JP4287860B2 - Repair and reinforcement methods for concrete structures using photo-curing fiber reinforced resin sheets - Google Patents

Description

The present invention relates to a photocurable fiber reinforced resin sheet (hereinafter sometimes referred to as a photocurable FRP sheet) that cures and adheres when receiving ultraviolet light, and a jelly-like product of a photocurable resin (hereinafter simply referred to as a jelly-like product). Belongs to the technical field of a method of repairing and reinforcing the concrete structure by applying it to the surface of the concrete structure where repair is necessary and curing it by applying ultraviolet light to bond it. For example, the present invention relates to a method for repairing / reinforcing a concrete structure using a photocurable fiber-reinforced resin sheet that has high adhesive strength and peel strength, and is excellent in workability and economy.

Conventionally, a concrete structure has a problem in construction that a so-called junker that separates cement and aggregates due to insufficient mixing, or a so-called cold joint of a jointed portion, occurs as a defective part, and cracking or peeling occurs. , falling, etc. that has become a serious problem. Therefore, a photocurable FRP sheet that cures and adheres to ultraviolet light is applied to the repair-necessary areas as described above, and pressure is applied to the photocurable FRP sheet to bring it into close contact with the concrete surface. A method of repairing and reinforcing by bonding is implemented. However, the photo-curing type FRP sheet cannot be easily adapted to the surface of rough concrete, and the adhesive strength and peel strength are weak due to poor contact, and may be peeled off. Therefore, for example, in the repair / reinforcement method disclosed in Patent Document 1 below, a resin is applied to the concavo-convex portion of the concrete surface before the photocurable FRP sheet is applied to the repaired portion of the concrete structure. It is described that the adhesive strength of the photo-curable FRP sheet is increased by curing after smoothing with a spatula or the like and smoothing the concavo-convex portion.

In the repair / reinforcement method disclosed in Patent Document 2, a porous sheet-like body is applied to a concrete structure where repair is necessary, and the injection port is opened with a drill or the like on a light-cured FRP sheet that is adhered and cured from above. It is described that a curable liquid is injected and cured from the injection port over the details of a defective part such as a cracked part or a peeled part to repair and reinforce.
JP 2003-175515 A JP 2004-150238 A

  The repairing / reinforcing method of Patent Document 1 is time-consuming because the photo-curable FRP sheet is bonded after the resin is applied to the surface of the concrete structure and smoothed and cured. In addition, since the photocurable FRP sheet cannot be applied until the resin applied to the concrete structure is cured to some extent, the construction period is prolonged, and the workability and economy are poor. In addition, the resin usually used as putty is colored, and there is a problem that after application and curing, cracks and the like cannot be confirmed.

The repair / reinforcement method of the above-mentioned Patent Document 2 is such that a porous sheet-like body is applied, a hole is provided in a bonded photocurable FRP sheet with a drill or the like, and a curable liquid is injected from the hole. Is awkward and troublesome. In addition, since the curable liquid cannot be injected until the photocurable FRP sheet is cured, workability is also poor. Moreover, against the porous sheet body concrete surface it has required that the cormorants, De Ki such have adhering the photocurable FRP sheets adhesion failure or aging peeling in the same way again.

The object of the present invention is to apply unevenness on the concrete surface by applying a photo-curable synthetic resin jelly-like material, apply a photo-curable fiber reinforced resin sheet thereon, and irradiate with ultraviolet rays to increase the adhesive strength and the peel strength is increased, moreover it is to provide Ru excellent workability and economy, the repair and reinforcement method of the concrete structure using a photocurable fiber-reinforced resin sheet.

  An object of the present invention is to provide a method for repairing / reinforcing a concrete structure using a photocurable fiber reinforced resin sheet, which can repair and reinforce a photocurable fiber reinforced resin sheet which has been poorly bonded or has been peeled off over time. It is.

A repair / reinforcement method for a concrete structure using a photocurable fiber-reinforced resin sheet according to the invention described in claim 1 ,
The photocurable fiber reinforced resin sheet 1 that cures and adheres when receiving ultraviolet rays is applied to the surfaces of the concrete surface 10 of the concrete structure 4 that need repair, and the photocurable fiber reinforced resin sheet 1 is applied to the photocurable fiber reinforced resin sheet 1. In the method of applying pressure to adhere to the concrete surface 10 and irradiating with ultraviolet rays to bond and repair,
Apply the photocurable resin jelly-like material 2 to the surfaces of the concrete structure 4 where repair is required 6, 7 to level the unevenness of the concrete surface 10, and apply the photocurable fiber reinforced resin sheet 1 on it. After that, the sheet is heated to a plasticizing temperature and softened to a plasticized state , or before being applied, the photocurable fiber reinforced resin sheet 1 is heated to a plasticizing temperature and softened to a plasticized state. After that , the sheet 1 is applied to the concrete surface 10 to which the jelly-like material 2 is applied , the pressure is applied to the sheet 1, and the light-curable resin jelly-like material 2 is pressed against the unevenness of the concrete surface 10 while the sheet 1 is applied to the concrete. The sheet 10 and the photocurable resin jelly-like product 2 are cured by being irradiated with ultraviolet rays and adhered to the concrete surface 10 to be repaired and reinforced.

