KR102606095B1 - Composite waterproofing structure for bridge decks and the construction method thereof - Google Patents

Abstract

The present invention is a modified asphalt-based waterproofing coating layer (10) mixed with an anionic fine filler (11) therein,
A fiber filter member in which charged fluff (21) is formed on the lower surface and the fluff (21) is electrostatically attached to the anionic fine filler (11) of the waterproof coating layer (10) and combined with the waterproof coating layer (10). (20), an invention relating to a bridge composite waterproof structure and its construction method, characterized in that an asphalt mixture (30) is laid on top of the fiber filter member (20).

Description

Composite waterproofing structure for bridge decks and the construction method thereof using fiber filters {Composite waterproofing structure for bridge decks and the construction method thereof}

The present invention is a bridge composite waterproof structure and construction method that improves adhesion and watertight performance and improves durability and usability of roads and structures by using the electrical attraction of a waterproof coating layer mixed with anionic microfiller and a charged fiber filter member. It's about.

Bridge decks made of cement concrete or steel deteriorate when exposed to moisture or chemical components such as calcium chloride, deteriorating structural performance. Accordingly, a waterproof layer is installed on the bridge deck to prevent deterioration and ensure the durability of the structure.

Types of waterproofing layers that protect bridge decks include the heated bridge waterproofing method, which involves heating asphalt-based waterproofing materials, the sheet-type bridge waterproofing method, which attaches a sheet with waterproof performance, and the application of synthetic rubber, etc. in an organic solvent at room temperature. There are room temperature type bridge waterproofing methods, and resin-based bridge waterproofing methods using epoxy or urethane-based reactive resins.

Among these, the sheet-type bridge waterproofing method, room temperature type bridge waterproofing method, and resin-based bridge waterproofing method have the advantage of not requiring a heating process, but they cause fracture of the joint between sheets, lack of compatibility with the upper asphalt concrete layer, use of large amounts of organic solvents, bad smell, and Due to disadvantages such as the need for a long curing time, the heated bridge waterproofing method is mainly used.

The heated bridge waterproofing method has the advantage of enabling construction without joints because the waterproofing material is heated and applied on site. However, if the floor plate has irregularities, it is difficult to form a uniform waterproofing layer, and the sheet-type bridge waterproofing method is generally used. Compared to this, the tensile performance of the waterproof layer is poor.

If the waterproofing material is applied thinly during the construction of heated bridge waterproofing material, it will lead to a decrease in waterproofing performance. In order to solve such construction problems, Patent No. 10-2382624, which was presented as prior art, proposes a composite waterproofing method in which a heated bridge waterproofing material is applied and then a waterproofing sheet finished by attaching silica sand or aluminum oxide to both sides is additionally laid. there is. This method has the advantage of securing the overall thickness of the waterproofing layer, but if heat transfer is insufficient at the joint of the sheet or on the surface of the silica sand that is not coated with asphalt, it may cause desorption, and air bubbles may form between the heated coating and the waterproofing sheet during the construction process. There is a problem in that the adhesive strength is not developed when it is trapped and cannot escape.

When repairing an asphalt pavement by overlaying it, there is a technology to strengthen adhesion by using fluffed fiber members. In Patent No. 10-2407794, a technology is introduced to form fluff on the bottom surface of a geosynthetic member using a fluff forming roller, and to allow the road adhesive to be absorbed into the upper geosynthetic member along the fluff by capillary action. there is. The road adhesive used here is in the form of a low-viscosity liquid with a viscosity of 1-6, and is made by using emulsified asphalt mixed with straight asphalt binder with an emulsifier and water to lower the viscosity and provide flowability. Emulsified asphalt mixed with water in an asphalt binder has flowability at room temperature, whereas straight asphalt binder or modified asphalt binder has a high viscosity at room temperature and has a shape close to a solid, so when forming a road adhesive or waterproof layer film, the fluff interface and asphalt are used. Since the cohesion between binders is not greater than the internal cohesion of the asphalt binder, capillary action is not possible, so the fluff function is lost.

