JPH0957882A - Reinforced fiber sheet for reinforcing structure - Google Patents
Reinforced fiber sheet for reinforcing structureInfo
- Publication number
- JPH0957882A JPH0957882A JP7242309A JP24230995A JPH0957882A JP H0957882 A JPH0957882 A JP H0957882A JP 7242309 A JP7242309 A JP 7242309A JP 24230995 A JP24230995 A JP 24230995A JP H0957882 A JPH0957882 A JP H0957882A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- reinforcing
- fiber
- reinforcing fiber
- warp
- 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.)
- Granted
Links
Landscapes
- Bridges Or Land Bridges (AREA)
- Reinforcement Elements For Buildings (AREA)
- Laminated Bodies (AREA)
- Woven Fabrics (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は橋梁や高架道路等を
始め各種構造物の補強または補修する際に用いられ、現
場での施工性が良好で、しかも高い補強強度を有する構
造物補強用強化繊維シ−トに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for reinforcing or repairing various structures including bridges and elevated roads, has good workability on site, and has a high reinforcing strength for reinforcing structures. Regarding the fiber sheet.
【０００２】[0002]
【従来の技術】橋梁や高架道路等の橋脚や梁を繊維強化
プラスチックを用いて補強または補修することが行なわ
れている。従来、その補強または補修（以下、補強と総
称する）する方法として次の方法が行なわれている。2. Description of the Related Art Bridge piers and beams such as bridges and elevated roads have been reinforced or repaired with fiber reinforced plastics. Conventionally, the following method has been performed as a method of reinforcing or repairing (hereinafter collectively referred to as reinforcing).
【０００３】（１）硬化した繊維強化プラスチックを橋
脚等の補強箇所に貼り付ける方法。この方法は補強箇所
に対する補強効率は良好であるが、プラスチックが硬化
しているので湾曲した補強箇所では実用化できないとい
う難点がある。(1) A method in which a cured fiber reinforced plastic is attached to a reinforced portion such as a bridge pier. This method has good reinforcing efficiency for the reinforced portion, but has a drawback that it cannot be put to practical use in a curved reinforced portion because the plastic is hardened.
【０００４】（２）補強箇所にプリプレグを貼付し、そ
の上に加熱硬化時の変形を防止するための押さえテ−プ
を巻回して、加熱硬化することにより繊維強化プラスチ
ックとする方法。この方法は補強箇所に貼付したプリプ
レグを現場で加熱硬化しなければならず、その作業が容
易でない。(2) A method in which a prepreg is attached to a reinforced portion, a pressing tape for preventing deformation during heat curing is wound on the prepreg, and heat cured to obtain a fiber reinforced plastic. In this method, the prepreg attached to the reinforced portion must be heated and hardened on site, and the work is not easy.
【０００５】（３）特開平５−３１８３９号公報や特開
平６−１８２７６６号公報には、支持体上に接着剤層を
介して一方向に配列した強化繊維層を有する強化繊維シ
ートが開示されている。この強化繊維シートは補強箇所
で強化繊維層にマトリックス樹脂を含浸させ、その後支
持体を剥離し、さらにマトリックス樹脂を含浸させて繊
維強化プラスチックとするものである。しかしながら、
この方法では強化繊維層と支持体の間に接着剤層を有す
るので、強化繊維層への接着剤側からのマトリックス樹
脂の含浸が充分に行なえないため、繊維強化プラスチッ
クの補強強度が不足する。また、強化繊維層へのマトリ
ックス樹脂への含浸性が悪いため、現場施工性にも劣
る。(3) JP-A-5-31839 and JP-A-6-182766 disclose a reinforcing fiber sheet having a reinforcing fiber layer arranged in one direction on a support through an adhesive layer. ing. In this reinforcing fiber sheet, the reinforcing fiber layer is impregnated with a matrix resin at a reinforced portion, the support is then peeled off, and the matrix resin is further impregnated to obtain a fiber reinforced plastic. However,
In this method, since the adhesive layer is provided between the reinforcing fiber layer and the support, the matrix resin cannot be sufficiently impregnated into the reinforcing fiber layer from the adhesive side, so that the reinforcing strength of the fiber-reinforced plastic is insufficient. Further, since the impregnating property of the matrix resin into the reinforcing fiber layer is poor, the on-site workability is also poor.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、これら従来
技術の課題を解消し、現場での施工性が良好で、しかも
高い補強強度を有する構造物補強用強化繊維シ−トを提
供することを目的とする。DISCLOSURE OF THE INVENTION The present invention solves these problems of the prior art and provides a reinforcing fiber sheet for structure reinforcement, which has good workability on site and has high reinforcement strength. With the goal.
【０００７】[0007]
【課題を解決するための手段】本発明者は、上記課題を
解決すべく鋭意検討した結果、ホットメルト接着剤で処
理した繊維を強化繊維層の緯糸として用いることによっ
て、強化繊維層の経糸である強化繊維束を集束すると共
に、支持体シートと線接着することを知見して本発明に
到達した。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has found that by using a fiber treated with a hot melt adhesive as a weft of a reinforcing fiber layer, a warp of the reinforcing fiber layer can be obtained. The present invention has been reached by finding that a certain reinforcing fiber bundle is bundled and is linearly bonded to a support sheet.
