KR102173974B1 - Method of repairing and reinforcing using impregnated glass fiber sheet and manufacturing device - Google Patents

Abstract

The present invention relates to a repair and reinforcement method using an impregnated fiberglass sheet for concrete and steel structures and a manufacturing device. More specifically, when producing materials for repair and reinforcement by impregnating a glass fiber sheet, shrinkage in thermosetting resins and room temperature hardening resins provided as impregnating agents for the glass fiber sheet is adjusted, so that a low shrinkage-type impregnated glass fiber sheet for stable repair and reinforcement work is produced, and a method for repairing and reinforcing concrete and steel structures is provided by using the same. According to the present invention, when producing materials for repair and reinforcement by impregnating a glass fiber sheet, shrinkage of thermosetting resins and room temperature hardening resins provided as impregnants is adjusted, and thus stable repair and reinforcement construction can be performed. Even if a separate impregnating agent receiving part is not provided, an impregnating agent (impregnating resin composition) can be received in a space part of an impregnating device. Thus, the size of the impregnating device can be reduced, and sufficient impregnation can be performed with just one-time rolling. The physical properties of the glass fiber sheet are excellent, and thus the life after repair can be extended with respect to repair and reinforcement construction of concrete structures and steel structures using the properties. Also, the repair effect can be enhanced.

Description

Repair and reinforcement method using impregnated glass fiber sheet and manufacturing device for concrete and steel structures {Method of repairing and reinforcing using impregnated glass fiber sheet and manufacturing device}

The present invention relates to a repair and reinforcement method using an impregnated fiberglass sheet for concrete and steel structures and a manufacturing device, and more particularly, a fiberglass sheet for structurally repairing and reinforcing concrete structures and steel structures such as beams, slabs, and columns. The present invention relates to a glass fiber sheet manufactured by impregnating an impregnating agent (reinforcing agent) such as an epoxy resin, and a structure repair and reinforcement technology using the manufacturing apparatus.

In general, the reinforcing fiber sheet required for repair and reinforcement in the fields of architecture, civil engineering, shipbuilding, aviation, etc. refers to a fiber sheet in which a fiber material is mixed in a synthetic resin to improve mechanical strength. In general, a composite material of glass fiber, carbon fiber, and aramid fiber is manufactured and sold in the form of a sheet or a panel.

Among these reinforcing fiber sheets, a reinforcing plate made of glass fiber is economical, strong against impact, and has a very high tensile strength, and a reinforcing plate made of carbon fiber has high tensile strength and tensile elasticity, and is made of aramid fiber. In the case, the tensile strength and tensile elasticity are lower than that of glass fiber and carbon fiber, but the impact strength is high, the wear resistance is strong, the resistance to breaking is high, and the vibration damping effect is greater than that of carbon fiber.

The above-described fiber sheets are molded using a one-way prepreg or pultruded using carbon filaments. In the case of conventional one-way prepreg or pultrusion molding, it has a strong force in the fiber length direction, but has a relatively weak force because it is only bonded by resin bonding in a perpendicular direction. Accordingly, reinforcing materials having excellent tensile strength not only in the fiber length direction but also in the perpendicular direction are manufactured by woven fibers into a fabric form and impregnated with synthetic resin.

Conventionally, in the process of attaching a fiber sheet to a concrete structure, an impregnant is applied to the fiber sheet and then attached to the concrete structure, and then the fiber sheet is pressurized with a roller to discharge air inside the fiber sheet to improve adhesion and increase support. Will improve. However, there is a cumbersome problem in that the worker must adhere to the concrete structure after applying the impregnant to the fiber sheet one by one in the field, and thus, the problem of delaying the work process always exists.

Recently, in order to solve this problem, as in Korean Patent Application No. 10-2010-0059003, the fiber sheet was previously impregnated in a tank filled with an impregnant, and the internal air of the fiber sheet was removed by pressure and then attached to the concrete structure. Technology has been developed and used. However, in the recent fiber sheet impregnation technology, the impregnant is circulated through the storage chamber and the circulation line and supplied to the tank. In this process, the impregnant made of epoxy and the curing agent hardens and gradually accumulates on the inner walls of the storage chamber and the circulation line. There is a problem in that maintenance is required, and there is a problem in that the replacement cycle of the storage chamber and circulation line is accelerated due to corrosion caused by hardening, thereby increasing the production cost.

