JPH02196051A - Production of fiber-cement board - Google Patents
Production of fiber-cement boardInfo
- Publication number
- JPH02196051A JPH02196051A JP1377389A JP1377389A JPH02196051A JP H02196051 A JPH02196051 A JP H02196051A JP 1377389 A JP1377389 A JP 1377389A JP 1377389 A JP1377389 A JP 1377389A JP H02196051 A JPH02196051 A JP H02196051A
- Authority
- JP
- Japan
- Prior art keywords
- cement
- water
- reinforcing fibers
- silica
- asbestos
- 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 24
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 12
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000010425 asbestos Substances 0.000 claims abstract description 10
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 7
- 230000002542 deteriorative effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000012209 synthetic fiber Substances 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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
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)
- 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製造方法に関し、詳しくは
石綿以外の繊維を補強繊維とする繊維セメント板の製造
方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a fiber cement board, and more particularly to a method for manufacturing a fiber cement board using fibers other than asbestos 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無くされ
、石綿代替繊維が種々模索されている現状である。It has been well known that asbestos fiber is useful as a reinforcing fiber for cement products, but its use has been forced to be discontinued due to both the fact that it causes dust pollution and resource depletion, and various alternative fibers to asbestos are being explored. This is the current situation.
この石綿代替繊維としてポリプロピレン繊維等の有機合
成繊維又はガラス繊維等の使用が促案され、広〈実施さ
れている。The use of organic synthetic fibers such as polypropylene fibers or glass fibers as substitute fibers for asbestos has been proposed and widely implemented.
ところで、上記有機合成繊維はセメント製品の高温高圧
養生を行な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、補強効果が充分に17)られない問題が
有り、また、ガラス繊維の場合はアルカリによる侵蝕が
上記熱により促進され、やはり劣化が生じると言った問
題が有った。By the way, when the above-mentioned organic synthetic fibers are cured at high temperature and high pressure for cement products, the fibers deteriorate or melt due to the heat during curing, so there is a problem that the reinforcing effect is not sufficient17), and in the case of glass fibers, There was a problem in that the corrosion caused by the alkali was accelerated by the heat, resulting in deterioration.
(発明が解決しようとする課題〕
この発明は上記問題点に鑑み、石綿以外のどのようなi
mの補強繊維を用いても繊維等の劣化を生じることな(
、充分な強度を発渾し得る繊維セメント板の製造方法を
提供することを目的としてなされたものである。(Problem to be solved by the invention) In view of the above problems, this invention
Even if reinforcing fibers of m are used, there will be no deterioration of the fibers, etc. (
The purpose of this invention is to provide a method for manufacturing fiber cement boards that can develop sufficient strength.
(!It!題を解決するに至った技術)即ち、この発明
の繊維セメント板の製造方法はプレーン値6000〜8
000cm3/gのセメント35〜45重量%、プレー
ン値10000〜12000 cm3/gのシリカ30
〜40重量%より成るセメント、シリカ配合物に粗骨材
及び石綿以外の補強繊維を残部重量%添加して混合し、
加水の上置形体を成形し、該賦形体を自然養生し、次い
で、2週間以上水中養生を行なうことを特徴とするもの
である。(!It! The technology that led to solving the problem) That is, the method for manufacturing fiber cement board of this invention has a plain value of 6000 to 8.
000 cm3/g cement 35-45% by weight, plain value 10000-12000 cm3/g silica 30
Adding the remaining weight percent of coarse aggregate and reinforcing fibers other than asbestos to a cement and silica mixture consisting of ~40 weight percent, and mixing;
The method is characterized in that a water-added shaped body is molded, the shaped body is naturally cured, and then it is cured in water for two weeks or more.
〔作用]
この発明において、セメント及びシリカのプレーン値を
夫々限定するのは、両者の粒子を一定以上微小化させる
ことにより、比表面積を高め、反応性を高めて後述の水
中養生と合わせ高強度のセメントマトリックスを生成せ
しめるためであり、セメントについてはプレーン値60
00cm3/gより少ないと上述の効果が得られず、ま
た、8000d/、より大きいと、特に乾式製法の場合
、加水された水の浸透性が悪化し、圧縮ロールにセメン
ト粒が付着する現象が生じ賦形体を成形できないからで
ある。[Function] In this invention, the plain values of cement and silica are limited by making the particles of both particles smaller than a certain level, thereby increasing the specific surface area, increasing the reactivity, and achieving high strength when cured in water as described below. This is to generate a cement matrix of
If it is less than 00cm3/g, the above-mentioned effect cannot be obtained, and if it is larger than 8000d/g, the permeability of added water will deteriorate, especially in the case of dry manufacturing, and cement particles will adhere to the compression roll. This is because the resulting shaped body cannot be molded.
シリカについても同様で、上述の不都合の生じない範囲
としてプレーン値10000〜12000 dlgとさ
れる。The same applies to silica, and the plain value is set to 10,000 to 12,000 dlg as a range in which the above-mentioned disadvantages do not occur.