【０００８】すなわち、本発明は、強化繊維束を経糸と
し、ホットメルト接着剤で処理した繊維を緯糸とした強
化繊維層と支持体シ−トからなり、該支持体シ−トが緯
糸と線接着していることを特徴とする構造物補強用強化
繊維シ−トに関する。That is, according to the present invention, a reinforcing fiber layer is used as a warp, a fiber treated with a hot melt adhesive is used as a weft, and a support sheet is formed. The support sheet is a weft and a line. The present invention relates to a reinforcing fiber sheet for reinforcing a structure, which is characterized by being bonded.
【０００９】[0009]
【発明の実施の形態】以下、本発明について詳述する。
図１（ａ）は本発明の構造物補強用強化繊維シ−ト一例
を示す正面図、同図（ｂ）はその断面図である。同図に
おいて、１は経糸（強化繊維束）、２は緯糸（ホットメ
ルト接着剤で処理した繊維）、３は支持体シートをそれ
ぞれ示す。図１（ａ）に示されるように、強化繊維層は
強化繊維束を経糸とし、ホットメルト接着剤で処理した
繊維を緯糸としている。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
FIG. 1 (a) is a front view showing an example of a reinforcing fiber sheet for reinforcing a structure of the present invention, and FIG. 1 (b) is a sectional view thereof. In the figure, 1 is a warp (reinforcing fiber bundle), 2 is a weft (fiber treated with a hot melt adhesive), and 3 is a support sheet. As shown in FIG. 1 (a), the reinforcing fiber layer has reinforcing fiber bundles as warp yarns and fibers treated with a hot melt adhesive as weft yarns.
【００１０】ここで用いられる強化繊維束を構成する繊
維としては、炭素繊維、ガラス繊維、ポリエチレン繊
維、金属繊維、アラミド繊維等が使用でき、特に、軽
量、高引張強度であり、コンクリ−ト等のアルカリに強
いピッチ系炭素繊維、ＰＡＮ系炭素繊維を使用するのが
好ましい。この経糸である強化繊維束の間隔は０〜１０
０ｍｍ、好ましくは０〜１０ｍｍであり、撚り、解撚り
を加えてもよく、また無撚りでもよく、２種以上の繊維
を組み合わせたハイブリット繊維を用いてもよい。撚り
数は通常０．１〜２０回／ｍである。また強化繊維束と
して開繊繊維も使用できる。強化繊維径は通常４〜２０
μｍ、好ましくは６〜１５μｍであり、１００〜１０
０，０００本、好ましくは１，０００〜３０，０００本
の強化繊維を束ねて経糸とする。この強化繊維は一方向
に配列した強化繊維束が特に好ましく、集束剤を用いて
強化繊維束を集束させてもよい。Carbon fibers, glass fibers, polyethylene fibers, metal fibers, aramid fibers and the like can be used as the fibers constituting the reinforcing fiber bundle used here, and in particular, they are lightweight and have high tensile strength, and concrete and the like. It is preferable to use pitch-based carbon fibers and PAN-based carbon fibers that are resistant to alkali. The space between the reinforcing fiber bundles that are the warp is 0 to 10.
It is 0 mm, preferably 0 to 10 mm, and may be twisted and untwisted, or may be untwisted, and hybrid fibers in which two or more kinds of fibers are combined may be used. The number of twists is usually 0.1 to 20 times / m. Further, opened fibers can also be used as the reinforcing fiber bundle. Reinforcing fiber diameter is usually 4 to 20
μm, preferably 6 to 15 μm, 100 to 10
10,000, preferably 1,000 to 30,000, reinforcing fibers are bundled into a warp. This reinforcing fiber is particularly preferably a reinforcing fiber bundle arranged in one direction, and a reinforcing agent may be used to bundle the reinforcing fiber bundle.
【００１１】緯糸であるホットメルト接着剤で処理した
繊維は、繊維にホットメルト接着剤を付着、塗布、含
浸、被覆することによって得られる。また、ホットメル
ト糸と他の繊維の混繊糸を用いてもよい。ホットメルト
接着剤は８０〜９０℃で溶融するものが好ましく用いら
れる。ここに用いられる繊維としては炭素繊維、ガラス
繊維、アラミド繊維等が挙げられるが、特にガラス繊維
が好ましく用いられる。この緯糸に２種以上の繊維を組
み合わせたハイブリッド繊維を用いてもよい。これら緯
糸は繊維直径が４〜３０μｍ、好ましくは６〜１７μｍ
のものを１〜１，０００本、好ましくは１〜１０本撚り
合わせて直径４〜５００μｍ、好ましくは６〜５０μｍ
の繊維束の状態で用いることができる。緯糸間隔は支持
体シ−トと安定に接着し、かつ容易にマトリックス樹脂
が含浸できるような間隔であればよく、好ましくは１〜
２００ｍｍ、さらに好ましくは３〜５０ｍｍである。緯
糸間隔が前記範囲未満であるとマトリックス樹脂の含浸
性が低下してしまい十分な補強効果が得られない。ま
た、前記範囲を超える場合は一方向材の拘束性が低下し
て施工時の作業性が低下してしまう。The fiber treated with the hot melt adhesive, which is a weft, is obtained by attaching, coating, impregnating or coating the fiber with the hot melt adhesive. Further, a mixed yarn of hot melt yarn and other fibers may be used. A hot melt adhesive that melts at 80 to 90 ° C. is preferably used. Examples of the fiber used here include carbon fiber, glass fiber, aramid fiber and the like, but glass fiber is particularly preferably used. You may use the hybrid fiber which combined two or more types of fibers with this weft. These wefts have a fiber diameter of 4 to 30 μm, preferably 6 to 17 μm.
