JPH07267710A - Production of cement plate - Google Patents
Production of cement plateInfo
- Publication number
- JPH07267710A JPH07267710A JP5706094A JP5706094A JPH07267710A JP H07267710 A JPH07267710 A JP H07267710A JP 5706094 A JP5706094 A JP 5706094A JP 5706094 A JP5706094 A JP 5706094A JP H07267710 A JPH07267710 A JP H07267710A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- pts
- vinylidene chloride
- chloride copolymer
- aggregate
- 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.)
- Withdrawn
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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00129—Extrudable mixtures
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)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメント板の製造方法
に関し、具体的には押出成形によるセメント板の製造方
法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a cement board, and more particularly to a method for manufacturing a cement board by extrusion molding.
【０００２】[0002]
【従来の技術】従来、外装材や屋根材に用いられるセメ
ント板は、軽量化のため、水硬性セメント、及び骨材と
共に、軽量化剤を混合したセメント組成物を作製し、こ
のセメント組成物に水を添加し混練し、押出成形して得
られる。この軽量化剤として、パーライトやシラスバル
ーンが汎用されているが、より軽量化を図るものとし
て、塩化ビニリデンの共重合体が知られている。しか
し、近年、多数の瓦を用いる屋根パネルの採用により、
さらなる軽量化が望まれ、絶乾比重がより小さいなセメ
ント板が求められている。2. Description of the Related Art Conventionally, cement plates used for exterior materials and roofing materials have been manufactured by mixing a hydraulic cement and an aggregate together with a lightening agent to reduce the weight. It is obtained by adding water to kneading, kneading, and extruding. Perlite and shirasu balloon are commonly used as the weight-reducing agent, and a vinylidene chloride copolymer is known as a material for reducing the weight. However, in recent years, with the adoption of roof panels that use a large number of roof tiles,
Further weight reduction is desired, and a cement plate having a smaller absolute dry specific gravity is required.
【０００３】[0003]
【発明が解決しようとする課題】本発明は上述の事実に
鑑みてなされたもので、その目的とするところは、絶乾
比重のより小さいセメント板が得られるセメント板の製
造方法を提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned facts, and an object of the present invention is to provide a method for producing a cement plate which can obtain a cement plate having a smaller absolute dry specific gravity. It is in.
【０００４】[0004]
【課題を解決するための手段】本発明の請求項１に係る
セメント板の製造方法は、水硬性セメント、及び骨材を
主成分とするセメント組成物を混合した後に、水、及
び、塩化ビニリデンの共重合体を添加した混練物を押出
成形し、養生することを特徴とする。The method for manufacturing a cement board according to claim 1 of the present invention is a method for mixing a hydraulic cement and a cement composition containing an aggregate as a main component, followed by water and vinylidene chloride. The kneaded product to which the copolymer of (1) is added is extrusion-molded and cured.
【０００５】本発明の請求項２に係るセメント板の製造
方法は、請求項１記載のセメント板の製造方法におい
て、上記塩化ビニリデンの共重合体が、上記セメント組
成物１００重量部に対し、０．１〜１重量部の割合で添
加することを特徴とする。The method for producing a cement board according to claim 2 of the present invention is the method for producing a cement board according to claim 1, wherein the vinylidene chloride copolymer is used in an amount of 0 parts by weight per 100 parts by weight of the cement composition. 0.1 to 1 part by weight is added.
【０００６】以下、本発明を詳細に説明する。本発明の
セメント板の製造方法は、先ず、水硬性セメント、及び
骨材を主成分として混合し、セメント組成物を得る。上
記水硬性セメントとしては、ポルトランドセメント、ア
ルミナセメント、マグネシアセメント等が挙げられる。
上記骨材は、特に限定せず、珪石粉等が挙げられる。上
記セメント組成物には、水硬性セメント、及び骨材と共
に、補強繊維や増粘剤が混合される。上記補強繊維は、
例えば、ポリプロピレン繊維、パルプ等の有機繊維、ガ
ラス繊維、アスベスト繊維、カーボン繊維等の無機繊維
が挙げられる。上記増粘剤としては、例えば、メチルセ
ルロースが挙げられる。上記成分をアイリッヒミキサー
等で混合し、セメント組成物が作製される。The present invention will be described in detail below. In the method for producing a cement board of the present invention, first, hydraulic cement and aggregate are mixed as main components to obtain a cement composition. Examples of the hydraulic cement include Portland cement, alumina cement, magnesia cement and the like.
The aggregate is not particularly limited, and examples thereof include silica stone powder and the like. A reinforcing fiber and a thickener are mixed with the cement composition together with the hydraulic cement and the aggregate. The reinforcing fiber is
Examples thereof include organic fibers such as polypropylene fiber and pulp, and inorganic fibers such as glass fiber, asbestos fiber and carbon fiber. Examples of the thickener include methyl cellulose. The above components are mixed with an Erich mixer or the like to prepare a cement composition.
