KR101344366B1 - Coating material of asphaltic sealing for preparatory maintenance and construciton method using the same - Google Patents

Abstract

The present invention relates to a coating material for asphaltic sealing for preparatory maintenance and a construction method using the same. More specifically, the coating material improves bonding strength and abrasion by adding UV stabilizers, synthetic polymers, and functional adhesion promoters to asphalt modified with styrene-butadiene-styrene block copolymers. [Reference numerals] (a) Modified asphalt mixture;(AA) Modified asphalt (PG 76-22);(b) Emulgen;(BB) UV stabilizers;(c) Fine mixture of reinforcement;(CC) Functional adhesion promoter;(d) Modified asphalt mixture emulsion;(DD) Surfactant;(e) Asphalt seal coating agent;(EE) Acid;(FF) Synthetic polymer;(GG,KK) Colloid mill;(HH,LL) Add water;(II) Synthetic calcium carbonate;(JJ) Fumed silica

Description

Asphalt seal coating material for preventive maintenance and construction method using the same {Coating Material of Asphaltic Sealing for Preparatory Maintenance and Construciton Method Using the Same}

The present invention relates to an asphalt seal coating material for preventive maintenance and a construction method using the same, more specifically, UV stabilizer, synthetic on asphalt modified with styrene-butadiene-styrene block copolymer (Styrene-Butadiene-Styrene Copolymer) Modified asphalt mixture emulsions, such as inorganic mixtures, are added to modified asphalt mixture emulsions that have high stability, dispersion, and storage stability by applying the best surfactant. Asphalt seal coating material for preventive maintenance by dispersing reinforcement material and applying spray gun or push rod such as emulsion sprayer on the surface of aging pavement to improve adhesion strength and wear to the aging pavement surface It relates to a construction method using the same.

As the years of use of domestic paved roads increase, the performance deteriorates and breakage increases, and the possibility of potential damage is also increasing in areas where there is no damage. These sections should be assessed for the condition of failure and subjected to appropriate repair and reinforcement if necessary.

The causes of pavement damage are divided into internal factors and external factors. The types of pavement are different according to the type of pavement design, design characteristics, construction characteristics, etc., and depending on the position where the pavement is placed and the position where the pavement is applied, do. Internal factors include insufficient pavement cross section, material failure, poor mix design, and external factors include vehicle overload, environmental load, and installation failure. Pavement roads also cause various problems depending on the characteristics of the ground, topography, rainfall, changes in temperature, environmental factors such as rainfall, and traffic characteristics such as traffic volume and medium composition ratio. Therefore, in order to provide road users with pleasant and safe roads continuously, the road pavement management practitioner should identify the cause of damage to the road pavement, do.

Asphalt pavement is a cause of reduced life expectancy, asphalt is less resistant to UV or sunlight. In other words, the asphalt pavement is composed of asphalt binder, aggregate, stone powder and the like. However, the surface of the asphalt pavement is separated from the aggregate due to the oxidation of the asphalt binder by ultraviolet light.

 A typical example of this phenomenon is the fact that the surface of the asphalt pavement gradually changes from black to brown to gray. In addition, it can be seen that sand is deposited on the rough or low surface of the asphalt pavement.

This phenomenon causes the asphalt to be oxidized by UV rays and loses its flexibility. Flexibility is an important factor to sustain the load or maintain the elasticity of the asphalt pavement. The surface hardens and breaks down. If the asphalt surface is not protected, the rapid oxidation and hardening action occurs, which causes cracks on the asphalt pavement surface, which prevents water from penetrating and causes the weakening of the foundation by the infiltrated water. This will reduce the life of the pavement.

Therefore, in order to overcome this problem, there is an urgent need for preventive materials that can extend the life of pavement by blocking harmful substances by coating environmentally friendly rubberized asphalt seal coating material on the surface of asphalt pavement, which is not vulnerable to UV and rain. It is becoming.

Conventional pavement repair methods include pavement maintenance and asphalt resurfacing paving, which have been mostly applied to the pavement roads until the late 90s. It is a construction method that does not take into account the cost reduction of road repair and the speed of construction.

