JPH0734677A - Prepreg for structure reinforcement and reinforcement method using the same - Google Patents
Prepreg for structure reinforcement and reinforcement method using the sameInfo
- Publication number
- JPH0734677A JPH0734677A JP17687093A JP17687093A JPH0734677A JP H0734677 A JPH0734677 A JP H0734677A JP 17687093 A JP17687093 A JP 17687093A JP 17687093 A JP17687093 A JP 17687093A JP H0734677 A JPH0734677 A JP H0734677A
- Authority
- JP
- Japan
- Prior art keywords
- prepreg
- resin
- reinforcing
- reinforcement
- weight
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000002787 reinforcement Effects 0.000 title abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 48
- 239000011347 resin Substances 0.000 claims abstract description 48
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 26
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 22
- 239000004917 carbon fiber Substances 0.000 claims abstract description 22
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 description 11
- 229920000647 polyepoxide Polymers 0.000 description 11
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- 239000000835 fiber Substances 0.000 description 9
- 239000011521 glass Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XQUPVDVFXZDTLT-UHFFFAOYSA-N 1-[4-[[4-(2,5-dioxopyrrol-1-yl)phenyl]methyl]phenyl]pyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C(C=C1)=CC=C1CC1=CC=C(N2C(C=CC2=O)=O)C=C1 XQUPVDVFXZDTLT-UHFFFAOYSA-N 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003192 poly(bis maleimide) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- -1 thinner Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
Landscapes
- Working Measures On Existing Buildindgs (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
(57)【要約】
【目的】 加熱装置を使用せず、かつ補強後の外観が美
しく、何枚ものプリプレグを重張りしなくても高強度の
補強ができ、保存性に優れ、夏期になっても特別な保存
を行わずにすむ補強用プリプレグとそれを用いた補強方
法を提供すること。
【構成】 補強用繊維が炭素繊維であり、樹脂含有量が
１５重量％以下かつＦＡＷ（１ｍ2 当たりの使用する炭
素繊維の重さ）が２００ｇ／ｍ2 以上である構造物補強
用プリプレグ。(57) [Summary] [Purpose] The appearance after reinforcement is beautiful without using a heating device, and high-strength reinforcement is possible without the need to overload many prepregs. To provide a prepreg for reinforcement that does not require special preservation and a reinforcement method using the prepreg. [Structure] A reinforcing prepreg in which the reinforcing fiber is carbon fiber, the resin content is 15% by weight or less, and the FAW (weight of carbon fiber used per 1 m 2 ) is 200 g / m 2 or more.
Description
【０００１】[0001]
【発明の利用分野】本発明は補強用プリプレグ及びそれ
を用いた補強方法に関する。TECHNICAL FIELD The present invention relates to a reinforcing prepreg and a reinforcing method using the same.
【０００２】[0002]
【従来の技術】近年プリプレグを用いた建築物等の構造
物の補強方法が、実用化され始めている。プリプレグと
しては、通常樹脂の量が３５重量％程度のものが使用さ
れ、樹脂量を少なくしても最低３０％のものが使用され
ていた。これは樹脂の量が３０％未満になると、硬化後
に空隙（ボイド）等が発生しやすく、良好な成形物が得
らにくくなりやすいためである。又ＦＡＷ（１ｍ2 当た
りに使用する炭素繊維の重さ）としては、１００〜１７
５ｇ／ｍ2 の範囲のものが用いられている。これは１０
０ｇ／ｍ2 未満のものを使用すると炭素繊維の量が少な
すぎて補強効果が十分でなくなりやすく、所望の強度を
得るために多数のプリプレグを使用することになり、結
局手間がかかり作業性が悪化しやすい。また１７５ｇ／
ｍ2 を越えるものを使用するとプリプレグが固くしなや
かさに欠けるものとなり、補強すべき構造物の形状に追
随しにくくなったりするためである。そしてこのような
プリプレグを用いた補強方法は、通常、補強面の傷を埋
めたり、削ったりする断面修正処理を行った後、プライ
マー層を塗り、プリプレグを貼付し、これを熱硬化させ
る方法が行われている。2. Description of the Related Art In recent years, a method of reinforcing a structure such as a building using a prepreg has been put into practical use. As the prepreg, a resin having a resin amount of about 35% by weight was usually used, and a resin having a minimum resin amount of 30% was used. This is because when the amount of the resin is less than 30%, voids or the like are likely to occur after curing, and it becomes difficult to obtain a good molded product. FAW (weight of carbon fiber used per 1 m 2 ) is 100 to 17
The range of 5 g / m 2 is used. This is 10
If less than 0 g / m 2 is used, the amount of carbon fibers is too small and the reinforcing effect tends to be insufficient, and a large number of prepregs are used to obtain the desired strength. It is easy to get worse. Also 175 g /
This is because the prepreg becomes stiff and lacking in flexibility when it exceeds m 2 and it becomes difficult to follow the shape of the structure to be reinforced. Then, the reinforcing method using such a prepreg is usually a method of filling a scratch on the reinforcing surface or performing a cross-section correction treatment such as scraping, then applying a primer layer, attaching a prepreg, and thermosetting this. Has been done.