A method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to the invention described in claim 2 is:
The photocurable fiber reinforced resin sheet 1 that cures and adheres when receiving ultraviolet rays is applied to the surfaces of the concrete surface 10 of the concrete structure 4 that need repair, and the photocurable fiber reinforced resin sheet 1 is applied to the photocurable fiber reinforced resin sheet 1. In the method of applying pressure to adhere to the concrete surface 10 and irradiating with ultraviolet rays to bond and repair,
The curable resin jelly-like material 2 is applied to the surface of the concrete structure 4 where repair is required 6, 7 to level the unevenness of the concrete surface 10, and the photocurable fiber reinforced resin sheet 1 is applied thereon. Then, pressure and vibration are applied to the sheet 1, and the jelly-like product 2 of the photocurable resin is pressed against the irregularities of the concrete surface 10 to bring the sheet 1 into close contact with the concrete surface 10, and the sheet 1 and the photocurable resin The jelly-like product 2 is cured by irradiating with ultraviolet rays, and is bonded to the concrete surface 10 to be repaired and reinforced.

A method for repairing / reinforcing a concrete structure using a photocurable fiber-reinforced resin sheet according to the invention described in claim 3 ,
The photocurable fiber reinforced resin sheet 1 that cures and adheres when receiving ultraviolet rays is applied to the surfaces of the concrete surface 10 of the concrete structure 4 that need repair, and the photocurable fiber reinforced resin sheet 1 is applied to the photocurable fiber reinforced resin sheet 1. In the method of applying pressure to adhere to the concrete surface 10 and irradiating with ultraviolet rays to bond and repair,
Apply the photocurable resin jelly-like material 2 to the surfaces of the concrete structure 4 where repair is required 6, 7 to level the unevenness of the concrete surface 10, and apply the photocurable fiber reinforced resin sheet 1 on it. After that, the sheet is heated to a plasticizing temperature and softened to a plasticized state , or before being applied, the photocurable fiber reinforced resin sheet 1 is heated to a plasticizing temperature and softened to a plasticized state. After that , the sheet 1 is applied to the concrete surface 10 to which the jelly-like material 2 is applied , and the sheet 1 is pressed against the unevenness of the concrete surface 10 by applying pressure and vibration to the sheet 1 and pressing the photo-curable resin jelly-like material 2 against the unevenness of the concrete surface 10. The sheet 1 and the photo-curable resin jelly-like product 2 are cured by being irradiated with ultraviolet rays and adhered to the concrete surface 10 to be repaired and reinforced.

Invention of Claim 4 in the repair and reinforcement method of the concrete structure using the photocurable fiber reinforced resin sheet as described in any one of Claims 1-3 ,
A reinforcing material 5 such as a wire mesh is applied to the repair-necessary portions 6 and 7 of the concrete structure 4, a jelly-like material 2 of a photocurable resin is applied on the reinforcing material 5, and a photocurable type is applied thereon. Applying the fiber reinforced resin sheet 1 or applying the reinforcing material 5 to the repair required portions 6 and 7 of the concrete structure 4, applying the photocurable resin jelly-like material 2 on the reinforcing material 5, Apply the reinforcing material 5 again on the jelly-like material 2 and apply the photo-curable fiber reinforced resin sheet 1 on it, or jelly-like resin of the photo-curable resin to the repair required portions 6 and 7 of the concrete structure 4. The object 2 is applied, the reinforcing material 5 is applied thereon, the photocurable fiber reinforced resin sheet 1 is applied thereon, and the photocurable fiber reinforced resin sheet 1 and the photocurable resin jelly form are applied. Curing the product 2 by irradiating it with ultraviolet rays Repair is adhered to preparative surfaces 10, characterized by reinforcing.

The invention described in claim 5 is a method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 1 to 4 ,
The photocurable fiber reinforced resin sheet 1 has one end applied to the concrete surface 10, pressure is sequentially applied to the other end, and the photocurable resin jelly applied to the concrete surface 10 in advance is in a jelly form. It is characterized by closely contacting the object 2 while pressing it.

The invention described in claim 6 is a method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to claim 1, 4 or 5 ,
The photocurable fiber reinforced resin sheet 1 is characterized by being pressed by a pressing roller 8 and applying a necessary pressure.

The invention described in claim 7 is a method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 2 to 5 ,
Applying pressure and vibration to the photocurable fiber reinforced resin sheet 1 at the same time, or applying pressure to the photocurable fiber reinforced resin sheet 1 and then applying vibration to the sheet 1 and the photocurable resin jelly-like product 2 It is characterized by being closely attached to the concrete surface 10.

The invention described in claim 8 is a method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to claim 2 or 3 or 4 or 5 or 7 .
The photocurable fiber reinforced resin sheet 1 is characterized by applying vibration to the photocurable fiber reinforced resin sheet 1 by vibrating the pressing roller 8 with a vibrator.

