KR101941610B1 - Multi functional asphalt mixture with improved workability and water-resistance and manuacturing method thereof - Google Patents

Abstract

The present invention relates to a high-functioning asphalt mixture with improved workability and water resistance and a manufacturing method thereof. Specifically, provided are an asphalt mixture and a manufacturing method thereof. The asphalt mixture includes an aggregate, asphalt, a filler, and a high-functioning additive. The asphalt mixture exhibits excellent blending properties, compactibility, crack resistance, and water resistance, and can be widely used for heated asphalt mixtures, middle-temperature asphalt mixtures, or recycled asphalt concrete pavement.

Description

TECHNICAL FIELD [0001] The present invention relates to a high-performance asphalt mixture having improved workability and water resistance, and a method for producing the same. [0002]

The present invention relates to a method for producing a high-performance asphalt mixture having improved workability and moisture resistance, and more particularly, to a high-performance general and modified asphalt mixture having improved mixing, compaction, cracking resistance and moisture resistance of asphalt and aggregate Mixture and a method for producing the same.

Asphalt Mixture is usually called ascon, and after putting asphalt, aggregate, filler, etc. into the asphalt mixing plant, these materials are heated at a high temperature of 160 to 180 ° C And the mixture is heated and mixed, and then, after being installed and compacted on the road, it is cooled to room temperature and exposed to various environments such as sunlight and rainwater, and is used for a long period of years.

Therefore, not only a lot of energy is required for high-temperature heating but also harmful gas such as carbon dioxide, sulfur oxide, and nitrogen oxide is generated during the production and construction of the asphalt mixture, Lt; / RTI > In addition, since it takes a long time to cool the asphalt mixture produced at a high temperature of 160 to 180 DEG C during road pavement to room temperature, there is a problem that the traffic opening time is delayed and workers are exposed to the risk of safety accidents . In addition, asphalt is produced at a high temperature, the aging of the oxidation progresses relatively quickly, leading to premature packaging cracking and shortening the life of the package.

In order to solve such a problem, a method for mixing and compaction of an asphalt mixture at a temperature of 20 to 40 ° C lower than that of a conventional hot-mix asphalt mixture (HMA), is disclosed in Warm-Mix Asphalt Mixture Research has been actively carried out and development of a mid-temperature additive for a medium temperature asphalt mixture having a further improved performance is required.

The recently developed mesophilic asphalt concrete can be described as a medium-temperature pavement technique using a chemical blowing agent developed in Japan. This technique generates and disperses fine bubbles and air entraining agent (AE agent) in the asphalt, By keeping the microbubbles in the asphalt mixture until the completion of the installation of the mixture, the microbubbles are improved in flexibility. According to this technique, the mixing of the aggregate and the asphalt is improved by the fine air generated by the foaming of the asphalt, and the compaction is improved in the course of laying and compaction.

However, this technology does not allow fine bubbles to escape from asphalt after the completion of construction, and it is present in asphalt concrete, which weakens the bonding strength and lowers the durability of the packaging. Therefore, it is difficult to guarantee the quality and maintenance of the asphalt mixture is difficult. there is a problem.

Sasobit Wax is also known as a medium temperature asphalt additive. Sasobit Wax is a Fischer-Tropsch process that uses a mixture of hydrocarbon chains produced from coal gas. It is also called FT paraffin wax. The role of Sasobit Wax is to lower the viscosity of asphalt during the production of asphalt concrete, And the like. However, this Sasobit Wax is a kind of wax-based material and it can produce middle-temperature asphalt concrete by improving the fluidity, but weakens the bonding force between aggregate and asphalt and low water resistance of the applied asphalt, There is a problem that the peeling phenomenon of the asphalt peeling off from the aggregate proceeds rapidly and the pavement damage is caused.

Other PE waxes can also produce mesophilic asphalt concrete in the same context as Sasobit wax as low molecular weight PE, but they are not helping to improve quality as well.

In order to compensate for these drawbacks of the wax type mesophase asphalt additive, recently, an anti-stripping agent of an amine type has been mixed with a wax type additive or an amine type mesophilic asphalt additive has been developed In this case, however, there is a problem in that the cost is excessively high or the dynamic stability is deteriorated.

Therefore, there has been a demand for development of a material excellent in water resistance, plastic deformation resistance and crack resistance while securing the mixing and compaction performance of the asphalt mixture.

The present invention for solving the above problems is to provide a multifunctional asphalt which is excellent in mixing property between asphalt and aggregate and can provide an asphalt having excellent physical and chemical properties such as compaction property, moisture resistance and crack resistance of the asphalt mixture And an object of the present invention is to provide a high-performance asphalt mixture having improved workability and performance by using the additive.

It is another object of the present invention to provide an asphalt mixture including the high-performance asphalt additive and being able to be installed at a temperature 20 to 50 ° C lower than the existing asphalt application temperature.

In order to accomplish the above object, one aspect of the present invention is to provide a process for producing a high-performance additive comprising an aggregate, an asphalt, a filler and a repeating unit represented by the following formula (1), wherein at least one of the end groups comprises a high- It is a highly functional asphalt mixture with improved resistance.

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

In one embodiment of the present invention, the high-performance asphalt mixture may comprise 90 to 99% by weight of a mixture of aggregate and filler and 1 to 10% by weight of an asphalt composition comprising asphalt and high-performance additive.

In one embodiment of the present invention, the asphalt composition may contain 0.05 to 20 parts by weight of a high-performance additive per 100 parts by weight of the asphalt.

In one aspect of the present invention, the asphalt may be any one or a mixture of two or more selected from the group consisting of natural asphalt, petroleum asphalt, petroleum pitch, cyclic asphalt and modified asphalt.

In one embodiment of the present invention, the asphalt may be selected such that the asphalt-co-efficient high temperature grade according to KS F 2389 is in the range of 46 to 82 캜 and the low temperature grade is classified as -10 to -40 캜.

In one aspect of the present invention, the asphalt may include any one or a mixture of two or more selected from an asphalt regeneration additive, an asphalt penetration modifier, and an asphalt softener.

