JP2021006695A - Exfoliation prevention sheet of concrete structure and exfoliation prevention method of concrete structure - Google Patents

Exfoliation prevention sheet of concrete structure and exfoliation prevention method of concrete structure Download PDF

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JP2021006695A
JP2021006695A JP2019121201A JP2019121201A JP2021006695A JP 2021006695 A JP2021006695 A JP 2021006695A JP 2019121201 A JP2019121201 A JP 2019121201A JP 2019121201 A JP2019121201 A JP 2019121201A JP 2021006695 A JP2021006695 A JP 2021006695A
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sheet
concrete structure
resin sheet
reinforcing
adhesive
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Inventor
昌之 加古
Masayuki Kako
昌之 加古
靖也 清水
Seiya Shimizu
靖也 清水
小林 茂
Shigeru Kobayashi
茂 小林
知紀 安保
Tomonori Anpo
知紀 安保
朋幸 山口
Tomoyuki Yamaguchi
朋幸 山口
真 松原
Makoto Matsubara
真 松原
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Ube Exsymo Co Ltd
Tekken Corp
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Ube Exsymo Co Ltd
Tekken Corp
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Priority to JP2019121201A priority Critical patent/JP2021006695A/en
Publication of JP2021006695A publication Critical patent/JP2021006695A/en
Priority to JP2024014636A priority patent/JP2024045397A/en
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Abstract

To provide an exfoliation prevention sheet of a concrete structure and an exfoliation prevention method of a concrete structure that even, for example, a repair work unskilled operator or an operator not comprising a sufficient repair tool can easily and immediately conduct temporary exfoliation measures of concrete.SOLUTION: A thin sheet-like reinforcement resin sheet 3 is provided in which reinforcement fiber arranged in a net-like manner by crossing a plurality of fiber yarn is impregnated by synthetic resin. An exfoliation prevention sheet of a concrete structure 1 fixes the reinforcement resin sheet 3 onto the surface of the concrete structure 1. Weather resistance is added to the surface of the reinforcement resin sheet 3. An adhesive sheet 4 covered with a soft adhesive layer 9 is integrally bonded or heat fused to other side surface of the reinforcement resin sheet 3. The reinforcement resin sheet 3 is fixed to the surface of the concrete structure 1 through an adhesive sheet 4.SELECTED DRAWING: Figure 1

Description

本発明は、例えば補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえる、コンクリート構造物の剥落防止シ−トおよびコンクリート構造物の剥落防止工法に関する。 According to the present invention, for example, even a worker who is inexperienced in repair work or a worker who does not have sufficient repair tools can easily and quickly take emergency measures against peeling of concrete. -Regarding the method of preventing peeling of concrete structures.

コンクリート構造物は、雨水等の浸入や塩分との接触、炭酸化による中性化等の影響によって経年的に劣化し、内部の鉄筋が腐食してコンクリートが剥落してしまうため、従来よりコンクリートの剥落防止対策が種々提案されている。
例えば、コンクリート構造物の表面に補強用の繊維シートを接着して被覆し、前記繊維シートは、補強繊維とアクリル樹脂を主剤樹脂とした基材樹脂とからなり、補強繊維の周りを基材樹脂で硬化したFRPシートとし、前記繊維シートに接着樹脂を塗り付け、これを可撓性を有した状態のままコンクリート構造物の表面に貼り付けるようにしたものがある(例えば、特許文献1参照)。
Concrete structures have deteriorated over time due to the effects of infiltration of rainwater, contact with salt, neutralization due to carbonation, etc., and the internal reinforcing bars corrode and the concrete peels off. Various measures to prevent peeling have been proposed.
For example, a reinforcing fiber sheet is adhered and coated on the surface of a concrete structure, and the fiber sheet is composed of a reinforcing fiber and a base resin containing an acrylic resin as a main component, and the base resin surrounds the reinforcing fiber. There is an FRP sheet hardened with (see, for example, Patent Document 1) in which an adhesive resin is applied to the fiber sheet and the fiber sheet is attached to the surface of a concrete structure in a flexible state (see, for example, Patent Document 1). ..

しかし、この工法は、繊維シートに接着樹脂を塗り付ける作業と、繊維シートをコンクリート構造物の表面に貼り付ける作業とを要し、繊維シートの貼り付け後に、繊維シートの縁をアンカ−でコンクリート構造物に止め付ける作業を要して、手間が掛かり各作業に一定の技量を要する等して、未熟な作業者では対応が難しいという問題があった。 However, this method requires the work of applying adhesive resin to the fiber sheet and the work of sticking the fiber sheet to the surface of the concrete structure, and after sticking the fiber sheet, the edge of the fiber sheet is anchored to the concrete structure. There is a problem that it is difficult for an inexperienced worker to deal with it because it requires work to fix it to an object, it takes time and effort, and a certain skill is required for each work.

また、他のコンクリートの剥落防止対策として、版状コンクリート構造体の下面にプライマー処理した後、その上に繊維シート接着用の硬化樹脂を塗布し、縦糸と横糸を編んだアラミド繊維からなる繊維シートに前記樹脂を含浸させ、含浸後の繊維シートを版状コンクリート構造体の下面に貼り付け、更に繊維シートの下面から硬化樹脂を含浸させるようにしたものがある(例えば、特許文献2参照)。 In addition, as another measure to prevent the concrete from peeling off, a fiber sheet made of aramid fibers in which warp threads and weft threads are knitted by applying a primer treatment to the lower surface of the plate-shaped concrete structure and then applying a cured resin for adhering the fiber sheet to the lower surface. Is impregnated with the resin, the impregnated fiber sheet is attached to the lower surface of the plate-shaped concrete structure, and the cured resin is further impregnated from the lower surface of the fiber sheet (see, for example, Patent Document 2).

しかし、前記工法は、プライマー処理や硬化樹脂の塗布、繊維シートの貼り付けや数回に亘る含浸作業を要して手間が掛かり、これらの作業は未熟な作業者では対応が難しいという問題があった。 However, the above-mentioned method requires time and effort for primer treatment, application of cured resin, pasting of fiber sheet, and impregnation several times, and there is a problem that it is difficult for an inexperienced worker to handle these operations. It was.

更に、他のコンクリートの剥落防止対策として、コンクリート躯体の表面に、プライマーを層状に塗布し、この塗布したプライマー層の表面に網状の剥落防止材を層状に配置し、この剥落防止材の表面に2液混合型の樹脂組成物からなる含浸剤を層状に塗布するようにしたものがある(例えば、特許文献3参照)。 Further, as another measure to prevent peeling of concrete, a primer is applied in layers on the surface of the concrete skeleton, and a net-like peeling prevention material is arranged in layers on the surface of the applied primer layer, and the surface of the peeling prevention material is coated. Some impregnants made of a two-component mixed resin composition are applied in layers (see, for example, Patent Document 3).

しかし、前記工法は、多くの工程を要して手間が掛かるとともに、樹脂組成物の組成が複雑かつ高度で、未熟な作業者では対応が非常に難しいという問題があった。 However, the above-mentioned method requires many steps and is troublesome, and the composition of the resin composition is complicated and sophisticated, and there is a problem that it is very difficult for an inexperienced worker to deal with it.

このような問題を解決するものとして、繊維糸ネットと不織布を貼り合わせて一体化し、繊維糸ネットを構成する各繊維糸を扁平状のテープ糸で構成し、繊維糸は縦糸と横糸の2軸配列体で、縦糸と横糸を一定の構造に構成したコンクリート剥落防止シートがある(例えば、特許文献4参照)。 To solve such a problem, the fiber yarn net and the non-woven fabric are laminated and integrated, and each fiber yarn constituting the fiber yarn net is composed of a flat tape yarn, and the fiber yarn has two axes of warp yarn and weft yarn. There is a concrete exfoliation prevention sheet in which warp yarns and weft yarns are arranged in a fixed structure (see, for example, Patent Document 4).