The invention described in claim 9 is a method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 1 to 8 ,
When the photocurable fiber reinforced resin sheet 1 or the photocurable resin jelly-like product 2 is brought into close contact with the surface 10 of the repair required portions 6 and 7 of the concrete structure 4 by applying pressure or applying pressure and vibration. Simultaneously, ultraviolet rays are irradiated to cure the photocurable fiber resin sheet 1 and the photocurable resin jelly-like product 2.

The invention described in claim 1 0, in the repair and reinforcement method of the photocurable fiber-reinforced resin sheet concrete structure using as claimed in any one of claims 1-8,
The photocurable fiber reinforced resin sheet 1 or the photocurable resin jelly-like product 2 was brought into close contact with the surface 10 of the repair required portions 6 and 7 of the concrete structure 4 by applying pressure or applying pressure and vibration. The photocurable fiber resin sheet 1 and the photocurable resin jelly-like product 2 are cured by irradiating ultraviolet rays immediately afterwards.

The invention described in claim 1 1, in the repair and reinforcement method of claim 1 to 1 0 concrete structure that uses photocurable fiber-reinforced resin sheet according to any one of,
A room temperature curable resin or ultraviolet light is applied from the outside of the photocurable fiber reinforced resin sheet 1 to the peeled portion 11 of the photocurable fiber reinforced resin sheet 1 adhered to the surface 10 of the repair required portions 6 and 7 of the concrete structure 4. A jelly-like material 13 containing a liquid photocurable resin that cures upon irradiation is injected to fill the voids in a closed chamber, and the jelly-like material 13 is cured at room temperature or by irradiating with ultraviolet rays, so that the surface 10 of the concrete structure 4 can be cured. It is characterized by adhering to.

The invention described in claim 1 2, in the repair and reinforcement method of claim 1 to 1 0 concrete structure that uses photocurable fiber-reinforced resin sheet according to any one of,
The light-curable resin jelly-like material 2 is applied to the surfaces of the concrete structures 4 where repair is required, and the surface of the concrete surface 10 is smoothed. While preventing sag of the curable resin jelly-like product 2, ultraviolet rays are irradiated onto the photo-curable resin jelly-like product 2 from above the coating film to prevent the photo-curable resin jelly-like product 2 from sagging. After curing to a certain extent and peeling off the coating film, the photocurable fiber reinforced resin sheet 1 is applied onto the jelly-like product 2 of the photocurable resin, and the photocurable fiber reinforced resin sheet 1 and the photocurable resin The resin jelly-like product 2 is irradiated with ultraviolet rays to be cured and bonded to the concrete surface 10 to be repaired and reinforced.

The invention described in claim 1 3, in the repair and reinforcement method of the concrete structure using a photocurable fiber-reinforced resin sheet according to any one of claims 1 to 1 2,
Irradiation of ultraviolet rays is performed with ultraviolet intensity and moving speed that satisfy the accumulated amount of ultraviolet rays necessary to sufficiently cure the photocurable fiber reinforced resin sheet 1 and the photocurable resin jelly-like product 2 and to secure adhesive strength. Irradiation is performed while moving the source.

According to repair and reinforcement method of the concrete structure using a photocurable fiber-reinforced resin sheet according to the present invention, the concrete surface by applying a jelly-like material 2 to the surface of the repair necessary portions 6,7 of the concrete structure 4 10 unevenness is leveled, and a photo-curable FRP sheet 1 is applied thereon, and pressure is applied to the sheet 1 to press the jelly-like material 2 against the unevenness of the concrete surface 10 to bring the sheet 1 into close contact with the ultraviolet rays. irradiation to Runode, the jelly-like material 2 which has been coated upcoming Ikiwata to detail of the rough concrete surface 10 with irregularities. That is, the air inside the unevenness of the concrete surface 10 can be defoamed with the jelly-like material 2 , and the photocurable FRP sheet 1 can be securely adhered to the concrete surface 10 and cured, and as a result, the adhesive strength And the peel strength increases. Moreover, jelly-like material 2, since the cured by irradiation with ultraviolet rays with the photocurable FRP sheet 1, as compared with adhering the photocurable FRP sheet 1 after complete smoothing the concrete surface 10, The construction period can be greatly shortened and the workability and economic efficiency are excellent.

Also, a jelly-like material 13 containing a liquid of a photocurable resin or a photocurable resin that cures when irradiated with ultraviolet rays from the outside of the photocurable FRP sheet 1 (11) separated from the surface 10 of the concrete structure 4 is injected. Te buried tightly actual voids, since the cured by irradiation with ambient temperature or UV the jelly-like material 13, for example, detached from the concrete surface 10 already adhered to photocurable FRP sheet 1 is adhesive failure or aging peeling However, it can be easily and immediately bonded to the concrete surface 10 for repair and reinforcement.

First , the basic concept of a concrete structure repair and reinforcement method using a photocurable FRP sheet according to the present invention will be described with reference to the drawings.
FIG. 1 shows a form before use of the photocurable FRP sheet 1 used in the present invention. Reference numeral 1 in FIG. 1 is a photocurable FRP sheet (thickness of about 2 mm), and reference numeral 3 is a translucent coating film (thickness of about 1 mm) that covers and protects the surface of the photocurable FRP sheet 1. is there.

