KR100674681B1 - Composition for coating asphalt concrete pavement and coating method thereof - Google Patents

Abstract

Provided is an asphalt concrete coating solution composition, which is superior in weather resistance and chemical resistance, has reduced drying and curing time, extends a life of asphalt concrete pavement, and prevents hydroplaning to improve vehicle stability. The asphalt concrete coating solution composition comprises 60-75wt% of inorganic matter having a self hardening property selected from crystalline silica, amorphous calcium silicate, and portland cement, 20-38wt% of a binder obtained by diluting vinyl ester resin to a solid content of 70-90% with methylmethacrylate monomer, followed by subjecting the diluted solution to a radical reaction using benzoylperoxide and amine, and 2-5wt% of inorganic coloring pigment selected from iron oxide, titanium oxide, barium lactate, and barium carbonate.

Description

Ascon coating liquid composition and coating method using the same {COMPOSITION FOR COATING ASPHALT CONCRETE PAVEMENT AND COATING METHOD THEREOF}

1 is a cross-sectional view of the construction of ascon coated by the present invention

Figure 2 is a plan view of the coating apparatus, the finisher and the near-infrared hot air heater drying apparatus used in the construction method according to the invention

Figure 3 is a side view of the coating apparatus, the finisher and the near-infrared hot air heater drying apparatus used in the construction method according to the invention

<Description of Symbols for Main Parts of Drawings>

1: Ascon layer 2: Primer layer

3: coating layer 4: inorganic

5: coating liquid mixing container 6: coating nozzle

7: finisher 8: near-infrared hot air heater

9: blocking film

The present invention relates to a coating liquid composition for ascon and a coating method of ascon using the same. More specifically, the construction is not only simple, but also has no problems such as cracking, abrasion, discoloration, and discoloration, and thus has excellent durability and high slip resistance. It relates to a color coating liquid composition for ascon which can reduce the risk of safety accidents and traffic accidents of pedestrians and a coating method of ascon using the same.

The term ascon used in the present invention is shortened asphalt concrete (asphalt concrete), and refers to a mixture of aggregates composed of asphalt and a fixed size of gravel, such as a sticky black petrochemical binder. . The general structure of Ascon pavement is composed of ascon pavement and subsurface, upper subbed and lower subbed, and the surface and substratum are heated and mixed with cement, crushed stone, sand, stone powder, and asphalt, and evenly crushed by roller. . On the other hand, the conventional color ascon construction method has a problem in that the construction cost is high by thickening the ascon pre-coated as a thick, and weather resistance by using an organic epoxy, urethane or asphalt pitch as a binder to bind the pigment to the aggregate This defect was a problem that the phenomenon of discoloration, discoloration of ascon color occurs. In addition, the binder used to repair it also has a problem in that weather resistance is poor due to poor weather resistance due to the use of the same type of binder to increase the bonding strength with the existing surface layer. In addition, their surfaces have low slip resistance, especially on roads, which exposes them to the risk of traffic accidents. In addition, due to the long curing time (about 6-24 hours) after coating, it was difficult to apply to existing roads and sidewalks due to the construction conditions in Korea, and it was very difficult to apply at night or in winter when the air temperature was low. there was.

The present invention is to solve the problems of the conventional construction and repair method of the color ascon as described above, simple and economical than the conventional construction and repair method of the color ascon, eco-friendly ascon coating liquid composition and do not use any organic solvents and To provide a coating method of ascon using the same. Another object of the present invention is to provide a coating liquid composition for ascon and a method for coating ascon using the same, which is excellent in durability without cracking, abrasion, discoloration, discoloration, etc., and prevents slipping by removing water during the rain. will be. Still another object of the present invention is to provide a coating method of ascon which can be applied even at night and winter by drastically reducing drying and curing time.