しかし、前記剥落防止シ−トによる工法は、コンクリート表面にプライマー兼接着剤を塗布し、その上に剥落防止シートを繊維糸ネットがコンクリート面となるように貼り合わせ、その上から接着剤を塗布するようにしているため、作業が複雑で未熟な作業者では対
応が難しいという問題があった。
However, in the method using the peeling prevention sheet, a primer and an adhesive are applied to the concrete surface, a peeling prevention sheet is attached onto the concrete surface so that the fiber thread net becomes the concrete surface, and the adhesive is applied from above. Therefore, there is a problem that the work is complicated and it is difficult for an inexperienced worker to deal with it.

特許第5490364号公報Japanese Patent No. 5490364 特許第3477118号公報Japanese Patent No. 3477118 特許第5733812号公報Japanese Patent No. 5733812 特許第5722714号公報Japanese Patent No. 5722714

本発明はこのような問題を解決し、例えば補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえる、コンクリート構造物の剥落防止シ−トおよびコンクリート構造物の剥落防止工法を提供することを目的とする。 The present invention solves such a problem, and for example, even a worker who is inexperienced in repair work or a worker who does not have sufficient repair tools can easily and quickly take emergency measures against peeling of concrete. It is an object of the present invention to provide a concrete structure peeling prevention sheet and a concrete structure peeling prevention method.

請求項1の発明は、複数の繊維糸を交差して網状に配置した補強繊維を合成樹脂で含浸した薄厚シート状の補強樹脂シートを備え、該補強樹脂シートをコンクリート構造物の表面に固定したコンクリート構造物の剥落防止シートにおいて、前記補強樹脂シートの表面に耐候性を付与し、補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着し、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定し、補強樹脂シートの表面の耐候性によってトップコートの塗布を省くとともに、補強樹脂シートの他側面に軟質の粘着材を被着した粘着シートを一体に接着または熱融着し、コンクリート構造物の表面に粘着シートを密着して容易かつ速やかに行なえ、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえるようにしている。 The invention of claim 1 comprises a thin sheet-like reinforcing resin sheet impregnated with a synthetic resin of reinforcing fibers arranged in a net shape by crossing a plurality of fiber threads, and the reinforcing resin sheet is fixed to the surface of a concrete structure. In the peeling prevention sheet of the concrete structure, the surface of the reinforcing resin sheet is provided with weather resistance, and the adhesive sheet having a soft adhesive layer adhered to the other side surface of the reinforcing resin sheet is integrally adhered or heat-sealed. The reinforcing resin sheet was fixed to the surface of the concrete structure via the adhesive sheet, the application of the top coat was omitted due to the weather resistance of the surface of the reinforcing resin sheet, and a soft adhesive material was adhered to the other side surface of the reinforcing resin sheet. The adhesive sheet is integrally adhered or heat-sealed, and the adhesive sheet can be easily and quickly adhered to the surface of the concrete structure, and the repair work skill is inexperienced or the work is not equipped with sufficient repair tools. Even people can easily and quickly take emergency measures against the peeling of concrete.

請求項2の発明は、補強樹脂シートを接着剤を介してコンクリート構造物の表面に接着し、粘着シートの代わりに、例えばエポキシ樹脂系の接着剤を用いて、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえるようにしている。 The invention of claim 2 is an operation in which a reinforcing resin sheet is adhered to the surface of a concrete structure via an adhesive, and an epoxy resin-based adhesive is used instead of the adhesive sheet, for example, and the repair work skill is inexperienced. Even workers and workers who do not have sufficient repair tools can easily and quickly take emergency measures against concrete peeling.

請求項3の発明は、補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着樹脂シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着層を被着した粘着シートからなり、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定し、施工時の基材樹脂シートの弾力性を有する合成樹脂シートによって、粘着シートの貼り付け時の補強樹脂シートにする押圧力を粘着シートへ確実かつ精密に伝え、粘着シートの貼り付けを容易かつ緻密に行なえるようにしている。 In the invention of claim 3, the adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive resin sheet is bonded or heat-sealed to one side surface of the synthetic resin sheet having elasticity. It consists of an adhesive sheet coated with a soft adhesive layer, and the reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive sheet, and is adhered by the synthetic resin sheet having the elasticity of the base resin sheet at the time of construction. The pressing force for the reinforcing resin sheet when the sheet is attached is reliably and precisely transmitted to the adhesive sheet so that the adhesive sheet can be attached easily and precisely.

請求項4の発明は、補強樹脂シートは、所定荷重を短時間載荷した際の最大荷重が所定値以上で、所定荷重を長時間載荷後の変位量が所定値以内であり、補強樹脂シートに対し、コンクリート剥落片の載荷時に耐えられる最大荷重の最小値と、所定荷重を長時間載荷後の変位量の最大値を規制し、コンクリートの剥落防止性能を具体的に規定し、剥落防止性能の向上を図って施工上の安全性を確保するようにしている。 According to the invention of claim 4, the reinforcing resin sheet has a maximum load of a predetermined value or more when a predetermined load is loaded for a short time, and a displacement amount after loading the predetermined load for a long time is within a predetermined value. On the other hand, the minimum value of the maximum load that can be withstood when loading concrete peeling pieces and the maximum value of the displacement after loading a predetermined load for a long time are regulated, and the concrete peeling prevention performance is specifically specified. We are trying to improve it to ensure construction safety.

請求項5の発明は、補強樹脂シートは、短時間載荷時の最大荷重が1.5kN以上で、
長時間載荷時の載荷荷重が0.3kNで、該載荷荷重を7日載荷時の変位量が15mm以
内であり、各規制値を具体化しコンクリートの剥落防止性能の指標を形成するようにして
いる。
According to the invention of claim 5, the reinforcing resin sheet has a maximum load of 1.5 kN or more when loaded for a short time.
The loading load during long-term loading is 0.3 kN, the displacement amount during 7-day loading is within 15 mm, and each regulation value is embodied to form an index of concrete peeling prevention performance. ..

請求項6の発明は、補強樹脂シートはポリオレフィン製繊維糸を縦0.05〜0.25mm、横0.23〜0.43mm、横/縦の比(扁平度)が1.5超の矩形断面に形成し、該繊維糸の2軸を目合い1.06〜1.08mm、開口率は35%以上であることが好ましく、開口率の上限は70%以下が好ましく、該繊維糸をアクリル樹脂で含浸して、補強樹脂シートを強固に構成するようにしている。 According to the invention of claim 6, the reinforcing resin sheet is a rectangular fiber yarn made of polyolefin having a length of 0.05 to 0.25 mm, a width of 0.23 to 0.43 mm, and a width / height ratio (flatness) of more than 1.5. It is preferably formed on a cross section, the two axes of the fiber yarn have a mesh size of 1.06 to 1.08 mm, the aperture ratio is preferably 35% or more, the upper limit of the aperture ratio is preferably 70% or less, and the fiber yarn is made of acrylic. It is impregnated with resin so that the reinforcing resin sheet is firmly formed.

