JPH06193281A - Concrete repairing method with unidirectionally arranged fiber-reinforced sheet - Google Patents
Concrete repairing method with unidirectionally arranged fiber-reinforced sheetInfo
- Publication number
- JPH06193281A JPH06193281A JP4359044A JP35904492A JPH06193281A JP H06193281 A JPH06193281 A JP H06193281A JP 4359044 A JP4359044 A JP 4359044A JP 35904492 A JP35904492 A JP 35904492A JP H06193281 A JPH06193281 A JP H06193281A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing
- sheet
- fiber
- reinforcing fiber
- fiber sheet
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
Landscapes
- Bridges Or Land Bridges (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、一方向に配列した強化
繊維を有する強化繊維シートをコンクリート補修面に適
合し、この強化繊維にマトリクス樹脂を含浸させて硬化
することによりコンクリート面を補修する方法に関する
ものであり、特に、強化繊維シートのコンクリート面に
対する接着強度を向上させ、補修強度を増大することの
できるコンクリート補修方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention adapts a reinforcing fiber sheet having reinforcing fibers arranged in one direction to a concrete repair surface, and impregnates the reinforcing fiber with a matrix resin to cure the concrete surface to repair the concrete surface. The present invention relates to a method, and more particularly to a concrete repair method capable of improving the adhesive strength of a reinforcing fiber sheet to a concrete surface and increasing the repair strength.
【０００２】[0002]
【従来の技術】近年、橋梁や高架道路などの橋脚を繊維
強化プラスチックにより補修することが行なわれてい
る。本出願人は、特開平３−２２２７３４号公報、特開
平３−２２４９０１号公報などに記載されるように、補
修現場で施工性良く補修を行なうことができ且つ補修後
の強度も向上した構築物の補修のための強化繊維シート
を提案した。図５にこの一方向配列強化繊維シートの概
略を示す。2. Description of the Related Art In recent years, bridge piers such as bridges and elevated roads have been repaired with fiber reinforced plastics. As described in JP-A-3-222734, JP-A-3-224901, etc., the applicant of the present invention can construct a structure which can be repaired at a repair site with good workability and also has improved strength after repair. A reinforced fiber sheet for repair was proposed. FIG. 5 shows an outline of the unidirectionally arranged reinforcing fiber sheet.
【０００３】つまり、強化繊維シート１は、接着剤層３
が設けられた支持体２と、接着剤層３を介して支持体２
上に一方向に配列して接着された強化繊維４とからな
る。又、この強化繊維シート１は、橋梁や高架道路など
の補修現場で強化繊維４にマトリクス樹脂を含浸させ
て、補修面に貼り付けた後硬化される。That is, the reinforcing fiber sheet 1 has the adhesive layer 3
And the support 2 provided with the adhesive 2 and the support 2
The reinforcing fibers 4 are arranged in one direction and bonded to the upper side. Further, the reinforcing fiber sheet 1 is hardened after the reinforcing fiber 4 is impregnated with a matrix resin at a repair site such as a bridge or an elevated road and attached to the repair surface.
