JPH07150686A - Shearing reinforcing bar fiber reinforced resin composite material and manufacture of the same - Google Patents
Shearing reinforcing bar fiber reinforced resin composite material and manufacture of the sameInfo
- Publication number
- JPH07150686A JPH07150686A JP5298481A JP29848193A JPH07150686A JP H07150686 A JPH07150686 A JP H07150686A JP 5298481 A JP5298481 A JP 5298481A JP 29848193 A JP29848193 A JP 29848193A JP H07150686 A JPH07150686 A JP H07150686A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- composite material
- mandrel
- resin composite
- 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
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、コンクリート建造物や
コンクリート製品などを形成するコンクリート型枠内に
埋設する剪断補強筋繊維強化樹脂複合材及びその製造法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear-reinforced muscle fiber reinforced resin composite material embedded in a concrete formwork forming a concrete building or concrete product, and a method for producing the same.
【0002】[0002]
【従来の技術】従来、鉄筋の代替材繊維強化樹脂複合材
は、色々なものが提案されている。特開平1−2060
22号公報では棒状の繊維強化樹脂製鉄筋代替材を曲げ
加工しても曲げ部の強度が低下しない方法を提唱してい
る。また、特開平2−255323号公報ではこの曲げ
たものを別の繊維で巻き付け補強する方法が提唱されて
いる。そのほかに特開平2−200945号公報には、
曲げ加工を施さない方法として特殊割型マンドレルを使
用し曲線と直線もしくは直線に近い曲線とにより構成さ
せる断面を持つものが提唱されている。2. Description of the Related Art Conventionally, various fiber-reinforced resin composite materials have been proposed as substitute materials for reinforcing bars. Japanese Patent Laid-Open No. 1-2060
Japanese Patent No. 22 proposes a method in which the strength of the bent portion does not decrease even when the rod-shaped fiber-reinforced resin reinforcing bar substitute is bent. Further, Japanese Patent Application Laid-Open No. 2-255323 proposes a method of winding and reinforcing the bent one with another fiber. In addition, in Japanese Patent Laid-Open No. 2-200945,
As a method that does not perform bending work, it is proposed to use a special split type mandrel and have a cross section composed of a curved line and a straight line or a curve close to a straight line.
【0003】[0003]
【発明が解決しようとする課題】このうち前2つは、曲
げ加工を所詮施す手法であって、曲げ部のひずみを完全
になくすことは不可能であり曲げ部の強度低下は免れ
ず、かつ、各種補強法を採ったにしても疲労強度、衝撃
強度は所詮低下してしまう。そのため3番目の閉合形状
を持つものを提唱している。しかし、特開平2−200
945号公報では特殊な割型を採用するためマンドレル
価格も高く、作業性が悪いため高価なものになる。Of these, the first two are methods for performing bending after all, and it is impossible to completely eliminate the strain in the bent portion, and the decrease in strength of the bent portion cannot be avoided, and However, even if various reinforcement methods are adopted, the fatigue strength and impact strength will eventually decrease. Therefore, we propose a third closed shape. However, JP-A-2-200
In 945, since a special split mold is adopted, the mandrel price is high, and the workability is poor, so that it is expensive.
【0004】そこで、本発明では前記したような特別な
曲げ加工をせず、しかも曲げ部が強い閉合形状を容易に
かつ大量に製造する方法を提供することを目的とする。Therefore, it is an object of the present invention to provide a method for easily and mass-producing a closed shape having a strong bent portion without the above-described special bending work.
【0005】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明は、閉合形状の繊維強化複合材の断面形状を正
方形もしくは長方形にすること、及び、角形マンドレル
に樹脂を含浸した繊維を巻き付け、その上に熱収縮テー
プを巻き付けた後バグにくるみ内部を減圧にして硬化さ
せた成形体をスリットして閉合形状の繊維強化樹脂複合
材の断面形状を正方形もしくは長方形に規制する繊維強
化樹脂複合材を製造する方法を要旨とする。In order to achieve the above object, the present invention provides a closed fiber-reinforced composite material having a square or rectangular cross-section, and winding a resin-impregnated fiber around a square mandrel. After wrapping a heat-shrinkable tape on it, it is wrapped in a bag and the inside pressure is reduced and the molded body is slit to restrict the cross-sectional shape of the closed fiber-reinforced resin composite material to a square or rectangular fiber-reinforced resin composite. The gist is the method of manufacturing the material.