請求項7の発明は、複数の繊維糸を交差して網状に配置した繊維シートを合成樹脂で含浸した薄厚のシート状の補強樹脂シートを備え、該補強樹脂シートをコンクリート構造物の表面に固定するコンクリート構造物の剥落防止工法において、前記補強樹脂シートの一側面は耐候性を備え、補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着し、コンクリート構造物の表面の下地をアセトン等の有機溶媒で拭き取り処理し、該下地処理後、コンクリート構造物の表面に前記粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定し、補強樹脂シートの表面の耐候性によってトップコートの塗布を省き、また補強樹脂シートの他側面に軟質の粘着材を被着した粘着シートを一体に接着または熱融着して、コンクリート構造物の表面に粘着シートを密着して施工するとともに、コンクリート構造物の表面の下地をアセトン等の有機溶媒で拭き取り処理して、従来のサンドペ−パやブラシ、電動工具を駆使した煩雑な下地ケレンをなくし、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえるようにしている。 The invention of claim 7 comprises a thin sheet-like reinforcing resin sheet impregnated with a synthetic resin by fiber sheets arranged in a net shape by crossing a plurality of fiber threads, and the reinforcing resin sheet is fixed to the surface of a concrete structure. In the method of preventing the concrete structure from peeling off, one side surface of the reinforcing resin sheet has weather resistance, and an adhesive sheet having a soft adhesive layer adhered to the other side surface of the reinforcing resin sheet is integrally adhered or heat-sealed. The base of the surface of the concrete structure is wiped with an organic solvent such as acetone, and after the base treatment, the reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive sheet, and the reinforcing resin is fixed to the surface of the concrete structure. The weather resistance of the surface of the sheet eliminates the application of the top coat, and an adhesive sheet with a soft adhesive material adhered to the other side of the reinforcing resin sheet is integrally adhered or heat-sealed to adhere to the surface of the concrete structure. The sheet is installed in close contact, and the base of the surface of the concrete structure is wiped off with an organic solvent such as acetone to eliminate the complicated base cleaning that makes full use of conventional sandpaper, brushes, and electric tools, and repair work. Even workers who are inexperienced in their skills or who do not have sufficient repair tools can easily and quickly take emergency measures against peeling of concrete.

請求項8の発明は、補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着材を被着した粘着シートとからなり、該粘着層を介して補強樹脂シートをコンクリート構造物の表面に固定し、弾力性を有する合成樹脂シートによって、施工時の補強樹脂シートに対する押圧力を粘着シートへ確実かつ精密に伝え、粘着シートの貼り付けを容易かつ緻密に行なえるようにしている。 In the invention of claim 8, the adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive sheet is a soft synthetic resin sheet having elasticity and bonded or heat-sealed to one side surface of the synthetic resin sheet. The reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive layer, and the elastic synthetic resin sheet presses the reinforcing resin sheet against the reinforcing resin sheet during construction. Is transmitted to the adhesive sheet reliably and precisely so that the adhesive sheet can be attached easily and precisely.

請求項1の発明は、補強樹脂シートの表面に耐候性を付与し、補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着し、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定したから、補強樹脂シートの表面の耐候性によってトップコ−トの塗布を省けるとともに、補強樹脂シートの他側面に軟質の粘着材を被着した粘着シートを一体に接着または熱融着し、コンクリート構造物の表面に粘着シートを密着して容易かつ速やかに行なうことができ、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なうことができる。 The invention of claim 1 imparts weather resistance to the surface of the reinforcing resin sheet, and integrally adheres or heat-seals an adhesive sheet having a soft adhesive layer adhered to the other side surface of the reinforcing resin sheet to obtain the adhesive sheet. Since the reinforced resin sheet is fixed to the surface of the concrete structure via the reinforced resin sheet, the coating of the top coat can be omitted due to the weather resistance of the surface of the reinforced resin sheet, and the adhesive with a soft adhesive material adhered to the other side surface of the reinforced resin sheet. The sheets can be integrally adhered or heat-sealed, and the adhesive sheet can be easily and quickly adhered to the surface of the plastic structure, and it is equipped with workers who are inexperienced in repair work and sufficient repair tools. Even an unemployed worker can easily and quickly take emergency measures against the peeling of plastic.

請求項2の発明は、補強樹脂シートを接着剤を介してコンクリート構造物の表面に接着したから、粘着シートの代わりに、例えばエポキシ樹脂系の接着剤を用いて、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なうことができる。 In the invention of claim 2, since the reinforcing resin sheet is adhered to the surface of the concrete structure via an adhesive, the repair work skill is immature by using, for example, an epoxy resin adhesive instead of the adhesive sheet. Even workers and workers who do not have sufficient repair tools can easily and quickly take emergency measures against the peeling of concrete.

請求項3の発明は、補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着層を被着し、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定したから、施工時の基材樹脂シートの弾力性を有する合成樹脂シートによって、補強樹脂シートに対する押圧力を粘着シートへ確実かつ精密に伝え、粘着シートの貼り付けを容易かつ緻密に行なうことができる。 According to the third aspect of the present invention, the adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive sheet is a soft synthetic resin sheet having elasticity and bonded or heat-sealed to one side surface of the synthetic resin sheet. Since the adhesive layer of the above was adhered and the reinforcing resin sheet was fixed to the surface of the concrete structure via the adhesive sheet, the reinforcing resin sheet was pressed by the synthetic resin sheet having the elasticity of the base resin sheet at the time of construction. The pressure can be reliably and precisely transmitted to the adhesive sheet, and the adhesive sheet can be easily and precisely attached.

請求項4の発明は、補強樹脂シートは、所定荷重を短時間載荷した際の最大荷重が所定値以上で、所定荷重を長時間載荷後の変位量が所定値以内であるから、補強樹脂シートに対し、コンクリート剥落片の載荷時に耐えられる最大荷重の最小値と、所定荷重を長時間載荷後の変位量の最大値を規制し、コンクリートの剥落防止性能を具体的に規定し、剥落防止性能の向上を図って施工上の安全性を確保することができる。 According to the invention of claim 4, the reinforcing resin sheet has a maximum load of a predetermined value or more when a predetermined load is loaded for a short time and a displacement amount of a predetermined load after being loaded for a long time is within a predetermined value. On the other hand, the minimum value of the maximum load that can be withstood when loading concrete peeling pieces and the maximum value of the displacement after loading a predetermined load for a long time are regulated, and the concrete peeling prevention performance is specifically specified, and the peeling prevention performance. It is possible to secure the safety in construction by improving the above.

請求項5の発明は、補強樹脂シートは、短時間載荷時の最大荷重が1.5kN以上で、
長時間載荷時の載荷荷重が0.3kNで、該載荷荷重を7日載荷時の変位量が15mm以
内であるから、各規制値を具体化しコンクリートの剥落防止性能の指標を形成することができる。
According to the invention of claim 5, the reinforcing resin sheet has a maximum load of 1.5 kN or more when loaded for a short time.
Since the loaded load during long-term loading is 0.3 kN and the displacement amount during 7-day loading is within 15 mm, each regulation value can be embodied and an index of concrete peeling prevention performance can be formed. ..

請求項6の発明は、補強樹脂シートはポリオレフィン製繊維糸を縦0.05〜0.25mm、横0.23〜0.43mm、横/縦の比(扁平度)が1.5超の矩形断面に形成し、該繊維糸の2軸を目合い1.06〜1.08mm、開口率は35%以上であることが好ましく、開口率の上限は70%以下が好ましく、該繊維糸をアクリル樹脂で含浸して、補強樹脂シートを強固に構成することができる。 According to the invention of claim 6, the reinforcing resin sheet is a rectangular fiber yarn made of polyolefin having a length of 0.05 to 0.25 mm, a width of 0.23 to 0.43 mm, and a width / height ratio (flatness) of more than 1.5. It is preferably formed on a cross section, the two axes of the fiber yarn have a mesh size of 1.06 to 1.08 mm, the aperture ratio is preferably 35% or more, the upper limit of the aperture ratio is preferably 70% or less, and the fiber yarn is made of acrylic. The reinforcing resin sheet can be firmly formed by impregnating with a resin.

請求項7の発明は、補強樹脂シートの一側面は耐候性を備え、補強樹脂シートの他側面に軟質の粘着材を被着した粘着シートを一体に接着または熱融着し、コンクリート構造物の表面の下地をアセトン等の有機溶媒で拭き取り処理し、該下地処理後、コンクリート構造物の表面に前記粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定するから、補強樹脂シートの表面の耐候性によってトップコ−トの塗布を省け、また補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着して、コンクリート構造物の表面に粘着シートを密着して施工できるとともに、コンクリート構造物の表面の下地をアセトン等の有機溶媒で拭き取り処理して、従来のサンドペ−パやブラシ、電動工具を駆使した煩雑な下地ケレンをなくし、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なうことができる。 According to the invention of claim 7, one side surface of the reinforcing resin sheet has weather resistance, and an adhesive sheet having a soft adhesive material adhered to the other side surface of the reinforcing resin sheet is integrally adhered or heat-sealed to form a concrete structure. The base of the surface is wiped off with an organic solvent such as acetone, and after the base treatment, the reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive sheet, so that the surface of the reinforcing resin sheet is fixed. The weather resistance of the top coat can be omitted, and the adhesive sheet with a soft adhesive layer on the other side of the reinforcing resin sheet is integrally adhered or heat-sealed to attach the adhesive sheet to the surface of the concrete structure. In addition to being able to work in close contact, the groundwork on the surface of the concrete structure is wiped off with an organic solvent such as acetone to eliminate the complicated groundwork cleaning that makes full use of conventional sandpaper, brushes, and electric tools, and the skill of repair work. Even inexperienced workers and workers who do not have sufficient repair tools can easily and quickly take emergency measures against concrete peeling.