1 to 1,000 pieces, preferably 1 to 10 pieces are twisted together to have a diameter of 4 to 500 μm, preferably 6 to 50 μm
It can be used in the state of a fiber bundle. The weft spacing may be such that it can be stably adhered to the support sheet and can be easily impregnated with the matrix resin, preferably 1 to
It is 200 mm, more preferably 3 to 50 mm. If the weft spacing is less than the above range, the impregnating property of the matrix resin will be reduced and a sufficient reinforcing effect cannot be obtained. On the other hand, if it exceeds the above range, the restraint property of the unidirectional material is deteriorated and the workability during construction is deteriorated.
【００１２】この経糸と緯糸から強化繊維層を形成する
には前記のような一方向材が特に好ましく用いられるが
平織り、綾織り、朱子織り等により経糸と緯糸を織り込
んで織布としても経糸と緯糸を井型状に積層しただけの
組布としてもよい。この組布においては２軸以外に３軸
組布でもよい。前記一方向材、織布あるいは組布の目付
け量は、１００〜５００ｇ／ｍ2（厚さ５５〜２９０μ
ｍ）、好ましくは１５０〜３００ｇ／ｍ2（厚さ８３〜
１７５μｍ）のものが用いられる。The unidirectional material as described above is particularly preferably used to form the reinforcing fiber layer from the warp and the weft, but the warp and the weft are woven by plain weave, twill weave, satin weave, etc. It is also possible to make a braid simply by laminating wefts in a well shape. This braid may be triaxial braid instead of biaxial braid. The weight of the unidirectional material, woven fabric or braid is 100 to 500 g / m 2 (thickness 55 to 290 μm
m), preferably 150-300 g / m 2 (thickness 83-
175 μm) is used.
【００１３】支持体シ−トは強化繊維と線接着可能なも
のであればどんなものでもよく、例えば、抄紙、ポリア
ミド、ポリエステル、ポリエチレン、ポリプロピレン等
からなる樹脂フィルムが挙げられ、剛性が良好なクラフ
ト紙が好ましく用いられる。支持体シートの目付け量は
２０〜２００ｇ／ｍ2、好ましくは８０〜１１０ｇ／ｍ2
であり、該範囲未満では支持体シートの剛性、特に緯糸
方向の剛性が不足し施工時の作業性が低下し、該範囲を
超える場合は重量が必要以上に増加し作業性が低下す
る。The support sheet may be of any type as long as it can be line-bonded to the reinforcing fibers, and examples thereof include a paper film, a resin film made of polyamide, polyester, polyethylene, polypropylene and the like. Paper is preferably used. The basis weight of the support sheet is 20 to 200 g / m 2 , preferably 80 to 110 g / m 2.
When the amount is less than the range, the rigidity of the support sheet, particularly the rigidity in the weft direction is insufficient and the workability at the time of construction is deteriorated. When the amount exceeds the range, the weight is increased more than necessary and the workability is deteriorated.
【００１４】次に、本発明の構造物補強用強化繊維シー
トの構造物への適用について説明する。図２は本発明の
構造物補強用強化繊維シートを構造物に適用する説明図
であり、図１と同一の符号は同様のものを示し、４はマ
トリックス樹脂、５は構造物、６はひび割れをそれぞれ
示す。Next, application of the reinforcing fiber sheet for reinforcing a structure of the present invention to a structure will be described. FIG. 2 is an explanatory view of applying the reinforcing fiber sheet for structure reinforcement of the present invention to a structure, the same reference numerals as those in FIG. 1 indicate the same things, 4 is a matrix resin, 5 is a structure, and 6 is a crack. Are shown respectively.
【００１５】先ず、コンクリート構造物等の構造物５の
ひび割れ６を有する補強部分にプライマ−を薄く塗布し
て、構造物表面とマトリックス樹脂が接着しやすいよう
にし、次いでマトリックス樹脂４を塗布する。ここで用
いられるプライマ−としては、マトリックス樹脂と同種
のものが好ましく、例えば常温硬化性低粘度液状エポキ
シ樹脂が使用できる。また、マトリックス樹脂は熱硬化
性樹脂、熱可塑性樹脂のどちらでもよく、例えば、熱硬
化性樹脂としてエポキシ樹脂、不飽和エポキシ樹脂、ビ
ニルエステル樹脂等が挙げられ、好ましくは常温硬化性
樹脂が使用される。First, a primer is thinly applied to a reinforcing portion having a crack 6 of a structure 5 such as a concrete structure so that the surface of the structure is easily adhered to the matrix resin, and then the matrix resin 4 is applied. The primer used here is preferably the same type as the matrix resin, for example, a room temperature curable low-viscosity liquid epoxy resin can be used. The matrix resin may be either a thermosetting resin or a thermoplastic resin, and examples of the thermosetting resin include epoxy resin, unsaturated epoxy resin, vinyl ester resin and the like, and preferably room temperature curable resin is used. It
【００１６】次に、図２（ａ）に示されるように、マト
リックス樹脂４上に強化繊維層と支持体シート３からな
る構造物補強用強化繊維シ−トを積層する。そして、図
２（ｂ）に示されるように支持体シ−ト３を剥離して最
後にもう一度強化繊維層上に、上記と同種のマトリック
ス樹脂４を塗布し、強化繊維層中にマトリックス樹脂を
充分に含浸させる。Next, as shown in FIG. 2 (a), a reinforcing fiber sheet for reinforcing a structure comprising a reinforcing fiber layer and a support sheet 3 is laminated on the matrix resin 4. Then, as shown in FIG. 2B, the support sheet 3 is peeled off, and finally the same matrix resin 4 of the same kind as described above is applied onto the reinforcing fiber layer, and the matrix resin is added to the reinforcing fiber layer. Thoroughly impregnate.
