Asphalt road pavement reinforcement method based on a functional surface layer with anti-icing properties including a emulsion adhesive layer

Abstract

The present invention relates to an asphalt road pavement reinforcement method, and more specifically, to an asphalt road pavement reinforcement method that integrates the existing asphalt pavement with newly constructed asphalt aggregate (asphalt concrete aggregate) to block moisture penetration and enhance structural stability, and forms a high-performance reactive coating layer on the uppermost surface layer to suppress freezing in winter and prevent slipping, thereby simultaneously improving the safety and durability of the road.

Description

Technology Field

[0001] The present invention relates to an asphalt road pavement reinforcement method that integrates the existing asphalt pavement with newly constructed asphalt aggregate (asphalt concrete aggregate) to enhance structural stability by blocking moisture penetration, and simultaneously improves the safety and durability of the road by forming a high-performance reactive coating layer on the uppermost surface layer to suppress freezing in winter and prevent slipping. Background Technology

[0003] The existing cutting and repaving processes for asphalt (asphalt concrete) roads have structural limitations, such as the easy occurrence of interlayer separation, delamination, and potholes during long-term use, due to insufficient shear adhesion between the newly installed asphalt concrete and the existing pavement caused by voids and microcracks on the cut surface. Furthermore, moisture entering the asphalt concrete causes internal damage due to repeated freezing and thawing, and black ice forms on the surface during winter, posing a constant risk of slipping accidents. Existing asphalt concrete paving technology lacks structural and functional solutions capable of simultaneously resolving internal freezing and surface freezing issues, and there is a problem of continuously increasing maintenance costs due to reliance on snow removal equipment and brine spraying.

[0004] Furthermore, existing anti-slip coatings only function to increase friction by creating surface roughness; consequently, there is a problem in that the anti-slip function effectively disappears the moment snow and ice accumulate on the coating during freezing conditions. In particular, when thin, transparent ice such as black ice forms, the surface roughness becomes completely ineffective, significantly increasing the risk of accidents. Additionally, general coating materials do not possess the ability to inhibit freezing itself, so the risk of slipping for pedestrians and vehicles persists during snowfall or a rapid drop in temperature unless snow removal is carried out quickly. This necessitates managers to repeatedly spray brine or de-icing agents and continuously deploy equipment and personnel, leading to increased maintenance costs.

[0005] One of the major problems with asphalt paved roads is concrete deterioration caused by freeze-thaw cycles and de-icing salts. In particular, concrete structures in cold, snowy regions are subjected to repeated frost damage during the winter, and chloride-based de-icing agents are used on roads to maintain safe traffic flow during snowfall. During the winter snowy season, ice is prone to form, and since such freezing can lead to vehicle accidents and pedestrian safety hazards, it is necessary to rapidly melt the snow accumulated on the roads to prevent freezing. In particular, as record-breaking heavy snowfall is occurring frequently due to recent abnormal weather patterns, significant attention is being paid to anti-icing agents for winter roads.

[0006] Furthermore, although black ice, formed not only by snow but also by frost or freezing, has a high potential to cause major traffic accidents with high fatality rates, removing it manually is more difficult because, unlike snow, it is hard to determine when it has formed.

[0007] There are methods to prevent the formation of black ice, such as using physical means like heat and electricity or using chemicals that cause freezing point depression. However, since physical means like heat and electricity are expensive and therefore not realistic alternatives, preventing freezing through freezing point depression using chemicals is the most realistic method.

[0008] Calcium chloride, sodium chloride, acetates, ethylene glycol, and propylene glycol are used as antifreeze agents. However, because these antifreeze agents have low viscosity and run off the road surface easily, while they provide rapid antifreeze effects, they lack persistence, resulting in the inconvenience of having to reapply them whenever snow falls. In particular, chloride salts such as calcium chloride and sodium chloride pose problems due to side effects such as environmental pollution and corrosion of vehicles and bridges caused by chloride accumulation. Prior art literature

[0010] Korean Registered Patent No. 10-2385509 (Publication Date: April 1, 2024) Korean Registered Patent No. 10-2438241 (Publication Date: August 31, 2022) Korean Registered Patent No. 10-2011923 (Publication Date: October 22, 2019) Korean Registered Patent No. 10-2617803 (Publication Date: December 20, 2023) The problem to be solved

[0011] The present invention relates to a multi-layer composite road paving method in which, after cutting the aged asphalt concrete of an asphalt road, an emulsified asphalt (emulsion adhesive layer) having deep penetration power and long-term durable adhesion is applied to the cut surface to stabilize the structural layer, new asphalt aggregate (asphalt concrete aggregate) is laid and compacted thereon, and a high-performance reactive coating layer having black ice suppression and anti-slip functions is formed on the top surface. means of solving the problem

[0013] The asphalt road pavement reinforcement method of the present invention for achieving the above objective comprises the following steps: Step 1, cutting an aged asphalt road and then performing surface preparation on the cut area; Step 2, applying emulsified asphalt to the surface prepared in Step 1 to form an emulsified asphalt layer; Step 3, laying asphalt concrete aggregate mixed with an asphalt aggregate composition on the emulsified asphalt layer; Step 4, compacting and hardening the laid area to form an asphalt concrete layer; Step 5, applying a freezing-reducing functional coating material to the surface of the asphalt concrete layer in Step 4; and Step 6, leveling and heat-treating the applied coating material to form a coating film.

[0015] The term "asphalt structure" as used in this invention refers to facilities constructed of asphalt, such as sidewalks, automobile roads, bicycle paths, parking lots, and ramps. Effects of the invention

[0017] The emulsion asphalt used in this invention penetrates deeply into the voids within the cut surface to stabilize the base layer and secures long-term adhesion with newly constructed asphalt, thereby effectively suppressing interlayer separation, delamination, and the occurrence of potholes. Furthermore, by blocking moisture penetration, it reduces internal damage caused by freezing and thawing and can significantly improve structural durability. Additionally, the top functional layer significantly reduces the formation of black ice through freezing inhibition and rapid melting functions, and maintains anti-slip performance, thereby greatly reducing the risk of increased vehicle braking distances and skidding accidents. Moreover, the automatic snow removal effect reduces the frequency of snow removal equipment and / or de-icing agents, thereby reducing maintenance costs, and the reduced surface deterioration and wear extend the pavement lifespan. The asphalt road pavement reinforcement method of this invention has excellent constructability and a wide range of industrial applications. Brief explanation of the drawing

[0019] Figure 1 is a photograph of an existing old asphalt road surface constructed by applying the asphalt road pavement reinforcement method of the present invention. Specific details for implementing the invention

[0020] The present invention will be described in more detail below.

[0021] The present invention is a paving reinforcement method for aged asphalt (asphalt concrete) structures (e.g., asphalt roads, asphalt parking lots, etc.), comprising the following steps: Step 1, cutting the aged asphalt road and then performing surface preparation on the cut area; Step 2, applying emulsified asphalt to the surface prepared in Step 1 to form an emulsified asphalt layer; Step 3, laying asphalt concrete aggregate mixed with an asphalt aggregate composition on the emulsified asphalt layer; Step 4, compacting and hardening the laid area to form an asphalt concrete layer; Step 5, applying a freezing-reducing functional coating material to the surface of the asphalt concrete layer in Step 4; and Step 6, leveling and heat-treating the applied coating material to form a coating film.

[0022] In addition, step 6 may further perform one or more processes selected from the non-slip pattern forming process and the silica sand coating process before the flattened film gels.

[0023] Figure 1 shows an actual photograph of the overall asphalt structure of the present invention, preferably an asphalt road pavement reinforcement method.

[0025] Step 1 is a process of removing all or part of the aged asphalt pavement to which the pavement reinforcement method of the present invention is applied, for example, cutting the existing asphalt within the road pavement construction area using a crusher, and preparing the crushed material and the base surface.

[0027] Step 2 is a process of forming an emulsified asphalt layer (or emulsified adhesive layer) by applying emulsified asphalt, which is an emulsified adhesive, to the top of the prepared surface to increase the bonding strength between the prepared surface and the asphalt aggregate formed by laying, and to facilitate the laying of Step 3 even on slopes.

[0028] The emulsified asphalt (emulsion adhesive) of the second stage comprises straight asphalt, a urethane-modified silicone polymer resin, a penetration enhancer, a fluidity enhancer, and a solvent, preferably comprising 15 to 25 weight% of straight asphalt, 30 to 50 weight% of urethane-modified silicone polymer resin, 5 to 10 weight% of penetration enhancer, 2 to 8 weight% of fluidity enhancer, and the remaining amount of solvent among 100 weight%, more preferably comprising 20 to 23 weight% of straight asphalt, 42 to 48 weight% of urethane-modified silicone polymer resin, 6 to 10 weight% of penetration enhancer, 4 to 7 weight% of fluidity enhancer, and the remaining amount of solvent among 100 weight%.

[0029] The above urethane-modified silicone polymer resin plays a role in significantly improving the adhesion of the emulsified asphalt layer, and the above urethane-modified silicone polymer resin includes a compound represented by the following chemical formula 1.

[0030] In addition, if its content is less than 30% by weight of the total weight of the emulsified asphalt, the amount used may be insufficient to improve adhesion, and if it is used in excess of 50% by weight, the viscosity of the emulsified asphalt may be too high, resulting in poor workability during construction.

[0031] [Chemical Formula 1]

[0032]

[0033] In Chemical Formula 1, R 1 is -CH2OCH2CH3, -CH2OCH(CH3)2, or -CH2OC(CH3)3, preferably -CH2OCH(CH3)2 or -CH2OC(CH3)3. And, the above R of Chemical Formula 1 2 is a C2-C3 straight-chain alkylene group, preferably a propylene group. In addition, the above R of Formula 4 3 Is is, R 4 is a hydrogen atom, a C1-C3 straight-chain alkyl group, or -CH2OCH3, preferably R 4 is a C1 to C3 straight-chain alkyl group. Also, m in Chemical Formula 4 is an integer from 1 to 3, preferably 2 or 3. Also, * indicates a bonding site.