請求項8の発明は、補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着材を被着した粘着層とからなり、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定するから、弾力性を有する合成樹脂シートによって、施工時の補強樹脂シートに対する押圧力を粘着シートへ確実かつ精密に伝え、粘着シートの貼り付けを容易かつ緻密に行なうことができる。 In the invention of claim 8, the adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive sheet is a soft synthetic resin sheet having elasticity and bonded or heat-sealed to one side surface of the synthetic resin sheet. Since the reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive sheet, which is composed of an adhesive layer coated with the adhesive material of the above, the elastic synthetic resin sheet is used to push the reinforcing resin sheet against the reinforcing resin sheet during construction. The pressure can be reliably and precisely transmitted to the adhesive sheet, and the adhesive sheet can be easily and precisely attached.

本発明による補強樹脂シートの施工状況を示す断面図である。It is sectional drawing which shows the construction state of the reinforcing resin sheet by this invention. 本発明に適用した補強繊維の概要を示す拡大図で、アクリル樹脂による含浸部を省略して示している。In the enlarged view which shows the outline of the reinforcing fiber applied to this invention, the impregnated part by an acrylic resin is omitted. 本発明に適用した補強繊維の性状を示す表である。It is a table which shows the property of the reinforcing fiber applied to this invention. 本発明に適用した補強樹脂シートの施工状況を示す断面図で、粘着シートの食い込み状況を、粘着材が軟質の場合(a)と、硬質の場合に(b)に分けて拡大して示している。In the cross-sectional view showing the construction status of the reinforcing resin sheet applied to the present invention, the biting condition of the adhesive sheet is enlarged and shown in the case where the adhesive material is soft (a) and when the adhesive material is hard (b). There is.

本発明の補強樹脂シートに対する押し抜き試験状況を示す断面図である。It is sectional drawing which shows the punching test situation with respect to the reinforcing resin sheet of this invention. 上記押し抜き試験結果を示すグラフで、載荷荷重と変位の状況を示しているThe graph showing the punching test results shows the load and displacement status. 本発明の補強樹脂シートの貼り付け工法の要部を拡大して示す説明図で、(a)はコンクリート構造物の表面をアセトンを染み込ませたウェスで拭き取る下地処理を示し、(b)は補強樹脂シートの貼付けローラによる貼り付け作業状況を示し、(c)は補強樹脂シートの貼り付け後の脱泡ローラによる脱泡作業状況を示しているIn the explanatory view which shows the main part of the method of pasting the reinforcing resin sheet of this invention in an enlarged manner, (a) shows the base treatment which wipes the surface of a concrete structure with a waste cloth soaked with acetone, and (b) is reinforcement. The sticking work situation by the sticking roller of a resin sheet is shown, and (c) shows the defoaming work situation by a defoaming roller after sticking a reinforcing resin sheet.

以下、本発明を図示の実施形態について説明すると、図1乃至図7において1は建築物、橋梁、トンネル等のコンクリート構造物で、その要補修部の表面に剥落防止シートである薄厚の補強シート2が貼り付けられている。
前記補強シート2は、補強樹脂シート3と、該補強樹脂シート3の一側に接着または熱融着して一体に固定した粘着シート4とからなり、該粘着シート4をコンクリート構造物1の表面に貼り付けて要補修部を補強し、コンクリート剥落片の剥落を防止可能にしている。
Hereinafter, the illustrated embodiment of the present invention will be described. In FIGS. 1 to 7, reference numeral 1 denotes a concrete structure such as a building, a bridge, a tunnel, etc., and a thin reinforcing sheet which is a peeling prevention sheet on the surface of a portion requiring repair. 2 is pasted.
The reinforcing sheet 2 is composed of a reinforcing resin sheet 3 and an adhesive sheet 4 which is adhered or heat-sealed to one side of the reinforcing resin sheet 3 and fixed integrally, and the adhesive sheet 4 is attached to the surface of the concrete structure 1. It is attached to the to reinforce the part requiring repair, making it possible to prevent the concrete peeling pieces from peeling off.

前記補強樹脂シート3は薄厚のシート状に成型され、その厚さは0.25〜0.45mmに形成されていて、その内部にポリオレフィン製繊維の縦糸5と横糸6を直交配置し、これらを目合い1.06〜1.08mm、開口率35〜70%、の16〜19メッシュに配列していて、前記縦糸5と横糸6とを基材樹脂であるアクリル樹脂7で含浸してラミネートし、その表面に耐候性を付与し、その色見を灰色に構成している。
前記縦糸5および横糸6の断面は、縦0.05〜0.25mm、横0.23〜0.43mm、横/縦の比(扁平度)が1.5超の矩形断面に形成され、この2軸を直交配置して図2のようにメッシュ状に配列している。
The reinforcing resin sheet 3 is molded into a thin sheet shape, the thickness thereof is 0.25 to 0.45 mm, and the warp threads 5 and the weft threads 6 of polyolefin fibers are arranged orthogonally inside the reinforcing resin sheet 3 and these are arranged in an orthogonal manner. They are arranged in 16 to 19 meshes with a mesh size of 1.06 to 1.08 mm and an aperture ratio of 35 to 70%, and the warp threads 5 and weft threads 6 are impregnated with acrylic resin 7 which is a base resin and laminated. , The surface is given weather resistance, and its color is gray.
The cross section of the warp 5 and the weft 6 is formed into a rectangular cross section having a length of 0.05 to 0.25 mm, a width of 0.23 to 0.43 mm, and a width / length ratio (flatness) of more than 1.5. The two axes are arranged orthogonally and arranged in a mesh shape as shown in FIG.

前記粘着シート4は軟質のアクリル系粘着材を補強樹脂シート3に被着し、該粘着シート4をコンクリート構造物1の表面に貼り付けた際、図4のようにコンクリート構造物1の表面の凹凸を許容して凹部に進入し、気泡の残留を防止して凹凸部に対する良好な食い込みを得られ、コンクリート構造物1の表面に強固に密着し得るようにしている。 When the adhesive sheet 4 has a soft acrylic adhesive material adhered to the reinforcing resin sheet 3 and the adhesive sheet 4 is attached to the surface of the concrete structure 1, the surface of the concrete structure 1 is as shown in FIG. The unevenness is allowed to enter the concave portion, the residual air bubbles are prevented, good bite into the uneven portion can be obtained, and the concrete structure 1 can be firmly adhered to the surface.

前記粘着シート4は、補強樹脂シート3の一側に接着または熱融着して一体に固定され、その内側に特殊発泡ポリエステルフォーム等の弾力性を有する合成樹脂シート8を備え、その厚さを約0.5〜0.7mmで、その両側に軟質の粘着層9を接着または熱融着して固定している。 The adhesive sheet 4 is integrally fixed to one side of the reinforcing resin sheet 3 by adhesive or heat fusion, and a synthetic resin sheet 8 having elasticity such as a special foamed polyester foam is provided inside the adhesive sheet 4 to increase the thickness thereof. It is about 0.5 to 0.7 mm, and soft adhesive layers 9 are adhered or heat-sealed to be fixed on both sides thereof.