【０００３】しかしながらかかる方法では、熱硬化させ
るために大きな機械装置が必要であり、例えば橋の底面
のように、場所によっては作業が非常に困難になってい
るのが現状であった。そこで本発明者らは、検討の末、
特開平３−２２４９６６号公報に記載したように、貼付
したプリプレグの上に、常温硬化型樹脂を塗布すること
により、加熱装置を使用しなくてもプリプレグの部分ま
で硬化してしまう方法を発明し、加熱の必要をなくし、
プリプレグによる補修方法の適用場面を大幅に拡大し、
また作業量も減らすことに成功した。However, in such a method, a large mechanical device is required for thermosetting, and it is the current situation that the work is very difficult depending on the place such as the bottom of the bridge. Therefore, the present inventors, after examination,
As described in Japanese Patent Application Laid-Open No. 3-224966, the invention has invented a method in which a room temperature curable resin is applied onto a pasted prepreg so that even a portion of the prepreg is cured without using a heating device. Eliminates the need for heating,
Significantly expanding the application of repair methods using prepreg,
It also succeeded in reducing the amount of work.
【０００４】[0004]
【発明が解決すべき課題】しかしながらかかる方法は、
画期的方法ではあったが、外観の点に問題があった。特
に上向き作業の場合には、一部に浮き上がったように見
える部分が生じやすく、仕上がりに問題が生じることが
あり、外から見える部分には使用しにくいため、改善が
求められている。又、所望の強度を得るためには、プリ
プレグを何層か重ねなければならないこともあり、作業
の手間がかかることもあった。However, such a method is
It was a revolutionary method, but there was a problem in terms of appearance. Particularly in the case of upward work, a part that seems to be lifted is likely to occur and a problem may occur in the finish, and it is difficult to use it in the part visible from the outside, so improvement is required. Further, in order to obtain a desired strength, it may be necessary to stack several layers of prepregs, which may take a lot of work.
【０００５】[0005]
【課題を解決するための手段】そこで本発明者らは、鋭
意研究の結果、かかる課題が、繊維と樹脂の量を共に従
来使用されていなかった、ある適当な範囲にした構造物
補強用プリプレグを用いることにより、解決されること
を見出し本発明に到達した。すなわち本発明の目的は、
加熱装置を使用せず、かつ補強後の外観の美しい補強用
プリプレグを提供することであり、本発明の他の目的
は、何枚ものプリプレグを重ね張りしなくても高強度の
補強ができる補強用プリプレグを提供することであり、
そして本発明の他の目的は、保存性に優れ、工事現場等
での保管の手間が少なくてすむ補強用プリプレグを提供
することである。そしてかかる本発明の目的は、補強用
繊維が炭素繊維であり、樹脂含有量が１５重量％以下か
つＦＡＷ（１ｍ2 当たりの使用する炭素繊維の重さ）が
２００ｇ／ｍ2 以上である構造物補強用プリプレグ、及
び補強面上にプライマー層を設けた後、補強用繊維が炭
素繊維であり、樹脂含有量が１５％重量以下かつＦＡＷ
が２００ｇ／ｍ2 以上であるプリプレグを補強面に張り
つけ、該プリプレグの上から常温硬化型樹脂を塗布し、
硬化させることを特徴とする構造物の補強方法により容
易に達成される。As a result of earnest research, the inventors of the present invention have found that such a problem is that the prepreg for reinforcing a structure has a proper range in which the amounts of the fiber and the resin have not been conventionally used. The present invention has been found to be solved by using, and has reached the present invention. That is, the object of the present invention is to
Another object of the present invention is to provide a reinforcing prepreg that does not use a heating device and has a beautiful appearance after reinforcement, and another object of the present invention is a reinforcement capable of high-strength reinforcement without laminating many prepregs. Is to provide prepreg for
Another object of the present invention is to provide a reinforcing prepreg which has excellent preservability and requires less labor for storage at a construction site or the like. And an object of the present invention is a structure in which the reinforcing fiber is carbon fiber, the resin content is 15% by weight or less, and the FAW (weight of carbon fiber used per 1 m 2 ) is 200 g / m 2 or more. After providing the reinforcing prepreg and the primer layer on the reinforcing surface, the reinforcing fiber is carbon fiber, the resin content is 15% by weight or less and FAW
A prepreg of 200 g / m 2 or more is attached to the reinforcing surface, and a room temperature curable resin is applied on the prepreg,
It is easily achieved by a method of reinforcing a structure characterized by hardening.
