KR101395523B1 - One-component heating asphalt-based sealants for improving the durability of pavements and civil structures and construction method using the same - Google Patents

Abstract

The present invention relates to an one-pack type heating asphalt-based sealant for improving the durability of a pavement and a civil structure, and a construction method using the same and, more specifically, to an one-pack type heating asphalt-basted sealant for improving the durability of a pavement and a civil structure, which comprises 40-70 wt% of modified asphalt modified with a styrene-butadiene-styrene copolymer, 3-10 wt% of a thermoplastic elastomer (TPE), 1-10 wt% of a softener, 0.5-3.0 wt% of an adhesion promotor; 0.5-3.0 wt% of a UV stabilizer, 0.5-5.0 wt% of a density depressant, 5-10 wt% of a rubber powder, and 5-20 wt% of a fine reinforcement to have excellent heat resistance, weather resistance, adhesive, low-temperature flexibility, and temperature sensitivity, and a construction method using the same. The asphalt-based sealant is installed on a fracture of a pavement and a joint of a civil structure and blocks a toxic material to lengthen the life and obtain the adhesive and workability at not high temperature by the density depressant and the functional adhesion promoter to enable vehicle traffic immediately after construction to reduce the repairing times and costs, and protects the environment by recycling a rubber powder of a waste tire.

Description

Technical Field [0001] The present invention relates to a one-component type asphalt based sealant for improving the durability of pavement roads and civil engineering structures, and a construction method using the same.

The present invention relates to a one-pack type heating type asphalt type sealant for improving the durability of pavement roads and civil engineering structures, and a method of using the same. More particularly, the present invention relates to a method for improving the durability of pavement roads and civil engineering structures by using a styrene-butadiene-styrene block copolymer A thermoplastic elastomer (TPE), a functional adhesion promoter, a viscosity reducer, a rubber powder (Crumb Rubber) and a fine powder are added to the asphalt asphalt Resistant, asphalt-based sealant for improving durability by applying to pavement roads and civil engineering structures with excellent weather resistance, weather resistance, adhesive strength, low-temperature flexibility, and heat resistance, and 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 decrease in pavement life because the asphalt is not resistant to ultraviolet rays or sunlight, and the asphalt is oxidized by ultraviolet rays to lose its flexibility. Flexibility is an important factor for the asphalt pavement to withstand load or maintain elasticity. If it is lost, frequent passage of the vehicle and oxidizing action such as direct sunlight and storm cause cracking on the pavement. Such cracks cause water infiltration to be neglected, .

In general, asphalt / concrete pavement is microcracked due to contraction / expansion due to temperature change, rainwater penetrates into the generated cracks, causing partial settlement of the hearth layer, When cracks are formed in the hearth layer, cracks are formed in the form of cracks propagating to the existing pavement layer.

In order to overcome this problem, conventional pavement repair methods include pavement repair (asphalt pavement) and asphalt reclamation pavement method, which are mostly used until the late 90s. It is a repair method that does not consider the cost of repairing pavement 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.

Therefore, by injecting and installing an environmentally friendly one-component type asphalt-based sealant for improving durability on pavement with poor durability such as ultraviolet rays, temperature contraction / expansion, and excellent, it is applied at the point of occurrence of micro crack A preventive material is urgently required.

For example, Japanese Patent Laid-Open Publication No. 57-98559 discloses an asphalt containing an aromatic and / or naphthenic oil (or mineral oil) and a thermoplastic rubber as a rubber additive for asphalt reforming. The mineral oil gives a plasticizing effect to the asphalt, and the thermoplastic rubber increases the softening point and imparts toughness, but it has a disadvantage in that a large amount of rubber is required in order to improve mechanical strength such as compressive strength and tensile strength and recovery at the original state.

Japanese Unexamined Patent Publication (KOKAI) No. 57-139143 discloses a block copolymer (referred to as SBS, SIS, SEBS, etc.) composed of a conjugated diene and a vinyl aromatic hydrocarbon in a bitumen (i.e., asphalt) material, a stabilizer containing nitrogen and sulfur atoms in the molecule, A composition containing other stabilizers and radical polymerization inhibitors has been introduced.