The above-described invention refers to the background technology in the technical field to which the present invention belongs, and does not mean the prior art.

The present invention was conceived to solve the above-described conventional problems, and an object of the present invention is to impregnate a glass fiber sheet to form a repair and reinforcement material, a thermosetting resin and a room temperature curable resin provided as an impregnating agent for a glass fiber sheet It is to provide a method of manufacturing a low-shrink-type impregnated fiberglass sheet for stable repair and reinforcement work by controlling the shrinkage and repairing and reinforcing concrete structures and steel structures using the same.

In order to achieve the above object, one embodiment of the present invention

As a low-shrink type glass fiber sheet formed by impregnating a glass fiber sheet with an impregnating resin composition formed by mixing 100 parts by weight of an impregnating resin, 50 to 300 parts by weight of a shrinkage reducing agent, and 8 to 12 parts of a hardener,

The impregnating resin is characterized in that it is a thermosetting resin or room temperature curable resin,

The shrinkage reducing agent is a granular polystyrene resin dissolved in a styrene monomer as a catalyst, and 30 to 40 parts by weight of a polystyrene resin is mixed and dissolved in 60 to 70 parts by weight of a styrene monomer to provide a low shrinkage glass fiber sheet. do.

In an embodiment of the present invention, the impregnating resin composition further comprises a functional filler comprising a mixture of silica powder and expandable graphite.

In addition, in an embodiment of the present invention, the room temperature-curable resin is characterized in that it is made of an epoxy resin, a first liquid containing a urethane resin, and a second liquid containing an acrylic resin.

Another embodiment of the present invention in order to achieve the above object

A first step of arranging the background surface;

A second step of drilling an anchor hole for installing a fiber anchor;

A third step of applying an adhesive resin on the upper surface of the base surface; And

A fourth step of attaching the low-shrink glass fiber sheet according to the present invention to a base surface coated with an adhesive resin using a fiber anchor; It provides a repair and reinforcement method of concrete and steel structures comprising a.

In one embodiment of the present invention, the fourth step,

It is characterized in that the glass fiber sheet is fastened to the base surface through an adhesive resin by attaching the glass fiber sheet to the target base surface and compressing it evenly, and fastening the fiber anchor to the top of the glass fiber sheet.

In addition, the present invention, after the fourth step,

Perform the construction completion work, but if the glass fiber sheet is installed in an area where acid resistance is required on the outside of the glass fiber sheet, an acid-resistant paint is applied, and in the case where acid resistance is not required, a surface protection coating is applied. A fifth step of performing application and peripheral cleaning; It may further include.

Another embodiment of the present invention in order to achieve the above object

A first step of arranging the background surface;

A second step of applying an adhesive resin on the upper surface of the base surface; And

A third step of attaching the low-shrink glass fiber sheet according to the present invention using a fiber anchor inserted into a fiber anchor hole to a base surface coated with an adhesive resin; It provides a concrete structure and a repair and reinforcement method of a steel structure comprising a.

According to the present invention, in forming a material for repair and reinforcement by impregnating a glass fiber sheet, stable repair and reinforcement work can be performed by controlling shrinkage in the thermosetting resin and room temperature curable resin provided as the glass fiber sheet.

In addition, according to the present invention, the impregnating agent (impregnating resin composition) can be accommodated in the space part of the impregnating device even without a separate impregnating agent receiving part, so that the size of the impregnating device can be reduced, and sufficient impregnation with only one rolling There is an advantage to be able to do it.

In addition, according to the present invention, since the physical properties of the glass fiber sheet are excellent, there is an advantage of increasing the repair effect, such as extending the repair life in the repair and reinforcement construction of concrete and steel structures using the same.

1 is a perspective view showing a fiber impregnation device used in an embodiment of the present invention.
2 is a side cross-sectional view showing a fiber impregnation device according to an embodiment of the present invention.
3 is a side view showing a fiber impregnation device according to an embodiment of the present invention.
Figure 4 is a front cross-sectional view showing a fiber impregnation device according to an embodiment of the present invention.
5 is a front view showing a fiber impregnation device according to an embodiment of the present invention.
6 is a cross-sectional view showing a state of use of the fiber impregnation device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the fiber sheet impregnation technology according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, the following examples are not intended to limit the scope of the present invention, but are presented merely as examples, and there may be various embodiments implemented through the present technical idea.

