JPH07237948A - Cement composition - Google Patents
Cement compositionInfo
- Publication number
- JPH07237948A JPH07237948A JP2764394A JP2764394A JPH07237948A JP H07237948 A JPH07237948 A JP H07237948A JP 2764394 A JP2764394 A JP 2764394A JP 2764394 A JP2764394 A JP 2764394A JP H07237948 A JPH07237948 A JP H07237948A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- cement composition
- weight
- inorganic filler
- 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- Withdrawn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
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメント組成物に関
し、具体的にはセルロース繊維を構成材料としたセメン
ト組成物に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement composition, and more specifically to a cement composition containing cellulose fibers as a constituent material.
【０００２】[0002]
【従来の技術】セメント組成物は、セメント、骨材、増
粘剤、補強繊維等を配合して作製される。このセメント
組成物に水を添加した混練物を押出成形し、この成形し
たセメント成形品を養生してセメント板を得る。従来、
このセメント組成物に用いる補強繊維としてアスベスト
が使用されれいるが、粉塵公害防止の見地よりアスベス
トの使用の縮小、ないし全廃が要望されている。このた
め、アスベストに代わる補強繊維としてセルロース繊維
を用いたセメント組成物が提案されている。しかし、セ
ルロース繊維を含有したセメント組成物は、セルロース
繊維がセメント成形品の硬化を阻害するために、養生に
長時間を要する問題があった。2. Description of the Related Art A cement composition is prepared by mixing cement, aggregate, thickener, reinforcing fiber and the like. A kneaded product obtained by adding water to this cement composition is extrusion-molded, and the molded cement-molded product is cured to obtain a cement board. Conventionally,
Asbestos is used as a reinforcing fiber used in this cement composition, but from the viewpoint of preventing dust pollution, there is a demand for reduction of the use of asbestos or complete abolition. For this reason, cement compositions using cellulose fibers as reinforcing fibers in place of asbestos have been proposed. However, the cement composition containing the cellulose fiber has a problem that it takes a long time for curing because the cellulose fiber inhibits the hardening of the cement molded product.
【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、水硬
性セメント、骨材、セルロース繊維を主成分とするセメ
ント組成物であって、養生時間を短縮できるセメント組
成物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 cement composition containing hydraulic cement, aggregate and cellulose fiber as a main component. Another object of the present invention is to provide a cement composition which can shorten the curing time.
【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
セメント組成物は、水硬性セメント、骨材、セルロース
繊維を主成分とするセメント組成物であって、上記組成
物が比表面積２０ｍ2／ｇ以上の無機充填剤を含有した
ことを特徴とする。The cement composition according to claim 1 of the present invention is a cement composition containing hydraulic cement, aggregate and cellulose fiber as main components, and the composition has a specific surface area of 20 m. It is characterized by containing 2 / g or more of an inorganic filler.
【０００５】本発明の請求項２に係るセメント組成物
は、請求項１記載のセメント組成物において、無機充填
剤が、カーボンブラック、乾式シリカ、ゼオライト、炭
酸カルシウムのうち少なくとも１種であることを特徴と
する。According to a second aspect of the present invention, in the cement composition according to the first aspect, the inorganic filler is at least one of carbon black, dry silica, zeolite and calcium carbonate. Characterize.
【０００６】本発明の請求項３に係るセメント組成物
は、請求項１又は請求項２記載のセメント組成物におい
て、無機充填剤が、セメント組成物の全量に対して１〜
２０重量％の範囲で含有していることを特徴とする。[0006] The cement composition according to claim 3 of the present invention is the cement composition according to claim 1 or 2, wherein the inorganic filler is 1 to the total amount of the cement composition.
It is characterized in that it is contained in a range of 20% by weight.