【0006】また、本発明は、表面の接着性を向上させ
る方法として、マンドレルに樹脂を含浸する繊維を巻く
前に該繊維巻き方向と交叉、或いは直交する方向に離型
性の繊維を配置し、樹脂含浸繊維を巻き付け或いはさら
に熱収縮テープを巻き付けた後、その上面に同様に離型
性繊維を配した後、前記と同様に成形、硬化、脱芯、ス
リットして外内面に離型繊維を取った溝を有する剪断補
強筋繊維強化樹脂複合材の製造方法や、マンドレルに樹
脂含浸繊維の巻き方向と交叉或いは直交する方向に溝を
形成し、該マンドレルに繊維巻き付け、或いはさらに熱
収縮テープを巻き付けた後、溝付き型を押し付け、その
後前記と同様に成形、硬化、脱芯、スリットして外内面
に樹脂突起を有する剪断補強筋繊維強化樹脂複合材の製
造方法、及びこの方法により得られた複合体を提供す
る。Further, the present invention provides a method for improving the adhesiveness of the surface by arranging releasable fibers in a direction intersecting or orthogonal to the fiber winding direction before winding the resin impregnated fiber on the mandrel. After wrapping the resin-impregnated fiber or further winding the heat-shrinkable tape, arranging the releasable fiber on the upper surface in the same manner, and then molding, curing, de-coreing and slitting the releasable fiber on the outer and inner surfaces in the same manner as described above. A method for producing a shear-reinforced fiber-reinforced resin composite material having a groove formed therein, or forming a groove on a mandrel in a direction intersecting or orthogonal to the winding direction of the resin-impregnated fiber, and winding the fiber around the mandrel, or further a heat shrink tape After winding, press the grooved mold, then molding, curing, decoreing, slitting in the same manner as described above, a method for producing a shear-reinforced muscle fiber reinforced resin composite material having resin protrusions on the outer and inner surfaces, and this Providing the composite obtained by law.
【0007】以下に本発明を詳細に説明する。本発明に
用いる連続繊維は、炭素繊維、アラミド繊維、ガラス繊
維などのいずれであってもよい。また樹脂は、エポキシ
樹脂、フェノール樹脂、ポリイミド樹脂などのいずれの
樹脂であってもよい。The present invention will be described in detail below. The continuous fiber used in the present invention may be any of carbon fiber, aramid fiber, glass fiber and the like. Further, the resin may be any resin such as epoxy resin, phenol resin, and polyimide resin.
【0008】図1の角形マンドレル1に樹脂を含浸した
連続繊維2をフィラメントワインディング法などの方法
で巻き付け、その上に表面を平らにするために、例えば
テフロン系の熱収縮テープを巻き付けた後これをバグフ
ィルムにくるんで密封し、バグ内部を1〜10torrの減
圧にひく。この時樹脂の粘度が低すぎる時は、50〜8
0℃で8〜16hr加熱し半硬化状態のプリプレグにす
る。上記減圧度を1〜10torrとしたのは、1torr未満
にすると超真空になり、樹脂の分解が起こるからであ
り、また10torrを超えると、十分なガス抜きができ
ず、繊維間樹脂強度が低下するからである。次にこのバ
グ被包品を硬化炉に装入し約150℃の温度で硬化させ
て成形体とし、これをマンドレルより脱芯した後、適宜
の幅でスリットして製品とする(図2,図3)。このバ
グ硬化を実施しないと製品樹脂内にボイドが存在し強度
が落ちるためで、かつ断面形状を正方形もしくは長方形
に規制することができなくなる。A continuous mandrel 2 impregnated with a resin is wound around a square mandrel 1 of FIG. 1 by a method such as a filament winding method, and a Teflon-based heat shrink tape is wound on the mandrel 1 to make the surface flat. Is wrapped in a bag film and sealed, and the inside of the bag is subjected to a reduced pressure of 1 to 10 torr. At this time, if the viscosity of the resin is too low, 50 to 8
Heat at 0 ° C for 8 to 16 hours to obtain a semi-cured prepreg. The reason why the degree of pressure reduction is 1 to 10 torr is that if it is less than 1 torr, it becomes an ultra-vacuum and the resin is decomposed, and if it exceeds 10 torr, sufficient degassing cannot be performed and the resin strength between fibers decreases. Because it does. Next, the bag-encapsulated product is charged into a curing furnace and cured at a temperature of about 150 ° C. to obtain a molded body, which is decoreed from the mandrel and then slit into a product with an appropriate width (FIG. 2, FIG. 2). (Figure 3). If this bug is not cured, voids will be present in the product resin and the strength will decrease, and it will not be possible to regulate the cross-sectional shape to a square or a rectangle.