前記合成樹脂シート8の両側面に、前記粘着層9を接着または熱融着して固定し、該粘着層9を前記粘着シート4と同様の軟質のアクリル系粘着材で構成し、その一方の粘着層9をコンクリート構造物の表面に固定している。
この場合、粘着シート4をアクリル系粘着材で構成する代わりに、エポキシ系接着材を用いてコンクリート構造物1の表面に貼り付けても良く、そのようにすることで補強シート2を強固に密着し得る。
The pressure-sensitive adhesive layer 9 is adhered or heat-sealed and fixed to both side surfaces of the synthetic resin sheet 8, and the pressure-sensitive adhesive layer 9 is made of a soft acrylic pressure-sensitive adhesive material similar to that of the pressure-sensitive adhesive sheet 4. The adhesive layer 9 is fixed to the surface of the concrete structure.
In this case, instead of the adhesive sheet 4 being made of an acrylic adhesive, an epoxy adhesive may be used to attach the adhesive sheet 4 to the surface of the concrete structure 1, and by doing so, the reinforcing sheet 2 is firmly adhered. Can be done.

実施形態では、合成樹脂シート8が弾力性を有するため、粘着シート4を押圧してコンクリート構造物1の要補修部表面に接着または粘着する際、合成樹脂シート8の弾力によって、補強樹脂シート3側の押圧力を合成樹脂シート8の弾力によって、コンクリート構造物1側の粘着シート4に確実かつ緻密に伝え、粘着シート4をコンクリート構造物1の表面に強固かつ密着して固定可能にしている。
しかも、粘着シート4は一側面に被着した粘着層9がコンクリート構造物1の表面の凹凸を許容して食い込み、良好に密着して貼り付けられる。
In the embodiment, since the synthetic resin sheet 8 has elasticity, when the adhesive sheet 4 is pressed to adhere to or adhere to the surface of the repair-required portion of the concrete structure 1, the elasticity of the synthetic resin sheet 8 causes the reinforcing resin sheet 3 to adhere. The pressing force on the side is reliably and precisely transmitted to the adhesive sheet 4 on the concrete structure 1 side by the elasticity of the synthetic resin sheet 8, and the adhesive sheet 4 can be firmly and closely adhered to the surface of the concrete structure 1 and fixed. ..
Moreover, the adhesive layer 9 adhered to one side surface of the adhesive sheet 4 allows unevenness on the surface of the concrete structure 1 and bites into the adhesive sheet 4, so that the adhesive sheet 4 is attached in good contact with the adhesive sheet 4.

発明者は、コンクリート剥落防止の施工の安全性を確保するため、補強シート2が実際にコンクリート剥落防止の機能を果たすか否かの適性試験を行なった。
前記試験は、短期荷重負荷試験と長期荷重負荷試験に分かれ、前者は補強シート2がコンクリート剥落片の載荷時に、どの程度の荷重に耐えられるか否かの試験であり、後者は
、短時間での試験では相応の剥離荷重を保持可能であっても、長時間の負荷や気温変化で剥離範囲が広がり、想定した剥落塊を保持できなくなる可能性があることに鑑み、短期荷重負荷試験を補完する目的で行なう。
The inventor conducted an aptitude test on whether or not the reinforcing sheet 2 actually fulfills the function of preventing concrete peeling in order to ensure the safety of the concrete peeling prevention construction.
The test is divided into a short-term load load test and a long-term load load test. The former is a test of how much load the reinforcing sheet 2 can withstand when the concrete exfoliated pieces are loaded, and the latter is a test in a short time. In this test, even if a suitable peeling load can be maintained, the peeling range may expand due to a long-term load or temperature change, and it may not be possible to hold the expected peeling mass, so the short-term load load test is complemented. Do it for the purpose of doing.

すなわち、補強シート2は、短期荷重負荷試験における最大荷重が一定以上、実施形態では1.5kN以上で、長期荷重負荷試験では一定の載荷荷重を一定期間、載荷した際の
変位量が一定以内、実施形態では0.3kNの載荷荷重を7日間載荷した際の変位量が1
5mm以内であれば、適性有りと判定している。
That is, the reinforcing sheet 2 has a maximum load of a certain value or more in the short-term load test, 1.5 kN or more in the embodiment, and a displacement amount when a constant load is applied for a certain period of time in the long-term load test. In the embodiment, the displacement amount when a load of 0.3 kN is loaded for 7 days is 1.
If it is within 5 mm, it is judged to be suitable.

前記荷重負荷試験はJSCE−K533の試験方法に準拠して押し抜き試験を行ない、試験体10として、上蓋式U型側溝の呼称300の中央部裏面から100Φのコア11を刳り貫いたものを使用し、該試験体10の表面を有機溶媒であるアセトンの付いたウェスで拭き取り、試験体10の下面に補強樹脂シート3と粘着シート4を一体に構成した補強シ−ト2を貼り付け、1時間養生させる。 In the load load test, a punching test was performed in accordance with the test method of JSCE-K533, and the test piece 10 used was a 100Φ core 11 hollowed out from the back surface of the central portion of the nominal 300 of the upper lid type U-shaped gutter. Then, the surface of the test body 10 is wiped with a waste cloth having acetone as an organic solvent, and the reinforcing sheet 2 in which the reinforcing resin sheet 3 and the adhesive sheet 4 are integrally formed is attached to the lower surface of the test body 10. Let it cure for a while.

その後、前記コア11に押し抜き棒12を挿入し、該押し抜き棒12の下端部を補強シート2の上面に押し当て、押し抜き棒12の上端部に所定荷重、実施形態では30kgの錘13を載せて補強シート2に負荷し、該補強シート2のコンクリート構造物1からの剥離の有無と、補強シート2の下方への変位を観察し、剥離時における変位δと最大荷重を測定して、変位が収束した時点、若しくは押し抜き棒12が抜け落ちた時点で終了する。 After that, the push-out rod 12 is inserted into the core 11, the lower end portion of the push-out rod 12 is pressed against the upper surface of the reinforcing sheet 2, and a predetermined load is applied to the upper end portion of the push-out rod 12, a weight 13 of 30 kg in the embodiment. Was placed on the reinforcing sheet 2 and loaded, and the presence or absence of peeling of the reinforcing sheet 2 from the concrete structure 1 and the downward displacement of the reinforcing sheet 2 were observed, and the displacement δ and the maximum load at the time of peeling were measured. , It ends when the displacement converges or when the push-out rod 12 comes off.

前記長期荷重負荷試験は、短期荷重負荷試験と略同様な要領で行い、0.3kNの錘1
3を7日間載荷し、補強シート2のコンクリート構造物1からの剥離の有無と、補強シート2の下方への変位を観察し、7日間経過時の変位量を測定した時点、若しくは押し抜き棒12が抜け落ちた時点で終了する。
The long-term load test is performed in substantially the same manner as the short-term load test, and the weight 1 of 0.3 kN is used.
3 was loaded for 7 days, the presence or absence of peeling of the reinforcing sheet 2 from the concrete structure 1 and the downward displacement of the reinforcing sheet 2 were observed, and the amount of displacement after 7 days was measured, or the punching rod. It ends when 12 is dropped out.

このように構成した本発明のコンクリート構造物の剥落防止シートは、補強樹脂シート3を主体とする補強シート2の製作を要する。
前記補強シート2は、表面側に配置する補強樹脂シート3と、該補強樹脂シート3の一側面に接着または熱融着して一体にした粘着シート4とからなり、これらを重合して薄厚のシート状に構成し、その内部に補強繊維を配置する。
前記補強樹脂シート3は0.25〜0.45mmの厚さに成型し、その表面に適宜な剥離紙を被着して保護し、また粘着シート4の粘着面に剥離紙を被着して粘着面を保護する。
The exfoliation prevention sheet of the concrete structure of the present invention configured in this way requires the production of the reinforcing sheet 2 mainly composed of the reinforcing resin sheet 3.
The reinforcing sheet 2 is composed of a reinforcing resin sheet 3 arranged on the surface side and an adhesive sheet 4 which is adhered or heat-sealed to one side surface of the reinforcing resin sheet 3 and integrated, and these are polymerized to form a thin thickness. It is configured in a sheet shape, and reinforcing fibers are arranged inside the sheet.
The reinforcing resin sheet 3 is molded to a thickness of 0.25 to 0.45 mm, and an appropriate release paper is adhered to the surface thereof to protect the reinforcing resin sheet 3, and the adhesive surface of the adhesive sheet 4 is coated with the release paper. Protects the adhesive surface.

