JPS5829270B2 - Cement board manufacturing method - Google Patents
Cement board manufacturing methodInfo
- Publication number
- JPS5829270B2 JPS5829270B2 JP4578879A JP4578879A JPS5829270B2 JP S5829270 B2 JPS5829270 B2 JP S5829270B2 JP 4578879 A JP4578879 A JP 4578879A JP 4578879 A JP4578879 A JP 4578879A JP S5829270 B2 JPS5829270 B2 JP S5829270B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- cement board
- cement
- substrate
- 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 35
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002002 slurry Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000002893 slag Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 description 10
- 239000010425 asbestos Substances 0.000 description 7
- 229910052895 riebeckite Inorganic materials 0.000 description 7
- 238000006253 efflorescence Methods 0.000 description 5
- 206010037844 rash Diseases 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000000203 mixture Substances 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
- 239000000843 powder Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 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
- 239000002585 base 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
- 230000001771 impaired effect Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Aftertreatments Of Artificial And Natural Stones (AREA)
- Producing Shaped Articles From Materials (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、長時間の使
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った。Cement boards that have traditionally been used as building materials, such as so-called asbestos-cement boards that contain asbestos, are susceptible to the alkali of the cement leaching onto the surface of the cement board over long periods of use, causing a surface discoloration phenomenon called efflorescence. There is often a problem that the aesthetic appearance of the cement board is impaired.
この白華を防ぐための方法として、外側にアルカＩＪ
ｋ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。As a way to prevent this efflorescence, use Arca IJ on the outside.
A cement board with an outer layer mainly composed of granulated blast furnace slag, which absorbs k well, is considered.
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を得るとともに、セメント板の製
造に必要な抄造用水（普通は循環させて使用する）のア
ルカリ濃度の上昇を抑制し、ひいては廃水処理を容易に
することかできるようなセメント板の製造方法を提供す
ることを目的としており、以下にこれを説明する。The present invention not only obtains a cement board having an outer layer mainly composed of granulated blast furnace slag, but also suppresses an increase in the alkaline concentration of papermaking water (usually used in circulation) necessary for manufacturing the cement board. The purpose of the present invention is to provide a method for manufacturing cement boards that can facilitate the treatment of wastewater, which will be explained below.
この発明にかかるセメント板の製造方法は、抄造により
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、抄造用循環水を用いて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することを特徴としている。In the method for manufacturing a cement board according to the present invention, a slurry consisting of a slurry mainly composed of granulated blast furnace slag kneaded using circulating water for papermaking is applied to the outer surface of a substrate mainly composed of "cement" formed in advance by papermaking. The method is characterized by forming a slurry layer and applying pressure to the substrate together with this slurry layer.
基板には主成分であるセ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、ポリビニルフォ
ルマール、ナイロン、ポリエステルなどの繊維）などが
添加されるのが普通である。In addition to cement as the main component, reinforcing asbestos, glass fibers, organic fibers (for example, pulp, polyvinyl formal, nylon, polyester fibers, etc.) are usually added to the substrate.
この基板の外面に形成せしめるスラリ層のスラリは、主
成分である高炉水砕スラグ（一般に粉末状）と少量の補
強用石綿および必要に応じて少量の着色用顔料を、基板
の抄造に使用する抄造用水（普通は循環水）を用いて混
練し調整する。The slurry of the slurry layer formed on the outer surface of the substrate is made of granulated blast furnace slag (generally in powder form) as the main ingredients, a small amount of asbestos for reinforcement, and a small amount of pigment for coloring if necessary. Knead and adjust using water for papermaking (usually circulating water).
高炉水砕スラグを主成分とし、セメントなどを含有しな
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
結硬化しないか、その混線に用いる抄造用水中にはセメ
ントを主成分とする基板を抄造したことからくる多量の
アルカリが含まれており、これによって効果的に凝結硬
化が進行するのである。This type of slurry, which is mainly composed of granulated blast furnace slag and does not contain cement, may not solidify and harden properly in the absence of an alkali, or the papermaking water used for the crosstalk may contain a substrate containing cement as the main component. Contains a large amount of alkali, which causes effective setting and hardening.
