JP2012097547A - Strengthening method using fiber reinforced sheet irradiated with uv, and composite fiber-resin of uv polymerization reaction type - Google Patents
Strengthening method using fiber reinforced sheet irradiated with uv, and composite fiber-resin of uv polymerization reaction type Download PDFInfo
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コンクリート構造物のひび割れや剥落等に対し、コンクリート躯体施工面へ、カーボン繊維シート等の連続繊維シートを接着する従来の連続繊維シート補強工法において、本発明は、接着剤に常温硬化樹脂及び硬化剤を用いる代わりに、ＵＶ（紫外線を）重合反応型樹脂を用い、該施工面に塗布、連続繊維シートに含浸させ、ＵＶ（紫外線）を数秒間照射することにより、連続繊維シートを強度に付着させる「強化繊維シートＵＶ補強工法」に関する。なお、ＵＶ（紫外線）は以下ＵＶと称する。In a conventional continuous fiber sheet reinforcing method in which a continuous fiber sheet such as a carbon fiber sheet is bonded to a concrete frame construction surface against cracking or peeling off of a concrete structure, the present invention includes a room temperature curable resin and a curing agent. Instead of using UV, UV (ultraviolet) polymerization reaction type resin is used, and the construction surface is coated, impregnated into the continuous fiber sheet, and irradiated with UV (ultraviolet) for a few seconds to adhere the continuous fiber sheet to strength. The present invention relates to a “reinforced fiber sheet UV reinforcing method”. UV (ultraviolet light) is hereinafter referred to as UV.
先ず、「強化繊維シートＵＶ補強工法」の対象となるコンクリート構造物は、例えば、橋梁（橋脚、床板、桁）、トンネル、高架車道、高速道路裏面、橋梁、建物柱・桁、外壁、ＲＣ煙突、電柱、上下水道ヒューム管、給水槽、桟橋床板、建築物スラブ、パース岸壁等、が上げられる。First, concrete structures subject to the “reinforced fiber sheet UV reinforcement method” include, for example, bridges (bridge piers, floorboards, girders), tunnels, elevated carriageways, rear surfaces of highways, bridges, building columns / girders, outer walls, RC chimneys. , Utility poles, water and sewage fume pipes, water tanks, jetty floors, building slabs, Perth quay, etc.
該対象物の欠損例を挙げれば、剥落、ひび割れ、海水による鉄筋の腐食・膨張、天候・気候変動による経年変化、地震・洪水など外力による橋梁や橋脚の耐力不足、亜硫酸ガス・酸性雨による表層脆弱化、車両通行量・積載量の増大・高速化等道路過負荷から起こる流動化・路盤軟弱化・クラック、温暖差による膨脹収縮の亀裂等である。Examples of missing objects include peeling, cracking, corrosion / expansion of rebars due to seawater, secular change due to weather / climate changes, insufficient strength of bridges and piers due to external forces such as earthquakes / floods, surface layer due to sulfurous acid gas / acid rain These include fluidization, roadbed softening / cracking caused by road overload, such as weakening, increased vehicle traffic / loading / speeding, cracks in expansion / contraction due to warming.
上記のコンクリート構造物のひび割れや剥落等の補修・補強の主力工法は、コンクリート躯体施工面への連続強化繊維シート補修・補強工法が広く普及しているが、上記劣化現象等が生じており、本発明はこれを解決する「強化繊維シートＵＶ補強工法」に関する。As for the main construction method for repairing and reinforcing cracks and peeling of the above concrete structures, the continuous reinforcing fiber sheet repairing and reinforcing method on the concrete frame construction surface is widely spread, but the above deterioration phenomenon has occurred, The present invention relates to a “reinforced fiber sheet UV reinforcing method” that solves this problem.
コンクリート構造物の補修・補強方法としては、従来有力な工法は、炭素繊維やアラミド繊維、ビニロン繊維、ガラス繊維等を一方向又は二方向に配列した連続繊維シートである。連続繊維シートを、エポキシ樹脂等の常温硬化樹脂及び硬化剤を用いてコンクリート躯体施工面に含浸させ接着し、強化プラスチック化することで、引張り強度においては鋼板補強と同等もしくは近い効果を得られ、軽量、引張り弾性、せん断耐力、曲げ耐力、疲労寿命を向上させる有効な工法として定着している。As a method for repairing / reinforcing concrete structures, a conventionally effective construction method is a continuous fiber sheet in which carbon fibers, aramid fibers, vinylon fibers, glass fibers and the like are arranged in one direction or two directions. By impregnating and bonding the continuous fiber sheet to the concrete frame construction surface using a normal temperature curing resin such as an epoxy resin and a curing agent, and making it a reinforced plastic, an effect equivalent to or close to steel plate reinforcement can be obtained in tensile strength, Established as an effective method to improve light weight, tensile elasticity, shear strength, bending strength and fatigue life.
しかしながら一方、該連続繊維シート補強工法の作業には、下地ケレン、プライマー処理、不陸修正、強化繊維シート重ね貼り、含浸、接着とエポキシ樹脂等接着剤塗布、アミン等の硬化剤塗布などなど、機材待機、樹脂硬化までの養生期間、天候の影響等多くの工数がかかり工事費用がかさみがちで、アミン系硬化剤使用の問題もあった。However, on the other hand, the work of the continuous fiber sheet reinforcement construction method is, for example, ground beren, primer treatment, unevenness correction, reinforced fiber sheet overlaying, impregnation, adhesion and adhesive application such as epoxy resin, application of curing agent such as amine, etc. There was a problem with the use of amine-based curing agents due to many man-hours such as waiting for equipment, curing period until resin curing, and the influence of weather, which led to high construction costs.
他方、ＵＶ硬化は、ＵＶランプより照射されるＵＶ（２００ｎｍ〜４５０ｎｍ）を当てることにより短時間で硬化が可能。ＵＶ硬化性の樹脂・接着剤・塗料・レジスト等が瞬時に光重合反応をおこし硬化する技術として知られる。On the other hand, UV curing can be cured in a short time by applying UV (200 nm to 450 nm) irradiated from a UV lamp. UV curable resins, adhesives, paints, resists, etc. are known as a technique that instantaneously undergoes a photopolymerization reaction to cure.
ＵＶ硬化樹脂は、一般的に、モノマー、オリゴマー、光重合開始剤と添加剤で構成される。ＵＶ光の照射を受けると、光重合反応開始剤がＵＶの照射によりラジカルを発生、重合のきっかけとなる。モノマー（液体）状態からポリマー（固体）状態に転換させる「光重合反応」を起す。光反応は励起された分子の反応で、熱反応は基底状態の分子の反応であって、普通の合成法では何段階も反応を重ねなければならないものが、光反応では波長によりエネルギーの選択が可能なため、光は有効なエネルギーの大量提供が可能。光は特定の反応を進め、ラジカル発生の量子効率が高くなり、高エネルギーを持った物質を合成できる。The UV curable resin is generally composed of a monomer, an oligomer, a photopolymerization initiator and an additive. When irradiated with UV light, the photopolymerization initiator generates radicals by UV irradiation and triggers polymerization. Initiates a “photopolymerization reaction” that converts the monomer (liquid) state to the polymer (solid) state. Photoreaction is a reaction of excited molecules and thermal reaction is a reaction of molecules in the ground state. In ordinary synthesis methods, reactions must be repeated in several steps, but in photoreactions, energy is selected depending on the wavelength. Because it is possible, light can provide a large amount of effective energy. Light advances specific reactions, increases the quantum efficiency of radical generation, and can synthesize materials with high energy.
これらのＵＶ硬化技術は、従来の熱乾燥などと比較すると硬化・乾燥までに至る時間が圧倒的に短く、溶剤等の使用量が飛躍的に削減される為、省エネ、省スペース、環境面に於いてその特性を発揮する。These UV curing technologies are overwhelmingly short in time to cure and dry compared with conventional heat drying, etc., and the amount of solvent used is drastically reduced, saving energy, saving space, and the environment. It demonstrates its characteristics.