No. 10-2407794 No. 10-2382624 No. 10-0941747

The present invention,

When the asphalt mixture (30) heated to a high temperature is overlaid on the upper part of the waterproof structure and compaction pressure is applied to consolidate the fiber filter member (20) on which the charged fluff (21) is formed, the fluff of the fiber filter member (20) is formed in the waterproof coating layer. By electrostatically bonding with the fine filler (11) of (10), it is tangled in an attached state to form a waterproof layer with strengthened internal binding force.

The modified asphalt-based waterproofing coating material through which the fine filler (11) has been filtered is absorbed and impregnated into the fiber filter member and formed into a sheet in the form of a mat, and the excess of the modified asphalt-based waterproofing coating material impregnated in the fiber filter is present in the lower part of the asphalt mixture (30). By penetrating and filling a certain amount of voids, additional adhesion and watertightness are provided up to a certain height below the asphalt mixture (30) layer, thereby blocking rainwater and chemical components from penetrating into the bridge deck, thereby maintaining and increasing the durability of bridge and road structures. The purpose is to enable you to do this.

The present invention,

A modified asphalt-based waterproofing coating layer (10) containing an anionic fine filler (11) mixed inside, charged fluff (21) is formed on the lower surface, and the fluff (21) is an anionic fine filler ( 11) and a fiber filter member (20) electrostatically attached to the waterproof coating layer (10), and an asphalt mixture (30) is laid on top of the fiber filter member (20).

In addition, the modified asphalt,

It is characterized by being composed of 70-90% by weight of straight asphalt, 7-20% by weight of synthetic rubber, and 3-10% by weight of tackifier.

The waterproof coating layer 10 is characterized by being composed of 80 to 95% by weight of modified asphalt and 5 to 20% by weight of filler.

And the anionic microfiller 11 includes oxide ions (O ^2- ), sulfide ions (S ^2- ), sulfate ions (SO ₄ ^2- ), halogenated minerals, carbonates (CO ₃ ^2- ), and phosphates (PO ₄ ^3- ), silicate (SiO ₄ ^4- ), and is a natural or artificial aggregate composed of a material with a particle size of 2 to 1,000㎛, specific gravity of 0.9 to 3.5 and a melting point of 200℃ or higher, or a combination of natural and artificial aggregate. Characterized by being a mixture,

The fluff 21 formed on the lower surface of the fiber filter member 20 is,

It is characterized in that it is obtained by continuously passing the fiber filter member (20) through the interior of the fluff forming device (40) consisting of an upper frame (41) and a lower frame (42) whose height is adjustable.

In addition, the upper and lower frames 41 and 42 of the fluff forming device 40 are made of an alloy steel material containing one or more of lead, nickel, iridium, and cobalt, and the inner surface of the upper frame 41 is made of wax. It is coated to provide lubrication, and the inner surface of the lower frame (42) is composed of a brush shape with continuously formed pins with a height of 0.2 to 0.5 mm, and the fluff (21) is charged by friction on the lower surface of the fiber filter member (20). ) is characterized by forming.

As a construction method, the present invention,

Steps of preparing the surface of the bridge deck to install a waterproof layer, forming a waterproof coating layer by applying a heated modified asphalt-based waterproofing coating material containing fine filler (11), forming charged fluff (21) on the lower surface. It is characterized in that it consists of the step of laying the fiber filter member (20) on the upper surface of the coating waterproof layer, and the step of compacting the fiber filter member (20) by overlaying and compacting the asphalt mixture (30) heated to a high temperature of 150 to 200 degrees. do.

The present invention,

The charged fluff of the fiber filter member is tangled in an attached state by electrostatically bonding with the fine filler of the waterproof coating layer, which has the effect of forming a waterproof layer with strengthened internal binding force.

The modified asphalt-based waterproofing coating material with fine filler filtered inside the fiber filter member is absorbed and impregnated to form a sheet in the form of a mat.