  The main constituent material of the photocurable FRP sheet 1 used in the present invention is, for example, a polyester resin. It is reinforced by impregnating it with continuous fibers such as glass fibers, and has sufficient strength for repair and reinforcement. Further, it contains a photopolymerization initiator that reacts and decomposes when absorbing ultraviolet rays, a monomer that reacts with the decomposed photopolymerization initiator, an oligomer, various additives, and the like.

The photocurable FRP sheet 1 is plasticized and softened when heated to, for example, about 80 ° C. to 100 ° C. Further, when ultraviolet rays are irradiated by an ultraviolet irradiation device 9 or the like, which will be described later, the photopolymerization initiator reacts and decomposes, reacts with resin components such as monomers and oligomers, and this reaction product is linked with the resin components. the reaction was molecular weight turned into hard to increase, exhibiting adhesive performance. The covering films 3 and 3 are for protecting the adhesive surface of the photocurable FRP sheet 1 from ultraviolet rays before use, and in use, the covering film 3 on the adhesive surface side is peeled off to provide a concrete structure. Affix to the surface 10 of the object 4. The front surface side covering film 3 is left until the adhesive operation of the photocurable FRP sheet 1 is completed.

FIG. 2 illustrates a cross-sectional view of a concrete structure 4 that needs repair and reinforcement. Concrete test of the presence or absence of repair necessary portions 6, 7 are confirmed, for example, the concrete surface 10 is performed using the imaging device, such as a high definition camera, a digital camera, an optical camera, the internal concrete, which was detected using an infrared sensor or to determine another particular temperature based on the structure 4, or the concrete surface 10 by hitting with a mallet or the like, to identify and determine based on the hammering sound. When Thus, determine by the naked eye, specific hard to early stage or internal repairs necessary part 6, for example Janka 6, or the presence or progress of cracking 7 can be precisely and by determine specific. Therefore, necessary repair and reinforcement measures can be performed at an early stage, and deterioration of the concrete structure 4 can be suppressed and prevented at an early stage.

Upon repair of the camera or the like of the imaging device repaired requiring point 6 and 7 and to determine another particular at or infrared sensors to determine different based on the temperature measured by specified repaired necessary portions 6, 7, in the concrete surface 10 If dirt, foreign matter, etc. are attached, the adhesive strength of the photocurable FRP sheet 1 is lowered. First, these dirt, foreign matter, etc. are cleaned cleanly in advance.

FIG. 3 shows a stage where the unevenness of the concrete surface 10 is smoothed by first applying the photocurable resin jelly-like material 2 to the surfaces 10 of the repaired portions 6 and 7 of the cleaned concrete structure 4. The main constituent material of the jelly-like product 2 is substantially the same as that of the above-described photocurable FRP sheet 1. In other words, when it is irradiated with ultraviolet rays, it immediately cures within a few seconds and exhibits adhesive performance. The jelly-like product 2 achieves the object of the present invention even if it is implemented as a configuration in which continuous fibers such as glass fibers are impregnated and reinforced, or a configuration in which continuous fibers such as glass fibers are not impregnated. I can.
The photocurable resin jelly-like product 2 is packaged in a structure that prevents the invasion of ultraviolet rays, is carried into the site, and is quickly applied to the concrete surface 10 when the packaging is unpacked at the site. When the jelly-like product 2 is applied to the repair required places 6 and 7 of the concrete structure 4, as shown in FIG. 4, for example, wire mesh or carbon fiber, aramid fiber, glass fiber on the surfaces of the repair required places 6 and 7 By applying a single-wire or mesh-like reinforcing material 5 such as vinylon fiber (however, it may be fixed by a fixing means such as a bolt or an adhesive), and by applying the jelly-like material 2 while entraining it, The strength of the repaired and reinforced concrete structure 4 can be increased (the invention according to claim 4 ).

Next, FIG. 5 shows a stage in which the photocurable FRP sheet 1 is applied and adhered to the jelly-like object 2 applied to the repair-necessary places 6 and 7 of the concrete structure 4. The photocurable FRP sheet 1, similarly to the jelly-like material 2 is carried into the field by wrapping with structure that prevents the UV penetration. When unpacking at the site, it is quickly cut into an optimum size and shape according to the width and shape of the specified repair-required points 6 and 7 before use. The photocurable FRP sheet 1 can be easily cut with, for example, scissors, a cutter, etc., and can be cut on-site as necessary, which is convenient. In addition, it is economical because it can be cut to the minimum necessary size while confirming the size of the necessary repair locations 6 and 7 on site.

The photocurable FRP sheet 1 cut into a size and shape necessary or effective for repairing is peeled off only the coating film 3 on the adhesive side surface, and the surface is quickly applied from the top of the jelly-like product 2 that has been applied in advance. Place it on the concrete surface 10 where repair is required. It is more effective to apply the reinforcing material 5 on the jelly-like product 2 and apply the photo-curable FRP sheet 1 to the reinforcing material 5 (the invention according to claim 4 ). The photocurable FRP sheet 1 thus applied is pressed against the irregularities of the concrete surface 10 by applying a necessary and sufficient pressure using the pressing roller 8 and the photocurable FRP sheet 1. 1 is pressed against the concrete surface 10 to bring it into close contact (invention of claim 6 ). By using the pressing roller 8 having a concavo-convex surface, the pressing roller 8 can be more closely fitted to the concrete surface 10 and effectively adhered thereto. Further, it may be brought into close contact with a wooden mallet. In this way, the jelly-like product 2 can reach the details of the concrete surface 10 with rough irregularities, the air inside the irregularities can be degassed without any problem, and the photocurable FRP sheet 1 is securely adhered to the concrete surface 10. Can do.