Epoxy crack repair agents require a long time and expertise for over 70 hours. In order to increase the permeability of micro cracks, they will lose their function due to decrease of adhesion due to increase of solvent amount. As for the progressive crack, there is a disadvantage that a new crack is generated in the vicinity of the repair crack due to the lack of elasticity due to the deformation amount of the epoxy crack repairing agent of about 2%.

It is easy to open the traffic and easy to construct immediately after construction. However, due to the decrease of adhesion with the surface of the pavement, cracks are enlarged due to rain water or freezing and thawing, which may further damage the pavement layer. No new cracks occur and maintenance functions of pavement can not be demonstrated.

Since late 1990, the repair method using heated asphalt sealant (Hot-Melt sealant) has introduced a system of developed countries in foreign countries to reduce maintenance on pavement. Hot melt materials require professional workers and dedicated boiler machines with high levels of concern for hazardous substances (VOCs) in the atmosphere and experience in construction, thus affecting work efficiency and traffic congestion. Although it was imported and constructed in North America until recently, foreign manufacturing companies have provided confusion to domestic contractors by supplying a complex type of product that can be classified into cold, warm, and hot weather based on the annual average temperature of the region. The lack of specialized knowledge of the worrisome use may cause the adverse effect of maintenance savings.

Therefore, the problem to be solved by the present invention is to prevent the environmentally friendly preventive road to extend the life of the pavement by blocking the asphalt pavement, which is vulnerable to weather resistance, such as ultraviolet (UV) and rain, by coating the old pavement from harmful substances It is to provide an asphalt seal coating material for maintenance and construction methods using the same.

In order to solve the above problems, the present invention is an asphalt seal coating material composition for preventive maintenance of asphalt pavement, modified asphalt 30-50 modified with styrene-butadiene-styrene block copolymer (Styrene-Butadiene-Styrene Copolymer) Weight%, Synthetic Polymer 1-5%, Functional Adhesion Promoter 0.5-3%, UV Stabilizer 05.-3%, Surfactant 0.5-5%, Kaolin (China Clay) 5-10% %, 5-20% by weight of synthetic inorganic fillers, 1-5% by weight of fumed silica (Silicon Dioxide); And it provides an asphalt seal coating material composition for preventive maintenance characterized in that it comprises a balance of water.

In one embodiment of the present invention, the surfactant includes a cationic surfactant which is Fatty amines, Fatty diamines, Fatty imidazolines, Fatty amidoamines, fatty quarternary ammonium salts.

In one embodiment of the present invention, the chemical name of the functional adhesion promoter (Adhesion promoter) includes Fatty acid aminoamides.

In one exemplary embodiment, the UV stabilizer has the formula, chemical name include ^{2- (2 '-Hydroxy-5'} -methylphenyl) benzotriazole.

[Formula 1]

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Asphalt pavements harden and destroy the asphalt surface due to frequent traffic of vehicles and oxidation such as direct sunlight and rain. If the asphalt surface is not protected, the rapid oxidation and hardening action occurs, which causes cracks on the asphalt pavement surface, which prevents water from penetrating and causes the weakening of the foundation by the infiltrated water. In the end, it is a major source of damage to the asphalt pavement.

However, according to the asphalt seal coating material and the construction method using the same for the preventive maintenance of the present invention, modified asphalt by applying other special additives to modified asphalt (PG 76-22) modified with styrene-butadiene-styrene block copolymer A mixture is developed and titrated by addition of a cationic surfactant (nitrogen-based cationic surfactant) so that this asphalt mixture can be applied at room temperature without heating to disperse the uniformly modified asphalt mixture in continuous water in particulate form.

Re-disperse fine powder reinforcements such as synthetic mineral fillers in modified asphalt mixture emulsions with excellent heat resistance, adhesion, low temperature flexibility and temperature sensitivity, and apply spray guns or straws such as emulsion spreaders to the surface of aging pavements It is a technique that can contribute to life extension by regenerating the surface of aging pavement.