The excess of the waterproof coating material penetrates and fills the voids that exist at the bottom of the asphalt mixture layer, thereby providing additional adhesion and watertight performance up to a certain height below the asphalt mixture layer, blocking rainwater and chemical components from penetrating into the bridge deck and bridges and roads. It has the effect of maintaining and increasing the durability of the structure.

It has the effect of forming a waterproof composition that integrates an asphalt-based waterproofing coating layer in which fine filler is entangled with fluff, a fiber filter member impregnated with the asphalt-based coating to form a waterproof sheet, and an asphalt mixture layer strengthened by the asphalt-based coating penetrating into the pores.

Figure 1 is a stacked cross-sectional view of the components applied to the bridge waterproofing structure of the present invention.
Figure 2 is a schematic diagram of the fluff formed on the lower surface of the fiber filter member of the present invention
Figure 3 is a cross-sectional view of a waterproof coating layer mixed with the fine filler of the present invention.
Figure 4 is a cross-sectional view of the stack during roller compaction in the present invention.
Figure 5 is a perspective view of a fiber filter member being supplied to the fluff forming device of the present invention.
Figure 6 is a schematic diagram of the upper and lower frames of the fluff forming device of the present invention
Figure 7 shows the fiber filter member passing through the fluff forming device of the present invention and the charged fluff being bonded to the fine filler by electrical properties.
Figure 8 is a schematic diagram of the installation of the fluff forming device of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail as follows. Also, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

■ Modified asphalt-based waterproofing coating layer (10)

The modified asphalt used in the waterproof coating layer 10 of the present invention consists of 70 to 90% by weight of straight asphalt, 7 to 20% by weight of synthetic rubber, and 3 to 10% by weight of a tackifier. In order to further improve the performance of the waterproofing film, if necessary, adjust some of the above ingredient contents and add 2-7% by weight of viscosity regulator, 0.1-2% by weight of anti-stripping agent, 0.1-0.5% by weight of cross-linker, 0.05-0.2% by weight of anti-foaming agent, and antioxidant. An additional 0.05 to 0.2% by weight can be used.

The straight asphalt is preferably an AP-3 or AP-5 grade as the base material for the waterproofing film. If it is less than 70% by weight, economic efficiency decreases as the amount of other materials used increases, and if it exceeds 90% by weight, it must be modified. If the degree is insufficient, the performance of the waterproof coating layer 10 deteriorates.

The synthetic rubber contained in the modified asphalt of the present invention is an important component of the present invention. Synthetic rubber is a material that improves the plastic deformation resistance at high temperatures and the brittle fracture resistance at low temperatures of modified asphalt. It includes SBS (styrene-butadiene-styrene), SBR (styrene-butadiene-rubber), and SIS (styrene-isoprene- Contains one or more of styrene-based synthetic rubber including styrene, polychloroprene rubber, nitrile rubber (acrylonitrile-butadiene rubber), isoprene-isobutylene rubber, and acrylic rubber, If the content is less than 7% by weight, the effect of modifying asphalt is minimal, and if it exceeds 20% by weight, the viscosity of the modified asphalt increases excessively, reducing compatibility with asphalt concrete.

The synthetic rubber improves fracture resistance at high and low temperatures, but has the property of reducing the viscous behavior area of asphalt, which exhibits viscoelastic behavior. In the present invention, 7 to 20% by weight of synthetic rubber is added to increase plastic deformation resistance and brittle fracture resistance, and has a high viscosity. Therefore, even if the fluff 21 is formed on the fiber filter member 20, the phenomenon of the modified asphalt being sucked upward along the formed fluff 21 does not occur. In the present invention, when laying and compacting the asphalt mixture (30), the waterproof coating layer (10) material moves upward and is incorporated through the holes of the fiber filter member (20).

■ Waterproofing film layer (10) containing anionic microfiller (11)

The waterproof coating layer (10) of the present invention contains 80 to 95% by weight of modified asphalt and 5 to 20% by weight of filler, and is a waterproofing layer and asphalt mixture (30) layer that blocks rainwater and chemical components from penetrating into bridge and road structures. It acts as an adhesive between the lower part and the waterproof coating layer 10, and the fine filler 11 reinforces the fiber filter member 20 to form a waterproof layer with improved durability.