【００１７】このようにマトリックス樹脂を含浸した構
造物補強用強化繊維シ−トを複数層積層してもよい。強
化繊維シ−トの積層数としては１〜１０、好ましくは１
〜６である。強化繊維束のひび割れに対する配向方向は
一方向だけでなく、０°、±４５°、９０°等の補強し
たい方向に配向させることができる。As described above, a plurality of reinforcing fiber sheets for reinforcing a structure impregnated with a matrix resin may be laminated. The number of laminated reinforcing fiber sheets is 1 to 10, preferably 1
~ 6. The orientation direction of the reinforcing fiber bundle with respect to cracking is not limited to one direction, but can be oriented in a direction to be reinforced such as 0 °, ± 45 °, 90 °.
【００１８】次に、本発明の構造物補強用強化繊維シ−
トの製造方法について図面に基づいて説明する。図３は
本発明の構造物補強用強化繊維シ−トの製造工程図であ
り、図４は他の工程図である。図３〜４において、７は
織物繰り出しロール、８は支持体送り出しロール、９は
予熱ロール、１０はニップロール、１１は冷却ロール、
１２は巻取りロール、１３はクリールスタンド、１４は
織り機をそれぞれ示す。Next, a reinforcing fiber sheet for reinforcing the structure of the present invention.
A method of manufacturing the sheet will be described with reference to the drawings. FIG. 3 is a process drawing of the reinforcing fiber sheet for reinforcing a structure of the present invention, and FIG. 4 is another process drawing. 3 to 4, 7 is a fabric feeding roll, 8 is a support feeding roll, 9 is a preheating roll, 10 is a nip roll, 11 is a cooling roll,
12 is a winding roll, 13 is a creel stand, and 14 is a weaving machine.
【００１９】図３において、１種または２種以上の強化
繊維束からなる経糸を適当な間隔で配列し、ホットメル
ト接着剤で処理した繊維からなる緯糸を適当な間隔で前
記経糸へ織り込んだ強化繊維層を織物繰り出しロール７
から繰り出すと共に、支持体シ−トを支持体送り出しロ
ール７から送り出し両者積層する。この積層物を予熱ロ
ール９で予熱した後、加熱したニップロール１０によっ
てホットメルト接着剤を溶融させ、強化繊維層の経糸で
ある強化繊維束を集束すると共に、緯糸は支持体シート
と線接着する。このようにして得られた構造体補強用繊
維シートは冷却ロール１１で冷却された後、巻取りロー
ルによって巻取られる。In FIG. 3, warp yarns composed of one or more kinds of reinforcing fiber bundles are arranged at appropriate intervals, and weft yarns made of fibers treated with a hot melt adhesive are woven into the warp yarns at appropriate intervals. The fiber layer is the fabric feeding roll 7
The support sheet is sent out from the support delivery roll 7 and both are laminated. After preheating this laminate by the preheating roll 9, the hot melt adhesive is melted by the heated nip roll 10 to focus the reinforcing fiber bundle which is the warp yarn of the reinforcing fiber layer, and the weft yarn is line-bonded to the support sheet. The structure-reinforcing fiber sheet thus obtained is cooled by the cooling roll 11 and then wound by the winding roll.
【００２０】図４においては、クリールスタンド１２か
ら繰り出された強化繊維束からなる経糸はホットメルト
接着剤で処理した繊維からなる緯糸と織り機１３におい
て織成される。その後は図３と同様にして構造体補強用
繊維シートが得られる。In FIG. 4, the warp yarn consisting of the reinforcing fiber bundle fed from the creel stand 12 is woven in the weaving machine 13 with the weft yarn consisting of the fiber treated with the hot melt adhesive. After that, a structure-reinforcing fiber sheet is obtained in the same manner as in FIG.
【００２１】[0021]
【実施例】以下、実施例に基づいて本発明を具体的に説
明する。EXAMPLES The present invention will be specifically described below based on examples.
【００２２】実施例１ 図３に従って構造物補強用強化繊維シ−トを製造した。
すなわち、ピッチ系炭素繊維（商品名：ＸＮ４０、日本
石油株式会社製）１２，０００本を束ねて経糸とし、こ
の経糸に５回／ｍの軽い撚りを加えて隙間なく配列し
た。次に、融点８０℃のホットメルト繊維とガラス繊維
の混繊糸を緯糸として、緯糸間隔１０ｍｍで経糸に織り
込み、目付け量２００ｇ／ｍ2の炭素繊維一方向材とし
た。 Example 1 A reinforcing fiber sheet for reinforcing a structure was manufactured according to FIG.