【０００７】以下、本発明を詳細に説明する。本発明の
セメント組成物は、水硬性セメント、骨材、セルロース
繊維を主成分とする。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。上記セルロース繊維としては、広
葉樹、針葉樹のパルプ繊維が挙げられる。上記セメント
組成物には、必要に応じて、増粘剤、軽量化剤を添加す
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。上記軽量化剤は、作製するセメント板の軽
量化を目的として添加するもので、例えば、パーライ
ト、シラスバルーン等が挙げられる。The present invention will be described in detail below. The cement composition of the present invention contains hydraulic cement, aggregate and cellulose fiber as main components. 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. Examples of the cellulose fibers include hardwood and softwood pulp fibers. A thickener and a lightening agent are added to the cement composition as needed. Examples of the thickener include methyl cellulose. The above-mentioned weight-reducing agent is added for the purpose of reducing the weight of the cement board to be produced, and examples thereof include pearlite and shirasu balloon.
【０００８】本発明のセメント組成物は、比表面積２０
ｍ2 ／ｇ以上の無機充填剤を含有する。上記無機充填剤
としては、例えば、カーボンブラック、乾式シリカ、ゼ
オライト、炭酸カルシウムが挙げられ、これら無機充填
剤が少なくとも１種以上用いられる。上記比表面積２０
ｍ2 ／ｇ以上の無機充填剤を含有すると、後工程のセメ
ント成形品を養生し硬化させる工程で、硬化が早く進行
し養生時間が短縮できる。上記無機充填剤の比表面積は
２０ｍ2 ／ｇ以上であり、特に５０〜１３０ｍ 2 ／ｇの
範囲が好ましい。さらに、上記無機充填剤の含有量は限
定はしないが、少量であると後工程のセメント成形品の
硬化時間の短縮する効果が期待できないし、多量である
と曲げ強度が低下するので、セメント組成物全量に対し
１〜２０重量％の範囲が適する。The cement composition of the present invention has a specific surface area of 20.
m2/ G or more of inorganic filler is contained. Above inorganic filler
For example, carbon black, fumed silica,
Olite and calcium carbonate are included, and these inorganic fillers are used.
At least one agent is used. The specific surface area 20
m2/ G or more inorganic filler is contained, the sem
In the process of curing and curing the molded parts, the curing progresses quickly.
The curing time can be shortened. The specific surface area of the inorganic filler is
20m2/ G or more, especially 50 to 130 m 2/ G
Ranges are preferred. Furthermore, the content of the inorganic filler is limited.
Although it is not specified, if it is a small amount, it will be
The effect of shortening the curing time cannot be expected, and there is a large amount.
And bending strength will decrease, so the total amount of cement composition
A range of 1 to 20% by weight is suitable.
【０００９】その後、上記セメント組成物に水を添加し
た混練物を押出成形し、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。Then, a kneaded product obtained by adding water to the cement composition is extruded to obtain a cement molded product. When this cement molded product is aged using an autoclave or the like, a cement board is obtained. The curing condition is not particularly limited, and various known conditions may be used.
【００１０】[0010]
実施例１ 水硬性セメントを４７重量％、骨材として珪石粉を４６
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％、無機充填剤として比表面積が１００ｍ
2 ／ｇのカーボンブラックを１重量％の割合で配合しセ
メント組成物を得た。Example 1 47% by weight of hydraulic cement and 46% of silica stone powder as aggregate
% By weight, 5% by weight of pulp, 1% by weight of methylcellulose as a thickening agent, 100 m of specific surface area as an inorganic filler.
A cement composition was obtained by mixing 2 / g of carbon black at a ratio of 1% by weight.
【００１１】次に、このセメント組成物１００重量部に
対し、水を４０重量部の割合で配合し、アイリッヒミキ
サーで混合、ニーダで混練した後に、押出成形し、セメ
ント成形品を得た。Next, 100 parts by weight of this cement composition was mixed with 40 parts by weight of water, mixed with an Erich mixer, kneaded with a kneader, and then extrusion molded to obtain a cement molded product.
