KR102623671B1 - Bridge surface waterproof structure using geo-grid felt and geo-grid felt manufacturing device - Google Patents

Abstract

The present invention relates to a bridge surface waterproofing structure using geogrid felt and a geogrid felt manufacturing device. The coating waterproof layer includes 15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, fine powder aggregate, and slaked lime. , consisting of 4 to 10% by weight of one of the fly ash materials, 0.1 to 2% by weight of cellulose fiber, and 0.001 to 1% by weight of a stabilizer; Geogrid felt is composed of a grid in which two or more lines made by twisting multiple glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and a mesh-shaped non-woven fabric layer that is attached to one surface of the grid by heat compression. However, grid-shaped grid seating grooves are formed in the non-woven fabric layer, so that when the grid and the non-woven fabric layer come into close contact, the grid is seated in the grid seating grooves of the non-woven fabric layer. Therefore, the tensile performance and shear adhesion performance of the coating waterproof layer are improved, the flowability of the asphalt AP is improved, making the application of the coating waterproof layer easier, and when the grid and the non-woven layer are in close contact, the grid is placed in the grid seating groove of the non-woven layer. Because it is seated, the bonding strength between the grid and the non-woven fabric layer increases, so the geogrid felt is more firmly fixed to the waterproof film layer and the asphalt pavement layer.

Description

Bridge surface waterproof structure using geo-grid felt and geo-grid felt manufacturing device}

The present invention relates to a bridge waterproofing structure using geogrid felt and a geogrid felt manufacturing device. More specifically, the tensile performance and shear adhesion performance of the coating waterproof layer are improved, the application of the coating waterproof layer is facilitated, and the grid and non-woven layer are improved. Bridge waterproofing structure using geogrid felt, which further improves the bonding strength of the coating waterproof layer, geogrid felt, and asphalt pavement layer, as the coating waterproof layer and asphalt pavement layer flow into the intersection of the grid through the communication holes of the non-woven fabric layer. It is about geogrid felt manufacturing equipment.

Generally, an asphalt pavement layer for vehicle passage is laid on the concrete structure that forms the upper deck of a bridge.

However, due to severe plastic deformation in response to the temperature or load of the asphalt pavement layer, cracks and road surface deformation easily occur, and external factors such as use of heterogeneous concrete and asphalt pavement materials, water permeability or temperature changes cause lifting, peeling, cracking, etc. Because this occurs, frequent repair work is required.

In particular, the durability of the asphalt pavement layer is reduced due to impacts from traffic loads, weather changes, and penetration of rainwater and calcium chloride for snow removal, so gaps and pot holes can easily occur. Moisture or exhaust gases leak through these gaps. There is a problem that external foreign substances such as penetrating into the concrete structure ultimately cause aging or corrosion of the concrete structure.

In order to solve this problem, there is a known method of applying a waterproof layer on a concrete structure and then laying an asphalt pavement layer on top of it.

In other words, as a bridge waterproofing method, a method of constructing a waterproof film layer and geogrid felt between the concrete structure and the asphalt pavement layer is used.

Here, as a bridge waterproofing method, a waterproof film layer and geogrid felt are constructed between the concrete structure and the asphalt pavement layer, and the construction method is as follows.

The steps include applying a primer, a type of adhesive, to a concrete structure that has been cut and cleaned from an old bridge surface, applying a waterproof film layer such as a sealant on top of the primer, and laying geogrid felt on top of the waterproof film layer for adhesive bonding with the asphalt pavement layer. It progresses through the steps of laying an asphalt pavement layer on top of geogrid felt.

Accordingly, the coating waterproof layer performs a waterproof function to prevent rainwater, etc. from penetrating into the bridge surface, and the geogrid felt functions to improve the adhesive bond between the coating waterproof layer and the asphalt pavement layer.

Moreover, the geogrid felt is a protective layer that improves the durability of the asphalt pavement layer and distributes the stress transfer of the structure and pavement during vehicle braking and impact loads, and is applied to the coating film by heat (140-160°C) during asphalt pavement. As part of the waterproof layer melts, it functions to bond the waterproof coating layer and the asphalt pavement layer together.

For this purpose, the geogrid felt is a grid in which two or more lines made by twisting a plurality of glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and a mesh-type nonwoven fabric that is attached by heat compression to one surface of the grid. It consists of layers.

However, even if the geogrid felt integrally bonds the coating waterproof layer and the asphalt pavement layer as described above, it cannot overcome repeated live loads and vehicle loads, and its adhesive strength decreases over time, eventually causing part of the geogrid felt to lift, causing the geogrid felt to break. There were problems such as separation of the surface and deterioration of the function of the waterproof layer below it.

To solve this problem, conventionally, protruding fibers combined with the coating waterproof layer are bound at each intersection of the grid that makes up the geogrid felt, so that not only the surface of the grid is adhered to the coating waterproof layer by heat during asphalt paving, but also each intersection of the grid. By allowing the protruding fibers bound to the coating waterproof layer to be adhered, it was possible to prevent peeling of the geogrid felt and at the same time increase the bonding strength between the coating waterproof layer and the asphalt pavement layer.

