KR200277971Y1 - Fiber Reinforced Composite Skin for Euroform Plywood - Google Patents

Abstract

The present invention relates to a fiber-reinforced composite coating formed on the plywood surface of euroforms, which is widely used as formwork when constructing civil and concrete concrete structures. In this invention, fiber reinforced composites are used instead of replacing damaged coated plywood of euroforms. Apply water-lamination method to repair damaged coated plywood simply to repair Euroform, or when replacing or forming new plywood of Euroform, treat the surface of plywood to strengthen the surface to reduce the damage of the surface of plywood. There is provided a film of Eurofoam plywood using fiber-reinforced composite material that can prevent the absorption of moisture into the plywood to improve the quality of the concrete surface.

If the formwork made of coated plywood is damaged while using Euroform in the field, the cast concrete surface becomes rough, so in order to use Euroform again, the mold should be used as it is and the coated plywood should be replaced. If the material film is used, the Eurofoam can be used more economically because the composite film made of reinforcing fibers and resin is applied to the surface of the damaged coated plywood without replacing the coated plywood.

The concrete surface constructed with the coated plywood recycled with the composite film of the present invention has a much cleaner surface than the coated plywood with the rough surface using several times, and the coated plywood used for the first time when constructed with the composite film of the present invention The quality of concrete faces is better than that of steel or steel formwork.

In addition, if the fiber-reinforced composite film of the present invention is used, the high-strength fiber-reinforced composite material protects the surface of the formwork, so that damage to the formwork surface can be minimized during use because it is not easily damaged by external impact. You can increase the number of times.

When the composite coating of the present invention is used, the fiber reinforced composite coating used for repair is lightweight, so there is almost no increase in weight and no increase in thickness after repairing. Even if the damaged Eurofoam is damaged on the surface of the composite coating during use, it can be easily repaired and reused only, thereby greatly reducing the amount of plywood used and reducing the throughput of the waste plywood.

In addition, the present invention reduces the damage to the surface of the plywood by strengthening the surface by applying a composite film instead of coating the plywood even when replacing the plywood of the completely damaged eurofoam or manufacturing a new euroform. This can be prevented from being absorbed to improve the quality of the concrete surface.

Description

Fiber Reinforced Composite Skin for Euroform Plywood}

The present invention relates to a composite film for euroforms, which is widely used as formwork when constructing civil and building concrete structures such as concrete buildings, retaining wall structures, box-shaped structures, etc. In the present invention, instead of replacing damaged coated plywood of euroforms, When reinforcement composite material is applied by water lamination method, simply repair the damaged coated plywood to regenerate euroform, or replace or form new plywood, the surface of plywood is strengthened by coating the composite film on the surface of plywood. This is a Eurofoam coating using composite materials that can reduce damage and prevent water from being absorbed by plywood to improve the quality of concrete.

Eurofoam is widely used as formwork for forming concrete for building construction and civil engineering structures, such as bridges, buildings, retaining walls, culverts, reservoirs, etc. Silver is a standard formwork that is easy to assemble and dismantle and can be handled by manpower because it is lighter than steel formwork.

Eurofoam is usually composed of a mold and plywood, and the plywood mainly uses a coated plywood. The mold is generally made of steel and used repeatedly. If damaged, the coated plywood is replaced. In other words, the Euroform is damaged due to careless handling during installation or demoulding process, and if the damaged Euroform is used, the quality of the concrete surface becomes poor, so the coated plywood is replaced whenever necessary.

Eurofoam's coated plywood used in the conventional method is treated with water absorption prevention, but the surface of the coated plywood is damaged due to repeated use, and the water absorption rate is increased, so that the concrete surface becomes coarse and absorbs moisture. When demolding, the color coated on the plywood may be soaked into the concrete surface.In addition to the disadvantages of durability, the plywood is easily deformed due to humidity.In addition, Eurofoam's coated plywood does not have high strength. It is very weak and easy to break.

In this way, the coated plywood of the Eurofoam, which is damaged due to concrete placing and form assembly and disassembly, is replaced and reassembled after being replaced regardless of the number of times. As a result, the number of times the Euroform can be used only 12 to 20 times is actually used only about 3 to 5 times.