【０００６】以下本発明を詳細に説明する。本発明のプ
リプレグに用いられる炭素繊維は、ＰＡＮ系、ピッチ系
あるいはその他の原料から製造されたものが使用でき
る。本発明のプリプレグは、その特徴として樹脂の含有
量が１５重量％以下であることが必要である。そして好
ましい範囲としては、８〜１２重量％である。１５重量
％を越えると、ＦＡＷが２００ｇ／ｍ2 以上である本発
明のプリプレグでは、しなやかさを失ってしまいやす
く、補強面に凹凸があった場合に追随できなくなる可能
性が生じる。又、樹脂の絶対量でいうなら、１４ｇ／ｍ
2 以上が好ましく、１７ｇ／ｍ2 以上が含浸が容易にな
るため特に好ましい。The present invention will be described in detail below. The carbon fiber used in the prepreg of the present invention may be PAN-based, pitch-based or manufactured from other raw materials. The characteristic feature of the prepreg of the present invention is that the resin content is 15% by weight or less. And a preferable range is 8 to 12% by weight. When it exceeds 15% by weight, the prepreg of the present invention having a FAW of 200 g / m 2 or more is likely to lose its flexibility and may not be able to follow when the reinforcing surface has irregularities. Also, in terms of the absolute amount of resin, 14g / m
2 or more is preferable, and 17 g / m 2 or more is particularly preferable because impregnation becomes easy.
【０００７】これを重量％に換算すると、ＦＡＷが３０
０ｇ／ｍ2 のときであれば１４／（３００＋１４）≒
４．５重量％以上、ＦＡＷが４００ｇ／ｍ2 のときであ
れば１４／（４００＋１４）≒３．４重量％以上とな
る。本発明のプリプレグは、同時にＦＡＷが２００ｇ／
ｍ2 以上とする。特にＦＡＷが３００ｇ／ｍ2 以上であ
ると、従来のプリプレグに比べて少ない枚数で十分な補
強硬化を得るのに好適である。２００ｇ／ｍ2 未満のプ
リプレグでは、繊維の量が少なくなりすぎ、本発明のよ
うに、樹脂の含有量が少なく、１５重量％以下である
と、プリプレグとしての保形性が悪化してしまう。ＦＡ
Ｗの上限は、プリプレグとして使用できれば特に限定さ
れないが、通常６００ｇ／ｍ2 以下が作業性の点から好
ましい。又炭素繊維の状態としては、繊維の直線性が損
なわれず、強度の発現に有利な１軸方向に配列した長繊
維を使用する。Converting this to weight%, FAW is 30
If it is 0 g / m 2 , 14 / (300 + 14) ≈
When the FAW is 400 g / m 2 , it is 14 / (400 + 14) ≈3.4% by weight or more. The prepreg of the present invention has a FAW of 200 g /
m 2 or more. In particular, when the FAW is 300 g / m 2 or more, it is suitable for obtaining sufficient reinforcement hardening with a smaller number of sheets as compared with the conventional prepreg. If the prepreg is less than 200 g / m 2 , the amount of the fiber becomes too small, and as in the present invention, the content of the resin is too small, and if it is 15% by weight or less, the shape retention as the prepreg deteriorates. FA
The upper limit of W is not particularly limited as long as it can be used as a prepreg, but usually 600 g / m 2 or less is preferable from the viewpoint of workability. As the carbon fibers, long fibers arranged in a uniaxial direction, which is advantageous for expressing strength without impairing the linearity of the fibers, are used.