【００１２】実施例２ 水硬性セメントを４７重量％、骨材として珪石粉を４６
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％、無機充填剤として比表面積が１３０ｍ
2 ／ｇの乾式シリカ（日本アエロジル株式会社製：商品
名アエロジル）を１重量％の割合で配合しセメント組成
物を得た。その後、実施例１と同様にしてセメント成形
品を得た。Example 2 47% by weight of hydraulic cement and 46% silica stone powder as aggregate
% By weight, 5% by weight of pulp, 1% by weight of methylcellulose as a thickening agent, and a specific surface area of 130 m as an inorganic filler.
A cement composition was obtained by mixing 2 / g of dry silica (manufactured by Nippon Aerosil Co., Ltd .: trade name Aerosil) at a ratio of 1% by weight. Then, a cement molded product was obtained in the same manner as in Example 1.
【００１３】実施例３ 水硬性セメントを４７重量％、骨材として珪石粉を３２
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％、無機充填剤として比表面積が５０ｍ2
／ｇのゼオライトを１５重量％の割合で配合しセメント
組成物を得た。その後、実施例１と同様にしてセメント
成形品を得た。EXAMPLE 3 47% by weight of hydraulic cement and 32 of silica stone powder as aggregate
% By weight, 5% by weight of pulp, 1% by weight of methylcellulose as a thickening agent, and a specific surface area of 50 m 2 as an inorganic filler.
A cement composition was obtained by blending zeolite / g in a proportion of 15% by weight. Then, a cement molded product was obtained in the same manner as in Example 1.
【００１４】実施例４ 水硬性セメントを４７重量％、骨材として珪石粉を３２
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％、無機充填剤として比表面積が５０ｍ2
／ｇの炭酸カルシウムを１５重量％の割合で配合しセメ
ント組成物を得た。その後、実施例１と同様にしてセメ
ント成形品を得た。Example 4 47% by weight of hydraulic cement and 32 of silica stone powder as aggregate
% By weight, 5% by weight of pulp, 1% by weight of methylcellulose as a thickening agent, and a specific surface area of 50 m 2 as an inorganic filler.
A cement composition was obtained by blending 15% by weight of calcium carbonate / g. Then, a cement molded product was obtained in the same manner as in Example 1.
【００１５】比較例１ 水硬性セメントを４７重量％、骨材として珪石粉を４７
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％の割合で配合しセメント組成物を得た。
その後、実施例１と同様にしてセメント成形品を得た。Comparative Example 1 47% by weight of hydraulic cement and 47% of silica stone powder as an aggregate.
% By weight, pulp by 5% by weight, and methylcellulose as a thickening agent at a ratio of 1% by weight to obtain a cement composition.
Then, a cement molded product was obtained in the same manner as in Example 1.
【００１６】比較例２ 水硬性セメントを４７重量％、骨材として珪石粉を３２
重量％、パルプを５重量％、増粘剤としてメチルセルロ
ースを１重量％、無機充填剤として比表面積が１０ｍ2
／ｇの炭酸カルシウムを１５重量％の割合で配合しセメ
ント組成物を得た。その後、実施例１と同様にしてセメ
ント成形品を得た。Comparative Example 2 47% by weight of hydraulic cement and 32 g of silica stone powder as aggregate
% By weight, 5% by weight of pulp, 1% by weight of methylcellulose as a thickening agent, and a specific surface area of 10 m 2 as an inorganic filler.
A cement composition was obtained by blending 15% by weight of calcium carbonate / g. Then, a cement molded product was obtained in the same manner as in Example 1.
【００１７】得られた実施例１〜４、及び比較例１〜２
のセメント成形品の硬化度を評価した。該セメント成形
品２００ｇをポリプロの袋に密封して、４０℃の恒温槽
に保管した。１２時間後に取り出し、アスカー硬度計で
硬度を測定した。結果は表１に示すとおり、実施例のセ
メント成形品は硬化度が４５〜５２であり、比較例に比
べいずれも硬化が進行していた。The obtained Examples 1 to 4 and Comparative Examples 1 to 2
The degree of hardening of the cement molded product was evaluated. 200 g of the cement molded product was sealed in a polypro bag and stored in a constant temperature bath at 40 ° C. It was taken out after 12 hours, and the hardness was measured with an Asker hardness meter. As shown in Table 1, the cement molded articles of the examples had a curing degree of 45 to 52, and the curing progressed in all cases as compared with the comparative examples.