In addition, U.S. Patent 4,485,201 discloses a process for preparing a blend of a powdery rubber and a styrene-butadiene block copolymer asphalt with a heat-resistant antioxidant, a tackifying agent, a plasticizer or a processing oil as a softener, To < RTI ID = 0.0 > 204 < / RTI >

This composition has high cohesion and adhesion at high temperature, high flexibility at high temperature and low temperature, excellent elasticity, and can be used as a crack sealer, a concrete joint sealer filler and a sealant of a building material .

However, the above product has a penetration (cone) of 60 or a flow (or softening point) of 60 to 20, and the roof waterproofing material of the building and the crack repairing agent of the road pavement have disadvantages such as flow and plastic deformation in summer, Of the wheels and pedestrian shoes.

Generally, the surface temperature of roads and rooftops in the summer season in Korea varies depending on the material and color but it can go up to over 60. In order to overcome these disadvantages, inorganic fillers are usually used, and stone and aggregate and fillers such as calcium carbonate, silica and talc are frequently used. The hardness, penetration, and softening point are increased, .

In addition, Korean Patent No. 0332632 discloses a rubber composition comprising (A) 6 to 40 parts of styrene-conjugated diene block copolymer, (B) 4 to 40 parts of waste tire rubber powder, (C) 0 to 100 parts of (D) a plasticizer or softening agent, (E) 0.02 to 5 parts of (E) a pressure sensitive adhesive, and (F) 5 to 100 parts of an inorganic filler.

Korean Patent No. 5,99586 discloses a crack repair agent prepared by polymerizing a monomer having a double bond in a molecule by using a silane compound as a solvent. Korean Patent Application No. 2001-0018526 and Korean Patent No. 0388810 Relates to an asphalt sealant composition.

However, in recent years, the above products have been increasingly aged in the pavement due to strong ultraviolet rays and long rainy seasons in the summer. However, since they do not mention physical property values against UV and water exposure, when the UV and water are exposed for a long time, And may further damage the pavement.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a heating type asphalt based sealant composition which overcomes the problems of the above-described conventional techniques and is excellent in weatherability, crack following property, low temperature flexibility, heat resistance, adhesiveness and temperature sensitivity, The application of thermoplastic elastomers, softeners, functional adhesion promoters, UV stabilizers, viscosity reducers, and rubber powders to modified asphalt modified with copolymers can be applied to areas with high temperature changes and high daily drift and long exposure to strong UV or rainy season moisture An asphalt crab sealant composition excellent in weather resistance, heat resistance, adhesiveness and low-temperature flexibility can be used, and the present invention has been completed on the basis thereof.

Accordingly, an object of the present invention is to provide a resin composition which satisfies the ASTM D 6690 type including weatherability, low temperature flexibility, adhesiveness, heat resistance, and temperature sensitivity applicable to domestic climate change and is excellent in durability against shrinkage / Environmentally friendly one-component type asphalt-based sealant for improving the durability that contributes to the extension of the life of the pavement by applying it at the point of micro crack at the beginning of the crack of the pavement by injecting and laying on the weak pavement .

In order to solve the above problems, the present invention provides a one-component type asphalt-based sealant composition for improving the durability of pavement roads and civil engineering structures, which comprises a modified styrene-butadiene-styrene block copolymer modified styrene- 40-70% by weight of arm, 3-10% by weight of TPE, 1-10% by weight of softener, 0.5-3% by weight of functional adhesion promoter, 0.5-3% by weight of UV stabilizer, 0.5-5% The present invention provides a one-pack type heated asphalt based sealant composition for improving the durability of a pavement and civil engineering structure, which comprises 5-10 wt% of a rubber powder and 5-20 wt% of a reinforcing material of a fine powder.

In one embodiment of the present invention, the chemical name of the functional adhesion promoter includes a cyclic alkylaminoamidine. In one embodiment of the present invention, the UV stabilizer comprises a compound of the formula:

[Chemical Formula 1]

In one embodiment of the present invention, the viscosity depressant comprises a viscosity lowering agent, which is the chemical name Paraffinic Hydrocarbons.