【０００４】この強化繊維シ−ト１上の強化繊維４への
マトリクス樹脂の含浸は、シ−ト１を補修面に貼り付け
る前に行なうか、或は、補修面にマトリクス樹脂を塗布
し、その上からシ−ト１を貼り付けて押し付けることに
よりマトリクス樹脂を強化繊維に含浸させることが行な
われている。又、よりマトリクス樹脂の強化繊維への含
浸性を良くするために、強化繊維シ−ト１の支持体２を
ガラス繊維クロスシートなどで作製し、強化繊維シ−ト
１を補修面に貼り付けた後、支持体２側からマトリクス
樹脂を塗布し、マトリクス樹脂を強化繊維へと含浸させ
ることが行なわれている。The impregnation of the reinforcing resin 4 on the reinforcing fiber sheet 1 with the matrix resin is carried out before the sheet 1 is attached to the repair surface, or the matrix resin is applied to the repair surface. A matrix resin is impregnated into the reinforcing fiber by pasting and pressing the sheet 1 from above. In order to improve the impregnation property of the matrix resin into the reinforcing fiber, the support 2 of the reinforcing fiber sheet 1 is made of glass fiber cloth sheet or the like, and the reinforcing fiber sheet 1 is attached to the repair surface. After that, the matrix resin is applied from the support 2 side to impregnate the reinforcing resin with the matrix resin.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、本発明
者らの研究実験の結果によると、補修面が橋梁や高架道
路のコンクリート面であり、しかも物理的に長さが十分
に採れず、強化繊維シートのための貼付け面積を十分に
確保し得ないような補強箇所の場合には、上記いずれの
方法にて強化繊維シート１をコンクリート面に貼り付け
たとしても、図３に示すように、矢印Ｍ方向に曲げ応力
が加わる場合には、梁５のコンクリート補修面５ａと強
化繊維シート１との間の接着面に発生する剪断応力によ
り、先ず、強化繊維シート１のいずれかの端部が剥離
し、その後この剥離が強化繊維シート１全体へと波及
し、強化繊維シート１による補強効果が急激に低下する
ことが分かった。However, according to the results of the research and experiment conducted by the present inventors, the repair surface is a concrete surface of a bridge or an elevated road, and the physical length of the repair surface is not sufficient. In the case of a reinforced portion where the attachment area for the sheet cannot be sufficiently secured, even if the reinforcing fiber sheet 1 is attached to the concrete surface by any of the above methods, as shown in FIG. When a bending stress is applied in the M direction, first, one of the ends of the reinforcing fiber sheet 1 peels off due to the shearing stress generated on the adhesive surface between the concrete repair surface 5a of the beam 5 and the reinforcing fiber sheet 1. After that, it was found that this peeling spreads to the entire reinforcing fiber sheet 1 and the reinforcing effect of the reinforcing fiber sheet 1 suddenly decreased.
【０００６】従って、本発明の目的は、一方向配列強化
繊維シートにより橋梁や高架道路などを初めとする構築
物の補修をするに際し、十分な貼付け面積を確保し得な
い場合においても、強化繊維シートのコンクリート補修
面に対する接着強度を向上させ、補修強度を増大するこ
とのできるコンクリート補修方法を提供することであ
る。Therefore, an object of the present invention is to provide a reinforcing fiber sheet even when it is impossible to secure a sufficient attachment area when repairing a structure such as a bridge or an elevated road by using the unidirectionally arranged reinforcing fiber sheet. It is an object of the present invention to provide a concrete repairing method capable of improving the adhesive strength to a concrete repair surface and increasing the repair strength.
【０００７】[0007]
【課題を解決するための手段】上記目的は本発明に係る
一方向配列強化繊維シートによるコンクリート補修方法
にて達成される。要約すれば本発明は、一方向に配列し
た強化繊維を有する強化繊維シートをコンクリート補修
面に適合し、この強化繊維にマトリクス樹脂を含浸させ
て硬化することによりコンクリート面を補修する方法に
おいて、強化繊維を有する補強用シートを前記強化繊維
シートの両端部に重ねて配置し、更に、前記補強用シー
ト及び前記強化繊維シートを貫通して止めピンをコンク
リート面に植設することを特徴とする一方向配列強化繊
維シートによるコンクリート補修方法である。The above objects can be achieved by the method for repairing concrete with a unidirectionally arranged reinforcing fiber sheet according to the present invention. In summary, the present invention provides a method of repairing a concrete surface by adapting a reinforcing fiber sheet having unidirectionally arranged reinforcing fibers to a concrete repair surface, impregnating the reinforcing fiber with a matrix resin and curing. A reinforcing sheet having fibers is arranged so as to be overlapped on both ends of the reinforcing fiber sheet, and further, a fixing pin is planted on a concrete surface by penetrating the reinforcing sheet and the reinforcing fiber sheet. This is a concrete repair method using a directional array reinforcing fiber sheet.
【０００８】[0008]
【実施例】図１は本発明に係る補修方法の一実施例を示
すものであって、本実施例では、一方向配列強化繊維シ
ート１を使用して梁５などを補修する場合を示す断面図
である。EXAMPLE FIG. 1 shows an example of a repairing method according to the present invention. In this example, a cross section showing a case where a unidirectionally arranged reinforcing fiber sheet 1 is used to repair a beam 5 or the like. It is a figure.