That is, 12,000 pitch-based carbon fibers (trade name: XN40, manufactured by Nippon Oil Co., Ltd.) were bundled into a warp, and a light twist of 5 times / m was added to the warp so that the warp was arranged without a gap. Next, a mixed yarn of hot melt fiber and glass fiber having a melting point of 80 ° C. was used as a weft and woven into a warp with a weft spacing of 10 mm to obtain a carbon fiber unidirectional material having a basis weight of 200 g / m 2 .
【００２３】この炭素繊維一方向材を供給ロールから織
物繰り出し機により繰り出し、目付け量１００ｇ／ｍ2
のクラフト紙を積層してガイドロ−ルに通した。この積
層物を１２０℃に加熱した予熱ロ−ル上を通過させ、さ
らに１２０℃に加熱した圧力２ｋｇｆ／ｃｍ2のニップ
ロ−ル間に通した後、２０℃の冷却ロ−ル上を通して巻
取り機で巻き取り、構造物補強用強化繊維シ−トを得
た。This carbon fiber unidirectional material was fed from a supply roll by a woven fabric feeding machine, and the basis weight was 100 g / m 2.
The above kraft papers were laminated and passed through a guide roll. This laminate was passed through a preheating roll heated to 120 ° C., further passed between nipple rolls heated to 120 ° C. and having a pressure of 2 kgf / cm 2 , and then wound on a cooling roll at 20 ° C. It was wound by a machine to obtain a reinforcing fiber sheet for reinforcing a structure.
【００２４】次いで、得られた構造物補強用強化繊維シ
−トを実際に構造物に適用した。１００ｍｍ×１００ｍ
ｍ×４００ｍｍのコンクリ−ト製ブロック表面中央部
に、幅１ｍｍ、長さ２５ｍｍのスリットを入れて、さら
にプライマ−として常温硬化性低粘度液状エポキシ樹脂
を薄く塗布して、ブロック表面とマトリックス樹脂とが
接着しやすいようにした。Then, the obtained reinforcing fiber sheet for structure reinforcement was actually applied to the structure. 100 mm x 100 m
A slit with a width of 1 mm and a length of 25 mm was placed in the center of the surface of a concrete block of m × 400 mm, and a room temperature curable low viscosity liquid epoxy resin was thinly applied as a primer to form a block surface and a matrix resin. Made it easier to bond.
【００２５】この表面上にマトリックス樹脂として常温
硬化性エポキシ樹脂を塗布し、その上にスリット方向と
炭素繊維の配向方向が直角になるように構造物補強用強
化繊維シートを積層した後クラフト紙を除去し、このシ
−ト上に前記と同様の常温硬化性エポキシ樹脂を塗布し
て２４時間放置し、炭素繊維含有量４７ｗｔ％の繊維強
化複合材シ−トを得た。得られたシ−トはブロックと強
固に接着しており、曲げ試験を行ってもブロックが破断
するまで剥離しなかった。A room temperature curable epoxy resin is applied as a matrix resin on this surface, and a reinforcing fiber sheet for structure reinforcement is laminated thereon so that the slit direction and the orientation direction of the carbon fibers are perpendicular to each other, and then kraft paper is prepared. The sheet was removed, and the same room temperature curable epoxy resin as described above was applied onto this sheet and left for 24 hours to obtain a fiber reinforced composite material sheet having a carbon fiber content of 47 wt%. The obtained sheet was firmly adhered to the block and did not peel off until the block broke even when a bending test was performed.
【００２６】この繊維強化複合材シ−トの断面を走査型
電子顕微鏡で観察したところ、１〜２ｍｍの気泡の存在
は確認されたが、５ｍｍ以上の気泡は観察されなかっ
た。また、構造物補強用強化繊維シ−トに別途マトリッ
クス樹脂を含浸して得られた炭素繊維含有量４８ｗｔ％
の繊維強化複合材シ−トの引張破断強度は４１９ｋｇｆ
／ｍｍ2であった。When the cross section of this fiber-reinforced composite sheet was observed with a scanning electron microscope, the presence of bubbles of 1 to 2 mm was confirmed, but no bubbles of 5 mm or more were observed. Further, the carbon fiber content obtained by separately impregnating the reinforcing fiber sheet for structure reinforcement with the matrix resin is 48 wt%.
Tensile breaking strength of the fiber-reinforced composite sheet of 419 kgf
/ Mm 2 .
【００２７】実施例２ 図４に従って構造物補強用強化繊維シ−トを製造した。
すなわち、ピッチ系炭素繊維（商品名：ＸＮ４０、日本
石油株式会社製）１２，０００本を束ねて経糸とし、こ
の経糸に５回／ｍの軽い撚りを加えてクリ−ルスタンド
から隙間なく配列した。次に、融点８０℃のホットメル
ト繊維とガラス繊維の混繊糸を緯糸として、緯糸間隔１
０ｍｍで織り機によって経糸に織り込み、目付け量２０
０ｇ／ｍ2の炭素繊維一方向材とした。 Example 2 A reinforcing fiber sheet for reinforcing a structure was manufactured according to FIG.
That is, 12,000 pitch-based carbon fibers (trade name: XN40, manufactured by Nippon Oil Co., Ltd.) were bundled into a warp, and a light twist of 5 times / m was added to the warp and the warps were arranged from the crease stand without gaps. . Next, using a mixed yarn of hot melt fiber and glass fiber having a melting point of 80 ° C. as a weft, weft spacing 1
Weave the warp with a weaving machine at 0 mm, and have a basis weight of 20.
