JPH0248480A - Curing of fiber cement plate - Google Patents
Curing of fiber cement plateInfo
- Publication number
- JPH0248480A JPH0248480A JP19925588A JP19925588A JPH0248480A JP H0248480 A JPH0248480 A JP H0248480A JP 19925588 A JP19925588 A JP 19925588A JP 19925588 A JP19925588 A JP 19925588A JP H0248480 A JPH0248480 A JP H0248480A
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- curing
- molded articles
- water
- reinforcing
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 239000004568 cement Substances 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 230000002950 deficient Effects 0.000 abstract description 2
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 238000001035 drying Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- 239000012209 synthetic fiber Substances 0.000 description 3
- 229920002994 synthetic fiber Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野〕
この発明は繊維セメント板の養生方法に関し、詳しくは
パルプ繊維または合成繊維等の有機質繊維を補強繊維と
する繊維セメント板の養生方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for curing fiber cement boards, and more particularly to a method for curing fiber cement boards using organic fibers such as pulp fibers or synthetic fibers as reinforcing fibers.
従来セメント製品の補強繊維として石綿繊維が有用であ
ることが周知であるが、粉塵公害の原因物質となること
、及び資源枯渇の両面より使用の廃止が余儀なくされ、
石綿代替繊維が種々模索されている現状である。It is well known that asbestos fiber is useful as a reinforcing fiber for conventional cement products, but its use has been forced to be discontinued due to both the fact that it causes dust pollution and the depletion of resources.
At present, various alternative fibers to asbestos are being explored.
この石綿代替繊維としてパルプ繊維あるいはポリプロピ
レン繊維等の有機繊維の使用が提案され、広〈実施され
ている。The use of organic fibers such as pulp fibers or polypropylene fibers as substitute fibers for asbestos has been proposed and widely implemented.
ところで、上記を機繊維の内バルブ繊維は、セメントと
の付着が悪く、また、セメント粒子に比べて乾燥しやす
いので、セメントマトリックスとの付着性がさらに悪化
する欠点が有った。By the way, the inner valve fibers of the above-mentioned machine fibers have poor adhesion to cement and are also easier to dry than cement particles, so they have the disadvantage of further deteriorating their adhesion to the cement matrix.
また、乾燥による収縮も生じるのでこれらに起因してオ
ートフレイブ養生した場合、製品にクラックが入りやす
く、不良品発生率が高い欠点が有った。In addition, shrinkage occurs due to drying, and due to these factors, when autoflave curing is performed, products tend to crack, resulting in a high rate of defective products.
また、ポリプロピレン繊維等有機合成繊維の場合は表面
が平滑であるためセメントマトリックスとの密着性が悪
く、充分な補強効果が得られないといった欠点が有る他
高温高圧養生を行うと養生時の熱により繊維が劣化ある
いは溶融するため補強効果が消失することもある欠点が
あった。In addition, in the case of organic synthetic fibers such as polypropylene fibers, the surface is smooth, so they have poor adhesion to the cement matrix, making it difficult to obtain sufficient reinforcing effects. There was a drawback that the reinforcing effect could be lost due to the fibers deteriorating or melting.
この発明は上記欠点に迄み、有機繊維を用いたセメント
製品の養生工程において上記有機繊維により生じる欠点
をすべて解消し、不良発生率を著しく低減化することの
できる繊維セメント板の養生方法を得ることを目的とし
てなされたものである。This invention provides a method for curing fiber cement boards that eliminates all the drawbacks caused by organic fibers in the curing process of cement products using organic fibers, and can significantly reduce the incidence of defects. It was done for that purpose.
即ち、この発明の繊維セメント板の養生方法は補強繊維
として有機繊維を配合したセメント配合物より賦形体を
成形し、該賦形体を水中分散しない程度に一旦硬化させ
た後、水中浸漬し、そのままの状態で高温高圧養生を行
なうことを特徴とするものである。That is, the method for curing fiber cement boards of the present invention involves forming a molded body from a cement mixture containing organic fibers as reinforcing fibers, hardening the molded body once to such an extent that it will not be dispersed in water, and then immersing it in water. It is characterized by performing high temperature and high pressure curing under the following conditions.
既述のように、パルプ繊維は乾燥しやすく、この乾燥に
よって種々の問題が生じる。As mentioned above, pulp fibers are prone to drying, and this drying causes various problems.
そこで、パルプ繊維の乾燥を防止すべく養生を水中養生
とし、バルブ繊維に必要な水分を補給し、そのとき、合
わせてセメントマトリックスの結合強度を増すべく、水
中浸漬の状態で高温高圧養生養生を行なうのである。Therefore, in order to prevent the pulp fibers from drying out, the pulp fibers are cured in water to supply the necessary moisture to the valve fibers, and at the same time, in order to increase the bonding strength of the cement matrix, high temperature and high pressure curing is carried out while immersed in water. I will do it.