前記補強樹脂シート3は、内部にポリオレフィン製繊維の縦糸5と横糸6を直交配置し、これらを目合い1.06〜1.08mm、開口率35〜70%、の16〜19メッシュに配列した補強繊維を配置し、その縦糸5と横糸6とを基材樹脂であるアクリル樹脂7で含浸してラミネートし、その表面に耐候性を付与し、その色見を灰色に構成している。 In the reinforcing resin sheet 3, warp threads 5 and weft threads 6 of polyolefin fibers are arranged orthogonally inside, and these are arranged in a 16 to 19 mesh having a mesh size of 1.06 to 1.08 mm and an opening ratio of 35 to 70%. Reinforcing fibers are arranged, and the warp threads 5 and the weft threads 6 are impregnated with acrylic resin 7 which is a base material and laminated to impart weather resistance to the surface thereof, and the color appearance is made gray.

前記縦糸5および横糸6の断面は、縦0.05〜0.25mm、横0.23〜0.43mm、横/縦の比(扁平度)が1.5超の矩形断面に形成され、この2軸を直交配置して図2のようにメッシュ状に配列している。 The cross section of the warp 5 and the weft 6 is formed into a rectangular cross section having a length of 0.05 to 0.25 mm, a width of 0.23 to 0.43 mm, and a width / length ratio (flatness) of more than 1.5. The two axes are arranged orthogonally and arranged in a mesh shape as shown in FIG.

前記粘着シート4は軟質のアクリル系粘着材を補強樹脂シート3に被着し、該粘着シート4は両側面に柔軟な粘着層9を被着していて、一方の粘着層9をコンクリート構造物1の表面に貼り付けた際、粘着層9が図4のようにコンクリート構造物1の表面の凹凸を許容して凹部に進入し、気泡の残留を防止して凹凸部に対する良好な食い込みを形成し、コンクリート構造物1の表面に強固に密着する。 The adhesive sheet 4 has a soft acrylic adhesive material adhered to a reinforcing resin sheet 3, the adhesive sheet 4 has flexible adhesive layers 9 coated on both side surfaces, and one adhesive layer 9 is a concrete structure. When attached to the surface of No. 1, the adhesive layer 9 allows unevenness on the surface of the concrete structure 1 and enters the recess as shown in FIG. 4, preventing residual air bubbles and forming a good bite into the uneven portion. Then, it adheres firmly to the surface of the concrete structure 1.

こうして製作した補強樹脂シート3を主体とする補強シート2に対し、コンクリート剥
落防止の施工の安全性を確保するため、コンクリート剥落防止の機能を果たすか否かの適性試験を行なう。
In order to ensure the safety of the concrete peeling prevention construction, the aptitude test is performed on the reinforcing sheet 2 mainly composed of the reinforcing resin sheet 3 produced in this way to see if it fulfills the concrete peeling prevention function.

前記適性試験は、短期荷重負荷試験と長期荷重負荷試験に分かれ、前者は補強シート2がコンクリート剥落片の載荷時に、どの程度の荷重に耐えられるか否かの試験であり、後者は、短時間での試験では相応の剥離荷重を保持可能であっても、長時間の負荷や気温変化で剥離範囲が広がり、想定した剥落塊を保持できなくなる可能性があることに鑑み、短期荷重負荷試験を補完する目的で行なう。 The aptitude test is divided into a short-term load test and a long-term load test. The former is a test of how much load the reinforcing sheet 2 can withstand when a concrete stripped piece is loaded, and the latter is a short-time test. In the test in, even if it is possible to hold a suitable peeling load, the peeling range may expand due to a long-term load or temperature change, and it may not be possible to hold the expected peeling mass. It is done for the purpose of complementing.

すなわち、補強シート2は、短期荷重負荷試験における最大荷重が一定以上、実施形態では1.5kN以上で、長期荷重負荷試験では一定の載荷荷重を一定期間、載荷した際の
変位量が一定以内、実施形態では0.3kNの載荷荷重を7日間載荷した際の変位量が、
発明者の知見と過去の経験を基に15mm以内であれば、適性有りと判定する。
That is, the reinforcing sheet 2 has a maximum load of a certain value or more in the short-term load test, 1.5 kN or more in the embodiment, and a displacement amount when a constant load is applied for a certain period of time in the long-term load test. In the embodiment, the displacement amount when a loaded load of 0.3 kN is loaded for 7 days is
Based on the inventor's knowledge and past experience, if it is within 15 mm, it is judged to be suitable.

前記荷重負荷試験は試験体10として、上蓋式U型側溝の呼称300の中央部裏面から100Φのコア11を抜いたものを使用し、該試験体10の表面をアセトンを染み込ませたウェスで塵埃や油分を拭き取り、その清浄面に粘着シート4を貼り付けて補強シート2を取り付け、1時間養生させる。 In the load-load test, a test body 10 was used in which a 100Φ core 11 was removed from the back surface of the central portion of a nominal 300 upper lid type U-shaped side groove, and the surface of the test body 10 was dusted with a waste cloth impregnated with acetone. Wipe off oil and oil, attach the adhesive sheet 4 to the clean surface, attach the reinforcing sheet 2, and let it cure for 1 hour.

その後、前記コア11に押し抜き棒12を挿入し、押し抜き棒12の下端部を補強シート2の上面に押し当て、押し抜き棒12の上端部に所定荷重、実施形態では30kgの錘13を載せて補強シート2に負荷し、補強シート2の剥離開始に伴う下方への変位を観察し、荷重と変位δを連続的に記録し、変位が収束した時点、若しくは押し抜き棒12が抜け落ちた時点で終了する。 After that, the push-out rod 12 is inserted into the core 11, the lower end portion of the push-out rod 12 is pressed against the upper surface of the reinforcing sheet 2, and a predetermined load is applied to the upper end portion of the push-out rod 12, a weight 13 of 30 kg in the embodiment. It was placed and loaded on the reinforcing sheet 2, the downward displacement of the reinforcing sheet 2 was observed at the start of peeling, the load and the displacement δ were continuously recorded, and when the displacement converged, or the push-out rod 12 fell off. It ends at that point.

補強シート2の短期荷重負荷試験は図6のようで、変位が10〜30mm付近で補強シート2から頻繁に異音が発生し、荷重の変化を確認したが、変位が30mmを超えると前述の変化は余り見られず、最終的に最大荷重2.01kN、その際の変位49.9mmを測定した。
前記最大荷重2.01kNは、規定値が1.5kN以上であるから、短期荷重負荷試験を合格したことが確認された。
The short-term load test of the reinforcing sheet 2 is as shown in FIG. 6, and when the displacement is around 10 to 30 mm, abnormal noise is frequently generated from the reinforcing sheet 2 and the change in the load is confirmed. However, when the displacement exceeds 30 mm, the above-mentioned There was not much change, and finally the maximum load of 2.01 kN and the displacement of 49.9 mm at that time were measured.
Since the specified value of the maximum load of 2.01 kN is 1.5 kN or more, it was confirmed that the short-term load test was passed.

一方、前記長期荷重負荷試験は、短期荷重負荷試験と略同様な試験設備の下で、0.3
kNの錘13を7日間載荷し、その間の補強シート2のコンクリート構造物1からの剥離の有無と、補強シート2の下方への変位を観察し、7日間経過時の変位量を測定した時点、若しくは押し抜き棒12が抜け落ちた時点で終了した。
On the other hand, the long-term load test is 0.3 under the same test equipment as the short-term load test.
When the weight 13 of kN was loaded for 7 days, the presence or absence of peeling of the reinforcing sheet 2 from the concrete structure 1 and the downward displacement of the reinforcing sheet 2 were observed during that period, and the amount of displacement after 7 days was measured. Or, it ended when the push-out rod 12 fell off.