その用途は、各種金属の接着プライマー、木製床コーティング、防錆コーティング、ポッティング紙の艶出し、フィルム艶消し、耐水性付与、屈折率調整、滑り防止、静電防止・導電性付与、防曇性付与、硬度付与（ハードコート）、耐熱性付与、滑性付与等接着など多岐にわたる。その用途によって樹脂の特性が多種多様に変化するのもＵＶ樹脂の特徴である。Applications include adhesion primer for various metals, wooden floor coating, rust-proof coating, matting of potting paper, matte film, water resistance, refractive index adjustment, anti-slip, anti-static / conductivity, anti-fogging Wide range of applications such as adhesion, hardness (hard coat), heat resistance, and lubricity. It is also a feature of UV resin that the properties of the resin vary depending on the application.
現状の連続繊維シート補強工法はコンクリート巻き立て工法や鋼板補強工法に比べても、ローコストで短期の工期で施工できる長所を持つ工法として知られている。The current continuous fiber sheet reinforcement method is known as a method that has the advantage that it can be constructed at a low cost and in a short period of time compared to the concrete winding method and the steel plate reinforcement method.
しかし、これらの連続繊維シート補強工法によれば、コンクリート構造物の劣化した柱や梁など欠損部分を補修・補強する工法として、コンクリート躯体に強化繊維シートを巻いて補修・補強することから、プライマー処理・エポキシ樹脂等の接着剤塗布、繊維シート粘着・複数層の重ね貼り、アミン等硬化剤の使用等、所要機材・仮設設備、所要人員、１日以上の硬化養生期間、雨休み露止まり等天候要因による樹脂の接着不良、施工時間・施工手順等多目の工数などなど、コスト負担に跳ねる問題点があった。However, according to these continuous fiber sheet reinforcement methods, as a method of repairing and reinforcing defective parts such as columns and beams that have deteriorated in concrete structures, a reinforcing fiber sheet is wound around the concrete frame to repair and reinforce it. Treatment / Applying adhesives such as epoxy resin, fiber sheet adhesion / stacking multiple layers, using curing agents such as amines, etc. Required equipment / temporary equipment, required personnel, curing curing period of 1 day or more, rain resting, etc. There were problems such as poor adhesion of the resin due to weather factors, a lot of man-hours such as construction time and construction procedures, etc.
さらに、接着用樹脂の硬化を促進するためアミン系の硬化剤に頼らざるを得ない問題があった。Furthermore, there is a problem that an amine-based curing agent must be relied upon to accelerate the curing of the adhesive resin.
本発明の目的は、上記問題を解決するための強化繊維シートＵＶ補強工法を提供することにある。The objective of this invention is providing the reinforcing fiber sheet UV reinforcement construction method for solving the said problem.
上記の課題を解決するには、本発明に係る強化連続繊維シートＵＶ補強工法およびＵＶ重合反応型複合繊維樹脂にて達成される。
要約すれば、本発明では、コンクリート躯体施工面に、常温硬化樹脂及び硬化剤を含浸塗布する、従来の工法に代わって、ＵＶ重合反応型樹脂のみを塗布する。
アミン等硬化剤は使用しない。その上に強化繊維シートを含浸粘着させて、ＵＶを照射、一瞬に硬化を行う強化繊維シートＵＶ補強工法を提供する。In order to solve the above-described problems, the reinforced continuous fiber sheet UV reinforcing method and the UV polymerization reaction type composite fiber resin according to the present invention are achieved.
In summary, in the present invention, only the UV polymerization reaction type resin is applied to the concrete frame construction surface in place of the conventional method of impregnating and applying the room temperature curing resin and the curing agent.
Do not use curing agents such as amines. Provided is a reinforcing fiber sheet UV reinforcing method in which a reinforcing fiber sheet is impregnated and adhered, UV is irradiated, and curing is performed instantaneously.
本発明に用いる強化連続繊維シートの繊維素材としては、炭素繊維・ガラス繊維・セラミックス繊維・ボロン繊維等の無機繊維、アラミド・ポリエステル・ポリエチレン・ナイロン・ビニロン・アクリル・ポリアセタール・ＰＢＯ・高強度ポリプロピレン・高強度ポリエチレン・ポリアミド・ポリカーボネート樹脂・ビニルエステル系樹脂等の有機繊維、チタン・スチール等の金属繊維から選択されるいずれかの繊維シートであるか、或いは、前記繊維を複数種混入して使用することができる。As the fiber material of the reinforced continuous fiber sheet used in the present invention, inorganic fibers such as carbon fiber, glass fiber, ceramic fiber, boron fiber, aramid, polyester, polyethylene, nylon, vinylon, acrylic, polyacetal, PBO, high-strength polypropylene, It is a fiber sheet selected from organic fibers such as high-strength polyethylene, polyamide, polycarbonate resin, vinyl ester resin, and metal fibers such as titanium and steel, or a mixture of a plurality of these fibers. be able to.
上記連続繊維シートは、繊維が編織成（構成）されている編物、織物あるいは不織布からなるか、シート状や格子状及びメッシュ状のいずれかであるか、或いは２軸〜４軸の格子状であるか、複数種混入し融合して使用するか、いずれであってもよい。The continuous fiber sheet is made of a knitted fabric, a woven fabric or a nonwoven fabric in which fibers are knitted (constructed), or is in the form of a sheet, lattice, or mesh, or in a biaxial to tetraaxial lattice. There may be either a plurality of types mixed together and used.
メッシュ状物としては、開口率が３０％以上の繊維あるいは複合糸による積層布で、補強効果のあるものが好ましい。The mesh-like material is preferably a laminated fabric made of fibers or composite yarns having an opening ratio of 30% or more and having a reinforcing effect.
連続繊維シートの厚みの基準として、１枚の目付重量が１００〜２０００ｇ／ｍ２のシートが好ましい。As a standard for the thickness of the continuous fiber sheet, a sheet having a basis weight of 100 to 2000 g / m 2 is preferable.
本発明に用いるＵＶ重合反応型樹脂は、補修・補強工事対象及び強化連続繊維シートとの親和性が高く、密着性を高める樹脂を優先する。エポキシ樹脂、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリエステル樹脂、ポリアミド樹脂、アクリル樹脂、ポリカーボネート樹脂、ウレタン樹脂、ウレア樹脂、又は、ＭＭＡ樹脂等のラジカル反応系樹脂から選択されるいずれかの樹脂であるか、或いは、前記樹脂をを複数種混入して使用することができる。選択されるいずれの樹脂も、ＵＶ重合反応型樹脂中成分である重合開始剤と相補性のよいものから選択されることが好ましい。The UV polymerization reaction type resin used in the present invention has a high affinity with the object of repair / reinforcement work and the reinforced continuous fiber sheet, and gives priority to a resin that improves adhesion. It is any resin selected from radical reaction resins such as epoxy resin, vinyl ester resin, unsaturated polyester resin, polyester resin, polyamide resin, acrylic resin, polycarbonate resin, urethane resin, urea resin, or MMA resin. Alternatively, a plurality of types of the above resins can be mixed and used. Any resin selected is preferably selected from those having good complementarity to the polymerization initiator which is a component in the UV polymerization reaction type resin.
又、繊維の粉体を液状ＵＶ重合反応型樹脂に混合、該繊維にＵＶ重合反応型樹脂を吸着させ、更に次いで長さが極小の繊維をサイズの小さいものから順次上記の液状ＵＶ重合反応型樹脂に加え混合してなることを特徴とするＵＶ重合反応型複合繊維樹脂を提供する。
次ぎに、以上の構成からなる補強構造を施工するための、本発明に係る補強工法の一実施形態について説明する。Also, the fiber powder is mixed with a liquid UV polymerization reaction resin, the UV polymerization reaction resin is adsorbed on the fiber, and then the above-mentioned liquid UV polymerization reaction type is sequentially applied to the smallest length fibers from the smallest size. Provided is a UV polymerization reaction type composite fiber resin characterized by being mixed with a resin.
Next, an embodiment of a reinforcing method according to the present invention for constructing a reinforcing structure having the above configuration will be described.
