JPH061643A - Manufacturing method of fiber reinforced cement board - Google Patents
Manufacturing method of fiber reinforced cement boardInfo
- Publication number
- JPH061643A JPH061643A JP18993692A JP18993692A JPH061643A JP H061643 A JPH061643 A JP H061643A JP 18993692 A JP18993692 A JP 18993692A JP 18993692 A JP18993692 A JP 18993692A JP H061643 A JPH061643 A JP H061643A
- Authority
- JP
- Japan
- Prior art keywords
- raw material
- weight
- cement
- fiber
- siliceous
- 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
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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/047—Zeolites
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Civil Engineering (AREA)
- Producing Shaped Articles From Materials (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
(57)【要約】
【目的】 乾式法においてパルプ繊維と無機質配合物と
の親和性を顕著に改善し、もって高強度の繊維補強セメ
ント板の製造方法を提供することを目的とする。
【構成】 セメント45〜55重量％、ゼオライト又はシリ
カヒュームなどのシリカ質原料 8〜12重量％、パルプ繊
維 5〜8 重量％、粉砕石粉30〜40重量％からなるセメン
ト配合において、ゼオライト又はシリカヒュームなどの
シリカ質原料を 100℃以上に加熱し、該原料と含水率25
〜30％としたパルプ繊維とを均一混合し、次いで他の無
機質原料を添加して均一混合し、該原料を成形ベルト上
に層状に供給し乾式法により板状体を成形し養生硬化さ
せる工程よりなり、シリカ質原料の加熱活性化により含
水繊維とシリカ質原料の積極的付着を図り、これを媒介
としてセメントとの結合性を高める。(57) [Summary] [Purpose] It is an object of the present invention to provide a method for producing a fiber reinforced cement board having a high strength by significantly improving the affinity between pulp fibers and an inorganic compound in the dry method. [Composition] In a cement mixture consisting of 45 to 55% by weight of cement, 8 to 12% by weight of siliceous raw material such as zeolite or silica fume, 5 to 8% by weight of pulp fiber, and 30 to 40% by weight of ground stone powder, zeolite or silica fume is used. When a siliceous material such as is heated to 100 ° C or higher,
Step of uniformly mixing with pulp fiber made up to -30%, then adding other inorganic raw materials and mixing them uniformly, supplying the raw materials in layers on a forming belt to form a plate-like body by a dry method and curing and curing By virtue of the heat activation of the siliceous raw material, the water-containing fiber and the siliceous raw material are positively adhered to each other, and the bondability with the cement is enhanced through this.
Description
【０００１】[0001]
【産業上の利用分野】この発明は、繊維補強セメント板
の製造方法に関し、詳しくは乾式法において高強度の繊
維補強セメント板を製造する方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced cement board, and more particularly to a method for producing a high-strength fiber-reinforced cement board by a dry method.
【０００２】[0002]
【従来の技術】従来、繊維補強セメント板、主として平
板状屋根材の製造方法として、補強繊維を添加した粉状
セメント混合物を成形ベルト上へ層状に供給し、加水の
上ロールで圧縮し、板状体を成形し所定長さに裁断後、
オートクレーブにより養生硬化させて製品とする、いわ
ゆる乾式法が知られている。ところで、上記繊維補強セ
メント板の製造方法における補強繊維として、石綿が伝
統的に使用されてきたが、石綿は公害の原因となること
から使用の制限ないしは全廃が強く要請され、その代替
繊維としてパルプ繊維などの使用が検討されている。こ
のパルプ繊維は、耐熱性、耐アルカリ性などを有し、ま
たセメントマトリックスに対する結合性などに優れ、他
の合成樹脂繊維に比較してかなり有望とされている。2. Description of the Related Art Conventionally, as a method for producing a fiber-reinforced cement board, mainly a flat roofing material, a powdery cement mixture containing reinforcing fibers is supplied in layers on a molding belt, compressed with water and rolled into a board. After molding the shaped body and cutting it to a predetermined length,
A so-called dry method is known in which a product is cured and cured by an autoclave to obtain a product. By the way, asbestos has been traditionally used as a reinforcing fiber in the method for producing the fiber-reinforced cement plate, but asbestos is a cause of pollution, so use restriction or total abolition is strongly requested, and pulp is used as an alternative fiber. The use of fibers is being considered. This pulp fiber has heat resistance, alkali resistance, and the like, and is excellent in the bondability to the cement matrix, so that it is considered to be quite promising as compared with other synthetic resin fibers.