However, the task of individually binding the protruding fibers at each intersection of the geogrid felt is very cumbersome, and as a result, there is a problem in that the manufacturing time and manufacturing cost of the geogrid felt increase.

Republic of Korea Patent No. 10-2336803

The purpose of the present invention to solve the above-mentioned problems is to provide a bridge waterproofing structure using geogrid felt and a geogrid felt manufacturing device that improves the tensile performance and shear adhesion performance of the coating waterproof layer and facilitates the application of the coating waterproof layer. I'm doing it.

Another object of the present invention is to provide a bridge waterproofing structure using geogrid felt that increases the bonding force between the grid and the non-woven fabric layer and a geogrid felt manufacturing device.

Another object of the present invention is to provide a bridge surface using geogrid felt that further improves the bonding strength of the coating waterproof layer, geogrid felt, and asphalt pavement layer because the coating waterproof layer and the asphalt pavement layer flow into the intersection of the grid through the communication holes of the non-woven fabric layer. The purpose is to provide waterproof structures and geogrid felt manufacturing equipment.

The bridge surface waterproofing structure using the geogrid felt of the present invention to achieve this purpose includes a primer applied on a concrete structure obtained by cutting and cleaning the aged bridge surface, a coating waterproof layer applied on the primer, and a geogrid felt laid on the coating waterproofing layer, In a bridge waterproofing structure consisting of an asphalt pavement layer laid on geogrid felt, the coating waterproof layer is composed of 15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, fine powder aggregate, slaked lime, and fry ash. It consists of 4 to 10% by weight of one of the materials, 0.1 to 2% by weight of cellulose fiber, and 0.001 to 1% by weight of stabilizer; Geogrid felt is composed of a grid in which two or more lines made by twisting multiple glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and a mesh-shaped non-woven fabric layer that is attached to one surface of the grid by heat compression. However, grid-shaped grid seating grooves are formed in the non-woven fabric layer, so that when the grid and the non-woven layer come into close contact, the grid is seated in the grid seating grooves of the non-woven fabric layer.

Another feature of the bridge waterproofing structure using the geogrid felt of the present invention is that communication holes are formed in orthogonal portions of the grid seating grooves of the non-woven layer, and intersecting portions of the grid are located in the communication holes, so that the coating waterproof layer and the asphalt pavement layer are Since it flows into the intersection of the grid through the communication hole, it is provided to improve the bonding strength of the coating waterproof layer, geogrid felt, and asphalt pavement layer.

Another feature of the bridge surface waterproofing structure using the geogrid felt of the present invention is that a grid is provided in the grid seating groove of the non-woven fabric layer, and the upper surface of the grid is provided to be covered with an auxiliary non-woven fabric layer, so that the grid is provided as a grid of the non-woven fabric layer. After being stored in the seating groove, it is covered with an auxiliary non-woven fabric layer and is stored between the non-woven fabric layer and the auxiliary non-woven fabric layer.

The geogrid felt manufacturing apparatus of the present invention for achieving the same purpose as described above is an apparatus for manufacturing the geogrid felt with a bridge waterproof structure of claim 1, wherein a plurality of layers are placed at equal intervals on the non-woven fabric layer that is seated on the conveyor and transported along the conveyor. A first grid seating groove processing part forming a first grid seating groove of; It includes a second grid seating groove processing portion provided on one side of the first grid seating groove processing portion and forming a second grid seating groove in the nonwoven fabric layer to be perpendicular to the first grid seating groove; The first grid seating groove processing unit is provided with a first drive motor, a first rotation axis connected to the axis of the first drive motor and rotated by the first drive motor, and is provided at equal intervals on the first rotation axis and rotates while pressing the nonwoven fabric layer. It consists of first pressure rollers that form a first grid seating groove when the non-woven fabric layer is transported along the conveyor; The second grid seating groove processing unit is provided with a second drive motor, a second rotation axis connected to the axis of the second drive motor and rotated by the second drive motor, and is provided at equal intervals on the second rotation axis and rotates while pressing the nonwoven fabric layer. second pressure rollers that form second grid seating grooves orthogonal to the first grid seating groove in the nonwoven fabric layer, a second drive motor, a holder supporting the first rotation axis, and a holder connected to the holder so that the holder is connected to the first grid. It is characterized by being composed of a transfer cylinder that transfers in a direction perpendicular to the seating groove so that second grid seating grooves are formed in the nonwoven fabric layer.

The present invention as described above has the following advantages.

First, the coating waterproof layer is made by mixing styrene-butadiene-styrene, asphalt AP, fine powder aggregate, slaked lime, fly ash, cellulose fiber, and stabilizer at a certain ratio, thereby improving tensile performance and shear adhesion. Performance is improved, and the flowability of asphalt AP is improved, making the application of the waterproofing layer easier.

Second, grid-shaped grid seating grooves are formed in the non-woven fabric layer of the present invention, so that when the grid and the non-woven layer come into close contact, the grid is seated in the grid seating grooves of the non-woven fabric layer. Therefore, the bonding strength between the grid and the non-woven layer is increased, so the geogrid felt is more firmly fixed to the waterproof film layer and the asphalt pavement layer.

