KR20200012565A - Apparatus and method for construction waterproofing layer by low cost and highly efficient waterproofing composition using natural asphlt for bridge deck - Google Patents

Abstract

According to the present invention, disclosed are an apparatus and method for constructing a bridge deck waterproofing layer with a low-cost and high-performance coating type bridge deck waterproofing composition using natural asphalt. According to the present invention, the apparatus includes: a vehicle having a loading box on the rear side; a waterproofing material tank installed in the loading box of the vehicle, and melting a solid coating type waterproofing material into a liquefied material to store the material; a heating means melting the solid waterproofing material stored in the waterproofing material tank into a liquefied material at a predetermined temperature; a spray unit placed behind the vehicle in a width direction of a bridge, and including a plurality of nozzles installed on the lower surface at regular intervals to spray the liquefied waterproofing material to a target application surface; a conveying means the liquefied waterproofing material in the waterproofing material tank to the spray unit to enable the spray unit to spray the liquefied waterproofing material from the nozzles; and a controller installed in a driving room of the vehicle to control the operation of each of the components. According to the present invention, since a natural asphalt coating type bridge deck waterproofing composition is automatically sprayed in a direct heating manner, a coating type bridge deck waterproofing layer can be constructed quickly and conveniently with an overall constant temperature and a desired uniform thickness.

Description

Apparatus and method for construction waterproofing layer by low cost and highly efficient waterproofing composition using natural asphlt for bridge deck}

The present invention relates to a coating-type bridge waterproof layer construction device and a construction method, and more particularly, in applying a low-cost, high-performance coating-type bridge waterproof composition using natural asphalt to a concrete top plate of a bridge, a liquid sealant is applied. The present invention relates to a construction apparatus and a method for constructing a low-cost, high-performance coated membrane type waterproofing composition using natural asphalt, which can be sprayed quickly and simply and automatically using a vehicle, and can be installed at a uniform temperature and desired uniform thickness as a whole.

In general, the construction or repair method for concrete pavement or asphalt pavement paved with bridges is to install a waterproof layer on the concrete slab poured as a bridge frame, and then construct a concrete pavement layer that becomes the road surface, or asphalt It is progressing by the method of constructing a packaging layer.

However, at the bridge's bridge, crack gaps occur due to infiltration of rainwater and physical and chemical deterioration such as vehicle load, so that moisture such as rainwater penetrates into the concrete slab, and in particular, temperature rise in summer and freeze-thawing in winter. Due to the deterioration and the penetration of chloride of the snow remover is a frequent phenomenon.

This promotes reinforcing steel corrosion of the concrete slab that forms the framework of the bridge, which not only reduces the durability and life of the bridge but also adversely affects the safety of the bridge.

Therefore, bridge safety is very important for the safety of bridges, and various methods have been proposed and utilized.

Conventionally, for waterproofing such bridges, liquid waterproofing, penetration waterproofing, asphalt waterproofing, coating waterproofing have been used alone or in combination thereof.

Liquid Waterproofing and Penetration Waterproofing is a method of applying water repellent to the surface of concrete, mortar, and other mothers, or by mixing cement and mortar with water to prevent water penetration. This construction method is suitable for small areas such as buildings, but not for large structures such as bridges. Furthermore, structures that involve deformations such as bridges have poor waterproof performance because cracks easily occur in the waterproof layer.

Waterproofing of coating film is urethane rubber, acrylic rubber, acrylic resin and rubberized asphalt, and the operator applies the gel material to the base surface with roller or scraper to 2 ~ 3mm thickness. With the elasticity and elasticity of the film to form a waterproof layer has a characteristic that can obtain excellent waterproofing effect while having resistance to concrete cracks.

However, there are disadvantages in that a lot of workforce is required at a high cost and the construction work is not only complicated, but also difficult to install with a uniform thickness.

On the other hand, asphalt waterproofing is a method of stacking molten waterproof asphalt in the melting tank (about 250 ℃), but the waterproof effect is excellent, but in the process of constructing a high-temperature waterproofing agent, workers may be exposed to danger. As a result, the waterproof effect is sensitive and requires advanced work techniques.

In particular, Indonesia's natural asphalt in asphalt waterproofing is considerably cheaper than other waterproofing materials and is known to have an excellent waterproofing effect due to its stiffness and shape retention strength when cured, but natural asphalt bridge waterproofing composition is installed on the bridge as described above. There is a problem that the construction of forming a waterproof coating film at a constant temperature and thickness is not easy.