An anionic fine filler (11) is mixed inside the waterproof coating layer (10).

Specifically, the microfiller 11 includes oxide ions (O ^2- ), sulfide ions (S ^2- ), sulfate ions (SO ₄ ^2- ), halogenated minerals, carbonates (CO ₃ ^2- ), and phosphates (PO ₄ ^3- ), silicate (SiO ₄ ^4- ), is a natural aggregate or artificial aggregate composed of a material containing at least one of silicates (SiO 4 4- ), has negative ions, has a particle size of 2 to 1,000 ㎛, and has a specific gravity of 0.9 to 3.5 and a melting point of 200°C or higher, or is a natural aggregate. It is characterized by being a mixture of and artificial aggregate.

If the particle diameter of the fine filler 11 is less than 2㎛, the fine filler 11 does not come into contact with the charged fluff 21, so it is difficult to improve the tensile performance of the waterproof structure by passing through the pores of the fiber filter, and if it exceeds 1,000㎛, it is difficult to improve the tensile performance of the waterproof structure. In this case, it is difficult to express the electrical properties generated from the fluff 21 charged by the weight of the single particle of the fine filler 11. It is preferable that the fine filler 11 have a particle diameter of 100 μm or less and that the content is 20% or less of the total volume of the filler. In addition, if the specific gravity of the filler is less than 0.9, the filler floats when the waterproofing film is heated, making it difficult to form a homogeneous waterproofing layer, and if it exceeds 3.5, the unit weight of the waterproofing film increases and constructability deteriorates.

■ Fiber filter member (20) in which charged buff is formed on the lower surface

The fiber filter member 20 of the present invention contains one or more of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), and Teflon, and is needle punched and spunbond. , diameter of filament (1 fiber strand) bonded through spunlace, meltblown, and stitch bond processes 16~38㎛, pore area per ^1m2 of fiber filter member (20) 0.05~ ^0.2m2 , thickness 0.5~3.0mm , It is composed of a non-woven fabric with physical properties of 20~60% elongation and penetration force of 500~3,000N.

The fluff 21 of 5 to 10 mm is formed at the bottom of the fiber filter member 20 of the present invention, and the specific surface area of the outer surface of the formed fluff 21 is 50,000 to 300,000 mm ² per 1 m ² of the fiber filter member 20. do. Here, if the diameter of the filament is less than 16㎛, economic feasibility decreases due to an increase in manufacturing cost, and if it exceeds 38㎛, the strength of the fiber filter member 20 is reduced due to insufficient interweaving between filament fibers.

In the present invention, the material of the waterproof coating layer (10) moves upward through the pores of the fiber filter member (20) and is incorporated into the upper asphalt mixture (30) layer. At this time, if the pore area is less than 0.05m ² , the penetration of the modified asphalt is not smooth, and if it exceeds 0.2m ² , the texture is insufficient and wrinkles occur during construction, making it difficult to ensure uniformity in the joint width. In addition, if the penetration force is less than 500N, partial damage occurs due to construction wheels, making it difficult to secure a homogeneous waterproof layer, and if it exceeds 3,000N, it is uneconomical.

In the present invention, the fluff 21 formed on the lower surface of the fiber filter member 20 is formed for electrostatic adhesion with the fine filler 11 incorporated in the waterproof coating layer 10. If the length of the fluff 21 is less than 5 mm, it is difficult to achieve performance due to insufficient entanglement with the fine filler 11, and if it exceeds 10 mm, the bonding strength of the fiber filter member 20 is reduced. In addition, if the specific surface area of the outer surface of the fluff 21 is less than 50,000 mm ² , the electrical properties of the fluff 21 are insufficient, and if it exceeds 300,000 mm ² , the friction force required to form the fluff 21 is excessive, which reduces constructability.

