained.
Claims (1)
ロースよりなるセメント押出成形品用混和剤。An admixture for cement extrusion molded products made of highly substituted hydroxyethyl cellulose having a molar substitution degree of a6 to 1α0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9455884A JPS60239348A (en) | 1984-05-14 | 1984-05-14 | Admixer for cement extrusion moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9455884A JPS60239348A (en) | 1984-05-14 | 1984-05-14 | Admixer for cement extrusion moldings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60239348A true JPS60239348A (en) | 1985-11-28 |
| JPH0515654B2 JPH0515654B2 (en) | 1993-03-02 |
Family
ID=14113651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9455884A Granted JPS60239348A (en) | 1984-05-14 | 1984-05-14 | Admixer for cement extrusion moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60239348A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102154A (en) * | 1988-10-11 | 1990-04-13 | Hakutou Kagaku Kk | Admixture for fiber-reinforced concrete |
| EP1346968A1 (en) * | 2002-03-11 | 2003-09-24 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| US6843845B2 (en) * | 2002-03-11 | 2005-01-18 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
-
1984
- 1984-05-14 JP JP9455884A patent/JPS60239348A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02102154A (en) * | 1988-10-11 | 1990-04-13 | Hakutou Kagaku Kk | Admixture for fiber-reinforced concrete |
| EP1346968A1 (en) * | 2002-03-11 | 2003-09-24 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| US6811605B2 (en) | 2002-03-11 | 2004-11-02 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
| US6843845B2 (en) * | 2002-03-11 | 2005-01-18 | Shin-Etsu Chemical Co., Ltd. | Admixture and extrudable hydraulic composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0515654B2 (en) | 1993-03-02 |
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