JPS5913477B2 - Cement board manufacturing method - Google Patents
Cement board manufacturing methodInfo
- Publication number
- JPS5913477B2 JPS5913477B2 JP4578779A JP4578779A JPS5913477B2 JP S5913477 B2 JPS5913477 B2 JP S5913477B2 JP 4578779 A JP4578779 A JP 4578779A JP 4578779 A JP4578779 A JP 4578779A JP S5913477 B2 JPS5913477 B2 JP S5913477B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- substrate
- cement
- cement board
- blast furnace
- 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
Links
- 239000004568 cement Substances 0.000 title claims description 33
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000002002 slurry Substances 0.000 claims description 23
- 239000000758 substrate Substances 0.000 claims description 21
- 239000002893 slag Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000003513 alkali Substances 0.000 description 8
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- 238000006253 efflorescence Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 206010037844 rash Diseases 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 2
- 239000002320 enamel (paints) Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Producing Shaped Articles From Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
【発明の詳細な説明】
この発明は主に建築材料として使用されるセメント板の
製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing cement board, which is mainly used as a building material.
石綿を含有するいわゆる石綿セメント板など、従来建築
材料として使用されてきたセメント板には、永年の使用
によりセメントのアルカリがセメント板の表面に溶出し
、白華と呼ばれる表面変色現象を起こしてしばしばセメ
ント板の美感を損うという問題があつた。この白華を防
ぐための方法として外側にアルカリをよく吸収する、高
炉水砕スラグを主成分とする外層をもうけたセメント板
が考えられる。この発明はこのような、高炉水砕スラグ
を主成分とする外層を有するセメント板の経済的な製造
方法を提供することを目的としており、これを以下に説
明する。この発明にかかるセメント板の製造方法は、あ
５ らかじめ成形した、セメントを主成分とする基板の
外面に、水で混練した高炉水砕スラグを主成分とするス
ラリからなるスラリ層を形成せしめ、このスラリ層ごと
基板を加圧成形することを特徴としている。Cement boards that have traditionally been used as building materials, such as so-called asbestos-cement boards that contain asbestos, often have the alkali of the cement leached onto the surface of the cement board due to long-term use, causing a surface discoloration phenomenon called efflorescence. There was a problem that the aesthetic appearance of the cement board was damaged. A possible way to prevent this efflorescence is to use a cement board with an outer layer mainly composed of granulated blast furnace slag, which absorbs alkali well. The object of the present invention is to provide an economical method for producing a cement board having an outer layer mainly composed of granulated blast furnace slag, which will be described below. The method for manufacturing a cement board according to the present invention includes: (5) forming a slurry layer made of a slurry mainly composed of granulated blast furnace slag kneaded with water on the outer surface of a preformed substrate mainly composed of cement; This method is characterized in that the substrate is pressure-molded together with this slurry layer.
基板は普通抄造によつて成形され、セ１０メントの他に
補強用の石綿、ガラス繊維、有機物繊維（例えばパルプ
、ポリビニルフオルマール、ナイロン、ポリエステルな
どの繊維）などを含むのが一般的である。この基板の外
面に形成せしめる、水で混練したスラリ層は高炉水砕ス
ラグ（一１５般に粉末状）のほか同様な目的で少量の石
綿を含有せしめるのが普通であり、場合によつては少量
の着色用顔料が添加されることもある。高炉水砕スラグ
を主成分とし、セメントを含有しないこのようなスラリ
はアルカリが存在しないとうまく凝２０結硬化しないが
、セメントを主成分とする基板の外面にスラリ層を形成
せしめたのち全体を加圧成形すると、基板中のアルカリ
がスラグ層中に溶出するので、スラリが脱水されるとと
もに凝結硬化が進行し、外側に高炉水砕スラグを主成分
とする２５外層をもつセメント板が得られるのである。
このようにセメント板の加圧成形とスラリ層の脱水およ
び凝結硬化が同時に行なわれるのできわめて能率的であ
り、かつ凝結硬化用のアルカリをあらかじめスラリ中に
添加しておく必要がないので結局３０この発明にかかる
セメント板の製造方法はきわめて経済的であると言える
。なお、基板中のアルカリの外層への移行を効果的に行
なわしめるため、外層を下側にして加圧成形するのが好
ましい。また、高炉水砕スラグ粉末は一般に濾水性が良
いの３５で、これを主成分とする層を外面に形成せしめ
た状態でカロ圧成形する場合はセメント板の離型性が良
いという利点もある。なお、凝結硬化用のアルカリをあ
らかじめスラリ中に添加しておくのはスラリの保存性（
ポツトライフ）の点で好ましくなく、この発明における
如く、スラリは水で混練しておき、後で基板のセメント
から溶出するアルカリを利用することとする方が優れて
いると言える。次にこの発明の実施例について説明する
。〔実施例〕
抄造により次の組成をもつ基板を成形した。The substrate is usually formed by papermaking, and generally contains reinforcing asbestos, glass fiber, organic fibers (for example, pulp, polyvinyl formal, nylon, polyester fibers, etc.) in addition to cement. be. The slurry layer mixed with water and formed on the outer surface of the substrate usually contains granulated blast furnace slag (generally in powder form) and a small amount of asbestos for the same purpose. Small amounts of coloring pigments may also be added. This type of slurry, which is mainly composed of granulated blast furnace slag and does not contain cement, will not solidify properly in the absence of an alkali, but after forming a slurry layer on the outer surface of a substrate whose main component is cement, When pressure molding is performed, the alkali in the substrate is eluted into the slag layer, so the slurry is dehydrated and hardening progresses, resulting in a cement board with an outer layer of 25 layers mainly composed of granulated blast furnace slag. It is.
