JPH0214887A - Production of lightweight foamed cement board - Google Patents
Production of lightweight foamed cement boardInfo
- Publication number
- JPH0214887A JPH0214887A JP16449988A JP16449988A JPH0214887A JP H0214887 A JPH0214887 A JP H0214887A JP 16449988 A JP16449988 A JP 16449988A JP 16449988 A JP16449988 A JP 16449988A JP H0214887 A JPH0214887 A JP H0214887A
- Authority
- JP
- Japan
- Prior art keywords
- cement paste
- cement
- foamed cement
- acrylic emulsion
- alkali
- 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.)
- Pending
Links
- 239000004568 cement Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 12
- 230000001413 cellular effect Effects 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 abstract description 5
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- 239000004088 foaming agent Substances 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000011398 Portland cement Substances 0.000 description 6
- 238000005187 foaming Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 239000000377 silicon dioxide Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 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
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、軽量気泡セメント板の製造方法に関するも
のである。さらに詳しくは、この発明は、セメントペー
ストの成型可能時間を短縮し、生産性を向上させること
のできる軽量気泡セメント板の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing lightweight cellular cement boards. More specifically, the present invention relates to a method of manufacturing a lightweight cellular cement board that can shorten the molding time of cement paste and improve productivity.
（従来の技術）
従来より軽輩気泡セメント板は内外装材として広く用い
られており、これらのコンクリートはセメントスラリー
に気泡を導入し、養生、成型することにより製造されて
いる。(Prior Art) Light-weight cellular cement boards have been widely used as interior and exterior materials, and these concretes are manufactured by introducing air bubbles into cement slurry, curing, and forming the concrete.
この従来の製造法においては、セメントペーストに気泡
を導入する方法として、プレフォーム法、起泡剤を混和
して泡立てる方法、発泡剤を用いて化学反応により発生
させたガスを利用する方法などが知られている。しかし
、いずれの方法においても、−ＪＲに、気泡を分散した
未硬化のセメントペーストは強度が小さく、賦形や成型
が困難である。そのため、従来より、セメントペースト
の初期強度を上げて生産性の向上を図るべく、硬化促進
剤、補強剤などの添加剤が用いられていた。In this conventional manufacturing method, methods for introducing air bubbles into cement paste include the preform method, the method of mixing a foaming agent and foaming, and the method of using gas generated by a chemical reaction using a foaming agent. Are known. However, in either method, the uncured cement paste containing air bubbles dispersed in -JR has low strength and is difficult to shape and mold. Therefore, additives such as hardening accelerators and reinforcing agents have conventionally been used to increase the initial strength of cement paste and improve productivity.
（発明が解決しようとする課題）
このように気泡を分散した未硬化のセメントペーストに
硬化促進剤等を添加する場合にはその硬化を速めること
ができるが、気泡を導入後、その強度が賦形、成型可能
となるまでにはなお相当の時間を必要とし、結局は生産
性の向上を十分に高めることができないのが実状であっ
た。(Problem to be Solved by the Invention) When adding a hardening accelerator or the like to an unhardened cement paste with air bubbles dispersed in this way, it is possible to speed up the hardening, but after introducing the air bubbles, the strength of the cement paste increases. The reality is that a considerable amount of time is still required before it can be shaped and molded, and in the end, productivity cannot be improved sufficiently.
この発明は、このような事・ｈ’ｌに鑑みてなされたも
のであり、従来の方法の欠点を改善し、セメントペース
トに気泡を導入後、短時間で賦形、成型可能な強度とす
ることができ、生産性の向上を可能とする改良された軽
量気泡セメント板の製造方法を提供することを目的とし
ている。This invention was made in view of the above-mentioned problems, and it improves the drawbacks of the conventional method and makes it strong enough to be shaped and molded in a short time after introducing air bubbles into the cement paste. The purpose of the present invention is to provide an improved method for manufacturing lightweight cellular cement boards that enables improved productivity.
（課題を解決するための手段）
この発明は、上記の課題を解決するために、気泡を含有
するセメントペーストにアルカリ硬化型アクリルエマル
ジョンを配合して養生し、成型可能とすることを特徴と
する軽量気泡セメント板の製造方法を提供する。(Means for Solving the Problems) In order to solve the above problems, the present invention is characterized by blending an alkali-curing acrylic emulsion into a cement paste containing air bubbles and curing it to make it moldable. A method for manufacturing a lightweight cellular cement board is provided.