従って、パルプの乾燥は完全に防げると同時に高温高圧
による結合強度の向上が図れ、板材の全体としての曲げ
強度、たわみ性の改良が図られるのである。Therefore, drying of the pulp can be completely prevented, and at the same time, the bonding strength due to high temperature and pressure can be improved, and the bending strength and flexibility of the plate material as a whole can be improved.
また、高温高圧養生されるセメント板は氷中浸１点され
た状態であるから温度は高々１００℃を限度とするため
有機合成繊維の劣化溶融も充分に防ＩＫできる。Furthermore, since the cement board that is cured at high temperature and high pressure is immersed in ice at one point, the temperature is limited to 100° C. at most, so that deterioration and melting of organic synthetic fibers can be sufficiently prevented from IK.
次に、この発明の詳細な説明する。 Next, the present invention will be explained in detail.
（実施例１）
表１に示すセメント配合原料により、乾式法にて厚さ５
ＩＩｌｌＩ＋の板材を成形し、１日放置して、板材の分
散化を防止した後、板材を２日間水中に浸漬し、その浸
漬状態のままバルブ繊維の場合は８．５ａｔｍＸ１０時
間の条件、ポリプロピレン繊維の場合は５ａｔｍ Ｘ１
０時間の条件でオートクレーブ条件を行なった。(Example 1) Using the cement mixture raw materials shown in Table 1, a thickness of 5 cm was obtained by dry method.
After molding the plate material of IIllI+ and leaving it for one day to prevent the plate material from dispersing, the plate material was immersed in water for two days, and in the case of valve fiber, the conditions were 8.5 atm x 10 hours, and polypropylene fiber. In the case of 5 atm X1
Autoclave conditions were performed for 0 hours.
（実施例２）
シリカ分としてフライアファユを使用し表２に示すセメ
ント配合原料により湿式抄造法によって繊維セメント板
を製造し、該繊維セメント板を一旦水中浸漬可能な程度
まで硬化させた後、１日間水中に浸漬し、浸漬したまま
実施例２−１．２−２共に３．Ｏａｔｍ Ｘ １０ｈｒ
の条件でオートクレーブ養生を行った。(Example 2) A fiber cement board was manufactured by a wet papermaking method using fly afayu as the silica component and the cement mixture raw materials shown in Table 2. After the fiber cement board was once hardened to the extent that it could be immersed in water, it was cured for one day. 3. Immersed in water, and while immersed, both Example 2-1.2-2. Oatm X 10hr
Autoclave curing was performed under the following conditions.
（比較例）
実施例１ （１−１，１−２）、及び実施例２（２−
１，２−２）と全く同一の配合原料および量によりそれ
ぞれ乾式法、および湿式法により同一厚さの板状を成形
し、この成形体を一日間気中での一次養生後、水中浸漬
をすることなく上記各実施例と同様なオートクレーブ条
件で養生をおこなった。(Comparative example) Example 1 (1-1, 1-2) and Example 2 (2-
1, 2-2) Using exactly the same blended raw materials and amounts, a plate shape of the same thickness was formed by a dry method and a wet method, respectively, and after primary curing of this molded product in air for one day, it was immersed in water. The curing was carried out under the same autoclave conditions as in each of the above Examples.
オートクレーブ養生後の実施例１−１〜２と比較例１−
１〜２につきＪＩＳＡ号曲げテストを又、実施例２−１
〜２と比較例２−１〜２についてはＪＩＳ３号曲げテス
トをそれぞれ実施したところ表３の結果となった。Examples 1-1 to 2 and Comparative Example 1- after autoclave curing
1 to 2, the JISA bending test was also carried out in Example 2-1.
-2 and Comparative Examples 2-1 and 2-2 were subjected to a JIS No. 3 bending test, and the results shown in Table 3 were obtained.
Claims (1)
物より賦形体を成形し、該賦形体を水中分散しない程度
に一旦硬化させた後、水中浸漬し、そのままの状態で高
温高圧養生を行なうことを特徴とするパルプ繊維セメン
ト板の養生方法。(1) Molding a molded body from a cement mixture containing organic fibers as reinforcing fibers, once hardening the molded body to an extent that it will not be dispersed in water, immersing it in water, and curing at high temperature and high pressure in that state. A method for curing pulp fiber cement boards characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19925588A JPH0248480A (en) | 1988-08-09 | 1988-08-09 | Curing of fiber cement plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19925588A JPH0248480A (en) | 1988-08-09 | 1988-08-09 | Curing of fiber cement plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0248480A true JPH0248480A (en) | 1990-02-19 |
Family
ID=16404744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19925588A Pending JPH0248480A (en) | 1988-08-09 | 1988-08-09 | Curing of fiber cement plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0248480A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6061011A (en) * | 1997-09-09 | 2000-05-09 | Nisshinbo Industries, Inc. | Nonflammable radio wave absorber |
-
1988
- 1988-08-09 JP JP19925588A patent/JPH0248480A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6061011A (en) * | 1997-09-09 | 2000-05-09 | Nisshinbo Industries, Inc. | Nonflammable radio wave absorber |
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