【０００８】本発明のプリプレグに用いられる樹脂は、
高温硬化型のものであれば特に限定されないが、通常７
０℃以上の硬化温度を有するものであれば好ましく、フ
ェノール樹脂、エポキシ樹脂、不飽和ポリエステル樹
脂、ジアリルフタレート樹脂、ビスマレイミド樹脂、ポ
リイミド、ポリアミドイミド、ポリウレタン樹脂等が用
いられる。The resin used in the prepreg of the present invention is
It is not particularly limited as long as it is a high temperature curing type, but usually 7
A resin having a curing temperature of 0 ° C. or higher is preferable, and a phenol resin, an epoxy resin, an unsaturated polyester resin, a diallyl phthalate resin, a bismaleimide resin, a polyimide, a polyamideimide, a polyurethane resin or the like is used.
【０００９】本発明のプリプレグのより好ましい態様と
しては、各種繊維製の布を少なくとも一方の面に積層し
てなることである。本発明のプリプレグは樹脂の量が少
ないため、その分炭素繊維の量を多くして、保形性を従
来品に匹敵するものとしているが、従来品以上の保形性
を得るための方法としてかかる方法が好適である。各種
繊維製の布としては、特に限定されないが、ナイロン、
芳香族ポリアミド繊維、炭素繊維、ガラス繊維等の各種
繊維の布が好適に使用される。この内特に好適なのはガ
ラス繊維の布である。従来の離型紙と異なり、かかる布
を用いた場合には、それを剥がす必要がなく、そのまま
補強材の一部として使用することができるのも効果の一
つである。A more preferred embodiment of the prepreg of the present invention is that a cloth made of various fibers is laminated on at least one surface. Since the prepreg of the present invention has a small amount of resin, the amount of carbon fibers is increased accordingly, and the shape retention property is comparable to the conventional product, but as a method for obtaining the shape retention property higher than that of the conventional product. Such a method is suitable. The cloth made of various fibers is not particularly limited, but nylon,
Cloths of various fibers such as aromatic polyamide fibers, carbon fibers, glass fibers are preferably used. Particularly preferred among these is glass fiber cloth. Unlike the conventional release paper, when such a cloth is used, it is not necessary to peel it off and it can be used as it is as a part of the reinforcing material, which is one of the effects.
【００１０】本発明のプリプレグは常法に従って作成で
き、特に製造にあたり特別な方法を用いる必要はない。
製造方法の一例を一面にガラス繊維の布（以下「ガラス
スクリム」という。）を積層した例で説明する。まず離
型紙上に炭素繊維をＦＡＷが２００ｇ／ｍ2 以上となる
量を載せ、樹脂含浸し、加熱し、樹脂をＢステージまで
硬化させ、プリプレグ化した後、この上にガラススクリ
ムを接着剤を介して張りつけ、最後に離型紙を剥がせば
よい。The prepreg of the present invention can be produced according to a conventional method, and it is not necessary to use a special method for production.
An example of the manufacturing method will be described with an example in which a glass fiber cloth (hereinafter referred to as "glass scrim") is laminated on one surface. First, carbon fiber was placed on a release paper in an amount such that FAW was 200 g / m 2 or more, impregnated with resin, heated to cure the resin to the B stage, prepregized, and then a glass scrim was coated with an adhesive. Stick it through and release the release paper at the end.
【００１１】あるいは離型紙上にガラススクリムを載
せ、その上に樹脂を載せる。その上に炭素繊維をＦＡＷ
が２００ｇ／ｍ2 以上となる量を載せ、その上に樹脂、
さらにその上に離型紙を載せる。この状態で適当に加熱
し、樹脂をＢステージまで硬化させ、プリプレグ化し、
両面の離型紙を剥がしても本発明の補強用プリプレグが
得られる。Alternatively, a glass scrim is placed on the release paper and a resin is placed thereon. FAW carbon fiber on it
Of 200 g / m 2 or more is placed on top of the resin,
Further, release paper is placed on it. In this state, heat appropriately to cure the resin to the B stage, make prepreg,
The reinforcing prepreg of the present invention can be obtained even if the release paper on both sides is peeled off.