本発明の第１は、請求項１に記載の、従来のコンクリート連続繊維シート補強工法において、常温硬化樹脂及び硬化剤を使用している代わりに、ＵＶ重合反応型樹脂のみを用い、硬化剤を使用せず、小型のＵＶ照射機にて、ＵＶを僅か数秒間程度照射することをもってなされることを特徴とする強化繊維シートＵＶ補強工法に関する。The first of the present invention is the conventional concrete continuous fiber sheet reinforcing method according to
本発明の第２は、請求項２に記載の、液状ＵＶＶ重合反応型樹脂に繊維の粉体を混合吸着させ、次いで長さが極小の繊維を、サイズの小さいものから順次上記の液状ＵＶ重合反応型樹脂に加え混合してなるＵＶ重合反応型複合繊維樹脂に関する。According to a second aspect of the present invention, fiber powder is mixed and adsorbed on the liquid UVV polymerization reaction type resin according to
更に上記ＵＶ重合反応型複合繊維樹脂に、焼却灰等のコンクリート骨材を混練・混合するＵＶ重合反応型複合繊維樹脂組成物を得てもよく、上記ＵＶ重合反応型複合繊維樹脂又はこのＵＶ重合反応型複合繊維樹脂組成物をコンクリート施工面に塗布、含浸、硬化を目視して、ＵＶ照射を行うものであることは言うまでもない。Further, a UV polymerization reaction type composite fiber resin composition in which concrete aggregates such as incinerated ash are kneaded and mixed with the UV polymerization reaction type composite fiber resin may be obtained. Needless to say, the reactive composite fiber resin composition is applied to the concrete construction surface, and UV irradiation is performed by visually observing the impregnation and curing.
本発明の第３は、請求項３に記載の、コンクリート橋脚外周の水中部分に発生する剥落等の橋脚補修・補強作業において、請求項１又は２に記載のＵＶＵＶ重合反応型複合繊維樹脂又はＵＶ重合反応型複合繊維樹脂組成物を水中吸着自走型多機能ロボットに、コンクリート橋脚外周の清掃・研磨・脱水・該複合繊維樹脂注入塗装・乾燥・移動作業を自動的に実行させ同時にＵＶ照射を行なわせることを持って特徴とする水中コンクリート補強工法に関する。A third aspect of the present invention is the UVUV polymerization reaction type composite fiber resin or UV according to
本発明の第４は、請求項４に記載の、可視光域でエネルギー吸収を持つ光増感剤を組み合わせてなるＵＶ（紫外線）重合反応型樹脂をいることを特徴とする請求項１の強化繊維シートＵＶ補強工法に関する。これは炭素繊維シート又はアラミド繊維シートのコンクリート施工面へ
の含浸接着効果を更に高めるＵＶ重合反応型樹脂を用いる連続繊維シート方法に関する。A fourth aspect of the present invention is the reinforcement according to
以下に実施例を挙げて本発明を説明するが、本発明はこれにより何等限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.
本実施例は、コンクリート剥落等への連続繊維シート補修・補強方法における、従来の常温硬化樹脂に硬化剤を用いる樹脂硬化法と同じように、コンクリート平板を施工面としてＵＶ重合反応型樹脂を塗布ビニロン繊維メッシュシートを貼り、含浸させた上を、ＵＶを当てる実験してみたところ、バインダーが格子目を固定、セメントの食い付きが良く、しかも極めて安定して強度と弾性の高さを見ることができた。In this example, a UV polymerization reaction type resin is applied to a concrete plate as a construction surface in the same manner as a conventional resin curing method using a curing agent for a normal temperature curing resin in a continuous fiber sheet repair / reinforcement method for concrete peeling, etc. After experimenting to apply UV on the impregnated vinylon fiber mesh sheet, the binder fixes the lattice, the cement bite is good, and the strength and elasticity are very stable. I was able to.
実施例１ コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面を３つに区切って、２０℃における粘度が５００ｃｐｓのＵＶ重合反応型合成樹脂（アクリル系、（株）アシレ社製）を、平板表面を３ヶ所に上塗りし、１つの面には、１方向、２００ｇ目付巾５０ｃｍ５０ｍ巻きのカーボン繊維シート（前田織工株式会社製）を粘着し、２つの面には、縦横２方向巾１００センチのアラミド繊維（トワロン）シート（前田織工株式会社）を粘着、３つの面には、巾１００センチのビニロン繊維メッシュシートを粘着、続いて何れの表面にも、ＵＶ照射機（１．２ｋｇ、出力ＵＶ波長３６５ナノメートル、（株）アシレ社製）でＵＶを照射したところ、カーボン繊維シートやアラミド繊維（トワロン）シートはシート下の樹脂がシートの網目に含浸しているものの、固化は緩い状態。ビニロン繊維メッシュシートは瞬間的に固化した。Example 1 A specimen surface of a concrete flat plate (length 30 cm, width 30 cm, width 5 cm) was divided into three parts, and a UV polymerization reaction type synthetic resin (acrylic, manufactured by Asile Co., Ltd.) having a viscosity of 500 cps at 20 ° C. was obtained. The surface of the flat plate is overcoated at three locations, and a carbon fiber sheet (made by Maeda Oriko Co., Ltd.) wound in one direction with a width of 50 cm and a weight of 50 m is adhered to one surface, and the two surfaces have a width of 100 in both vertical and horizontal directions. Adheres centimeter aramid fiber (Twaron) sheet (Maeda Oriko Co., Ltd.), adheres 100 cm wide vinylon fiber mesh sheet on three sides, and then applies UV irradiation machine (1.2 kg) to any surface When UV irradiation is performed with an output UV wavelength of 365 nanometers (manufactured by Asile Co., Ltd.), the resin under the sheet of the carbon fiber sheet or aramid fiber (Twaron) sheet is But it is impregnated into the door of the mesh, solidifying the loose state. The vinylon fiber mesh sheet solidified instantaneously.
実施例２ コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面の半分に、予め２０℃における粘度が５００ｃｐｓのアクリル系ＵＶ反応型樹脂２００ｇ（（株）アシレ社製）に炭素繊維粉体１ｇ及び長さが３ミリの炭素繊維１ｇを混和したＵＶ反応型合成樹脂組成物を、平板面に上塗りし、直後にＵＶ照射したところ、上記合成樹脂組成物の皮膜は供試体表面で一瞬固まったが、該皮膜はコンクリートの表層をはぎ取り捲れ上った。Example 2 Half of the surface of a specimen of a concrete flat plate (length 30 cm, width 30 cm, width 5 cm), preliminarily 200 g of acrylic UV-reactive resin having a viscosity of 500 cps at 20 ° C. (manufactured by Asile Co., Ltd.), 1 g of carbon fiber powder. Then, a UV-reactive synthetic resin composition mixed with 1 g of carbon fiber having a length of 3 mm was overcoated on a flat plate surface, and immediately after UV irradiation, the coating film of the synthetic resin composition hardened momentarily on the surface of the specimen. However, the coating peeled off the concrete surface.
同様に、上記コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面の他の半分に、予め２０℃における粘度が５００ｃｐｓのアクリル系ＵＶ反応型樹脂２００ｇ（（株）アシレ社製）に、ビニロン繊維長さ０．５ｍｍ１ｇを混和、平板面に上塗りし、直後にＵＶ照射したところ、該ＵＶ反応型合成樹脂組成物の皮膜は硬化、コンクリートの表層に強く接着する成果を得た。
上記実施例１、２：２０１０年１０月２０日午前１０時 日本開発（株）都筑事務所Similarly, on the other half of the surface of the test piece of the above-mentioned concrete flat plate (length 30 cm, width 30 cm, width 5 cm), an acrylic UV-reactive resin 200 g (manufactured by Asile Co., Ltd.) having a viscosity at 20 ° C. of 500 cps in advance was added to vinylon. When a fiber length of 0.5 mm 1 g was mixed, a flat plate surface was overcoated, and UV irradiation was performed immediately thereafter, the film of the UV-reactive synthetic resin composition was cured and resulted in strong adhesion to the concrete surface layer.
Examples 1 and 2: October 20th, 2010, 10:00 am Nippon Development Co., Ltd. Tsuzuki Office
実施例１について、ＵＶ重合反応型合成樹脂は、アクリル系の樹脂であり、使用した樹脂の塗布量も薄かったせいもあり、炭素繊維シートの接着は十分とは言えなかった。
アラミド繊維シートもほぼ同様である。しかし、ビニロン繊維シートにあっては、２方向のメッシュ状で菱形格子を構成しており、自己含浸力があり、粘着、強度に問題のないことが分かっ。樹脂バインダーが、メッシュ格子目を固定、セメントの食い付きも良く、ビニロン繊維シートの粘着強度と弾性の高さを見せつけた。Regarding Example 1, the UV polymerization reaction type synthetic resin was an acrylic resin, and the amount of the resin used was also thin, and the carbon fiber sheet was not sufficiently adhered.