[0034] In addition, the penetration enhancer in the emulsified asphalt composition plays a role in ensuring that the emulsified asphalt is well absorbed and dispersed on a surface prepared, and may include one or more selected from potassium (C1-C5 alkyl) siliconate and 3-iodo-2-propynyl-N-butyl carbamate, and preferably may include potassium (C2-C3 alkyl) siliconate and 3-iodo-2-propynyl-N-butyl carbamate in a weight ratio of 1:0.30 to 0.40. Furthermore, if the content of the penetration enhancer is less than 5 weight% of the total weight% of the emulsified asphalt, the penetration effect on the existing asphalt concrete, which is the surface prepared for the emulsified asphalt, may be insufficient, and using more than 10 weight% is uneconomical and may rather reduce the adhesion enhancement effect, so it is appropriate to use it within the above range.

[0035] In addition, the fluidity enhancer in the emulsified asphalt composition plays a role in increasing the miscibility between emulsified asphalt compositions and increasing the spreadability of the emulsified asphalt, and it is preferable to use one comprising 12 to 16 weight% of polyoxyethylene lauryl ether and 84 to 88 weight% of hydrocarbon oil with an aromatic compound content of less than 0.5 weight%. Furthermore, if the content of the fluidity enhancer in the total weight% of the emulsified asphalt is less than 2 weight%, the effect of increasing the fluidity of the emulsified asphalt due to its use is insufficient, and if it is used in excess of 8 weight%, there may be a problem where the viscosity of the emulsified asphalt decreases rapidly; therefore, it is appropriate to use it within the above range.

[0036] In addition, the solvent in the emulsified asphalt composition includes one or more selected from n-hexane, ethyl cellosolve, and furfuryl alcohol, and preferably, using a mixture of three types of n-hexane, ethyl cellosolve, and furfuryl alcohol is advantageous in terms of miscibility and solubility between materials, and more preferably, it is better to use a mixture of n-hexane, ethyl cellosolve, and furfuryl alcohol in a volume ratio of 1:0.20 to 0.40:0.10 to 0.30.

[0037] Also, the application of the second stage of emulsified asphalt uses general application methods used in the industry and is not specifically limited.

[0038] The emulsified asphalt prepared with the above composition in the above content can satisfy a viscosity (Engle degree, 25°C) of 4 according to KS M 2203:2021 standards.

[0040] In the pavement reinforcement method of the present invention, the third step is a process of laying asphalt aggregate mixed with an asphalt aggregate composition on top of the emulsified asphalt layer formed in the second step.

[0041] The above asphalt aggregate composition includes modified emulsified asphalt, recycled aggregate, and water.

[0042] As the above asphalt aggregate composition, modified emulsified asphalt with the following composition is used in terms of compatibility with the two-stage emulsified asphalt layer and the effect of increasing bonding strength.

[0043] The above-mentioned modified emulsified asphalt comprises straight asphalt, modified epoxy acrylate resin, acrylic binder resin, flux oil, petroleum resin, surfactant, thickener, plasticizer, vegetable emulsifier, dispersant, and water, preferably comprising 48 to 56 wt% straight asphalt, 2.0 to 4.5 wt% modified epoxy acrylate resin, 4.0 to 10.5 wt% acrylic binder resin, 0.2 to 1.0 wt% flux oil, 0.3 to 1.0 wt% petroleum resin, 0.05 to 0.20 wt% surfactant, 0.5 to 1.5 wt% thickener, 0.2 to 1.0 wt% plasticizer, 0.1 to 1.0 wt% vegetable emulsifier, 1.0 to 3.0 wt% dispersant, and the remaining balance of water out of 100 wt%, preferably comprising 50 to 55 wt% straight asphalt and modified epoxy It may contain 2.5 to 4.0 wt% acrylate resin, 5.0 to 9.0 wt% acrylic binder resin, 0.3 to 0.8 wt% flux oil, 0.4 to 1.0 wt% petroleum resin, 0.05 to 0.15 wt% surfactant, 0.5 to 1.5 wt% thickener, 0.2 to 0.5 wt% plasticizer, 0.2 to 0.8 wt% vegetable emulsifier, 1.5 to 2.5 wt% dispersant, and the remaining amount of water out of 100 wt%.

[0044] Among the components of the modified emulsified asphalt, the straight asphalt serves as the main component of the emulsified asphalt and plays a role in providing adhesion between recycled aggregates. The straight asphalt is extracted from crude oil without altering the asphalt components as much as possible. Generally, asphalt is a form in which a solid polymer called asphaltene is dispersed within a highly viscous oily or resinous substance called petroleum or marten. The straight asphalt is primarily governed by the properties of petroleum, exhibiting excellent elasticity and adhesion, and thus can display properties suitable for road paving materials. As a preferred example, AP-3 and / or AP-5 may be used for the straight asphalt, but is not limited thereto. Furthermore, if its content is less than 48% by weight of the total weight of the modified emulsified asphalt, the mechanical properties of the laid and cured asphalt layer may be poor, and if it exceeds 56% by weight, it is uneconomical.

[0045] In addition, among the components of the modified emulsified asphalt, the modified epoxy acrylate resin plays a role in improving the bonding strength between the aged asphalt cutting surface and the emulsified asphalt layer, and also plays a role in improving the mechanical properties of the asphalt and improving crack resistance by reacting with a crack inhibitor. Furthermore, if the content of this in the asphalt composition is less than 2.5 weight%, the effect of increasing adhesion between the aged asphalt cutting surface and the emulsified asphalt layer and the crack prevention effect resulting from its use may be insufficient, and if it exceeds 4.0 weight%, the applicability of the asphalt concrete aggregate may decrease, and it may instead lower the impact resistance of the paved road, so it is appropriate to use it within the above range.

[0046] In addition, the above modified epoxy acrylate-based binder resin may use a compound represented by the following chemical formula 2.

[0047] [Chemical Formula 2]

[0048]

[0049] In Chemical Formula 2, the above A is and X is -CH2CH2C(=O)N(R 1 )(R 2 ) or -CH2CH2CH2C(=O)N(R 1 )(R 2 ) and preferably -CH2CH2C(=O)N(R 1 )(R 2 It is. And, R of chemical formula 2 1 and R 2 is independently a hydrogen atom, -SiH4, -Si(OH)3, -Si(OR 3 )3, preferably -SiH4, -Si(OH)3, -Si(OR 3 )3, and more preferably -Si(OH)3, -Si(OR 3 )3. Also, in chemical formula 2, R 3 is a C1 to C3 straight-chain alkyl group, n is 1 to 5, preferably n is 2 to 4. And, * indicates a bonding site.

[0051] In addition, the acrylic binder resin among the components of the modified emulsified asphalt plays a role in improving the bonding strength of the recycled aggregates together with the straight asphalt. If its content is less than 4.0 weight% of the total weight% of the modified emulsified asphalt, the effect of improving the mechanical properties of the emulsified asphalt layer due to its use may be insufficient, and if it is used in excess of 10.5 weight%, the impact resistance may decrease after the asphalt hardens, and microcracks may occur due to external impact, so it is better to use it within the above range.

[0052] In addition, the acrylic binder resin uses an acrylic copolymer resin obtained by copolymerizing a mixture comprising a hydroxylpropyl acrylate monomer, an aromatic vinyl monomer represented by the following chemical formula 3, a chain transfer agent, a polymerization initiator, and a solvent, preferably comprising 55 to 60 weight% of hydroxylpropyl acrylate monomer, 5 to 10 weight% of the aromatic vinyl monomer, 4 to 8 weight% of the chain transfer agent, 0.01 to 0.5 weight% of the polymerization initiator, and the remaining amount of solvent out of a total of 100 weight%, more preferably comprising 55 to 58 weight% of hydroxylpropyl acrylate monomer, 5 to 8 weight% of the aromatic vinyl monomer, 5 to 8 weight% of the chain transfer agent, 0.01 to 0.5 weight% of the polymerization initiator, and the remaining amount of solvent out of a total of 100 weight%.

[0053] [Chemical Formula 3]

[0054]

[0055] R of Chemical Formula 3 1 is a hydrogen atom or a C1-C3 alkyl group, preferably a hydrogen atom. And, R of Chemical Formula 3 2 is a C1-C3 alkylene group, preferably a propylene group. In addition, R of Formula 3 3 and R 4 Each is independently a hydrogen atom or a straight-chain C1-C5 alkyl group, preferably a hydrogen atom or a methyl group.

[0056] In addition, the chain transfer agent used in the manufacture of the acrylic binder resin may include one or more selected from CPDA (4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoic acid), DDMAT (S-Dodecyl-S'-(α,α'-dimethyl-α"-aceticacid)trithiocarbonate) and CPDB (2-cyano-2-propyl benzodithioate).

[0057] In addition, the polymerization initiator used in the manufacture of the above acrylic binder resin is C1~C 10 It may include one or more selected from alkyllithium, sodium alkoxide, potassium alkoxide, and lithium sulfonate, and preferably may include C2 to C5 alkyllithium or lithium sulfonate.

[0058] The solvent used in the manufacture of the above acrylic copolymer resin may include one or more selected from n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene, and xylene, and preferably may include one or more selected from n-hexane, n-heptane, and cyclohexane.

[0059] In addition, the flux oil among the components of the modified emulsified asphalt is a liquid oil immediately before asphalt extraction during the petroleum refining process, and plays a role in improving fluidity and workability and controlling adhesive performance. The flux oil has the characteristic of melting the asphalt and, after paving, adsorbing to the asphalt without affecting its quality. If the content of the flux oil exceeds 1.0 weight% of the total weight% of the modified emulsified asphalt, it may have a negative effect on the curing and bonding strength of the emulsified asphalt, and it is appropriate to use it within the above range.

[0060] In addition, among the modified emulsified asphalt components, the petroleum resin plays a role in increasing the miscibility between the modified emulsified asphalt components and may include one or more selected from coumarone-indene resin and C9 petroleum resin; preferably, coumarone-indene resin may be used, and more preferably, coumarone-indene resin having a softening point of 90 to 100°C may be used. Furthermore, if the petroleum resin content is less than 0.3% by weight of the total weight of the modified emulsified asphalt, the content is too low and the miscibility between the compositions may be poor, and even if used in excess of 1.0% by weight, there is no effect of increasing miscibility, so it is appropriate to use it within the above range.