【０００９】本発明に使用される一方向配列強化繊維シ
ート１は、任意の構成のものを使用し得るが、例えば、
図５に示されるように、支持体２と、接着剤層３を介し
てこの支持体２上に一方向に配列して接着された強化繊
維４とにて構成される。The unidirectionally arranged reinforcing fiber sheet 1 used in the present invention may have an arbitrary constitution.
As shown in FIG. 5, it is composed of a support body 2 and reinforcing fibers 4 which are arranged in one direction on the support body 2 via an adhesive layer 3 and bonded.
【００１０】支持体２は、補修時における強化繊維４へ
のマトリクス樹脂の含浸性を良くするために、スクリム
クロス、ガラスペーパー、ガラス不織布、ガラス繊維ク
ロス、ポリアミド、ＰＰＳ（ポリフェニレンサルファイ
ド）などの各種ポリマーの不織布などを使用するのが好
ましい。The support 2 is made of various materials such as scrim cloth, glass paper, glass non-woven fabric, glass fiber cloth, polyamide and PPS (polyphenylene sulfide) in order to improve the impregnation property of the matrix resin into the reinforcing fibers 4 during repair. It is preferable to use a polymer non-woven fabric or the like.
【００１１】又、接着剤層３を形成する接着剤として
は、原則として支持体２上に強化繊維４を一時的に接着
できるものならば何でもよいが、好ましくは接着剤はマ
トリクス樹脂との相溶性のよい樹脂を使用することが良
く、例えばマトリクス樹脂としてエポキシ樹脂を使用す
るときには、エポキシ系の接着剤を用いることがよい。
接着剤層３の厚みとしては、強化繊維４を支持体２上に
一時的に接着できればよいことから、１〜５０μｍ、好
ましくは３〜２０μｍ程度あればよい。In principle, any adhesive can be used as the adhesive for forming the adhesive layer 3 as long as the reinforcing fibers 4 can be temporarily adhered to the support 2, but the adhesive is preferably a matrix resin. It is preferable to use a resin having a good solubility. For example, when an epoxy resin is used as the matrix resin, an epoxy adhesive is preferably used.
The thickness of the adhesive layer 3 may be 1 to 50 μm, preferably 3 to 20 μm, as long as the reinforcing fibers 4 can be temporarily adhered to the support 2.
【００１２】強化繊維４としては、ピッチ系炭素繊維、
ボロン繊維、ＰＡＮ系炭素繊維、アラミド繊維、ガラス
繊維、スチール繊維、ポリエステル繊維、ポリエチレン
繊維など各種の繊維を使用することができる。又、これ
らの繊維は単独で使用する他、２種以上を組合せて繊維
をハイブリッド化して使用することもできる。As the reinforcing fiber 4, pitch-based carbon fiber,
Various fibers such as boron fiber, PAN-based carbon fiber, aramid fiber, glass fiber, steel fiber, polyester fiber and polyethylene fiber can be used. Further, these fibers may be used alone or in combination of two or more kinds to hybridize the fibers.
【００１３】強化繊維４は、これをフィラメントとして
収束剤で多数本収束した繊維束又は軽度に撚りをかけて
収束した繊維束を接着剤層３上に並べて上方から押し潰
すことにより軽度にバラされ、これにより強化繊維４は
収束剤または撚りによる結合により複数層に積層した状
態で、支持体２上に接着剤層３を介して一方向に配列し
て接着される。The reinforcing fibers 4 are lightly separated by arranging a large number of fiber bundles, which are bundled with a sizing agent, as filaments, or lightly twisted and bundled fiber bundles on the adhesive layer 3 and crushing them from above. As a result, the reinforcing fibers 4 are bonded and arranged in one direction on the support 2 via the adhesive layer 3 in a state of being laminated in a plurality of layers by a binding agent or a binding by twisting.