In one embodiment of the present invention, the rubber powder comprises a waste tire rubber powder.

(a) 1-10 wt% of a softener, 0.5-3 wt% of a functional adhesion promoter, 40-70 wt% of a modified asphal, modified with a styrene-butadiene-styrene copolymer, 0.5 to 3% by weight of a UV stabilizer, 0.5 to 5% by weight of a viscosity-decreasing agent, and mixing at a temperature of 140 to 170; And

(b) adding 3-10 wt% of TPE, 5-10 wt% of a rubber powder and 5-20 wt% of a fine powder to the mixture, and mixing at a temperature of 150-180. And one-component type asphalt-based sealant for improving the durability of pavement roads and civil engineering structures for improving the durability of civil engineering structures, and a construction method using the same.

Also, the present invention provides a method for manufacturing a cured product, the method comprising: forming a repair groove having a predetermined size on a pavement crack and a joint region using a single-component type heated asphalt-based sealant composition;

Removing foreign matters including dust or moisture from the repair grooves; And

40 to 70% by weight modified asphal, modified with styrene-butadiene-styrene copolymer, 3-10% by weight of TPE, 1-10% by weight of softener, functional adhesion promoter ( An asphalt-based sealant comprising 0.5-3% by weight of an adhesion promoter, 0.5-3% by weight of a UV stabilizer, 0.5-5% by weight of a viscosity-decreasing agent, 5-10% by weight of a rubber powder and 5-20% Sealing and filling of the sealant, and a method for manufacturing the sealant by using the single-component type asphalt sealant for improving the durability of the pavement and the civil engineering structure.

The heated asphalt-based sealant for improving the durability of the pavement of the present invention can be suitably applied to UV-stabilized materials such as ultraviolet (UV) and snow-removing agents, sea water, acid rain, etc. by suitable application of UV stabilizer, functional adhesion promoter and softening agent It is excellent, and it has excellent property of following cracking due to shrinkage / expansion due to temperature change of pavement road, it has physical properties satisfying ASTM D 6690 type and can contribute to prolongation of life by preventing cracking of pavement road.

In addition, the application of viscosity reducer and petroleum rubber powder can reduce the melting temperature of asphalt sealant to reduce the oil cost, shorten the transportation time after construction and construction time, reduce the construction cost and recycle waste tire rubber powder By securing a technique for obtaining an asphalt-based sealant composition having excellent physical properties, it can contribute to environmental protection.

FIGS. 1A and 1B are schematic views of a one-component type heating type asphalt sealant for improving the durability of a pavement and a civil engineering structure according to an embodiment of the present invention and a construction method using the same.
2 is a diagram illustrating a method of manufacturing a one-pack type heating type asphalt based sealant composition for improving the durability of pavement and civil engineering structures according to an embodiment of the present invention.
3 is a view for explaining an adhesion mechanism between an asphalt-based sealant and a pavement and a civil engineering structure.

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 reference numerals designate like elements throughout the specification. 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.

The one-pack type heating type asphalt sealant for improving the durability of the pavement and the civil engineering structure according to an embodiment of the present invention is formed by applying UV (ultraviolet ray) to the asphalt modified with a styrene-butadiene-styrene copolymer, Stabilizer, softening agent, thermoplastic elastomer (TPE), adhesion promoter, viscosity reducer, crumb rubber and fine powder reinforcement.

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 the modified asphalt (PG 76-22) modified with a styrene-butadiene-styrene copolymer contained in the composition of the present invention is preferably 40-70 wt%, more preferably 40 wt% If the content exceeds 70 wt%, the strength and the adhesive strength are increased but the low temperature brittleness is increased and the heat resistance is deteriorated.

The pavement used for the one-component type asphalt-based sealant composition for improving the durability of the pavement and the civil engineering structure of the present invention, and the functional adhesion promoter for enhancing the adhesive strength are obtained by applying a cyclic alkylaminoamidine Respectively.