【０００３】[0003]
【従来技術の問題点】しかし、上記パルプ繊維はセメン
ト等の無機質原料に対する付着性が悪く、セメントマト
リックスに対する密着性が十分でなく、添加に見合った
補強効果が得難いといった問題があった。このような問
題を解消するため、セメント配合中シリカ原料として反
応性の高いブレーン値7000cm2/g 以上の微粉シリカを使
用し、セメントマトリックスの結合強度を高めて製品強
度を高めることが種々試みられている。しかし、パルプ
繊維とこれら無機質配合物との親和性が改良できない限
り、抜本的解決とはならない問題があった。However, there is a problem that the above-mentioned pulp fibers have poor adhesion to inorganic raw materials such as cement, insufficient adhesion to the cement matrix, and it is difficult to obtain a reinforcing effect commensurate with addition. In order to eliminate such problems, various attempts have been made to increase the bond strength of the cement matrix and the product strength by using highly reactive fine powder silica with a Blaine value of 7,000 cm 2 / g or more as the silica raw material in the cement formulation. ing. However, there has been a problem that it cannot be a drastic solution unless the affinity between pulp fibers and these inorganic compounds can be improved.
【０００４】[0004]
【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、乾式法においてパルプ繊維と無機質配合物との
親和性を顕著に改善し、もって高強度の繊維補強セメン
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 problems, the present invention provides a method for producing a high-strength fiber-reinforced cement board by significantly improving the affinity between pulp fibers and an inorganic compound in the dry method. It was made for the purpose of doing.
【０００５】[0005]
【課題を解決するための手段】即ち、この発明の繊維補
強セメント板の製造方法は、セメント45〜55重量％、ゼ
オライト又はシリカヒュームなどのシリカ質原料 8〜12
重量％、パルプ繊維 5〜8 重量％、粉砕石粉30〜40重量
％からなるセメント配合において、ゼオライト又はシリ
カヒュームなどのシリカ質原料を 100℃以上に加熱し、
該原料と含水率25〜30％としたパルプ繊維とを均一混合
し、次いで他の無機質原料を添加して均一混合し、該原
料を成形ベルト上に層状に供給し乾式法により板状体を
成形し養生硬化させることを特徴とするものである。[Means for Solving the Problems] That is, the method for producing a fiber-reinforced cement plate of the present invention comprises 45 to 55% by weight of cement, a siliceous raw material 8 to 12 such as zeolite or silica fume.
Wt%, pulp fiber 5-8 wt%, crushed stone powder 30-40 wt% in a cement formulation, heating the silica material such as zeolite or silica fume to 100 ℃ or more,
The raw material and pulp fibers having a water content of 25 to 30% are uniformly mixed, and then other inorganic raw materials are added and uniformly mixed, and the raw material is fed in layers on a molding belt to form a plate-like body by a dry method. It is characterized by being molded and cured by curing.
【０００６】[0006]
【作用】この発明は、繊維補強セメント板を製造する手
段として乾式法を前提とし、その材料配合等はこれら製
法におけるものと同じであり特に記する点はない。The present invention is premised on the dry method as a means for producing a fiber reinforced cement board, and the material composition and the like are the same as those in these production methods, and there is no particular description.
【０００７】この発明において、配合材料を調整する段
階においてまずゼオライト又はシリカヒュームなどのシ
リカ質原料を 100℃以上に加熱し、該原料と含水率25〜
30％としたパルプ繊維とを均一混合する。シリカ質原料
は、加熱により元々内部に含まれていた水分が蒸発し、
その後は吸水しやすい不安定な状態、言い換えれば活性
化された状態となる。従って、このように加熱処理した
シリカ質原料に含水率25〜30％としたパルプ繊維を添加
すれば、その水分を急激に吸収しようとするシリカ質原
料に吸着される現象が生じる。従って、パルプ繊維周囲
にはこれらシリカ質原料が吸着され言わばコーティング
された状態となる。In the present invention, at the stage of adjusting the blended material, first, a siliceous raw material such as zeolite or silica fume is heated to 100 ° C. or higher to give the raw material and a water content of 25 to
Homogenously mix with 30% pulp fiber. When the siliceous raw material is heated, the water originally contained therein evaporates,
After that, it becomes an unstable state in which water is easily absorbed, in other words, an activated state. Therefore, when pulp fibers having a water content of 25 to 30% are added to the heat-treated siliceous raw material, a phenomenon occurs in which the moisture is adsorbed by the siliceous raw material which is about to be absorbed rapidly. Therefore, these siliceous raw materials are adsorbed around the pulp fibers, and are in a coated state.
【０００８】この状態の補強繊維をセメントなどの残余
の配合材料と混合すれば、補強繊維表面に付着シリカを
媒介としてセメントが化学的に付着し、補強繊維とセメ
ントマトリックスとの密着性が著しく改良される。よっ
て高強度の繊維補強セメント板が製造できるのである。When the reinforcing fibers in this state are mixed with the rest of the compounding material such as cement, the cement chemically adheres to the surface of the reinforcing fibers via the adhered silica, and the adhesiveness between the reinforcing fibers and the cement matrix is remarkably improved. To be done. Therefore, a high strength fiber reinforced cement board can be manufactured.
【０００９】[0009]
【実施例】次にこの発明の実施例を説明する。Embodiments of the present invention will be described below.