In one embodiment of the present invention, the modified asphalt is selected from the group consisting of natural rubber, styrene-butadiene-rubber copolymer, styrene-butadiene-styrene copolymer, polyethylene, polypropylene, nylon, vinyl chloride, ethylene methacrylate, Vinyl acetate copolymer, polybutadiene, polyisoprene, butyl rubber, styrene-butadiene rubber, polychloroprene rubber, and waste tire reclaimed rubber;

A hydrocarbon-based modifier including one or more selected from wax-based asphalt additives, natural asphalt, petroleum pitch and gilsonite;

≪ / RTI > or a mixture of two or more thereof.

In an embodiment of the present invention, the filler is selected from the group consisting of limestone powder, slaked lime, portland cement, recovered dust, fly ash, electric furnace slag, cast dust, carbon black, sulfur, lignin, cellulose fiber, nylon fiber, Polyethylene fibers, polyethylene fibers, polypropylene fibers, polyvinyl alcohol fibers and natural fibers, or a mixture of two or more thereof.

In one aspect of the present invention, the aggregate may be selected from natural aggregates, recycled aggregates, and mixed aggregates thereof.

In one embodiment of the present invention, the mixed aggregate may include 0.1 to 70% by weight of the recycled aggregate.

In one embodiment of the present invention, the high-performance additive may have a total amine content of 100 to 1500 mgKOH / g, a viscosity measured at 25 ° C of 1500 to 15000 cSt, and a nitrogen / oxygen molar ratio of 0.5 to 4.

In one embodiment of the present invention, the high-performance additive may be any one or a mixture of two or more selected from compounds represented by the following general formula (3).

(3)

In Formula 3, n is an integer selected from 0 to 10,

Wherein R ₁ is alkyl of C ₁ -C _30,

에서 선택되고,A, R < ₂ > and R < ₃ > are each independently hydrogen or

Lt; / RTI >

이고,Wherein A, R ₂ and R ₃ is any one of or two or more be

ego,

Wherein R ₄ is an alkyl of C ₁ -C _30.

In one embodiment of the present invention, the compound of Formula 3 may have a weight average molecular weight of 500 to 1500 g / mol.

In one embodiment of the present invention, the high-performance asphalt mixture may be one or more selected from the surface layer, the intermediate layer and the base layer of the asphalt concrete.

In one aspect of the present invention, the high-performance asphalt mixture may be one or more selected from a hot asphalt mixture, a mesophase asphalt mixture, a recycled asphalt mixture using waste as- cons, a mesophilic regenerated asphalt mixture, and a foaming asphalt mixture have.

In one aspect of the present invention, the high-performance asphalt mixture is selected from a wheat-size asphalt concrete pavement, a fluid-resistant asphalt concrete pavement, an as-built asphalt concrete pavement, an asphalt-pavement asphalt concrete pavement, a drainage asphalt concrete pavement and a crushed stone mastic asphalt concrete pavement Which may be used for asphalt concrete pavement.

Another embodiment of the present invention is a process for preparing an asphalt composition comprising: a) mixing a high-performance additive comprising asphalt and repeating units of the following formula (1), wherein at least one of the end groups has the following formula ) step; And

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

b) mixing the asphalt composition, the aggregate and the filler;

By weight of the asphalt mixture.

In one embodiment of the present invention, the step a) may be carried out at a temperature of 100 to 190 ° C for 1 to 120 minutes.

In one embodiment of the present invention, the step b) may be performed at a temperature of 100 to 190 ° C for 10 to 100 seconds.

Another aspect of the present invention relates to a method for producing a high-performance asphalt mixture, which comprises mixing an asphalt and a high functional additive containing at least one of terminal groups represented by the following formula to be.

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

In one embodiment of the present invention, the mixing may be performed at a temperature of 100 to 190 DEG C for 10 to 100 seconds.

) 하기 화학식 1의 반복 단위를 포함하고, 말단기 중 적어도 하나가 하기 화학식 2를 포함하는 고기능성 첨가제와 아스팔트 재생첨가제, 아스팔트 침입도 조절제 및 아스팔트 연화제에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 혼합하여 고기능성 첨가제 조성물을 제조하는 단계; 및Another aspect of the present invention is

) A high-performance additive containing a repeating unit represented by the following formula (1), at least one of the end groups being represented by the following formula (2), and an asphalt regeneration additive, an asphalt penetration modifier and an asphalt softener, Preparing a high-performance additive composition; And

 [Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

) 상기 고기능성 첨가제 조성물과 아스팔트, 골재 및 채움재를 혼합하는 단계;

Mixing the high-performance additive composition with asphalt, aggregate and filler;

By weight of the asphalt mixture.

) 단계는 40 ~ 120℃의 온도에서 1 ~ 60분간 혼합하는 것일 수 있다.In one aspect of the present invention,

) May be carried out at a temperature of 40 to 120 DEG C for 1 to 60 minutes.

) 단계는 100 ~ 190℃의 온도에서 10 ~ 100초간 혼합하는 것일 수 있다.In one aspect of the present invention,

) May be carried out at a temperature of 100 to 190 DEG C for 10 to 100 seconds.

The asphalt mixture of the present invention can improve the productivity, workability and performance of the asphalt mixture by improving the mixing property of the aggregate and the asphalt, the compaction of the asphalt mixture, the water resistance, the crack resistance and the like.

Hereinafter, the asphalt mixture according to the present invention will be described in detail with reference to specific examples. It should be understood, however, that the invention is not limited thereto and that various changes and modifications may be made without departing from the spirit and scope of the invention.

Unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention is merely intended to effectively describe a specific embodiment and is not intended to limit the invention.

The 'asphalt composition' in the present invention means a mixture of asphalt and the high-performance additive of the present invention.

The 'asphalt mixture' in the present invention means a mixture of asphalt and the high-performance additive of the present invention, aggregate and filler.

The asphalt composition of the present invention can be mixed with the asphalt and the high-performance additive in the production of the asphalt mixture, and it is also possible to mix the asphalt and the high-performance additive in advance before mixing the asphalt mixture.

Hereinafter, one aspect of the present invention will be described in detail.

The inventors of the present invention use a high-performance additive to improve the productivity, workability and performance of the asphalt mixture by improving the mixability of the asphalt and the aggregate, the compaction of the asphalt mixture, the moisture resistance and the crack resistance, The total amine content in the additive and the molar ratio of nitrogen to oxygen can be controlled at a specific ratio to further improve the above effects, thereby completing the present invention.