この発明の方法においては、セメントペーストに配合す
るセメント材として、従来より軽及気泡セメント板の製
造に一般に用いられてきたものを広く使用することがで
きる。たとえば、普通ポルトランドセメント、早強ポル
トランドセメント、中庸ポルトランドセメントなどの単
味ポルトランドセメント、混合ポルトランドセメント、
アルミナセメントなどの特殊セメント等を用いることが
できる。In the method of the present invention, a wide range of cement materials that have been conventionally used in the production of light-celled cement boards can be used as the cement material to be mixed into the cement paste. For example, plain portland cement such as ordinary portland cement, early strength portland cement, medium portland cement, mixed portland cement,
Special cement such as alumina cement can be used.
また、このセメント材には、必要に応じて、ケイ砂、ケ
イ石粉、フライアッシュ、シリカフラワー、炭酸カルシ
ウム等の骨材、メチルセルロース等の増粘剤、ビニロン
、ポリプロピレン等の繊維、酢酸ビニルベオバ共重合体
等の粉末補強材、ポリアルキルアリルスルホン酸塩等の
減水剤などの適宜な添加剤を混合、混練することができ
る。In addition, this cement material may contain aggregates such as silica sand, silica powder, fly ash, silica flour, and calcium carbonate, thickeners such as methyl cellulose, fibers such as vinylon and polypropylene, and vinyl acetate beova copolymer. Appropriate additives such as a powder reinforcing material such as a coalescent, a water reducing agent such as a polyalkylaryl sulfonate, and the like can be mixed and kneaded.
セメントペーストに気泡を導入する方法にも特に制限は
なく、プレフォーム法や、ポストフオーム法、起泡剤の
混和あるいは発泡剤による化学反応などによりミキサ中
で起泡させるミグスフオーム法などの従来公知のいずれ
の方法も使用することができる。一般に起泡剤の混和に
より起泡する場合には、起泡剤として蛋白質系起泡剤あ
るいはノニオン系または両性系の起泡性界面活性剤を使
用することか好ましい。これらの起泡剤の使用量は製造
する製品の比重に応じて適宜定めるが、通常はセメント
１００ 、ｆｉｎ部に対して約１０〜２０重量部使用す
る。There is no particular restriction on the method of introducing air bubbles into the cement paste, and conventionally known methods such as the pre-form method, the post-form method, and the Migs foam method in which foaming is carried out in a mixer by mixing a foaming agent or by chemical reaction with a foaming agent, etc. Either method can be used. Generally, when foaming is performed by mixing a foaming agent, it is preferable to use a protein-based foaming agent or a nonionic or amphoteric foaming surfactant as the foaming agent. The amount of these foaming agents to be used is appropriately determined depending on the specific gravity of the product to be manufactured, but is usually about 10 to 20 parts by weight per 100 parts of cement.
この発明の製造方法においては、気泡を含有するセメン
トペーストが成型可能となるまでの時間を短縮するため
に、アルカリ硬化型のアクリルエマルジョンを配合する
。このアルカリ硬化型のアクリルエマルジョンの添加の
段階に特に制限はなく、気泡含有前のセメントペースト
に配合してもよく、あるいはまた、気泡を含有するセメ
ントベース１〜に後添加してもよい。In the manufacturing method of the present invention, an alkali-curing acrylic emulsion is blended in order to shorten the time until the cement paste containing air bubbles can be molded. There is no particular restriction on the stage of addition of this alkali-curing acrylic emulsion, and it may be added to the cement paste before it contains air bubbles, or it may be added afterward to the cement base 1~ containing air bubbles.
また、その添加量は、アルカリ硬化型アクリルエマルジ
ョンの種類、濃度、必要とするセメントペーストの初期
強度に応じて適宜に定めることができる。Further, the amount added can be appropriately determined depending on the type and concentration of the alkali-curing acrylic emulsion and the required initial strength of the cement paste.
このアクリルエマルジョンを配合し、気泡を分散させた
セメントペーストは、養生した後に成型可能とすること
ができる−この養生の時間も適宜に定めることができる
ことはいうまでもない。A cement paste containing this acrylic emulsion and having air bubbles dispersed therein can be molded after curing - it goes without saying that the curing time can also be determined as appropriate.
（作 用）
以上のこの発明の製造方法により、気泡導入後のセメン
トペーストを賦形、成型可能な強度に硬化するまでの時
間を著しく短縮させることができる。(Function) According to the manufacturing method of the present invention described above, the time required for the cement paste after introducing air bubbles to harden to a strength that allows shaping and molding can be significantly shortened.