【００１０】実施例１ セメント50重量％、ゼオライト10重量％、パルプ繊維 5
重量％、粉砕石粉35重量％よりなる配合とし、まずゼオ
ライトを 100℃に加熱し、ついで含水率30％に調整した
パルプ繊維を添加し均一に混合した。このゼオライトと
パルプ混合物に残余の原料を添加し均一混合後、常法の
乾式法により厚さ５mmの板状体を成形し、縦45cm、横90
cmに裁断し２日間自然養生後、 140℃×15時間の高温高
圧養生を行い試験片を得た。Example 1 Cement 50% by weight, zeolite 10% by weight, pulp fiber 5
%, And 35% by weight of ground stone powder. Zeolite was first heated to 100 ° C., and then pulp fibers adjusted to a water content of 30% were added and uniformly mixed. The remaining raw materials were added to this zeolite and pulp mixture and mixed homogeneously, and then a plate-like body having a thickness of 5 mm was formed by a conventional dry method, and the length was 45 cm and the width was 90 mm.
After being cut into cm and naturally cured for 2 days, high temperature and high pressure curing at 140 ° C. for 15 hours was performed to obtain a test piece.
【００１１】実施例２ 実施例１におけるゼオライトに替えシリカヒュームを使
用した他は実施例１と同様にして試験片を得た。Example 2 A test piece was obtained in the same manner as in Example 1 except that silica fume was used instead of the zeolite in Example 1.
【００１２】比較例１ 加熱処理をしない他は実施例１と全く同じ原料を使用し
て実施例１と同様にして試験片を得た。Comparative Example 1 A test piece was obtained in the same manner as in Example 1, except that the same raw material as in Example 1 was used except that no heat treatment was performed.
【００１３】比較例２ 加熱処理をしない他は実施例２と全く同じ原料を使用し
て実施例１と同様にして試験片を得た。Comparative Example 2 A test piece was obtained in the same manner as in Example 1, except that the same raw material as in Example 2 was used except that no heat treatment was performed.
【００１４】上記実施例１、２及び比較例１、２で得た
試験片についてJIS 4 号曲げ試験を行ったところ表１の
結果となった。When the JIS No. 4 bending test was conducted on the test pieces obtained in Examples 1 and 2 and Comparative Examples 1 and 2, the results shown in Table 1 were obtained.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【発明の効果】以上説明したように、この発明におい
て、セメントスラリーを調整する場合において、補強繊
維に加熱により活性化されたシリカ質原料が積極的に吸
着するのでこれを媒介としてセメントとの化学的結合強
度が非常に向上され、従来では得られなかった高強度な
繊維補強セメント板を製造することが可能となるのであ
る。As described above, according to the present invention, when the cement slurry is prepared, the siliceous raw material activated by heating is positively adsorbed to the reinforcing fiber, and this is used as a medium for chemistry with the cement. The mechanical bond strength is greatly improved, and it becomes possible to manufacture a high-strength fiber-reinforced cement board that has never been obtained before.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 28/18 32/02 Ｅ 40/02 //(Ｃ０４Ｂ 28/18 14:02 Ｚ 2102−4Ｇ 16:02） Ｚ 2102−4Ｇ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical display location C04B 28/18 32/02 E 40/02 // (C04B 28/18 14:02 Z 2102-4G 16:02) Z 2104-2G
Claims (1)
シリカヒュームなどのシリカ質原料 8〜12重量％、パル
プ繊維 5〜8 重量％、粉砕石粉30〜40重量％からなるセ
メント配合において、ゼオライト又はシリカヒュームな
どのシリカ質原料を 100℃以上に加熱し、該原料と含水
率25〜30％としたパルプ繊維とを均一混合し、次いで他
の無機質原料を添加して均一混合し、該原料を成形ベル
ト上に層状に供給し乾式法により板状体を成形し養生硬
化させることを特徴とする繊維補強セメント板の製造方
法。1. A cement composition comprising 45 to 55% by weight of cement, 8 to 12% by weight of a siliceous raw material such as zeolite or silica fume, 5 to 8% by weight of pulp fiber, and 30 to 40% by weight of ground stone powder. A siliceous raw material such as silica fume is heated to 100 ° C. or more, the raw material and the pulp fiber having a water content of 25 to 30% are uniformly mixed, and then another inorganic raw material is added to uniformly mix the raw material. A method for producing a fiber-reinforced cement board, which comprises supplying a layer on a forming belt, forming a plate-like body by a dry method, and curing and curing the plate-like body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18993692A JPH061643A (en) | 1992-06-23 | 1992-06-23 | Manufacturing method of fiber reinforced cement board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18993692A JPH061643A (en) | 1992-06-23 | 1992-06-23 | Manufacturing method of fiber reinforced cement board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH061643A true JPH061643A (en) | 1994-01-11 |
Family
ID=16249691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18993692A Pending JPH061643A (en) | 1992-06-23 | 1992-06-23 | Manufacturing method of fiber reinforced cement board |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH061643A (en) |
-
1992
- 1992-06-23 JP JP18993692A patent/JPH061643A/en active Pending
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