The present invention is basically a coating liquid composition for ascon which can be used to replace the color ascon or simply repair the discolored color ascon with a coating, and ascon coating method using the same, as well as easy construction, cracking, wear, discoloration, discoloration The present invention relates to a coating liquid composition for ascon and a method for coating ascon using the same, which is excellent in durability because it does not have such problems and can solve the water film phenomenon in rainy days and secure driving safety of the vehicle. To this end, the present invention is characterized in that the inorganic 60-75% by weight of self-curing, 20-38% by weight of a binder consisting of a reactive acrylic resin and epoxy resin in two-component aqueous and 2-5% by weight of inorganic pigment pigments Ascon coating step and asphalt concrete mixture after laying the asphalt concrete mixture, the ascon laying step, the coating step of coating the coating composition on the surface of the asphalt concrete, the coating liquid dispersion and adhesion step to solidify the adhesion with the asphalt surface, coated It provides a coating method of ascon, characterized in that the drying and curing step after curing the surface of the ascon.

Hereinafter, a detailed description of the coating method of ascon using the coating liquid composition for ascon according to the present invention in detail as follows. First, the asphalt concrete mixture is laid (1) and then compacted (ascon laying step). When the surface temperature of the asphalt concrete is below 60 ℃ after the compaction, the coating is made with a special inorganic-polymer resin of various colors. In this case, a dedicated coating machine (5, 6) consisting of 2-6 nozzles is used. To a dry coating thickness 200-500㎛ evenly applied to the surface of the asphalt concrete several times (coating step). The coating liquid composition, which is a resin of a special inorganic-polymer type, is used as a 60-75% by weight inorganic material such as crystalline silica, amorphous calcium silicate mixture, and portland cement, which has self-curing properties. It is made by mixing 20-38% by weight of a binder consisting of 2-5% by weight of an inorganic coloring pigment. The particle size of the inorganic material is preferably about 0.04-0.8 mm. The mixing ratio of the acrylic resin and the epoxy resin constituting the binder (polymer) is equivalent ratio of the reactive group to one-to-one, and oxides, emulsions, lactates, carbonates, chromates and hydroxides of zinc, titanium, lead, iron and aluminum. Inorganic pigments are used as coloring pigments, for example, iron oxide, titanium oxide, barium lactate, barium carbonate and the like can be used. On the other hand, the coating solution is a mixture of inorganic, polymer (binder) and coloring pigments can not only support all the colors required in the field, but also is an environmentally friendly material that does not use any organic solvents. The self-curing inorganic material 4, which is a component of the coating liquid, forms irregularities on the coated surface to solve the water film phenomenon of the road in rainy weather, and serves to improve driving safety of the vehicle by improving tire grounding performance.

After evenly applying the coating composition to the surface of the asphalt concrete, the coated coating is evenly spread using a specially prepared finisher (7) equipped with a circular rotary brush with a diameter of 25-35 cm (solid dispersion). And bonding step). When dispersion and adhesion of the coating solution is completed, the coated ascon is dried using a hot air heater and then naturally dried for a predetermined time (drying step). Preferably, the surface of the ascon coated with the coating liquid is dried at an ultra-high speed for 1-3 minutes using a near-infrared hot air heater 8 having a wavelength of 1.3 μm, and then naturally dried for 20-40 minutes. After drying, the construction is completed by curing again for a certain time.

How to repair the discolored color ascone is as follows. First, the surface of the decolored ascon is washed with water and then completely dried (washing and drying steps). Next, a primer 2 composed of a reactive two-component acrylic resin and an epoxy resin is applied to the surface of the ascon 1 so as to have a dry coating thickness of 20-50 μm, and then the surface is completely dried (primer). Application step). After the primer coating is completed, the construction is carried out in the same manner as the above-described coating method of Ascon, and the coating liquid composition is dried at a thickness of 200-500 μm using a dedicated coating machine (5, 6) consisting of 2-6 nozzles. Apply to the surface of asphalt concrete as many times as possible (coating step). After evenly applying the coating composition to the surface of the asphalt concrete, spread the applied coating evenly by using a specially prepared finisher (7) equipped with a circular rotary brush with a diameter of 25-35 cm to firmly adhere to the surface ( Dispersion and adhesion step), When the dispersion and adhesion of the coating solution is completed, the coated ascon is dried using a hot air heater and then naturally dried for a predetermined time (drying step). Preferably, the surface of the ascon coated with the coating liquid is dried at an ultra-high speed for 1-3 minutes using a near-infrared hot air heater 8 having a wavelength of 1.3 μm, and then naturally dried for 20-40 minutes. After drying, the construction is completed by curing again for a certain time.