The same applies to the aramid fiber sheet. However, in the vinylon fiber sheet, it is found that the rhombus lattice is formed in a mesh shape in two directions, has a self-impregnation force, and there is no problem in adhesion and strength. The resin binder fixed the mesh lattice, and the bite of the cement was good, showing the adhesive strength and elasticity of the vinylon fiber sheet.
連続繊維シートのメッシュ状物としては、開口率が３０％以上の繊維か、あるいは複合糸による積層布か、更には、２軸積層布か３軸積層シートである方が、上塗り樹脂、下塗り樹脂共にメッシュ状物に侵入し易く高い決着度を効果得た。The continuous fiber sheet mesh-like material is a fiber having an opening ratio of 30% or more, or a laminated cloth made of composite yarn, and moreover, a biaxial laminated cloth or a triaxial laminated sheet is used as a top coat resin or undercoat resin. Both of them easily penetrated into mesh-like objects and achieved a high degree of settlement.
実施例２については、ＵＶ重合反応型樹脂に硬化用の微細な炭素繊維を混和しコンクリート平板表面に塗布したところ、捲れ上がった。その捲れた面にはコンクリートの表層が強く付着していた。このことから付着強度は問題ないことが分かった。ただ、付着面に一層の強度があれば、捲れ上がらずに強く決着する可能性が考えられた。ＵＶ重合反応型樹脂組成物の樹脂塗布量（皮膜の厚さ）を増やすことが好ましいことが分かる。About Example 2, when fine carbon fiber for hardening was mixed with UV polymerization reaction type resin, and it apply | coated to the concrete flat plate surface, it drowned. The concrete surface was strongly adhered to the drowned surface. This indicates that there is no problem with the adhesion strength. However, there was a possibility that if the adhesion surface had a higher strength, it could be strongly settled without rolling up. It turns out that it is preferable to increase the resin application amount (film thickness) of the UV polymerization reaction type resin composition.
上記ＵＶ重合反応型樹脂はアクリル系であるが、これをエポキシ系ＵＶ重合反応型合成樹脂に代えた試験を行う必要性を感じた。Although the UV polymerization reaction type resin is acrylic, it was felt that it was necessary to perform a test in which this was replaced with an epoxy UV polymerization reaction type synthetic resin.
ビニロン繊維長さ０．５ｍｍ１ｇを混和したＵＶ重合反応型合成樹脂組成物は、ＵＶ照射により、皮膜が硬化、コンクリート表層の付着強度には問題がないことが分かった。It was found that the UV polymerization reaction type synthetic resin composition mixed with vinylon fiber length of 0.5 mm 1 g was cured by UV irradiation, and there was no problem in the adhesion strength of the concrete surface layer.
実施例１、実施例２共に、アクリル系ＵＶ重合反応型合成樹脂を使用しており、これではビニロン繊維メッシュシートの接着は決まったが、炭素繊維シート及びアラミド系繊維シートにおいては、含浸性の高いエポキシ系ＵＶ重合反応型合成樹脂を、厚く塗布すれば十分接着度は向上すると伺わせた。In both Example 1 and Example 2, an acrylic UV polymerization reaction type synthetic resin was used, and in this case, the adhesion of the vinylon fiber mesh sheet was determined. However, in the carbon fiber sheet and the aramid fiber sheet, the impregnating property was determined. It was said that the adhesion degree would be improved sufficiently if a high epoxy UV polymerization reaction type synthetic resin was applied thickly.
本発明者は、少なくとも実施例１及び実施例２において、ビニロン繊維メッシュシートは自己含浸があり、好ましい接着硬化が得られたと分かり、本実施例のコンクリート剥落等に対する連続繊維シート補修・補強方法において、ＵＶ重合反応型合成樹脂を用いることで施工性が格段に向上することを見出した。
カーボン繊維及びアラミド繊維シートの強い粘着を達成する構成要素の組み合わせについて、強い可能性を得た。The present inventor found that at least in Example 1 and Example 2, the vinylon fiber mesh sheet had self-impregnation, and that preferable adhesive curing was obtained, and in the continuous fiber sheet repair and reinforcement method for concrete peeling and the like of this example It was found that workability is remarkably improved by using a UV polymerization reaction type synthetic resin.
Strong possibilities were obtained for the combination of components that achieve strong adhesion of carbon fiber and aramid fiber sheets.
コンクリート剥落等の補修・補強方法としては、連続繊維シート補強工法が知られるが、常温硬化樹脂に硬化剤を用いる樹脂硬化法常態であれば、樹脂接着塗布・繊維シート重ね貼り・硬化養生期間等の施工時間・施工手順に工数多く、またアミン等硬化剤使用も避けられないという問題があった。As a method for repairing and reinforcing concrete peeling, etc., a continuous fiber sheet reinforcement method is known, but if it is a normal resin curing method using a curing agent for a room temperature curing resin, resin adhesive coating, fiber sheet overlaying, curing curing period, etc. However, there were problems in that the construction time and construction procedure required for the construction were too many and the use of hardeners such as amines was inevitable.
本発明は、常温硬化樹脂と硬化剤を用いる従来の樹脂硬化法に代わって、ＵＶ重合反応型樹脂のみを使い、それを単に数秒間ＵＶに当てるだけで、瞬間硬化することを特徴とする強化繊維シートＵＶ補強工法を提供する。The present invention is characterized in that, instead of the conventional resin curing method using a room temperature curing resin and a curing agent, only a UV polymerization reaction type resin is used, and the resin is instantaneously cured by simply exposing it to UV for a few seconds. A fiber sheet UV reinforcement method is provided.
図１を用いて、本発明の実施の形態を説明すると、The embodiment of the present invention will be described with reference to FIG.
図１において符号１は、コンクリート構造物のひび割れや剥落等の存在する橋梁の橋脚を指し、符号２は橋梁の桁である。従来の連続繊維シート補強工法において、これらコンクリート躯体施工面へ、カレン、プライマー処理を行い、その場でエポキシ樹脂等の接着剤とアミン等硬化剤を混合して塗布、その上にカーボン繊維シート等連続繊維シートを張って含浸させ、硬化度合いを目視しながら、更に連続繊維シートを複数層重ね貼り、１日以上の硬化養生期間を取るなどする連続繊維シート補強工法が定着している。In FIG. 1, the code |
本発明は、従来の常温硬化樹脂と硬化剤を混合して塗布する方式に代えて、ＵＶ重合反応型樹脂のみを塗布・含浸させ、そこにＵＶを当てるだけの簡略な樹脂硬化工法を特徴とする強化繊維シートＵＶ補強工法である。The present invention is characterized by a simple resin curing method in which only a UV polymerization reaction type resin is applied and impregnated and UV is applied thereto instead of a conventional method of mixing and applying a normal temperature curing resin and a curing agent. This is a reinforcing fiber sheet UV reinforcing method.
１ 橋梁の橋脚 ２ 橋梁の桁1
本発明は、コンクリート構造物、例えば、橋梁（橋脚、床板、桁）、トンネル、高架車道、高速道路裏面、橋梁、建物柱・桁、外壁、ＲＣ煙突、電柱、上下水道ヒューム管、給水槽、桟橋床板、建築物スラブ、パース岸壁のコンクリート構造物の構築及び補強等の用途に適用できる。The present invention is a concrete structure, for example, a bridge (bridge pier, floor board, girder), tunnel, elevated carriageway, rear surface of highway, bridge, building column / girder, outer wall, RC chimney, utility pole, water and sewage fume pipe, water tank, It can be applied to the construction and reinforcement of pier floor boards, building slabs, and concrete structures on Perth quay.
本発明の効果は、施工手順簡略化の要員減及び１日以上の硬化養生期間や天候要因（雨休み露止まり等）など施工時間短縮による工数縮減のみならず、硬化溶剤の無機化（非アミン化）が可能となる強化繊維シートＵＶ補強工法を提供する。The effects of the present invention include not only the reduction of man-hours for simplification of construction procedures, but also reduction of man-hours due to shortening of construction time such as curing curing period of 1 day or more and weather factors (rain stop, etc.), as well as mineralization of curing solvent (non-amine) Reinforced fiber sheet UV reinforcement construction method that can be realized) is provided.
また、ＵＶランプは、小型軽量で、１００Ｖ電源でどのような場所でも使用でき、取り扱い操作が簡単、特別の技術を要しない。Further, the UV lamp is small and light, can be used in any place with a 100 V power source, is easy to handle, and does not require any special technology.