実際の長期荷重負荷試験では、7日間経過時の変位量が11mmで、規定値の15mm以下であるから、長期荷重負荷試験を合格したことが確認された。
すなわち、補強シート2は、短期荷重負荷試験と長期荷重負荷試験を合格し、所定の剥落防止性能を備えていることが確認され、剥落防止の適性有りと判定されたので、当該補強シート2による施工が可能になる。
In the actual long-term load test, the displacement amount after 7 days was 11 mm, which was 15 mm or less of the specified value, so it was confirmed that the long-term load test was passed.
That is, the reinforcing sheet 2 has passed the short-term load test and the long-term load test, and it has been confirmed that the reinforcing sheet 2 has a predetermined peeling prevention performance, and it is determined that the reinforcing sheet 2 is suitable for peeling prevention. Construction becomes possible.

こうして剥落防止性能を確認された補強シート2を使用して、コンクリート構造物1の要補修部であるコンクリート剥落部を実際に補修する場合は、先ずコンクリート構造物1の要補修部を下地処理する。 When actually repairing the concrete peeling part, which is the repairable part of the concrete structure 1, by using the reinforcing sheet 2 whose peeling prevention performance has been confirmed in this way, first, the repairable part of the concrete structure 1 is grounded. ..

前記下地処理は、容器14に収納したアセトン等の有機溶媒の清浄液15をウェス16に染み込ませ、このウェス16によって要補修部の表面に付着した塵埃や油分を拭き取る
この状況は図7(a)のようである。
したがって、従来の下地処理における下地ケレンに多用されていた、やすりやサンドペーパ、電気研削工具の使用を廃し、煩雑な研磨作業や技量を要することなく、容易かつ速やかに行なえる。
In the base treatment, the waste cloth 15 is impregnated with a cleaning liquid 15 of an organic solvent such as acetone stored in the container 14, and the waste cloth 16 wipes off dust and oil adhering to the surface of the part requiring repair. This situation is shown in FIG. 7 (a). ).
Therefore, the use of a file, sandpaper, and electric grinding tool, which are often used for the base cleaning in the conventional base treatment, is eliminated, and the work can be performed easily and quickly without requiring complicated polishing work and skill.

次に、清浄した要補修部の表面に補強シート2を貼り付ける。
その際、補強シート2を所定の形状寸法に裁断し、補強樹脂シート3の表面の剥離紙(図示略)を剥がすとともに、粘着シート4の剥離紙(図示略)を剥がして、清浄後のコンクリート構造物1の要補修部表面に貼り付ける。
粘着シート4の貼り付け後、その表面に貼付けローラ17を転動操作して、補強樹脂シート3の表面を一様かつ安定して押圧し、粘着シート4を均一かつ平滑に貼付ける。この状況は図7(b)のようである。
Next, the reinforcing sheet 2 is attached to the surface of the cleaned repair-required portion.
At that time, the reinforcing sheet 2 is cut into a predetermined shape and size, the release paper (not shown) on the surface of the reinforcing resin sheet 3 is peeled off, and the release paper (not shown) of the adhesive sheet 4 is peeled off to clean the concrete. It is attached to the surface of the part requiring repair of the structure 1.
After the adhesive sheet 4 is attached, the application roller 17 is rolled on the surface of the adhesive sheet 4 to uniformly and stably press the surface of the reinforcing resin sheet 3 to apply the adhesive sheet 4 uniformly and smoothly. This situation is as shown in FIG. 7 (b).

この場合、補強樹脂シート3と粘着シート4とが一体に構成され、粘着シート4をコンクリート構造物1の表面に貼り付けることで、補強樹脂シート3の貼り付けを行なえるから、施工現場で補強樹脂シート3を粘着シート4に貼り付け、該粘着シート4をコンクリート構造物1の表面に貼り付けまたは接着する作業を省け、この作業を簡便かつ速やかに施工し得る。 In this case, the reinforcing resin sheet 3 and the adhesive sheet 4 are integrally formed, and the reinforcing resin sheet 3 can be attached by attaching the adhesive sheet 4 to the surface of the concrete structure 1, so that the reinforcing resin sheet 3 can be attached at the construction site. The work of sticking the resin sheet 3 to the adhesive sheet 4 and sticking or adhering the adhesive sheet 4 to the surface of the concrete structure 1 can be omitted, and this work can be carried out easily and quickly.

この後、前記貼付けた補強樹脂シート3の表面に脱泡ローラ18を転動操作して、補強樹脂3の表面を一様かつ安定して押圧し、コンクリート構造物1の表面と粘着シート4との間に残留する気泡を除去して、粘着シート4をコンクリート構造物1の表面に密着させる。この状況は図7(c)のようである。 After that, the defoaming roller 18 is rolled on the surface of the attached reinforcing resin sheet 3 to uniformly and stably press the surface of the reinforcing resin 3, and the surface of the concrete structure 1 and the adhesive sheet 4 are pressed. The air bubbles remaining between the two are removed, and the adhesive sheet 4 is brought into close contact with the surface of the concrete structure 1. This situation is as shown in FIG. 7 (c).

このように補強シート2の貼り付け作業は、特別な設備や工具、および特別の知識や技能、経験を要することなく簡単に作業し得るから、補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえる。 In this way, the work of attaching the reinforcing sheet 2 can be easily performed without requiring special equipment and tools, and special knowledge, skills, and experience. Therefore, it is sufficient for workers with inexperienced repair work skills. Even workers who do not have repair tools can easily and quickly take emergency measures against concrete peeling.

こうしてコンクリート構造物1の要補修部表面に、粘着シート4を介して補強樹脂シート3を貼り付けると、その粘着層9がコンクリート構造物1の表面に密着し、該コンクリート構造物1の剥落、または剥落片の落下を防止する。 When the reinforcing resin sheet 3 is attached to the surface of the repair-required portion of the concrete structure 1 via the adhesive sheet 4, the adhesive layer 9 adheres to the surface of the concrete structure 1 and the concrete structure 1 is peeled off. Or prevent the falling pieces from falling.

このように本発明のコンクリート構造物の剥落防止シ−トおよびコンクリート構造物の剥落防止工法は、例えば補修作業の技量が未熟な作業者や、十分な補修工具を備えていない作業者でも、コンクリートの応急的な剥落対策を容易かつ速やかに行なえる。 As described above, the concrete structure peeling prevention sheet and the concrete structure peeling prevention method of the present invention include, for example, even a worker who is inexperienced in repair work or a worker who does not have sufficient repair tools. You can easily and quickly take emergency measures against peeling.