In this way, the pressure forming of the cement board and the dehydration and setting hardening of the slurry layer are carried out simultaneously, which is extremely efficient, and since there is no need to add alkali for setting hardening to the slurry in advance, it is possible to It can be said that the method of manufacturing a cement board according to the invention is extremely economical. Note that in order to effectively transfer the alkali in the substrate to the outer layer, it is preferable to perform pressure molding with the outer layer facing down. In addition, granulated blast furnace slag powder generally has good freeness35, and when a layer containing this powder as the main component is formed on the outer surface and is subjected to Calorie pressure molding, it has the advantage that the cement board has good mold releasability. . Note that adding alkali for coagulation and hardening to the slurry in advance improves the shelf life of the slurry (
However, it is preferable to knead the slurry with water and then use the alkali eluted from the cement of the substrate as in the present invention. Next, embodiments of the invention will be described. [Example] A substrate having the following composition was formed by papermaking.
以下「部」とは重量部を言う。セメント
７０部
石 綿 １５部有機繊維（パ
ルプ） ２部
この基板の外面に水で混練した、水以外の組成が次に示
すようなスラリを散布し、スラリ層を形成せしめたのち
全体を表面に対し垂直方向に約８０Ｋｇ／Ｃｌ！ｌの圧
力で約１０秒間加圧成形した。Hereinafter, "part" refers to part by weight. cement
70 parts Asbestos 15 parts Organic fiber (pulp) 2 parts A slurry kneaded with water and having the composition other than water as shown below is sprayed on the outer surface of this substrate to form a slurry layer, and then the whole is applied to the surface. Approximately 80Kg/Cl in the vertical direction! Pressure molding was carried out for about 10 seconds at a pressure of 1 liter.
高炉水砕スラグ（粉末状） １００部石 綿
４部顔 料
３部これにより全体が脱水され、スラリの凝結
硬化が始まつて基板の外面に高炉水砕スラグを主成分と
する外層が形成された。Granulated blast furnace slag (powder) 100 parts Asbestos
4 parts pigment
Part 3 As a result, the entire slurry was dehydrated, the slurry began to solidify and harden, and an outer layer mainly composed of granulated blast furnace slag was formed on the outer surface of the substrate.