In addition, since most of the coated plywood used in Euroform depends on imports, frequent replacement of the coated plywood increases the use of plywood, increasing the cost and increasing the import of wood due to the abuse of the wood, thereby deteriorating the international balance of payment. After the replacement, there is a problem in terms of environmental aspects because of the additional cost for the disposal of the remaining plywood.

Particularly, in the prior art, when the foam is damaged at the construction site, the heavy and bulky euro foam must be collected and transported to the repair shop, and then the plywood must be replaced and put back into the site, resulting in high costs for transportation and repair. The burden is on construction costs.

The present invention is a fiber-reinforced composite film that can be easily reused by simply repairing the damaged coated plywood of Euroform using fiber reinforced composite material to reduce the manpower and cost of uniformly replacing the damaged coated plywood of Euroform as described above. The purpose is to provide.

Instead of replacing the damaged coated plywood, a composite film made of a reinforcing fiber and resin is applied to the surface of the damaged coated plywood to regenerate the euro foam, thereby enabling more economical use of the euro foam, thereby reducing construction costs.

The material for the composite coating used for the recovery of the coated plywood is lightweight, so it is easy to transport, and it is possible to simply recycle and use the damaged Euroform on site without transporting it to the repair shop, thereby reducing the cost of transporting and repairing the damaged Euroform. It can reduce the construction time and reduce the construction time by reducing the Eurofoam repair time.

Figure 1 is a perspective view showing the shape of the flow path regenerated using the fiber-reinforced composite film of the present invention.

Figure 2 shows a cross-sectional view of the flow path regenerated using the fiber-reinforced composite film of the present invention.

Figure 3 shows the appearance of repairing the damaged coated plywood using the fiber-reinforced composite film of the present invention.

Figure 4 shows the form of the reinforcing fibers used in the fiber-reinforced composite film of the present invention.

<Brief description of the main parts of the drawing>

100 Composite film 110 Impregnated reinforcing fiber

150 Composite Film Application Tool 200 Plywood

210 Plywood Damaged 300 Euroform Mold

500 Recycled Euroform 510 Recycled Euroform Cross Section

In order to achieve the above object, the present invention provides a fiber-reinforced composite film that allows the user to repeatedly use the damaged coating plywood of the euro-foam simply by using the film of the euro-foam formwork using the fiber-reinforced composite material.

The reinforcing fibers used in the fiber-reinforced composite coating according to the present invention are composed of woven fabrics, stitch woven fabrics, and fiber mats woven using glass fibers, carbon fibers, aramid fibers, or basalt fibers. The reinforcing fibers may be produced by impregnating a resin such as a polyester resin, a vinyl ester resin, an epoxy resin, a phenol resin, or the like by using a water-laminated layer or an environmental method.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and embodiment of the present invention.

Figure 1 schematically shows a flow path regenerated using a fiber-reinforced composite film according to the present invention. Euroform is usually composed of the mold 300 and the coated plywood 200, the mold is generally used repeatedly made of steel and coated plywood is used to replace when damage occurs.

The fiber-reinforced composite coating of the present invention is laminated with reinforcing fibers on the damaged coated plywood 200, and then reinforcing fibers impregnated in the resin by a water lamination method using a composite coating application tool 150 such as a roller (110). ) Is completely adhered to the coated plywood and curing is completed and completely cured, the composite film 100 forms a new coating surface. Even if there are some breakages 210 in the coated plywood composite material using the reinforcing fibers impregnated with the resin has a high strength, so it supports the pressure of the concrete without problems in the process of pouring concrete.

FIG. 2 is a cross-sectional view of a flow path regenerated by using a composite film, and the composite film 100 formed by coating on a coated plywood 200 fixed to the mold 300 of the flow path forms a physically and chemically stable structure. do.

3 is a view showing a state of repairing the damaged coated plywood 200 of the Eurofoam using the composite film, looking at the method for regenerating the damaged coated plywood of the Eurofoam using the composite film 100 according to the design, First, clean the surface of the coated plywood of Euroform to be repaired with a grinder or other equipment. When using grinders, care must be taken not to apply excessive force to the plywood, further damaging the plywood or making the surface uneven.