【００１８】さらに、実施例１と比較例１のセメント成
形品を用い、上述の方法で硬度の経時変化を測定した。
結果は図１に示す如く、実施例１が硬化の進行が早いこ
とが確認できた。Further, the cement molded articles of Example 1 and Comparative Example 1 were used to measure the change with time in hardness by the method described above.
As a result, as shown in FIG. 1, it was confirmed that the progress of curing was fast in Example 1.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】本発明の請求項１乃至３記載のセメント
組成物においては、比表面積２０ｍ2／ｇ以上の無機充
填剤を含有しているので、セルロース繊維を含有してい
ても、セメント成形品が養生する際に、硬化を阻害する
ことなく、養生時間を短縮することができる。さらに、
アスベストを配合していないので、アスベストによる粉
塵公害を防止できる。The cement composition according to claims 1 to 3 of the present invention contains an inorganic filler having a specific surface area of 20 m 2 / g or more. When the product is cured, the curing time can be shortened without inhibiting the curing. further,
Since it does not contain asbestos, dust pollution due to asbestos can be prevented.
【図１】硬化の経時変化を測定した結果を示す。FIG. 1 shows the results of measuring the change with time of curing.
なし None
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 14:06 Ｚ 24:38） Ａ Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display area C04B 14:06 Z 24:38) A
Claims (3)
を主成分とするセメント組成物であって、上記組成物が
比表面積２０ｍ2 ／ｇ以上の無機充填剤を含有したこと
を特徴とするセメント組成物。1. A cement composition comprising a hydraulic cement, an aggregate and a cellulose fiber as a main component, wherein the composition contains an inorganic filler having a specific surface area of 20 m 2 / g or more. Composition.
乾式シリカ、ゼオライト、炭酸カルシウムのうち少なく
とも１種であることを特徴とする請求項１記載のセメン
ト組成物。2. The inorganic filler is carbon black,
The cement composition according to claim 1, which is at least one of dry silica, zeolite, and calcium carbonate.
量に対して１〜２０重量％の範囲で含有していることを
特徴とする請求項１又は請求項２記載のセメント組成
物。3. The cement composition according to claim 1 or 2, wherein the inorganic filler is contained in the range of 1 to 20% by weight based on the total amount of the cement composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2764394A JPH07237948A (en) | 1994-02-25 | 1994-02-25 | Cement composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2764394A JPH07237948A (en) | 1994-02-25 | 1994-02-25 | Cement composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07237948A true JPH07237948A (en) | 1995-09-12 |
Family
ID=12226621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2764394A Withdrawn JPH07237948A (en) | 1994-02-25 | 1994-02-25 | Cement composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07237948A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020034585A (en) * | 2000-11-02 | 2002-05-09 | 한종희 | a cement additive composition and a preparing method thereof |
| KR20060130413A (en) * | 2005-06-14 | 2006-12-19 | 주식회사 엔시플러스 | A coating composition having a function of flame-resistant and noise-absorbing |
| WO2023080122A1 (en) * | 2021-11-02 | 2023-05-11 | 株式会社クラレ | Porous molded plate |
-
1994
- 1994-02-25 JP JP2764394A patent/JPH07237948A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020034585A (en) * | 2000-11-02 | 2002-05-09 | 한종희 | a cement additive composition and a preparing method thereof |
| KR20060130413A (en) * | 2005-06-14 | 2006-12-19 | 주식회사 엔시플러스 | A coating composition having a function of flame-resistant and noise-absorbing |
| WO2023080122A1 (en) * | 2021-11-02 | 2023-05-11 | 株式会社クラレ | Porous molded plate |
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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: 20010508 |