Korea Patent Registration 10-0388640 Korea Patent Registration 10-0540219 Korea Patent Registration 10-0458956 Korea Patent Registration 10-1511236

The present invention has been made to solve the above-mentioned conventional problems, in applying a coating type bridge waterproof composition using natural asphalt to the concrete top plate of the bridge, the liquid sealant is automatically sprayed using an indirect heating method The purpose of the present invention is to provide a low-cost, high-performance coating-type cross-linking waterproofing composition factory using natural asphalt which can be easily and quickly installed at a constant temperature and a desired uniform thickness.

Another object of the present invention is to provide a low-cost, high-performance coating-type crosslink waterproof composition construction method using natural asphalt using the above-mentioned cross-waterproof composition factory.

Low-cost, high-performance coating-type bridge waterproof composition using the natural asphalt according to the present invention for achieving the first object described above, the factory has a rear loading; A waterproofing tank mounted on a loading box of the vehicle and storing the solid coating waterproofing material in a liquid state; Heating means for melting the solid coating waterproofing material contained in the waterproofing material tank into a liquid at a predetermined temperature; A spray unit disposed in the width direction of the bridge at the rear of the vehicle and having a plurality of nozzles on the lower surface at regular intervals to spray liquid coating waterproofing material onto the surface to be coated; A pressure feeding means for feeding the liquid film waterproofing material in the waterproofing tank into the spray unit such that the liquid film waterproofing material is sprayed from the nozzle; And a controller provided in the cab of the vehicle for controlling the operation of each component.

According to this preferred feature of the invention, the spray unit comprises: a main spray bar configured to a length approximately corresponding to the width of the vehicle; At least two sub-spray bars are provided at both ends of the main spray bar so as to be foldable and folded and unfolded in accordance with the width of the surface to be coated.

According to another preferred feature of the present invention, a heating means includes a coil pipe in which hot oil is circulated, a cylinder inserted concentrically at an outer side of the coil pipe to form a hot gas flow path between them, and both sides of the cylinder. Spiral tubes arranged side by side and communicating with the coil tube to circulate the hot oil, an oil pump for circulating the hot oil in the coil tube and the spiral tubes, and coaxially inserted into the respective spiral tubes to transfer the coating waterproofing material Including a transfer screw and a burner for generating hot gas inside the coil pipe, the coating waterproofing material may be melted at a predetermined temperature by an indirect heating method.

In addition, the low cost high performance coating film type waterproofing composition construction method using the natural asphalt according to the present invention for achieving the second object described above, the coating film using the factory value of the low cost high performance coating film type waterproofing composition using the natural asphalt described above As a method of constructing a cross-sectional waterproofing layer,

Heating the solid film waterproofing material in the waterproof tank mounted on the vehicle to melt the liquid in a liquid at a predetermined temperature; Conveying the coating film waterproofing material melted in the liquid phase in the tank to a spray unit disposed in the width direction of the surface to be coated on the rear of the vehicle; Spraying the liquid coating film waterproofing material conveyed by the spray unit on the surface to be coated through a plurality of nozzles; Simultaneously proceeds with the pressure-feeding step and the spraying step of the coating waterproofing material, and driving the vehicle at a predetermined speed.

According to the construction device and the construction method of the low cost high performance coating film waterproofing composition using the natural asphalt according to the present invention, the coating film waterproofing material by simply spraying the natural asphalt coating waterproofing material for the bridge waterproofing while the vehicle is running. It can be applied automatically and uniformly at a constant temperature and thickness.

Therefore, despite the excellent waterproofing efficiency, it is possible to construct a natural asphalt-coated crosslinked waterproofing layer which was very fast and easy, which has the risk and complexity of the construction work, and the present invention provides the quickness, safety, ease and cost down of the construction of the crosslinked waterproofing layer. Great effect on the back.

Figure 1 is a perspective view showing the coating film type crosslink waterproof composition factory according to the present invention,
Figure 2 is a front view of the spray unit of the construction device of the present invention taken along II of Figure 1,
Figure 3 is a perspective view showing the main portion of the spray unit of the construction apparatus according to the present invention,
Figure 4 is a plan view schematically showing an example of the heating means of the coating film type crosslink waterproof composition construction apparatus according to the present invention,
5 is a block diagram showing a construction method using a factory value of the coating film type crosslink waterproof composition according to the present invention;
6 is a partially enlarged sectional view schematically showing another embodiment of the nozzle of the construction apparatus spray unit according to the present invention.