Specifically, one embodiment of the present invention relates to a high-performance additive comprising a repeating unit represented by the following formula (1), wherein at least one of the terminal groups includes the following formula (2) and an asphalt mixture containing the same.

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

Unless otherwise defined herein, the term " alkyl " includes both straight and branched chains.

In one aspect of the invention, the formula (1) is a unit derived from a polyamine, wherein the formula (2) include alkyl glycidyl be that the units derived from the glycidyl ether, the alkyl glycidyl ether is a C ₁ -C ₃₀ alkyl And may be a mixture of two or more compounds having different alkyls.

The polyamine refers to any one or a mixture of two or more compounds selected from the group of compounds represented by the following formula (4), but is not limited thereto.

[Chemical Formula 4]

M = 1 to 10 in the formula (4).

More specifically, examples of the polyamines include polyamines such as ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexaamine, hexaethyleneheptaamine, heptaethyleneoctaamine, octaethyleneonanamine, Decaamine and decaethylene undecaamine, or a mixture of two or more thereof. Further, if necessary, it may further contain an aromatic compound such as aminoethylpiperazine.

More preferably a mixture comprising diethylene triamine, tetraethylene pentaamine, pentaethylene hexaamine, hexaethylene heptaamine and polyethylene polyamine and having a number average molecular weight of 250 to 300 g / mol and an amine content of 1100 To 1300 mg KOH / g.

The polyethylenepolyamine may be an integer selected from the group consisting of 7 to 10 in the formula (4), or a mixture thereof, but is not limited thereto.

The alkyl glycidyl ether refers to a mixture of two or more compounds selected from the group of compounds represented by the following general formula (5) or compounds having different alkyls, but the present invention is not limited thereto.

[Chemical Formula 5]

In Formula 5, R < ₁₁ > C ₁ -C ₃₀ alkyl.

Even better, it may be a mixture of compounds having an alkyl C ₈ -C ₁₈ mixed.

In one embodiment of the present invention, the high-performance additive may be any one or a mixture of two or more selected from compounds represented by the following general formula (3).

(3)

In Formula 3, n is an integer selected from 0 to 10,

Wherein R ₁ is alkyl of C ₁ -C _30,

에서 선택되고,A, R < ₂ > and R < ₃ > are each independently hydrogen or

Lt; / RTI >

이고,Wherein A, R ₂ and R ₃ is any one of or two or more be

ego,

Wherein R ₄ is an alkyl of C ₁ -C _30.

In one embodiment of the present invention, in the general formula (3), n may be an integer selected from 0 to 10, more preferably 3 to 10.

에서 선택될 수 있다.When n is 2 or more, A may be the same or different and each represents hydrogen or

≪ / RTI >

In one embodiment of the present invention, the compound of Formula 3 is excellent in peel-preventing function, mixing property and compaction property within a range of weight average molecular weight of 500 to 1500 g / mol, but is not limited thereto.

In one embodiment of the present invention, the high-performance additive may have a total amine content of 100 to 1500 mgKOH / g, a viscosity measured at 25 ° C of 1500 to 15000 cSt, and a nitrogen / oxygen molar ratio of 0.5 to 4. More specifically, the total amine content may be 200 to 800 mgKOH / g, the viscosity measured at 25 ° C may be 2000 to 13000 cSt, and the nitrogen / oxygen molar ratio may be 0.7 to 3.5. In the above range, it is possible to improve the mixability of the asphalt and the aggregate, the compaction of the asphalt mixture, and the water resistance. The range may be controlled by the kind and content of polyamine and alkyl glycidyl ether.

The total amine content in the properties of the additive can be measured according to ASTM D2896 and has an effect on improving the anti-peeling function of the asphalt, wherein the total amine content is 100 to 1500 mgKOH / g, more preferably 200 to 800 mgKOH / g < / RTI >

The viscosity may be measured according to ASTM D445. It is preferable that the viscosity of the asphalt mixture is in the range of viscosity for improving the mixing while having easy flowability at the mixing temperature, 15000 cSt, a viscosity of 1000 to 5000 cSt measured at 40 占 폚, and a viscosity of 300 to 800 cSt measured at 60 占 폚.

The nitrogen / oxygen molar ratio can be measured through elementary analysis, and it is intended to confirm the intra-molecular distribution ratio of the polyamine and the alkyl glycidyl ether in the additive. As the content of oxygen increases, the mixing / And has a hydrophilic property and a hydrophilic property at the same time in a molar ratio of 0.5 to 4, more specifically 0.7 to 3.5, so that it can not only be excellent in mixing with asphalt but also increase in storage stability.

In one embodiment of the present invention, the high-performance additive is not limited in its content because it can be used depending on the application. Specifically, it may be used in an amount of 0.05 to 20 parts by weight, preferably 0.1 to 10 parts by weight, preferably 0.1 to 5 parts by weight, more preferably 0.25 to 0.8 parts by weight, based on 100 parts by weight of the asphalt, Is sufficient in order to achieve the effect of improving the mixability, the compaction and the moisture resistance in the range, and is suitable from the economical point of view. However, the present invention is not limited thereto.

In one aspect of the present invention, the asphalt can be used without limitation as long as it is a commonly used asphalt. Specifically, it can include all natural and petroleum-derived asphalt. For example, any one or a mixture of two or more selected from natural asphalt, petroleum asphalt, petroleum pitch, regenerated asphalt, modified asphalt, and the like may be used, but is not limited thereto. The reclaimed asphalt refers to an asphalt extracted from Reclaimed Asphalt Pavement or remaining in a waste ascon.

The asphalt may be selected so that the asphalt-compatible high-temperature grade according to KS F 2389 is 46 to 82 ° C, and the low-temperature grade is classified as -10 to -40 ° C. It is preferable, but not limited, to select an appropriate grade of asphalt according to the climate or traffic conditions of the area in the above range.

In addition, the asphalt may comprise any one or a mixture of two or more selected from asphalt regeneration additives, asphalt penetration modifiers and asphalt softeners.

The asphalt regeneration additive, the asphalt penetration modifier, and the asphalt softening agent are not particularly limited as long as they are commonly used in the art, and specifically include, for example, a petroleum-based vacuum distillation process product, a heavy oil fluidized bed catalytic cracking process product, A by-product, a lubricating oil system, and an animal or vegetable oil system, but is not limited thereto.