First, a description will be given of forming an impregnated glass fiber sheet by immersing a resin for impregnation in the glass fiber according to the present invention.

The glass fiber sheet according to the present invention is characterized in that it is formed by impregnating a glass fiber sheet with an impregnated resin composition formed by mixing 100 parts by weight of an impregnation resin, 50 to 300 parts by weight of a shrinkage reducing agent, and 8 to 12 parts of a hardener,

The impregnating resin is characterized in that it is a thermosetting resin or room temperature curable resin,

The shrinkage reducing agent is a granular polystyrene resin dissolved in a styrene monomer as a catalyst, and is characterized in that 30 to 40 parts by weight of a polystyrene resin is mixed and dissolved in 60 to 70 parts by weight of a styrene monomer.

In the present invention, the curing shrinkage of the "thermosetting resin" such as an unsaturated polyester resin and an acrylic and urethane-based "room temperature curing resin" reaches a certain state quickly with an increase in the amount of the curing accelerator and catalyst, and the value is 3.5/1000 To 5.5/1000.

In order to compensate for this, it is important to reduce the amount of resin added as much as possible.However, due to the nature of products that need to be impregnated with resin, reducing the amount of resin may lead to quality deterioration, and there is a concern about uncuring, which is not an appropriate solution. .

Accordingly, in order to reduce fundamental shrinkage and manufacture a high-quality glass fiber sheet, the present invention is characterized by using a "shrinkage reducing agent" for the impregnated resin.

The "shrinkage reducing agent" used in the present invention fills a part where shrinkage occurs when the impregnated resin is crosslinked, thereby preserving as much as the shrinkage part of the resin, so that uniform performance can always be expected.

That is, by mixing a shrinkage reducing agent into the impregnated resin, it is possible to reduce the shrinkage rate of the glass fiber sheet and provide a stable impregnated fiber sheet.

However, if the shrinkage reducing agent is used more than necessary, the physical properties of the impregnated fiber sheet may be deteriorated, so it is desirable to appropriately determine the amount of the shrinkage reducing agent.

It is preferable to use the shrinkage reducing agent to be used in the present invention in which granular "polystyrene" is dissolved in "styrene monomer" as an impregnating resin catalyst.

In the shrinkage reducing agent intended to be used in the content of this patent (low shrinkage impregnated fiber sheet), the weight ratio of polystyrene (preferably, weight average molecular weight 10,000 to 200,000) and styrene monomer is 30 to 40 parts by weight of polystyrene resin, 60 to 70 parts by weight of styrene monomer. It is preferable to mix and dissolve in parts by weight.

In the present invention, when 100 parts by weight of an impregnating resin, 50 to 300 parts by weight of a shrinkage reducing agent, and 8 to 12 parts of a curing agent are mixed and used, the curing shrinkage rate (less than 3.5/1000) and workability are required compared to when the shrinkage reducing agent is not used. It can be seen that all of the time is satisfied, and it can be used stably in the field.

In the present invention, it is preferable to use an amine-based curing agent as the curing agent, but is not limited thereto.

In the present invention, the impregnated resin may be varied depending on the range of repair and curing method.

In addition, in the present invention, the impregnating resin composition may further include a functional filler.

As the functional filler, a mixture of silica powder and expandable graphite may be used.

As the silica powder, one or a mixture of two or more selected from colloidal silica, fumed silica, and micronized silica may be used.

The functional filler serves to increase the repair effect by further increasing the binding effect. In the present invention, the mixing ratio of the silica powder and the expandable graphite is preferably mixed in a weight ratio of 100:50 to 200.

In addition, when using the functional filler, it is possible to use the powder directly, but by treating the surface and coating it with an organosilane, it is possible to increase the durability due to increased binding effect.

That is, the silica powder alone or a mixture of expandable graphite powder may be treated by dispersing a colloidal solution in which a solvent is dispersed in an organic silane, followed by stirring for about 1 to 10 hours. Specifically, about 0.1 to 50 parts by weight of an organic silane is added to the solution based on 100 parts by weight of a silica powder alone or a mixture solution of expandable graphite powder to form an organic group on the surface of the powder particles in the solution and pass through the reactor to dehydration and condensation reaction. Through the organic group surface-treated powder is formed. In this case, the solution is that silica powder or expandable graphite powder is dispersed in a colloidal state in a solvent such as water or alcohol, and it is preferable to contact the organic silane in a colloidal solution state.

