KR101743397B1 - Thermoplastic elastomer composition for crack sealing and maintenance and repair method of paved road using the same - Google Patents

Abstract

One aspect of the present invention relates to a thermoplastic elastomer composition comprising 100 parts by weight of a thermoplastic elastomer (A); 10 to 50 parts by weight of a tacky resin (B); 10 to 50 parts by weight of glass fiber (C); And 80 to 120 parts by weight of an inorganic filler (D), wherein the glass fiber is a chopped fiber having a length of 2 mm to 8 mm and a cross-section diameter of 30 to 150 탆 . INDUSTRIAL APPLICABILITY The thermoplastic elastomer composition for crack repair according to the present invention is excellent in strength, durability and weatherability, and the maintenance method of the road pavement using the thermoplastic elastomer composition for crack repair is easy to apply and the construction time can be shortened Provides an effect.

Description

TECHNICAL FIELD [0001] The present invention relates to a thermoplastic elastomer composition for crack repair, and a maintenance method for repairing road pavement using the same. BACKGROUND ART [0002]

TECHNICAL FIELD The present invention relates to a thermoplastic elastomer composition for crack repair and a maintenance method of road pavement using the same, more specifically, to a method of repairing cracks, pot holes, joint damage, To a thermoplastic elastomer composition capable of easily repairing a required construction site within a short time, and a maintenance method of road pavement using the same.

Generally, road pavement can be divided into concrete pavement and asphalt pavement. Concrete, asphalt, etc., the ultraviolet rays change the physical properties of the surface gradually from soft to hard, and cracks occur due to the increase in the number of vehicles driving on the road and the aging of the roads. This road surface accelerates crack progression due to changes in temperature and precipitation due to seasonal changes.

The types of cracks in road pavement include cracks such as turtle cracks in the longitudinal direction cracks and transverse cracks in the initial cracks, and bituminous materials such as asphalt and packing tar on the cracks generated in the aging of the asphalt roads, And a pot hole in which a deep hole is formed in the upper ground due to a crevice in the concaved or broken part of the bed rock bed, and the like.

Road pavement repeats expansion and contraction according to temperature and humidity, so joints are applied to reduce the stress generated in the pavement slab and to prevent the occurrence of cracks.

In the case where the packing slab is inflated with the incompressible material inserted into the line of eyes, damage such as flaring occurs frequently due to repeated expansion and contraction of the packing slab in the eye part of the road pavement, Can be made larger. This damage is not limited to the line eye, but also to the internal damage of the packing slab adjacent to the line eye.

Therefore, in the case of damage to the eye of the road pavement, it is necessary to quickly repair the damaged part by removing the damaged part and constructing a new package on the part.

On the other hand, in order to obtain the road pavement excellent in strength and durability through maintenance of the road pavement, it is required that the bonding between the existing pavement and the newly constructed pavement is robust after removing the damaged portion. It is required that the existing pavement surface has a strength higher than a certain level.

If the removal of the damaged portion is not performed properly and the existing pavement after the removing operation does not have sufficient strength, even if the pavement having excellent strength is applied on the pavement, the bonding strength is insufficient and a good quality pavement slab can not be obtained .

Conventionally, a damaged joint portion is uniformly crushed by a crusher, and a new crushing surface is applied to the crushed surface. However, this uniform crushing operation causes a problem that a new crack is caused on the existing pavement surface.

There are heating and mixing type, room temperature mixing type, heating type and so on. The heating and mixing method is a method of heating and mixing joint repair materials and crack repair materials. Asphalt and polymer resin are mixed by heating and used as joints or melted bronze asphalt. The mixture at room temperature is mixed at room temperature. It uses joints made of a mixture of water-based asphalt, latex and elastic material. It has a disadvantage that it is easily aged and has poor durability due to its low adhesive strength. In addition, the room temperature mixing method has a disadvantage in that the curing time and the curing time are prolonged after the repair of cracks.