The content is not limited, but may be 0.05 to 20 parts by weight, preferably 0.1 to 15 parts by weight, preferably 0.5 to 12 parts by weight, based on 100 parts by weight of the asphalt. It is a sufficient amount to achieve and is economically viable. However, the present invention is not limited thereto.

In one embodiment of the present invention, the modified asphalt may include any one or a mixture of two or more members selected from the group consisting of a polymer-based modifier and a hydrocarbon-based modifier.

More specifically, examples of the polymer type modifier include natural rubber, styrene-butadiene-rubber copolymer, styrene-butadiene-styrene copolymer, polyethylene, polypropylene, nylon, vinyl chloride, ethylene methacrylate, ethylene propylene rubber, ethylene vinyl Acetate copolymer, polybutadiene, polyisoprene, butyl rubber, styrene-butadiene rubber, polychloroprene rubber, and waste tire reclaimed rubber, and the like, but is not limited thereto. The polymer modifier is not limited, but may have a weight average molecular weight of 50,000 to 600,000 g / mol. And the content thereof may be 0.5 to 15 wt%, more preferably 2 to 12 wt%, of the modified asphalt content, but is not limited thereto.

Examples of the hydrocarbon-based modifier include, but are not limited to, any one or a mixture of two or more selected from wax-based asphalt additives, natural asphalt, petroleum pitch and gilsonite. The content of the hydrocarbon-based modifier may be 0.5 to 15 wt%, more preferably 2 to 12 wt%, of the modified asphalt content, but is not limited thereto.

In one embodiment of the present invention, the aggregate may be one using natural aggregates, recycled aggregates and mixed aggregates thereof. The recycled aggregate may be any one or a mixture of two or more selected from the group consisting of industrial waste such as construction waste, steel slag, and aggregate obtained from reclaimed asphalt pavement. The mixed aggregate of the natural aggregate and the recycled aggregate may include 30 to 99.9% by weight of the natural aggregate and 0.1 to 70% by weight of the recycled aggregate, but the present invention is not limited thereto.

The amount and size of the aggregate are not limited because they are determined by the type of the pavement to be constructed, the porosity, the ground conditions of the road surface to be constructed, the weather conditions, the traffic volume and the number of lanes. Specifically, for example, the aggregate content may be 80 to 99 wt% of the total weight of the asphalt mixture, but is not limited thereto. The aggregate may be a mixture of coarse aggregate, fine aggregate, or the like depending on the kind of the package to be constructed.

In one aspect of the invention, the filler is selected from the group consisting of limestone powder, slaked lime, portland cement, recovered dust, electric furnace slag, cast dust, fly ash, carbon black, sulfur, lignin, cellulose fibers, nylon fibers, poly A polyester fiber, a polyester fiber, an ester fiber, a polyethylene fiber, a polypropylene fiber, a polyvinyl alcohol fiber, a natural fiber, and the like, but is not limited thereto. The content of the filler is not limited because it may vary depending on the type of the package to be applied. Specifically, for example, the content of the filler may be 1 to 10 wt% of the total weight of the asphalt mixture, but is not limited thereto.

In one embodiment of the present invention, the amount of the aggregate and the filler may be varied depending on the porosity of the asphalt to be applied, and the mixture of the aggregate and the filler may be 90 to 99% by weight of the whole asphalt mixture. It is not.

The high-performance asphalt mixture of the present invention includes the high-performance additive described above, thereby improving the compatibility with the aggregate. Also, when recycled aggregate such as waste asbestos aggregate as well as natural aggregate is used, the mixing property, the compaction property and the moisture resistance are greatly improved. In an embodiment of the present invention, the asphalt mixture may contain 1 to 10 wt%, more preferably 3 to 7 wt%, of the asphalt composition, but is not limited thereto.

More specifically, the high-performance asphalt mixture of the present invention may include, but is not limited to, 90 to 99 wt% of a mixture of aggregate and filler and 1 to 10 wt% of an asphalt composition containing asphalt and high-performance additive . The asphalt composition may include 0.05 to 20 parts by weight of a high-performance additive based on 100 parts by weight of asphalt. Is sufficient to improve the desired workability and moisture resistance in the above range, and is economical, but is not limited thereto.

In one embodiment of the present invention, the asphalt mixture may be used without limitation as long as it is an additive conventionally used in the field as required. Examples of the additive used in the asphalt mixture include any one or a mixture of two or more selected from wax-based medium temperature asphalt (WMA) additive, amine-based type medium temperature asphalt (WMA) additive, peeling inhibitor and regenerant additive And may further include various additives depending on the object of packaging to be applied.

In one aspect of the invention, the high-functional asphalt mixture is energy dispersive X- ray fluorescence spectrometer (ED-XRF) using a silica (SiO ₂₎ content analyzed by semi-quantitative analysis of 60 to 80% by weight in the range The rate of change in moisture resistance of the aggregate may satisfy the following expression (1).

[Formula 1]

250? [(W2 - W1) / W1] 100

(In the above formula 1, W1 is the moisture resistance of the asphalt mixture excluding the high-performance additive, and W2 is the moisture resistance of the high-performance asphalt mixture containing the high-function additive.) The silica content of the aggregate is also analyzed by crushing the aggregate And the moisture resistance value is the test value of the aggregate coverage according to the EN-12697-11 test method.)

The moisture resistance change rate may be 250% or more, preferably 400% or more, more preferably 500% or more. Specifically, it may be 250 to 2000%. The water resistance is improved in the above range, and the occurrence of portholes can be prevented even when recycled aggregate or recycled asphalt is used.

In general, when an aggregate having a silica (SiO ₂ ) content in the range of 60 to 80% by weight is used, the water resistance is 10% or less, and when the high-performance additive of the present invention is added, the water resistance is further improved . Can be varied depending on the addition amount of the high-performance additive of the present invention, but it can be satisfied that the water resistance is 15 to 90%, more preferably 40 to 65%.

In one embodiment of the present invention, the high-performance asphalt mixture may be one or more selected from the surface layer, the intermediate layer and the base layer of the asphalt concrete, but is not limited thereto.

In one embodiment of the present invention, the high-performance asphalt mixture may be one or more selected from the group consisting of a heated asphalt mixture, a mesophase asphalt mixture, a recycled asphalt mixture using waste asbestos, a mesophilic regenerated asphalt mixture, and a foaming asphalt mixture But is not limited thereto.