Third, in the present invention, communication holes are formed in orthogonal portions of the grid seating grooves of the non-woven fabric layer, and intersecting portions of the grid are located in these communication holes. Therefore, since the coating waterproof layer and the asphalt pavement layer flow into the intersection of the grid through the communication hole, the bonding strength of the coating waterproof layer, the geogrid felt, and the asphalt pavement layer is further improved.

Fourth, in the present invention, a grid is seated in the grid seating groove of the non-woven fabric layer, and an auxiliary non-woven layer is provided on the upper surface of the grid to cover the open portion of the grid seating groove. Therefore, the grid is stored in the grid seating groove of the non-woven fabric layer, then covered with the auxiliary non-woven fabric layer, and stored between the non-woven fabric layer and the auxiliary non-woven fabric layer. In this state, the geogrid felt is between the coating waterproof layer and the asphalt paving layer. is compressed into Therefore, since the grid is inserted into the non-woven fabric layer and the auxiliary non-woven fabric layer, the bonding force between the non-woven fabric layer and the grid is further increased.

Figure 1 is a schematic separated cross-sectional view showing the bridge waterproofing structure using the geogrid felt of the present invention.
Figure 2 is a schematic partial perspective view showing the first embodiment of the nonwoven layer of the geogrid felt of the present invention.
Figure 3 is a side cross-sectional view of Figure 2
Figure 4 is a schematic exploded perspective view showing the geogrid felt of the present invention
Figure 5 is a schematic partial perspective view showing the second embodiment of the nonwoven layer of the geogrid felt of the present invention.
Figure 6 is a side cross-sectional view of Figure 5
Figure 7 is a schematic exploded perspective view showing the third embodiment of the geogrid felt of the present invention.
Figure 8 is a schematic partial plan view showing the geogrid felt manufacturing apparatus of the present invention

Specific features and advantages of the present invention will become clearer from the following description with reference to the accompanying drawings.

Figure 1 is a schematic separated cross-sectional view showing a bridge waterproofing structure using the geogrid felt of the present invention, Figure 2 is a schematic partial perspective view showing the first embodiment of the non-woven layer of the geogrid felt of the present invention, and Figure 3 is a side view of Figure 2. It is a cross-sectional view, and Figure 4 is a schematic exploded perspective view showing the geogrid felt of the present invention.

The bridge surface waterproofing structure using the geogrid felt of the present invention includes a primer (20) applied on a concrete structure (10) obtained by cutting and cleaning the aged bridge surface, a film waterproofing layer (30) applied on the primer (20), and a film waterproofing layer. (30) It consists of a geogrid felt (40) laid on top, and an asphalt pavement layer (50) laid on top of the geogrid felt (40).

The coating waterproof layer 30 is composed of 15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, 4 to 10% by weight of one of fine powder aggregate, slaked lime, and fly ash, and cellulose fiber. It consists of 0.1 to 2% by weight and 0.001 to 1% by weight of stabilizer.

Asphalt AP, as a raw material, is produced in the process of refining crude oil at an oil refinery. This asphalt AP is a sticky visco-elastic material at room temperature, and its physical properties change depending on the temperature. It is solid at low temperatures (0℃ or lower), and viscoelastic at room temperature (0~100℃).

This type of asphalt AP is mixed at 70 to 80% by weight. If the mixing ratio of asphalt AP is less than 70% by weight, the adhesion decreases, and if the mixing ratio of asphalt AP exceeds 80% by weight, the adhesion increases excessively and the applicability decreases accordingly. Therefore, it is desirable to mix 70 to 80% by weight of asphalt AP.

Styrene-butadiene-styrene is a styrene-butadiene-styrene block copolymer (SBS) product polymerized in an organic solvent. Due to its molecular structure, SBS is a thermoplastic elastomer (thermoplastic) that is highly elastic and has excellent strain recovery without the need for a vulcanization process. elastomer).

It is preferable that 15 to 20% by weight of styrene-butadiene-styrene is mixed. If the mixing ratio of styrene-butadiene-styrene is less than 15% by weight, elasticity is reduced, and if it exceeds 20% by weight, elasticity is not significantly improved, but the manufacturing cost increases significantly due to the excessive content of expensive products. There is. Therefore, it is desirable to mix 15 to 20% by weight of styrene-butadiene-styrene.

Among the coating waterproof layer 30 of the present invention, cellulose fiber refers to the general term for fibers containing cellulose as a main component. Cellulose fiber is used for paper, pulp, etc., and improves the flowability of asphalt AP to make it viscous, thereby providing convenience of work. do

These cellulose fibers are mixed in an amount of 0.1 to 2% by weight. If the mixing ratio of cellulose fibers is less than 0.1% by weight, there is a problem that the coating waterproof layer 30 flows too much, and if the mixing ratio of cellulose fibers exceeds 2% by weight, there is a problem that the flowability of the coating waterproofing layer 30 is greatly reduced. . Therefore, it is desirable to mix 0.1 to 2% by weight of cellulose fiber.

[Table 1] below shows the standard values presented by the Ministry of Land, Infrastructure and Transport, the result values according to the present invention, and the result values when adding or reducing specific components among the components of the present invention.