3 is a view for explaining an adhesion mechanism between an asphalt-based sealant and a pavement and a civil engineering structure.

3, the functional adhesion promoter is dispersed in a non-polarized modified asphalt to impart a polarity to the modified asphalt, and the modified asphalt surface imparted with the polarity is transferred to the pavement and the electrostatic attraction The adhesion is promoted.

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, a UV stabilizer is added to prevent the oxidation of the heated asphalt sealant by ultraviolet rays.

The UV stabilizer is a compound represented by the following chemical formula 1 and a chemical name of 2- (2-Hydroxy-3,5-di (1,1-dimethylbenyl) phenyl] -2H-benzotriazole.

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[Chemical 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 content of 2- (2-Hydroxy-5-methylphenyl) benzotriazole in the UV stabilizer is preferably 0.5-3% by weight.

The heat-type asphalt-based sealant constituting the present invention includes a thermoplastic elastomer (TPE) to increase physical properties such as elasticity, heat resistance and elongation.

The thermoplastic elastomer (TEP) is mixed with asphalt to increase the elasticity and elongation of the heated asphalt-based sealant. The increase in elasticity causes a problem of deformation at a high temperature, Can be improved.

The content of the thermoplastic elastomer (TPE) is preferably 310 wt%. If the content of the thermoplastic elastomer (TPE) is less than 3% by weight, the elasticity and elongation of the composition hardly improve. If the content of the thermoplastic elastomer is more than 10% by weight, do.

In addition, conventionally used additives for improving the brittleness of asphalt include Bunker-C oil, dioctyl phthalate (DOP), tricresyl phosphate (TCP), paraffinic process oil, aromatic process oil or naphthan process oil Of a plasticizer.

When applied to a heated asphalt-based sealant composition, Bunker-C oil, dioctyl phthalate (DOP) and tricresyl phosphate (TCP) are inadequate because of their low temperature and heat resistance, and are not suitable for aromatic and naphthenic process oils Has a disadvantage of low temperature sensitivity due to a low viscosity index due to its excellent low temperature, and paraffinic process oil has a high viscosity index due to temperature, but has a low heat resistance.

Therefore, in the present invention, a softener which is a paraffinic synthetic oil is used instead of the above-mentioned conventional plasticizer. The softener is a hydrotereated lube base oil having a pour point of -40, a density of 0.8661, a kinematic viscosity index of 40, / S of 124.4, and a flash point of 276 or more.

When the softening agent is added to the heating type asphalt-based sealant composition of the present invention, the bonding at room temperature is maintained even in the summer, and the softening agent maintains flexibility at a low temperature in winter.

The amount of the softening agent to be added to the heated asphalt-based sealant composition of the present invention is preferably 1-15% by weight, and if it is less than 1% by weight, the addition effect is scarcely effected. If it exceeds 15% by weight, There is a tendency to oxidize roads.

The heat-resistant asphalt-based sealant constituting the present invention contains a viscosity-decreasing agent to ensure sufficient adhesion and workability at a temperature at which the melting temperature is not high when applied to a pavement.

The viscosity reducing agent is mixed with asphalt to lower the melting temperature of the heated asphalt type sealant and secures sufficient adhesion and workability even at the temperature so that it is possible to communicate the vehicle immediately after the construction so that traffic congestion can be reduced, Time and maintenance costs can be greatly reduced.

The content of the viscosity reducing agent is preferably from 0.5 to 5% by weight, and if the content of the viscosity reducing agent is less than 0.5% by weight, there is no effect of reducing the melting temperature of the composition, and if it exceeds 5% by weight,

The heat-resistant asphalt-based sealant composition of the present invention is required not only to have an increased softening point but also to increase its elasticity in order to prevent permanent deformation at high temperatures and cracking at low temperatures.

Accordingly, the heated asphalt based sealant composition of the present invention includes a rubber powder to increase the softening point, and uses a waste tire as an example of the rubber powder. As a result, the increase in the softening point of the composition prevents viscous flow characteristics from exhibiting a higher temperature even in the hot season. The use of rubber powder in this way also has the advantage of reducing the manufacturing cost of the heated asphalt-based sealant while reducing the environmental cost of the waste tire treatment.