In one aspect of the present invention, the high-performance asphalt mixture is selected from a wheat-size asphalt concrete pavement, an asphalt-filled asphalt concrete pavement, an asphalted asphalt concrete pavement, an asperity asphalt concrete pavement, a drainage asphalt concrete pavement and a crushed stone mastic asphalt concrete pavement But is not limited to, those used in asphalt concrete pavement.

In one embodiment of the present invention, the asphalt mixture can be applied at a temperature 20 to 50 ° C lower than the existing asphalt application temperature including the above-described high-performance additive. Specifically, the asphalt mixture can be applied to medium temperature asphalt A mixture can be provided. It is also applicable to asphalt for porthole reduction and asphalt for recycling waste asphalt.

Next, a method for manufacturing the asphalt mixture of the present invention will be described.

One aspect of the present invention to prepare a high-performance asphalt mixture with improved workability and moisture resistance

a pre-mixing step of preparing an asphalt composition by mixing a high-performance additive comprising asphalt and a repeating unit represented by the following formula (1), wherein at least one of the end groups has the following formula (2); And

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

b) mixing the asphalt composition, the aggregate and the filler;

.

In one embodiment of the present invention, the step a) may be carried out at a temperature of 100 to 190 ° C for 1 to 120 minutes. By mixing in the above range, the asphalt and the high-performance additive can be mixed more uniformly, which is preferable, but not limited thereto.

In the step a), the asphalt composition may contain 0.05 to 20 parts by weight of a high-performance additive based on 100 parts by weight of the asphalt, and the asphalt composition may include 1 to 10% by weight of the total amount of the asphalt mixture. . This is not limited to the range of economic contents while improving workability and moisture resistance.

In one embodiment of the present invention, the step b) may be performed at a temperature of 100 to 190 ° C for 10 to 100 seconds. The asphalt composition, the aggregate and the filler can be uniformly mixed in the above-mentioned range.

In addition, in the step b), the aggregate and the filler may be contained in an amount of 90 to 99% by weight of the total amount of the asphalt mixture, and the mixing ratio of the aggregate and the filler may vary depending on the porosity of the asphalt pavement It is not limited. However, more specifically, it may include, for example, 80 to 99% by weight of an aggregate and 1 to 10% by weight of a filler, but is not limited thereto.

Another aspect of the present invention for producing a high-performance asphalt mixture with improved workability and moisture resistance is as follows:

An aggregate and a filler may be mixed with a high-performance additive including asphalt and a repeating unit represented by the following formula (1), wherein at least one of the end groups includes the following formula (2).

[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

That is, the asphalt, the high-performance additive, the aggregate and the filler may be mixed at one time. In this case, the mixing may be performed at a temperature of 100 to 190 ° C for 10 to 100 seconds, but the present invention is not limited thereto. At this time, the mixing ratio is the same as described above.

Another aspect of the present invention for producing a high-performance asphalt mixture with improved workability and moisture resistance is as follows:

) 하기 화학식 1의 반복 단위를 포함하고, 말단기 중 적어도 하나가 하기 화학식 2를 포함하는 고기능성 첨가제에, 아스팔트 재생첨가제, 아스팔트 침입도 조절제 및 아스팔트 연화제에서 선택되는 어느 하나 또는 둘 이상의 혼합물을 혼합하여 고기능성 첨가제 조성물을 제조하는 단계; 및

A mixture of one or more selected from asphalt regeneration additive, asphalt penetration modifier and asphalt softener is mixed with a high-performance additive containing a repeating unit represented by the following formula (1) and at least one of the end groups having the following formula To produce a high-performance additive composition; And

 [Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,

In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

) 상기 고기능성 첨가제 조성물과 아스팔트, 골재 및 채움재를 혼합하는 단계;

Mixing the high-performance additive composition with asphalt, aggregate and filler;

.

) 단계는 40 ~ 120℃의 온도에서 1 ~ 60분간 혼합하는 것일 수 있다. 상기 범위에서 혼합함으로써 고기능성 첨가제와, 아스팔트 재생첨가제, 아스팔트 침입도 조절제 및 아스팔트 연화제에서 선택되는 어느 하나 또는 둘 이상의 혼합물이 더욱 균일하게 혼합될 수 있으므로 바람직하나 이에 제한되는 것은 아니다.In one aspect of the present invention,

) May be carried out at a temperature of 40 to 120 DEG C for 1 to 60 minutes. By mixing in the above range, it is preferable, but not limited, that one or more of the high-performance additive, the asphalt regeneration additive, the asphalt penetration modifier and the asphalt softener can be mixed more uniformly.

) 단계에서 고기능성 첨가제 조성물은 아스팔트 100 중량부에 대하여, 고기능성 첨가제를 0.05 ~ 20 중량부로 포함되는 것일 수 있으며, 아스팔트 재생첨가제, 아스팔트 침입도 조절제 및 아스팔트 연화제에서 선택되는 어느 하나 또는 둘 이상의 혼합물이 0.05 ~ 20 중량부로 포함되는 것일 수 있다. 상기 범위에서 작업성 및 수분저항성을 향상시키면서 경제적인 함량 범위인 것으로 이에 한정되는 것은 아니다.In addition,

), The high-performance additive composition may include 0.05 to 20 parts by weight of a high-performance additive with respect to 100 parts by weight of the asphalt, and may be any one or a mixture of two or more selected from asphalt regeneration additive, asphalt penetration modifier and asphalt softening agent May be contained in an amount of 0.05 to 20 parts by weight. The range of the content is economical, while improving the workability and moisture resistance in the above range.

) 단계는 100 ~ 190℃의 온도에서 10 ~ 100초간 혼합하는 것일 수 있다. 상기 범위에서 고기능성 첨가제 조성물, 아스팔트, 골재 및 채움재가 균일하게 혼합될 수 있으므로 바람직하나 이에 제한되는 것은 아니다.In one aspect of the present invention,

) May be carried out at a temperature of 100 to 190 DEG C for 10 to 100 seconds. In the above range, the high-performance additive composition, asphalt, aggregate, and filler can be uniformly mixed, and thus the present invention is not limited thereto.

Hereinafter, the present invention will be described by way of examples and comparative examples for the purpose of more detailed explanation, but the present invention is not limited to the following examples.