【００１４】このような一方向配列の強化繊維シート１
は、図１に示すように、橋梁や高架道路の梁などの構築
物の補修現場で、ローラ、刷毛、吹付け等の適宜な塗布
手段により強化繊維シート１の強化繊維４にマトリクス
樹脂を塗布して含浸させ、強化繊維４の側を構築物の補
修箇所側として補修されるコンクリート面に貼り付け
る。必要に応じて、強化繊維シート１は所望の数だけ積
層される。好ましくは、積層の度ごとに、支持体２の側
からハンドローラ等でマトリクス樹脂の含浸操作を行な
う。その後、その上にカバーを行い、その後そのまま放
置して、或は加熱して、マトリクス樹脂を硬化する。Such a unidirectionally arranged reinforcing fiber sheet 1
As shown in FIG. 1, a matrix resin is applied to the reinforced fibers 4 of the reinforced fiber sheet 1 by an appropriate application means such as rollers, brushes, spraying, etc. at the repair site of structures such as bridges and beams of elevated roads. Then, the reinforcing fiber 4 side is attached to the concrete surface to be repaired as the side of the structure to be repaired. If necessary, the reinforcing fiber sheets 1 are laminated in a desired number. Preferably, the matrix resin is impregnated with a hand roller or the like from the side of the support 2 every time the layers are laminated. After that, a cover is provided on it, and then it is left as it is or heated to cure the matrix resin.
【００１５】このように、本発明の強化繊維シート１
は、補修に用いる際、補修現場で強化繊維４にマトリク
ス樹脂を含浸させて使用されるが、補修箇所へのシート
１の貼り付け後そのまま放置することにより、マトリク
ス樹脂を硬化することができるようにするために、マト
リクス樹脂は室温硬化型の樹脂を使用するのが好まし
い。Thus, the reinforcing fiber sheet 1 of the present invention
When used for repair, the reinforcing fiber 4 is impregnated with the matrix resin at the repair site, and the matrix resin can be cured by leaving it as it is after the sheet 1 is attached to the repair location. Therefore, it is preferable to use a room temperature curable resin as the matrix resin.
【００１６】室温硬化型樹脂としては、硬化剤及び硬化
促進剤の配合を調節して室温で硬化するようにしたエポ
キシ樹脂、不飽和ポリエステル樹脂等が使用できる。As the room temperature curable resin, an epoxy resin, an unsaturated polyester resin or the like in which the composition of a curing agent and a curing accelerator is adjusted to cure at room temperature can be used.
【００１７】別法として、補修箇所に室温硬化型のマト
リクス樹脂を例えば１００μｍ程度の厚みに塗布し、次
いで強化繊維４の側を補修箇所側として強化繊維シート
１を貼り付ける。必要に応じて、引き続き、同じ手順に
て、強化繊維シート１を所望の数だけ積層し、最後に支
持体２の側から強化繊維４にマトリクス樹脂３０を含浸
させる。又、このとき、各シート１を積層する度に、支
持体２の側から強化繊維４にマトリクス樹脂を含浸させ
ることもできる。その後は、上記と同様に、シート１上
にカバーを行い、その後そのまま放置してマトリクス樹
脂を硬化させる。As an alternative method, a room temperature curing type matrix resin is applied to the repaired portion in a thickness of, for example, about 100 μm, and then the reinforcing fiber sheet 1 is attached with the side of the reinforcing fiber 4 as the repaired portion side. If necessary, subsequently, the desired number of reinforcing fiber sheets 1 are laminated by the same procedure, and finally the reinforcing fibers 4 are impregnated with the matrix resin 30 from the support 2 side. At this time, each time the sheets 1 are laminated, the reinforcing fibers 4 may be impregnated with the matrix resin from the support 2 side. After that, as in the above case, the sheet 1 is covered and then left as it is to cure the matrix resin.
