JPH02175643A - Production of fiber-reinforced cement board - Google Patents
Production of fiber-reinforced cement boardInfo
- Publication number
- JPH02175643A JPH02175643A JP33301388A JP33301388A JPH02175643A JP H02175643 A JPH02175643 A JP H02175643A JP 33301388 A JP33301388 A JP 33301388A JP 33301388 A JP33301388 A JP 33301388A JP H02175643 A JPH02175643 A JP H02175643A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- pulp
- weight
- curing
- fibers
- 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 14
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000000835 fiber Substances 0.000 claims abstract description 37
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 12
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims abstract description 12
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims abstract description 12
- 235000009120 camo Nutrition 0.000 claims abstract description 12
- 235000005607 chanvre indien Nutrition 0.000 claims abstract description 12
- 239000011487 hemp Substances 0.000 claims abstract description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000011812 mixed powder Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000010425 asbestos Substances 0.000 abstract description 7
- 229910052895 riebeckite Inorganic materials 0.000 abstract description 7
- 238000000465 moulding Methods 0.000 abstract description 3
- 239000012615 aggregate Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012783 reinforcing fiber Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は繊維補強セメン１−板の製造方法に関し、詳
しくはいわゆる乾式製法による繊維補強セメント板の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing fiber-reinforced cement boards, and more particularly to a method for manufacturing fiber-reinforced cement boards by a so-called dry manufacturing method.
セメント製品の補強用繊維として、石綿は製品強度のみ
ならず、上記セメント製品の製造工程時における未硬化
時、例えば乾式製法における成形ベルト上での未硬化製
品に対しても曲げ強度、耐クラツク性を付与するため、
セメント製品の補強材として極めて有用であることは周
知のとおりであるが、石綿は粉塵公害の原因となり、ま
た、方において資源の枯渇といったことよりその使用の
制限ないしは全廃が強く要請されつつある。As a reinforcing fiber for cement products, asbestos not only improves product strength, but also improves bending strength and crack resistance when uncured during the cement product manufacturing process, for example, when uncured on a forming belt in a dry process. In order to grant
Although it is well known that asbestos is extremely useful as a reinforcing material for cement products, it causes dust pollution, and due to the depletion of resources, there are strong calls for its use to be restricted or completely abolished.
従って、石綿に代わる補強繊維の開発が種々活発に試み
られているところである。Therefore, various efforts are being made to develop reinforcing fibers to replace asbestos.
一般に乾式製法においては、硬化養生時に高温高圧のオ
ートクレーブ養生を行なうため、上記石綿代替繊維とし
ては、該養生中の熱により劣化しない繊維を選ぶ必要が
有り、従って、原則的に有機合成繊維を除（、他の拐質
の繊維とすることが前提となる。Generally, in the dry manufacturing method, autoclave curing at high temperature and high pressure is performed during curing, so it is necessary to select fibers that do not deteriorate due to the heat during curing as the above-mentioned asbestos alternative fiber. Therefore, in principle, organic synthetic fibers are excluded. (The prerequisite is that the fibers are of other types.
これら繊維としては、ガラス繊維、炭素繊維などの無機
、有機繊維、パルプ、麻繊維など天然有機繊維が考えら
れるが、前者のガラス繊維、炭素繊維等は材質が硬くも
ろい性質を有するため、原料の混合時又は、成板のため
のロール圧延時に折損ないしは破断しやすく、添加に見
合った補強効果が得られない欠点が有った。These fibers can include inorganic fibers such as glass fibers and carbon fibers, organic fibers, pulp, and natural organic fibers such as hemp fibers, but the former glass fibers and carbon fibers are hard and brittle materials, so It has the disadvantage that it is easily broken or broken during mixing or roll rolling for sheet forming, and a reinforcing effect commensurate with its addition cannot be obtained.
一方、パルプ繊維は上述のような問題は無い反面、パル
プ繊維のみでは石綿に比し硬化後の板材強度に問題が有
る。On the other hand, while pulp fibers do not have the above-mentioned problems, pulp fibers alone have problems in the strength of the board after hardening compared to asbestos.