【００１２】本発明の補強用プリプレグを用いた補強方
法としては、まず最初に補強される面が新しく作られた
ものではない場合には、前もって補修面の傷を削った
り、穴埋め補修したりすることが望ましい。その後、補
強面上にプライマー層を設ける。プライマー層として使
用される樹脂は、各種の常温硬化型樹脂が使用され、通
常はエポキシ樹脂が使用される。その後本発明の補修用
プリプレグを表面に貼付し、該プリプレグの上から常温
硬化型樹脂を塗布し、自然に硬化させる。常温硬化樹脂
を塗布することにより、プリプレグ中の熱硬化型樹脂も
硬化してしまうので、加熱を行う必要はない。又、浮き
上がりを生じることもない。As a reinforcing method using the reinforcing prepreg of the present invention, when the surface to be first reinforced is not newly made, scratches on the repair surface are repaired or holes are repaired in advance. Is desirable. Then, a primer layer is provided on the reinforcing surface. As the resin used as the primer layer, various room temperature curable resins are used, and usually epoxy resin is used. After that, the repairing prepreg of the present invention is attached to the surface, a room temperature curable resin is applied on the prepreg, and the resin is naturally cured. Since the thermosetting resin in the prepreg is also cured by applying the room temperature curing resin, it is not necessary to perform heating. In addition, there is no floating.
【００１３】プライマー層及びプリプレグに塗布する常
温硬化型樹脂は、同一でも異なっていてもよく、１０〜
４０℃で硬化するものが好ましく、例示すると、尿素樹
脂、レゾルシン樹脂、フェノール樹脂、エポキシ樹脂等
を基材とし、これに硬化剤を混合し、常温で硬化するよ
うにした常温硬化型樹脂である。そして塗布する際には
塗布しやすくするため、シンナー、メチルエチルケト
ン、アセトン等の溶媒を使用すればよい。The cold-setting resin applied to the primer layer and the prepreg may be the same or different.
A resin that cures at 40 ° C. is preferable, and by way of example, it is a room temperature curable resin that has a base material such as urea resin, resorcin resin, phenol resin, or epoxy resin, and is mixed with a curing agent to cure at room temperature. . When applying, a solvent such as thinner, methyl ethyl ketone, or acetone may be used in order to facilitate the application.
【００１４】従来のプリプレグによる補修方法は、しば
しば複数のプリプレグを重張りして必要な強度を得てい
たが、本発明においては、ＦＡＷが２００ｇ／ｍ2 以上
と大きいので、プリプレグを重ねなくても、十分な強度
を得やすく、又重ね張りを行う場合でも、重ねる枚数を
減らすことができ、有利である。又かかる樹脂含有量が
１５重量％以下かつＦＡＷが２００ｇ／ｍ2 以上である
範囲を選択することにより、補強繊維をクロスシートに
した場合とほぼ同様のしなやかさを得ることができ、且
つクロスシートと異なり補強繊維の直線性がよいので、
強度の発現性が高い。又樹脂含有量が少ないため、夏期
になっても硬化が進みにくく、保存性に特に優れてい
る。In the conventional repair method using prepreg, a plurality of prepregs are often overlaid to obtain the required strength. However, in the present invention, the FAW is as large as 200 g / m 2 or more, so that the prepregs do not need to be overlapped. However, it is advantageous because it is easy to obtain sufficient strength, and the number of sheets to be laminated can be reduced even when the layers are laminated. Further, by selecting the range in which the resin content is 15% by weight or less and the FAW is 200 g / m 2 or more, it is possible to obtain the flexibility which is almost the same as the case where the reinforcing fiber is a cross sheet, and the cross sheet is Since the linearity of the reinforcing fiber is good, unlike
High strength development. Further, since the resin content is small, curing does not easily proceed even in the summer, and the storage stability is particularly excellent.