Specific examples of the organosilane include dimethyldimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, and tetraethoxysilane. At this time, treating the surface of the powder with organic silane is formed by stirring at room temperature for about 1 to 10 hours to form an inorganic substance having an organic group and passing it through a reactor. In this case, the reactor is a heating device, and the temperature is raised to 100 to 300°C to dehydrate and condensate the inorganic material having a solvent and an organic group formed thereon for 1 to 10 hours to prepare powdery inorganic particles having a surface treatment.

The silica powder and the expandable graphite powder prepared as described above have excellent binding effects because silane is formed on the surface thereof, and thus durability may be further improved.

In the present invention, the functional filler is preferably included in the range of 1 to 10 parts by weight based on 100 parts by weight of the impregnating resin composition.

Next, an example of an apparatus for manufacturing an impregnated fiber sheet according to the present invention will be described.

The impregnation device used in the present invention may be an impregnation device proposed by the inventors through a prior application registration patent (Korean Patent No. 10-1655974), and in addition, an improved impregnation device may be used.

Hereinafter, such an impregnation device will be described in detail.

1 is a perspective view showing a fiber impregnation device used in an embodiment of the present invention, Figure 2 is a side cross-sectional view showing a fiber impregnation device according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is a side view showing a fiber impregnation device according to an example, Figure 4 is a front cross-sectional view showing a fiber impregnation device according to an embodiment of the present invention, Figure 5 is a fiber impregnation device according to an embodiment of the present invention. It is a front view, and Figure 6 is a cross-sectional view showing a state of use of the fiber impregnation device according to an embodiment of the present invention.

As shown in the drawing, the fiber sheet impregnation device (SD) for impregnating the fiber sheet of the present invention with the impregnating agent is provided with a pair of main rollers 10 as shown in Figure 1, impregnated therebetween The space part 20 in which me is accommodated is provided integrally.

Specifically, as shown in FIG. 2, the pair of main rollers 10 are arranged side by side at the same height, and a space 20 in which an impregnating agent is accommodated is provided therebetween. At this time, the pair of main rollers 10 are spaced apart by a predetermined interval, so that a slit S is formed under the space part 20.

Meanwhile, the injected fiber sheet is guided to the slit (S) by a pair of main rollers 10 rotating in opposite directions to each other. Therefore, the impregnating agent accommodated in the space part 20 is wetted in the fiber sheet, and the rolling process through the pair of main rollers 10 is centered on the slit (S), and a sufficient impregnation effect is achieved with only one rolling process. Can be obtained.

In addition, since the impregnating agent for a concrete structure (SD) of the present invention is accommodated in the space part 20, it is not necessary to form a separate impregnating agent accommodating part, and thus the size of the impregnating device can be reduced. There is an additional advantage of being easy to transport or store.

Meanwhile, as the impregnating agent, an epoxy resin is used as described above, and the epoxy resin has a sharp increase in viscosity at a temperature of 5° C. or lower, so that impregnation efficiency may decrease. Therefore, due to the nature of the impregnation device provided at the repair and reinforcement site and exposed to the outside air, it has no choice but to react sensitively to the temperature, and the impregnation efficiency is inevitably lowered in a low temperature environment in winter.

Accordingly, the present invention is provided with heating elements 11 inside the main roller 10, respectively, as shown in FIG. 5 to increase the temperature of the main roller 10, so that the temperature of the epoxy resin is kept constant even in winter. This excessive increase can be prevented.

In addition, when the temperature rises above a certain level, the viscosity is excessively reduced, and it is important to keep the heating element 11 at a temperature within a certain range.

Accordingly, the impregnating device SD for a concrete structure may include a control unit 30, and the main roller 10 may include a temperature sensor 12.

That is, the control unit 30 may check the real-time temperature of the main roller 10 based on the information of the temperature sensor 12, and control the operation of the heating element 11 based on the checked temperature. .

Accordingly, the control unit 30 of the impregnation device SD controls the operation of the heating element 11 according to the temperature range set in advance by the operator, so that the surface of the main roller 10 can maintain a constant temperature.