コンクリート構造物のひび割れや剥落等に対し、コンクリート躯体施工面へ、カーボン繊維シート等の連続繊維シートを接着する従来の連続繊維シート補強工法において、本発明は、接着剤に常温硬化樹脂及び硬化剤を用いる代わりに、ＵＶ（紫外線を）重合反応型樹脂を用い、該施工面に塗布、連続繊維シートに含浸させ、ＵＶ（紫外線）を数秒間照射することにより、連続繊維シートを強度に付着させる「強化繊維シートＵＶ補強工法」に関する。なお、ＵＶ（紫外線）は以下ＵＶと称する。In a conventional continuous fiber sheet reinforcing method in which a continuous fiber sheet such as a carbon fiber sheet is bonded to a concrete frame construction surface against cracking or peeling off of a concrete structure, the present invention includes a room temperature curable resin and a curing agent. Instead of using UV, UV (ultraviolet) polymerization reaction type resin is used, and the construction surface is coated, impregnated into the continuous fiber sheet, and irradiated with UV (ultraviolet) for a few seconds to adhere the continuous fiber sheet to strength. The present invention relates to a “reinforced fiber sheet UV reinforcing method”. UV (ultraviolet light) is hereinafter referred to as UV.
先ず、「強化繊維シートＵＶ補強工法」の対象となるコンクリート構造物は、例えば、橋梁（橋脚、床板、桁）、トンネル、高架車道、高速道路裏面、橋梁、建物柱・桁、外壁、ＲＣ煙突、電柱、上下水道ヒューム管、給水槽、桟橋床板、建築物スラブ、パース岸壁等、が上げられる。First, concrete structures subject to the “reinforced fiber sheet UV reinforcement method” include, for example, bridges (bridge piers, floorboards, girders), tunnels, elevated carriageways, rear surfaces of highways, bridges, building columns / girders, outer walls, RC chimneys. , Utility poles, water and sewage fume pipes, water tanks, jetty floors, building slabs, Perth quay, etc.
該対象物の欠損例を挙げれば、剥落、ひび割れ、海水による鉄筋の腐食・膨張、天候・気候変動による経年変化、地震・洪水など外力による橋梁や橋脚の耐力不足、亜硫酸ガス・酸性雨による表層脆弱化、車両通行量・積載量の増大・高速化等道路過負荷から起こる流動化・路盤軟弱化・クラック、温暖差による膨脹収縮の亀裂等である。Examples of missing objects include peeling, cracking, corrosion / expansion of rebars due to seawater, secular change due to weather / climate changes, insufficient strength of bridges and piers due to external forces such as earthquakes / floods, surface layer due to sulfurous acid gas / acid rain These include fluidization, roadbed softening / cracking caused by road overload, such as weakening, increased vehicle traffic / loading / speeding, cracks in expansion / contraction due to warming.
上記のコンクリート構造物のひび割れや剥落等の補修・補強の主力工法は、コンクリート躯体施工面への連続強化繊維シート補修・補強工法が広く普及しているが、上記劣化現象等が生じており、本発明はこれを解決する「強化繊維シートＵＶ補強工法」に関する。As for the main construction method for repairing and reinforcing cracks and peeling of the above concrete structures, the continuous reinforcing fiber sheet repairing and reinforcing method on the concrete frame construction surface is widely spread, but the above deterioration phenomenon has occurred, The present invention relates to a “reinforced fiber sheet UV reinforcing method” that solves this problem.
コンクリート構造物の補修・補強方法としては、従来有力な工法は、炭素繊維やアラミド繊維、ビニロン繊維、ガラス繊維等を一方向又は二方向に配列した連続繊維シートである。連続繊維シートを、エポキシ樹脂等の常温硬化樹脂及び硬化剤を用いてコンクリート躯体施工面に含浸させ接着し、強化プラスチック化することで、引張り強度においては鋼板補強と同等もしくは近い効果を得られ、軽量、引張り弾性、せん断耐力、曲げ耐力、疲労寿命を向上させる有効な工法として定着している。As a method for repairing / reinforcing concrete structures, a conventionally effective construction method is a continuous fiber sheet in which carbon fibers, aramid fibers, vinylon fibers, glass fibers and the like are arranged in one direction or two directions. By impregnating and bonding the continuous fiber sheet to the concrete frame construction surface using a normal temperature curing resin such as an epoxy resin and a curing agent, and making it a reinforced plastic, an effect equivalent to or close to steel plate reinforcement can be obtained in tensile strength, Established as an effective method to improve light weight, tensile elasticity, shear strength, bending strength and fatigue life.
しかしながら一方、該連続繊維シート補強工法の作業には、下地ケレン、プライマー処理、不陸修正、強化繊維シート重ね貼り、含浸、接着とエポキシ樹脂等接着剤塗布、アミン等の硬化剤塗布などなど、機材待機、樹脂硬化までの養生期間、天候の影響等多くの工数がかかり工事費用がかさみがちで、アミン系硬化剤使用の問題もあった。However, on the other hand, the work of the continuous fiber sheet reinforcement construction method is, for example, ground beren, primer treatment, unevenness correction, reinforced fiber sheet overlaying, impregnation, adhesion and adhesive application such as epoxy resin, application of curing agent such as amine, etc. There was a problem with the use of amine-based curing agents due to many man-hours such as waiting for equipment, curing period until resin curing, and the influence of weather, which led to high construction costs.
他方、ＵＶ硬化は、ＵＶランプより照射されるＵＶ（２００ｎｍ〜４５０ｎｍ）を当てることにより短時間で硬化が可能。ＵＶ硬化性の樹脂・接着剤・塗料・レジスト等が瞬時に光重合反応をおこし硬化する技術として知られる。On the other hand, UV curing can be cured in a short time by applying UV (200 nm to 450 nm) irradiated from a UV lamp. UV curable resins, adhesives, paints, resists, etc. are known as a technique that instantaneously undergoes a photopolymerization reaction to cure.
ＵＶ硬化樹脂は、一般的に、モノマー、オリゴマー、光重合開始剤と添加剤で構成される。ＵＶ光の照射を受けると、光重合反応開始剤がＵＶの照射によりラジカルを発生、重合のきっかけとなる。モノマー（液体）状態からポリマー（固体）状態に転換させる「光重合反応」を起す。光反応は励起された分子の反応で、熱反応は基底状態の分子の反応であって、普通の合成法では何段階も反応を重ねなければならないものが、光反応では波長によりエネルギーの選択が可能なため、光は有効なエネルギーの大量提供が可能。光は特定の反応を進め、ラジカル発生の量子効率が高くなり、高エネルギーを持った物質を合成できる。The UV curable resin is generally composed of a monomer, an oligomer, a photopolymerization initiator and an additive. When irradiated with UV light, the photopolymerization initiator generates radicals by UV irradiation and triggers polymerization. Initiates a “photopolymerization reaction” that converts the monomer (liquid) state to the polymer (solid) state. Photoreaction is a reaction of excited molecules and thermal reaction is a reaction of molecules in the ground state. In ordinary synthesis methods, reactions must be repeated in several steps, but in photoreactions, energy is selected depending on the wavelength. Because it is possible, light can provide a large amount of effective energy. Light advances specific reactions, increases the quantum efficiency of radical generation, and can synthesize materials with high energy.
これらのＵＶ硬化技術は、従来の熱乾燥などと比較すると硬化・乾燥までに至る時間が圧倒的に短く、溶剤等の使用量が飛躍的に削減される為、省エネ、省スペース、環境面に於いてその特性を発揮する。These UV curing technologies are overwhelmingly short in time to cure and dry compared with conventional heat drying, etc., and the amount of solvent used is drastically reduced, saving energy, saving space, and the environment. It demonstrates its characteristics.
その用途は、各種金属の接着プライマー、木製床コーティング、防錆コーティング、ポッティング紙の艶出し、フィルム艶消し、耐水性付与、屈折率調整、滑り防止、静電防止・導電性付与、防曇性付与、硬度付与（ハードコート）、耐熱性付与、滑性付与等接着など多岐にわたる。その用途によって樹脂の特性が多種多様に変化するのもＵＶ樹脂の特徴である。Applications include adhesion primer for various metals, wooden floor coating, rust-proof coating, matting of potting paper, matte film, water resistance, refractive index adjustment, anti-slip, anti-static / conductivity, anti-fogging Wide range of applications such as adhesion, hardness (hard coat), heat resistance, and lubricity. It is also a feature of UV resin that the properties of the resin vary depending on the application.