【０００７】本発明においては、上記セメント組成物を
作製した後に、水と塩化ビニリデンの共重合体（以下塩
化ビニリデン共重合体と記す）を添加し混練する。上記
塩化ビニリデン共重合体としては、塩化ビニリデンとア
クリロニトリルの共重合体が挙げられる。上記塩化ビニ
リデン共重合体の添加量は特に限定しないが、上記セメ
ント組成物１００重量部に対し、塩化ビニリデン共重合
体０．１〜１重量部が適する。上記塩化ビニリデンの共
重合体を上記範囲で添加すると、絶乾比重が小さいセメ
ント板が得られる。上記塩化ビニリデン共重合体を水硬
性セメント、及び骨材を混合した後に添加するので、塩
化ビニリデン共重合体の混練される時間が少なくてす
み、塩化ビニリデン共重合体の粒子が破壊されることを
防ぐことができる。また、水と共に添加するので、セメ
ント組成物中への分散が容易である。その結果、水硬性
セメントや骨材と共にセメント組成物中に塩化ビニリデ
ン共重合体を混合した場合と比較して、より絶乾比重の
小さいセメント板が作製できる。なお、絶乾比重は１０
０〜１２０℃で十分に乾燥させた状態で測定した比重で
ある。In the present invention, after the above cement composition is prepared, a copolymer of water and vinylidene chloride (hereinafter referred to as vinylidene chloride copolymer) is added and kneaded. Examples of the vinylidene chloride copolymer include a copolymer of vinylidene chloride and acrylonitrile. The addition amount of the vinylidene chloride copolymer is not particularly limited, but 0.1 to 1 part by weight of the vinylidene chloride copolymer is suitable for 100 parts by weight of the cement composition. When the above vinylidene chloride copolymer is added within the above range, a cement board having a small absolute dry specific gravity can be obtained. Since the vinylidene chloride copolymer is added after mixing the hydraulic cement, and the aggregate, the time for kneading the vinylidene chloride copolymer is small, and the particles of the vinylidene chloride copolymer are destroyed. Can be prevented. Moreover, since it is added together with water, it is easy to disperse it in the cement composition. As a result, a cement board having a smaller absolute dry specific gravity can be produced as compared with the case where a vinylidene chloride copolymer is mixed in a cement composition together with a hydraulic cement or an aggregate. The absolute dry density is 10
It is the specific gravity measured in a state of being sufficiently dried at 0 to 120 ° C.
【０００８】本発明は、上記塩化ビニリデン共重合体を
添加した混練物を押出機を用い押出成形し、セメント成
形品が得られる。このセメント成形品を、オートクレー
ブ等を用い養生するとセメント板が得られる。上記押出
成形、及び養生の条件は、特に、限定されず、公知の各
種条件で行えばよい。In the present invention, a cement molded product is obtained by extrusion-molding a kneaded product to which the above vinylidene chloride copolymer is added using an extruder. When this cement molded product is aged using an autoclave or the like, a cement board is obtained. The conditions for the extrusion molding and curing are not particularly limited, and various known conditions may be used.
【０００９】[0009]
【作用】本発明のセメント板の製造方法は、水硬性セメ
ント、及び骨材を主成分とするセメント組成物混合した
後に、水と塩化ビニリデン共重合体を添加し混練するの
で、塩化ビニリデン共重合体の混練される時間が少なく
てすみ、塩化ビニリデン共重合体の粒子が破壊されるこ
とを防ぐことができる。その結果、従来に比較して、同
量でより絶乾比重の小さいセメント板が作製できる。In the method for producing a cement board of the present invention, after the hydraulic cement and the cement composition containing the aggregate as the main component are mixed, water and a vinylidene chloride copolymer are added and kneaded. The time for kneading the coalescence is short, and it is possible to prevent the particles of the vinylidene chloride copolymer from being destroyed. As a result, it is possible to manufacture a cement board having the same amount and a smaller absolute dry specific gravity than the conventional one.
【００１０】[0010]
実施例１ 水硬性セメントを４７重量部（以下部と記す）、骨材と
して珪石粉を４７部、補強繊維としてパルプを５部、増
粘剤としてメチルセルロースを１部の割合で配合したセ
メント組成物をアイリッヒミキサーで混合した。その
後、上記セメント組成物１００部に対し、水４０部、塩
化ビニリデン共重合体として、塩化ビニリデンとアクリ
ロニトリルの共重合体を０．５部の割合で配合し混練機
で３分間混練して混練物を得た。上記混練物を幅４５５
ｍｍ、間隔１８ｍｍの金型を採用して、押出成形した。
得られたセメント成形品をオートクレーブを用い養生
し、硬化させ、セメント板を得た。Example 1 Cement composition containing 47 parts by weight of hydraulic cement (hereinafter referred to as "part"), 47 parts of silica stone powder as an aggregate, 5 parts of pulp as reinforcing fiber, and 1 part of methyl cellulose as a thickener. Were mixed in an Erich mixer. Then, with respect to 100 parts of the above cement composition, 40 parts of water, as a vinylidene chloride copolymer, a vinylidene chloride / acrylonitrile copolymer is blended at a ratio of 0.5 part and kneaded in a kneader for 3 minutes to obtain a kneaded product Got Width of the above kneaded product is 455
Extrusion molding was performed by using a mold having a size of 18 mm and a space of 18 mm.