The content of the rubber powder contained in the heated asphalt-based sealant composition of the present invention is preferably 510 wt%. If the content of the rubber powder is less than 5% by weight, the softening point and elasticity of the composition are insignificant, and it is difficult to achieve the desired purpose. If the content exceeds 10% by weight, the interfacial adhesion strength between the asphalt and the rubber powder is significantly lowered, The uniformity of the composition is lowered and the softening point and elasticity are lowered. In addition, the particle size of the rubber powder is preferably 40 mesh for homogeneous mixing of the composition.

The heating type asphalt based sealant composition according to the present invention is preferably added with an inorganic filler in an amount of 520 wt% in order to increase softening point and strength.

The reinforcing material of the fine powder was applied to a heated asphalt-based sealant composition and hard calcium carbonate coated with a fatty acid on the surface thereof was applied in order to increase dispersibility when dispersed. 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 + H2O - > Ca (OH) ₂

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

The heated asphalt-based sealant composition of the present invention can be manufactured regardless of the type and mixing order of the mixer such as an impeller mixer and a high-shear mixer. It is preferred to use a high shear or high viscosity mixer to obtain more uniformly dispersed compositions of each component and to mix them in a shorter time.

FIGS. 1A, 1B and 2 are schematic views of a one-component type heating type asphalt type sealant for improving the durability of a pavement and civil engineering structure according to an embodiment of the present invention and a construction method using the same. 1 is a diagram illustrating a method of manufacturing a one-pack type heating type asphalt sealant composition for improving the durability of pavement roads and civil engineering structures according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the method comprises the steps of (a) adding 40 to 70% by weight of a modified asphal, modified with a styrene-butadiene-styrene copolymer to 1 to 10% by weight of a softener, 0.5 to 3% by weight of an adhesion promoter, 0.5 to 3% by weight of a UV stabilizer, and 0.5 to 5% by weight of a viscosity-decreasing agent at a temperature of 140 to 170 캜; And

(b) adding 3-10 wt% of TPE, 5-10 wt% of rubber powder and 5-20 wt% of a fine powder to the mixture, and mixing the mixture at a temperature of 150-180 캜.

In the present invention, step (b) is treated at a higher temperature than step (a) in order to improve workability and productivity.

According to another aspect of the present invention, there is provided a method of manufacturing a semiconductor device, comprising: forming a repair groove having a predetermined size on a pavement crack and joint region; Dust, and moisture from the repair grooves; 40 to 70% by weight of modified asphalt modified with a styrene-butadiene-styrene copolymer, 3 to 10% by weight of TPE, 1 to 10% by weight of a softener, a functional adhesion promoter ( An asphalt-based sealant comprising 0.5-3% by weight of an adhesion promoter, 0.5-3% by weight of a UV stabilizer, 0.5-5% by weight of a viscosity-decreasing agent, 5-10% by weight of a rubber powder and 5-20% Sealing and filling of the sealant, and a method for manufacturing the sealant by using the single-component type asphalt sealant for improving the durability of the pavement and the civil engineering structure.

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The single-component type asphalt-based sealant for improving the durability of the pavement and the civil engineering structure of the present invention and the method of using the same are excellent in durability against alkali and acid such as ultraviolet (UV) caused by sunlight and snow remover, seawater and acid rain It has excellent properties to follow ASTM D 6690 type due to excellent followability of cracks due to shrinkage / expansion due to temperature change of pavement road, and it can contribute to prolongation of life by preventing expansion of cracks in pavement roads.

In addition, by reducing the melting temperature of the asphaltic sealant to reduce the oil cost, reducing the construction cost by shortening the construction time and transportation time after construction, and recycling waste tire rubber powder as the waste resource, the pavement and civil structure durability The present invention can contribute to environmental protection by securing a technique for obtaining a one-pack type heated asphalt based sealant composition for improvement.