[0061] In addition, among the components of the modified emulsified asphalt, the surfactant plays a role in increasing the miscibility between the compositions and preventing aggregate clumping together with the petroleum resin and the dispersant, and may include one or more selected from alkyltrimethylammonium chloride, alkylpyridinium chloride, distearyldimonium chloride, dialkyldimethylammonium chloride, alkyldimethylbenzylammonium chloride, alkylisoquinolinium bromide, and alkyldimethylmetharylammonium chloride. In addition, if the surfactant content is less than 0.05 weight% of the total weight% of the modified emulsified asphalt, the content is too low, so the effect of increasing the miscibility between the compositions is insufficient and the effect of preventing aggregate clumping may be insufficient, and if used in excess of 0.20 weight%, it may actually lower the mechanical properties of the paved asphalt, so it is appropriate to use it within the above range.

[0062] In addition, among the components of the modified emulsified asphalt, the thickener mentioned above serves to control the viscosity of the emulsified asphalt, and it is preferable to use hydroxypropyl methyl cellulose (HPMC) of the cellulose type. If the content of HPMC exceeds 1.5% by weight of the total weight of the modified emulsified asphalt, the viscosity of the emulsified asphalt may become too high and the compatibility between the recycled aggregate and the asphalt composition may decrease, so it is appropriate to use it within the above range.

[0063] In addition, paraffin wax can be used as the plasticizer among the components of the modified emulsified asphalt.

[0064] Next, the vegetable emulsifier among the modified emulsified asphalt components plays a role in improving the storage stability of the asphalt composition, and since there is almost no additional effect of improving storage stability due to excessive use even if used in excess of 1.0 weight%, it is appropriate to use it within the above range.

[0065] Next, among the modified emulsified asphalt components, the dispersant plays a role in increasing the miscibility between the aggregate and the emulsified asphalt components and increasing the fluidity of the asphalt composition, and is the C of polyoxyethylene glycol 10 ~C 18 It may contain fatty acid esters. Also, if the dispersant content is less than 1.0 weight% of the total weight% of the modified emulsified asphalt, the aggregates in the asphalt aggregate may clump together, and using more than 3.0 weight% is an excessive use, which may actually reduce the long-term durability of the paved asphalt, so it is appropriate to use it within the above range.

[0066] Next, water acts as a solvent among the modified emulsified asphalt components, and the remainder of the total weight percentage of the asphalt composition, in addition to the asphalt composition described above, is used.

[0068] Next, the impact improver in the asphalt composition plays a role in improving the durability of the asphalt road by improving impact resistance through the dispersion of impact and load applied to the road paved with the mixture of the asphalt composition. The amount used can be 5.0 to 20.0 parts by weight, preferably 8.0 to 15.0 parts by weight, per 100 parts by weight of the modified emulsified asphalt described above. At this time, if the amount of impact improver used is less than 5.0 parts by weight, the effect of improving impact resistance may be insufficient, and if used in excess of 20.0 parts by weight, mechanical strength may decrease; therefore, it is appropriate to use it within the above range.

[0069] In addition, the above impact enhancer is an inorganic elastomer, a molded body manufactured by processing a thermoplastic resin, and may be a spherical thermoplastic elastomer powder.

[0070] In addition, the spherical thermoplastic elastomer powder is suitable for having an average particle size of 0.1 to 0.7 mm, preferably 0.3 to 0.5 mm.

[0071] The above thermoplastic resin comprises a reaction product obtained by reacting a reaction mixture containing 96.0 to 97.5 wt% of a condensation polymer obtained by polymerizing a soft segment component and the remainder of a hard segment component; and 2.5 to 4.0 wt% of 5-Na sulfoisophthalic acid dihydroxyethyl ester. At this time, if the content of 5-Na sulfoisophthalic acid dihydroxyethyl ester in the reaction mixture is less than 2.5 wt%, the shape retention of the thermoplastic powder resulting from its application is too low, which may actually reduce shock absorption capacity; and if it exceeds 4.0 wt%, the elasticity of the thermoplastic powder is weak, which may reduce shock absorption capacity; therefore, it is preferable to use it within the above range.

[0072] In addition, the above condensation polymer is a condensation polymer obtained by polymerizing 50 to 62 weight% of a soft segment component and the remainder of a hard segment component, preferably a condensation polymer obtained by polymerizing 52 to 60 weight% of a soft segment component and the remainder of a hard segment component, and more preferably a condensation polymer obtained by polymerizing 53.0 to 58.0 weight% of a soft segment component and the remainder of a hard segment component. At this time, if the content of the soft segment component is less than 50 weight%, the elasticity and resilience of the thermoplastic elastomer powder decrease, and if it exceeds 60 weight%, although the elasticity of the thermoplastic elastomer powder is high, there may be a problem of relatively low mechanical strength, so it is preferable to include the soft segment component within the above range.

[0073] And, the soft segment component may include three types of polyols as polyol components, namely polyethylene glycol, poly(tetramethylene) glycol, and polypropylene glycol, preferably in a weight ratio of 1:0.7 to 0.8:0.05 to 0.10, and more preferably in a weight ratio of 1:0.65 to 0.69:0.12 to 0.16.

[0074] In addition, the hard segment component may include polybutylene terephthalate and polyethylene terephthalate, preferably in a weight ratio of 1:0.50 to 0.75, and more preferably in a weight ratio of 1:0.55 to 0.60.

[0076] Next, the low-temperature elasticity improver in the asphalt composition, together with the impact resistance improver, plays a role in dispersing external impacts on the paved road, improving impact resistance, increasing bonding strength between asphalt compositions, suppressing brittleness at low temperatures, and improving the serviceability of the asphalt pavement. The amount used may be 2.0 to 10.0 parts by weight, preferably 4.0 to 8.0 parts by weight, per 100 parts by weight of the modified emulsified asphalt described above. At this time, if the amount of low-temperature elasticity improver used is less than 2.0 parts by weight, the effect of improving low-temperature impact resistance due to its use may be insufficient, and if used in excess of 10.0 parts by weight, the viscosity of the asphalt composition becomes too high, which may lead to a decrease in workability; therefore, it is appropriate to use it within the above range.

[0077] The above low-temperature elasticity enhancer uses a modified process oil, and the modified process oil includes a modified process oil prepared by polymerizing a mixture of process oil, SBS (styrene-butadiene-styrene) resin with a styrene content of 10 to 40 weight%, and polyisoprene resin.

[0078] And, before preparing the modified process oil by polymerizing, the mixture comprises 30 to 35 weight% of the SBS resin, 15 to 25 weight% of the polyisoprene resin, and the remaining amount of process oil among 100 weight%, and preferably may comprise 32.0 to 34.0 weight% of the SBS resin, 18.0 to 23.0 weight% of the polyisoprene resin, and the remaining amount of process oil among 100 weight%.

[0080] Next, the wear resistance enhancer in the asphalt composition serves to prevent crack formation in the asphalt road and improve wear resistance, and may use a compound represented by the following chemical formula 4. Furthermore, the amount of wear resistance enhancer used may be 2.0 to 8.5 parts by weight, preferably 3.0 to 7.5 parts by weight, per 100 parts by weight of modified emulsified asphalt. At this time, if the amount of crack inhibitor used exceeds 8.5 parts by weight, it may actually reduce the impact resistance and / or toughness of the asphalt road due to excessive use, so it is appropriate to use it within the above range.

[0081] [Chemical Formula 4]

[0082]

[0083] In Chemical Formula 4, R 1 is a hydrogen atom, a methyl group, or an ethyl group, preferably R 1 is a hydrogen atom or a methyl group. And, R of Chemical Formula 4 2 is a methylene group, an ethylene group, or a propylene group, preferably an ethylene group or a propylene group, and more preferably a propylene group. And, R of Chemical Formula 4 3 is a hydrogen atom, a methyl group, or an ethyl group, preferably a hydrogen atom or a methyl group.

[0085] Next, the anti-stripping agent in the asphalt composition serves to improve the anti-stripping properties of the paved asphalt road, and a calcium phosphate ester with an HLB (Hydrphilic Hydrophobic Balance) value of 8 to 18 may be used, and preferably a calcium phosphate ester with an HLB of 10 to 15 may be used. In addition, the amount of anti-stripping agent used may be 0.5 to 2.5 parts by weight, preferably 1.0 to 2.0 parts by weight, per 100 parts by weight of modified emulsified asphalt. At this time, if the amount of anti-stripping agent used is less than 0.5 parts by weight, the amount is too small and the anti-stripping effect resulting from its use may be insufficient, and if it is used in excess of 2.5 parts by weight, the effect of using the anti-stripping agent may be reduced, so it is appropriate to use it within the above range.

[0088] Next, the recycled aggregate in the asphalt composition comprises aggregate and filler, and may include 5 to 10 parts by weight of filler per 100 parts by weight of aggregate.

[0089] In addition, the aggregate is an aggregate with a diameter of 1 to 20 mm, and general asphalt aggregates used in the industry can be used without limitation and may include concrete waste.

[0090] In addition, the above-mentioned filler serves to fill voids that are not filled with aggregate in the asphalt aggregate laying and leveled pavement layer, and may include one or more selected from limestone, cement, fly ash, recovered dust, steelmaking dust, foundry dust, blast furnace slag, and bentonite.

[0091] In addition, the amount of recycled aggregate used in the asphalt aggregate composition is appropriately 700 to 1,000 parts by weight, more preferably 800 to 950 parts by weight, per 100 parts by weight of the modified emulsified asphalt.

[0092] In addition, water is mixed in an appropriate amount according to the construction environment before laying the asphalt concrete aggregate, which is a mixture of asphalt aggregate compositions, to ensure compatibility and appropriate viscosity among the asphalt aggregate compositions.

[0094] In the asphalt road pavement reinforcement method of the present invention, step 4 is a process of compacting the area where asphalt aggregate is laid, using a general compaction method used in the industry (see FIG. 1). Then, the finishing step of step 4 involves cleaning the area around the paved asphalt aggregate, and after the emulsified asphalt has hardened, painting work such as lane markings is performed as needed.

[0096] In the asphalt road pavement reinforcement method of the present invention, step 5 is a process of forming a functional coating on the surface of the asphalt concrete layer formed by road pavement, which increases slip resistance and provides a freezing reduction function to reduce or prevent the formation of black ice, etc.

[0097] The 5-stage freezing reduction functional coating material consists of the following composition.

[0098] The above-mentioned freezing-reducing functional coating material is a two-component thermosetting resin comprising a main component and a curing agent.