【００１８】本発明によると、強化繊維シート１をコン
クリート面５ａに貼り付けた後、強化繊維シート１が硬
化する前に、更に、所定の幅Ｗ及び厚さを有した補強用
シート１０が強化繊維シート１の両端部に重ねて配置さ
れる。この補強用シート１０は、必要に応じて、更にそ
の他の箇所にも配置することができる。補強用シート１
０の幅Ｗは、後で詳しく説明する止めピン１３の直径に
より任意に設定されるが、一般に１０〜２００ｍｍ、通
常５０ｍｍ程度とされ、厚さは０．２〜２．０ｍｍ程度
にて十分である補強用シート１０は、繊維強化樹脂シー
トとされ、その強化繊維１１が強化繊維シート１の繊維
配列方向とは直交する方向に配列された一方向配列繊維
強化樹脂シートとされる。又、場合によっては、強化繊
維がクロス或はマット状になったものを使用することも
可能である。強化繊維１１は、通常の繊維強化樹脂シー
トと同じく、例えばマトリクス樹脂１２に対して４０〜
６０ｖｏｌ％程度とされる。According to the present invention, after the reinforcing fiber sheet 1 is attached to the concrete surface 5a and before the reinforcing fiber sheet 1 is cured, the reinforcing sheet 10 having a predetermined width W and thickness is further reinforced. The fiber sheet 1 is arranged so as to be overlapped on both ends thereof. The reinforcing sheet 10 can be arranged at other places as required. Reinforcing sheet 1
The width W of 0 is arbitrarily set by the diameter of the stop pin 13 described in detail later, but is generally 10 to 200 mm, usually about 50 mm, and the thickness of about 0.2 to 2.0 mm is sufficient. A certain reinforcing sheet 10 is a fiber reinforced resin sheet, and the reinforced fibers 11 are unidirectionally arranged fiber reinforced resin sheets arranged in a direction orthogonal to the fiber arrangement direction of the reinforced fiber sheet 1. Depending on the case, it is also possible to use a reinforcing fiber in the form of cloth or mat. The reinforcing fiber 11 is, for example, 40 to 40 with respect to the matrix resin 12 as in the case of a normal fiber-reinforced resin sheet.
It is set to about 60 vol%.
【００１９】強化繊維１１としては、ピッチ系炭素繊
維、ボロン繊維、ＰＡＮ系炭素繊維、アラミド繊維、ガ
ラス繊維、スチール繊維、ポリエステル繊維、ポリエチ
レン繊維など各種の繊維を使用することができる。又、
これらの繊維は単独で使用する他、２種以上を組合せて
繊維をハイブリッド化して使用することもできる。As the reinforcing fiber 11, various fibers such as pitch carbon fiber, boron fiber, PAN carbon fiber, aramid fiber, glass fiber, steel fiber, polyester fiber and polyethylene fiber can be used. or,
These fibers may be used alone or in combination of two or more to hybridize the fibers.
【００２０】本発明によれば、更に、補強用シート１０
及び強化繊維シート１を貫通して止めピン１３がコンク
リート面５ａに植設、即ち、エアガンなどにて打ち込ま
れる。別法として、コンクリート面５ａの止めピン１３
が植設される部位に、予め孔を穿設しておき、この孔に
直接に、或は接着剤を充填した後、この孔に止めピン１
３を挿入することも可能である。According to the present invention, the reinforcing sheet 10 is further provided.
Also, the fixing pin 13 is planted in the concrete surface 5a by penetrating the reinforcing fiber sheet 1, that is, driven by an air gun or the like. Alternatively, the retaining pin 13 on the concrete surface 5a
A hole is preliminarily formed in the portion where the is implanted, and the fixing pin 1 is inserted into the hole directly or after filling with an adhesive.
It is also possible to insert 3.
【００２１】止めピン１３は、通常、コンクリート打込
み用として使用されている打込みピンを使用することが
できる。一般に、ピン直径は４ｍｍ、長さ１０ｍｍ程度
のものが好適に使用される。止めピン１３の植設間隔
は、任意に設定し得るが、通常、１００〜２００ｍｍ間
隔とされるであろう。As the stop pin 13, a driving pin which is generally used for concrete driving can be used. Generally, a pin having a diameter of 4 mm and a length of about 10 mm is preferably used. The spacing between the locking pins 13 may be set arbitrarily, but will normally be 100 to 200 mm.