現状の連続繊維シート補強工法はコンクリート巻き立て工法や鋼板補強工法に比べても、ローコストで短期の工期で施工できる長所を持つ工法として知られている。The current continuous fiber sheet reinforcement method is known as a method that has the advantage that it can be constructed at a low cost and in a short period of time compared to the concrete winding method and the steel plate reinforcement method.
しかし、これらの連続繊維シート補強工法によれば、コンクリート構造物の劣化した柱や梁など欠損部分を補修・補強する工法として、コンクリート躯体に強化繊維シートを巻いて補修・補強することから、プライマー処理・エポキシ樹脂等の接着剤塗布、繊維シート粘着・複数層の重ね貼り、アミン等硬化剤の使用等、所要機材・仮設設備、所要人員、１日以上の硬化養生期間、雨休み露止まり等天候要因による樹脂の接着不良、施工時間・施工手順等多目の工数などなど、コスト負担に跳ねる問題点があった。However, according to these continuous fiber sheet reinforcement methods, as a method of repairing and reinforcing defective parts such as columns and beams that have deteriorated in concrete structures, a reinforcing fiber sheet is wound around the concrete frame to repair and reinforce it. Treatment / Applying adhesives such as epoxy resin, fiber sheet adhesion / stacking multiple layers, using curing agents such as amines, etc. Required equipment / temporary equipment, required personnel, curing curing period of 1 day or more, rain resting, etc. There were problems such as poor adhesion of the resin due to weather factors, a lot of man-hours such as construction time and construction procedures, etc.
さらに、接着用樹脂の硬化を促進するためアミン系の硬化剤に頼らざるを得ない問題があった。Furthermore, there is a problem that an amine-based curing agent must be relied upon to accelerate the curing of the adhesive resin.
本発明の目的は、上記問題を解決するための強化繊維シートＵＶ補強工法を提供することにある。The objective of this invention is providing the reinforcing fiber sheet UV reinforcement construction method for solving the said problem.
上記の課題を解決するには、本発明に係る強化連続繊維シートＵＶ補強工法およびＵＶ重合反応型複合繊維樹脂にて達成される。
要約すれば、本発明では、コンクリート躯体施工面に、常温硬化樹脂及び硬化剤を含浸塗布する、従来の工法に代わって、ＵＶ重合反応型樹脂のみを塗布する。アミン等硬化剤は使用しない。その上に強化繊維シートを含浸粘着させて、ＵＶを照射、一瞬に硬化を行う強化繊維シートＵＶ補強工法を提供する。In order to solve the above-described problems, the reinforced continuous fiber sheet UV reinforcing method and the UV polymerization reaction type composite fiber resin according to the present invention are achieved.
In summary, in the present invention, only the UV polymerization reaction type resin is applied to the concrete frame construction surface in place of the conventional method of impregnating and applying the room temperature curing resin and the curing agent. Do not use curing agents such as amines. Provided is a reinforcing fiber sheet UV reinforcing method in which a reinforcing fiber sheet is impregnated and adhered, UV is irradiated, and curing is performed instantaneously.
本発明に用いる強化連続繊維シートの繊維素材としては、炭素繊維・ガラス繊維・セラミックス繊維・ボロン繊維等の無機繊維、アラミド・ポリエステル・ポリエチレン・ナイロン・ビニロン・アクリル・ポリアセタール・ＰＢＯ・高強度ポリプロピレン・高強度ポリエチレン・ポリアミド・ポリカーボネート樹脂・ビニルエステル系樹脂等の有機繊維、チタン・スチール等の金属繊維から選択されるいずれかの繊維シートであるか、或いは、前記繊維を複数種混入して使用することができる。As the fiber material of the reinforced continuous fiber sheet used in the present invention, inorganic fibers such as carbon fiber, glass fiber, ceramic fiber, boron fiber, aramid, polyester, polyethylene, nylon, vinylon, acrylic, polyacetal, PBO, high-strength polypropylene, It is a fiber sheet selected from organic fibers such as high-strength polyethylene, polyamide, polycarbonate resin, vinyl ester resin, and metal fibers such as titanium and steel, or a mixture of a plurality of these fibers. be able to.
上記連続繊維シートは、繊維が編織成（構成）されている編物、織物あるいは不織布からなるか、シート状や格子状及びメッシュ状のいずれかであるか、或いは２軸〜４軸の格子状であるか、複数種混入し融合して使用するか、いずれであってもよい。The continuous fiber sheet is made of a knitted fabric, a woven fabric or a nonwoven fabric in which fibers are knitted (constructed), or is in the form of a sheet, lattice, or mesh, or in a biaxial to tetraaxial lattice. There may be either a plurality of types mixed together and used.
メッシュ状物としては、開口率が３０％以上の繊維あるいは複合糸による積層布で、補強効果のあるものが好ましい。The mesh-like material is preferably a laminated fabric made of fibers or composite yarns having an opening ratio of 30% or more and having a reinforcing effect.
連続繊維シートの厚みの基準として、１枚の目付重量が１００〜２０００ｇ／ｍ２のシートが好ましい。As a standard for the thickness of the continuous fiber sheet, a sheet having a basis weight of 100 to 2000 g / m 2 is preferable.
本発明に用いるＵＶ重合反応型樹脂は、補修・補強工事対象及び強化連続繊維シートとの親和性が高く、密着性を高める樹脂を優先する。エポキシ樹脂、ビニルエステル樹脂、不飽和ポリエステル樹脂、ポリエステル樹脂、ポリアミド樹脂、アクリル樹脂、ポリカーボネート樹脂、ウレタン樹脂、ウレア樹脂、又は、ＭＭＡ樹脂等のラジカル反応系樹脂から選択されるいずれかの樹脂であるか、或いは、前記樹脂をを複数種混入して使用することができる。選択されるいずれの樹脂も、ＵＶ重合反応型樹脂中成分である重合開始剤と相補性のよいものから選択されることが好ましい。The UV polymerization reaction type resin used in the present invention has a high affinity with the object of repair / reinforcement work and the reinforced continuous fiber sheet, and gives priority to a resin that improves adhesion. It is any resin selected from radical reaction resins such as epoxy resin, vinyl ester resin, unsaturated polyester resin, polyester resin, polyamide resin, acrylic resin, polycarbonate resin, urethane resin, urea resin, or MMA resin. Alternatively, a plurality of types of the above resins can be mixed and used. Any resin selected is preferably selected from those having good complementarity to the polymerization initiator which is a component in the UV polymerization reaction type resin.
又、繊維の粉体を液状ＵＶ重合反応型樹脂に混合、該繊維にＵＶ重合反応型樹脂を吸着させ、更に次いで長さが極小の繊維をサイズの小さいものから順次上記の液状ＵＶ重合反応型樹脂に加え混合してなることを特徴とするＵＶ重合反応型複合繊維樹脂を提供する。Also, the fiber powder is mixed with a liquid UV polymerization reaction resin, the UV polymerization reaction resin is adsorbed on the fiber, and then the above-mentioned liquid UV polymerization reaction type is sequentially applied to the smallest length fibers from the smallest size. Provided is a UV polymerization reaction type composite fiber resin characterized by being mixed with a resin.
次ぎに、以上の構成からなる補強構造を施工するための、本発明に係る補強工法の一実施形態について説明する。Next, an embodiment of a reinforcing method according to the present invention for constructing a reinforcing structure having the above configuration will be described.