[0099] The amount of the composition in the above coating material may include 3 to 10 parts by weight of the curing agent per 100 parts by weight of the main component, and more preferably, 4 to 8 parts by weight of the curing agent per 100 parts by weight of the main component. At this time, if the amount of curing agent used is less than 3 parts by weight, the curing time of the coating material becomes too long and physical properties such as the tensile strength of the coating and the bonding strength to the application surface may be poor, and if more than 10 parts by weight is used, the curing time of the coating material becomes too fast, resulting in poor workability and an uneven formation of the coating surface, so it is appropriate to use it within the above range.

[0100] Next, the subject comprises methyl methacrylate (MMA) resin, acrylic copolymer resin, antifreeze, high-strength elastic beads, a dispersant, dibutyl adipate, 3-methacryloxypropylmethyldimethoxysilane, and a diluent, preferably comprising 20 to 30 wt% MMA resin, 15 to 28 wt% acrylic copolymer resin, 10 to 15 wt% antifreeze, 5 to 10 wt% high-strength elastic beads, 0.5 to 2.0 wt% dibutyl adipate, 1.0 to 3.0 wt% 3-methacryloxypropylmethyldimethoxysilane, 2 to 5 wt% dispersant, and the remainder of 100 wt% diluent, more preferably comprising 23 to 29 wt% MMA resin, 16.0 to It may include 22.5 wt%, 10 to 13 wt% of a freezing inhibitor, 6.0 to 8.5 wt% of a high-strength elastic bead, 0.8 to 1.4 wt% of a dibutyl adipate, 1.5 to 2.5 wt% of a 3-methacryloxypropylmethyldiethoxysilane, 3 to 4 wt% of a dispersant, and the remaining amount of a diluent among 100 wt%.

[0101] At this time, if the MMA resin content is less than 20 weight% of the total weight of the composition, there may be a problem with insufficient acid resistance, alkali resistance, salt water resistance, etc. of the coating film, which is a mixture of the composition, and if more than 30 weight% is used, there may be a problem with reduced physical properties such as durability of the coating film due to a relative lack of content of other components.

[0102] Next, among the main components, the acrylic copolymer resin plays a role in improving the durability of the coating film by imparting elasticity and increasing water resistance to the coating film together with the MMA resin. Furthermore, if the acrylic copolymer resin content is less than 15 weight% of the total weight of the main component, the effect of improving the impact resistance and durability of the coating film due to its use may be insufficient, and if it is used in excess of 28 weight%, it is an overuse and may instead cause a problem of reduced tensile strength of the coating film.

[0103] In addition, the acrylic copolymer resin comprises a copolymer obtained by copolymerizing a mixture comprising a hydroxylpropyl acrylate monomer, an aromatic vinyl monomer represented by the following chemical formula 5, 2-hydroxyethyl methacrylate, methacrylic acid, a chain transfer agent, a polymerization initiator, and a solvent; preferably, the copolymer comprises a mixture comprising 43 to 50 wt% of hydroxylpropyl acrylate monomer, 3 to 8 wt% of the aromatic vinyl monomer, 2 to 6 wt% of 2-hydroxyethyl methacrylate, 0.5 to 4.0 wt% of methacrylic acid, 4 to 8 wt% of a chain transfer agent, 0.01 to 0.5 wt% of a polymerization initiator, and the remaining amount of solvent out of a total of 100 wt%; more preferably, the copolymer comprises 47 to 50 wt% of hydroxylpropyl acrylate monomer, the aromatic It may include a copolymer obtained by copolymerizing a mixture comprising 4 to 6 wt% of a vinyl monomer, 3 to 5 wt% of 2-hydroxyethyl methacrylate, 1.0 to 2.5 wt% of methacrylic acid, 5 to 8 wt% of a chain transfer agent, 0.01 to 0.5 wt% of a polymerization initiator, and the remaining amount of solvent out of a total of 100 wt%.

[0104] [Chemical Formula 5]

[0105]

[0106] R of chemical formula 51 is a hydrogen atom or a C1-C3 alkyl group, preferably a hydrogen atom. And, R of Chemical Formula 5 2 is a C1-C3 alkylene group, preferably a propylene group. In addition, R of Formula 5 3 and R 4 Each is independently a hydrogen atom or a straight-chain C1-C5 alkyl group, preferably a hydrogen atom or a methyl group.

[0107] The chain transfer agent used in the manufacture of acrylic copolymer resin may include one or more selected from CPDA (4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoic acid), DDMAT (S-Dodecyl-S'-(α,α'-dimethyl-α"-aceticacid)trithiocarbonate) and CPDB (2-cyano-2-propyl benzodithioate).

[0108] The polymerization initiator used in the manufacture of acrylic copolymer resins is C1~C 10 It may include one or more selected from alkyllithium, sodium alkoxide, potassium alkoxide, and lithium sulfonate, and preferably may include C2 to C5 alkyllithium or lithium sulfonate.

[0109] The solvent used in the manufacture of the acrylic copolymer resin may include one or more selected from n-pentane, n-hexane, n-heptane, isooctane, cyclohexane, toluene, benzene, and xylene, and preferably may include one or more selected from n-hexane, n-heptane, and cyclohexane.

[0110] Next, the above-mentioned antifreeze component among the main components plays a role in preventing the formation of black ice on the road surface formed by the temperature change caused by the endothermic or exothermic reaction of the phase change material, thereby affecting the temperature of the road surface formed by the asphalt concrete. If the antifreeze content is less than 10% by weight of the total weight of the main component, the effect of preventing the formation of black ice due to its use may be insufficient, and if it is used in excess of 15% by weight, the mechanical properties of the coating film may be insufficient due to excessive use, so it is appropriate to use it within the above range.

[0111] The above-mentioned freezing inhibitor may be one that is commercially available in the industry, and preferably, one manufactured by the following method is used.

[0112] The above-mentioned freezing inhibitor may be used by performing a process comprising: step 1, preparing volcanic rock powder supported with a phase change mixture by supporting volcanic rock powder in a phase change material emulsion solution; and step 2, drying the volcanic rock powder supported with the phase change mixture, and then coating and drying it with a melamine-based resin.

[0113] The above phase change material emulsion solution comprises 55 to 70 weight% of a phase change mixture, 2 to 5 weight% of a surfactant, and the remaining amount of water in 100 weight%, preferably 62 to 68 weight% of a phase change mixture, 2 to 5 weight% of a surfactant, and the remaining amount of water in 100 weight%, and more preferably 63 to 66 weight% of a phase change mixture, 2 to 5 weight% of a surfactant, and the remaining amount of water in 100 weight%. At this time, if the phase change mixture is less than 55 weight% or exceeds 70 weight%, it may not satisfy the appropriate latent heat enthalpy. Also, if the surfactant is less than 2 weight%, the phase change material in the emulsion solution may not be evenly mixed or dissolved, and even if used in excess of 5 weight%, there is no special increase in effect, so it is appropriate to use it within the above range.

[0114] The above phase change mixture comprises lauryl alcohol, n-tetradecane, icosane, and lauryl hydroxysulfitein, and preferably, the phase change mixture comprises 100 to 200 parts by weight of n-tetradecane, 20 to 100 parts by weight of icosane, and 10 to 30 parts by weight of lauryl hydroxysulfitein per 100 parts by weight of lauryl alcohol, and more preferably, comprises 120 to 180 parts by weight of n-tetradecane, 35 to 50 parts by weight of icosane, and 15 to 22 parts by weight of lauryl hydroxysulfitein per 100 parts by weight of lauryl alcohol, which is advantageous in terms of satisfying an appropriate latent heat enthalpy.

[0115] It is advantageous to use a phase change material (phase change mixture) of the above phase change material emulsion solution that satisfies a latent heat enthalpy of 100 to 600 J / g, preferably 300 to 580 J / g, and more preferably 350 to 560 J / g, in terms of preventing black ice formation.

[0116] In addition, it is appropriate to use SDS (Sodium Dodecyl Sulfate) as the above surfactant.

[0117] Next, among the main components, the high-strength elastic beads are used to enhance the anti-slip effect by imparting frictional resistance performance to the coating film, and to strengthen impact resistance while acting as a structural buffer layer for the entire coating film. They are sheath-core type beads with a particle size of 10 to 100 μm, preferably 20 to 70 μm, and are spherical or elliptical.

[0118] The above-mentioned sheath-core type bead is composed of a sheath portion having an elastomer coating layer formed on all or part of the surface of a core portion composed of glass beads surface-modified with SiH4.

[0119] The above elastomer coating layer comprises a copolyester ether elastomer, and the copolyester ether elastomer may comprise poly(cyclohexylene dipropylene cyclohexane dicarboxylate).

[0120] In addition, if the high-strength elastic bead content is less than 5 weight% of the total weight of the main component, the anti-slip effect of the repair coating may be insufficient, and if used in excess of 10 weight%, the impact resistance of the coating may decrease due to excessive use, which may result in reduced durability.

[0121] Next, among the main components, the dibutyl adipate plays a role in increasing durability and extending the lifespan by strengthening heat resistance characteristics through UV blocking and oxidation prevention of the coating film. If the amount is less than 0.5 weight% of the total weight of the main component, the amount used is too small and the effect of its use may be negligible. If the amount used exceeds 2.0 weight%, the compatibility between the main components is reduced due to overuse, which may actually lower the mechanical properties of the coating film; therefore, it is appropriate to use it within the above range.

[0122] Next, the 3-methacryloxypropylmethyldiethoxysilane among the main components plays a role in preventing cracks in the coating film and increasing adhesion and bonding strength with the surface of the asphalt structure. If it is less than 1.0 weight% of the total weight% of the main component, the amount used is too small and the effect of its use may be insufficient, and if it is used in excess of 3.0 weight%, the viscosity of the coating material becomes too high and the workability of the coating material may be reduced, so it is appropriate to use it within the above range.

[0123] Next, among the main components, the dispersant comprises a mixture of sodium polyacrylate-2-sodium carboxymethylcellulose sodium and ethylene glycol, and preferably may comprise a mixture of 20 to 40 weight% sodium polyacrylate-2-sodium carboxymethylcellulose sodium and 60 to 80 weight% ethylene glycol. Furthermore, if the amount of dispersant used is less than 2 weight% of the total weight% of the main component, the dispersion of silica sand and / or high-strength elastic beads within the coating film may not be uniform, and if used in excess of 5 weight%, the acid resistance, alkali resistance, and / or salt water resistance of the coating film may be reduced due to excessive use; therefore, it is appropriate to use it within the above range.