On the other hand, the coating composition described above is difficult to work because the coating film is difficult to form at 5 ° C or less with an aqueous coating agent using water. Therefore, in winter and winter weather, the binder used for the primer and the color coating agent should be used differently. In the present invention, the vinyl ester resin reacted with the epoxy resin and the acid is diluted with methyl methacrylate monomer to adjust the solid content to 70-90%. After that, a benzoyl peroxide that is a peroxide is used as a curing agent and a binder that is radically reacted using an amine as a curing catalyst is used for the winter season. The binder can also work at -25 ℃, because the drying time is fast, it is not necessary to use a hot air heater. However, since the reaction with the curing agent is so short that the pot-life is about 10 minutes, the construction should be divided by the amount that can be worked within about 10 minutes.

The present invention is an environmentally friendly composition and method that does not use any organic solvent. According to the present invention, ascon is coated with a resin of a special inorganic-polymer system having a variety of colors, and can be easily repaired or discolored color ascone. And, it drastically reduces the drying and curing time, there is an effect that can be installed at night and winter. In addition, the coating liquid composition and coating method according to the present invention has excellent weather resistance unlike conventional coating liquids and coating methods, and does not have problems such as cracking, abrasion, discoloration, and discoloration, and has excellent chemical resistance, thereby extending the life of ascon pavement. Resources can be saved, and the unevenness of the construction road eliminates the water curtain phenomenon in rainy weather, which improves the driving safety of the vehicle.In addition, the roads, pedestrian paths, bicycle and automobile roads, bus lanes, theme streets, parks, schools It can be installed in zones, stadium tracks, child protection zones, anti-slip areas, parking lots, etc., and it is effective to secure the safety of pedestrians and vehicles.

Claims (8)

delete 60-75% by weight of an inorganic material having a self-hardening selected from crystalline silica, amorphous calcium silicate, and portland cement; 20-38% by weight of a binder obtained by diluting the vinyl ester resin with a methyl methacrylate monomer to adjust the solid content to 70-90% and radical reaction using benzoyl peroxide and amine; And 2-5% by weight of an inorganic colored pigment selected from iron oxide, titanium oxide, barium lactate and barium carbonate. The ascon coating liquid composition according to claim 2, wherein the inorganic particle size is 0.04-0.8 mm. delete delete delete Ascon laying step of compacting after laying the asphalt concrete mixture; When the surface temperature of ascon is below 60 ℃ after compaction, 60-75% by weight of inorganic hardener having a particle size of 0.04-0.8mm selected from crystalline silica, amorphous calcium silicate and portland cement, vinyl ester resin Was diluted with methyl methacrylate monomer to adjust the solid content to 70-90%, and then selected from among 20-38% by weight of a binder reacted with benzoyl peroxide and amine and iron oxide, titanium oxide, barium lactate and barium carbonate. A coating step of applying a coating liquid composition containing 2-5% by weight of an inorganic coloring pigment to a surface of ascon to have a dry coating thickness of 200-500 μm; Dispersion and adhesion step of spreading the coating liquid applied to the surface of ascon evenly using a finisher to firmly adhere to the surface; And a method of coating ascon, characterized in that the drying and curing step of curing the coated ascon surface after natural drying. A washing and drying step of washing the surface of the decolored ascon with water and then drying it completely; On the surface of the completely dried ascon, the vinyl ester resin was diluted with methyl methacrylate monomer to adjust the solid content to 70-90%, and then the radical reaction using benzoyl peroxide and amine was carried out using a primer. Primer coating step of completely drying the surface after the coating to 50㎛; After the applied primer is completely dried, 60-75% by weight of inorganic hardener having a particle size of 0.04-0.8 mm selected from crystalline silica, amorphous calcium silicate and portland cement, and vinyl ester resin is diluted with methyl methacrylate monomer. 20-38% by weight of the binder by radical reaction using benzoyl peroxide and amine and 2-5% by weight of inorganic pigment selected from iron oxide, titanium oxide, barium lactate and barium carbonate. A coating step of applying a coating solution composition containing the mixed to the surface of ascon so as to dry film thickness 200-500㎛; Dispersion and adhesion step of spreading the coating liquid applied to the surface of ascon evenly using a finisher to firmly adhere to the surface; And a method of coating ascon, characterized in that the drying and curing step of curing the coated ascon surface after natural drying.

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