Tensile performance Tensile strength (N/㎟)
20℃ standard Example 1 Example 2 In practice 3 Example 4 Untreated 1.5 or higher 1.81 1.60 1.37 1.76 Alkaline treatment More than 80% of untreated 1.59 1.35 1.23 1.43 Heat treatment More than 80% of untreated 1.66 1.42 1.35 1.47 Elongation rate (%)
20℃ Untreated 100 or more 967 852 559 865 Alkaline treatment More than 80% of untreated 870 683 462 693 Heat treatment More than 80% of untreated 857 657 486 698 shear
adhesion
Performance Shear bond strength (N/㎟) -20℃ 0.80 or higher 1.25 0.92 0.65 1.16 20℃ 0.15 or higher 0.28 0.11 0.09 0.18 Shear adhesive strain (%) -20℃ 0.5 or more 3.3 1.60 0.59 0.83 20℃ 1.0 or higher 4.4 2.7 1.8 3.5 Tensile adhesive strength (N/㎟) -20℃ 1.2 and above 1.60 1.27 1.14 1.51 20℃ 0.6 or higher 0.72 0.53 0.45 0.67

In [Table 1], the standards are the standard values from the Ministry of Land, Infrastructure and Transport. Example 1 shows the results according to the present invention. Example 2 is a case where more asphalt AP was added than the range of the present invention in the component ratio of the present invention. Example 3 is a case where the SBS component was added in a smaller amount than the range of the present invention in the component ratio of the present invention. Example 4 is a case where more asphalt AP was added than Example 2.

In this way, when the coating waterproof layer 30 of the present invention satisfies the component ratio of the present invention, it can be confirmed that the tensile strength, elongation, shear bond strength, shear bond strain, and tensile bond strength are maintained at an optimal state.

The waterproof coating layer 30 of the present invention has excellent oil absorption, low viscosity, excellent dispersibility, and excellent processability. In addition, the waterproof coating layer 30 of the present invention has a radial molecular structure and has excellent mechanical properties and excellent adhesion.

The geogrid felt (40) is made by twisting a plurality of glass fiber warp yarns into a grid (46) in which two or more lines are arranged in a grid-like structure in the horizontal and vertical directions, and heat-pressed on one surface of the grid (46). It consists of a mesh-shaped non-woven fabric layer 41 attached.

In the non-woven fabric layer 41, grid-shaped grid seating grooves 42 are formed, so that when the grid 46 and the non-woven fabric layer 41 are in close contact, the grid 46 is formed in the grid seating groove 42 of the non-woven fabric layer 41. ) is settled on.

Accordingly, since the bonding force between the grid 46 and the non-woven fabric layer 41 is increased, the geogrid felt 40 is more firmly fixed to the waterproof film layer 30 and the asphalt pavement layer 50.

Figure 5 is a schematic partial perspective view showing the second embodiment of the nonwoven fabric layer 41 of the geogrid felt 40 of the present invention, and Figure 6 is a side cross-sectional view of Figure 5.

This geogrid felt 40 includes a grid 46 in which two or more lines made by twisting a plurality of glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and heat-compression bonded to one surface of the grid 46. It consists of a mesh-shaped non-woven fabric layer (41) attached.

In the non-woven fabric layer 41, grid-shaped grid seating grooves 42 are formed, so that when the grid 46 and the non-woven fabric layer 41 are in close contact, the grid 46 is formed in the grid seating groove 42 of the non-woven fabric layer 41. ) is settled on. Accordingly, since the bonding force between the grid 46 and the non-woven fabric layer 41 is increased, the geogrid felt 40 is more firmly fixed to the waterproof film layer 30 and the asphalt pavement layer 50.

In addition, a communication hole 45 is formed in the orthogonal portion of the grid seating groove 42 of the non-woven fabric layer 41, and the intersection part of the grid 46 is located in the communication hole 45, so that the coating waterproof layer 30 And the asphalt pavement layer 50 flows into the intersection of the grid 46 through the communication hole 45. Accordingly, the bonding strength of the waterproofing layer 30, the geogrid felt 40, and the asphalt pavement layer 50 is improved.

Figure 7 is a schematic exploded perspective view showing the third embodiment of the geogrid felt of the present invention.

This geogrid felt 40 includes a grid 46 in which two or more lines made by twisting a plurality of glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and heat-compression bonded to one surface of the grid 46. It consists of a mesh-shaped non-woven fabric layer (41) attached.

In the non-woven fabric layer 41, grid-shaped grid seating grooves 42 are formed, so that when the grid 46 and the non-woven fabric layer 41 are in close contact, the grid 46 is formed in the grid seating groove 42 of the non-woven fabric layer 41. ) is settled on. Accordingly, since the bonding force between the grid 46 and the non-woven fabric layer 41 is increased, the geogrid felt 40 is more firmly fixed to the waterproof film layer 30 and the asphalt pavement layer 50.

In addition, a communication hole 45 is formed in the orthogonal portion of the grid seating groove 42 of the non-woven fabric layer 41, and the intersection part of the grid 46 is located in the communication hole 45, so that the coating waterproof layer 30 And the asphalt pavement layer 50 flows into the intersection of the grid 46 through the communication hole 45. Accordingly, the bonding strength of the waterproofing layer 30, the geogrid felt 40, and the asphalt pavement layer 50 is improved.