[0124] Among the main components, the diluent serves to facilitate mixing between the main components and maintain the appropriate viscosity of the main component, and may include one or more selected from ethyl acetate, butyl acetate, tetrahydrofuran, normal hexane, methanol, ethanol, methylcyclohexanone, methylcyclohexanol, methylbutyl ketone, methyl ethyl ketone, methyl isobutyl ketone, 1-butanol, 2-butanol, cyclohexanone, cyclohexanol, acetone, ethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, isopentyl alcohol, and isopropyl alcohol. Preferably, a mixture of normal hexane, butyl acetate, and ethylene glycol monoethyl ether acetate in a weight ratio of 1:0.1 to 0.3:0.1 to 0.2 may be used.

[0126] Next, among the components of the freezing-reducing functional coating material, the curing agent is a curing accelerating component that plays a role in initiating the curing of the main component, and comprises benzoyl peroxide powder and a mixed solvent, preferably comprising 10 to 20 weight% of benzoyl peroxide powder and the remaining amount of the mixed solvent from 100 weight%, and more preferably may comprise 12 to 18 weight% of benzoyl peroxide powder and the remaining amount of the mixed solvent from 100 weight%.

[0127] In addition, among the curing agent components, the above-mentioned mixed solvent may be used by mixing abietic acid and polyindene in a weight ratio of 1:1 to 2.

[0128] The freezing-reducing functional coating material of the present invention described above may further include one or more additives selected from heat-insulating agents, antioxidants, heat stabilizers, leveling agents, hiding power enhancers, pigments, waterproofing enhancers, adhesion enhancers, defoaming agents, fillers, and UV stabilizers, within a range that does not degrade the physical properties of the coating.

[0129] Among the additives, the above defoamer is a water-based silicone defoamer that removes air bubbles within the repair material during application, thereby improving the appearance of the coating film upon drying. If the defoamer is not used, air bubbles may form in the coating film, and conversely, if an excessive amount is used, the appearance of the coating film may become poor, such as with the appearance of craters. A preferred example of the above defoamer is a modified silicone-based defoamer, and more specifically, SanNopco’s Nopco NXZ, Nopco 8034, LNopco NDW, SNDef 154, etc., may be used.

[0130] Among the additives, the above-mentioned heat-insulating agent serves to impart a heat-insulating effect to the coating film, and any paint heat-insulating component used in the industry can be used without limitation; preferably, heat-insulating pigments such as alumina powder or titanium oxide powder can be used.

[0131] In addition, among the additives, if it is desired to additionally impart color to the repair coating film, various organic pigments and / or inorganic pigments may be optionally used. As a preferred example, white pigments such as titanium dioxide, zinc white, zinc sulfide, or lithopone, and yellow pigments such as yellow iron oxide, nickel titanium yellow, chromium titanium yellow, cadmium sulfide, zinc cadmium sulfide, chromium yellow, etc. may be used.

[0132] Among the additives, the leveling agent increases smoothness so that the surface of the coating film is formed homogeneously and uniformly. Leveling agents used in the industry can be used without limitation, and preferably, water-based leveling agents are used.

[0133] In addition, among the additives, the filler plays a role in improving mechanical properties such as the wear resistance of the coating film, and extender pigments such as talc, silica sand, mica, and kaolin can be used.

[0134] Furthermore, among the additives, the aforementioned UV stabilizer prevents the discoloration of the coating film caused by contact with ultraviolet rays and air during or after drying. Since the UV stabilizer is the most effective at controlling long-term discoloration and yellowing, it enables the attainment of good physical properties in terms of weather resistance of the coating film against ultraviolet rays and air. Additionally, UV stabilizers are classified according to their functional roles into UV absorbers, UV blockers, etc., and may include one or more of benzotriazol-based UV blockers, benzophenone-based UV blockers, triazine-based UV blockers, organonickel-based UV blockers, and UV absorbers, but are not limited thereto.

[0136] Step 5 of the method of the present invention involves mixing a two-component thermosetting resin (main component, hardener) composed of the composition described above, and then applying the resulting coating material to the surface of an asphalt structure (road) (see Fig. 1). After applying the coating material appropriately, it is applied evenly to a minimum thickness of 1 mm or more, preferably 1.5 mm or more.

[0137] Then, the applied coating material is evenly leveled using a roller or the like, and the upper surface of the leveled coating material is heat-cured by heat treatment with a torch or the like to form a coating film.

[0138] As previously explained, a non-slip pattern can be formed before heat treatment and / or gelation of the coating material. A preferred example of forming a non-slip pattern is to form the non-slip pattern on the surface of the coating using a roller. In this case, a small amount of silica sand may be evenly sprinkled on the surface of the coating before gelation and before the non-slip pattern is formed, and then the non-slip pattern may be formed.

[0140] After performing Step 5, if any protective measures have been applied, remove them before the coating is completely cured, and once the coating is fully cured, inspect the surface of the construction and the surface of the structure (see Fig. 1).

[0142] The present invention will be explained in more detail below through examples, but the following examples are not intended to limit the scope of the invention and should be interpreted as being for the purpose of aiding understanding of the invention.

[0143] [Example]

[0144] Preparation Example 1: Preparation of Emulsified Asphalt (Emulsion Adhesive)

[0145] An asphalt primer was prepared by mixing 21.8 wt% straight asphalt (AP-5), 44.5 wt% urethane-modified silicone polymer resin, 8.2 wt% penetration enhancer, 5.2 wt% polyoxyethylene lauryl ether as a fluidity enhancer, and the remaining amount of solvent out of 100 wt%. At this time, the solvent used was a mixture of n-hexane, ethyl cellosolve, and furfuryl alcohol in a volume ratio of 1:0.25:0.12.

[0146] In addition, the above urethane-modified silicone polymer resin used a compound represented by the following chemical formula 1-1.

[0147] [Chemical Formula 1-1]

[0148]

[0149] In chemical formula 1-1, R 1 is -CH2OCH(CH3)2, and R 2 is a propylene group, and R 3 Is and R 4 is a methyl group, n is 2, and * indicates a bonding site.

[0150] The above penetration enhancer used was a mixture of potassium ethylsiliconate and 3-iodo-2-propynyl-N-butyl carbamate in a weight ratio of 1:0.35.

[0152] Experimental Example 1

[0153] The asphalt primer of Preparation Example 1 was commissioned to the Korea Institute of Construction & Living Environment Testing and Research to perform a physical property test. The test method was measured in accordance with KS M 2203:2021, and the results are shown in Table 1 below.

[0154] division unit Test results Exam location Viscosity (Engler degree, 25℃) - 4 1, 512 Gangwondaehak-gil, Chuncheon-si, Gangwon Special Self-Governing Province Sieve residue (1.18 mm) mass% 0.14 The charge of a particle - sheep Attachment - 2 / 3 or more Storage stability (24h) mass% 0.0 Evaporation residue mass% 54 Evaporation Residue - Penetration (25℃) 1 / 10 mm 103 Evaporation Residue - Scent (15℃) cm 105 Evaporation Residue - Toluene-soluble component mass% 99.33

[0155]

[0156] Comparison Preparation Example 1

[0157] Asphalt primer was prepared using the same method and composition as in Preparation Example 1 above, but without using urethane-modified silicone polymer resin.

[0159] Comparison Preparation Example 2

[0160] Asphalt primer was prepared using the same method and composition as in Preparation Example 1 above, but using only 21.5% by weight of urethane-modified silicone polymer resin.

[0163] Example 1-1: Preparation of Asphalt Aggregate Composition and Asphalt Concrete Aggregate

[0164] (1) Manufacture of modified emulsified asphalt

[0165] An asphalt composition was prepared by mixing 53.5 wt% of straight asphalt (AP-5), 3.6 wt% of modified epoxy acrylate resin, 7.8 wt% of acrylic binder resin, 0.6 wt% of flux oil, 0.6 wt% of petroleum resin coumarone-indene resin, 0.11 wt% of dialkyldimethylammonium chloride as a surfactant, 0.9 wt% of HPMC (Hydroxypropyl Methyl Cellulose) as a thickener, 0.38 wt% of paraffin wax as a plasticizer, 0.65 wt% of vegetable emulsifier, 2.0 wt% of C12 fatty acid ester of polyoxyethylene glycol as a dispersant, and the remaining amount of water out of 100 wt%.

[0166] The above modified epoxy acrylate resin used a compound represented by the following chemical formula 2-1.

[0167] [Chemical Formula 2-1]

[0168]

[0169] In Chemical Formula 2-1, the above A is and X is -CH2CH2C(=O)N(R 1 )(R 2 ) and, R 1 and R 2 is -Si(OH)3.

[0170] The above acrylic binder resin used was an acrylic copolymer resin obtained by copolymerizing a mixture comprising 53.9 wt% of hydroxylpropyl acrylate monomer, 6.6 wt% of an aromatic vinyl monomer represented by chemical formula 3-1, 5.7 wt% of CPDA (4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanyl]pentanoic acid) as a chain transfer agent, 0.19 wt% of lithium sulfonate as a polymerization initiator, and the remaining amount of n-hexane (solvent) out of a total of 100 wt%.

[0171] [Chemical Formula 3-1]

[0172]

[0173] R of Chemical Formula 3-1 1 is a hydrogen atom, and R 2 is a propylene group, and R 3 and R 4 It is a methyl group.

[0174] (2) Impact enhancer

[0175] As a molded article manufactured by processing a thermoplastic resin, spherical thermoplastic elastomer powder (average particle size 0.38 ~ 0.40 mm) was prepared as an impact enhancer. At this time, the thermoplastic resin comprises a reaction product obtained by reacting 55.2 wt% of a soft segment component and 96.4 wt% of a condensation polymer obtained by polymerizing the remainder of the hard segment component, and 3.6 wt% of 5-Na sulfoisophthalic acid dihydroxyethyl ester.

[0176] In addition, the soft segment component comprises polyethylene glycol, poly(tetramethylene) glycol and polypropylene glycol in a weight ratio of 1:0.75:0.07, and the hard segment component comprises polybutylene terephthalate and polyethylene terephthalate in a weight ratio of 1:0.61.