The following physical properties were measured by the following measurement methods.

1) Mixability between asphalt and aggregate

AASHTO T 195-11 Standard Method of Test for Determining Degree of Particle Coating of Asphalt Mixtures. Specifically, the asphalt mixture of the examples and the comparative examples was mixed at 125 DEG C for 2 minutes, and then the ratio of the coated aggregate was measured based on the total amount of coarse aggregates remaining in the sieve with 9.5 mm sieve.

2) Compaction of asphalt mixture

NCHRP Report 691 Mix Design Practices for Warm mix Based on the compactability test method using the SGC as mentioned in Asphalt. Specifically, the asphalt mixture of the examples and the comparative examples was mixed at 125 캜 for 2 minutes, put into a mold having a diameter of 101.6 mm, and the number of compaction until the pore became 7% was measured at 115 캜 using a rotary compaction machine.

3) Moisture resistance (aggregate coverage after dynamic soaking,%)

EN-12697-11 Determination of affinity between aggregate and bitumen. Specifically, 510 g of the aggregate of 11.2 to 8 mm and the 16 g of the asphalt composition in the aggregates of Examples and Comparative Examples were mixed for 3 minutes at the mixing temperature described in Examples and Comparative Examples, and after cooling at room temperature, 150 g of each sample was taken, And the mixture was rotated at a rate of 60 times per minute for 24 hours, and the amount of asphalt coated on the aggregate was visually evaluated.

4) Moisture resistance (tensile strength ratio after soaking,%)

AASHTO T 283 RESISTANCE OF COMPACTED ASPHALT MIXTURES TO MOISTURE-INDUCED DAMAGE. Specifically, the asphalt mixture of the examples and the comparative examples was mixed at 165 ° C for 2 minutes, put into a mold having a diameter of 101.6 mm, and turned and compaction was carried out at 145 ° C so as to have a pore size of 7 ± 1%. The tensile strength before and after the soaking Respectively.

5) Plastic deformation resistance (dynamic stability, times / mm)

KS F 2374 Wheel Tracking Test Method of Asphalt Mixture. Specifically, the asphalt mixture of the examples and the comparative examples were mixed at 125 ° C for 2 minutes, and then placed in a mold having a size of 300 x 300 x 50 mm in width x length x height and compaction was carried out at 115 ° C so as to have a void of 4 1% The number of wheel passes required to be 1 mm deformed after 45 minutes at a temperature of 60 ° C was evaluated.

6) Crack resistance (Marshall flow value, 1 / 100cm)

KS F 2337 Marshall stability and flow test method of asphalt mixture using Marshall tester. Specifically, the asphalt mixture of the examples and the comparative examples were mixed at 165 ° C for 2 minutes, put into a mold having a diameter of 101.6 mm, compaction was carried out at 145 ° C for 75 times on both sides, and the Marshall flow values were measured and compared.

7) Total Amine Content (mg KOH / g)

ASTM D2896.

8) Viscosity

ASTM D445.

9) N / O molar ratio

The nitrogen / oxygen molar ratio was calculated from the nitrogen content of the polyamine and the oxygen content of the alkyl glycidyl ether.

10) Weight average molecular weight (g / mol)

ASTM D5296.

[Manufacturing Example]

1) Preparation of High Functional Additives 1 to 3

High functionality Additives 1-3 were prepared by reacting a polyamine with an alkyl glycidyl ether.

The polyamine may be selected from the group consisting of diethylenetriamine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine and

 A mixture comprising polyethylene polyamine of the following formula (6) has a number average molecular weight of 250 to 300 g / mol and an amine content of 1257 mgKOH / g.

[Chemical Formula 6]

In the above formula (6), m = 7 to 10.

The alkylglycidyl ethers were mixed in the same amounts as in Table 1 below.

Carbon number C ₈ C ₁₀ C ₁₂ C ₁₄ C ₁₆ C ₁₈ weight% <0.3 <1 <65 21-28 4 to 8 0.5

High functionality additive 1 was prepared by reacting 20% by weight of a polyamine mixture with 80% by weight of an alkyl glycidyl ether of Table 1.

High functionality additive 2 was prepared by reacting 35% by weight of a polyamine mixture with 65% by weight of an alkyl glycidyl ether of Table 1 above.

High functionality additive 3 was prepared by reacting 50% by weight of a polyamine mixture with 50% by weight of an alkyl glycidyl ether of Table 1 above.

The properties of the prepared high-performance additives 1 to 3 were measured and are shown in Table 2 below.

Additive classification High Functional Additives 1 High Functional Additive 2 High Functional Additive 3 Total Amine Content (mg KOH / g) 250 420 630 Viscosity (25 ℃) 7748 11331 2477 N / O mole ratio 0.83 1.79 3.32 Weight average molecular weight (g / mol) 1474 831 574

[Examples 1 to 10]

1) Preparation of an asphalt composition

The content of the high-performance additive 1 in Table 2 is shown in Table 3 below with respect to 100 parts by weight of petroleum-based asphalt having a publicity grade of 64-22 according to KS F 2389 (64 ° C for high temperature grade and -22 ° C for low temperature grade) And the mixture was stirred at 150 DEG C and 400 rpm for 5 minutes to prepare an asphalt composition.

2) Preparation of asphalt mixtures and specimens

An asphalt mixture was prepared by mixing 5 wt% of the asphalt composition prepared above and 95 wt% of a mixture of granite aggregate and limestone filler satisfying WC-3 grain size at 125 ° C.

The granite aggregate used was one which meets the aggregate specifications according to KS F 2357 and the limestone filler material satisfying the filler standard according to KS F 3501 was used. The WC-3 particle size is a dense asphalt mixture of nominal maximum aggregate size of 20 mm with a maximum aggregate size of 20 mm as proposed by the National Highway Administration of Korea.

The asphalt mixture was compacted at 115 DEG C to prepare specimens.

The physical properties as described above were measured and are shown in Table 3 below.

[Comparative Example 1]

Example 1 was prepared in the same manner as in Example 1, except that a high-performance additive was not used in the production of the asphalt composition.

That is, asphalt mixture was prepared by mixing 95 wt% of a mixture of 5 wt% petroleum-based asphalt having a publicity rating of 64-22 according to KS F 2389 and granite aggregate and limestone filler satisfying WC-3 particle size .