【００１５】[0015]
【実施例】以下本発明を実施例を用いて説明するが、本
発明はその要旨を越えない限り、実施例に限定されるも
のではない。 （実施例１）離型紙上に炭素繊維をＦＡＷ、３３０ｇ／
ｍ2 載せ、硬化温度１２０℃のエポキシ樹脂を３０ｇ／
ｍ2 含浸させ、加熱し、樹脂をＢステージまで硬化させ
たプリプレグを製造した。この片面にガラススクリムを
接着剤を介して張りつけ、最後に離型紙を剥がして、ガ
ラススクリム（２５ｇ／ｍ2 ）を付けた、樹脂含有量を
８．３重量％、ＦＡＷが３３０ｇ／ｍ2 のプリプレグを
製造した。このプリプレグはしなやかで、炭素繊維の風
合いのよくでたものであった。このプリプレグを２５℃
で１０日間放置したが、しなやかさはほとんど失われな
かった。EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to the examples as long as the gist thereof is not exceeded. Example 1 Carbon fiber FAW on release paper, 330 g /
m 2 loaded, the curing temperature 120 ° C. of the epoxy resin 30 g /
m 2 was impregnated and heated to prepare a prepreg in which the resin was cured to the B stage. A glass scrim was attached to this one side with an adhesive, and the release paper was peeled off at the end, and a glass scrim (25 g / m 2 ) was attached. The resin content was 8.3% by weight and the FAW was 330 g / m 2 . A prepreg was manufactured. This prepreg was supple and had a good texture of carbon fiber. This prepreg is 25 ℃
I left it for 10 days, but the suppleness was hardly lost.
【００１６】（実施例２）実施例１で得たプリプレグ
を、全長５ｍ、全幅２ｍの実験用橋梁の下面に、プライ
マー層として常温硬化型エポキシ樹脂（”ＥＡ９４３
４”豊田合成株式会社製）を塗布し、その上に１ｍ×１
ｍに切断したプリプレグをガラススクリム面がライマー
層に接するように張り付け、この上から更に常温硬化型
エポキシ樹脂（”ＥＡ９４３４”豊田合成株式会社製を
メチルエチルケトンに溶解させ、２３℃で３０００セン
チポイズになるように調整した）を塗布含浸させ、硬化
させた。表面の状態は、ほとんど浮き上がりがない美し
いものであった。(Example 2) The prepreg obtained in Example 1 was applied to a lower surface of an experimental bridge having a total length of 5 m and a total width of 2 m as a primer layer at room temperature curing type epoxy resin ("EA943").
4 "made by Toyoda Gosei Co., Ltd., and 1m x 1 on it
The prepreg cut into m was attached so that the glass scrim surface was in contact with the lymer layer, and the room temperature curable epoxy resin (“EA9434” manufactured by Toyota Gosei Co., Ltd.) was further dissolved in methyl ethyl ketone so that the temperature became 3000 centipoise at 23 ° C. Was prepared by coating and impregnation. The surface condition was beautiful with almost no uplift.
【００１７】（比較例１）離型紙上に炭素繊維をＦＡ
Ｗ、３００ｇ／ｍ2 載せ、硬化温度１２０℃のエポキシ
樹脂を１５０ｇ／ｍ2 含浸させ、加熱し、樹脂をＢステ
ージまで硬化させたプリプレグを製造した。このプリプ
レグのＦＡＷは３００ｇ／ｍ2 、樹脂含有量は、約３３
重量％である。得られたプリプレグは、硬く、あまりし
なやかではなかった。このプリプレグを２５℃で１０日
間放置し、その後曲げてみたところ、かなり硬くしなや
かさに欠けていたため、離型紙から剥がれてしまった。
また、補強用としては、補強面の凹凸に追随することは
困難なものであった。(Comparative Example 1) Carbon fiber was coated with FA on release paper.
W, 300 g / m 2 was placed, 150 g / m 2 of an epoxy resin having a curing temperature of 120 ° C. was impregnated and heated to manufacture a prepreg in which the resin was cured to the B stage. The FAW of this prepreg is 300 g / m 2 , and the resin content is about 33.
% By weight. The obtained prepreg was hard and not very flexible. When this prepreg was left at 25 ° C. for 10 days and then bent, it was peeled from the release paper because it was quite hard and lacked in flexibility.
In addition, it was difficult to follow the unevenness of the reinforcing surface for reinforcement.