1 コンクリート構造物
3 補強樹脂シート
4 粘着シート
5 縦糸
6 横糸
7 アクリル樹脂
1 Concrete structure 3 Reinforcing resin sheet 4 Adhesive sheet 5 Warp thread 6 Weft thread 7 Acrylic resin

8 合成樹脂シート
9 粘着層
15 有機溶媒(アセトン)
8 Synthetic resin sheet 9 Adhesive layer 15 Organic solvent (acetone)

Claims (8)

複数の繊維糸を交差して網状に配置した補強繊維を合成樹脂で含浸した薄厚シート状の補強樹脂シートを備え、該補強樹脂シートをコンクリート構造物の表面に固定したコンクリート構造物の剥落防止シ−トにおいて、前記補強樹脂シートの表面に耐候性を付与し、補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着し、該粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定したことを特徴とするコンクリート構造物の剥落防止シート。 A thin sheet-like reinforcing resin sheet impregnated with synthetic resin is provided with reinforcing fibers arranged in a net shape by crossing a plurality of fiber threads, and the reinforcing resin sheet is fixed to the surface of the concrete structure to prevent peeling of the concrete structure. In concrete, the surface of the reinforcing resin sheet is provided with weather resistance, and an adhesive sheet having a soft adhesive layer adhered to the other side surface of the reinforcing resin sheet is integrally adhered or heat-sealed, and the adhesive sheet is interposed. A peeling prevention sheet for a concrete structure, characterized in that the reinforcing resin sheet is fixed to the surface of the concrete structure. 前記補強樹脂シートを接着剤を介してコンクリート構造物の表面に接着した請求項1記載のコンクリート構造物の剥落防止シート。 The peeling prevention sheet for a concrete structure according to claim 1, wherein the reinforcing resin sheet is adhered to the surface of the concrete structure via an adhesive. 前記補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着層を被着し、該粘着層を介してコンクリート構造物の表面に固定したことを特徴とするコンクリート構造物の剥落防止シート。 An adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive sheet is coated with an elastic synthetic resin sheet and a soft adhesive layer adhered or heat-sealed to one side surface of the synthetic resin sheet. A peeling prevention sheet for a concrete structure, which is fixed to the surface of the concrete structure via the adhesive layer. 前記補強樹脂シートは、所定荷重を短時間載荷した際の最大荷重が所定値以上で、所定荷重を長時間載荷後の変位量が所定値以内である請求項1または2記載のコンクリート構造物の剥落防止シート。 The concrete structure according to claim 1 or 2, wherein the reinforcing resin sheet has a maximum load of a predetermined value or more when a predetermined load is loaded for a short time and a displacement amount of a predetermined load or less after being loaded for a long time. Peeling prevention sheet. 前記補強樹脂シートは、短時間載荷時の最大荷重が1.5kN以上で、長時間載荷時の
載荷荷重が0.3kNで、該載荷荷重を7日載荷時の変位量が15mm以内である請求項
4記載のコンクリート構造物の剥落防止シート。
The reinforced resin sheet has a maximum load of 1.5 kN or more when loaded for a short time, a loaded load of 0.3 kN when loaded for a long time, and a displacement amount of 15 mm or less when loaded for 7 days. Item 4. The exfoliation prevention sheet for the concrete structure according to item 4.
前記補強樹脂シートはポリオレフィン製繊維糸を縦0.05〜0.25mm、横0.23
〜0.43mm、横/縦の比(扁平度)が1.5超の矩形断面に形成し、該繊維糸の2軸
を目合い1.06〜1.08mm、開口率35〜70%に配列し、該繊維糸をアクリル樹脂で含浸した請求項1記載のコンクリート構造物の剥落防止シート。
The reinforcing resin sheet is made of polyolefin fiber yarn with a length of 0.05 to 0.25 mm and a width of 0.23.
It is formed into a rectangular cross section with a width / aspect ratio (flatness) of more than 1.5 of 0.43 mm, and the two axes of the fiber yarn have a mesh size of 1.06 to 1.08 mm and an aperture ratio of 35 to 70%. The exfoliation prevention sheet for a concrete structure according to claim 1, which is arranged and the fiber threads are impregnated with an acrylic resin.
複数の繊維糸を交差して網状に配置した繊維シートを合成樹脂で含浸した薄厚のシート状の補強樹脂シートを備え、該補強樹脂シートをコンクリート構造物の表面に固定するコンクリート構造物の剥落防止工法において、前記補強樹脂の表面は耐候性を備え、補強樹脂シートの他側面に軟質の粘着層を被着した粘着シートを一体に接着または熱融着し、コンクリート構造物の表面の下地をアセトン等の有機溶媒で拭き取り処理し、該下地処理後、コンクリート構造物の表面に前記粘着シートを介して補強樹脂シートをコンクリート構造物の表面に固定することを特徴とするコンクリート構造物の剥落防止工法。 A thin sheet-like reinforcing resin sheet in which a fiber sheet in which a plurality of fiber threads are crossed and arranged in a net shape is impregnated with a synthetic resin is provided, and the reinforcing resin sheet is fixed to the surface of the concrete structure to prevent peeling of the concrete structure. In the construction method, the surface of the reinforcing resin has weather resistance, and an adhesive sheet having a soft adhesive layer adhered to the other side surface of the reinforcing resin sheet is integrally adhered or heat-sealed, and the base of the surface of the concrete structure is acetone. A method for preventing the concrete structure from peeling off, which comprises fixing the reinforcing resin sheet to the surface of the concrete structure via the adhesive sheet after wiping with an organic solvent such as the above, and after the base treatment. .. 前記補強樹脂シートの他側面に粘着シートを一体に固定し、該粘着シートは弾力性を有する合成樹脂シートと、該合成樹脂シートの一側面に接着または熱融着した軟質の粘着層とからなり、該粘着層を介して補強樹脂シートをコンクリート構造物の表面に固定するコンクリート構造物の剥落防止工法。 An adhesive sheet is integrally fixed to the other side surface of the reinforcing resin sheet, and the adhesive sheet is composed of an elastic synthetic resin sheet and a soft adhesive layer bonded or heat-sealed to one side surface of the synthetic resin sheet. , A method for preventing the concrete structure from peeling off, in which the reinforcing resin sheet is fixed to the surface of the concrete structure via the adhesive layer.
JP2019121201A 2019-06-28 2019-06-28 Exfoliation prevention sheet of concrete structure and exfoliation prevention method of concrete structure Pending JP2021006695A (en)

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JPH1061206A (en) * 1996-05-21 1998-03-03 Toray Ind Inc Repair and reinforcing method for structure
JP2003025355A (en) * 2001-07-11 2003-01-29 Asahi Fiber Glass Co Ltd Long fiber reinforced thermoplastic resin sheet, method for manufacturing the same, and composite molded object reinforced by the sheet
JP3477118B2 (en) * 1998-10-26 2003-12-10 住友ゴム工業株式会社 Method for reinforcing plate-like concrete structures
JP2011052457A (en) * 2009-09-02 2011-03-17 Konishi Co Ltd Method and structure for preventing fall of concrete piece
JP2012092237A (en) * 2010-10-27 2012-05-17 Ube Nitto Kasei Co Ltd Method for production of fiber-reinforced resin sheet, and fiber-reinforced resin sheet
JP2014065889A (en) * 2012-07-04 2014-04-17 Dainippon Printing Co Ltd Tacky adhesive layer and tacky adhesive sheet
JP5722714B2 (en) * 2011-07-08 2015-05-27 倉敷紡績株式会社 Concrete peeling prevention sheet and concrete peeling prevention method using the same
JP2018127843A (en) * 2017-02-09 2018-08-16 ショーボンド建設株式会社 Exfoliation preventing sheet, exfoliation preventing method and repairing method of exfoliation prevention

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1061206A (en) * 1996-05-21 1998-03-03 Toray Ind Inc Repair and reinforcing method for structure
JP3477118B2 (en) * 1998-10-26 2003-12-10 住友ゴム工業株式会社 Method for reinforcing plate-like concrete structures
JP2003025355A (en) * 2001-07-11 2003-01-29 Asahi Fiber Glass Co Ltd Long fiber reinforced thermoplastic resin sheet, method for manufacturing the same, and composite molded object reinforced by the sheet
JP2011052457A (en) * 2009-09-02 2011-03-17 Konishi Co Ltd Method and structure for preventing fall of concrete piece
JP2012092237A (en) * 2010-10-27 2012-05-17 Ube Nitto Kasei Co Ltd Method for production of fiber-reinforced resin sheet, and fiber-reinforced resin sheet
JP5722714B2 (en) * 2011-07-08 2015-05-27 倉敷紡績株式会社 Concrete peeling prevention sheet and concrete peeling prevention method using the same
JP2014065889A (en) * 2012-07-04 2014-04-17 Dainippon Printing Co Ltd Tacky adhesive layer and tacky adhesive sheet
JP2018127843A (en) * 2017-02-09 2018-08-16 ショーボンド建設株式会社 Exfoliation preventing sheet, exfoliation preventing method and repairing method of exfoliation prevention

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