In addition, the grid 46 is seated in the grid seating groove 42 of the non-woven fabric layer 41, and the upper surface of the grid 46 is covered with an auxiliary non-woven fabric layer 47, so that the grid 46 is After being stored in the grid seating groove 42 of the non-woven fabric layer 41, it is covered with the auxiliary non-woven fabric layer 47, and is stored between the non-woven fabric layer 41 and the auxiliary non-woven fabric layer 47.

Therefore, the grid 46 is stably and firmly coupled to the geogrid felt 40 by the non-woven fabric layer 41 having the grid seating groove 42 and the auxiliary non-woven fabric layer 47 serving as a cover.

Figure 8 is a schematic partial plan view showing the geogrid felt manufacturing apparatus of the present invention.

The present invention includes a first grid seating groove processing portion 60 and a second grid seating groove processing portion 70.

The first grid seating groove processing unit 60 is seated on a conveyor (not shown) and forms a plurality of first grid seating grooves 43 at equal intervals on the nonwoven fabric layer 41 transported along the conveyor.

This first grid seating groove processing part 60 is connected to the first drive motor 61 and the axis of the first drive motor 61 and is rotated by the first drive motor 61. and a first pressure roller that is provided at equal intervals on the first rotation shaft 62 and rotates while pressing the non-woven fabric layer 41 to form the first grid seating groove 43 when the non-woven fabric layer 41 is transported along the conveyor. It consists of (63).

The second grid seating groove processing part 70 is provided on one side of the first grid seating groove processing part 60 and forms a second grid seating groove 44 in the nonwoven fabric layer 41 so as to be perpendicular to the first grid seating groove 43. form.

This second grid seating groove processing part 70 is connected to the second drive motor 71 and the axis of the second drive motor 71 and is rotated by the second drive motor 71. And, it is provided at equal intervals on the second rotation axis 72 and rotates while pressing the non-woven fabric layer 41 to form second grid seating grooves 44 perpendicular to the first grid seating groove 43 in the non-woven fabric layer 41. Shiki is connected to the second pressure rollers (73), the second drive motor (71), and a stand (74) that supports the first rotation axis (62), and is connected to the stand (74) to seat the stand (74) on the first grid. It consists of a transfer cylinder 75 that transfers the material in a direction perpendicular to the groove 43 so that second grid seating grooves 44 are formed in the nonwoven fabric layer 41.

The geogrid felt manufacturing apparatus of the present invention operates as follows.

In the present invention, first grid seating grooves 43 are formed in the nonwoven fabric layer 41 while the nonwoven fabric layer 41 is transported along the conveyor and passes through the first grid seating groove processing unit 60.

When the first drive motor 61 of the first grid seating groove processing part 60 is driven, the first rotation shaft 62 rotates and the first pressure roller 63 rotates. Since the first pressure roller 63 is pressing the non-woven fabric layer 41, the first pressure roller 63 rotates while the non-woven fabric layer 41 is transported along the conveyor, forming a first grid seating groove ( 43) is formed.

A guide groove (not shown) may be formed on the outer surface of the conveyor along the longitudinal direction of the conveyor to allow a portion of the first pressure roller 63 to enter. In this case, the non-woven fabric layer 41 is transported along the conveyor and the first pressure roller 63 is moved along the conveyor. As the pressure roller 63 is rotated by the first drive motor 61, the first pressure roller 63 pushes the corresponding part of the non-woven fabric layer 41 toward the guide groove and creates a first grid seating groove in the non-woven fabric layer 41. (43) can be formed.

When the first grid seating groove 43 of a certain length is formed in the non-woven fabric layer 41 by the first grid seating groove processing unit 60, the driving of the conveyor is temporarily stopped and the transport of the non-woven fabric layer 41 is stopped.

In this state, the second grid seating groove processing unit 70 is driven to form second grid seating grooves 44 in the nonwoven fabric layer 41 on which the first grid seating grooves 43 are formed.

When the second drive motor 71 of the second grid seating groove processing part 70 is driven, the second rotation shaft 72 rotates and the second pressure roller 73 rotates accordingly. In this state, the transfer cylinder 75 is operated to transfer the second pressure roller 73 coupled to the holder 74 in a direction perpendicular to the first grid seating groove 43.

The second pressure roller 73 is positioned to press the non-woven fabric layer 41, so while the transport of the non-woven fabric layer 41 is temporarily stopped, the second pressure roller 73 rotates and is transported by the transport cylinder 75. A second grid seating groove 44 is formed in the nonwoven fabric layer 41 to be perpendicular to the first grid seating groove 43.

An auxiliary guide groove (not shown) (formed in a direction perpendicular to the guide groove on the outer surface of the conveyor) may be formed on the outer surface of the conveyor to allow a portion of the second pressure roller 73 to enter, and in this case, a non-woven fabric layer ( While 41) is stopped, the second pressure roller 73 is rotated by the second drive motor 71 and transported by the transfer cylinder 75, and the second pressure roller 73 assists the nonwoven fabric layer 41. The second grid seating groove 44 can be formed in the nonwoven fabric layer 41 by pushing it toward the guide groove.