これらセメント、シリカ配合に対し添加される補強繊維
としては石綿以外の繊維であれば何でも良いが、好適例
としては、ポリプロピレン、ポリエチレン、ガラス繊維
などが用いられる。Any reinforcing fibers other than asbestos may be used as the reinforcing fibers added to these cement and silica formulations, but preferred examples include polypropylene, polyethylene, and glass fibers.
この発明において、セメント製品の養生手段として、水
中養生を用いるのは、オートクレーブによる高熱を避け
るためであり、前述のセメント及びシリカのプレーン値
の限定によるセメントマトリックスの結合強度の強化と
相俟ってオートクレーブ養生に匹敵する強度を得るため
である。In this invention, underwater curing is used as a curing means for cement products in order to avoid the high heat caused by autoclaving, and in conjunction with strengthening the bonding strength of the cement matrix by limiting the plain values of cement and silica as described above. This is to obtain strength comparable to autoclave curing.
次に、この発明の詳細な説明する。 Next, the present invention will be explained in detail.
セメントとして、プレーン値6000cm3/g、シリ
カとしてプレーン値10000 cm3/gのものを用
い、表1の配合原料を乾燥状態で均一混合し、乾式法に
て、厚さ5mm、縦横45cm X 90c端の板材を
多数成形し、2日間、大気中で自然養生した後、2週間
水中養生を行なった。Using cement with a plain value of 6,000 cm3/g and silica with a plain value of 10,000 cm3/g, the blended raw materials in Table 1 were mixed uniformly in a dry state, and a piece of 5 mm thick, 45 cm long and wide, with 90 cm ends was prepared using a dry method. A large number of plates were formed, and after being naturally cured in the air for two days, they were cured in water for two weeks.
その後、JIS4号曲げテストを行なったところ、表1
下欄の結果となった。After that, when we conducted a JIS No. 4 bending test, Table 1
The results are shown in the column below.
表1
表2
次に、比較例として、実施例1〜4における水中養生に
代え、178℃×10時間の条件でオートクレーブ養生
を行なった。Table 1 Table 2 Next, as a comparative example, instead of the underwater curing in Examples 1 to 4, autoclave curing was performed at 178° C. for 10 hours.
上記板材についてJIS4号曲げテストを行なったとこ
ろ、表2の結果となり補強繊維の熱劣化による物性の低
下が判明した。When a JIS No. 4 bending test was conducted on the above-mentioned plate material, the results shown in Table 2 showed that the physical properties had deteriorated due to thermal deterioration of the reinforcing fibers.
次に、プレーン値3000aj/g のセメントとプ
レーン値4000cd/gのシリカを用いた他は、実施
例と同様にして水中養生により板材を成形し、これらに
ついてJISd号曲げテストを行なったところ、表3の
結果となり実施例に比較して、かなり強度が劣ることが
判明した。Next, plates were formed by curing in water in the same manner as in the example except that cement with a plain value of 3000 aj/g and silica with a plain value of 4000 cd/g were used, and a JIS No. d bending test was performed on these plates. 3, and it was found that the strength was considerably inferior compared to the example.
表3
JISA号曲げテスト
次に、上記比較例2−1〜2−4において、水中養生に
代え、178℃×10時間のオートクレーブ養生を行い
、JISJ号曲げテストを行なったところ、表4の結果
となり、やはり、実施例に至る強度が得られないことが
判明した。Table 3 JIS J bending test Next, in Comparative Examples 2-1 to 2-4 above, instead of curing in water, autoclave curing was performed at 178°C for 10 hours, and a JIS J bending test was conducted. The results shown in Table 4 Therefore, it was found that the strength equivalent to that of the example could not be obtained.
表4 〔効果〕Table 4 〔effect〕
Claims (1)
メント35〜45重量%、プレーン値10000〜12
000cm^3/gのシリカ30〜40重量%より成る
セメント、シリカ配合物に粗骨材及び石綿以外の補強繊
維を残部重量%添加して混合し、加水の上賦形体を成形
し、該賦形体を自然養生し、次いで、2週間以上水中養
生を行なうことを特徴とする繊維セメント板の製造方法
。(1) Plain value 6000-8000cm^3/g cement 35-45% by weight, plain value 10000-12
000cm^3/g of cement consisting of 30 to 40% by weight of silica, a silica blend, with the remaining weight% of reinforcing fibers other than coarse aggregate and asbestos added, mixed with water, and shaped into a shaped body. A method for manufacturing a fiber cement board, which comprises curing the shape naturally and then curing it in water for two weeks or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1377389A JPH02196051A (en) | 1989-01-23 | 1989-01-23 | Production of fiber-cement board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1377389A JPH02196051A (en) | 1989-01-23 | 1989-01-23 | Production of fiber-cement board |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02196051A true JPH02196051A (en) | 1990-08-02 |
Family
ID=11842569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1377389A Pending JPH02196051A (en) | 1989-01-23 | 1989-01-23 | Production of fiber-cement board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02196051A (en) |
-
1989
- 1989-01-23 JP JP1377389A patent/JPH02196051A/en active Pending
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