In addition, the maximum effect of seal coating on asphalt pavement is to prevent water from invading from the pavement surface and to prevent oxidation by ultraviolet rays. It is prevented from being destroyed and changed into brittle state by the oxidation of asphalt by ultraviolet rays, which serves to prevent the surface of the asphalt pavement from being broken and leaving the aggregate on the surface. This can prevent the potholes (the holes in the asphalt's surface) and slow down the need for overlay. Therefore, pavement road maintenance costs can be reduced.

In addition, it can be easily installed on existing asphalt pavement, and the construction cost can also be installed at low cost if there is no special pretreatment work.

1 and 2 is a method of manufacturing an asphalt seal coating material for preventive maintenance according to an embodiment of the present invention and a construction method step using the same.

Hereinafter, the present invention will be described in detail with reference to the drawings. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like numbers refer to like elements throughout. In addition, abbreviations displayed throughout this specification should be interpreted to the extent that they are known and used in the art unless otherwise indicated herein.

Asphalt seal coating material for preventive maintenance according to an embodiment of the present invention comprises (a) modified asphalt mixture, (b) emulsified water, (c) fine powder reinforcement mixture, the description of each composition Is as follows.

(A) modified asphalt mixture according to an embodiment of the present invention is modified asphalt (PG 76-22) modified with styrene-butadiene-styrene block copolymer (PG 76-22), functional adhesion promoter (Adhesion promoter) , UV stabilizers and the like.

Modified asphalt (PG 76-22) modified with styrene-butadiene-styrene copolymer described above has the effect of increasing the elasticity and elongation of the asphalt seal coating material compared to general asphalt (AP-5) An increase in elasticity can significantly improve the deformation at high temperature, and an elongation can remarkably improve cracking and breakage due to an external impact.

The content of modified asphalt (PG 76-22) modified with styrene-butadiene-styrene block copolymer (PG 76-22) included in the composition of the present invention is preferably 30-50% by weight, and less than 30% by weight. If the back content is too small, it leads to poor adhesion, and if it exceeds 50% by weight, the strength and adhesion increase, but the low temperature brittleness increases and the heat resistance tends to deteriorate. It causes difficulty in doing so.

Adhesion promoter to increase the adhesion to the surface of the pavement used in the asphalt seal coating material composition for the preventive maintenance of the present invention was applied to the polarity between the polarity of the object and non-polar asphalt It acts as an adhesion promoter, increasing adhesion to the surface of asphalt pavements.

The content of the functional adhesion promoter is 0.5-3% by weight. If the content of the functional adhesion promoter is less than 0.5% by weight, adhesion promoting effect is hardly obtained. If the content of the functional adhesion promoter is more than 3% by weight, the elasticity and elongation of the asphalt deteriorate.

In addition, UV stabilizers are added to prevent oxidation by ultraviolet light on the asphalt pavement.

The UV stabilizer has the formula, Chemical name was applied to the ^{2- (2 '-Hydroxy-5'} -methylphenyl) benzotriazole

[Formula 1]

Oxidation by ultraviolet (UV) light causes the incident light to be reflected off the surface or scattered or absorbed into the polymer. According to the first law of photochemistry (grottus-draper), a part of the light that is effectively absorbed causes photochemical deformation, or degradation.

 In the presence of double bonds (chromophores) this absorption is transferred towards longer wavelengths. This is especially true for double bonds between carbon and other atoms, and carbonyl compounds already absorb at wavelengths above 290 nm. Degradation is caused by small amounts of impurities or structural irregularities in the gymnastics process and is often present in the polymer as catalyst residues, oxides, and the like. Irregular structures can exhibit absorption in the ultraviolet range, which can cause photochemical deformation.

Thus, the function of the UV stabilizer is to take over the energy absorbed by the Chromophores (K) present in the polymer and to extinguish the energy by heat, fluorescence or phosphorescent radiation to effectively prevent degradation.

The UV stabilizer is ^{2- (2 '-Hydroxy-5'} -methylphenyl) benzotriazole content is preferably 0.5-3% by weight.

Unlike conventional pavement repairs, it contains water to develop environmentally friendly products that can be applied at room temperature without the generation of pollutants such as VOCs (volatile organic compounds). Can reduce the cost.