This invention has the following advantages.

First, the coating waterproof layer 30 is made by mixing styrene-butadiene-styrene, asphalt AP, fine powder aggregate, slaked lime, fly ash, cellulose fiber, and stabilizer at a certain ratio, so the tensile performance And shear adhesion performance is improved, and the flowability of asphalt AP is improved, making the application of the coating waterproof layer 30 easier.

Second, grid-shaped grid seating grooves 42 are formed in the non-woven fabric layer 41 of the present invention, so that when the grid 46 and the non-woven fabric layer 41 are in close contact, the grid 46 is attached to the non-woven fabric layer 41. It is seated in the grid seating groove (42).

Accordingly, since the bonding force between the grid 46 and the non-woven fabric layer 41 is increased, the geogrid felt 40 is more firmly fixed to the waterproof film layer 30 and the asphalt pavement layer 50.

Third, in the present invention, a communication hole 45 is formed in a portion orthogonal to the grid seating groove 42 of the nonwoven fabric layer 41, and the intersection portion of the grid 46 is located in this communication hole 45.

Therefore, since the coating waterproof layer 30 and the asphalt pavement layer 50 flow into the intersection of the grid 46 through the communication hole 45, the coating waterproof layer 30, the geogrid felt 40, and the asphalt pavement layer 50 The bonding strength is further improved.

Fourth, in the present invention, a grid 46 is seated in the grid seating groove 42 of the non-woven fabric layer 41, and the upper surface of the grid 46 is covered with an auxiliary non-woven fabric layer 47.

Therefore, the grid 46 is accommodated in the grid seating groove 42 of the non-woven fabric layer 41 and then covered with the auxiliary non-woven fabric layer 47, and is stored between the non-woven fabric layer 41 and the auxiliary non-woven fabric layer 47. It is provided with, and in this state, the geogrid felt (40) is pressed between the waterproof film layer (30) and the asphalt pavement layer (50). Accordingly, since the grid 46 is fixed in the form of being inserted into the nonwoven fabric layer 41 and the auxiliary nonwoven fabric layer 47, the bonding force between the nonwoven fabric layer 41 and the grid 46 is further increased.

Meanwhile, an application layer may be formed on the first pressure roller 63 and the second pressure roller 73 to improve weather resistance and wear resistance.

The coating materials for this coating layer include 32% by weight of tetraglycidyl diamino diphenyl methane, 20% by weight of propanolamine, 10% by weight of hafnium, 15% by weight of organic acid magnesium, 8% by weight of titanium oxide (TiO2), and aluminum oxide (AIO2). ) It consists of 10% by weight and 5% by weight of solvent, and the coating thickness can be 9㎛.

Tetraglycidyl diamino diphenyl methane and propanolamine play a role in corrosion prevention, weather resistance, and discoloration prevention, and hafnium is a transition metal element with wear resistance and weather resistance, and plays a role in having excellent water resistance and corrosion resistance.

Organic acid magnesium plays a role in providing alkali resistance and sliding properties to the surface of the coating film, and titanium oxide and aluminum oxide are added for fire resistance and chemical stability.

The reason for limiting the ratio of the components and the coating thickness as above is that the present inventor analyzed the test results after repeated failures and found that the ratio showed the optimal weather resistance and abrasion resistance improvement effect.

Additionally, a stain-resistant coating layer made of an anti-fouling coating composition may be applied to the first and second rotating shafts 62 and 72 to improve stain resistance.

The composition of the stain-resistant coating layer contains sodium sulfate and alkyl ethoxylate ether in a molar ratio of 1:0.01 to 1:2, and the total content of sodium sulfate and alkyl ethoxylate ether is 1 to 12 weight based on the total aqueous solution. %am.

The molar ratio of the sodium sulfate and the alkyl ethoxylate ether is preferably 1:0.01 to 1:2. If the molar ratio is outside the above range, the applicability of the first and second rotary shafts 62 and 72 may be reduced or After application, there is a problem in that moisture adsorption on the surface increases and the coating film is removed.

The sodium sulfate and alkyl ethoxylate ether are preferably contained in an amount of 1 to 12% by weight in the total composition aqueous solution. If the content is less than 1% by weight, there is a problem in that the applicability of the first and second rotating shafts 62 and 72 is reduced. , if it exceeds 12% by weight, crystal precipitation is likely to occur due to an increase in the thickness of the coating film.

Meanwhile, it is preferable to apply the composition of the stain-resistant coating layer of the present invention to the first rotation axis 62 and the second rotation axis 72 by spraying. In addition, the final coating film thickness of the first rotation axis 62 and the second rotation axis 72 is preferably 900 to 2300 Å. If the thickness of the coating film is less than 900 Å, there is a problem of deterioration in the case of high temperature heat treatment, and if it exceeds 2300 Å, there is a disadvantage that crystal precipitation on the coating surface is likely to occur.