■ Fluff forming device (40)

In the present invention, the fluff 21 formed on the lower surface of the fiber filter member 20 is a fiber filter inside the fluff forming device 40 consisting of an upper frame 41 and a lower frame 42 whose height is adjustable. It is characterized by being obtained by continuously passing the member 20.

In addition, the upper and lower frames 41 and 42 of the fluff forming device 40 are made of an alloy steel material containing one or more of lead, nickel, iridium, and cobalt, and the inner surface of the upper frame 41 is made of wax. It is coated to provide lubrication, and the inner surface of the lower frame (42) is composed of a brush shape with continuously formed pins with a height of 0.2 to 0.5 mm, and the fluff (21) is charged by friction on the lower surface of the fiber filter member (20). ) is characterized by forming.

As shown in FIG. 6, the fluff forming device 40 connects the upper frame 41 and the lower frame 42 with a height-adjustable bolt portion 43, and the inner surface of the upper frame 41 is coated with wax. It is coated to provide lubricity, and the inner surface of the lower frame 42 is composed of a brush shape with continuously formed pins with a height of 0.2 to 0.5 mm, providing a frictional force of 100 to 300 N/m on the lower surface of the fiber filter member 20. This generates charged fluff (21).

Figure 7 shows the fiber filter member 20 passing through the fluff forming device 40 of the present invention and the charged fluff being adhered to the fine filler 11 by electrical properties. As shown in Figure 7, the inner surface of the upper frame 41 is coated with any one of LDPE wax, LLDPE wax, low-polymer wax, and paraffin wax, and the coated wax is applied to the inner surface of the upper frame 41. By lubricating the upper surface of the fiber filter member 20, when the fiber filter member 20 passes through the fluff forming device 40, the friction of the upper surface of the fiber filter member 20 causes the fiber filter member 20 to The moving speed is prevented from changing, and as a result, the fluff 21 formed on the lower surface of the fiber filter member 20 has a predetermined length and external surface area to realize electrostatic bonding with the fine filler 11 of the waterproof coating layer 10. Make it possible to provide.

Figure 8 is a schematic diagram of the installation of the fluff forming device 40 of the present invention. The height of the bolt portion 43 of the fluff forming device can be adjusted to generate the necessary friction force according to field conditions and specifications of the fiber filter member 20. Here, if the friction force is less than 100 N/m, the fluff 21 is not sufficiently charged, and if it exceeds 300 N/m, the installation speed of the fiber filter member 20 is slowed, thereby deteriorating constructability. It is preferable that the guide installed in the direction in which the fiber filter member 20 is unwound guides the upper surface of the fiber filter member 20 in contact with the fiber filter member 20 to prevent the formed buffle from being deformed.

■ Construction method

The construction method of the present invention is,

Steps of preparing the surface of the bridge deck to install a waterproof layer, forming a waterproof coating layer by applying a heated modified asphalt-based waterproofing coating material containing fine filler (11), forming charged fluff (21) on the lower surface. It consists of laying the fiber filter member (20) on the upper surface of the coating waterproof layer, overlaying and compacting the asphalt mixture (30) heated to a high temperature of 150 to 200 degrees, and consolidating the fiber filter member (20).

Here, depending on the work site and situation, a step of preparing the surface of the bridge deck may be followed by an additional step of applying a primer.

In the step of forming the waterproof coating layer 10 by applying the heated modified asphalt-based waterproof coating material containing the fine filler 11, the waterproof coating layer is applied to a thickness of 2 to 5 mm. And in the step of laying the fiber filter member 20, the joint surface between the fiber filter member 20 and the fiber filter member 20 is joined to 5 to 20 cm for construction. In the step of consolidating the fiber filter member 20 in which the fluff is formed, the upper part of the asphalt mixture 30 heated to a high temperature overlaid on the top of the waterproof structure is pressed at a pressure of 0.3 to 0.8 MPa using a combination of two or more of macadam rollers, tandem rollers, and tire rollers. Apply pressure 10 to 15 times for 0.5 to 1.0 seconds. As a result, the modified asphalt-based waterproof coating material of the waterproof coating layer 10 located at the bottom of the fiber filter member 20 is impregnated toward the upper side through the pores of the fiber filter member 20, and the fine filler 11 is electrically and physically fluffed ( 21) and then tangled to form a waterproof layer with improved tensile performance. Subsequently, the excess of the modified asphalt-based waterproofing coating material impregnated in the fiber filter member 20 penetrates and fills a certain pore in the lower surface area of the asphalt mixture 30 layer, thereby forming an adhesive layer to a certain height.