After surface-treating the plywood surface of Eurofoam, reinforcing fibers such as glass fiber, carbon fiber, aramid fiber or Basalt fiber, which are cut to the specifications of Eurofoam are laminated on the coated plywood 200, and then polyester resin and vinyl ester resin. Resin, such as epoxy resin or phenol resin, is impregnated into the reinforcing fiber using a composite film application tool 150, such as impregnator and roller. At this time, the air between the reinforcing fibers should be removed sufficiently, and the impregnation work is performed so that the resin is sufficiently impregnated with the reinforcing fibers, and the curing time is well controlled so that the resin does not harden in the middle of the work. When the impregnation is completed, a thin nonwoven fabric is laid on the resin-impregnated reinforcing fiber to smooth the surface so that the surface of the composite coating can be cleared after the resin is cured.

4 is a perspective view showing the application of the fiber-reinforced composite film 100 to the surface of the plywood 200 fixed to the mold 300 of the flow path.

In the above described the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited to this, it is possible to be freely modified according to the technical idea of the present invention.

As described above, the fiber-reinforced composite coating of the present invention can be used more economically because the damaged coated plywood can be simply regenerated and repeatedly used without replacing the damaged coated plywood.

In this design, we can prevent moisture absorption by attaching fiber-reinforced composite film that does not absorb water on the damaged coated plywood surface of Eurofoam. Therefore, it prevents the outflow of water during the curing process of concrete, thereby smoothing the curing of concrete. It can prevent the concrete surface from sticking to the plywood.

The formwork surface recycled using the composite film of the present invention is better than the first coated plywood or steel formwork, which can greatly improve the quality of the constructed concrete surface.

Since the composite film of the present invention has a very high strength, it is not easily damaged from external impact during transportation, installation and disassembly of the eurofoam, so that damage to the formwork surface can be minimized during use, which can dramatically increase the number of dedicated dies. have.

The form surface of the Euroform recycled using the composite foam film for regenerating the Eurofoam of the present invention has good peelability and does not require much use of the release agent. Since the composite film is very thin and lightweight, there is almost no increase in the thickness of the plywood after repairing the plywood. Since the weight of Euroform hardly increases, there is no problem in construction.

If the Euroform regenerated by the fiber-reinforced composite film of the present invention needs to be repaired due to partial damage to the composite film after a certain period of use, the surface of the damaged area should be surface treated and the reinforcing fibers should be laid in accordance with the damaged area. It can be easily repaired and reused by impregnation with resin, thus minimizing repair cost due to damage.

In this way, the fiber-reinforced composite film of the present invention can be used repeatedly and repeatedly after the damaged coating plywood of Eurofoam, so that the amount of plywood can be greatly reduced, thereby reducing the amount of imported wood, thereby improving the international balance of resin. In addition, the amount of waste plywood generated by replacement of damaged coated plywood of Eurofoam can be greatly reduced, thereby significantly reducing the cost of waste plywood treatment and environmentally friendly design.

In addition, in the case of replacing the plywood of completely damaged Eurofoam or manufacturing new Eurofoam, instead of coating the plywood, the composite film is applied to strengthen the surface to reduce the damage of the surface of the plywood and to prevent moisture from being absorbed by the plywood. This can improve the quality of the concrete surface.

Claims (3)

Eurofoam using fiber-reinforced composite material, which is installed with a film impregnated with a reinforcing fiber on the surface of the Eurofoam plywood when regenerating or replacing the Eurofoam plywood used as formwork when constructing civil and concrete structures. Plywood The method of claim 1, wherein the reinforcing fibers used in the composite coating is made of one selected from glass fibers, carbon fibers, aramid fibers in the form selected from woven woven fabric, stitch woven fabric, fiber mat, the resin is poly Film of Eurofoam plywood using fiber-reinforced composite material characterized by using one selected from ester resin, vinyl ester resin, phenol resin and epoxy resin 3. The film of Eurofoam plywood using a fiber-reinforced composite material according to claim 2, wherein a thin nonwoven fabric is provided on the reinforcing fibers impregnated with the resin to smooth the surface.