As shown in FIG. 6, one end of the photocured FRP sheet 1 is applied to the concrete surface 10, pressure is sequentially applied toward the other end, and the jelly-like material previously applied to the concrete surface 10 is applied. When the two are pressed and sequentially brought into close contact, the photocurable FRP sheet 1 and the jelly-like product 2 can be brought into close contact with the concrete surface 10 more effectively (the invention according to claim 5 ).

FIG. 7 shows the stage of irradiating the photocurable FRP sheet 1 and the jelly-like product 2 adhered to the concrete surface 10 by the above treatment with ultraviolet rays. This ultraviolet irradiation is performed by installing an ultraviolet irradiation device 9 (ultraviolet light source) that emits ultraviolet light to a position in front of the concrete surface 10 where the photocurable FRP sheet 1 and the jelly-like object 2 are in close contact, and the photocurable FRP sheet 1 and the ultraviolet light-curable resin of the ultraviolet integrated amount required to jelly-like material 2 is sufficiently cured to secure the adhesive strength (about 2000mJ ^/ cm ² ~6000mJ ^/ cm 2 or so) and UV intensity satisfying moving speed Irradiation is performed while moving the irradiation device 9. About 2000mJ ^/ cm ² ~6000mJ ^/ cm 2 about ultraviolet accumulated amount is required to fully cure the jelly-like material 2 photocurable FRP sheet 1 and the light-curable resin, for example, 350nm is the wavelength region of ultraviolet Using an industrial ultraviolet irradiation device such as a rod-shaped metal halide lamp or a rod-shaped mercury lamp, an ultraviolet irradiation intensity of about 300 mW / cm ^{2 is} about 1.0 m / min for one-way and 2.0 m for reciprocation. moved at / min about the moving speed can be met by irradiating with (the invention of claim 1 3 wherein). Then, the irradiation of ultraviolet rays can secure a certain amount of accumulated ultraviolet rays for the photocurable FRP sheet 1 and the jelly-like product 2, and can irradiate the photocurable FRP sheet 1 and the jelly-like product 2 evenly. . Therefore, the photo-curable FRP sheet 1 and the jelly-like product 2 can be immediately and completely cured and bonded to the concrete surface 10 to exhibit the effect of repair and reinforcement. Then, the coating film 3 on the surface side of the photocurable FRP sheet 1 is peeled off.

Note that the photocurable FRP sheet 1 adhered to the concrete surface 10 may generate a phenomenon that the shape of the resin itself returns with time, that is, a so-called spring effect. As a prevention method, pressure is applied to the photocurable FRP sheet 1 and ultraviolet light is applied at the same time to cure the photocurable FRP sheet 1, or ultraviolet light is applied immediately after pressure is applied to the light. When curing the curable FRP sheet 1 can be bonded to the photocurable FRP sheet 1 effectively and efficiently concrete surface 10 (the invention of claim 9 and 1 0, wherein).

In addition, when it takes time to apply the jelly-like material 2 and apply the photocurable FRP sheet 1 thereon to irradiate ultraviolet rays, or when the temperature of the construction place is high and the jelly-like material 2 softens and becomes liquid. Or when the applied jelly-like product 2 has a large coating thickness and is likely to fall off, or the repair-required portions 6 and 7 are applied, for example, as a ceiling portion, or the photo-curable FRP sheet 1 is applied. When the jelly-like product 2 falls or drops, it is important to prevent the photocurable resin jelly-like product 2 from dropping. As a method for this, a curable resin jelly-like material 2 is applied to the surfaces of the concrete structure 4 requiring repair 6 and 7 to level the unevenness of the concrete surface 10, and a coating film that transmits ultraviolet rays is applied thereon. The photo-curable resin jelly-like product 2 is irradiated with ultraviolet rays from above the coating film while preventing the sag of the photo-curable resin jelly-like product 2 from being applied. It is preferable to perform pre-curing to such an extent that dripping does not occur. Thereafter, the covering film is peeled off, the photocurable FRP sheet 1 is applied onto the jelly-like product 2 of the photocurable resin, and the photocurable FRP sheet 1 and the jelly-like product 2 are irradiated with ultraviolet rays to firmly When adhering to the concrete surface 10 is cured, jelly-like material 2 coated to the surface of the repair necessary portions 6,7 without sagging falling worry, effectively and efficiently can be repair and reinforcement (claim 1 wherein Invention).