(Example 1)

A modified asphalt-based waterproofing coating material containing fine filler (11) was prepared by mixing 90% by weight of modified asphalt and 10% by weight of filler, and the composition and physical properties of each material are shown in the table below.

straight asphalt
(AP-3) synthetic rubber
(SBS) Tackifier
(C9) Anti-stripping agent silicone defoamer Sum ratio
(weight%) 79.3 15 4.5 1.1 0.1 100 Micro filler (11) types aluminum silicate Particle size (㎛) 200~600 importance 2.53

The prepared waterproof coating material was melted by heating at a temperature of 165°C for 4 hours and then uniformly applied in an amount of 3.2 kg/m ² to the bridge deck to form a coating film.

The fiber filter member 20 was laminated by applying a frictional force of 230 N/m to the bottom surface to form charged fluff 21 and then 5cm layered on the upper part of the coating film formed on the bridge deck. The specifications of the fiber filter are listed in the table below. It's the same.

item specification Filament diameter (㎛) 16 Total pore area per ^1m2 of fiber filter (m2) 0.12 Thickness (mm) 1.3 Elongation at break (%)
(ASTM D 4632) 57 Penetration power (N)
(ISO 12236) 1539

After laying the asphalt mixture (30) at 155°C on the upper part of the fiber filter member (20), macadam roller (compaction pressure: 0.7 MPa), tire roller (compaction pressure: 0.55 MPa), tandem roller (compaction pressure: 0.45 MPa) MPa) was passed sequentially 4, 5, and 4 times, respectively, to pressurize the waterproof layer, and the fine filler (11) and fluff (21) were tangled to form a waterproof layer with strengthened internal binding force, and the fiber filter member (20) The excess of the impregnated modified asphalt-based waterproofing coating material penetrated up to 4 mm below the surface layer of the asphalt mixture (30) to form an adhesive layer.

As a result of measuring the tensile strength, water resistance, tensile bond strength, and shear bond strength of the waterproof structure formed through the above process, it was confirmed that the performance exceeded the standard as shown in the following table.

Test Items standard unit standard Test result Tensile strength (23℃) KS F 4931 N/ ^mm2 4.0 6.2 Permeability resistance - won't be pitched not pitched Tensile adhesive strength (23℃) N/ ^mm2 0.6 1.3 Shear bond strength (23℃) N/ ^mm2 0,15 0.31

(Example 2) Example of fluff 21 and charge forming device

A nickel alloy steel panel whose lower section is coated with paraffin wax is placed on the upper section, and a nickel alloy steel panel with 0.3 mm pins attached to the upper section in the form of a brush is placed at the lower section, overlapped with a gap of 0.9 mm, and then fixed. A fluff 21 and a charge forming device were constructed.

A 1.3mm-thick fiber filter member (20) made of polyethylene terephthalate with filaments with a diameter of 16㎛ intertwined was passed through a 0.9mm-wide fluff (21) and a charge forming device, and a friction force of 230N/m was generated when unwinding. It has been done.

The lower surface of the fiber filter member 20 that has passed through the fluff forming device 40 has a fluff 21 having a length of 8.3 mm and an outer specific surface area of 250,000 mm ² per 1 m ² of the fiber filter member 20. was formed.

The charging state of the fluff 21 was confirmed by measuring the static electricity of the formed fluff 21, and the charging state was confirmed as having a deviation of 1.83kV as shown in the table below compared to before inputting the fluff 21 and the charge forming device. did.