本発明の第１は、請求項１に記載の、従来のコンクリート連続繊維シート補強工法において、常温硬化樹脂及び硬化剤を使用している代わりに、ＵＶ重合反応型樹脂のみを用い、硬化剤を使用せず、小型のＵＶ照射機にて、ＵＶを僅か数秒間程度照射することをもってなされることを特徴とする強化繊維シートＵＶ補強工法に関する。The first of the present invention is the conventional concrete continuous fiber sheet reinforcing method according to
本発明の第２は、請求項２に記載の、液状ＵＶＶ重合反応型樹脂に繊維の粉体を混合吸着させ、次いで長さが極小の繊維を、サイズの小さいものから順次上記の液状ＵＶ重合反応型樹脂に加え混合してなるＵＶ重合反応型複合繊維樹脂に関する。According to a second aspect of the present invention, fiber powder is mixed and adsorbed on the liquid UVV polymerization reaction type resin according to
更に上記ＵＶ重合反応型複合繊維樹脂に、焼却灰等のコンクリート骨材を混練・混合するＵＶ重合反応型複合繊維樹脂組成物を得てもよく、上記ＵＶ重合反応型複合繊維樹脂又はこのＵＶ重合反応型複合繊維樹脂組成物をコンクリート施工面に塗布、含浸、硬化を目視して、ＵＶ照射を行うものであることは言うまでもない。Further, a UV polymerization reaction type composite fiber resin composition in which concrete aggregates such as incinerated ash are kneaded and mixed with the UV polymerization reaction type composite fiber resin may be obtained. Needless to say, the reactive composite fiber resin composition is applied to the concrete construction surface, and UV irradiation is performed by visually observing the impregnation and curing.
本発明の第３は、請求項３に記載の、コンクリート橋脚外周の水中部分に発生する剥落等の橋脚補修・補強作業において、請求項１又は２に記載のＵＶＵＶ重合反応型複合繊維樹脂又はＵＶ重合反応型複合繊維樹脂組成物を水中吸着自走型多機能ロボットに、コンクリート橋脚外周の清掃・研磨・脱水・該複合繊維樹脂注入塗装・乾燥・移動作業を自動的に実行させ同時にＵＶ照射を行なわせることを持って特徴とする水中コンクリート補強工法に関する。A third aspect of the present invention is the UVUV polymerization reaction type composite fiber resin or UV according to
本発明の第４は、請求項４に記載の、可視光域でエネルギー吸収を持つ光増感剤を組み合わせてなるＵＶ（紫外線）重合反応型樹脂をいることを特徴とする請求項１の強化繊維シートＵＶ補強工法に関する。これは炭素繊維シート又はアラミド繊維シートのコンクリート施工面への含浸接着効果を更に高めるＵＶ重合反応型樹脂を用いる連続繊維シート方法に関する。A fourth aspect of the present invention is the reinforcement according to
本発明の効果は、施工手順簡略化の要員減及び１日以上の硬化養生期間や天候要因（雨休み露止まり等）など施工時間短縮による工数縮減のみならず、硬化溶剤の無機化（非アミン化）が可能となる強化繊維シートＵＶ補強工法を提供する。The effects of the present invention include not only the reduction of man-hours for simplification of construction procedures, but also reduction of man-hours due to shortening of construction time such as curing curing period of 1 day or more and weather factors (rain stop, etc.), as well as mineralization of curing solvent (non-amine) Reinforced fiber sheet UV reinforcement construction method that can be realized) is provided.
また、ＵＶランプは、小型軽量で、１００Ｖ電源でどのような場所でも使用でき、取り扱い操作が簡単、特別の技術を要しない。Further, the UV lamp is small and light, can be used in any place with a 100 V power source, is easy to handle, and does not require any special technology.
以下に実施例を挙げて本発明を説明するが、本発明はこれにより何等限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.
本実施例は、コンクリート剥落等への連続繊維シート補修・補強方法における、従来の常温硬化樹脂に硬化剤を用いる樹脂硬化法と同じように、コンクリート平板を施工面としてＵＶ重合反応型樹脂を塗布ビニロン繊維メッシュシートを貼り、含浸させた上を、ＵＶを当てる実験してみたところ、バインダーが格子目を固定、セメントの食い付きが良く、しかも極めて安定して強度と弾性の高さを見ることができた。In this example, a UV polymerization reaction type resin is applied to a concrete plate as a construction surface in the same manner as a conventional resin curing method using a curing agent for a normal temperature curing resin in a continuous fiber sheet repair / reinforcement method for concrete peeling, etc. After experimenting to apply UV on the impregnated vinylon fiber mesh sheet, the binder fixes the lattice, the cement bite is good, and the strength and elasticity are very stable. I was able to.
実施例１ コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面を３つに区切って、２０℃における粘度が５００ｃｐｓのＵＶ重合反応型合成樹脂（アクリル系、（株）アシレ社製）を、平板表面を３ヶ所に上塗りし、１つの面には、１方向、２００ｇ目付巾５０ｃｍ５０ｍ巻きのカーボン繊維シート（前田織工株式会社製）を粘着し、２つの面には、縦横２方向巾１００センチのアラミド繊維（トワロン）シート（前田織工株式会社）を粘着、３つの面には、巾１００センチのビニロン繊維メッシュシートを粘着、続いて何れの表面にも、ＵＶ照射機（１．２ｋｇ、出力ＵＶ波長３６５ナノメートル、（株）アシレ社製）でＵＶを照射したところ、カーボン繊維シートやアラミド繊維（トワロン）シートはシート下の樹脂がシートの網目に含浸しているものの、固化は緩い状態。ビニロン繊維メッシュシートは瞬間的に固化した。Example 1 A specimen surface of a concrete flat plate (length 30 cm, width 30 cm, width 5 cm) was divided into three parts, and a UV polymerization reaction type synthetic resin (acrylic, manufactured by Asile Co., Ltd.) having a viscosity of 500 cps at 20 ° C. was obtained. The surface of the flat plate is overcoated at three locations, and a carbon fiber sheet (made by Maeda Oriko Co., Ltd.) wound in one direction with a width of 50 cm and a weight of 50 m is adhered to one surface, and the two surfaces have a width of 100 in both vertical and horizontal directions. Adheres centimeter aramid fiber (Twaron) sheet (Maeda Oriko Co., Ltd.), adheres 100 cm wide vinylon fiber mesh sheet on three sides, and then applies UV irradiation machine (1.2 kg) to any surface When UV irradiation is performed with an output UV wavelength of 365 nanometers (manufactured by Asile Co., Ltd.), the resin under the sheet of the carbon fiber sheet or aramid fiber (Twaron) sheet is But it is impregnated into the door of the mesh, solidifying the loose state. The vinylon fiber mesh sheet solidified instantaneously.
実施例２ コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面の半分に、予め２０℃における粘度が５００ｃｐｓのアクリル系ＵＶ反応型樹脂２００ｇ（株）アシレ社製）に炭素繊維粉体１ｇ及び長さが３ミリの炭素繊維１ｇを混和したＵＶ反応型合成樹脂組成物を、平板面に上塗りし、直後にＵＶ照射したところ、上記合成樹脂組成物の皮膜は供試体表面で一瞬固まったが、該皮膜はコンクリートの表層をはぎ取り捲れ上った。Example 2 On a half of the surface of a concrete flat plate (length 30 cm, width 30 cm, width 5 cm), an acrylic UV-reactive resin 200 g having a viscosity at 20 ° C. of 500 cps in advance (produced by Asile Co., Ltd.) 1 g When a UV-reactive synthetic resin composition mixed with 1 g of carbon fiber having a length of 3 mm was overcoated on a flat plate surface and then immediately irradiated with UV, the synthetic resin composition film solidified momentarily on the surface of the specimen. The film peeled off the surface layer of the concrete.
同様に、上記コンクリート平板（縦３０ｃｍ横３０ｃｍ幅５ｃｍ）の供試体表面の他の半分に、予め２０℃における粘度が５００ｃｐｓのアクリル系ＵＶ反応型樹脂２００ｇ（株）アシレ社製）に、ビニロン繊維長さ０．５ｍｍ１ｇを混和、平板面に上塗りし、直後にＵＶ照射したところ、該ＵＶ反応型合成樹脂組成物の皮膜は硬化、コンクリートの表層に強く接着する成果を得た。
上記両実施例：２０１０年１０月２０日午前１０時日本開発（株）都筑事務所Similarly, on the other half of the surface of the test piece of the above concrete flat plate (length 30 cm, width 30 cm, width 5 cm), an acrylic UV-reactive resin 200 g having a viscosity of 500 cps in advance at 20 ° C. (manufactured by Asile Co., Ltd.) and vinylon fiber When 0.5 g and 1 g of length were mixed, a flat plate surface was overcoated, and UV irradiation was performed immediately thereafter, the film of the UV-reactive synthetic resin composition was cured and obtained a result of strongly adhering to the concrete surface layer.