The heating type is advantageous in that it can pass immediately when the temperature drops to room temperature after installation. It does not use chemical substance called diluting material because it does not use chemical substance by melting it by heating without mixing raw material with dilution material etc. It is environment-friendly and can express various colors, It is advantageous that the maintenance site is not conspicuous.

A problem to be solved by the present invention is to provide a thermoplastic elastomer composition for repairing cracks excellent in strength and durability.

Another object of the present invention is to provide a thermoplastic elastomer composition for crack repair having excellent weather resistance.

Another object of the present invention is to provide a maintenance method of a road pavement which is easy to construct and can significantly shorten the construction time compared to the conventional method.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the present invention relates to a thermoplastic elastomer composition comprising 100 parts by weight of a thermoplastic elastomer (A); 10 to 50 parts by weight of a tacky resin (B); 10 to 50 parts by weight of glass fiber (C); And 80 to 120 parts by weight of an inorganic filler (D), wherein the glass fiber (C) is a chopped fiber having a length of 2 mm to 8 mm and a cross-sectional diameter of 30 to 150 탆, the thermoplastic elastomer composition .

Wherein the thermoplastic elastomer composition further comprises an asphalt binder (E) in an amount of 50 to 80 parts by weight based on 100 parts by weight of the thermoplastic elastomer (A), wherein the thermoplastic elastomer (A) is one or more kinds selected from a styrenic thermoplastic elastomer and an olefinic thermoplastic elastomer Wherein the styrene-based thermoplastic elastomer is poly (styrene-butadiene-styrene) (SBS), the olefinic thermoplastic elastomer is an ethylene vinyl acetate copolymer, the adhesive resin (B) is a C5- Wherein the inorganic filler (D) is at least one selected from the group consisting of a resin, a rosin resin, a polybutene, a naphthene process oil, and a rosin modified resin, wherein the inorganic filler (D) is at least one selected from the group consisting of calcium carbonate, calcium carbonate, silica, kaolin, montmorillonite, Fried ash, and quicklime.

According to another aspect of the present invention, there is provided a cutting method comprising: a cutting step of cutting a construction site to a predetermined depth and width; A foreign matter removing step; Primer application step; And forming a seal layer, wherein the step of forming the seal layer includes the steps of laying a thermoplastic elastomer composition for crack repair at a predetermined thickness on the application site, placing an aggregate on the thermoplastic elastomer composition And a planarization step of heating and compressing by heating iron.

The forming of the seal layer may include forming a first seal layer; And forming a second seal layer on the first seal layer, wherein the step of forming the first seal layer includes the steps of first laying a thermoplastic elastomer composition for repairing cracks with a predetermined thickness on a construction site coated with a primer , A step of laying a large aggregate on the first thermoplastic elastomer composition laid first, and a flattening step of first heating and pressing with a heating iron, wherein the step of forming the second seal layer comprises the step of forming a thermoplastic elastomer composition A step of laying a car, a step of laying a small aggregate on the secondarily laid thermoplastic elastomer composition, and a second step of heating and compressing with a heating iron.

The heating iron includes a hot plate and a handle formed on the upper surface of the heating plate, wherein the heating plate is a plate-shaped and made of a metal material containing copper or magnesium, and the temperature of the heating plate may be 150 to 190 ° C have.

The fine aggregate and the large aggregate are heated and dried at a temperature of 75 ° C to 120 ° C, and then supplied to the thermoplastic elastomer composition for crack repair. The large aggregate is crushed in a crusher at a size of 0.5 to 1 mesh And the aggregate is suspended from the crusher to a size of 16 to 30 mesh, and then the aggregate is used.

The amount of the large aggregate to be installed and the volume ratio of the primary installation amount of the thermoplastic elastomer composition for repairing cracks may be 1: 3 to 1: 5.

The height of the second seal layer and the height of the first seal layer may be 1: 2 to 1: 3.