FIG. 8 illustrates a cross-sectional view of the repaired and reinforced concrete structure 4. The adhesive strength of the photo-curable FRP sheet 1 and the jelly-like product 2 that are cured in response to ultraviolet rays and adhered to the concrete surface 10 is about ^2.5 N / mm ² . In addition, the repaired and reinforced concrete surface 10 has a natural appearance with an appearance that is almost the same as before repairing and reinforcing because the bonded photocurable FRP sheet 1 and jelly-like material 2 are thin and transparent.

Next, an embodiment of the repair and reinforcement method according to the invention described in claim 1 will be described. Incidentally, the repair of this embodiment, many of the reinforcing method, repairing was above mentioned, because in common with the basic concepts of the reinforcement method, the overlapping description of the common parts will be omitted.
In this embodiment, a photocurable resin jelly-like product 2 is applied to the surfaces of the concrete structure 4 requiring repair 6 and 7 to level the unevenness of the concrete surface 10, and a photocurable FRP sheet sheet is provided thereon. 1 is applied, and then the curable FRP sheet sheet 1 is softened into a plasticized state by pressing a trowel or the like heated to a plasticizing temperature (about 80 ° C. to 100 ° C.) from above the coating film 3. (not illustrated in the working method) of jelly-like material 2 Ru was adhered to the sheet 1 while pressing the uneven concrete surface 10 to the concrete surface 10 of photocurable resin by the addition of pressure. Then, the photocurable FRP sheet 1 and the photocurable resin jelly-like material 2 are cured by irradiating them with ultraviolet rays, and are bonded to the concrete surface 10 to be repaired and reinforced.
As a means for heating and softening the photocurable FRP sheet 1, in addition to the method using the heated trowel, for example, a dryer or a heater is used, or hot air at a temperature for plasticizing using other means is used. The heating means may be selected as long as the photocurable FRP sheet 1 can be softened to a plasticized state.
The photocurable FRP sheet 1 is heated to a plasticizing temperature before it is applied to the surfaces of the repair required portions 6 and 7 of the concrete structure 4 to which the photocurable resin jelly-like product 2 is applied. Then, after softening to a plasticized state, it may be performed by a procedure of applying to the concrete surface 10 to which the jelly-like product 2 is applied.
In this way, the photocurable FRP sheet 1 softened to a plasticized state can be more closely adhered to the details of the concrete surface 10 from above the jelly-like material, and the adhesive strength and peel strength can be increased.

Next, an embodiment of the repair and reinforcement method according to the invention described in claim 2 will be described. Incidentally, the repair of this embodiment, also the reinforcing method, repairing was above mentioned, since common many basic concept of the reinforcement method, the overlapping description of the common points is omitted.
In this embodiment, the curable resin jelly-like product 2 is applied to the surfaces of the concrete structure 4 where repair is required 6 , 7 to level the unevenness of the concrete surface 10, and the photocurable FRP sheet 1 is applied thereon. And the pressure roller 8 for applying pressure to the light curable FRP sheet 1 is vibrated by a vibrator to vibrate the light curable FRP sheet 1 so that the jelly-like product 2 of the light curable resin is applied to the concrete surface 10. The sheet 1 is brought into close contact with the concrete surface 10 while being pressed against the unevenness. (The illustration is omitted, and the invention of claim 8 ). Then, the photocurable FRP sheet 1 and the photocurable resin jelly-like material 2 are cured by irradiating them with ultraviolet rays, and are bonded to the concrete surface 10 to be repaired and reinforced.

At this time, when applying pressure to the photocurable FRP sheet 1 and applying vibration to the photocurable FRP sheet 1 or applying pressure to the photocurable FRP sheet 1 to bring the sheet 1 into close contact with the concrete surface 10, The sheet 1 can be more effectively adhered to the concrete surface 10 from above the jelly-like material (the invention according to claim 7 ).

Next, an embodiment of the repair and reinforcement method according to the invention described in claim 3 will be described. Incidentally, repairing, reinforcing method of the present embodiment, the repair of Example 1, 2 was above mentioned, since the contents of a combination of reinforcing method, overlapping description of common points will be omitted.
In the present embodiment, the photocurable resin jelly-like product 2 is applied to the surfaces of the concrete structures 4 requiring repair 6 and 7 to level the unevenness of the concrete surface 10, and the photocurable FRP sheet 1 is applied thereon. After being applied, the sheet is heated to a plasticizing temperature to soften it into a plasticized state, or before being applied, the photocurable FRP sheet 1 is heated to a plasticizing temperature to be softened into a plasticized state. After that , the sheet 1 is applied to the concrete surface 10 to which the jelly-like material 2 is applied , and the sheet 1 is pressed against the unevenness of the concrete surface 10 by applying pressure and vibration to the sheet 1 and pressing the photo-curable resin jelly-like material 2 against the unevenness of the concrete surface 10. Adhere to the concrete surface 10 . Then, the photocurable FRP sheet 1 and the photocurable resin jelly-like product 2 are irradiated with ultraviolet rays to be cured and adhered to the concrete surface 10 to be repaired and reinforced (not shown).