【００２２】本発明者らは、強化繊維４として炭素繊維
を使用し、支持体２としてガラス繊維クロスシートを使
用した強化繊維シート１を作製した。炭素繊維糸目付け
は１７５ｇ／ｍ2 であった。又、強化繊維シート１はそ
の長さが１３５ｍｍ、幅が１５０ｍｍであり、強化繊維
４は長手方向に配列された。補強用シート１０として
は、強化繊維１１として炭素繊維を使用し、マトリクス
樹脂１２としてエポキシ樹脂を使用した、炭素繊維糸目
付け１７５ｇ／ｍ2 の繊維強化樹脂シートを、強化繊維
１１が長手方向に配列されるようにして長さ１５０ｍ
ｍ、幅１０ｍｍに切断して使用した。補強シート１０の
厚さは０．１７ｍｍであった。The present inventors produced a reinforcing fiber sheet 1 using carbon fibers as the reinforcing fibers 4 and a glass fiber cloth sheet as the support 2. The carbon fiber yarn weight was 175 g / m 2 . The reinforcing fiber sheet 1 had a length of 135 mm and a width of 150 mm, and the reinforcing fibers 4 were arranged in the longitudinal direction. As the reinforcing sheet 10, a carbon fiber is used as the reinforcing fiber 11 and an epoxy resin is used as the matrix resin 12, and a fiber reinforced resin sheet having a carbon fiber yarn weight of 175 g / m 2 is arranged in the longitudinal direction. 150m in length
m, width 10 mm was used after cutting. The reinforcing sheet 10 had a thickness of 0.17 mm.
【００２３】図４に示すように、試験片Ｓは、厚さ５０
ｍｍ、幅１５０ｍｍ、長さ４００ｍｍの断面が矩形とさ
れるコンクリート片であり、強化繊維シート１が貼り付
けられるコンクリート面はサンダーがけを行ない、その
後、プライマーを塗布して下地処理を行なった。又、コ
ンクリート面の止めピン１３が植設される部位には、予
め孔を穿設しておき、この孔にエポキシ系接着剤を充填
した。As shown in FIG. 4, the test piece S has a thickness of 50.
mm, width 150 mm, length 400 mm is a concrete piece having a rectangular cross section, the concrete surface to which the reinforcing fiber sheet 1 is attached was sanded, and then a primer was applied to perform a surface treatment. In addition, a hole was previously formed in a portion of the concrete surface where the retaining pin 13 was planted, and this hole was filled with an epoxy adhesive.
【００２４】下地処理したコンクリート面に、マトリク
ス樹脂としてのエポキシ樹脂を含浸した強化繊維シート
１を貼り付け、更に、強化繊維シート１の両端部に補強
用シート１０を重ねて貼り付けた。次いで、補強用シー
ト１０及び強化繊維シート１を貫通して止めピン１３を
突き刺し、止めピン１３の軸部をコンクリート面に植設
した孔内に適合した。そして、強化繊維シート１の樹脂
などを完全に硬化した。A reinforcing fiber sheet 1 impregnated with an epoxy resin as a matrix resin was attached to the ground-treated concrete surface, and further reinforcing sheets 10 were attached to both ends of the reinforcing fiber sheet 1 in an overlapping manner. Then, the reinforcing sheet 10 and the reinforcing fiber sheet 1 were penetrated to pierce the retaining pin 13, and the shaft portion of the retaining pin 13 was fitted into the hole planted in the concrete surface. Then, the resin and the like of the reinforcing fiber sheet 1 were completely cured.
【００２５】図４に示すように、上記試験片Ｓを、互い
に３００ｍｍ離隔した支点Ｆにて支持し、試験片Ｓの中
央部に押圧荷重Ｐを付与した。As shown in FIG. 4, the test piece S was supported by fulcrums F separated from each other by 300 mm, and a pressing load P was applied to the central portion of the test piece S.
【００２６】図３に示す従来の補修方法では、押圧荷重
Ｐが８５０Ｋｇ、変形量０．４５ｍｍにて試験片Ｓの中
央部に亀裂が発生し、同時に、強化繊維シート１は一方
の端部から剥離し、十分な強化繊維シート１による補強
効果が得られなかった。In the conventional repairing method shown in FIG. 3, a crack is generated in the central portion of the test piece S when the pressing load P is 850 kg and the deformation amount is 0.45 mm, and at the same time, the reinforcing fiber sheet 1 starts from one end. It was peeled off and a sufficient reinforcing effect by the reinforcing fiber sheet 1 was not obtained.