Hereinafter, the one-pack type heating type asphalt based sealant composition for improving the durability of the pavement and civil engineering structures of the present invention will be described in detail. However, the present invention is not limited to the following examples.

Example 1.

Preparing a heated asphalt sealant;

(a) 62% by weight of a modified asphalt (PG 76-22, SK Energy) modified with a styrene-butadiene-styrene copolymer having a softening point of about 75 and an invasion degree of about 65 dmm, 3% by weight of a UV stabilizer (SONGSORB 2340), 5% by weight of a softening agent (SK Rubotech, P-200), a viscosity reducing agent (Sonneborn, Inc., WONNEWARMIX) was added and the mixture was stirred at a temperature of 150 ° C for about 1 hour with stirring at a stirring speed of about 300 rpm to make it uniform;

(b) 10 wt% of TPE (KKPC-301P), 5 wt% of waste tire rubber powder (Criotec, 40mesh) and a reinforcing material of a fine powder (SHIRAISHI KOGYO KAISHA., LTD, HAKUENKA CCR ) Was added thereto, and the mixture was stirred at a temperature of 180 캜 for about 3 hours at a stirring speed of about 600 rpm, followed by mixing / dispersing.

Comparative Example 1

Example 1 was prepared in the same manner as in Example 1 except that (a) 2 wt% of a functional adhesion promoter was replaced by 0 wt% in the production of a heated asphalt-type sealant.

Comparative Example 2

Except that 3% by weight of a UV stabilizer (SONGSORB 2340) was replaced with 3% by weight of an antioxidant (SONGNOX 21B, Songwon Industrial Co., Ltd.) in the production of a heating type asphalt sealant in Example 1 The title compound was prepared in the same manner as in Example 1.

Comparative Example 3

Example 1 was prepared in the same manner as in Example 1 except that (a) 2 wt% of a viscosity reducing agent (Sonneborn, Inc, WONNEWARMIX) was replaced with 0 wt% in the production of a heated asphalt sealant.

Reference value.

One - component type heated asphalt sealant specification value to improve durability of pavement and civil engineering structure. (ASTM D 6690 Type)

The one-component type asphalt-based sealant composition for improving the durability of pavement roads and civil engineering structures of Example 1 and Comparative Example 1-3 prepared as described above was measured as follows, and the results are shown in the following table.

Examples and Comparative Examples Measurement Method

1) Cone penetration ((1 / 10mm), 25 (77), 150g, 5 sec): ASTM D 6690

2) Original recovery rate (%, 25, 75 g): ASTM D 6690

3) Flowability ((mm), 60, 5 hr): ASTM D 6690

4) Softening Point (): ASTM D 6690

5) Asphalt compatibility (60, 72 hours): ASTM D 6690

6) Low temperature adhesion (-29, 50% elongation, 3 cycles): ASTM D 6690

7) Recovery rate ((%), 25, 75g) after Oven Aged (70,168hr): ASTM D 6690

8) After soaking (96 hours) Low temperature adhesion (-29, 50% elongation, 3 cycles): ASTM D 6690

9) Adhesion elongation (%, 25, at break): ASTM D 5329

10) Viscosity (cps, 170)

11) Accelerated weathering resistance (Xenon, 300 hr): ASTM C 793

   - Black panel temperature: 63

   - Relative humidity: 50%

   - Spray cycle: 120 minutes, 18 minutes after irradiation and water spray

- Radiance: 0.51 W / (340 nm)

The result value. Test Items Reference value Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Cone penetration (dmm) 90 or less 52 55 53 55 Original recovery rate (%) 60 or more 64 62 65 62 After soaking
Original recovery rate (%) 60 or more 65 62 50 62 Flow (mm) 3 or less 0 0 0 0 Softening point () 83 or more 98 98 99 99 Low temperature adhesion No cracking or separation clear clear clear clear After soaking
Low temperature adhesion No cracking or separation clear Interface separation Interface separation clear Asphalt compatibility Oil spill and harmful factors should not occur clear clear clear clear Adhesive Elongation Ratio - 750 600 740 760 Viscosity - 20,000 20,000 20,000 30,000 Promotion
Weatherability transform No more clear clear transform occur clear Exfoliation No more clear clear Peeling occurred clear Low temperature adhesion No cracking or separation clear clear Cracking clear

Compared with Comparative Example 1, Example 1 showed excellent resistance to water and adhesion elongation, and no problem in adhesive strength.