On the other hand, the fiber sheet of the present invention may include fiber sheets such as glass, graphite, polyaramid, boron, Kevlar, silica, quartz, ceramic, polyethylene, aramid, and basalt, more preferably a glass fiber sheet.

Typically, the fiber sheet may be formed to a thickness of around 1 mm, and in order to effectively impregnate through the rolling process and prevent leakage of the impregnant through the slit (S), a slit (S) that is about 0.2 to 0.3 mm thinner than the fiber sheet. It is preferable to form.

Therefore, the thickness of the fiber sheet may vary depending on the type of fiber sheet, so that a variety of fiber sheets can be applied to the work regardless of the type of fiber sheet, so that the slit control rod 13 is moved forward and backward. It is coupled to be moved so that the spacing of the slits S formed between the pair of main rollers 10 can be adjusted.

Specifically, the slit adjustment rod 13 may be operated by a screw tightening method or a hydraulic method, and by adjusting the position of one main roller 10 coupled to the end of the slit adjustment rod 13, the slit (S ) Can be adjusted.

Meanwhile, at least one guide roller 40 on which a fiber sheet is mounted is provided at the rear of the main roller 10, and the fiber sheet passing through the slit S is discharged in front of the main roller 10. A roller 50 may be provided.

The guide roller 40 may be provided with at least one, and the fiber sheet is directly wound on the guide roller 40 to be automatically released according to the rotation of the main roller 10, or a plurality of guide rollers 40 By mounting them side by side, and allowing the fiber sheet spread on the top to be mounted, it can be formed to guide the movement naturally.

At this time, the guide roller 40 is preferably located at the rear of the main roller 10, but the position is not limited to the rear, but it is possible to guide the fiber sheet more effectively if it is located at the rear upper part.

In addition, the discharge roller 50 for discharging the impregnated fiber sheet from the front of the main roller 10 guides the fiber sheet to be easily collected by the operator, and at this time, the discharge roller 50 is a main roller It is preferable to be located in front of (10), but the position is not limited to the front, but it is possible to collect the fiber sheet more effectively if it is located in the lower front.

In addition, the fiber sheet impregnated in the discharge roller 50 may be configured to be continuously wound.

Meanwhile, a pair of side panels 60 blocking the side surfaces of the space 20 may be provided on the main roller 10. It is preferable that the side panel 60 is manufactured to correspond to the cross-sectional shape of the space 20 to prevent the impregnating agent from leaking to the side.

As shown in FIG. 4, the position of the side panel 60 can be adjusted along the guide rod 61 mounted on the top, and when the position of the side panel 60 is specified, the locking means 62 The side panel 60 can be fixed to the guide rod 61.

In this case, the side panel 60 may be manufactured such that a connection rod is formed on the upper portion, and the connection rod moves along the guide rod 61 in the longitudinal direction thereof.

The pair of side panels are provided to effectively accommodate the impregnating agent accommodated in the space, and further, by adjusting the spacing of the side panels according to the width of the fiber sheet, it is possible to guide the movement of the fiber sheet, Only the impregnating agent of the bar can be accommodated in the space portion 20, there is an advantage that the impregnating agent can be used economically.

On the other hand, as shown in Figure 3, the pair of main rollers 10 is formed to engage a gear unit 14 at one end of each, and a driving means connected to the rotation shaft 15 of the one side of the main roller 10 70 can rotate the pair of main rollers (10).

Therefore, the power applied by the driving means 70 rotates the one main roller 10 via the rotation shaft 15, and the gear part 14 formed on the one main roller 10 is applied to the other main roller 10. While meshing with the formed gear portion 14, the pair of main rollers 10 rotate in opposite directions to each other.

The fiber sheet inserted in the slits (S) between the main rollers 10 is impregnated while continuously moving forward through the slits (S) according to the rotation of the main rollers 10.

In this case, the driving means 70 may be a handle 75 powered by a manpower, or an automatic driving means using the power of the motor unit 71.

In the case of automatically implementing the impregnation device (SD) of the present invention, the driving means 70 transmits the power produced by the motor unit 71 via the power transmission means 72 as a medium of the rotation shaft of the main roller 10 ( 15) can be delivered.

The power transmission means 72 may use a known transmission, gear and chain, and the transmitted power is transmitted to the rotation shaft 15 of the main roller 10 to implement rotation.