INDUSTRIAL APPLICABILITY The thermoplastic elastomer composition for crack repair according to the present invention is excellent in strength, durability and weatherability, and the maintenance method of the road pavement using the thermoplastic elastomer composition for crack repair is easy to apply and the construction time can be shortened Provides an effect.

Fig. 1 shows a construction site on road pavement requiring repair.
2 shows a cutting step S1 in the maintenance method of road pavement according to one embodiment of the present invention.
FIG. 3 shows a foreign matter removal step (S2) in the maintenance method of road pavement according to one embodiment of the present invention.
FIG. 4 shows a primer application step (S3) in the maintenance method of road pavement according to one embodiment of the present invention.
5 is a view showing a step S4 of forming a first seal layer in the maintenance method of road pavement according to one embodiment of the present invention.
FIG. 6 is a view showing a step S5 of forming a second seal layer in the maintenance method of road pavement according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, the present invention will be described more specifically.

Thermoplastic elastomer composition for crack repair

The thermoplastic elastomer composition for crack repair according to an embodiment of the present invention (hereinafter referred to as a thermoplastic elastomer composition) may include a thermoplastic elastomer (A), a viscous resin (B), a glass fiber (C) and an inorganic filler .

The thermoplastic elastomer (A) may include at least one of a styrene-based thermoplastic elastomer and an olefin-based thermoplastic elastomer.

The styrenic thermoplastic elastomer is known as the elastomer closest to the rubber and has a 2-phase structure composed of a soft segment imparting elasticity and a hard segment imparting rigidity. Representative examples of the styrenic thermoplastic elastomer include poly (styrene-butadiene-styrene) (SBS), poly (styrene-isoprene-styrene) (SIS) -Ethylene-propylene-styrene) (SEPS). The styrenic thermoplastic elastomer has a wide range of hardness, good bending resistance and abrasion resistance, low density, and easy recyclability.

The olefinic thermoplastic elastomer may include at least one of an ethylene vinyl acetate copolymer (EVA copolymer), an alpha (alpha) -olefin copolymer and a copolymer of an aromatic olefin, and preferably an ethylene vinyl acetate copolymer . ≪ / RTI >

The ethylene vinyl acetate copolymer preferably has a vinyl acetate content of 18% to 50% by weight. When vinyl acetate is included in the above range, excellent elasticity and dispersibility of inorganic filler can be exhibited.

In the present invention, the melt index of the olefinic thermoplastic elastomer may be 0.1 to 50 g / 10 min, preferably 0.3 to 20 g / 10 min. If the melt index is less than 01 g / 10 min, the melt index of the final composition may be lowered, and the moldability may be deteriorated during processing. If the melt index exceeds 50 g / 10 min, the heat resistance may decrease.

In the present invention, the density of the olefinic thermoplastic elastomer may be 0.85 to 0.90 g / cm ³ , preferably 0.86 to 0.88 g / cm ³ . If the density is less than 0.85 g / cm < ³ >, the tensile strength may decrease. If the density is more than 0.90 g / cm < ³ >

In one embodiment of the present invention, the thermoplastic elastomer composition comprises a styrenic thermoplastic elastomer and an olefinic thermoplastic elastomer, wherein the styrenic thermoplastic elastomer is poly (styrene-butadiene-styrene) (SBS), and the olefinic thermoplastic elastomer May be an ethylene vinyl acetate copolymer. The poly (styrene-butadiene-styrene) (SBS) and the ethylene vinyl acetate copolymer may be contained in a weight ratio of 1: 0.4 to 1: 0.6. It is possible to exhibit excellent elasticity and tensile strength in the above range.

As the adhesive resin (B), a thermoplastic resin having a molecular weight of several hundred to several thousands of amorphous oligomers and being liquid or solid at room temperature may be used. Specifically, the viscous resin may include at least one resin selected from the group consisting of a C5 series resin and a C9 series resin, a rosin resin, a polybutene, a naphthenic process oil, and a rosin-modified resin.