Specific features and other advantages of the low-cost, high-performance coating-type crosslink waterproofing composition construction method and construction method using the natural asphalt according to the present invention will become more apparent from the following description of the preferred embodiment with reference to the accompanying drawings.

In Figures 1 to 3, the coating-type cross-sectional waterproofing composition factory factory according to the present invention, including the vehicle 10, waterproof tank 20, heating means, spray unit 30, hydraulic unit 40 and controller It is composed.

The vehicle 10 has a trailer box 12 in the form of a trailer behind the cab 11.

The waterproof material tank 20 is fixedly installed on the storage box 12 of the vehicle 10. A manhole 21 is provided on the upper surface of the waterproof material tank 20, and through the manhole 21, a solid waterproof material, which is a coating-type cross-linking waterproofing composition mainly composed of natural asphalt, is introduced into the waterproof material tank 20.

Inside the waterproof material tank 20 may be provided with a stirring blade (not shown) for stirring the waterproof material so that the solid waterproof material melted by the heating means described later evenly melted.

The heating means heats the solid waterproof material contained in the waterproof material tank 20 to melt the liquid sealant at a predetermined temperature. Such heating means may be used in various forms, indirect heating method that can be maintained at a constant temperature by melting the solid-state waterproof material contained in the waterproof material tank 20 as a whole.

For this purpose, the heating means may be configured as a heater disposed in a predetermined form inside the waterproof tank 20, for example.

On the other hand, when the heating means is composed of a heater, the supply of the necessary power may be somewhat awkward, other forms of indirect heating means 50 using the fuel of the vehicle 10 may be taken.

For example, as shown in FIG. 4, a coil tube 51 in which hot oil is circulated therein and a cylinder inserted concentrically at intervals outside the coil tube 50 to form a hot gas flow path therebetween. 52 and two spiral pipes 53 and 54 arranged side by side on both sides of the cylinder 52 to circulate hot oil therein, and to supply hot gas into the coil pipe 51. It may be composed of a burner 55.

The coil pipe 51 and the two spiral pipes 53 and 54 are sequentially connected to each other so that the hot oil may be circulated by the oil pump 56.

In addition, transfer screws 57 and 58 are provided inside each of the spiral pipes 53 and 54 to help uniform melting by stirring and transferring the solid-state waterproofing material.

In this case, after the heating means 50 is introduced into the coil pipe 51 by the hot combustion gas generated from the burner 55 using the fuel of the vehicle 10, the coil pipe 51 and the cylinder 52 Is supplied to two spiral pipes 53 and 54 through a hot gas flow path formed between them, and the hot oil circulating between the coil pipe 51 and the spiral pipes 53 and 54 is heated by hot gas, thereby heating the heater. As such, it is possible to melt the solid-state waterproofing material by indirect heating method.

The spray unit 30 sprays the liquid waterproofing material S melted at a predetermined temperature by the heating means in the waterproofing tank 20 on the surface to be coated, that is, the concrete upper plate of the bridge, by the hydraulic unit 40 that is the conveying means.

To this end, the spray unit 30 is, for example, disposed in the width direction of the bridge, the tubular body 31 to which the liquid waterproofing material S is conveyed therein, and the lower surface of the body 31 is fixed along the longitudinal direction thereof. It consists of the several nozzle 32 arrange | positioned at the space | interval, and the several nozzle valve 33 which opens and closes these nozzle 32, respectively.

The nozzle valve 33 may be configured in various forms. For example, the nozzle valve 33 may be configured as a poppet valve or a ball valve. These nozzle valves 33 may be opened and closed individually, or may be configured such that a plurality of nozzle valves 33 are simultaneously opened and closed by one valve cylinder 34 as shown.

On the other hand, such a spray unit 30 is preferably formed with a length corresponding to the width of the vehicle 10, the main spray bar 35 fixed to the rear of the vehicle 10, and the main spray bar 35 The two sub-spray bars 36 and 37 can be folded at each end of the fold so as to be folded and unfolded according to the width of the surface to be coated.

Each sub spray bar (36) (37) is connected in communication with the main spray bar (35) by a swing joint (38), unfolded or folded with respect to the main spray bar (35) by an actuating cylinder (39). All.