The Example shown in FIG. 9 shows the repair and reinforcement method with respect to the peeling location 11 of the photocurable FRP sheet 1 adhere | attached on the surface of the repair required location 6 and 7 of the concrete structure 3. FIG. That is, the photocuring FRP sheet 1 is provided with a hole from the outside of the peeled portion 11 by, for example, a drill, and is cured by being irradiated with a room temperature curable resin or ultraviolet rays using, for example, a pump or an injector 12. A jelly-like material 13 containing a liquid of a mold resin is injected to fill the voids tightly, and the jelly-like material 13 is cured at room temperature or by irradiation with ultraviolet rays. Thus, as shown in FIG. 10, the peeled portion 11 of the photocurable fiber reinforced resin sheet 1 can be adhered to the surface 10 of the concrete structure 4. That is, even if the already-cured photocurable FRP sheet 1 is peeled off from the concrete surface 10 due to poor adhesion or secular peeling, it can be easily and immediately bonded to the concrete surface 10 to be repaired and reinforced (claims). Item 11. The invention according to 1 ).

  In addition, although the Example of this invention was described above, it is not limited to such an Example of this invention at all, In the range which does not deviate from the summary of this invention, it can implement with a various form.

It is shape sectional drawing before use of a photocurable FRP sheet. It is sectional drawing of the concrete structure which has a repair required location. It is explanatory drawing which showed the step which apply | coats the jelly-like thing of photocurable resin to the surface of a repair required location. It is explanatory drawing which showed the Example which applied the reinforcing material to the surface of the repair required location, and apply | coated the jelly-like thing of the photocurable resin on it. It is explanatory drawing which showed the step which closely_contact | adheres a photocurable FRP sheet to the surface of a repair required location. It is explanatory drawing which showed the different Example which adheres a photocurable FRP sheet to the surface of a repair required location. It is explanatory drawing which showed the step which irradiates an ultraviolet-ray to a photocurable FRP sheet. It is sectional drawing of the concrete surface repaired and reinforced. It is explanatory drawing which showed the step which inject | pours a jelly-like thing into the peeling location of the jelly-like thing of a photocurable FRP sheet or a photocurable resin. It is sectional drawing of the concrete structure which repaired and reinforced the peeling location of the jelly-like thing of a photocurable FRP sheet or a photocurable resin.

Explanation of symbols

1 Photocurable fiber reinforced resin sheet (photocurable FRP sheet)
2 Photocurable resin jelly-like material 4 Concrete structure 5 Reinforcement material 6 Junker 7 Crack 8 Press roller 10 Concrete surface
13 Room temperature curable resin or light curable resin jelly

Claims (13)