一方、循環使用される抄造用水中には慶事なる使用によ
りセメントのアルカリか多量に溶は込んで次第にアルカ
リ濃度が高くなり実用上及び廃水処理上問題となること
が多かったが、このように抄造用水をスラリの混線に使
用することとすれば、水中のアルカリは高炉水砕スラグ
に吸収されるので抄造用水中のアルカリ濃度の上昇を抑
えることに役立ち、結局抄造用水の廃水処理を容易にす
ることになるのである。On the other hand, due to the auspicious use of recycled water for papermaking, a large amount of alkali from cement is dissolved, and the alkali concentration gradually increases, which often causes problems in terms of practical use and wastewater treatment. If industrial water is used to mix slurry, the alkali in the water will be absorbed by the granulated blast furnace slag, which will help to suppress the increase in alkaline concentration in the papermaking water, which will eventually make wastewater treatment of the papermaking water easier. That's what happens.
なお、高炉水砕スラグを特徴とする特許リの凝結硬化の
ためのアルカリとして抄造用水中のアルカリを利用する
ので、混線用水に特別にアルカリを添加する必要がなく
、この点で経済的でもある。In addition, since the alkali in the papermaking water is used as the alkali for the coagulation and hardening of the patented method, which features granulated blast furnace slag, there is no need to specifically add alkali to the mixing water, and in this respect it is also economical. .
このように、外面にスラリ層を形成せしめた基板はスラ
リとと加圧される。In this way, the substrate with the slurry layer formed on its outer surface is pressed into a slurry.
この加圧によりスラリは脱水され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る。This pressurization dehydrates the slurry and forms an outer layer mainly composed of granulated blast furnace slag on the outer surface of the substrate.
この外層はセメント板の使用に際し、基体から溶出して
くるアルカリを吸収し、白華が生じるのを防止するとい
う役目をもつのである。This outer layer has the role of absorbing alkali eluted from the base and preventing efflorescence when the cement board is used.
セメント板の製造において、抄造により成形した基板を
あらかじめ加圧成形しておきその後外面にスラリ層を形
成せしめて再び加圧することとしてもよいが、抄造によ
り得られた基板をあらかじめ加圧することなく外面にス
ラリ層を形成せしめ、そこでスラリ層ごと加圧成形する
こととした方が脱水と加圧成形とを同時に行なうことが
できるので能率的である。In the production of cement boards, it is also possible to pressure-form the substrate formed by paper-making in advance and then form a slurry layer on the outer surface and pressurize it again. It is more efficient to form a slurry layer and then press-form the entire slurry layer, since dehydration and pressure-forming can be performed simultaneously.
また、高炉水砕スラグ粉末は一般に濾水性が良いので、
これを主成分とする層を外面に形成せしめた状態で加圧
成形する方がセメント板の離型性が良いと言う利点もあ
る。In addition, granulated blast furnace slag powder generally has good freeness, so
Pressure molding with a layer containing this as a main component formed on the outer surface has the advantage that the releasability of the cement board is better.
次にこの発明の実施例について説明する。Next, embodiments of the invention will be described.
実施例 抄造により次の組成をもつ基板を成形した。Example A substrate with the following composition was formed by papermaking.
以下「部」とは重量部を言う。Hereinafter, "part" refers to part by weight.
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、基板を抄造する際に用いた抄造用水
を使用して混練した、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８０に９／ｃｕｔの圧力で約１０秒
間加圧成形した。Cement 70 parts Asbestos 15 parts Organic fiber (pulp) 2 parts Sprinkle slurry on the outer surface of this substrate, which was kneaded using the paper-making water used in paper-making the substrate and whose composition other than water is as shown below. After forming a slurry layer, the whole was press-molded for about 10 seconds at a pressure of about 80:9/cut in a direction perpendicular to the surface.
高炉水砕スラグ（粉末状） １００部
石 綿 ４部
顔 料 ３部
これにより全体か脱水され、スラリの凝結硬化が進行し
、基板の外面に高炉水砕スラグを主成分とする材層が形
成された。Granulated blast furnace slag (powder) 100 parts Asbestos 4 parts Pigment 3 parts As a result, the entire slurry is dehydrated, solidification and hardening of the slurry progresses, and a material layer mainly composed of granulated blast furnace slag is formed on the outer surface of the substrate. It was done.