The hydraulic unit 40 pumps the liquid waterproofing material S in the waterproofing tank 20 to the spray unit 30 at a predetermined pressure so that the liquid waterproofing material S is sprayed from each nozzle 32.

The hydraulic unit 40 may be composed of a hydraulic pump and a hydraulic motor, and may be mounted to the frame 60 and connected to the waterproof material tank 20 and the spray unit 30 through a hose.

A controller (not shown) electronically controls the driving of the above-described components. To this end, the controller embeds various data necessary for the coating type cross-linking waterproofing layer to be constructed and automatically controls it through a predetermined control program. For example, the injection amount of the liquid waterproofing material S according to the speed of the vehicle 10 is accurately controlled in a proportional control method by a program. Such a controller is preferably provided in the cab 11 of the vehicle 10 for the convenience of operation.

The coating film type crosslink waterproof composition factory according to the present invention having such a structural feature constructs a waterproof layer on the concrete top plate of the bridge by the method as shown in FIG. 5.

First, in step 100, the solid state waterproofing material whose main raw material is natural asphalt contained in the waterproofing material tank 20 mounted in the vehicle 10 is melted in a liquid phase by heating means such as a heater. At this time, the melting temperature of the liquid waterproof material is constantly controlled in the controller by a temperature sensor (not shown).

Next, in step 110, the hydraulic unit 40 pumps the liquid film waterproofing material melted in the waterproofing tank 20 to the spray unit 30 installed at the rear of the vehicle 10 through a hose. At this time, the flow rate of the liquid waterproofing material that is pumped to the spray unit 30 is automatically controlled by the controller in consideration of the speed of the vehicle 10 and the thickness of the cross-sectional waterproof layer.

Next, in step 120, the nozzle valves 33 of the spray unit 30 are opened simultaneously with the feeding of the liquid waterproofing material by the hydraulic unit 40, thereby over the concrete top plate of the bridge which is the surface to be coated at the plurality of nozzles 32. Spray the liquid waterproofing material (S) all at once.

Next, in step 130, the vehicle 10 travels at a predetermined speed in consideration of the coating thickness of the set crosslinked waterproofing layer, and thus the liquid waterproofing material S is continuously coated on the surface to be coated with a uniform thickness. . This vehicle driving step proceeds simultaneously with the pressure feeding step 110 and the injection step 120 of the liquid waterproofing material (S) described above.

On the other hand, Figure 6 schematically shows another embodiment of the nozzle 70 of the construction apparatus spray unit 30 according to the present invention.

In this embodiment, the nozzle 70 is formed in the shape of a circumference so that the liquid waterproofing material S is sprayed while rotating to obtain a more uniform coating thickness. To this end, the nozzle 70 is integrally formed with a hollow conical body 72 downwardly from the fastening portion 71 to the body 31 of the spray unit 30, and spirally formed on the conical body 72. A plurality of injection holes 73 through which the liquid waterproofing material S is injected are formed to pass through.

In addition, the outer surface of the conical body 72 is formed with a spiral guide groove 74 preferably coinciding with the injection holes 73 arranged in a spiral direction, the guide groove 74 is the injection hole 73 It guides the direction of injection of the liquid waterproofing material (S) is injected from the spiral direction serves to form a eddy.

Accordingly, the liquid waterproofing material S injected through the spiral injection hole 73 and the spiral guide groove 74 of the eddy nozzle 70 rotates and is sprayed onto the surface to be coated while forming a circumference to obtain a more uniform thickness. It becomes possible.

On the other hand, in addition to the above configuration in order to induce rotation of the conical body 72 itself about 60 through the bearing 75 between the fastening portion 71 and the spray unit 30 body 31 of the conical body 72 An eccentric line 76 inclined at ° may be further provided.

Therefore, the liquid waterproofing material S injected through the spiral jetting hole 73 and the spiral guide groove 74 of the eddy nozzle 70 rotates to form a circumference, and the eccentric line 76 is a liquid waterproofing material. By rotating in the same direction according to the rotational spray of (S) it can be advantageous to evenly waterproof layer construction is made even more spraying the waterproofing material.