【0009】また、表面の接着性を向上させる方法とし
て、樹脂を含浸した連続繊維を巻く前に、あらかじめマ
ンドレル表面に該繊維巻き方向と交叉する方向、好まし
くは直交方向に離型性のポリエチ繊維、テフロン繊維な
どの繊維を適宜の間隔に配置固定し、その上に樹脂含浸
した連続繊維を巻き付け、さらに熱収縮テープを巻き付
けた後、同様の方向に離型性繊維を配し、その後、上記
と同様にバグ成形、硬化、脱芯、スリットして外内面か
ら離型繊維を剥離除去すると、図4に示すような溝付き
製品を得ることができる。また、マンドレルへの繊維巻
き方向と交叉する方向或いは直交方向に溝を有したマン
ドレルに、前記と同様に連続繊維を巻き付けた後、繊維
巻き付け方向と交叉或いは直交する方向に溝を設けた溝
付き型を押し付けた後、同様にバグ成形、硬化、脱芯、
スリットして図5に示すような外内面に樹脂突起を有す
る製品を製造することができる。Further, as a method of improving the surface adhesiveness, before winding the resin-impregnated continuous fiber, a polyethylene fiber which is releasable in a direction intersecting with the winding direction of the mandrel surface in advance, preferably in the orthogonal direction. , Teflon fibers and other fibers are arranged and fixed at appropriate intervals, and resin-impregnated continuous fibers are wound thereon, and further heat-shrink tape is wound, and then release fibers are arranged in the same direction, and then the above Similarly to the above, by performing bag molding, curing, decoreing, and slitting to remove the release fibers from the outer and inner surfaces, a grooved product as shown in FIG. 4 can be obtained. Also, after winding continuous fibers in the same manner as above on a mandrel having grooves in a direction intersecting or orthogonal to the fiber winding direction on the mandrel, a groove provided in a direction intersecting or orthogonal to the fiber winding direction After pressing the mold, similarly, bug molding, curing, decoreing,
A product having resin protrusions on the outer and inner surfaces as shown in FIG. 5 can be manufactured by slitting.
【0010】[0010]
【実施例】図1に示すように、196mm×196mmのマ
ンドレル1にエポキシ樹脂を含浸したPAN系炭素繊維
2を厚み5mm巻き付け後その上面に幅10mm程度のテフ
ロン系の熱収縮テープを繊維方向と同じ方向に巻き付
け、バグフィルムで全体を包んで密閉した。バグを真空
装置につなぎ、バグ中を真空度5torr程度にし、150
℃で4時間硬化させた。この成形体をマンドレルより脱
芯後、幅10mmにスリットした。EXAMPLE As shown in FIG. 1, a PAN-based carbon fiber 2 impregnated with epoxy resin was wound around a 196 mm × 196 mm mandrel 1 for a thickness of 5 mm, and a Teflon-based heat-shrinkable tape with a width of about 10 mm was applied on the upper surface thereof in the fiber direction. Wrapped in the same direction, wrapped all over with bag film and sealed. Connect the bug to a vacuum device and set the vacuum inside the bug to about 5 torr.
Cured at 4 ° C. for 4 hours. This molded body was decoreed from the mandrel and then slit into a width of 10 mm.
【0011】一方、特開平2−200945号公報に記
述されたPAN系炭素繊維を使用した78.5mm2 の断
面をもつ196mm×196mm角品を比較例とした。On the other hand, a 196 mm × 196 mm square product having a cross section of 78.5 mm 2 using the PAN-based carbon fiber described in JP-A-2-200945 was used as a comparative example.