基板の厚みは約７ｍｒｎ−外層の厚みは約０．２１ａｍ
であった。The thickness of the substrate is approximately 7 mrn - the thickness of the outer layer is approximately 0.21 am
Met.
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
リル樹脂エマルジョン（犬日本インキ化学工業社製、商
標名ボンコーｔ−８３５）を塗布したのち、相対湿度約
９０優、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。After applying a water-based acrylic resin emulsion (manufactured by Inu Nippon Ink Chemical Co., Ltd., trade name: Boncoat T-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 or more and a temperature of about 70°C. After being exposed for 10 hours, natural curing was performed for 3 weeks.
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。Finally, the surface was further coated with enamel to obtain a beautiful cement board.
このセメント板の構造を第１図に示す。The structure of this cement board is shown in Figure 1.
図中１は基板、２は外層、３ａは水性アクリル樹脂エマ
ルジョンによる塗料層、３ｂはエナメル塗料層である。In the figure, 1 is a substrate, 2 is an outer layer, 3a is a paint layer made of an aqueous acrylic resin emulsion, and 3b is an enamel paint layer.
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、美麗な表面を保ったま
まであった。The cement board thus obtained did not develop efflorescence even after a long period of time had passed, and maintained a beautiful surface.
なお、基板の組成としてセメント５０〜９０部、石綿１
０〜２０部、有機繊維０〜３部、高炉水砕スラグ０〜４
０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の製造
方法により優れたセメント板を得ることができた。The composition of the substrate is 50 to 90 parts of cement and 1 part of asbestos.
0-20 parts, organic fiber 0-3 parts, granulated blast furnace slag 0-4
100 parts of granulated blast furnace slag, 2 parts of asbestos as the composition other than water of the slurry for forming the outer layer.
6 parts and pigment in the range of 0 to 7 parts, an excellent cement board could be obtained by the same manufacturing method.
セメント板の寸法は、基板の厚みを４〜１０ｍｍ、外層
の厚みを０．０５〜２．０ｍｍ、好ましくは０．１〜０
．３ｍｍとするのが実用的である。The dimensions of the cement board include a substrate thickness of 4 to 10 mm, an outer layer thickness of 0.05 to 2.0 mm, preferably 0.1 to 0.0 mm.
．． It is practical to set it to 3 mm.
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、抄造により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、抄造用循環水を用いて混練した
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することを
特徴とするので、白華の生じない優れたセメント板を得
るに際し、そのセメント板の製造に必要な抄造用水のア
ルカリ濃度の上昇を抑制し、廃水処理を容易にすること
が可能となった。As explained above, the method for manufacturing a cement board according to the present invention involves mixing granulated blast furnace slag, which is mainly composed of granulated blast furnace slag, which has been kneaded using circulating water for paper-making, on the outer surface of a substrate whose main component is cement, which has been preformed by paper-making. It is characterized by forming a slurry layer made of slurry and pressurizing the substrate together with this slurry layer, so when obtaining an excellent cement board that does not cause efflorescence, the alkaline concentration of the papermaking water necessary for manufacturing the cement board can be reduced. This makes it possible to suppress the rise in water levels and facilitate wastewater treatment.
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ョンによる塗料層、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)
する基板の外面に、抄造用循環水を用いて混練した高炉
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 using circulating water for paper making is formed on the outer surface of a substrate pre-formed by papermaking and whose main component is cement If, and the substrate together with this slurry layer is A method for manufacturing a cement board characterized by applying pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4578879A JPS5829270B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4578879A JPS5829270B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55140782A JPS55140782A (en) | 1980-11-04 |
| JPS5829270B2 true JPS5829270B2 (en) | 1983-06-21 |
Family
ID=12729011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4578879A Expired JPS5829270B2 (en) | 1979-04-13 | 1979-04-13 | Cement board manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5829270B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8486271B2 (en) * | 2009-06-26 | 2013-07-16 | James Hardie Technology Limited | Environmentally-friendly cementitious articles, formulations, methods of making and uses |
-
1979
- 1979-04-13 JP JP4578879A patent/JPS5829270B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55140782A (en) | 1980-11-04 |
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