On the other hand, the waterproof material tank 20 may be made of a metal material, the anti-corrosion coating layer may be applied to the waterproof material tank 20 of the metal material to prevent corrosion. The coating material of this anti-corrosion coating layer is 20% by weight of metcaptotriazole, 15% by weight of petroleum sulfonate, 10% by weight of mercaptobenzothiazole, 15% by weight of hafnium, 10% by weight of molybdenum emulsion (MoS2), and oxidation It is composed of 30% by weight of aluminum, the coating thickness can be formed to 8㎛.

Metcaptotriazole, petroleum sulfonate and mercaptobenzothiazole serve as corrosion protection and discoloration prevention.

Hafnium is a corrosion-resistant transition metal element that serves to have excellent waterproofness and corrosion resistance.

Molybdenum emulsion plays a role of imparting slidability and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance, chemical stability, and the like.

The reason for numerically limiting the ratio and the coating thickness of the components as described above, the inventors have shown the optimum corrosion protection effect in the ratio as a result of analysis through the test results several times.

In addition, the spray unit 30 may be coated with an antifouling coating layer made of an antifouling coating composition so as to effectively achieve prevention and removal of contaminants.

The antifouling coating composition includes an alkylate polyglucoside and an aminoalkyl slovetane in a 1: 0.01 to 1: 2 molar ratio, and the total content of the alkylate polyglucoside and the aminoalkyl slovetane is 1 to 10 based on the total aqueous solution. Weight percent.

The alkylate polyglucoside and aminoalkyl slovesteine is preferably 1: 0.01 to 1: 2 as the molar ratio. When the molar ratio is out of the above range, the coating property of the substrate is decreased or the moisture adsorption of the surface after application increases, thereby removing the coating film. There is a problem.

The alkylate polyglucoside and aminoalkyl slovesteine is 1 ~ 10% by weight of the total composition aqueous solution is preferred, if less than 1% by weight has a problem that the coating property of the substrate is lowered, if it exceeds 10% by weight increase the coating film thickness Precipitation is likely to occur.

On the other hand, it is preferable to apply | coat by the spray method as a method of apply | coating this composition for antifouling | polishing prevention on a base material. The final coating film thickness on the substrate is preferably 500 to 2000 kPa, more preferably 1000 to 2000 kPa. If the thickness of the coating film is less than 500 kPa, there is a problem of deterioration in the case of high temperature heat treatment.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mole of alkylate polyglucoside and 0.05 mole of aminoalkyl slovetane to 1000 ml of distilled water and then stirring.

In addition, the cab may be coated with a fragrance material having a sterilizing function, thereby having an effect of sterilizing the inside of the cab.

The fragrance material may be mixed with a functional oil, and the mixing ratio of the fragrance material is 95 to 97% by weight of the functional oil is mixed with 3 to 5% by weight of the functional oil, and the functional oil is decata dealcaca oil (Acacia dealbata oil) 50 Weight percent and 50 weight percent Valeriana fauriei oil.

The functional oil is preferably mixed with 3-5% by weight based on the perfume material. When the mixing ratio of the functional oil is less than 3% by weight, the effect is insignificant, and when the mixing ratio of the functional oil exceeds 3 to 5% by weight, the function thereof is not greatly improved while the manufacturing cost is greatly increased.

The main chemicals of Acacia dealbata oil are palmic aldehyde, enanthic acid, etc., with good fragrance and good effect on bactericidal, antidepressant and stress relief.

Valeriana fauriei oil (Valeriana fauriei oil) is the main chemicals such as bornyl acetate, pinene, etc., and acts to reduce blood pressure and calm and calm the mind, so it has an excellent effect on anxiety and relaxation.

Since the functional oil is coated on the cab, there is an effect of restoring the fatigue of the operator and sterilization inside the cab.

In addition, a color change part that changes color depending on temperature may be applied to the outer surface of the case of the controller. The discoloration unit may be applied to the surface of the case of the controller when two or more thermochromic substances that change color when a predetermined temperature or more is separated into two or more sections according to temperature changes, thereby determining a stepwise temperature change. On the part, a protective film layer is applied to prevent the discoloration part from being damaged.

Here, the color change part may be formed by applying a temperature change material having a color change temperature of 40 ° C. or higher and 60 ° C. or higher, respectively. The color change part is for detecting the temperature change of the paint by changing the color according to the case temperature of the controller.

The color change part may be formed by applying a color change material that changes color when the temperature is higher than a predetermined temperature to the case surface of the controller. In addition, the thermochromic material is generally composed of a microcapsule structure of 1 ~ 10㎛, it can be colored and transparent due to the binding and separation phenomenon depending on the temperature of the electron donor and the electron acceptor in the microcapsules.