A photocurable fiber reinforced resin sheet that cures and adheres when exposed to ultraviolet light is applied to the surface of the concrete surface of the concrete structure where repair is required, and pressure is applied to the light curable fiber reinforced resin sheet to the concrete surface. In the method of adhering and repairing by irradiating with ultraviolet rays,
To the surface of the repair required portion of the concrete structure by applying a jelly-like product of the photocurable resin leveling irregularities of a concrete surface, the same sheet plasticity after applying a photocurable fiber-reinforced resin sheet was Tsu thereon Heat to a plasticizing temperature by softening to a plasticizing state , or before applying, apply the jelly-like material after heating to a temperature to plasticize the photocurable fiber reinforced resin sheet and softening to a plasticizing state The sheet is applied to the concrete surface, the pressure is applied to the sheet to press the curable resin jelly-like material against the irregularities of the concrete surface, and the sheet is brought into close contact with the concrete surface. Repairing and reinforcing a concrete structure using a photo-curable fiber reinforced resin sheet, characterized in that the object is cured by irradiating with ultraviolet rays and cured and adhered to the concrete surface. And reinforcement method. A photocurable fiber reinforced resin sheet that cures and adheres when exposed to ultraviolet light is applied to the surface of the concrete surface of the concrete structure where repair is required, and pressure is applied to the light curable fiber reinforced resin sheet to the concrete surface. In the method of adhering and repairing by irradiating with ultraviolet rays,
Apply a photocurable resin jelly-like material to the surface of the concrete structure where repair is necessary, level the unevenness of the concrete surface, apply a photocurable fiber-reinforced resin sheet on it, and apply pressure and vibration to the sheet. The sheet is adhered to the concrete surface while pressing the photocurable resin jelly-like material against the unevenness of the concrete surface, and the sheet and the photocurable resin jelly-like material are cured by irradiating with ultraviolet rays to the concrete. A method for repairing / reinforcing a concrete structure using a photocurable fiber-reinforced resin sheet, wherein the surface is repaired and reinforced by bonding to a surface. A photocurable fiber reinforced resin sheet that cures and adheres when exposed to ultraviolet light is applied to the surface of the concrete surface of the concrete structure where repair is required, and pressure is applied to the light curable fiber reinforced resin sheet to the concrete surface. In the method of adhering and repairing by irradiating with ultraviolet rays,
To the surface of the repair required portion of the concrete structure by applying a jelly-like product of the photocurable resin leveling irregularities of a concrete surface, the same sheet plasticity after applying a photocurable fiber-reinforced resin sheet was Tsu thereon Heat to a plasticizing temperature by softening to a plasticizing state , or before applying, apply the jelly-like material after heating to a temperature to plasticize the photocurable fiber reinforced resin sheet and softening to a plasticizing state the Ategai the concrete surface, the jelly-like product of the photocurable resin by applying pressure and vibration to the sheet is adhered to the sheet while pressing the irregularities of a concrete surface to the concrete surface, the sheet and the photocurable resin Concrete structure using a photo-curable fiber reinforced resin sheet, which is cured and cured by irradiating ultraviolet rays onto the jelly-like material and bonding it to the concrete surface. The method of repair and reinforcement. Apply a reinforcing material such as a wire mesh to the repaired part of the concrete structure, apply a photo-curable resin jelly on the reinforcing material, and apply a photo-curable fiber reinforced resin sheet on it. Or, apply the reinforcing material to the repaired part of the concrete structure, apply the photo-curable resin jelly on the reinforcing material, apply the reinforcing material again on the jelly-like material, and Apply a photo-curable fiber reinforced resin sheet to the surface or apply a photo-curable resin jelly-like material on the concrete structure where repair is required, apply a reinforcing material on it, and then apply the photo-curable fiber reinforced resin on it. A resin sheet is applied, and the photocurable fiber reinforced resin sheet and the photocurable resin jelly-like product are irradiated with ultraviolet rays to be cured and bonded to the concrete surface to be repaired and reinforced. Repair and reinforcement method of the photocurable fiber-reinforced resin sheet concrete structure with as claimed in any one of claim 1-3. The photo-curable fiber reinforced resin sheet has one end applied to the concrete surface, and pressure is applied to the other end in sequence, pressing the jelly-form photo-setting resin previously applied to the concrete surface. A method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 1 to 4 , wherein the concrete structure is in close contact. Photocurable fiber-reinforced resin sheet is characterized by adding the size pressure required by pressing with a pressing roller, according to claim 1 or 4 or 5 concrete structure that uses photocurable fiber-reinforced resin sheet according to Repair and reinforcement methods. Apply pressure and vibration simultaneously to the photocurable fiber reinforced resin sheet, or apply pressure to the photocurable fiber reinforced resin sheet and then apply vibration to adhere the jelly-like material of the sheet and the photocurable resin to the concrete surface. A method for repairing / reinforcing a concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 2 to 5 , wherein: The photocurable fiber-reinforced resin sheet is a photocurable resin according to claim 2 or 3 or 4 or 5 or 7 characterized in that a vibration is applied to the photocurable fiber-reinforced resin sheet by vibrating a pressing roller with a vibrator. For repairing and reinforcing concrete structures using plastic fiber reinforced resin sheets. To the surface of the concrete structure where repair is necessary, light-curing fiber reinforced resin sheet or photo-curing resin jelly-like material is brought into close contact by applying pressure or vibration, and simultaneously irradiating with ultraviolet rays, The concrete structure using the photocurable fiber reinforced resin sheet according to any one of claims 1 to 8 , wherein the photocurable fiber resin sheet and a jelly-like product of the photocurable resin are cured. Repair and reinforcement methods. Immediately irradiate ultraviolet rays immediately after applying pressure or vibration and applying pressure or vibration to the surface of the concrete structure where the repair is required. The photocurable fiber resin sheet and the photocurable resin jelly-like product are cured, and concrete using the photocurable fiber reinforced resin sheet according to any one of claims 1 to 8 , How to repair / reinforce structures. Photocurable resin that cures when irradiated from the outside of the photocurable fiber reinforced resin sheet with room temperature curable resin or ultraviolet rays from the outside of the photocurable fiber reinforced resin sheet adhered to the surface of the concrete structure requiring repair fill the gap by injection of a jelly-like material that includes a liquid closely real, the jelly-like material at normal temperature or UV cured by irradiation with, characterized in that adhering to the surface of the concrete structure, according to claim repair and reinforcement method for a concrete structure with a 1 to 1 0 photocurable fiber-reinforced resin sheet according to any one of. Applying a photo-curable resin jelly to the surface of the concrete structure where repair is necessary, leveling the unevenness of the concrete surface, and pasting a coating film that transmits ultraviolet light on it, the photo-curable resin jelly The coating film is cured by irradiating the photocurable resin jelly-like product with ultraviolet rays from above the coating film while preventing the product from sagging, and curing the photocurable resin jelly-like product to the extent that it does not fall off. After peeling off, the photocurable fiber reinforced resin sheet is placed on the photocurable resin jelly-like material, and the photocurable fiber-reinforced resin sheet and the photocurable resin jelly-like material are irradiated with ultraviolet rays. repaired adhered to-cured concrete surface, characterized in that the reinforcement, repair and reinforcement side of the concrete structure using the photocurable fiber-reinforced resin sheet according to any one of claims 1 to 1 0 Law. Irradiation of ultraviolet rays is performed by applying an ultraviolet ray source with an ultraviolet intensity and a moving speed that satisfy the accumulated amount of ultraviolet rays necessary for sufficiently curing the photocurable fiber reinforced resin sheet and the photocurable resin jelly-like material to ensure adhesive strength. and irradiating while moved, repair and reinforcement method of the concrete structure using a photocurable fiber-reinforced resin sheet according to any one of claims 1 to 1 2.

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