【0012】上記によって得た製品(実施例と比較例)
を図6に示すように製品(繊維強化複合材)3の両端
を、上下に分離した枠内にゴム6を介して支持されたコ
ンクリート4中に埋め込み、剪断補強筋の曲げ部の引張
試験を実施したところ下記の強度が得られた。 実施例 85kgf/mm2 比較例 57kgf/mm2 Products obtained by the above (Examples and comparative examples)
As shown in FIG. 6, both ends of the product (fiber reinforced composite material) 3 are embedded in concrete 4 supported through rubber 6 in a frame separated into upper and lower parts, and a tensile test of the bending portion of the shear reinforcement bar is performed. As a result, the following strengths were obtained. Example 85 kgf / mm 2 Comparative example 57 kgf / mm 2
【0013】比較例の曲線と直線もしくは直線に近い曲
線とにより構成させる断面を持つものにより本発明の長
方形断面を有するものの方が同断面積で強度も強くかつ
厚み方向を薄くできコンクリートのかぶり量も少なくで
きる。Among the comparative examples having a cross section composed of a curved line and a straight line or a curve close to a straight line, the rectangular cross section of the present invention has the same cross sectional area, stronger strength, thinner thickness direction, and more concrete fogging amount. Can be reduced.
【0014】[0014]
【発明の効果】以上のように、本発明によれば曲げ加工
をせず曲げ部が強い閉合形状を容易にかつ大量に製造す
ることができ、また、この正方形もしくは長方形断面形
状は、ただ繊維を巻くだけでは、製造できず、かつ同断
面積曲線を持つものに比して外部コンクリートのかぶり
量が少なくなるなどの効果がある。As described above, according to the present invention, a closed shape having a strong bent portion can be easily manufactured in a large amount without bending, and this square or rectangular cross-sectional shape is a fiber only. It is not possible to manufacture just by winding, and there is an effect that the amount of external concrete fogging is reduced as compared with those having the same sectional area curve.
【0015】加えて、外内面に溝もしくは突起を持つこ
とを特徴とする剪断補強筋繊維強化樹脂複合材はコンク
リートとの接着性が向上することが期待できる。In addition, the shear reinforcing fiber-reinforced resin composite material having grooves or protrusions on the outer and inner surfaces can be expected to have improved adhesion to concrete.
【図1】角マンドレルに繊維を巻き付けた様子を示した
模式図。FIG. 1 is a schematic view showing a state in which fibers are wound around a square mandrel.
【図2】脱芯後の繊維強化樹脂複合材の切断断面を示
す。FIG. 2 shows a cut cross section of a fiber-reinforced resin composite material after decoreing.
【図3】図2のA−A′切断面を示す。3 is a sectional view taken along the line AA ′ of FIG.
【図4】溝付き繊維強化樹脂複合材剪断補強筋の断面を
示す。FIG. 4 shows a cross section of a grooved fiber reinforced resin composite shear reinforcement bar.
【図5】樹脂突起を持った繊維強化樹脂複合材剪断補強
筋の断面を示す。FIG. 5 shows a cross section of a fiber-reinforced resin composite shear reinforcement bar with resin protrusions.
【図6】コンクリート中に埋め込んだ剪断補強筋の曲げ
部の引張試験の様子を示した。FIG. 6 shows a state of a tensile test of a bending portion of a shear reinforcing bar embedded in concrete.
1 角マンドレル 2 樹脂を含浸した繊維 3 繊維強化樹脂複合材 4 コンクリート 5 鉄プレート 6 ゴム 1 Square Mandrel 2 Fiber Impregnated with Resin 3 Fiber Reinforced Resin Composite Material 4 Concrete 5 Iron Plate 6 Rubber
───────────────────────────────────────────────────── フロントページの続き (72)発明者 那珂 亮一 東京都千代田区大手町2−6−3 新日本 製鐵株式会社内 (72)発明者 関 俊明 千葉県君津市陽光台2−8−3 203 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Ryoichi Naka 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Toshiaki Seki 2-8-3 Yokodai, Kimitsu, Chiba Prefecture 203
Claims (5)
維強化樹脂複合材の断面形状を正方形もしくは長方形に
規制することを特徴とする剪断補強筋繊維強化樹脂複合
材。1. A shear-reinforcing fiber-reinforced resin composite material, wherein the cross-sectional shape of a closed-shape fiber-reinforced resin composite material used as a shear reinforcing bar is restricted to a square or a rectangle.