Before passing the device After passing the device Amount of static electricity generated (kV) 0.05 1.88

When installing the fiber filter member 20 at a construction site, the bottom surface of the fiber filter is compressed between the friction protrusions of the conductive material and the soft non-friction (paraffin, etc.) coated surface by 30% to 70% of the thickness of the fiber filter member 20. When friction is applied (friction force: 100 to 300 N/m), charged fluff 21 is formed due to the movement of electric charges. The compression conditions are limited to the length and charge amount of the fluff 21 and the range to minimize the strength loss of the fiber filter.

The waterproof coating layer of the present invention is a mixture of an anionic fine filler (11) and an asphalt-based waterproof coating material, and the fiber filter member (20) on which the charged fluff (21) is formed has pores smaller than the fine filler (11). It is a fibrous member with an irregularly distributed structure.

In the present invention, when the fiber filter member 20 is compacted under high temperature and high pressure, electrostatic entanglement occurs between the charged fluff 21 and the anionic fine filler 11, and only the asphalt-based coating film component passes through. In the lower part of the fiber filter member 20, a waterproof coating layer 10 with high tensile strength is formed due to the filler entangled with the fluff 21.

In addition, when the fiber filter member 20 with the fine filler 11 filtered is impregnated with an asphalt-based coating film and hardened as the temperature decreases, it becomes a waterproof sheet, and the excess asphalt coating film remaining after impregnating the fiber filter member 20 is made of fiber. It penetrates into the pores of the lower surface of the asphalt mixture (30) layer constructed on the upper part of the filter, water-tightens the mixture layer, and provides adhesion, ultimately creating an asphalt-based waterproof coating layer (10) in which the fine filler (11) is entangled with the fluff (21), A waterproof composition is formed in which the fiber filter member 20, which is impregnated with the asphalt-based coating film and becomes a waterproof sheet, and the asphalt mixture layer 30, which is reinforced by the asphalt-based coating film penetrating into the pores, are integrated.

10: waterproof coating layer 11: fine filler 20: fiber filter member 21: fluff
30: Asphalt mixture 40: Fluff forming device
41: upper frame 42: lower frame 43: bolt portion

Claims (6)

A modified asphalt-based waterproofing coating layer (10) containing an anionic fine filler (11) mixed inside, charged fluff (21) is formed on the lower surface, and the fluff (21) is an anionic fine filler ( 11) and a fiber filter member (20) electrostatically attached to the waterproof coating layer (10), and an asphalt mixture (30) is laid on top of the fiber filter member (20),
The fiber filter member 20 contains one or more of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), and Teflon, and has a pore area per 1 m ² It is composed of 0.05~0.2m ² non-woven fabric,
The anionic microfiller 11 includes oxide ions (O ^2- ), sulfide ions (S ^2- ), sulfate ions (SO ₄ ^2- ), halogenated minerals, carbonates (CO ₃ ^2- ), and phosphates (PO ₄ ^{3 -} ), silicate (SiO ₄ ^4- ), and is a natural or artificial aggregate composed of a material with a particle size of 2 to 1,000㎛, specific gravity of 0.9 to 3.5 and a melting point of 200℃ or higher, or a mixture of natural and artificial aggregate. and
The fluff 21 formed on the lower surface of the fiber filter member 20 is,
It is obtained by continuously passing the fiber filter member 20 through the interior of the fluff forming device 40, which consists of an upper frame 41 and a lower frame 42 whose height is adjustable,
The inner surface of the upper frame 41 of the fluff forming device 40 is coated with wax to provide lubrication, and the inner surface of the lower frame 42 is composed of a brush shape with continuously formed pins of 0.2 to 0.5 mm in height. A bridge composite waterproof structure, characterized in that charged fluff (21) is formed on the lower surface of the fiber filter member (20) by friction.
According to paragraph 1,
The waterproof coating layer (10) is a bridge composite waterproof structure, characterized in that it consists of 80 to 95% by weight of modified asphalt and 5 to 20% by weight of filler.


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