In comparison with Comparative Example 2 in which a UV stabilizer according to the prior art was added, Example 1, in which the UV additive according to the present invention was added, exhibited a phenomenon in which deformation, peeling, and low temperature adhesive adherent sealant were oxidized and broken after exposure to UV rays And there was no problem in adhesion.

In addition, the viscosity of Example 2 was lower than that of Comparative Example 3 because of the addition of a viscosity decreasing agent. This is because the lowering of the melting temperature of the heated asphalt-based sealant reduces the fuel cost and the construction time, It can be a factor to save.

As can be seen from the above-mentioned experimental results, the one-component type asphalt based sealant for improving the durability of the pavement road and the civil engineering structure of Example 1 of the present invention is characterized in that the cone penetration, the recovery rate of the original shape, the flowability, the softening point, The results of this study are as follows: (1) The recovery rate, the low temperature adhesiveness after adhesion, the adhesion elongation, the viscosity, the accelerated weathering resistance, etc.

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 (7)

A one-component type asphalt-based sealant composition for improving the durability of pavement roads and civil engineering structures,
40 to 70% by weight of modified asphalt modified with a styrene-butadiene-styrene copolymer, 3 to 10% by weight of a thermoplastic elastomer, 1 to 10% by weight of a softener, a functional adhesion promoter ( 0.5 to 3% by weight of a UV stabilizer, 0.5 to 5% by weight of a viscosity-decreasing agent, 5 to 10% by weight of a rubber powder and 5 to 20% by weight of a reinforcing agent of a fine powder,
Wherein the UV stabilizer has the following formula: < RTI ID = 0.0 > 1 < / RTI >
[Chemical Formula 1]

The one-part heat type asphalt based sealant composition according to claim 1, wherein the adhesion promoter is a cyclic alkylaminoamidine. The one-part type heating type asphalt based sealant composition according to claim 1, wherein the viscosity reducing agent is a paraffinic hydrocarbon. The method of claim 1, wherein the functional adhesion promoter is dispersed in a non-polarized modified asphalt to impart polarity to the modified asphalt, and the modified asphalt surface imparted with polarity has an electrostatic attraction Wherein the adhesive is promoted by the heat-resistant asphalt-based sealant composition. The one-part heating type asphalt based sealant composition according to claim 1, wherein the reinforcing material of the fine powder comprises calcium carbonate. (a) 1-10 wt% of a softener, 0.5-3 wt% of a functional adhesion promoter, 40-70 wt% of a modified asphalt modified with a styrene-butadiene-styrene copolymer, 0.5 to 3% by weight of a UV stabilizer, 0.5 to 5% by weight of a viscosity-decreasing agent, and mixing at a temperature of 140 to 170 캜; And
(b) adding 3-10% by weight of a thermoplastic elastomer, 5-10% by weight of a rubber powder and 5-20% by weight of a reinforcing agent of a fine powder to the mixture, and mixing the mixture at a temperature of 150-180 캜 And a method of using the single-component type asphalt-based sealant. Forming a repair groove having a predetermined size on a pavement crack and joint region by using the one-pack type heated asphalt-based sealant composition prepared in Claim 6;
Removing foreign matter including moisture or dust from the repair groove; And
40 to 70% by weight of modified asphalt modified with a styrene-butadiene-styrene copolymer, 3 to 10% by weight of a thermoplastic elastomer, 1 to 10% by weight of a softener, An asphalt-based composition comprising 0.5-3% by weight of a functional adhesion promoter, 0.5-3% by weight of a UV stabilizer, 0.5-5% by weight of a viscosity reducer, 5-10% by weight of a rubber powder and 5-20% And sealing and filling the sealant. The one-component type asphalt-based sealant for improving the durability of pavement and civil engineering structures, and a method of using the same.

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