In addition, the temperature change material is a color change is fast, it may have a variety of color change temperature, such as 40 ℃, 60 ℃, 70 ℃, 80 ℃, such a color change temperature can be easily adjusted in various ways. As such thermochromic materials, various kinds of thermochromic materials may be used based on principles such as rearrangement of molecules of organic compounds and rearrangement of atomic groups.

To this end, it is preferable that the discoloration unit is formed to apply two or more thermochromic materials having different discoloration temperatures to be separated into two or more sections according to the temperature change. The thermochromic layer is preferably a thermochromic material having a relatively low temperature discoloration temperature and a thermochromic material having a relatively high temperature discoloration temperature, more preferably having a discoloration temperature of 40 ° C. or higher and 60 ° C. or higher. The color change part may be formed using a temperature change material.

Through this, it is possible to check the temperature change of the controller step by step to detect the temperature change of the paint, thereby operating the controller in an optimal state, thereby preventing the damage of the controller due to overheating in advance.

In addition, the protective film layer is coated on the discoloration part to prevent the discoloration part from being damaged due to external impact, and to easily check whether the discoloration part is discolored, and at the same time, considering the weakness of the thermal discoloration material in heat, It is preferable to use.

10: vehicle 11: cab
12: loading box 20: waterproof tank
30: spray unit 30; body
32: nozzle 33: noble valve
34: valve cylinder 35: main spray bar
36, 37: sub spray bar 38: swing joint
39: working cylinder 40; Hydraulic unit
50: indirect heating means 51: coil pipe
52: cylinder 53, 54: spiral tube
55: burner 56: oil pump
57, 58: transfer screw 70: eddy nozzle
72 body 73 injection hole
74: guide groove 75: bearing
76: eccentric line S: liquid waterproofing material

Claims (4)

A vehicle having a loading box at the rear;
A waterproofing tank mounted on a loading box of the vehicle and storing the solid coating waterproofing material in a liquid state;
Heating means for melting the solid coating waterproofing material contained in the waterproofing tank into a liquid at a predetermined temperature;
A spray unit disposed in the width direction of the bridge at the rear of the vehicle and having a plurality of nozzles disposed on a lower surface at a predetermined interval to spray the liquid coating waterproofing material onto the surface to be coated;
Pumping means for conveying the liquid film waterproofing material in the waterproofing material tank to the spray unit such that the liquid film waterproofing material is sprayed from the nozzle; And
The controller is provided in the cab of the vehicle for controlling the operation of each component; low cost, high performance coating film-type bridge waterproof composition using natural asphalt, characterized in that it comprises a.
The method according to claim 1, wherein the spray unit,
A main spray bar configured to a length approximately corresponding to the width of the vehicle;
At least two sub-spray bars installed on both ends of the main spray bar so as to be foldable and folded and unfolded in accordance with the width of the surface to be coated are constructed.
The method according to claim 1, wherein the heating means,
A coil tube in which hot oil is circulated therein, a cylinder inserted concentrically on the outside of the coil tube to form a hot gas flow path therebetween, and arranged side by side on both sides of the cylinder and communicating with the coil tube A spiral pipe in which hot oil is circulated, an oil pump for circulating hot oil in the coil pipes and spiral pipes, a feed screw inserted coaxially into each of the spiral pipes to transfer the coating waterproofing material, and the coil pipe Construction device of a low cost, high performance coating film type bridge waterproof composition utilizing a natural asphalt, characterized in that it comprises a burner for generating hot gas therein.
As a coating-type bridge waterproof layer construction method using the factory value of the low-cost, high-performance coating-type bridge waterproof composition using the natural asphalt according to claim 1,
Heating the solid film waterproofing material in the waterproof tank mounted on the vehicle to melt the liquid in a liquid at a predetermined temperature;
Forcing the coating film waterproofing material melted in the liquid phase into the spray unit disposed in the width direction of the surface to be coated on the rear of the vehicle;
Spraying the liquid coating film waterproofing material conveyed by the spray unit on the surface to be coated through a plurality of nozzles;
Simultaneous with the step of injecting and spraying the coating waterproofing material, and the step of driving the vehicle at a predetermined speed; a low cost high-performance coating film type bridge waterproof composition using natural asphalt, characterized in that it comprises a.

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