The adhesive resin (B) may be contained in an amount of 10 to 50 parts by weight based on 100 parts by weight of the thermoplastic elastomer (A). It is possible to exhibit excellent adhesion in the above range.

The glass fiber (C) is a chopped fiber having a length of 2 mm to 8 mm, and the diameter of the cross section may be about 30 탆 to about 150 탆, for example, about 50 탆 to about 120 탆. When the length of the glass fiber is less than 2 mm, the dispersibility is hardly secured and the improvement of the physical properties of the sealant can not be expected. Even if the length exceeds 8 mm, the effect of improving the physical properties can not be expected due to uneven mixing. An example of the glass fiber is E-glass glass fiber. The glass fiber (C) may be contained in an amount of 10 to 50 parts by weight based on 100 parts by weight of the thermoplastic elastomer (A). In the above range, excellent stiffness, dimensional stability and heat resistance can be exhibited.

The glass fiber (C) may be surface-treated with a sizing composition at the time of manufacture or in a post-treatment process. As the sizing composition, a lubricant, a coupling agent, a surfactant, and the like are used. The lubricant is used to form good strands when making glass fibers. The coupling agent serves to improve the adhesion between the glass fiber and the thermoplastic elastomer resin. The glass fiber used in the present invention is particularly preferably surface-treated with a coupling agent.

In the present invention, the coupling agent to be treated with the glass fiber may be a silane coupling agent represented by the following formula (1).

[Chemical Formula 1]

XRSiY ₃

X is an organic functional group capable of reacting with the thermoplastic elastomer resin, such as a vinyl group, an epoxy group, a methane group, an amine group or an acrylic group, Y is an ethoxy group, a methoxy group or a halogen group, and R is an alkyl group.

In the above formula, Y, which is an ethoxy group, a methoxy group or a halogen group, combines with moisture contained in air or an inorganic material to form a hydrolyzed silanol, and the silanol bonds with the glass fiber. Therefore, the silane-based coupling agent has a structure capable of reacting with and bonding with the resinous and glass fibers.

There is no particular limitation on the method of treating the silane coupling agent to the glass fiber, and the method can be easily carried out according to a general method. For example, there are a method of directly treating the silane-based coupling agent with a glass fiber, a method of adding the silane coupling agent to a thermoplastic elastomer matrix resin, and the like.

Examples of the silane-based coupling agent include amine-based, acrylic-based or epoxy-based γ-aminopropyltriethoxy silane, γ-aminopropyltrimethoxy silane, N- -Aminoethyl) gamma -aminopropyltriethoxy silane, gamma -methacryloxypropyltriethoxy silane, gamma-methacryloxypropyltriethoxy silane, gamma -methacryloxypropyltriethoxy silane, (Γ-methacryloxy propyltrimethoxy silane), γ-glycidoxy propyltrimethoxy silane, β (3,4-epoxyethyl) γ-aminopropyltrimethoxysilane beta (3,4-epoxyethyl) -amino propyltrimethoxy silane).

These may be used alone or in combination of two or more. Of these, an acrylic silane coupling agent or an epoxy silane coupling agent is preferred. As the acrylic silane coupling agent, γ-methacryloxypropyltriethoxysilane or γ-methacryloxypropyltrimethoxysilane is preferable.

The inorganic filler (D) may be at least one inorganic filler selected from the group consisting of calcium carbonate, calcium carbonate, silica, kaolin, montmorillonite, fly ash, and quicklime. The inorganic filler may be used in the form of a powder having an average particle diameter (D50) of 10 to 50 mu m.