[0177] (3) Low-temperature elasticity enhancer

[0178] A mixture was prepared by mixing 32.8 wt% of SBS (styrene-butadiene-styrene) resin with a styrene content of 28.5 wt%, 20.6 wt% of polyisoprene resin, and the remaining amount of process oil out of 100 wt%. Then, a polymerization reaction was performed at 180°C to produce a modified process oil, which was prepared as a low-temperature elasticity enhancer.

[0179] (4) Filling aggregate

[0180] Aggregates with a diameter of 1 to 20 mm, including concrete waste, were prepared.

[0181] In addition, a filler was prepared by mixing blast furnace slag, fly ash, bentonite, and cement.

[0182] Filling aggregate was manufactured by mixing 8 parts by weight of filling material with 100 parts by weight of the above aggregate.

[0183] (5) Asphalt aggregate composition and asphalt aggregate which is a mixture thereof

[0184] A mixture (mixture) was prepared by mixing the asphalt composition by adding 10.5 parts by weight of the impact improver, 6.7 parts by weight of the low-temperature elasticity improver, 5.6 parts by weight of the wear-resistant improver represented by the following chemical formula 4-1, 1.7 parts by weight of a calcium phosphate ester (anti-stripping agent) having an HLB (Hydrphilic Hydrophobic Balance) value of 12 to 13, and 880 parts by weight of the filler aggregate to 100 parts by weight of the above modified emulsified asphalt, stirring slowly, and then slowly adding water.

[0185] [Chemical Formula 4-1]

[0186]

[0187] In Chemical Formula 4-1, R 1 is a hydrogen atom, and R 2 is a propylene group, and R 3 is a hydrogen atom.

[0189] Comparative Example 1-1

[0190] Emulsified asphalt was prepared in the same manner as in Example 1-1 above, but without using the modified epoxy acrylate resin among the emulsified asphalt components, and the remaining composition was the same and used in the same amount.

[0192] Experiment 2: Measurement of Adhesion and Tensile Bond Strength

[0193] (1) The adhesion (adhesion strength) between the emulsified asphalt (emulsion adhesive layer) prepared in Preparation Example 1 and the asphalt aggregate of Example 1-1 was measured as follows.

[0194] To compare the adhesion strength of emulsified asphalt (emulsion adhesive layer) and asphalt aggregate, a mortar specimen was prepared with a width of 20 cm, a length of 20 cm, and a thickness of 1 cm. Then, an asphalt primer was applied to one surface of the mortar specimen to a thickness of 0.1 mm, and then emulsified asphalt was applied to a thickness of 2 cm and cured to produce a test specimen.

[0195] Next, the test specimens were completely submerged in water and removed after 1, 3, 7, and 14 days, and the degree of detachment of the asphalt aggregate layer was measured by sensory evaluation, and the results are shown in Table 2 below. The evaluation was evaluated as passing if no detachment of the asphalt aggregate layer was observed, and as failing if detachment occurred.

[0196] Emulsified asphalt (emulsion adhesive layer) Asphalt aggregate 1 day 3 days 7 days 14th Preparation Example 1 Example 1 Passed Passed Passed Hapgyeong Comparison Preparation Example 1 Example 1 Passed Failure Failure Failure Comparison Preparation Example 2 Example 1 Passed Passed Failure Failure Preparation Example 1 Comparative Example 1 Passed Passed Passed Failure

[0198] Looking at the physical property measurement results in Table 2 above, Comparative Preparation Example 1, which did not use urethane-modified silicone polymer resin among the emulsified asphalt components, and Comparative Preparation Example 2, which used less urethane-modified silicone polymer resin, showed relatively lower long-term adhesion compared to the emulsified asphalt of Preparation Example 1.

[0199] In addition, Comparative Example 1-1, which did not use modified epoxy acrylate resin in the modified emulsified asphalt of the asphalt aggregate, showed insufficient long-term adhesion compared to the case where construction was performed with the emulsified asphalt of Preparation Example 1 and the asphalt aggregate of Example 1-1.

[0200] (2) The tensile bond strength of emulsified asphalt and asphalt aggregate was evaluated by tensile testing of specimens according to ASTM D 4541, Pull-off Strength test method, and the results are shown in Table 3 below.

[0201] In addition, as asphalt primers, commercially available SSC-1 was used for Control 1, and commercially available RSC-4 was used for Control 2.

[0202] Emulsified asphalt (emulsion adhesive layer) Asphalt aggregate Tensile bond strength (Mpa) Control group 1 (SSC-1) Example 1-1 0.87 Control group 2 (RSC-4) Example 1-1 0.88 Preparation Example 1 Example 1-1 1.00 Comparison Preparation Example 1 Example 1-1 0.92 Comparison Preparation Example 2 Example 1-1 0.94 Preparation Example 1 Comparative Example 1-1 0.87

[0203] Looking at the tensile bond strength measurement results in Table 3 above, when Preparation Example 1 was used as emulsified asphalt or Example 1 was used as asphalt aggregate, the tensile bond strength was relatively higher compared to Control Group 1 and Control Group 2.

[0204] In particular, it was confirmed that the specimens prepared with the emulsified asphalt (emulsion adhesive layer) and asphalt aggregate of the present invention possessed the highest tensile bond strength (adhesion).

[0207] Examples 1-2 to 1-3 and Comparative Examples 1-2 to 1-6

[0208] Asphalt concrete aggregate was prepared by mixing an asphalt aggregate composition in the same manner as in Example 1-1 above, and asphalt concrete aggregate (mixture of asphalt aggregate composition) with the composition shown in Table 4 below was prepared for each, and Examples 1-2 to 1-3 and Comparative Examples 1-2 to 1-6 were carried out respectively.

[0209] division Example 1-1 Examples 1-2 Examples 1-3 Comparative Example 1-2 Comparative Examples 1-3 Comparative Examples 1-4 Comparative Examples 1-5 Comparative Examples 1-6 Modified emulsified asphalt (parts by weight) 100 100 100 100 100 100 100 100 Impact enhancer (weight part) 10.5 10.5 10.5 10.5 10.5 10.5 10.5 10.5 Low-temperature elasticity enhancer (parts by weight) 6.7 6.7 6.7 - - - - - Wear resistance enhancer (parts by weight) 5.6 5.6 5.6 5.6 5.6 5.6 5.6 5.6 Anti-peeling agent (parts by weight) 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 Filling aggregate (parts by weight) 880 880 880 880 880 880 880 880 Modified Emulsified Asphalt (Weight%) Straight asphalt 53.5 53.5 53.5 53.5 53.5 53.5 53.5 53.5 Modified epoxy acrylate resin 3.6 3.6 3.6 3.6 3.6 3.6 3.6 0 Acrylic binder resin 7.8 4.7 9.4 3.2 11.0 7.8 7.8 7.8 Flux oil 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 petroleum balance 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 surfactants 0.11 0.11 0.11 0.11 0.11 0.11 0.48 0.11 Thickener 0.85 0.85 0.85 0.85 0.85 0.85 0.85 0.83 plasticizer 0.36 0.36 0.36 0.36 0.36 0.36 0.36 0.35 Vegetable emulsifier 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.64 Dispersant 1.8 1.8 1.8 1.8 1.8 0 1.8 1.8 water The remaining amount of 100 weight%

[0211] Experiment 3: Measurement of Physical Properties of Asphalt Concrete Aggregate 1

[0212] The tensile strength, toughness, non-stickiness, and presence or absence of plastic shrinkage cracks of the asphalt concrete aggregate, which is a mixture of asphalt aggregate compositions prepared in Examples 1-1 to 1-3 and Comparative Examples 1-2 to 1-6, were measured, and the results are shown in Table 5 below.

[0213] Tensile strength (tenacity, N / mm²) 2 Toughness is the most important mechanical property that enables asphalt pavement to withstand loads caused by wheel loads, and it is a physical property related to the expected lifespan of the road pavement. Toughness (N·mm) is the strength of the solid state of emulsified asphalt, and a higher value indicates higher durability. Non-tackiness refers to the degree of low adhesion to construction vehicle tire materials.

[0214] Non-stickiness was measured by applying emulsified asphalt over an asbestos packing and curing it, laying a rubber plate made of the same material as a truck tire on the cured emulsified asphalt, running a roller under a constant load, removing the rubber plate, and measuring the weight of the emulsified asphalt adhering to the rubber plate. The adhesion rate (%) was calculated based on Equation 1, and the lower the adhesion rate, the better the non-stickiness.

[0215] Plastic shrinkage cracks were measured by whether cracks occurred within 3 days of the cured emulsified asphalt used for the above non-stick measurement.

[0216] [Equation 1]

[0217] Adhesion rate (%) = (Weight of asphalt on rubber sheet / Weight of emulsified asphalt sprayed on asbestos packing) × 100%

[0218] division Tensile strength (N / mm²) 2 ) Toughness (N·mm) Adhesion rate (%, non-stick) Whether plastic shrinkage cracks occur Example 1-1 1.50 102 4.6 × Examples 1-2 1.39 93 9.7 × Examples 1-3 1.54 107 3.9 × Comparative Example 1-2 1.18 85 12.5 × Comparative Examples 1-3 1.58 116 3.8 ○ Comparative Examples 1-4 1.10 88 8.9 ○ Comparative Examples 1-5 1.33 98 7.5 × Comparative Examples 1-6 1.20 88 5.9 ○

[0220] Looking at the physical property measurement results in Table 5 above, the emulsified asphalt of Examples 1-1 to 1-3 is 1.30 N / mm 2 It showed high durability with a tensile strength of over 90 N·mm and toughness of over 90 N·mm, excellent non-stick properties with an adhesion rate of less than 10%, and results in no plastic shrinkage cracks.

[0221] In contrast, Comparative Example 2, in which an acrylic binder resin was used in an amount of less than 4.0 wt% as an emulsified asphalt composition, showed significantly insufficient tensile strength and toughness compared to Example 1-1 and Example 1-2, and a tendency for the adhesion rate to increase significantly.

[0222] In addition, Comparative Example 1-3, which used more than 10.5 wt% of acrylic binder resin, had a low adhesion rate and had somewhat higher tensile strength and toughness compared to Example 1-3, but had a problem with plastic shrinkage cracking.