At this time, the control unit 30 can appropriately control the speed of the driving means 70, and in order to increase the work efficiency of the operator, power is continuously transmitted from the power transmission means 72 to the rotating shaft 15 or It is possible to form an operation portion 73 that can be blocked.

In the case of automatically implementing the impregnation device (SD), the operation unit 73 transmits or blocks power when a problem occurs between jobs or when a fiber sheet needs to be replaced, so that it can flexibly cope with unexpected situations between jobs. have.

However, during normal operations, the operator must use his or her hand to check or transfer the fiber sheet injected into the impregnating device (SD) or the impregnated fiber sheet discharged, so it is preferable to manufacture it in the form of a scaffold.

On the other hand, the impregnation device (SD) for a concrete structure of the present invention is provided with a switching lever 74, it is possible to selectively change the manual mode and the automatic mode. Accordingly, when there is a power source according to the situation of the work site, it is desirable to implement it in an automatic mode, but in a situation where conditions are poor, the work can be performed in a manual mode.

In addition, due to the nature of the impregnation device used in the field, there is a problem that the excess impregnant generated in the working process falls to the floor and pollutes the surrounding environment, and material is wasted due to the use of an excessive amount of impregnating agent. The inclined panel 80 is provided in the lower part of 10) so that the excess impregnant can be guided to one side. As a result, the guided impregnant can be easily collected and the collected impregnant can be reused.

On the other hand, the fiber sheet impregnation method for impregnating the fiber sheet according to the present invention in the impregnating agent may be configured including a preparation step, an impregnation step, a slit induction step, and a discharge step.

Specifically, the preparation step is a step of preparing a work by mounting a fiber sheet on at least one guide roller 40. At this time, one end of the fiber sheet is provided in a slit (S) formed between a pair of main rollers 10 in advance.

Thereafter, the main roller 10 is automatically or manually driven to move the fiber sheet to the slit (S), whereby continuous impregnation of the fiber sheet is possible. Substantially, the impregnation step and the slit guiding step may be performed at the same time depending on the position of the fiber sheet, and when looking at the same position of the fiber sheet, the slit guiding step is followed after the impregnation step.

The impregnation step is a step in which the impregnating agent accommodated in the space 20 is wetted into the fiber sheet while passing through the space 20 between the pair of main rollers 10 arranged side by side.

The impregnation step is defined to mean a state in which a portion of the fiber sheet is simply positioned in the space 20 before reaching the slit (S).

On the other hand, the slit induction step performed after the impregnation step is a step in which the impregnated fiber sheet is guided to the slits S formed therebetween by a pair of main rollers 10 rotating in opposite directions.

However, since the impregnating agent is in contact with the fiber sheet even in the slit induction step, the impregnation and the rolling process by the main roller are substantially simultaneously performed.

In addition, the discharging step performed after the slit induction step is a step in which the impregnated fiber sheet is discharged through the slit (S), and can be easily collected by the discharging roller 50.

Next, an example of a method of repairing and reinforcing concrete and steel structures using the manufactured fiberglass sheet will be described.

First, arrange the background surface. In other words, it is desirable that the base surface should be sufficiently cured and dried, and measures should be taken so that there are no foreign substances or other obstacles to attachment to the surface. If surface chipping is necessary, remove the damaged part and remove foreign substances on the surface.

Thereafter, if fiber anchor installation is necessary, an anchor hole is drilled.

That is, it is desirable to use an electric drill to perforate the anchor hole while maintaining it vertically, and to completely remove internal dust and foreign matter from the perforation. Thereafter, an adhesive resin is applied.

It is preferable to sufficiently mix and mix the main material and the curing agent in a prescribed formulation, and evenly apply the resin to the base surface to be adhered to the impregnated fiber sheet with a thickness of 2 to 5 mm so that the smoothness is maintained.

Thereafter, the glass fiber sheet is attached to the base surface to which the adhesive resin is applied.

That is, the glass fiber sheet is attached to the target base surface and compressed evenly, removing air bubbles, and curing. On the other hand, if the attachment length is insufficient by using a fiber anchor if necessary, it can be secured and used to increase adhesion, and a part of the fiber anchor is inserted and filled with epoxy filling, and the rest is spread radially and covered with an impregnated fiberglass sheet. You can close it.

Thereafter, curing and applying a sealing agent to the fiber-finished area are performed.

