KR100469292B1 - Waterproofing method of concrete - Google Patents

Abstract

The present invention has been made for the purpose of presenting an effective waterproofing method using FRP.

To this end, the present invention in the waterproofing construction using the FRP, to form a waterproofing layer coated with FRP in the state anchored to the concrete bolts at a predetermined interval, the waterproofing layer and the concrete integrated by the anchor bolt We propose a new method of waterproofing concrete structures to prevent the concrete and FRP waterproofing layer from being separated by binding them.

The present invention has a high durability and perfect waterproof effect by the separation of the FRP waterproofing layer and concrete by the anchor bolt, has the effect of reducing the management cost, such as shortening or maintenance of waterproofing work. .

Description

Waterproofing method of concrete structure {WATERPROOFING METHOD OF CONCRETE}

The present invention relates to a method for waterproofing various concrete structures, and more particularly, to a waterproofing method using FRP as a main material.

Due to its moisture permeability, concrete structures are required to be waterproofed to the outside parts of the structure such as the outer wall of the structure or the upper surface of the slab.

Conventionally, a method of coating an asphalt liquid on an outer surface of a slab or the like with a material mixed with an epoxy resin or cement with a waterproofing liquid is generally used for waterproofing, and a waterproofing method using FRP is also known as a test. .

The waterproofing method using asphalt liquid, epoxy resin or waterproofing liquid has a long time to harden and the construction method is very difficult. Above all, water leakage occurs due to cracking and perfect waterproof effect can be expected. There is a problem in that the cost of facility management is increased due to the need for regular maintenance.

On the other hand, the waterproofing method using FRP is made of a thin coating on the inner wall of the slab or tank tank has the advantage of shortening the air and excellent waterproofing effect, but is separated from the concrete over time without binding with heterogeneous concrete Due to the problem that the leakage phenomenon through the gap of the boundary is still not a practical waterproof treatment method.

The present invention aims at the practical use of the waterproofing method using FRP, and for this purpose, the present invention proposes a treatment method that can prevent the separation of concrete and FRP, which was a problem in the conventional FRP waterproofing method, and also prevents the waterproofing of FRP. By suggesting a new configuration of the treatment method, it is designed to enable economic and perfect waterproof effect.

Hereinafter, the present invention will be described in detail with reference to the following examples.

1 is a structural diagram of a waterproof layer according to the present invention

Figure 2 is a step-by-step process chart of the present invention

Figure 3 is an enlarged view of the anchor bolt

Figure 4 is a plan view of the anchor bolt fixed

* Description of the major symbols

1.Slab 2.Wire Mesh 3.Anchor Bolt

4. FRP coating layer 5. Glass fiber coating layer 6. FRP coating layer

7.gel coat

In the present invention, when the waterproofing construction using the FRP, concrete and FRP coating layer is to be integrally bound by a thin wire mesh on the concrete floor and anchor bolts embedded in the concrete at regular intervals to separate the concrete and FRP coating layer It has a technical idea to prevent.

A general embodiment of the present invention is to lay a wire mesh on a concrete body, such as an inner wall of a slab or a water tank, and anchor bolts at regular intervals between the wire mesh to apply an FRP to form an FRP coating layer, and the glass thereon Covering the fiber to form a glass fiber coating layer, it is made of a configuration to form a FRP coating layer by applying FRP again on the glass fiber coating layer.

Figure 1 shows an embodiment of the present invention described above, the structure of the waterproofing process according to the present invention is a low-layer FRP coating layer 4 and the glass fiber coating layer (5) thereon and applied to contact with the concrete (1) and It is composed of FRP coating layer 6 applied on the surface of glass fiber coating layer 5, and the surface of FRP coating layer 6 on the surface is finished by painting or gel coating 7, etc. according to the characteristics of the structure. Has

In the above structure, the upper and lower FRP coating layer and the glass fiber coating layer constituting the waterproofing part are themselves plastic-based composite materials reinforced with fibers, and because they have strong mutual binding power, they are combined together at the same time with the construction. (2) and anchor bolts (3) are bound.

2 is a step-by-step construction process of the structure as a step of laying a wire mesh (2) and anchor bolts on the concrete surface at a predetermined interval (a), and applying the FRP in the state of cleaning and removing foreign substances on the surface A process (b), a process of laying the glass fibers (c) and applying the FRP thereon (d) before the FRP is cured, and finally a process of gelcoat or painting (e).