In addition, it can be easily installed on existing asphalt pavement and construction costs can also be installed at low cost if there is no special pretreatment work.

  Referring to (b) emulsified water according to an embodiment of the present invention.

In asphalt seal coatings for preventive maintenance, water is preferred to use purified or deionized water, but common water, for example tap water or ground water, contains chemical ions, which may have beneficial or detrimental effects on stable asphalt seal coatings. Can cause.

For example, the presence of calcium and magnesium ions in water is beneficial for stable cationic asphalt seal coating material compositions (improving storage stability). However, the presence of carbonate or bicarbonate ions in water can be detrimental to stable cationic asphalt seal coating compositions (more insoluble salts are usually in crystalline form due to reaction with water-soluble amine hydrochlorides used as cationic emulsifiers). do).

The water content of the asphalt seal coating material composition of the present invention is preferably 30 to 60% by weight. This means that if the water content is less than 30% by weight, (a) it is difficult to disperse the modified asphalt mixture in the form of particulates in continuous water, which makes it difficult to achieve its intended purpose, and if it exceeds 60% by weight, the modified asphalt mixture contains particulates in continuous water. After dispersing in the form, when the water is evaporated in the field, the property as asphalt seal coating material is released. In this process, the volume decreases as much as the volume of water, that is, shrinkage, and the content of water is too excessive to slow down the curing rate. It may cause delay in construction time.

Asphalt seal coating material composition according to the present invention (a) It is preferable to add 0.3-3% by weight of surfactant to water in order to disperse the modified asphalt mixture in the form of uniform particulates in a continuous water.

Moreover, the surfactant structure which comprises this invention is a surfactant part (hydrophilic (polar)) which melt | dissolves in surfactant part (lipophilic (nonpolar)), hydrophilic, or another polar liquid which melt | dissolves in asphalt.

The cationic surfactant is an emulsifier prepared to emulsify the modified asphalt mixture in the form of fine particles on water. The component is Fatty quarternary ammonium salts, which is insoluble in water, and thus has an acidic solution (eg, hydrochloric acid (HCl). ), Phosphoric acid (H ₃ PO ₄ ), acetic acid (CH ₃ COOH), etc.) makes hydrophilic, so the asphalt seal coating material has a cation.

The structure and molecular structure of the surfactant are as follows.

[Surfactant Structure 1]

Molecular Structure of Surfactant 2

Emulsion types of cationic surfactants take the form of asphalt films that quickly cure and are very sticky regardless of moisture in the atmosphere. Some excess acid is used as the organic base in the production of cationic asphalt seal coating materials. This excess acid is present in the water and the asphalt seal coating material is cationic.

In the present invention, a pH of 2-4 is preferable, and when the pH is more than 4, the amount of acid to react with the insoluble emulsifier is small, so that the surfactant is not water-soluble, which makes it difficult to disperse the asphalt mixture in the form of fine particles in continuous water. If the modified asphalt mixture is dispersed in water in the form of fine particles, the reverse reaction between the water phase and the fine particles causes flocculation or coalescence between the water phase and the water quickly. It may cause stability problems.

In addition, it is preferable to add 1 to 10% by weight of a synthetic polymer emulsion to the asphalt seal coating material composition of the present invention in order to improve adhesiveness, low temperature flexibility, and heat resistance. SB latex (styrene-butadiene Latex) was used as the synthetic polymer emulsion.

The reinforcing material mixture of (c) fine powder according to one embodiment of the present invention is 10-30% by weight of water, 0.5-3% by weight of surfactant, 5-10% by weight of Kaolin (China Clay), 5-20% by weight of synthetic inorganic filler. , 1-5% by weight of fumed silica (Fumed Silica, Silicon Dioxide) is added to the mixture at 20-40 ℃, and adding an acid, the step of mixing so that the pH is 2-4.

The reinforcement mixture of (c) fine powder is used as an additive to improve the physical properties of (d) modified asphalt mixture emulsion (a) modified asphalt mixture and (b) emulsified water using Colloid Mill.