The inorganic filler is used for improving dimensional stability and abrasion resistance and may be contained in an amount of 80 to 120 parts by weight based on 100 parts by weight of the thermoplastic elastomer. If the content of the inorganic filler is less than 80 parts by weight, the dimensional stability, abrasion resistance, and thixotropic deteriorate, resulting in lowering of durability. When the content of the inorganic filler exceeds 120 parts by weight, And the like, which is undesirable.

In another embodiment of the present invention, the thermoplastic elastomer composition for crack repair may further comprise an asphalt binder (E). The asphalt binder can optionally be used when the construction subject is an asphalt pavement.

The asphalt binder (E) is not particularly limited as long as it has a viscosity (60 ° C) of 100 to 1,000,000 Poise and a penetration degree (25 ° C) according to ASTM regulation falls within a range of 5 to 400 dmm (1/10 mm) Various types of straight-run asphalt produced and hydrocarbon-based oils such as paraffin, aromatic, naphthenic and the like may be diluted with each other and those obtained by oxidizing them. It may also include special asphalt other than petroleum-based asphalt such as Coal tar pitch, Trinidad asphalt. More preferably, the asphalt has a flash point (COC system, ASTM D-92) of at least 230 ° C and the asphaltene content (ASTM D 4142) is 2 to 40% by weight.

The asphalt binder (E) may be included in an amount of 50 to 80 parts by weight based on 100 parts by weight of the thermoplastic elastomer. It is possible to provide excellent adhesion and water tightness in the above range.

The thermoplastic elastomer composition for crack repair may further comprise at least one additive selected from the group consisting of antioxidants, heat stabilizers, dispersants, compatibilizers, ultraviolet stabilizers, plasticizers, pigments, and combinations thereof in addition to the above components. The additive may be included in an amount of 1 to 10 parts by weight based on 100 parts by weight of the thermoplastic elastomer.

For example, the ultraviolet stabilizer is effective for effectively blocking ultraviolet rays while improving the thermal stability and oxidation stability of the thermoplastic elastomer, thereby improving weatherability.

A hindered amine-based ultraviolet stabilizer may be preferably used as the ultraviolet stabilizer, and a hindered amine-based ultraviolet stabilizer commonly used in the art may be used without limitation. Specific examples of the ultraviolet stabilizer include Polymer of dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol, Bis (2,2,6,6-tetramethyl-4-piperidinyl) sebacate, Bis 1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, Poly [6 - [(1,1,3,3-tetramethylbutyl) amino] -1,3,5-triazine- [(2,2,6,6-tetramethyl-4-piperidinyl) imino] hexamethylene [2,2,6,6-tetramethyl-4-piperidinyl) imino]], or a mixture thereof.

The above-mentioned thermoplastic elastomer composition for crack repair according to the present invention is excellent in strength, durability and weatherability, and the maintenance method of the road pavement using the above-mentioned thermoplastic elastomer composition for repairing cracks is easier than the conventional method and the construction time is significantly shortened And provides an effect that can be achieved.

Maintenance method of road pavement

Fig. 1 shows a construction site on a road pavement requiring repair. In FIG. 1, a small crack 10a, a crack 10b, and a porthole 10c are illustrated as a construction site 10 requiring repair on a concrete road pavement 1. However, But is not limited to.

The road pavement to be constructed can be concrete road pavement, asphalt road pavement, etc., and the construction site requiring repair on the road pavement may be a crack, a pot hole, a turtle etc. crack, .

According to one embodiment of the present invention, a maintenance method of a road pavement includes a cutting step (S1) of cutting a construction site to a predetermined depth and width; A foreign substance removing step (S2); Primer application step (S3); And forming a seal layer, wherein the step of forming the seal layer comprises: (S4) forming a first seal layer; And forming a second seal layer on the first seal layer (S5).

The step of forming the seal layer includes the steps of laying a thermoplastic elastomer composition for crack repair at a predetermined thickness on the construction site, laying an aggregate on the thermoplastic elastomer composition laid out, and heating and compressing by heating iron And then planarizing the surface.