The asphalt mixture was compacted at 115 DEG C to prepare specimens.

The properties are shown in Table 3 below.

division Quality standard Comparative Example 1 Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 Content of High Functional Additives
(Parts by weight) - 0 0.05 0.1 0.25 0.5 0.8 1.0 2.0 3.0 4.0 5.0 The content of the asphalt composition
(weight%) - 5 5 5 5 5 5 5 5 5 5 5 Mixing property between asphalt and aggregate (coating rate, 2 minutes @ 125 ℃),% 95 or higher 92.5 93.8 94.7 96.5 100 100 100 100 100 100 100 Compaction of the asphalt mixture (compaction times, air void 7% @ 115 ℃) - 19.5 18.6 17.5 15.3 13.2 12.2 11.8 10.9 10.2 9.8 9.8 Moisture resistance (aggregate coverage after dynamic soaking),% Over 50 5 15 25 40 50 65 70 75 80 80 80 Plastic deformation resistance (dynamic stability), times / mm 750 or more 486 512 634 738 870 784 732 628 530 424 286

As shown in Table 3, as the content of the high-performance additive of the present invention increases, the mixing ratio between the asphalt and the aggregate is increased by increasing the coating rate of the asphalt to be coated on the aggregate, It was found that the number of compaction decreased, and the plastic deformation resistance gradually increased and decreased again.

In addition, when the asphalt compositions of Examples 1 to 10 were mixed with the aggregate alone and the aggregate covering ratio was measured after the dynamic soaking as described in the physical property measuring method 3), it was confirmed that the moisture resistance was increased as the content of the additive was increased . Also, when compared with Comparative Example 1 in which only petroleum-based asphalt having an air compatibility rating of 64-22 according to KS F 2389 and an aggregate alone were mixed, it was found that the water resistance was greatly improved by adding the high-performance additive of the present invention.

In addition, the use of a small amount of the high-performance additive in Examples 1 to 3 did not satisfy the quality standard, but it was found that the physical properties were greatly improved in comparison with Comparative Example 1 in which the high-performance additive was not used.

[Example 11]

0.5 parts by weight were used in the same manner as in Example 4, except that the high-performance additive 2 of Table 2 was used in the production of the asphalt composition.

In addition, asphalt mixtures and specimens were prepared in the same manner as in Example 4.

The properties are shown in Table 4 below.

[Example 12]

0.5 parts by weight were used in the same manner as in Example 4, except that the high-performance additive 3 of Table 2 was used in the production of the asphalt composition.

In addition, asphalt mixtures and specimens were prepared in the same manner as in Example 4.

The physical properties were measured and are shown in Table 4 below.

division Quality standard Comparative Example 1 Example
11 Example
12 Content of High Functional Additives
(Parts by weight) - 0 0.5 0.5 The content of the asphalt composition
(weight%) - 5 5 5 Mixability between asphalt and aggregate Coating rate (2 minutes @ 125 &lt; 0 &gt; C),%
95 or higher 92.5 99.7 98.7 Compaction of asphalt mixture Number of compaction (air gap 7% @ 115 ℃), times - 19.5 14.3 15.8 Moisture resistance of asphalt mixture Coefficient of aggregate after dynamic soaking (%) Over 50 5 55 60 Resistance to plastic deformation of asphalt mixture Dynamic stability, times / mm 750 or more 486 814 774

As shown in Table 4, the nitrogen / oxygen (N / O) molar ratio of the high-performance additive increases, and as the weight average molecular weight decreases, the effect of improving the moisture resistance is continuously increased, while the mixture of asphalt and aggregate and the asphalt mixture And the compaction of the. This indicates that the effects on water resistance, mixing and compaction are different depending on additive chemical structure. Therefore, it is important to design chemical structure considering both mixing, compaction and moisture resistance.

[Example 13]

0.5 parts by weight of the high-performance additive 2 shown in Table 2 was added to 100 parts by weight of a petroleum-based asphalt having a compatibility level of 64-22 according to KS F 2389, and the mixture was stirred at a rate of 400 rpm at 150 캜 for 5 minutes to prepare a mesophilic asphalt composition Respectively.

A mixture of 5.2 wt% of the asphalt composition prepared above and 94.8 wt% of a mixture of granite aggregate and limestone filler satisfying the WC-2 particle size was mixed at 125 캜 for 2 minutes and then compacted at 115 캜 to prepare a specimen.

The granite aggregate used was one which meets the aggregate specifications according to KS F 2357 and the limestone filler material satisfying the filler standard according to KS F 3501 was used. The WC-2 particle size is a dense asphalt mixture of nominal maximum aggregate size of 13 mm with a maximum aggregate size of 13 mm as proposed by the National Highway Administration of Korea.

The physical properties were measured and are shown in Table 5 below.

[Comparative Example 2]

In Example 13, a wax-based additive (SASOL, Sasobit) was used in place of the high-performance additive 2, and the additive amount of the wax-based additive was changed to 1.5 parts by weight.

The physical properties were measured and are shown in Table 5 below.

[Comparative Example 3]

(AkzoNobel, Rediset WMX8017) in which a wax-based additive and an amine-based additive were mixed was used instead of the high-performance additive 2 in Example 13, except that the additive content was changed to 1.5 parts by weight Was prepared in the same manner as in Example 13.

The physical properties were measured and are shown in Table 5 below.

division Quality standard Example 13 Comparative Example 2 Comparative Example 3 Content of High Functional Additives
(Parts by weight) - 0.5 1.5 1.5 The content of the asphalt composition
(weight%) - 5.2 5.2 5.2 Mixing property between asphalt and aggregate (coating rate, 2 minutes @ 125 ℃),% 95 or higher 100 100 100 Compaction of the asphalt mixture (compaction times, air void 7% @ 115 ℃) - 13.8 13.6 13.2 Moisture resistance (aggregate coverage after dynamic soaking),% Over 50 55 5 20 Plastic deformation resistance (dynamic stability), times / mm 750 or more 798 1,500 756

As shown in Table 5, the mixing and compaction properties of the asphalt mixture were not significantly different between the comparative example and the example. However, the water resistance and the plastic deformation resistance, which are the main requirements of the road performance of the asphalt mixture, And Example 13 in which a high-functionality additive was applied showed good overall results.