【００１８】（比較例２）離型紙上に炭素繊維をＦＡ
Ｗ、１７０ｇ／ｍ2 載せ、硬化温度１２０℃のエポキシ
樹脂を９０ｇ／ｍ2 含浸させ、加熱し、樹脂をＢステー
ジまで硬化させたプリプレグを製造した。このプリプレ
グのＦＡＷは１７０ｇ／ｍ2 、樹脂含有量は、約３５重
量％である。このプリプレグはしなやかで、炭素繊維の
風合いのよくでたものであった。このプリプレグを２５
℃で１０日間放置したところ、多少しなやかさが失われ
た感があった。このプリプレグを実施例２と同様にして
全長５ｍ、全幅２ｍの実験用橋梁の下面に、プライマー
層として常温硬化型エポキシ樹脂（”ＥＡ９４３４”豊
田合成株式会社製）を塗布し、その上に１ｍ×１ｍに切
断したプリプレグをほぼ同一の強度を得るため２層重ね
張りし、この上から更に常温硬化型エポキシ樹脂（”Ｅ
Ａ９４３４”豊田合成株式会社製をメチルエチルケトン
に溶解させ、２３℃で３０００センチポイズになるよう
に調整した）を塗布含浸させ、硬化させたところ、表面
の約１２％程度に浮き上がって見える部分を生じてしま
った。(Comparative Example 2) Carbon fiber was coated with FA on release paper.
W, 170 g / m 2 placed, the curing temperature 120 ° C. of the epoxy resin 90 g / m 2 was impregnated and heated to produce a prepreg to cure the resin to a B-stage. The FAW of this prepreg is 170 g / m 2 , and the resin content is about 35% by weight. This prepreg was supple and had a good texture of carbon fiber. This prepreg is 25
When left at 10 ° C. for 10 days, there was a feeling that the suppleness was somewhat lost. This prepreg was coated with a room temperature curable epoxy resin (“EA9434” manufactured by Toyota Gosei Co., Ltd.) as a primer layer on the lower surface of an experimental bridge having a total length of 5 m and a total width of 2 m in the same manner as in Example 2 and 1 m × Two layers of prepreg cut to 1 m were laminated to obtain almost the same strength, and then room temperature curing type epoxy resin (“E
A9434 "manufactured by Toyoda Gosei Co., Ltd. was dissolved in methyl ethyl ketone and adjusted so as to have 3000 centipoise at 23 ° C.), and impregnated and cured. As a result, about 12% of the surface was lifted to form a visible portion. It was
【００１９】（比較例３）離型紙上に炭素繊維をＦＡ
Ｗ、１２０ｇ／ｍ2 載せ、硬化温度１２０℃のエポキシ
樹脂を２０ｇ／ｍ2 含浸させ、加熱し、樹脂をＢステー
ジまで硬化させたプリプレグを製造した。このプリプレ
グのＦＡＷは１２０ｇ／ｍ2 、樹脂含有量は、約１１重
量％である。このプリプレグはしなやかであったが、曲
げてみると、繊維がバラバラに離れてしまい、プリプレ
グとしては使用出来ないものであった。(Comparative Example 3) Carbon fiber was coated with FA on release paper.
W, 120 g / m 2 was placed, and 20 g / m 2 of an epoxy resin having a curing temperature of 120 ° C. was impregnated and heated to manufacture a prepreg in which the resin was cured to the B stage. The FAW of this prepreg is 120 g / m 2 , and the resin content is about 11% by weight. Although this prepreg was supple, when it was bent, the fibers were separated and could not be used as a prepreg.
【００２０】[0020]
【発明の効果】本発明により、加熱装置を使用せず、か
つ補強後の外観が美しく、何枚ものプリプレグを重張り
しなくても高強度の補強ができ、工事現場での保存性に
優れた補強用プリプレグとそれを用いた補強方法を提供
する。EFFECTS OF THE INVENTION According to the present invention, a heating device is not used, the appearance after reinforcement is beautiful, and high-strength reinforcement can be performed without the need for a large number of prepregs. A reinforcing prepreg and a reinforcing method using the same are provided.
Claims (3)
が１５重量％以下かつＦＡＷ（１ｍ 2 当たりに使用する
炭素繊維の重さ）が２００ｇ／ｍ2 以上である構造物補
強用プリプレグ。1. The reinforcing fiber is carbon fiber, and the resin content is
Is 15% by weight or less and FAW (1 m 2Use to hit
Carbon fiber weight) is 200g / m2The above structure supplement
Heavy duty prepreg.