At this time, after curing, an acid-resistant paint or a protective coating may be applied to the surface of the glass fiber sheet.

After that, the construction completion work is performed. That is, when a glass fiber sheet is installed in an area requiring acid resistance, it is preferable to apply an acid-resistant paint, and when an area where acid resistance is not required, apply a surface protection coating agent, etc.

In the above, a repair and reinforcement method using an impregnated fiberglass sheet for concrete and steel structures and a manufacturing apparatus according to an embodiment of the present invention has been described in detail with reference to the drawings.

One embodiment of the present invention described above is merely exemplary, and those of ordinary skill in the technical field to which the present invention belongs will appreciate that various modifications and other equivalent embodiments are possible. . Therefore, it will be appreciated that the present invention is not limited to the form mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, the present invention is to be understood as including the spirit of the present invention as defined by the appended claims and all modifications, equivalents and substitutes within the scope thereof.

SD: impregnation device 10: main roller
11: heating element 12: temperature sensor
13: slit adjustment rod 14: gear unit
15: rotation shaft 20: space
30: control unit 40: guide roller
50: eject roller 60: side panel
61: guide rod 62: locking means
70: drive means 71: motor unit
72: power transmission means 73: operating part
74: shift lever 75: handle
80: inclined panel S: slit

Claims (7)

As a low-shrink type glass fiber sheet formed by impregnating a glass fiber sheet with an impregnating resin composition formed by mixing 100 parts by weight of an impregnating resin, 50 to 300 parts by weight of a shrinkage reducing agent, and 8 to 12 parts by weight of a hardener,
The impregnating resin is characterized in that it is a thermosetting resin or room temperature curable resin,
The shrinkage reducing agent is a granular polystyrene resin dissolved in a styrene monomer as a catalyst, and is characterized in that 30 to 40 parts by weight of a polystyrene resin is mixed and dissolved in 60 to 70 parts by weight of a styrene monomer,
It characterized in that it further comprises a functional filler made of a mixture of silica powder and expandable graphite to the impregnating resin composition,
The functional filler is characterized in that the mixing ratio of silica powder and expandable graphite is 100:50 to 200 weight ratio, and the surface is coated with organosilane,
An organic group is formed on the surface of the powder particles in the solution by adding 0.1 to 50 parts by weight of an organic silane based on 100 parts by weight of the mixture solution of the silica powder and the expandable graphite powder, and the surface is treated with the organic group through dehydration and condensation reaction. , The solution is characterized in that using silica powder or expandable graphite powder dispersed in water or alcohol in a colloidal state,
The organic silane is characterized in that it is selected from dimethyldimethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, and tetraethoxysilane,
The functional filler made of a mixture of silica powder and expandable graphite is contained in a range of 1 to 10 parts by weight based on 100 parts by weight of the impregnating resin composition.
delete The low-shrink glass fiber sheet according to claim 1, wherein the room temperature curable resin is made of a first liquid containing an epoxy resin, a urethane resin, and a second liquid containing an acrylic resin.
A first step of arranging the background surface;
A second step of drilling an anchor hole for installing a fiber anchor;
A third step of applying an adhesive resin on the upper surface of the base surface; And
A fourth step of attaching the low-shrink glass fiber sheet according to claim 1 to a base surface coated with an adhesive resin using a fiber anchor; Including,
The fourth step is characterized in that the glass fiber sheet is fastened to the base surface through an adhesive resin in a manner of fastening the fiber anchor to the top of the glass fiber sheet while attaching the glass fiber sheet to the target base surface and compressing it evenly. ,
After the fourth step, the construction completion work is performed, but when the glass fiber sheet is installed in an area where acid resistance is required outside of the glass fiber sheet, an acid-resistant paint is applied, and when the acid resistance is not required, a surface protective coating is applied. A fifth step of applying a paint suitable for performance in a manner and performing peripheral arrangement; Repair and reinforcement method of concrete and steel structures, characterized in that it further comprises.
delete delete A first step of arranging the background surface;
A second step of applying an adhesive resin on the upper surface of the base surface; And
A third step of attaching the low-shrink glass fiber sheet according to claim 1 to a base surface coated with an adhesive resin using a fiber anchor inserted into a fiber anchor hole; Concrete structure and the repair and reinforcement method of the steel structure comprising a.

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