2 to 6 sequentially illustrate maintenance methods of road pavement according to one embodiment of the present invention. Fig. 2 shows a cutting step S1, Fig. 3 shows a foreign matter removing step S2, FIG. 5 shows a step S4 of forming a first seal layer, and FIG. 6 shows a step S5 of forming a second seal layer, respectively. Hereinafter, description will be made with reference to Figs. 2 to 6. Fig.

Referring to FIG. 2 (a), the cutting step S1 is a step of forming a flat surface by cutting a construction site 10 requiring repair to a predetermined width and a predetermined depth using a planer 20. Fig. 2 (b) shows the cutting width 40 required in repairing the joint damage area 30 formed on the road pavement surface.

Thus, by forming the flat surface on the upper part of the construction site through the cutting step S1, the adhesive force of the thermoplastic elastomer composition to the road pavement surface can be ensured and the seal layer formed on the flat surface has a constant thickness and width, And durability. The depth to be cut may vary depending on the size of the construction site, but may be, for example, 1 to 5 cm.

The step S2 of removing the foreign material at the cutting area is a step of removing the foreign matter remaining in the construction part after cutting the same into the planer by the cutting step S1. The foreign matter can be removed by using a blower 50 or the like.

The primer applying step S3 is a step of applying a primer on the surface 60 of the application site through a spray gun or the like in advance before the thermoplastic elastomer composition for crack maintenance is applied to the application site to form a thermoplastic elastomer composition for repairing cracks So as to sufficiently secure the adhesive force.

The step (S4) of forming the first seal layer includes a step (S41) of laying a thermoplastic elastomer composition (70) for repairing cracks at a predetermined thickness on the application site coated with the primer first; A step (S42) of laying a large aggregate (80) on the first thermoplastic elastomer composition (70) laid on the first side; And a step (S43) of flattening by first heating and pressing with a heating iron (90). Since the above-mentioned thermoplastic elastomer composition for crack repairing is as described above, a detailed description thereof will be omitted.

The amount of the thermoplastic elastomer composition to be firstly installed may vary depending on the depth of the construction site. For example, the thermoplastic elastomer composition 70 to be firstly installed can be installed to a depth of 1/2 to 3/4 of the depth of the installation site. A large aggregate (80) is placed on the first thermoplastic elastomer composition (70) laid first. The large aggregate 80 may be 0.5 to 1 mesh in size and then crushed in a crusher and then hanged to use the supplied aggregate. The volume ratio of the large aggregate 80 and the primary installation amount of the thermoplastic elastomer composition 70 for crack repairing may be 1: 3 to 1: 5.

The large aggregate (80) can be prepared and supplied in a heat-dried state before being placed on the thermoplastic elastomer composition (70) for crack repair. As an example, the large aggregate 80 may be supplied to the thermoplastic elastomer composition 70 for crack repair after heating and drying at a temperature of 75 ° C to 120 ° C.

The predetermined amount of the large aggregate 80 may be impregnated into the upper part of the first cracked thermoplastic elastomer composition for repairing cracks. The crack-repairing thermoplastic elastomer composition impregnated with the large aggregate can be melted and cured by heating of the heating iron, and the first sealing layer 100 whose surface is planarized by the compression of the heating iron can be formed.

The heating iron 90 includes a hot plate 92 and a handle 91 formed on the upper surface of the heating plate 92. The heating plate 92 may be a plate-shaped and made of a metal material containing copper or magnesium excellent in thermal conductivity. It is possible not only to accelerate the melting and curing of the thermoplastic elastomer composition during heating and compression using a heated iron, but also to increase the adhesive strength of the impregnated aggregate and the thermoplastic elastomer composition for repairing cracks to shorten the construction time, And durability can be improved.

The temperature of the heating plate 92 of the heating irons 90 may be from 150 캜 to 190 캜. The thermoplastic elastomer composition for crack repair can be cured within a short time without lowering the physical properties of the thermoplastic elastomer composition for crack repair.