Additionally, the composition of the stain-resistant coating layer of the present invention can be prepared by adding 0.1 mole of sodium sulfate and 0.05 mole of alkyl ethoxylate ether to 1000 ml of distilled water and then stirring.

The reason for limiting the ratio of the components and the thickness of the coating film to the above values is that the present inventor analyzed the test results after repeated failures and found that the ratio showed the optimal anti-contamination application effect.

In addition, a heat dissipation coating agent is applied to the outer case of the first drive motor 61 and the outer case of the second drive motor 71 to prevent heat emitted from the first drive motor 61 and the second drive motor 71. It was made to be released effectively to the outside.

The composition of this heat dissipation coating is 12% by weight of butyl cellosolve, 43% by weight of methyltrimethoxysilane, 8% by weight of chromium oxide, 11% by weight of graphite, 7% by weight of silicon nitride, 5% by weight of sodium hydroxide (NaOH), oxidation It consists of 4% by weight titanium, 3% by weight fumed silica, and 7% by weight 3-mercaptopropyl trimethoxysilane.

Butyl cellosolve plays a role in protecting the heat dissipation coating layer, methyltrimethoxysilane acts as a binder resin, chromium oxide acts as wear resistance, graphite has excellent thermal conductivity and electrical properties, and silicon nitride improves strength and It prevents cracking, sodium hydroxide acts as a dispersant, titanium oxide serves for weather resistance, fumed silica acts as an anti-settling agent, and 3-mercaptopropyl trimethoxysilane acts as an adhesion enhancer.

It is preferable that the heat dissipation thickness is 8 to 1500㎛.

The reason for limiting the constituent materials and components and limiting the mixing ratio as described above is that the present inventor analyzed the test results after repeated failures and found that the optimal effect was achieved with the above-mentioned constituents and numerical ratio. indicated.

Additionally, an adhesion enhancer may be applied to the upper surface of the concrete structure 10 to improve applicability with the primer 20.

This adhesion improver may include 68 parts by weight of water, 10 parts by weight of styrene, 15 parts by weight of sodium alkylaryl sulfonate, 4 parts by weight of ammonium persulfate, and 3 parts by weight of sodium bicarbonate.

Styrene is added for adhesion and adhesion, sodium alkylarylsulfonate acts as a surfactant, ammonium persulfate acts as a catalyst, and sodium bicarbonate acts as a buffer.

The reason for limiting the constituent materials and components and limiting the mixing ratio as described above is that the present inventor analyzed the test results after repeated failures and found that the optimal effect was achieved with the above-mentioned constituents and numerical ratio. indicated.

Meanwhile, the first pressure roller 63 and the second pressure roller 73 may be made of rubber, and the raw material content ratio of the first pressure roller 63 and the second pressure roller 73 is 68% by weight of rubber. %, 9% by weight of trimethylthiourea, 8% by weight of aromatic oil, 9% by weight of carbon black, and 6% by weight of 3C (N-PHENYL-N'-ISOPROPYL- P-PHENYLENEDIAMINE).

Trimethylthiourea is added to accelerate vulcanization, aromatic oil is added to act as a softener, carbon black is added to increase or improve wear resistance and thermal conductivity, and 3C (N-PHENYL-N'- ISOPROPYL-P-PHENYLENEDIAMINE) is added as an antioxidant,

Therefore, the present invention improves durability by increasing the elasticity, toughness, and rigidity of the first pressure roller 63 and the second pressure roller 73, and accordingly, the first pressure roller 63 and the second pressure roller 73 The lifespan of is increased.

The tensile strength of the rubber material is 150Kg/㎠ and the elongation is 620%.

The reason for limiting the rubber material and components and limiting the mixing ratio values, etc. is that the present inventor analyzed the test results after repeated failures and found that the optimal effect was achieved with the above-mentioned components and numerical ratios. indicated.

10: Concrete structure 20: Primer
30: Film waterproofing layer 40: Geogrid felt
41: non-woven layer 42: grid seating groove
43: 1st grid seating groove 44: 2nd grid seating groove
45: communication hole 46: grid
47: Auxiliary non-woven layer 50: Asphalt pavement layer
60: First grid seating groove processing part 61: First driving motor
62: first rotation axis 63: first pressure roller
70: Second grid seating groove processing part 71: Second motor
72: second rotation shaft 73: second pressure roller
74: Holder 75: Transfer cylinder

Claims (4)