積層してなる請求項１記載の構造物補強用プリプレグ。2. The prepreg for reinforcing a structure according to claim 1, wherein a glass fiber cloth is laminated on at least one surface.
後、補強用繊維が炭素繊維である、樹脂含有量が１５％
重量以下かつＦＡＷが２００ｇ／ｍ2 以上であるプリプ
レグを補強面に張りつけ、該プリプレグの上から常温硬
化型樹脂を塗布し、硬化させることを特徴とする構造物
の補強方法。3. The reinforcing fiber is carbon fiber after the primer layer is provided on the reinforcing surface of the structure, and the resin content is 15%.
A method of reinforcing a structure, comprising: sticking a prepreg having a weight of FAW of 200 g / m 2 or more to a reinforcing surface, applying a room temperature curable resin on the prepreg, and curing the resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17687093A JPH0734677A (en) | 1993-07-16 | 1993-07-16 | Prepreg for structure reinforcement and reinforcement method using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17687093A JPH0734677A (en) | 1993-07-16 | 1993-07-16 | Prepreg for structure reinforcement and reinforcement method using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0734677A true JPH0734677A (en) | 1995-02-03 |
Family
ID=16021239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17687093A Pending JPH0734677A (en) | 1993-07-16 | 1993-07-16 | Prepreg for structure reinforcement and reinforcement method using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734677A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861862A2 (en) | 1997-02-28 | 1998-09-02 | Mitsubishi Chemical Corporation | Method for reinforcing structures |
| WO1999061725A1 (en) * | 1998-05-26 | 1999-12-02 | Mitsubishi Rayon Co., Ltd. | Method for repairing and reinforcing existing concrete structure and resin |
| JP2009091793A (en) * | 2007-10-09 | 2009-04-30 | Sumitomo Rubber Ind Ltd | Sheet for reinforcing bi-directional concrete with window and method for reinforcing concrete structure using the reinforcing sheet |
| JP2013544688A (en) * | 2010-12-06 | 2013-12-19 | ユニバーシティ オブ テネシー リサーチ ファウンデーション | High-strength, high-elastic composite material and method for reinforcing a substrate thereby |
-
1993
- 1993-07-16 JP JP17687093A patent/JPH0734677A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0861862A2 (en) | 1997-02-28 | 1998-09-02 | Mitsubishi Chemical Corporation | Method for reinforcing structures |
| EP0861862A3 (en) * | 1997-02-28 | 1999-12-15 | Mitsubishi Chemical Corporation | Method for reinforcing structures |
| US6017588A (en) * | 1997-02-28 | 2000-01-25 | Mitsubishi Chemical Corporation | Method for reinforcing structures |
| WO1999061725A1 (en) * | 1998-05-26 | 1999-12-02 | Mitsubishi Rayon Co., Ltd. | Method for repairing and reinforcing existing concrete structure and resin |
| KR100429959B1 (en) * | 1998-05-26 | 2004-05-03 | 미쯔비시 레이온 가부시끼가이샤 | Method for Repairing and Reinforcing Existing Concrete Structure and Resin |
| JP2009091793A (en) * | 2007-10-09 | 2009-04-30 | Sumitomo Rubber Ind Ltd | Sheet for reinforcing bi-directional concrete with window and method for reinforcing concrete structure using the reinforcing sheet |
| JP2013544688A (en) * | 2010-12-06 | 2013-12-19 | ユニバーシティ オブ テネシー リサーチ ファウンデーション | High-strength, high-elastic composite material and method for reinforcing a substrate thereby |
| EP2648905A4 (en) * | 2010-12-06 | 2016-02-17 | Univ Tennessee Res Foundation | HIGHLY RESISTANT AND VERY ELASTIC COMPOSITE MATERIALS AND METHODS USING THE COMPOSITE MATERIALS FOR REINFORCING SUBSTRATES |
| JP2017149149A (en) * | 2010-12-06 | 2017-08-31 | ユニバーシティ オブ テネシー リサーチ ファウンデーション | High-strength, high-elastic composite material and method for reinforcing a substrate thereby |
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