Kaolin (China Clay) in which the fine powder constitutes the reinforcement mixture is dispersed between the asphalt and the functional additive, so that the water of the asphalt seal coating material increases physical strength and resistance to friction.

In addition, Kaolin (China Clay) has plasticity when mixed with water, which makes it possible to shape the pressure freely and maintains its shape even when the pressure is removed. Mixing more water gives a thick, thin suspension.

Thus, the amount of water needed to have plasticity and viscosity depends on the size of the kaolinite particles and on the chemicals that may be present in the kaolin.

Synthetic inorganic filler constituting the (c) fine powder reinforcement mixture was applied to the hard calcium carbonate coated with a fatty acid to the surface (d) to improve the dispersion force when dispersed in the modified asphalt mixture emulsion. The production process of high purity synthetic light calcium carbonate as a synthetic mineral filler is as follows.

[Carbonization Process Reaction Formula 3]

CaCO ₃ (lime) → CaO + CO ₂ ↑

CaO + H ₂ O → Ca (OH) ₂

Ca (OH) ₂ + CO ₂ → CaCO ₃ (high purity synthetic light calcium carbonate)

Fumed Silica constituting the reinforcement mixture of the fine powder (c) is prepared in a gas phase reaction at a high temperature. It is produced by hydrolysis of silane chloride in a flame of 1000 ° C or higher formed of oxygen and hydrogen.

[Chloride silane production reaction]

Meatal silicon (Si) + 4HCl → SiCl ₄ + 2H ₂

[Fumed Silica Formation Reaction]

2H ₂ + O _{2 +} SiCl ₄ → SiO ₂ (Fumed silica) + 4HCl

Fumed Silica is characterized by its very light powder, amorphous silicon dioxide. The basic particle size is nanosized, extremely small, spherical, with a large surface area and distinctive surface properties. In addition, it improves tensile strength, elongation at break, tear strength, gives thickening and thixotropy, improves flow stability and prevents sedimentation of reinforcement of other fine powders and improves storage stability.

Asphalt seal coating material composition for the preventive maintenance of the present invention can be prepared in batch or continuous in the order of impeller mixer, Colloid Mill, it is preferable to use the continuous to obtain a more stable and uniformly dispersed composition Do.

1 is a step diagram of a method for producing an asphalt seal coating material composition for preventive maintenance according to an embodiment of the present invention.

Referring to Figure 1, the method comprises: (a) preparing a modified asphalt mixture; (b) an emulsifying water producing step; (c) preparing a reinforcing material mixture of fines; (d) preparing a modified asphalt mixture emulsion using (a) modified asphalt mixture and (b) emulsified water using a Colloid Mill; (e) (d) Modified asphalt mixture emulsion (c) Fine reinforcement mixture is added to the asphalt seal coating material manufacturing step for the preventive maintenance using the Colloid Mill.

In addition, the present invention comprises the steps of removing foreign matter, such as dirt, surface of the old pavement; Coating a 0.3-0.45 liter (L) per square meter (m2) by applying a spray gun or a straw, such as an emulsion sprayer, to the surface of an aging pavement. Provides the construction method used.

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Asphalt seal coating material and the construction method using the same for the preventive maintenance of the present invention is applied to the surface of the aging pavement by applying a spray gun or a straw, such as an emulsion sprayer to prevent the intrusion of water, oxidation by ultraviolet rays By preventing the regeneration of the surface of the aging pavement is a technology that can contribute to extending the life.

In addition, unlike conventional repairing pavement roads, water is included to develop environmentally friendly products that can be applied at room temperature without generating pollutants such as VOCs (volatile organic compounds), and thus do not use special equipment. As a result, disclosure costs can be reduced.

In addition, it can be easily installed on existing asphalt pavement and construction costs can also be installed at low cost if there is no special pretreatment work.

Hereinafter will be described in detail the asphalt seal coating material composition for the preventive maintenance of the present invention. However, the present invention is not limited to the following examples.

Example 1.
(The weight percentages described in the steps below are based on the total weight of the asphalt seal coating material, the final product.)