A unidirectional carbon fiber of 0 g / m 2 was used.
【００２８】この炭素繊維一方向材を供給ロールから織
物繰り出し機で繰り出し、目付け量１００ｇ／ｍ2のク
ラフト紙を積層してガイドロ−ルに通した。この積層物
を１２０℃に加熱した予熱ロ−ル上を通過させ、さらに
１２０℃に加熱した圧力２ｋｇｆ／ｃｍ2のニップロ−
ル間に通した後、２０℃の冷却ロ−ル上を通して巻取り
機で巻き取り、構造物補強用強化繊維シ−トを得た。This unidirectional carbon fiber material was fed from a supply roll by a woven fabric feeding machine, kraft paper having a basis weight of 100 g / m 2 was laminated and passed through a guide roll. This laminate was passed through a preheating roll heated to 120 ° C., and further heated to 120 ° C. under a pressure of 2 kgf / cm 2 nipple.
After passing between the rolls, it was passed through a cooling roll at 20 ° C. and wound up by a winder to obtain a reinforcing fiber sheet for structure reinforcement.
【００２９】次いで、得られた構造物補強用強化繊維シ
−トを実際に構造物に使用した。１００ｍｍ×１００ｍ
ｍ×４００ｍｍのコンクリ−ト製ブロック表面中央部
に、幅１ｍｍ、長さ２５ｍｍのスリットを入れて、さら
にプライマ−として常温硬化性低粘度液状エポキシ樹脂
を薄く塗布して、ブロック表面とマトリックス樹脂とが
接着しやすいようにした。Next, the obtained reinforcing fiber sheet for structure reinforcement was actually used for a structure. 100 mm x 100 m
A slit with a width of 1 mm and a length of 25 mm was placed in the center of the surface of a concrete block of m × 400 mm, and a room temperature curable low viscosity liquid epoxy resin was thinly applied as a primer to form a block surface and a matrix resin. Made it easier to bond.
【００３０】この表面上にマトリックス樹脂として常温
硬化性エポキシ樹脂を塗布し、その上にスリット方向と
炭素繊維の配向方向が直角になるように構造物補強用強
化繊維シートを積層した後クラフト紙を除去し、このシ
−ト上に前記と同様の常温硬化性エポキシ樹脂を塗布し
て２４時間放置し、炭素繊維含有量４７ｗｔ％の繊維強
化複合材シ−トを得た。得られたシ−トはブロックと強
固に接着しており、曲げ試験を行ってもブロックが破断
するまで剥離しなかった。A room temperature curable epoxy resin is applied as a matrix resin on this surface, and a reinforcing fiber sheet for structure reinforcement is laminated thereon so that the slit direction and the orientation direction of the carbon fibers are perpendicular to each other, and then kraft paper is prepared. The sheet was removed, and the same room temperature curable epoxy resin as described above was applied onto this sheet and left for 24 hours to obtain a fiber reinforced composite material sheet having a carbon fiber content of 47 wt%. The obtained sheet was firmly adhered to the block and did not peel off until the block broke even when a bending test was performed.
【００３１】この繊維強化複合材シ−トの断面を走査型
電子顕微鏡で観察したところ、１〜２ｍｍの気泡の存在
は確認されたが、５ｍｍ以上の気泡は観察されなかっ
た。また、構造物補強用強化繊維シ−トに別途マトリッ
クス樹脂を含浸して得られた炭素繊維含有量４７ｗｔ％
の繊維強化複合材シ−トの引張破断強度は、４２０ｋｇ
ｆ／ｍｍ2であった。When the cross section of this fiber-reinforced composite sheet was observed with a scanning electron microscope, the presence of bubbles of 1 to 2 mm was confirmed, but no bubbles of 5 mm or more were observed. Further, the carbon fiber content obtained by separately impregnating a reinforcing resin sheet for structure reinforcement with a matrix resin is 47% by weight.
The tensile strength at break of the fiber-reinforced composite sheet of 420 kg is 420 kg.
It was f / mm 2 .
【００３２】比較例１ ピッチ系炭素繊維（商品名：ＸＮ４０、日本石油株式会
社製）１２，０００本を束ねて経糸として、この経糸に
５回／ｍの軽い撚りを加えて隙間なく配列した。次に、
融点８０℃のホットメルト繊維とガラス繊維の混繊糸を
緯糸として、緯糸間隔１０ｍｍで経糸に織り込み、目付
け量２００ｇ／ｍ2の炭素繊維一方向材とした。 Comparative Example 1 12,000 pitch-based carbon fibers (trade name: XN40, manufactured by Nippon Oil Co., Ltd.) were bundled into a warp, and the warp was lightly twisted 5 times / m and arranged without gaps. next,
A mixed fiber of hot melt fiber and glass fiber having a melting point of 80 ° C. was used as a weft and woven into a warp at a weft spacing of 10 mm to obtain a carbon fiber unidirectional material having a basis weight of 200 g / m 2 .