基板の厚みは約７ｍｍ１外層の厚みは約０．２ｍｍであ
つた。このようにして製造されたセメント板の表面に水
性アクリル樹脂エマルジヨン（大日本インキ化学工業社
製、商標名ホンコート８３５）を塗布したのち、相対湿
度約９０％、温度約７０℃の雰囲気に１０時間さらし、
以後３週間の自然養生を施こした。最後に、表面にさら
にエナメル塗装を行ない美麗なセメント板を得た。この
セメント板の構造を第１図に示す。図中１は基板、２は
外層、３ａは水性アクリル樹脂エマルジヨンによる塗料
層、３ｂはエナメル塗料層である。このようにして得ら
れたセメント板は長時間を経過したあとも白華を生じる
ことがなく、美麗な表面を保つたままであつた。なお、
基板の組成としてセメント５０〜９０部、石綿１０〜２
０部、有機繊維０〜３部、高炉水砕スラグＯ〜４０部の
範囲のものを、また外層を形成するためのスラリの水以
外の組成として高炉水砕スラグ１００部、石綿２〜６部
、顔料０〜７部の範囲のものを選べば同様に優れたセメ
ント板を経済的に製造することができた。セメント板の
寸法は、基板の厚みを４〜１０ｒ１Ｌｍ１外層の厚みを
０．０５〜２．０騙、好ましくは０．１〜０．３ｍ７！
Ｌとするのが実用的である。以上に説明した如く、この
発明にかかるセメント板の製造方法はあらかじめ成形し
た、セメントを主成分とする基板の外面に、水で混練し
た高炉水砕スラグを主成分とするスラリからなるスラリ
層を形成せしめ、このスラリ層ごと基板を加圧成形する
ことを特徴としているので、基板の外側に高炉水砕スラ
グを主成分とする外層を有する、白華現象の起こりにく
いセメント板を経済的に製造することができるのである
。The thickness of the substrate was approximately 7 mm, and the thickness of the outer layer was approximately 0.2 mm. After applying a water-based acrylic resin emulsion (manufactured by Dainippon Ink & Chemicals Co., Ltd., trade name: Honcoat 835) to the surface of the cement board manufactured in this way, it was placed in an atmosphere with a relative humidity of about 90% and a temperature of about 70°C for 10 hours. exposed,
Thereafter, natural curing was performed for 3 weeks. Finally, the surface was further coated with enamel to obtain a beautiful cement board. The structure of this cement board is shown in Figure 1. In the figure, 1 is a substrate, 2 is an outer layer, 3a is a paint layer made of water-based acrylic resin emulsion, and 3b is an enamel paint layer. The cement board thus obtained did not develop efflorescence even after a long period of time and maintained a beautiful surface. In addition,
The composition of the substrate is 50 to 90 parts of cement and 10 to 2 parts of asbestos.
0 parts, organic fibers 0 to 3 parts, and granulated blast furnace slag in the range of 0 to 40 parts, and as a composition other than water of the slurry for forming the outer layer, 100 parts of granulated blast furnace slag, and 2 to 6 parts of asbestos. , in the range of 0 to 7 parts of pigment, similarly excellent cement boards could be produced economically. The dimensions of the cement board are as follows: the thickness of the substrate is 4 to 10 m, the thickness of the outer layer is 0.05 to 2.0 m, preferably 0.1 to 0.3 m7!
It is practical to set it to L. As explained above, the method for manufacturing a cement board according to the present invention is to apply a slurry layer made of a slurry mainly composed of granulated blast furnace slag kneaded with water to the outer surface of a pre-formed substrate mainly composed of cement. This method is characterized by forming the slurry layer together with the substrate under pressure, so it is possible to economically produce cement boards that are resistant to efflorescence and have an outer layer mainly composed of granulated blast furnace slag on the outside of the substrate. It is possible.
第１図はこの発明にかかる製造方法により製造したセメ
ント板の例を示す断面図である。
１・・・・・・基板、２・・・・・・外層、３ａ・・・
・・・水性アクリル樹脂エマルジヨンによる塗料層、３
ｂ・・・・・・エナメル塗料層。FIG. 1 is a sectional view showing an example of a cement board manufactured by the manufacturing method according to the present invention. 1...Substrate, 2...Outer layer, 3a...
...Paint layer made of water-based acrylic resin emulsion, 3
b...Enamel paint layer.
Claims (1)
の外面に、水で混練した高炉水砕スラグを主成分とする
スラリからなるスラリ層を形成せしめ、このスラリ層ご
と基板を加圧成形することを特徴とするセメント板の製
造方法。1 A slurry layer consisting of a slurry whose main component is granulated blast furnace slag kneaded with water is formed on the outer surface of a pre-formed substrate whose main component is cement, and the substrate is pressure-molded together with this slurry layer. Characteristic cement board manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4578779A JPS5913477B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4578779A JPS5913477B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55140781A JPS55140781A (en) | 1980-11-04 |
| JPS5913477B2 true JPS5913477B2 (en) | 1984-03-29 |
Family
ID=12728984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4578779A Expired JPS5913477B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5913477B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6254959U (en) * | 1985-09-26 | 1987-04-06 | ||
| JPH0266470U (en) * | 1988-11-09 | 1990-05-18 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5888066A (en) * | 1981-11-19 | 1983-05-26 | Chiyoda Tech & Ind Co Ltd | Coating method and apparatus of mortar |
-
1979
- 1979-04-13 JP JP4578779A patent/JPS5913477B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6254959U (en) * | 1985-09-26 | 1987-04-06 | ||
| JPH0266470U (en) * | 1988-11-09 | 1990-05-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55140781A (en) | 1980-11-04 |
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