[0223] In addition, Comparative Examples 1-4, which did not use a dispersant as an emulsified asphalt component, showed overall poor physical properties.

[0224] In addition, in the case of Comparative Example 5, in which a surfactant content exceeding 0.20 wt% was used, the tensile strength and toughness were actually reduced compared to Examples 1-1 to 1-3.

[0225] In addition, in the case of Comparative Examples 1-6, which used emulsified asphalt without using modified epoxy acrylate resin as an emulsified asphalt component, compared to Example 1, there was a problem of relatively insufficient tensile strength and toughness and plastic shrinkage cracking.

[0227] Examples 1-4 and Comparative Examples 1-7 to 1-8

[0228] Asphalt aggregate compositions were prepared in the same manner as in Example 1-1 above, but with different amounts of anti-stripping agents and anti-stripping agents in the asphalt aggregate composition (asphalt concrete aggregate), Example 1-4 and Comparative Examples 1-7 to 1-8 were carried out, respectively.

[0229] division Example 1-1 Examples 1-4 Comparative Examples 1-7 Comparative Example 1-8 Modified emulsified asphalt (parts by weight) 100 100 100 100 Impact enhancer (parts by weight) 10.5 10.5 10.5 10.5 Low-temperature elasticity enhancer (parts by weight) 6.7 6.7 6.7 6.7 Durability enhancer (parts by weight) 5.6 7.5 0 10.0 Anti-peeling agent (parts by weight) 1.7 2.0 0 3.5 Filling aggregate (parts by weight) 880 880 880 880

[0231] Experiment 4: Measurement of Physical Properties of Asphalt Concrete Aggregates 2

[0232] Tensile strength, toughness, adhesion rate, and occurrence of plastic shrinkage cracks were measured for the asphalt aggregates prepared in Examples 1-4, Comparative Examples 1-7, and Comparative Examples 1-8 using the same method as in Experimental Example 3 above, and the results are shown in Table 7 below.

[0233] division Tensile strength (N / mm²) 2 ) Toughness (N·mm) Adhesion rate (%, non-adhesiveness) Whether plastic shrinkage cracks occur Example 1-1 1.50 102 4.6 × Examples 1-4 1.54 95 9.0 × Comparative Examples 1-7 1.24 111 4.0 ○ Comparative Example 1-8 1.60 82 12.2 ×

[0234] Looking at the results of the physical property measurements in Table 7 above, in the case of Comparative Example 7, which did not use a durability enhancer and an anti-peeling agent, there was a problem with low tensile strength and plastic shrinkage cracks.

[0235] In addition, in the case of Comparative Example 1-8, in which more than 8.5 parts by weight of a durability enhancer and more than 2.5 parts by weight of an anti-peeling agent were used, compared to Example 1-4, the tensile strength was significantly improved, but there was a problem in that the toughness was significantly reduced and the adhesion rate was also reduced.

[0236] However, it was confirmed that Examples 1-1 and 1-4 had appropriate physical properties.

[0238] Experiment 5: Measurement of Physical Properties of Asphalt Concrete Aggregate 3

[0239] The stability, flow value, and void ratio of the asphalt composition mixture (admixture) of Examples 1-1 and 1-4 were measured, and the results are shown in Table 8 below. The stability and flow value were measured according to KS F 2337, and the void ratio was measured according to KS F 2364.

[0240] division Test method unit Passing criteria Example 1-1 Examples 1-4 Stability (°C) KS F 2337 N 3500 or more 15956 16371 Flow value KS F 2337 1 / 100cm 10 ~ 50 31 27 porosity KS F 2364 % 3 ~ 12 6.1 5.5

[0241] Both Example 1-1 and Example 1-4 showed results that satisfied the quality test criteria.

[0243] Preparation Example 3: Preparation of an Antifreeze

[0244] An antifreeze agent was prepared by mixing and stirring 64.5 wt% of a phase change mixture, 3.4 wt% of SDS (Sodium Dodecyl Sulfate), and the remaining amount of water out of 100 wt%.

[0245] At this time, the phase change mixture has a latent heat enthalpy of 425 to 440 J / g, and the phase change mixture comprises 145 parts by weight of n-tetradecane, 43 parts by weight of icosan, and 17 parts by weight of lauryl hydroxysulfitene per 100 parts by weight of lauryl alcohol.

[0247] Preparation Example 4: Preparation of High-Strength Elastic Beads

[0248] High-strength elastic beads were prepared as spherical sheath-core type beads with a particle size in the range of 40 to 70 μm, by coating the surface of glass beads (core part) surface-modified with SiH4 with poly(cyclohexylene dipropylene cyclohexane dicarboxylate) using a spray method and then heat-treating to form a coating layer (sheath part).

[0250] Example 2-1: Preparation of a freezing-reducing functional coating material

[0251] (1) Subject manufacturing

[0252] A main component was prepared by mixing 26.7 wt% MMA resin, 20.3 wt% acrylic copolymer resin, 10.5 wt% of the freezing inhibitor of Preparation Example 1, 7.2 wt% of the high-strength elastic beads of Preparation Example 2, 0.98 wt% dibutyl adipate, 1.88 wt% 3-methacryloxypropylmethyldiethoxysilane, 3.9 wt% dispersant, 0.12 wt% red pigment, and the remaining amount of diluent among 100 wt%.

[0253] At this time, the acrylic copolymer resin is a copolymer produced by copolymerizing a mixture of 48.6 wt% hydroxylpropyl acrylate monomer, 4.7 wt% aromatic vinyl monomer represented by chemical formula 5-1, 3.8 wt% 2-hydroxyethyl methacrylate, 1.7 wt% methacrylic acid, 6.2 wt% CPDB (2-cyano-2-propyl benzodithioate) as a chain transfer agent, 0.22 wt% lithium sulfonate as a polymerization initiator, and the remaining amount of solvent (n-hexane) out of the total 100 wt%.

[0254] [Chemical Formula 5-1]

[0255]

[0256] R of Chemical Formula 5-1 1 is a hydrogen atom, and R 2 is a propylene group, and R 3 and R 4 Each is a methyl group.

[0257] And, the above dispersant used a mixture of 28.2% by weight of sodium polyacrylate-2-sodium carboxymethylcellulose sodium and the remaining amount of ethylene glycol out of 100% by weight.

[0258] In addition, the above diluent used was a mixture of normal hexane, butyl acetate, and ethylene glycol monoethyl ether acetate in a weight ratio of 1:0.15:0.11.

[0259] (2) Preparation of curing agent

[0260] A curing agent was prepared by mixing 13.8 wt% of benzoyl peroxide powder and the remaining amount of a mixed solvent from 100 wt%.

[0261] At this time, the above-mentioned mixed solvent used was a mixture of abietic acid and polyindene in a weight ratio of 1:1.3.

[0263] (3) Manufacturing of coating material

[0264] A freezing-reducing functional coating material was prepared by stirring 4.6 parts by weight of the curing agent with respect to 100 parts by weight of the above-mentioned subject.

[0266] Examples 2-2 to 2-3 and Comparative Examples 2-1 to 2-2

[0267] Examples 2-2 to 2-3 and Comparative Examples 2-1 to 2-2 were carried out, respectively, by preparing a freezing-reducing functional coating material using the same composition as in Example 2-1 above, but with different compositional contents as shown in Table 9 below.

[0269] Comparative Example 2-3

[0270] A main component was prepared by mixing 52.7 wt% MMA resin, 18.2 wt% silica sand, 4.0 wt% dispersant, and the remaining amount of diluent out of 100 wt%, without using an acrylic copolymer resin in the main component.

[0271] Classification (Weight%) Example 2-1 Example 2-2 Example 2-3 Comparative Example 2-1 Comparative Example 2-2 Comparative Example 2-3 MMA Suzy 26.7 26.0 28.5 29.0 24.5 47.0 acrylic copolymer resin 20.3 18.4 17.7 22.5 20.0 - Freezing inhibitor (Preparation Example 1) 10.5 12.2 10.5 - 16.5 10.5 High-strength elastic beads 7.2 8.5 7.0 2.5 11.4 7.2 dibutyladylfate 0.98 1.05 0.81 1.16 0.98 0.98 3-Methacryloxypropylmethyldiethoxysilane 1.88 1.75 2.3 2.4 1.86 1.88 Dispersant 3.9 4.0 3.8 3.7 4.0 3.9 red pigment 0.12 0.12 0.12 0.12 0.12 0.12 diluent The remaining amount of 100 weight%

[0273] Experimental Example 6: Measurement of Physical Properties

[0274] The tensile strength, elongation, adhesion strength, and slip resistance (BPN) of the coating materials prepared in Examples 2-1 to 2-3 and Comparative Examples 2-1 to 2-3 were measured, and the results are shown in Table 10 below.

[0275] A coating material was applied to an asphalt specimen measuring 1 m in width and 1 m in length to a thickness of approximately 1.4 mm, and then heat-cured to form a coating film to produce the specimen, and the following physical properties were measured.

[0276] The adhesion strength of the asphalt was measured on an asphalt specimen prepared by applying a repair material to a thickness of 3 mm on an asphalt specimen measuring 1 m in width and 1 m in length, and then curing it to form a film.

[0277] (1) Measurement of tensile strength and maximum elastic modulus

[0278] Tensile strength and maximum elastic modulus were measured using test specimens prepared in a separate mold according to ASTM D 638 (Standard Test Method for Tensile Properties of Plastics).

[0279] (2) Adhesion strength (adhesion strength)

[0280] The adhesion strength between the coating and the asphalt substrate was measured according to ASTM D4541, and if the adhesion strength to the asphalt substrate (surface) is 1.0 MPa or higher, it is suitable for use as an asphalt road pavement surface modifier.

[0281] (3) Measurement of wear rate and slip resistance (BPN)

[0282] The wear rate (%) and skid resistance (BPN) were measured according to the Road Association standards, and a wear rate of 1.0% or less and a skid resistance of 55 BPN or more were evaluated as passing.

[0283] (4) Check the freezing point

[0284] A certain amount of water was sprayed onto the surface of the asphalt film formed on the specimen to allow it to accumulate, and after leaving it at -3°C, the time for freezing to occur was measured. The experiment was conducted to determine the freezing point by observing that when water freezes into ice, the film material releases heat, causing the surrounding temperature to rise.