(a) preparing a modified asphalt mixture;

A functional adhesion promoter was added to 36.8% by weight of modified asphalt (PG 76-22, SK energy) modified with styrene-butadiene-styrene block copolymer having a softening point of about 75 ° C. and a penetration of about 65 dmm. Adhesion promoter, RASCHIG GmbH, RALUFON 300K) 1.2% by weight and UV stabilizer (SONGSORB 1000) 2% by weight were added and stirred at 150 ° C for 1hr at a stirring speed of about 300rpm. The temperature was kept at ℃.

(b) an emulsifying water producing step;

To 24% by weight of water containing no impurities, 1.5% by weight of Fatty quarternary ammonium salts-based surfactant (RASCHIG GmbH, RALUFON 528) and 4.5% by weight of synthetic polymer emulsion (BASF Corporation, Butonal NS 198) were added and mixed at 40 ° C. Preparing with stirring; Acid (HCl (35%) is added to bring the pH to 2-4.

(c) preparing a reinforcing material mixture of fines;

Fatty quarternary ammonium salts surfactants (RASCHIG GmbH, RALUFON 528) 0.9% by weight, 3% by weight Kaolin (China Clay), synthetic calcium carbonate (SHIRAISHI KOGYO KAISHA., LTD, HAKUENKA CCR) 10.5% by weight, fumed silica (Fumed Silica, Silicon Dioxide, Inc., OCI, K-150D) by adding 1.5% by weight to prepare a mixture (dispersion) at 30 ℃; Acid (HCl (35%) is added to bring the pH to 2-4.

(d) an emulsification step;

40% by weight of the modified asphalt mixture (a) maintained at 120 ° C. was added to a small amount of 30% by weight of the emulsified water (b) maintained at 40 ° C. using a colloid mill, followed by stirring for 30 minutes. The dispersed asphalt mixture was dispersed in the form of fine particles in a continuous water to prepare an modified asphalt mixture emulsion.

(e) manufacturing asphalt seal coating material for preventive maintenance;

In the modified asphalt mixture emulsion (d), a fine and stable asphalt seal coating material was prepared using a colloid mill of the reinforcing material mixture (c).

Example 2.

Softening point of about 75 ℃, penetration of about 65dmm, styrene-butadiene-styrene block copolymer modified with modified asphalt (PG 76-22, SK energy), softening point of about 42 ℃ Except for replacing about 50dmm asphalt (AP-5, SK energy) was prepared in the same manner as in Example 1.

Comparative Example 1

In Example 1. (a) Modified asphalt mixture was prepared in the same manner as in Example 1 except for replacing 1.2% by weight of the functional adhesion promoter (Adhesion promoter) with 0% by weight.

Comparative Example 2

In Example 1 (c) in the preparation of the reinforcing material mixture of fine powder 3% by weight of Kaolin, 10.5% by weight synthetic calcium carbonate, 1.5% by weight Fumed Silica to 0% by weight Kaolin, 15.5% by weight synthetic calcium carbonate, 0% by weight Fumed Silica It was prepared in the same manner as in Example 1 except for replacing.

Comparative Example 3

In Example 1. (a) In the preparation of modified asphalt mixture was prepared in the same manner as in Example 1. except that 2% by weight of UV stabilizer to 0% by weight.

Comparative Example 4

Asphalt seal coating material specification for preventive maintenance.

Solid content, ash, moisture resistance, heating resistance, impact resistance, flexibility, accelerated weather resistance, drying time and specific gravity of the asphalt seal coating material composition of Example 1-2 and Comparative Example 1-3 prepared by the above method are as follows. It measured together and the result is shown in the following table | surface.