また、麻繊維は、引張り強度にも優れるのであるが、表
面が滑らかであるので、いわゆる繊維の「すり抜け」を
生じやすく、特に未硬化板材のハンドリング時の保型性
に問題が有る。In addition, hemp fibers have excellent tensile strength, but because of their smooth surfaces, the fibers tend to "slip through" and there is a problem in shape retention, especially when handling uncured board materials.
この発明は上記問題点に鑑み、無石綿配合でありながら
、石綿に匹敵する強度を付与できる繊維補強セメント板
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。In view of the above-mentioned problems, the present invention was made with the object of providing a method for producing a fiber-reinforced cement board that is asbestos-free and yet has strength comparable to that of asbestos.
〔課題を解決するに至った技術〕
即し、この発明の繊維補強セメンＩ−板の製造方法はセ
メント３５〜４５重量％、シリカ２５〜３５重量％、骨
材２０〜３０重量％、及びパルプ１〜７重量％の配合物
に対し、前記パルプ繊維ｌに対し、０．１〜０．５重量
％の麻繊維を添加して乾式混合し、混合粉体を成形ベル
１−上に層状に供給して、加水の上一定厚さに成板し、
一定長さに裁断後、一次養生を行ない、次いで高温高圧
オー１−クレープ養生を行なうことを特徴とするもので
ある。[Technology that led to solving the problem] That is, the method for producing fiber-reinforced cement I-board of the present invention uses 35 to 45% by weight of cement, 25 to 35% by weight of silica, 20 to 30% by weight of aggregate, and pulp. Add 0.1 to 0.5 weight % of hemp fiber to the pulp fiber 1 to the blend of 1 to 7 weight %, dry mix it, and layer the mixed powder on the molding bell 1. Supply it, add water and form it into a plate to a certain thickness,
After cutting to a certain length, primary curing is performed, and then high temperature and high pressure 1-crepe curing is performed.
この発明において使用されるセメント、シリカ骨材及び
パルプは、従来の無石綿パルプ配合と同一であり、特に
説明する必要はない。The cement, silica aggregate, and pulp used in this invention are the same as conventional asbestos-free pulp formulations and need not be specifically described.
上記配合において添加される麻繊維は、パルプ繊維と協
同して相剰的に補強効果を発揮するものであって、繊維
の態様として繊維径１０〜５０μ、繊維長３〜５ｍｍの
フィブリル化した麻繊維が用いられる。The hemp fiber added in the above formulation exhibits a reinforcing effect in cooperation with the pulp fiber, and the fiber is fibrillated hemp with a fiber diameter of 10 to 50 μm and a fiber length of 3 to 5 mm. Fibers are used.
この麻繊維は、弾性及び切断強度がパルプ繊維より優れ
、板材成形体に対する補強効果は良いが未硬化板材に対
する成型性にはパルプ繊維より劣る。This hemp fiber has better elasticity and cutting strength than pulp fiber, and has a good reinforcing effect on molded boards, but is inferior to pulp fibers in moldability for uncured boards.
そこで、両者の長所を発揮さゼるよう、（■用するので
ある。Therefore, in order to bring out the strengths of both, we use (■).
上記麻繊維の添加量をパルプ繊維１に対し０．１〜０．
５重量％とするのは、０．１重量％より少ないと、麻繊
維による補強効果が無いのと、パルプ繊維のファイバー
ホール化が充分に防止出来ず、繊維の分散性が改良され
ないからである。The amount of the above-mentioned hemp fiber added is 0.1 to 0.1 to 1 pulp fiber.
The reason why it is set at 5% by weight is that if it is less than 0.1% by weight, there will be no reinforcing effect by the hemp fibers, and the formation of fiber holes in the pulp fibers will not be sufficiently prevented, and the dispersibility of the fibers will not be improved. .
また、０．５重量％より多いと、麻繊維により成型性が
阻害される。Moreover, if it exceeds 0.5% by weight, moldability will be inhibited by the hemp fibers.