Both above examples: October 20, 2010, 10:00 am Japan Development Co., Ltd. Tsuzuki Office
実施例１について、ＵＶ重合反応型合成樹脂は、アクリル系の樹脂であり、使用した樹脂の塗布量も薄かったせいもあり、炭素繊維シートの接着は十分とは言えなかった。
アラミド繊維シートもほぼ同様である。しかし、ビニロン繊維シートにあっては、２方向のメッシュ状で菱形格子を構成しており、自己含浸力があり、粘着、強度に問題のないことが分かっ。樹脂バインダーが、メッシュ格子目を固定、セメントの食い付きも良く、ビニロン繊維シートの粘着強度と弾性の高さを見せつけた。Regarding Example 1, the UV polymerization reaction type synthetic resin was an acrylic resin, and the amount of the resin used was also thin, and the carbon fiber sheet was not sufficiently adhered.
The same applies to the aramid fiber sheet. However, in the vinylon fiber sheet, it is found that the rhombus lattice is formed in a mesh shape in two directions, has a self-impregnation force, and there is no problem in adhesion and strength. The resin binder fixed the mesh lattice, and the bite of the cement was good, showing the adhesive strength and elasticity of the vinylon fiber sheet.
連続繊維シートのメッシュ状物としては、開口率が３０％以上の繊維か、あるいは複合糸による積層布か、更には、２軸積層布か３軸積層シートである方が、上塗り樹脂、下塗り樹脂共にメッシュ状物に侵入し易く高い決着度を効果得た。The continuous fiber sheet mesh-like material is a fiber having an opening ratio of 30% or more, or a laminated cloth made of composite yarn, and moreover, a biaxial laminated cloth or a triaxial laminated sheet is used as a top coat resin or undercoat resin. Both of them easily penetrated into mesh-like objects and achieved a high degree of settlement.
実施例２については、ＵＶ重合反応型樹脂に硬化用の微細な炭素繊維を混和しコンクリート平板表面に塗布したところ、捲れ上がった。その捲れた面にはコンクリートの表層が強く付着していた。このことから付着強度は問題ないことが分かった。ただ、付着面に一層の強度があれば、捲れ上がらずに強く決着する可能性が考えられた。ＵＶ重合反応型樹脂組成物の樹脂塗布量（皮膜の厚さ）を増やすことが好ましいことが分かる。About Example 2, when fine carbon fiber for hardening was mixed with UV polymerization reaction type resin, and it apply | coated to the concrete flat plate surface, it drowned. The concrete surface was strongly adhered to the drowned surface. This indicates that there is no problem with the adhesion strength. However, there was a possibility that if the adhesion surface had a higher strength, it could be strongly settled without rolling up. It turns out that it is preferable to increase the resin application amount (film thickness) of the UV polymerization reaction type resin composition.
上記ＵＶ重合反応型樹脂はアクリル系であるが、これをエポキシ系ＵＶ重合反応型合成樹脂に代えた試験を行う必要性を感じた。Although the UV polymerization reaction type resin is acrylic, it was felt that it was necessary to perform a test in which this was replaced with an epoxy UV polymerization reaction type synthetic resin.
ビニロン繊維長さ０．５ｍｍ１ｇを混和したＵＶ重合反応型合成樹脂組成物は、ＵＶ照射により、皮膜が硬化、コンクリート表層の付着強度には問題がないことが分かった。It was found that the UV polymerization reaction type synthetic resin composition mixed with vinylon fiber length of 0.5 mm 1 g was cured by UV irradiation, and there was no problem in the adhesion strength of the concrete surface layer.
実施例１、実施例２共に、アクリル系ＵＶ重合反応型合成樹脂を使用しており、これではビニロン繊維メッシュシートの接着は決まったが、炭素繊維シート及びアラミド系繊維シートにおいては、含浸性の高いエポキシ系ＵＶ重合反応型合成樹脂を、厚く塗布すれば十分接着度は向上すると伺わせた。In both Example 1 and Example 2, an acrylic UV polymerization reaction type synthetic resin was used, and in this case, the adhesion of the vinylon fiber mesh sheet was determined. However, in the carbon fiber sheet and the aramid fiber sheet, the impregnating property was determined. It was said that the adhesion degree would be improved sufficiently if a high epoxy UV polymerization reaction type synthetic resin was applied thickly.
本発明者は、少なくとも実施例１及び実施例２において、ビニロン繊維メッシュシートは自己含浸があり、好ましい接着硬化が得られたと分かり、本実施例のコンクリート剥落等に対する連続繊維シート補修・補強方法において、ＵＶ重合反応型合成樹脂を用いることで施工性が格段に向上することを見出した。カーボン繊維及びアラミド繊維シートの強い粘着を達成する構成要素の組み合わせについて、強い可能性を得た。The present inventor found that at least in Example 1 and Example 2, the vinylon fiber mesh sheet had self-impregnation, and that preferable adhesive curing was obtained, and in the continuous fiber sheet repair and reinforcement method for concrete peeling and the like of this example It was found that workability is remarkably improved by using a UV polymerization reaction type synthetic resin. Strong possibilities were obtained for the combination of components that achieve strong adhesion of carbon fiber and aramid fiber sheets.
本発明は、コンクリート構造物、例えば、橋梁（橋脚、床板、桁）、トンネル、高架車道、高速道路裏面、橋梁、建物柱・桁、外壁、ＲＣ煙突、電柱、上下水道ヒューム管、給水槽、桟橋床板、建築物スラブ、パース岸壁のコンクリート構造物の構築及び補強等の用途に適用できる。The present invention is a concrete structure, for example, a bridge (bridge pier, floor board, girder), tunnel, elevated carriageway, rear surface of highway, bridge, building column / girder, outer wall, RC chimney, utility pole, water and sewage fume pipe, water tank, It can be applied to the construction and reinforcement of pier floor boards, building slabs, and concrete structures on Perth quay.
図１において符号１は、コンクリート構造物のひび割れや剥落等の存在する橋梁の橋脚を指し、符号２は橋梁の桁である。従来の連続繊維シート補強工法において、これらコンクリート躯体施工面へ、カレン、プライマー処理を行い、その場でエポキシ樹脂等の接着剤とアミン等硬化剤を混合して塗布、その上にカーボン繊維シート等連続繊維シートを張って含浸させ、硬化度合いを目視しながら、更に連続繊維シートを複数層重ね貼り、１日以上の硬化養生期間を取るなどする連続繊維シート補強工法が定着している。In FIG. 1, the code |
本発明は、従来の常温硬化樹脂と硬化剤を混合して塗布する方式に代えて、ＵＶ重合反応型樹脂のみを塗布・含浸させ、そこにＵＶを当てるだけの簡略な樹脂硬化工法を特徴とする強化繊維シートＵＶ補強工法である。The present invention is characterized by a simple resin curing method in which only a UV polymerization reaction type resin is applied and impregnated and UV is applied thereto instead of a conventional method of mixing and applying a normal temperature curing resin and a curing agent. This is a reinforcing fiber sheet UV reinforcing method.
１ 橋梁の橋脚 ２ 橋梁の桁1
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| JP2016017120A (en) * | 2014-07-07 | 2016-02-01 | 新日鉄住金マテリアルズ株式会社 | Mesh-like fiber-reinforced composite material |
| CN108755453A (en) * | 2018-06-06 | 2018-11-06 | 石家庄铁道大学 | A kind of water punching is damaged the composite reinforcement structure and its reinforcement means of bridge pier |
| CN110424278A (en) * | 2019-07-22 | 2019-11-08 | 山东大学 | A kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring |
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2010
- 2010-11-02 JP JP2010258327A patent/JP2012097547A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344560A (en) * | 2013-07-19 | 2013-10-09 | 郑州大学 | Method for testing interface bond behavior of CFRP (carbon fiber reinforced polymer) cloth-concrete based on beam specimen |
| JP2016017120A (en) * | 2014-07-07 | 2016-02-01 | 新日鉄住金マテリアルズ株式会社 | Mesh-like fiber-reinforced composite material |
| CN108755453A (en) * | 2018-06-06 | 2018-11-06 | 石家庄铁道大学 | A kind of water punching is damaged the composite reinforcement structure and its reinforcement means of bridge pier |
| CN108755453B (en) * | 2018-06-06 | 2020-06-30 | 石家庄铁道大学 | Combined reinforcing structure of water-washed damaged pier and reinforcing method thereof |
| CN110424278A (en) * | 2019-07-22 | 2019-11-08 | 山东大学 | A kind of construction method of the pre-stressed carbon fiber plate reinforcement of distributed anchoring |
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