A second seal layer is formed on the first seal layer. The step of forming the second seal layer may include a second step (S51) of applying the thermoplastic elastomer composition (70) for crack repairing; (S52) of installing a small-sized aggregate material (110) on the secondarily installed thermoplastic elastomer composition for crack repair (70); And a step (S53) of flattening by heating and compressing with a heating iron (90).

The crack repairing thermoplastic elastomer composition is secondarily laid to the surface of the road pavement so as to completely fill the construction site, and a fine aggregate is installed on the secondarily installed thermoplastic elastomer composition for crack repair. The fine aggregate is supplied in a heated and dried state in the same manner as the large aggregate, and the small aggregate is used as the aggregate supplied after being crushed in a crusher with a size of 16 to 30 mesh.

The height of the second seal layer and the height of the first seal layer may be 1: 2 to 1: 3. It is possible to exhibit excellent stiffness, durability and dimensional stability of the seal layer repaired in the above range.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

delete delete A cutting step of cutting the construction site to a predetermined depth and width;
A foreign matter removing step;
Primer application step; And
Comprising the step of forming a seal layer,
The forming of the seal layer may include forming a first seal layer; And forming a second seal layer on the first seal layer,
The step of forming the first seal layer includes the steps of: firstly laying a thermoplastic elastomer composition for crack maintenance at a predetermined thickness on a primer applied area; laying a large aggregate on the first thermoplastic elastomer composition laid on the primer; And a flattening step of primary heating and pressing with heating iron,
The step of forming the second seal layer includes a step of secondarily laying a thermoplastic elastomer composition for crack repairing, a step of laying a small aggregate on the secondarily laid thermoplastic elastomer composition, and a second step of heating and compressing with a heated iron / RTI >
The fine aggregate and the large aggregate are heated and dried at a temperature of 75 to 120 DEG C and then supplied to the thermoplastic elastomer composition for crack repair,
The large aggregate is 0.5 to 1 mesh in size, and is crushed in a crusher,
The fine aggregate is crushed in a crusher with a size of 16 to 30 mesh,
The heating iron comprises a hot plate and a handle formed on the upper surface of the heating plate, wherein the heating plate is a plate-shaped and made of a metal material containing copper or magnesium, and the heating plate has a temperature of 150 to 190 ° C Maintenance method of road pavement with characteristic. The method of claim 3,
The crack-repairing thermoplastic elastomer composition
100 parts by weight of the thermoplastic elastomer (A);
10 to 50 parts by weight of a tacky resin (B);
10 to 50 parts by weight of glass fiber (C); And
And 80 to 120 parts by weight of an inorganic filler (D). delete delete delete The method of claim 3,
Wherein the ratio of the amount of the large aggregate to the amount of the primary addition of the crack-repairing thermoplastic elastomer composition is 1: 3 to 1: 5. The method of claim 3,
Wherein a height of the second seal layer and a height of the first seal layer are 1: 2 to 1: 3. 5. The method of claim 4,
Wherein the thermoplastic elastomer (A) comprises at least one of a styrenic thermoplastic elastomer and an olefinic thermoplastic elastomer, the styrenic thermoplastic elastomer is poly (styrene-butadiene-styrene) (SBS), the olefinic thermoplastic elastomer is an ethylene vinyl Acetate copolymer,
The adhesive resin (B) comprises at least one resin selected from the group consisting of a C5 series resin, a C9 series resin, a rosin resin, a polybutene, a naphthenic process oil, and a rosin-
The glass fiber (C) is a chopped fiber having a length of 2 mm to 8 mm, a diameter of a cross section of 30 to 150 탆,
Wherein the inorganic filler (D) comprises at least one member selected from the group consisting of calcium carbonate, calcium carbonate, silica, kaolin, montmorillonite, fly ash and quicklime.

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