A primer (20) applied on the concrete structure (10) obtained by cutting and cleaning the aged bridge surface, a coating waterproof layer (30) applied on the primer (20), a geogrid felt (40) spread on the coating waterproof layer (30), and a geogrid. In the bridge waterproofing structure consisting of an asphalt pavement layer (50) laid on felt (40),
The coating waterproof layer 30 is,
15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, 4 to 10% by weight of one of fine powder aggregate, slaked lime, and fry ash, and 0.1 to 2% by weight of cellulose fiber, Consists of 0.001 to 1% by weight of stabilizer;
Geogrid felt (40),
A grid 46 in which two or more lines made by twisting a plurality of glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and a mesh-shaped non-woven fabric layer attached to one surface of the grid 46 by heat compression. It consists of (41),
In the nonwoven layer 41,
Grid-shaped grid seating grooves 42 are formed, so that when the grid 46 and the non-woven fabric layer 41 come into close contact, the grid 46 is seated in the grid seating grooves 42 of the non-woven fabric layer 41;
A communication hole 45 is formed in the orthogonal portion of the grid seating groove 42 of the non-woven fabric layer 41, and the intersection part of the grid 46 is located in the communication hole 45, so that the coating waterproof layer 30 and the asphalt Since the pavement layer 50 flows into the intersection of the grid 46 through the communication hole 45, the bonding strength of the coating waterproof layer 30, the geogrid felt 40, and the asphalt pavement layer 50 is improved. Bridge waterproofing structure using geogrid felt.
delete A primer (20) applied on the concrete structure (10) obtained by cutting and cleaning the aged bridge surface, a coating waterproof layer (30) applied on the primer (20), a geogrid felt (40) spread on the coating waterproof layer (30), and a geogrid. In the bridge waterproofing structure consisting of an asphalt pavement layer (50) laid on felt (40),
The coating waterproof layer 30 is,
15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, 4 to 10% by weight of one of fine powder aggregate, slaked lime, and fry ash, and 0.1 to 2% by weight of cellulose fiber, Consists of 0.001 to 1% by weight of stabilizer;
Geogrid felt (40),
A grid 46 in which two or more lines made by twisting a plurality of glass fiber warp threads are arranged in a grid-like structure in the horizontal and vertical directions, and a mesh-shaped non-woven fabric layer attached to one surface of the grid 46 by heat compression. It consists of (41),
In the nonwoven layer 41,
Grid-shaped grid seating grooves 42 are formed, so that when the grid 46 and the non-woven fabric layer 41 come into close contact, the grid 46 is seated in the grid seating grooves 42 of the non-woven fabric layer 41;
A grid 46 is seated in the grid seating groove 42 of the non-woven fabric layer 41, and the upper surface of the grid 46 is covered with an auxiliary non-woven fabric layer 47, so that the grid 46 is a non-woven fabric layer. A geogrid felt characterized in that it is stored in the grid seating groove 42 of (41) and then covered with the auxiliary non-woven fabric layer 47, and stored between the non-woven fabric layer 41 and the auxiliary non-woven fabric layer 47. Bridge waterproofing structure using .
A primer (20) applied on the concrete structure (10) obtained by cutting and cleaning the aged bridge surface, a coating waterproof layer (30) applied on the primer (20), a geogrid felt (40) spread on the coating waterproof layer (30), and a geogrid. In the bridge waterproofing structure consisting of the asphalt pavement layer (50) laid on the felt (40), the coating waterproof layer (30) contains 15 to 20% by weight of styrene-butadiene-styrene, 70 to 80% by weight of asphalt AP, and , consisting of 4 to 10% by weight of one of fine powder aggregate, slaked lime, and fry ash, 0.1 to 2% by weight of cellulose fiber, and 0.001 to 1% by weight of a stabilizer; The geogrid felt (40) is made by twisting a plurality of glass fiber warp yarns into a grid (46) in which two or more lines are arranged in a grid-like structure in the horizontal and vertical directions, and heat-pressed on one surface of the grid (46). It is made of a non-woven fabric layer 41 in the form of a mesh attached, and a grid-shaped grid seating groove 42 is formed in the non-woven fabric layer 41, so that when the grid 46 and the non-woven fabric layer 41 are in close contact with the grid ( In the device for manufacturing a geogrid felt (40) with a bridge waterproof structure in which 46) is seated in the grid seating groove (42) of the non-woven fabric layer (41),
A first grid seating groove processing unit 60 that forms a plurality of first grid seating grooves 43 at equal intervals in the nonwoven fabric layer 41 that is seated on the conveyor and transported along the conveyor;
A second grid seating groove processing unit 70 is provided on one side of the first grid seating groove processing unit 60 and forms a second grid seating groove 44 so as to be perpendicular to the first grid seating groove 43 in the nonwoven fabric layer 41. ) and includes;
The first grid seating groove processing unit 60,
A first driving motor 61, a first rotating shaft 62 connected to the axis of the first driving motor 61 and rotated by the first driving motor 61, and at equal intervals on the first rotating shaft 62. It consists of first pressure rollers (63) that are provided and rotated while pressing the non-woven fabric layer (41) to form a first grid seating groove (43) when the non-woven fabric layer (41) is transported along the conveyor;
The second grid seating groove processing unit (70),
A second drive motor 71, a second rotation axis 72 connected to the axis of the second drive motor 71 and rotated by the second drive motor 71, and at equal intervals on the second rotation axis 72. second pressure rollers 73 that are provided and rotated while pressing the non-woven fabric layer 41 to form second grid seating grooves 44 perpendicular to the first grid seating groove 43 in the non-woven fabric layer 41; 2. The driving motor 71, a holder 74 supporting the first rotation axis 62, and the holder 74 are connected to the holder 74 to transport the holder 74 in a direction perpendicular to the first grid seating groove 43 to form a non-woven fabric. A geogrid felt manufacturing device, characterized in that it consists of a transfer cylinder (75) that causes second grid seating grooves (44) to be formed in the layer (41).

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