Examples and Comparative Examples Measurement Method

1) Residue by Evaporation: ASTM D 2939

Ash Content: ASTM D 2939

3) Resistance to Water: ASTM D 2939

4) Resistance to Heat: ASTM D 2939

5) Resistance to Impact: ASTM D 2939

6) Flexibility: ASTM D 2939

7) Resistance to Impact After Accelerated Weathering: ASTM D 2939

8) Tack Drying Time, Specific Gravity: ASTM D 2939

9) Storage stability (time to start to settle solids)

Test Items Comparative Example 4 Example 1 Example 2 Comparative Example 1 Solid content (%) 47 or more 52 54 50 Ashes (%) 30 or more 40 43 40 Water resistance Not lifted or re-emulsified clear clear Re-emulsified Heating resistance Not to be lifted or dripping clear Run down Run down Impact resistance Not crack or break clear fracture clear flexibility Not crack or break clear fracture clear Accelerated weathering Not crack or break clear fracture clear Drying time (hr) 12 or less 6 6 6 importance 1.2 or higher 1.23 1.23 1.22 Storage stability - More than 12 weeks More than 12 weeks More than 12 weeks

Test Items Comparative Example 4 Comparative Example 2 Comparative Example 3 Remarks Solid content (%) 47 or more 52 53 Ashes (%) 30 or more 40 42 Water resistance Not lifted or re-emulsified Eluted clear Heating resistance Not to be lifted or dripping Run down Run down Impact resistance Not crack or break clear clear flexibility Not crack or break clear clear Accelerated weathering Not crack or break clear fracture Drying time (hr) 12 or less 6 6 importance 1.2 or higher 1.23 1.22 Storage stability - Settle after 3 days More than 12 weeks

As can be seen from the above experimental results, the asphalt seal coating material of Example 1 of the present invention is solid, ash, moisture resistance, heating resistance, impact resistance, flexibility, accelerated weather resistance, drying time, specific gravity, etc. are all satisfied with the standard value. I could confirm.

However, in Example 2, the heat resistance was lower than the standard value, causing a problem of flowing down at a high temperature. In Comparative Examples 1 and 2, the resistance to moisture and heating was lowered due to the decrease in adhesion of the fine particles on the continuous water, In Comparative Example 2, the phenomenon of precipitation in the solid door in a short period of time in storage stability occurred.

In addition, in Comparative Example 3, the asphalt seal coating material was oxidized and cracked in impact resistance after UV ray accelerated exposure due to no addition of the UV stabilizer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims (8)

Asphalt seal coating material composition for preventive maintenance, 30-50% by weight of modified asphalt modified with styrene-butadiene-styrene copolymer, 1-5% by weight of synthetic polymer, functional adhesive 0.5-3% by weight of Adhesion promoter, 0.5-3% by weight of UV stabilizer, 0.5-5% by weight of surfactant, 5-10% by weight of Kaolin (China Clay), 5-20% by weight of synthetic inorganic filler, fumed silica (Fumed Silica, Silicon Dioxide) 1-5% by weight; And balance water,
The UV stabilizer is an asphalt seal coating material composition, characterized in that represented by the following formula (1).
[Chemical Formula 1]

The asphalt seal coating composition according to claim 1, wherein the functional adhesion promoter is Fatty acid aminoamides.
The asphalt seal coating composition of claim 1, wherein the surfactant comprises at least one cationic surfactant selected from the group consisting of Fatty amines, Fatty diamines, Fatty imidazolines, Fatty amidoamines, and fatty quarternary ammonium salts.
The asphalt seal coating material composition of claim 3, wherein the fatty quarternary ammonium salts-based surfactant has a molecular structure in combination with an acid as follows.
[Molecular Structure of Surfactant]

The asphalt seal coating material composition of claim 1, wherein the synthetic inorganic filler comprises high purity synthetic hard calcium carbonate prepared by the following reaction formula.
[Carbonation reaction scheme]
CaCO ₃ (lime) → CaO + CO ₂ ↑
CaO + H ₂ O → Ca (OH) ₂
Ca (OH) ₂ + CO ₂ → CaCO ₃ (high purity synthetic light calcium carbonate)
The asphalt seal coating composition according to claim 1, wherein the fumed silica is produced in a gas phase reaction at a high temperature by the following reaction formula, and is produced by hydrolysis in a flame of 1000 ° C. or higher formed of oxygen and hydrogen.
[Chloride silane production reaction]
Meatal silicon (Si) + 4HCl → SiCl ₄ + 2H ₂
[Fumed Silica Formation Reaction]
2H ₂ + O _{2 +} SiCl ₄ → SiO ₂ (Fumed silica) + 4HCl
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