徴とする請求項1記載の剪断補強筋繊維強化樹脂複合
材。2. The shear-reinforced muscle fiber reinforced resin composite material according to claim 1, which has grooves or protrusions on its outer and inner surfaces.
巻き付け、その上に熱収縮テープを巻き付けた後、バグ
にくるみ内部を減圧にして硬化させた成形体を、スリッ
トして閉合形状の繊維強化樹脂複合材の断面形状を正方
形もしくは長方形に規制することを特徴とする剪断補強
筋繊維強化樹脂複合材の製造法。3. A rectangular mandrel is wrapped with a resin-impregnated fiber, a heat-shrinkable tape is wrapped around the wound mandrel, a bag is wrapped around a bag, and the inside is reduced in pressure to cure the molded body. A method for producing a shear-reinforced muscle fiber reinforced resin composite material, characterized in that the cross-sectional shape of the resin composite material is restricted to a square or a rectangle.
巻く前に、繊維巻き方向と交叉する方向にあらかじめ離
型性の繊維を配し、次いで樹脂含浸さらに熱収縮繊維テ
ープを巻き付けた後、その上面に離型性繊維を配置し、
その後に請求項3と同様に成形、硬化、脱芯、スリット
し、外内面に離型性繊維を除去して形成した溝を有する
ことを特徴とする剪断補強筋繊維強化樹脂複合材の製造
法。4. The method according to claim 3, wherein, before winding the fiber around the mandrel, a mold-releasing fiber is arranged in advance in a direction intersecting with the winding direction of the mandrel, and then a resin-impregnated fiber and a heat-shrinkable fiber tape are wound thereon. Place the release fiber on the upper surface,
A method for producing a shear-reinforced muscle fiber reinforced resin composite material, characterized in that after that, it has a groove formed by molding, curing, decoreing, slitting, and removing the releasing fiber on the outer and inner surfaces in the same manner as in claim 3. .
交叉する方向に溝を形成し、樹脂含浸繊維さらに熱収縮
テープを巻き付けた後溝付き型を押し付け、請求項3と
同様に成形、硬化、脱芯、スリットして外内面に樹脂突
起を有することを特徴とする剪断補強筋繊維強化樹脂複
合材の製造法。5. A groove is formed in the mandrel of claim 3 in a direction intersecting the fiber winding direction, a resin-impregnated fiber is further wound with a heat-shrinkable tape, and a grooved die is pressed, followed by molding and curing in the same manner as in claim 3. A method for producing a shear-reinforced muscle fiber reinforced resin composite material, which comprises debossing, slitting, and having a resin protrusion on the outer and inner surfaces.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5298481A JPH07150686A (en) | 1993-11-29 | 1993-11-29 | Shearing reinforcing bar fiber reinforced resin composite material and manufacture of the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5298481A JPH07150686A (en) | 1993-11-29 | 1993-11-29 | Shearing reinforcing bar fiber reinforced resin composite material and manufacture of the same |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH07150686A true JPH07150686A (en) | 1995-06-13 |
Family
ID=17860264
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5298481A Pending JPH07150686A (en) | 1993-11-29 | 1993-11-29 | Shearing reinforcing bar fiber reinforced resin composite material and manufacture of the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH07150686A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009269348A (en) * | 2008-05-09 | 2009-11-19 | Kurashiki Kako Co Ltd | Core for molding |
JP2010125825A (en) * | 2008-12-01 | 2010-06-10 | Toyota Motor Corp | Method and apparatus for manufacturing high-pressure gas tank |
CN107366388A (en) * | 2017-07-26 | 2017-11-21 | 哈尔滨工业大学 | A kind of closed square-section FRP stirrups and preparation method thereof |
-
1993
- 1993-11-29 JP JP5298481A patent/JPH07150686A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009269348A (en) * | 2008-05-09 | 2009-11-19 | Kurashiki Kako Co Ltd | Core for molding |
JP2010125825A (en) * | 2008-12-01 | 2010-06-10 | Toyota Motor Corp | Method and apparatus for manufacturing high-pressure gas tank |
CN107366388A (en) * | 2017-07-26 | 2017-11-21 | 哈尔滨工业大学 | A kind of closed square-section FRP stirrups and preparation method thereof |
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