次に、この発明の詳細な説明する。 Next, the present invention will be explained in detail.
表１に示す配合をドライミキサに投入し、これを成形ベ
ルトコンベヤ上へ供給し、常法に従い、厚さ４．５ｍｍ
、長さ９１ｃｍ、幅４５ｃｍの板材を成形し、次いで
これを２日間自然一次養生し、その後、１７８℃×１０
時間オートクレーブ養生を行なった。The formulation shown in Table 1 was put into a dry mixer, fed onto a forming belt conveyor, and made into a 4.5 mm thick mold according to a conventional method.
, a board with a length of 91 cm and a width of 45 cm was formed, which was then naturally primary cured for 2 days, and then heated at 178°C x 10
Autoclave curing was performed for an hour.
表１ （表中数字は重量％を示ず）
得た試験片につき、Ｊ １３４号曲げ試験を行ない曲げ
強度、及びたわみを測定したところ、表２の結果となり
、パルプ−庇部合繊維の補強効果の優位性が判明した。Table 1 (Numbers in the table do not indicate weight percent) The J134 bending test was performed on the obtained test piece to measure the bending strength and deflection, and the results shown in Table 2 were obtained, indicating that the pulp-eaves composite fiber reinforcement The effectiveness was found to be superior.
表２ 〔効果〕Table 2 〔effect〕
Claims (1)
量％、骨材２０〜３０重量％、及びパルプ１〜７重量％
の配合物に対し、前記パルプ繊維１に対し、０．１〜０
．５重量％の麻繊維を添加して乾式混合し、混合粉体を
成形ベルト上に層状に供給して、加水の上一定厚さに成
板し、一定長さに裁断後、一次養生を行ない、次いで高
温高圧オートクレーブ養生を行なうことを特徴とする繊
維補強セメント板の製造方法。(1) Cement 35-45% by weight, silica 25-35% by weight, aggregate 20-30% by weight, and pulp 1-7% by weight
0.1 to 0 per 1 pulp fiber for the formulation of
．． 5% by weight of hemp fibers are added and dry mixed, the mixed powder is supplied in layers onto a forming belt, water is added, the plate is formed to a certain thickness, and after cutting to a certain length, primary curing is performed. A method for producing a fiber-reinforced cement board, the method comprising: followed by curing in a high-temperature, high-pressure autoclave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33301388A JPH02175643A (en) | 1988-12-27 | 1988-12-27 | Production of fiber-reinforced cement board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33301388A JPH02175643A (en) | 1988-12-27 | 1988-12-27 | Production of fiber-reinforced cement board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02175643A true JPH02175643A (en) | 1990-07-06 |
Family
ID=18261313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33301388A Pending JPH02175643A (en) | 1988-12-27 | 1988-12-27 | Production of fiber-reinforced cement board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02175643A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225569A (en) * | 2011-04-07 | 2011-10-26 | 西南林业大学 | High-strength inorganic artificial board and manufacturing method thereof |
| CN106082821A (en) * | 2016-06-20 | 2016-11-09 | 安徽金丰新型建材有限公司 | A kind of gangue with antimildew and antibacterial effect is non-burning brick |
| US20210372144A1 (en) * | 2020-05-26 | 2021-12-02 | Champion Link International Corporation | Panel and Method for Producing a Panel |
-
1988
- 1988-12-27 JP JP33301388A patent/JPH02175643A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225569A (en) * | 2011-04-07 | 2011-10-26 | 西南林业大学 | High-strength inorganic artificial board and manufacturing method thereof |
| CN106082821A (en) * | 2016-06-20 | 2016-11-09 | 安徽金丰新型建材有限公司 | A kind of gangue with antimildew and antibacterial effect is non-burning brick |
| US20210372144A1 (en) * | 2020-05-26 | 2021-12-02 | Champion Link International Corporation | Panel and Method for Producing a Panel |
| US11624192B2 (en) * | 2020-05-26 | 2023-04-11 | Champion Link International Corporation | Panel and method for producing a panel |
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