The obtained cement molded product was cured using an autoclave and cured to obtain a cement board.
【００１１】比較例１ 水硬性セメントを４７部、骨材として珪石粉を４７部、
補強繊維としてパルプを５部、増粘剤としてメチルセル
ロースを１部、塩化ビニリデン共重合体として、塩化ビ
ニリデンとアクリロニトリルの共重合体を０．５部の割
合で配合したセメント組成物をアイリッヒミキサーで混
合した。その後、上記セメント組成物１００部に対し、
水を４０部の割合で配合し混練機で３分間混練して混練
物を得た。実施例１と同様にして、押出成形、及び養生
を行いセメント板を得た。Comparative Example 1 47 parts of hydraulic cement, 47 parts of silica stone powder as aggregate,
5 parts of pulp as reinforcing fiber, 1 part of methyl cellulose as a thickener, 0.5 part of vinylidene chloride copolymer and 0.5 part of vinylidene chloride copolymer as a cement composition were mixed with an Erich mixer. Mixed. Then, with respect to 100 parts of the cement composition,
40 parts of water was blended and kneaded with a kneader for 3 minutes to obtain a kneaded product. Extrusion molding and curing were carried out in the same manner as in Example 1 to obtain a cement board.
【００１２】得られたセメント板の絶乾比重を評価し
た。絶乾比重は１１０℃で２４時間乾燥した後の比重を
測定した。また、セメント板の強度の確認として、曲げ
強度を測定した。上記曲げ強度は、幅４０ｍｍ、スパン
距離１００ｍｍ、速度２ｍｍ／分、３点指示の条件で測
定した。The absolute dry specific gravity of the obtained cement board was evaluated. Absolute dry specific gravity was measured after drying at 110 ° C. for 24 hours. The bending strength was measured to confirm the strength of the cement board. The bending strength was measured under the conditions of a width of 40 mm, a span distance of 100 mm, a speed of 2 mm / min, and 3 points.
【００１３】結果は絶乾比重が実施例１は１．１、比較
例１は１．３であり、実施例１の絶乾比重が小さかっ
た。また、曲げ強度は実施例１、比較例１とも８０ｋｇ
ｆ／ｃｍ2 であり、セメント板としては良好であること
が確認された。As a result, the absolute dry specific gravity was 1.1 in Example 1 and 1.3 in Comparative Example 1, and the absolute dry specific gravity of Example 1 was low. The bending strength is 80 kg in both Example 1 and Comparative Example 1.
It was f / cm 2 , and it was confirmed that the cement board was good.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【発明の効果】本発明のセメント板の製造方法において
は、水硬性セメント、及び骨材を主成分とするセメント
組成物混合した後に、水と塩化ビニリデンの共重合体を
添加し混練するので、塩化ビニリデンの共重合体の粒子
を破壊することが防げるため、より絶乾比重の小さいセ
メント板を得ることができる。特に、瓦等の屋根材のセ
メント板の製造に最適である。In the method for producing a cement board of the present invention, since hydraulic cement and a cement composition containing an aggregate as a main component are mixed, a copolymer of water and vinylidene chloride is added and kneaded. Since it is possible to prevent the particles of the vinylidene chloride copolymer from being broken, it is possible to obtain a cement board having a smaller absolute dry specific gravity. In particular, it is most suitable for manufacturing cement boards for roofing materials such as roof tiles.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 24:38 Ｄ 16:04 24:26 Ａ ） Ｄ 111:40 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C04B 24:38 D 16:04 24:26 A) D 111: 40
Claims (2)
るセメント組成物を混合した後に、水、及び、塩化ビニ
リデンの共重合体を添加した混練物を押出成形し、養生
することを特徴とするセメント板の製造方法。1. A method in which a hydraulic cement and a cement composition containing an aggregate as a main component are mixed, and then a kneaded product to which water and a vinylidene chloride copolymer are added is extrusion-molded and cured. A method for manufacturing a cement board.
セメント組成物１００重量部に対し、０．１〜１重量部
の割合で添加することを特徴とする請求項１記載のセメ
ント板の製造方法。2. The production of a cement board according to claim 1, wherein the vinylidene chloride copolymer is added in an amount of 0.1 to 1 part by weight relative to 100 parts by weight of the cement composition. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5706094A JPH07267710A (en) | 1994-03-28 | 1994-03-28 | Production of cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5706094A JPH07267710A (en) | 1994-03-28 | 1994-03-28 | Production of cement plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07267710A true JPH07267710A (en) | 1995-10-17 |
Family
ID=13044908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5706094A Withdrawn JPH07267710A (en) | 1994-03-28 | 1994-03-28 | Production of cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07267710A (en) |
-
1994
- 1994-03-28 JP JP5706094A patent/JPH07267710A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010605 |