【００３３】この炭素繊維一方向材を供給ロールから織
物繰り出し機で繰り出して、さらにエポキシ樹脂系の接
着剤を均一に塗布した離型紙を積層してガイドロ−ルに
通した。この積層物を９０℃に加熱した予熱ロ−ル上を
通過させ、さらに９０℃に加熱した圧力２ｋｇｆ／ｃｍ
2のニップロ−ル間に通した後、２０℃の冷却ロ−ル上
を通して巻き取り、構造物補強用強化繊維シ−トを得
た。The carbon fiber unidirectional material was fed from a supply roll by a woven fabric feeding machine, and release paper on which an epoxy resin adhesive was uniformly applied was laminated and passed through a guide roll. This laminate was passed through a preheating roll heated to 90 ° C, and further heated to 90 ° C under a pressure of 2 kgf / cm.
After passing between the two nip rolls, it was passed through a cooling roll at 20 ° C. and wound up to obtain a reinforcing fiber sheet for structure reinforcement.
【００３４】次いで、得られた構造物補強用強化繊維シ
−トを実際に構造物に使用した。１００ｍｍ×１００ｍ
ｍ×４００ｍｍのコンクリ−ト製ブロック表面中央部
に、幅１ｍｍ、長さ２５ｍｍのスリットを入れ、さらに
プライマ−として常温硬化性低粘度液状エポキシ樹脂を
薄く塗布して、ブロック表面とマトリックス樹脂とが接
着しやすいようにした。Next, the obtained reinforcing fiber sheet for structure reinforcement was actually used for a structure. 100 mm x 100 m
A slit with a width of 1 mm and a length of 25 mm is placed in the center of the surface of a concrete block of m × 400 mm, and a room temperature curable low-viscosity liquid epoxy resin is thinly applied as a primer to form a block surface and a matrix resin. I made it easy to bond.
【００３５】この表面上にマトリックス樹脂として常温
硬化性エポキシ樹脂を塗布し、その上にスリット方向と
炭素繊維の配向方向が直角になるように構造物補強用強
化繊維シートを積層した後離型紙を除去し、その上に前
記と同様の常温硬化性エポキシ樹脂を塗布して２４時間
放置し、炭素繊維含有量５２ｗｔ％の繊維強化複合材シ
−トを得た。この繊維強化複合材シ−トの断面を走査型
電子顕微鏡で観察したところ、５ｍｍ以上の気泡が多数
観察された。A room temperature curable epoxy resin is applied as a matrix resin on this surface, and a reinforcing fiber sheet for structure reinforcement is laminated on the surface of the release resin so that the slit direction and the orientation direction of the carbon fibers are perpendicular to each other, and then a release paper is formed. After removal, the same room temperature curable epoxy resin as described above was applied and left for 24 hours to obtain a fiber reinforced composite material sheet having a carbon fiber content of 52 wt%. When a cross section of this fiber-reinforced composite sheet was observed with a scanning electron microscope, many bubbles of 5 mm or more were observed.
【００３６】また、構造物補強用強化繊維シ−トに別途
マトリックス樹脂を含浸して得られた炭素繊維含有量５
１ｗｔ％の繊維強化複合材シ−トの引張破断強度は３８
０ｋｇｆ／ｍｍ2であった。A carbon fiber content of 5 obtained by separately impregnating a reinforcing resin sheet for structure reinforcement with a matrix resin.
The tensile breaking strength of a 1 wt% fiber-reinforced composite sheet is 38.
It was 0 kgf / mm 2 .
【００３７】[0037]
【発明の効果】以上説明したように、本発明の構造物補
強用強化繊維シ−トを使用すれば、強化繊維層へのマト
リックス樹脂の含浸性が良好なことから、構造物に対す
る高い補強強度が得られる。また、支持体シ−トがある
ため作業性が良好で、加熱溶融されたホツトメルト接着
剤が強化繊維に絡み、冷却されて強化繊維を拘束するた
め毛羽立ちも防止できる。さらに、複数層積層して補強
する際には、強化繊維層へのマトリックス樹脂の含浸性
が良好なため現場での施工時間を短縮できる。As described above, when the reinforcing fiber sheet for structure reinforcement of the present invention is used, the impregnating property of the matrix resin into the reinforcing fiber layer is good, and therefore, the high reinforcing strength for the structure is obtained. Is obtained. Further, since the support sheet is provided, workability is good, and the hot-melt adhesive melted by heating is entangled with the reinforcing fibers and cooled to restrain the reinforcing fibers, so that fuzzing can be prevented. Furthermore, when laminating a plurality of layers for reinforcement, the impregnating property of the matrix resin into the reinforcing fiber layer is good, so that the construction time at the site can be shortened.
【図１】 本発明の構造物補強用強化繊維シ−トの一例
を示す正面図および断面図。FIG. 1 is a front view and a sectional view showing an example of a reinforcing fiber sheet for reinforcing a structure of the present invention.
【図２】 本発明の構造物補強用強化繊維シートを構造
物に適用する説明図。FIG. 2 is an explanatory view of applying the reinforcing fiber sheet for structure reinforcement of the present invention to a structure.
【図３】 本発明の構造物補強用強化繊維シ−トの製造
工程図。FIG. 3 is a manufacturing process diagram of a reinforcing fiber sheet for structure reinforcement of the present invention.
【図４】 本発明の構造物補強用強化繊維シ−トの他の
製造工程図。FIG. 4 is another manufacturing process drawing of the reinforcing fiber sheet for structure reinforcement of the present invention.