【００２７】一方、図１に示す本発明の補修方法によれ
ば、押圧荷重Ｐが８５０Ｋｇ、変形量０．４５ｍｍにて
試験片Ｓの中央部に亀裂が発生し始めたが、脆性的破壊
に至ることはなかった。更に押圧荷重を増大したとこ
ろ、押圧荷重Ｐが１１６０Ｋｇ、変形量１．０ｍｍにて
試験片Ｓは中央部より破壊した。しかしながら、強化繊
維シート１の両端部がコンクリート面から剥離すること
はなく、従来の補修方法より約３５％程度補修強度が増
大した。On the other hand, according to the repairing method of the present invention shown in FIG. 1, a crack started to occur in the central portion of the test piece S when the pressing load P was 850 kg and the deformation amount was 0.45 mm, but brittle fracture occurred. It never came. When the pressing load was further increased, the pressing load P was 1160 kg and the deformation amount was 1.0 mm, and the test piece S was broken from the central portion. However, both ends of the reinforcing fiber sheet 1 were not separated from the concrete surface, and the repair strength was increased by about 35% as compared with the conventional repair method.
【００２８】又、比較例として、補強用シート１０を強
化繊維シート１の両端部に配置せず、直接止めピン１３
を強化繊維シート１の両端部に植設して実験を行なっ
た。この場合には、押圧荷重Ｐが８６０Ｋｇ、変形量
０．４５ｍｍにて試験片Ｓの中央部に亀裂が発生し、同
時に、強化繊維シート１は一方の端部から剥離した。止
めピンを打設した部位の強化繊維シート１は繊維方向に
裂けていた。このように、この比較例では、十分な強化
繊維シート１による補強効果が得られなかった。Further, as a comparative example, the reinforcing sheet 10 is not arranged at both ends of the reinforcing fiber sheet 1, but the fixing pin 13 is directly provided.
Was planted at both ends of the reinforcing fiber sheet 1, and an experiment was conducted. In this case, a crack was generated in the central portion of the test piece S when the pressing load P was 860 kg and the deformation amount was 0.45 mm, and at the same time, the reinforcing fiber sheet 1 was peeled from one end portion. The reinforcing fiber sheet 1 at the portion where the retaining pin was placed was torn in the fiber direction. Thus, in this comparative example, a sufficient reinforcing effect by the reinforcing fiber sheet 1 was not obtained.
【００２９】[0029]
【発明の効果】以上説明したように、本発明に係る一方
向配列強化繊維シートによるコンクリート補修方法によ
れば、強化繊維を有する補強用シートを強化繊維シート
の両端部に重ねて配置し、更に、補強用シート及び強化
繊維シートを貫通して止めピンをコンクリート面に植設
する構成とされるので、一方向配列強化繊維シートによ
り橋梁や高架道路などを初めとする構築物の補修をする
に際し、強化繊維シートのコンクリート補修面に対する
接着強度が向上し、その結果、補修効果が増大する。As described above, according to the method for repairing concrete with a unidirectionally arranged reinforcing fiber sheet according to the present invention, reinforcing sheets having reinforcing fibers are arranged so as to overlap each other at both ends of the reinforcing fiber sheet, and , Since it is configured to penetrate the reinforcing sheet and the reinforcing fiber sheet to plant the locking pin on the concrete surface, when repairing the structure such as a bridge or an elevated road with the unidirectionally arranged reinforcing fiber sheet, The adhesive strength of the reinforcing fiber sheet to the concrete repair surface is improved, and as a result, the repair effect is increased.
【図１】本発明のコンクリート面補修方法の一実施例を
説明する断面図である。FIG. 1 is a cross-sectional view illustrating an embodiment of a concrete surface repairing method of the present invention.
【図２】本発明のコンクリート面補修方法の一実施例を
説明する、図１の下方より見た図である。FIG. 2 is a view for explaining an embodiment of the concrete surface repairing method of the present invention, which is seen from below in FIG.
【図３】従来のコンクリート面補修方法を説明する図で
ある。FIG. 3 is a diagram illustrating a conventional concrete surface repairing method.
【図４】試験片による補強試験方法を説明する斜視図で
ある。FIG. 4 is a perspective view illustrating a reinforcing test method using a test piece.
【図５】本発明に使用し得る強化繊維シートの一実施例
を説明する図である。FIG. 5 is a diagram illustrating an example of a reinforcing fiber sheet that can be used in the present invention.