In the wire mesh anchor bolt (2) is a bolt having a head having a diameter (d) of about 2mm, a height (h) of about 15mm, as shown in Figure 3, and is embedded in concrete using a machine such as a gunship, By adjusting the penetration pressure so that the penetration depth (h1) is in the range of 12-13mm, the bolt head (h2) exposed from the concrete surface is projected in the range of 2-3mm, and some parts are inserted deeply to fix the wire mesh. .

The spacing L1 and L2 of each anchor bolt 3 is such that 200-300 mm is maintained as shown in FIG.

The FRP coating layer 4 formed on the bottom layer is formed at a height of about 1 mm, the glass fiber coating layer 5 is about 2 mm, and the final FRP coating layer 6 is coated so as to have a thickness of about 2-3 mm.

In the above embodiment, the head of the anchor bolt 3 slightly protrudes from the FRP surface of the bottom layer, and the protruding portion is covered by the glass fiber and the upper FRP coating layer and buried in the waterproofing part, and part of the anchor bolt Completely penetrates to ensure that the wire mesh is fixed to the concrete.

The screw heads of wire mesh and anchor bolts maintain and strengthen the binding force between the waterproofing part and the concrete. The middle glass fiber coating layer secures the effective waterproofing part thickness while reducing the use of expensive FRP, and the upper and lower FRP coating layers. It acts as a buffer to prevent cracking of the waterproofing part due to external impact.

The FRP coating layer on the surface acts to provide a clean finish by protecting the surface along with waterproofing.

The structure of the anchor bolt or the waterproof treatment as exemplified above may be implemented in various standards and structures according to the shape of the structure. In the case of installing a heavy material on the upper part of a slab or a large water tank largely affected by hydraulic pressure, The overall thickness and the anchor bolt size and spacing can be adjusted accordingly.

The present invention by the above can be carried out in various forms to have a technical idea to prevent the separation of the FRP and concrete after construction by the anchor bolt and the wire mesh, embodiments represented in each drawing is preferred of the present invention It is described as an embodiment and is not intended to limit the basic idea of the present invention, and various embodiments for realizing the basic idea of the present invention are not excluded.

The present invention solves the phenomenon of lifting by the separation of concrete, which was the biggest problem when waterproofing using FRP by applying anchor bolts and wire mesh, can be practically carried out FRP waterproofing treatment with high durability and perfect waterproof effect To have one effect.

In addition, the waterproofing method according to the present invention can be used without limitation, such as the slab having a complex surface shape or the inner wall of the tank by the excellent moldability of the FRP, very light to give little burden on the structure, waterproof by appropriate use of the curing agent The air of the treatment work can be significantly shortened, and the work is easy, and the cost can be reduced.

In addition, by exhibiting a continuous waterproof effect by the buffer and the durability of the FRP itself realized by the glass fiber coating layer has the effect of reducing the management cost required for maintenance.

Claims (3)

In the waterproofing construction using FRP, the waterproofing layer and the concrete are formed by the anchor bolts by forming the waterproofing layer which is coated with FRP while laying the wire mesh on the concrete floor and anchoring bolts to the concrete at regular intervals. Waterproofing method of a concrete structure, characterized in that to prevent the concrete and the FRP waterproofing layer is separated by binding integrally. 2. The FRP coating layer according to claim 1, wherein the waterproofing layer is coated on the surface of the low-layer FRP coating layer 3 coated in contact with the concrete 1 and the glass fiber coating layer 4 and the glass fiber coating layer 4 thereon. Waterproofing method of the concrete structure, characterized in that formed by sequentially performing (5). 3. The anchor bolt 2 has a diameter of about 2 mm, a height of about 15 mm, and a penetration depth into the concrete in the range of 12 to 13 mm, and the interval between each anchor bolt 2 is maintained at 200 to 300 mm. The FRP coating layer 3 formed on the bottom layer is formed to a height of about 1mm, the glass fiber coating layer 4 is about 2mm, and the final FRP coating layer 5 is constructed so as to have a thickness of about 2-3mm. Waterproofing method of a concrete structure, characterized in that.