１：経糸（強化繊維束）、２：緯糸（ホットメルト接着
剤で処理した繊維）、３：支持体シート、４：マトリッ
クス樹脂、５：構造物、６：ひび割れ、７：織物繰り出
しロール、８：支持体送り出しロール、９：予熱ロー
ル、１０：ニップロール、１１：冷却ロール、１２：巻
取りロール、１３：クリールスタンド、１４：織り機。1: Warp (reinforced fiber bundle) 2: Weft (fiber treated with a hot melt adhesive) 3: Support sheet 4: Matrix resin 5: Structure 6: Cracking 7: Woven feeding roll 8 : Support feeding roll, 9: Preheating roll, 10: Nip roll, 11: Cooling roll, 12: Winding roll, 13: Creel stand, 14: Loom.
Claims (2)
着剤で処理した繊維を緯糸とした強化繊維層と支持体シ
−トからなり、該支持体シ−トが緯糸と線接着している
ことを特徴とする構造物補強用強化繊維シ−ト。1. A reinforcing fiber layer comprising a reinforcing fiber bundle as a warp and a fiber treated with a hot melt adhesive as a weft, and a support sheet, and the support sheet is line-bonded to the weft. A reinforcing fiber sheet for reinforcing a structure, which is characterized in that
強化繊維シート間にマトリックス樹脂を介在させた後、
支持体シートを剥離し、該強化繊維シート上にさらにマ
トリックス樹脂を積層することを特徴とする構造物の補
強方法。2. After interposing a matrix resin between the structure and the reinforcing fiber sheet for structure reinforcement according to claim 1,
A method for reinforcing a structure, which comprises peeling a support sheet and further laminating a matrix resin on the reinforcing fiber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24230995A JP3405497B2 (en) | 1995-08-29 | 1995-08-29 | Reinforced fiber sheet for structural reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24230995A JP3405497B2 (en) | 1995-08-29 | 1995-08-29 | Reinforced fiber sheet for structural reinforcement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0957882A true JPH0957882A (en) | 1997-03-04 |
| JP3405497B2 JP3405497B2 (en) | 2003-05-12 |
Family
ID=17087307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24230995A Expired - Lifetime JP3405497B2 (en) | 1995-08-29 | 1995-08-29 | Reinforced fiber sheet for structural reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3405497B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006130698A (en) * | 2004-11-02 | 2006-05-25 | Maruhachi Kk | Multi-axial laminated reinforcing fiber sheet, its manufacturing method and long inclined reinforcing fiber sheet |
| JP2008255549A (en) * | 2007-03-15 | 2008-10-23 | Nippon Electric Glass Co Ltd | Mesh woven fabric and composite structure for building |
| WO2011002762A2 (en) * | 2009-07-01 | 2011-01-06 | Fortress Stabilization Systems | Carbon reinforced concrete |
| JP2011121372A (en) * | 2011-01-24 | 2011-06-23 | Maruhachi Kk | Multi-shaft laminate reinforced fiber sheet manufacturing method, long inclination reinforced fiber sheet, and multi-shaft laminate reinforced fiber sheet |
| US8142102B2 (en) | 2006-05-26 | 2012-03-27 | Fortress Stabilization Systems | Road surface overlay system |
| JP2017206306A (en) * | 2016-05-17 | 2017-11-24 | ハングク カーボン カンパニー リミテッド | Secondary gas barrier for liquefied gas storage tank having flexibility and fatigue resistance performance improved by material change of reinforcing material |
| US10808340B2 (en) | 2007-09-20 | 2020-10-20 | Fortress Stabilization Systems | Woven fiber reinforcement material |
-
1995
- 1995-08-29 JP JP24230995A patent/JP3405497B2/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006130698A (en) * | 2004-11-02 | 2006-05-25 | Maruhachi Kk | Multi-axial laminated reinforcing fiber sheet, its manufacturing method and long inclined reinforcing fiber sheet |
| US8142102B2 (en) | 2006-05-26 | 2012-03-27 | Fortress Stabilization Systems | Road surface overlay system |
| US8367569B2 (en) | 2006-05-26 | 2013-02-05 | Fortress Stabilization Systems | Carbon reinforced concrete |
| US9034775B2 (en) | 2006-05-26 | 2015-05-19 | Fortress Stabilization Systems | Carbon reinforced concrete |
| JP2008255549A (en) * | 2007-03-15 | 2008-10-23 | Nippon Electric Glass Co Ltd | Mesh woven fabric and composite structure for building |
| US10808340B2 (en) | 2007-09-20 | 2020-10-20 | Fortress Stabilization Systems | Woven fiber reinforcement material |
| WO2011002762A2 (en) * | 2009-07-01 | 2011-01-06 | Fortress Stabilization Systems | Carbon reinforced concrete |
| WO2011002762A3 (en) * | 2009-07-01 | 2011-04-28 | Fortress Stabilization Systems | Carbon reinforced concrete |
| JP2011121372A (en) * | 2011-01-24 | 2011-06-23 | Maruhachi Kk | Multi-shaft laminate reinforced fiber sheet manufacturing method, long inclination reinforced fiber sheet, and multi-shaft laminate reinforced fiber sheet |
| JP2017206306A (en) * | 2016-05-17 | 2017-11-24 | ハングク カーボン カンパニー リミテッド | Secondary gas barrier for liquefied gas storage tank having flexibility and fatigue resistance performance improved by material change of reinforcing material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3405497B2 (en) | 2003-05-12 |
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