１ 強化繊維シート ２ 支持体 ３ 接着剤層 ４ 強化繊維 ５ 被補強体 １０ 補強用シート １３ 止めピン 1 Reinforcing Fiber Sheet 2 Support 3 Adhesive Layer 4 Reinforcing Fiber 5 Reinforced Body 10 Reinforcing Sheet 13 Fixing Pin
Claims (1)
繊維シートをコンクリート補修面に適合し、この強化繊
維にマトリクス樹脂を含浸させて硬化することによりコ
ンクリート面を補修する方法において、強化繊維を有す
る補強用シートを前記強化繊維シートの両端部に重ねて
配置し、更に、前記補強用シート及び前記強化繊維シー
トを貫通して止めピンをコンクリート面に植設すること
を特徴とする一方向配列強化繊維シートによるコンクリ
ート補修方法。1. A method of repairing a concrete surface by adapting a reinforcing fiber sheet having reinforcing fibers arranged in one direction to a concrete repair surface, and impregnating the reinforcing fiber with a matrix resin to cure the reinforcing fiber sheet. A unidirectional arrangement characterized in that the reinforcing sheet having the reinforcing sheet is arranged on both ends of the reinforcing fiber sheet, and further, the reinforcing sheet and the reinforcing fiber sheet are penetrated to plant a retaining pin on a concrete surface. Concrete repair method using reinforced fiber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359044A JPH06193281A (en) | 1992-12-25 | 1992-12-25 | Concrete repairing method with unidirectionally arranged fiber-reinforced sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4359044A JPH06193281A (en) | 1992-12-25 | 1992-12-25 | Concrete repairing method with unidirectionally arranged fiber-reinforced sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06193281A true JPH06193281A (en) | 1994-07-12 |
Family
ID=18462455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4359044A Pending JPH06193281A (en) | 1992-12-25 | 1992-12-25 | Concrete repairing method with unidirectionally arranged fiber-reinforced sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06193281A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100271273B1 (en) * | 1997-08-29 | 2000-11-01 | 한만엽 | Structure reinforcement method by enlargement of section area of reinforcement member end-portion |
| JP2002357001A (en) * | 2001-05-30 | 2002-12-13 | Chishin Go | Method for reinforcing structure |
| WO2003027417A1 (en) * | 2001-09-25 | 2003-04-03 | Structural Quality Assurance, Inc. | Reinforcement material and reinforcement structure of structure and method of designing reinforcement material |
| KR20040033238A (en) * | 2002-11-07 | 2004-04-21 | (주)씨씨엘 코리아 | External prestressing strengthening structure using cfrp(carbon fiber reinfroced polymer) plates |
| KR100439922B1 (en) * | 2001-12-14 | 2004-07-12 | 근형기업 주식회사 | Fiber-Reinforced Resin Fire Retardant Pannel And Method of Construction of Concrete Structure For use in such Pannel |
| EP1507052A1 (en) * | 2003-08-13 | 2005-02-16 | Sika Technology AG | Force transfer element |
-
1992
- 1992-12-25 JP JP4359044A patent/JPH06193281A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100271273B1 (en) * | 1997-08-29 | 2000-11-01 | 한만엽 | Structure reinforcement method by enlargement of section area of reinforcement member end-portion |
| JP2002357001A (en) * | 2001-05-30 | 2002-12-13 | Chishin Go | Method for reinforcing structure |
| JP4554845B2 (en) * | 2001-05-30 | 2010-09-29 | 智深 呉 | Structure reinforcement method |
| WO2003027417A1 (en) * | 2001-09-25 | 2003-04-03 | Structural Quality Assurance, Inc. | Reinforcement material and reinforcement structure of structure and method of designing reinforcement material |
| KR100439922B1 (en) * | 2001-12-14 | 2004-07-12 | 근형기업 주식회사 | Fiber-Reinforced Resin Fire Retardant Pannel And Method of Construction of Concrete Structure For use in such Pannel |
| KR20040033238A (en) * | 2002-11-07 | 2004-04-21 | (주)씨씨엘 코리아 | External prestressing strengthening structure using cfrp(carbon fiber reinfroced polymer) plates |
| EP1507052A1 (en) * | 2003-08-13 | 2005-02-16 | Sika Technology AG | Force transfer element |
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