（実施例）
以下、実施例を示し、さらに詳しくこの発明の製造方法
を説明する。(Example) Hereinafter, an example will be shown and the manufacturing method of the present invention will be explained in more detail.
実施例１
普通ポルトランドセメント４５重量部、ゲイ石粉４５重
量部、フライアッシュ１０重量部、起泡剤１０重量部、
増粘剤０．５重量部、溌水剤０．５重量部、アルカリ硬
化型アクリルエマルジョン（ＡＦ９４３、カネボウ■製
）５重量部、および水３５重量部を混合し、セメントペ
ーストを調製した。Example 1 45 parts by weight of ordinary Portland cement, 45 parts by weight of gay stone powder, 10 parts by weight of fly ash, 10 parts by weight of foaming agent,
A cement paste was prepared by mixing 0.5 parts by weight of a thickener, 0.5 parts by weight of a water repellent, 5 parts by weight of an alkali-curing acrylic emulsion (AF943, manufactured by Kanebo ■), and 35 parts by weight of water.
このセメントペーストを発泡器を用いて泡立て、賦形し
た。This cement paste was foamed using a foamer and shaped.
その際の賦形４時間後の圧縮強度を測定したところ、表
１に示した通り０．１ｋｊＪｆ／−であった。When the compressive strength was measured after 4 hours of shaping, it was 0.1 kjJf/- as shown in Table 1.
後述のアクリルエマルジョンを配合しない比較例に比べ
てその強度ははるかに大きく、１０倍以上であった。The strength was much greater than that of a comparative example that did not contain the acrylic emulsion described below, and was more than 10 times as strong.
実施例２
アルカリ硬化型アクリルエマルジョンの配合量を８重量
部として実施例１と同様にセメントペーストを調製し、
発泡させ、賦形した。Example 2 A cement paste was prepared in the same manner as in Example 1 using 8 parts by weight of the alkali-curing acrylic emulsion,
It was foamed and shaped.
賦形４時間後の圧縮強度は、表１に示した通り、０．２
ｋｇｆ／ｉであった。The compressive strength after 4 hours of shaping was 0.2 as shown in Table 1.
kgf/i.
比敦例
アクリルエマルジョンを添加せずに実施例１と同様にセ
メントペーストの発泡および賦形を行った。賦形５時間
後の圧縮強度を測定したところ、５時間経過しても０．
０１ｋｇｆ ／ｃ１１！未満の強度しか得られなかった
。Specific Example A cement paste was foamed and shaped in the same manner as in Example 1 without adding the acrylic emulsion. When the compressive strength was measured after 5 hours of shaping, it was found to be 0.0% even after 5 hours.
01kgf/c11! Only less strength was obtained.
表
（発明の効果）
この発明により、軽量気泡セメント板を製造するに際し
、短時間でセメントペーストを賦形、成型可能な強度と
することができる。したがって、軽量気泡セメント板の
製造時における生産性を著しく向上させることができる
。Table (Effects of the Invention) According to the present invention, when manufacturing a lightweight cellular cement board, cement paste can be made strong enough to be shaped and molded in a short time. Therefore, productivity in manufacturing lightweight cellular cement boards can be significantly improved.
Claims (1)
型アクリルエマルジョンを配合して養生し、成型可能と
することを特徴とする軽量気泡セメント板の製造方法。(1) A method for producing a lightweight cellular cement board, which comprises blending an alkali-curing acrylic emulsion into a cement paste containing bubbles and curing it to make it moldable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16449988A JPH0214887A (en) | 1988-07-01 | 1988-07-01 | Production of lightweight foamed cement board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16449988A JPH0214887A (en) | 1988-07-01 | 1988-07-01 | Production of lightweight foamed cement board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0214887A true JPH0214887A (en) | 1990-01-18 |
Family
ID=15794320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16449988A Pending JPH0214887A (en) | 1988-07-01 | 1988-07-01 | Production of lightweight foamed cement board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0214887A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5315655A (en) * | 1992-12-16 | 1994-05-24 | Notable Technologies, Inc. | Method and apparatus for encoding data objects on a computer system |
-
1988
- 1988-07-01 JP JP16449988A patent/JPH0214887A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5315655A (en) * | 1992-12-16 | 1994-05-24 | Notable Technologies, Inc. | Method and apparatus for encoding data objects on a computer system |
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