[0285] division Example 2-1 Example 2-2 Example 2-3 Comparative Example 2-1 Comparative Example 2-2 Comparative Example 2-3 Tensile strength (Mpa) 25.2 25.5 24.9 25.6 24.5 17.3 Maximum elastic modulus (Mpa) 78.5 75.1 80.3 68.8 80.5 66.9 Asphalt adhesion strength 1.0 MPa or higher 2.3 2.5 2.0 2.7 1.5 1.3 Wear rate (%) 1.0% or less 0.4 0.5 0.4 0.2 1.2 1.3 Slip resistance (BPN) 55 BPN or higher 63 66 62 41 71 64 freezing point 2 hours 20 minutes 2 hours 40 minutes 2 hours 10 minutes 20 minutes 3 hours 10 minutes 2 hours 20 minutes

[0286] Looking at the physical property measurement results in Table 10 above, it was confirmed that the coating film formed from the coating material prepared in Examples 2-1 to 2-3 had a maximum elastic modulus of 23.0 MPa or higher and 75.0 MPa or higher, and thus had excellent elasticity and shock absorption.

[0287] In addition, it was confirmed that it has excellent adhesion strength to asphalt, low wear rate, and very high non-slip properties with a slip resistance of 55 BPN or higher.

[0288] In contrast, in the case of Comparative Example 2-1, which did not use an antifreeze agent and used less high-strength elastic beads, compared to Examples 2-1 and 2-2, it was found that the slip resistance was poor, the freezing point was too early, and there was no black ice prevention effect.

[0289] In addition, in the case of Comparative Example 2-2, which used an excessive amount of antifreeze and high-strength elastic beads, other physical properties were excellent, but compared to Examples 2-1 and 2-3, there was a problem of significantly reduced adhesion strength and increased wear rate, that is, a problem of reduced coating durability.

[0290] In addition, it was confirmed that the coating formed from the coating material of Comparative Example 2-3, which was manufactured using a main component that did not use an acrylic copolymer resin, had significantly lower tensile strength and adhesion strength and significantly increased wear rate when compared to Examples 2-1 to 2-3.

[0291] Through this, it was confirmed that the use of acrylic copolymer resins within the main components improves not only the mechanical properties of the coating film but also its adhesion strength. Furthermore, it was confirmed that the use of an antifreeze slows down the freezing speed, thereby effectively delaying or preventing the formation of black ice prior to snow removal operations. Additionally, it was confirmed that the use of high-strength elastic beads increases the elastic modulus of the coating film, thereby improving durability and enhancing slip resistance.

[0293] Manufacturing Example: Asphalt road pavement reinforcement construction

[0294] Asphalt road paving was performed using the emulsified asphalt (emulsion adhesive) prepared in Preparation Example 1, the asphalt aggregate prepared in Example 1-1, and the freezing-reducing functional coating material prepared in Example 2-1, and a construction photograph is shown in Fig. 1.

[0295] deteriorated due to deterioration, etc. The condition of the asphalt road surface was checked, the old asphalt road was cut and rebuilt, and then surface preparation, including the removal of foreign matter, was carried out.

[0296] Next, the emulsified asphalt (emulsified adhesive) of Preparation Example 1 was applied to the cut surface of the asphalt road.

[0297] Next, the asphalt aggregate prepared in Example 1-1 was sufficiently applied, then compacted and hardened, and then the surface was finished.

[0298] Next, after painting the lanes, etc., the road lanes, etc. were protected with masking tape so that the coating material would not adhere to surfaces other than the painted surface.

[0299] Next, the main component and the hardener, which are the components of the freezing-reducing functional coating material of Example 2-1, were rapidly mixed using an electric mixer to prepare the coating material. Afterward, the coating material was sufficiently applied to the asphalt road surface that had been prepared and cured, and then leveled with a trowel to form a coating film of approximately 1.5 to 1.7 mm.

[0300] Next, before the coating gelled, the surface was applied by rolling it with a roller to make it non-slip.

[0301] Next, protective coverings such as masking tape that had been used for protection work were removed.

[0302] Next, the surface of the coating was heat-treated to fully heat-cur it.

[0303] Next, the surface of the applied coating was inspected for any abnormalities (such as stickiness and coating condition), and the surface modification work on the asphalt road was completed.

[0305] The asphalt road pavement reinforcement method of the present invention can be applied to all asphalt pavement sections, i.e., asphalt structures, where there is a risk of freezing during the winter season, such as urban roads, intersections, ramp sections, industrial complex roads, and above-ground and underground parking lots, and exhibits high safety and durability, especially in sections with frequent braking and turning and high traffic volume.

[0307] The above description is merely an example of an embodiment of the present invention, and those skilled in the art may implement it in modified forms without departing from the essential characteristics of the present invention. Accordingly, the scope of the present invention should not be limited to the aforementioned embodiment but should be interpreted to include various embodiments within the scope equivalent to that described in the claims.

Claims

Claim 1 As an asphalt road surface reinforcement method, the method comprises: Step 1, cutting the aged asphalt road and performing surface preparation on the cut area; Step 2, applying emulsified asphalt to the surface prepared in Step 1 to form an emulsified asphalt layer; Step 3, laying asphalt concrete aggregate mixed with an asphalt aggregate composition on top of the emulsified asphalt layer; Step 4, compacting and hardening the laid area to form an asphalt concrete layer; and Step 5, applying a freezing-reducing functional coating material to the surface of the asphalt concrete layer from Step 4. A process comprising step 6, wherein the applied coating material is leveled and heat-treated to form a coating film; wherein the emulsified asphalt of step 2 comprises straight asphalt, urethane-modified silicone polymer resin, a penetration enhancer, a fluidity enhancer, and a solvent; and wherein the freezing-reducing functional coating material comprises a main component comprising 20 to 30 wt% methyl methacrylate (MMA) resin, 15 to 28 wt% acrylic copolymer resin, 10 to 15 wt% freezing inhibitor, 5 to 10 wt% high-strength elastic beads, 2 to 5 wt% dispersant, 0.5 to 2.0 wt% dibutyl adipate, 1.0 to 3.0 wt% 3-methacryloxypropylmethyldimethoxysilane, and the remaining amount of a diluent among 100 wt%; A two-component thermosetting resin comprising a curing agent; wherein the acrylic copolymer resin among the components of the freezing-reducing functional coating material comprises 43 to 50 wt% hydroxylpropyl acrylate monomer, 3 to 8 wt% aromatic vinyl monomer, 2 to 6 wt% 2-hydroxyethyl methacrylate, 0.5 to 4.0 wt% methacrylic acid, 4 to 8 wt% chain transfer agent, and 0.01 to 0.0% polymerization initiator.The freezing inhibitor among the components of the freezing-reducing functional coating material comprises a copolymer formed by copolymerizing a mixture containing 5% by weight and the remaining amount of solvent out of a total of 100% by weight, wherein the volcanic rock powder is supported in a phase change material emulsion solution to produce volcanic rock powder supported with a phase change mixture; It is manufactured by performing a process comprising the second step of drying volcanic rock powder supported with a phase change mixture, and then coating and drying it with a melamine-based resin; and the phase change material emulsion solution used for manufacturing the antifreeze comprises 55 to 70 wt% of a phase change mixture containing lauryl alcohol, n-tetradecane, icosnae, and lauryl hydroxysulfitene, 2 to 5 wt% of a surfactant, and the remaining balance of water among 100 wt%; the high-strength elastic beads among the components of the antifreeze-reducing functional coating material are sheath-core type beads with a particle size of 10 to 100 μm, composed of a core part consisting of glass beads surface-modified with SiH4, and a sheath part having an elastomer coating layer formed on all or part of the surface of the core part; and the dispersant among the components of the antifreeze-reducing functional coating material is A method for reinforcing asphalt road pavement based on a surface layer with a freezing reduction functional emulsion adhesive layer, comprising a mixture of 20 to 40 wt% sodium polyacrylate-2-sodium carboxymethylcellulose sodium and 60 to 80 wt% ethylene glycol, wherein the curing agent among the components of the freezing reduction functional coating material comprises benzoyl peroxide powder and a mixed solvent, and the mixed solvent is a mixed solvent comprising abietic acid and polyindene mixed in a weight ratio of 1:1 to 2; [Chemical Formula 5]. R of chemical formula 5 1 is a hydrogen atom or a C1–C3 alkyl group, and R 2 is a C1–C3 alkylene group, and R 3 and R 4 Each is independently a hydrogen atom or a straight-chain C1-C5 alkyl group. Claim 2 A method for reinforcing asphalt road pavement based on a surface layer with a freezing-reducing functional emulsion adhesive layer, characterized in that, in claim 1, the emulsified asphalt comprises 15 to 25 weight% straight asphalt, 30 to 50 weight% urethane-modified silicone polymer resin, 5 to 10 weight% penetration enhancer, 2 to 8 weight% fluidity enhancer, and the remaining amount of solvent among 100 weight%. Claim 3 The asphalt road pavement reinforcement method based on a surface layer with a freezing reduction function including an emulsion adhesive layer according to claim 1, wherein the asphalt aggregate composition comprises: modified emulsified asphalt including straight asphalt, modified epoxy acrylate resin, acrylic binder resin, flux oil, petroleum resin, surfactant, thickener, plasticizer, vegetable emulsifier, dispersant, and water; an impact resistance enhancer including an inorganic elastomer; a low-temperature elasticity enhancer; an abrasion resistance enhancer; an anti-stripping agent; recycled aggregate including aggregate and filler; and water. Claim 4 In claim 3, an asphalt road pavement reinforcement method based on a freezing-reducing functional surface layer including an emulsion adhesive layer, characterized in that the wear resistance enhancer comprises a compound represented by the following chemical formula 4; [Chemical Formula 4] In Chemical Formula 4, R 1 is a hydrogen atom, a methyl group, or an ethyl group, and R 2 is a methylene group, an ethylene group, or a propylene group, and R 3 is a hydrogen atom, a methyl group, or an ethyl group. Claim 5 delete Claim 6 An asphalt road pavement reinforcement method based on a surface layer with a freezing reduction functional surface layer including an emulsion adhesive layer, wherein in claim 1, step 6 further performs one or more processes selected from a non-slip pattern forming process and a silica sand coating process before the flattened coating film is gelled and heat-treated.

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