In particular, compared with Comparative Example 2 using a wax-based additive and Comparative Example 3 using an additive in which a wax-based additive and an amine-based additive were mixed, the water content of Example 13 And the resistance was improved.

[Examples 14 to 16 and Comparative Example 4]

Examples 14 to 16 and Comparative Example 4 are for evaluating the water resistance according to the silica content of the aggregate. As shown in Table 6 below, the water resistance of the aggregates is different from that of the aggregate and the high- Respectively.

To 100 parts by weight of a petroleum-based asphalt having a publicity grade of 64-22 (high temperature of 64 DEG C, low temperature of -22 DEG C) according to KS F 2389, 0.5 parts by weight of high- And the mixture was stirred at 150 DEG C at a speed of 400 rpm for 5 minutes to prepare an asphalt composition.

16 g of the prepared asphalt composition and 510 g of aggregate of 11.2 to 8 mm were mixed at 160 ° C. for 3 minutes and then cooled at room temperature. 150 g of each sample was taken and placed in a water-containing test glass bottle and rotated at a rate of 60 times per minute for 24 hours The amount of asphalt coated on the aggregate was visually evaluated. Water resistance was based on EN-12697-11 Determination of affinity between aggregate and bitumen.

The silica (SiO ₂ ) content in the aggregate was analyzed by semi-quantitative analysis using an energy dispersive X-ray fluorescence spectrometer (ED-XRF).

SiO _{2 in} aggregate
Content, wt% Moisture resistance (aggregate coverage after dynamic soaking,%) Comparative Example 4 Example 14 Example 15 Example 16 High functionality
No additive High functionality
Additive 1 High functionality
Additive 2 High functionality
Additive 3 19.4 50 60 55 50 47.2 30 65 70 70 67.7 5 55 70 80 67.9 10 50 60 65

As shown in Table 6, in the case of using the aggregate having the silica content of 19.4% by weight in the aggregate, the water resistance of Comparative Example 4 in which the high-performance additive was not used and that in Examples 14 to 16 in which the high- There was no difference. However, in the case of using an aggregate having a silica content of 47.2 wt% in the aggregate, it was confirmed that the moisture resistance was improved by using the high-performance additive of the present invention.

In addition, when the silica content in the aggregate was 60% by weight or more, the water resistance was significantly lowered in Comparative Example 4 in which the high performance additive was not added, and the moisture resistance was significantly improved when the high performance additive was added.

Specifically, when the aggregate having the silica content of 67.9% by weight in the aggregate was used, it was found that Example 14 was 400%, Example 15 was 500%, and Example 16 was 550% when the moisture resistance change rate was calculated. In the case of using an aggregate having a silica content of 67.7% by weight in the aggregate, the rate of water resistance change was calculated to be 1000% for Example 14, 1300% for Example 15 and 1500% for Example 16.

[Example 17]

The moisture resistance according to the mixing temperature is compared and shown in Table 7 below.

0.5 parts by weight of High Performance Additive 2 was added to 100 parts by weight of a petroleum-based asphalt having a compatibility degree of 64-22 according to KS F 2389 (high temperature of 64 캜, low temperature of -22 캜), and 5 Lt; / RTI &gt; and the mixture was stirred for one minute to prepare an asphalt composition.

16 g of the above-prepared asphalt composition and 510 g of aggregate of 11.2 to 8 mm were mixed at 180 ° C, 160 ° C, 125 ° C, 110 ° C and 100 ° C for 3 minutes, respectively. After cooling at room temperature, 150 g of each sample was taken, The mixture was put in a glass bottle and rotated at a rate of 60 times per minute for 24 hours. Then, the amount of the asphalt coated on the aggregate was visually evaluated. Water resistance was based on EN-12697-11 Determination of affinity between aggregate and bitumen.

In the following Table 7, the amount of silica (SiO ₂ ) in the aggregate was analyzed by semi-quantitative analysis using an energy dispersive X-ray fluorescence spectrometer (ED-XRF).

SiO ₂
Content, wt% Moisture resistance (aggregate coverage,%) High Functional Additive 2 180 DEG C 160 ° C 125 ℃ 110 ° C 100 ℃ 67.9 60 60 55 50 40

As shown in Table 7, when the silica content in the aggregate was 67.9% by weight, the water resistance was significantly improved compared with the case where the high functional additive was not added even though the mixing temperature was lowered. Also, it was confirmed that asphalt can be coated evenly at the low temperature.

[Example 18]

1) Preparation of an asphalt composition

0.5 part by weight of High Performance Additive 1 was added to 100 parts by weight of a petroleum modified asphalt having a fuel compatibility modulus of 76-22 according to KS F 2389 and the mixture was stirred at 165 캜 and 400 rpm for 5 minutes to prepare a modified asphalt composition .

2) Preparation of asphalt mixtures and specimens

A modified asphalt mixture satisfying the WC-2 particle size was prepared by mixing 4 wt% of the modified asphalt composition, 66 wt% of a mixture of granite aggregate and limestone filler, and 30 wt% of waste asphalt having a residual asphalt content of 4 wt% .

The modified asphalt mixture was compacted at 145 캜 to prepare a specimen.

The granite aggregate used was one which meets the aggregate specifications according to KS F 2357 and the limestone filler material satisfying the filler standard according to KS F 3501 was used. The WC-2 particle size is a dense asphalt mixture of nominal maximum aggregate size of 13 mm with a maximum aggregate size of 13 mm as proposed by the National Highway Administration of Korea.

The properties are shown in Table 8 below.

[Comparative Example 5]

Example 18 was prepared in the same manner as in Example 18, except that a high-performance additive was not used in preparing the modified asphalt mixture.

That is, a mixture of 4 wt% of petroleum-modified asphalt having a fuel compatibility grade of 76-22 according to KS F 2389, 66 wt% of a mixture of granite aggregate and limestone filler, and 30 wt% of waste asphalt having a residual asphalt content of 4 wt% Were mixed to prepare a modified asphalt mixture satisfying the WC-2 particle size. The modified asphalt mixture was compacted at 145 캜 to prepare a specimen.

The properties are shown in Table 8 below.

Evaluation items Quality standards Comparative Example 5 Example 18 meaning Marshall stability, N More than 8,000 15,520 16,970 Excellent resistance to plastic deformation (strength) Flow value, 1 / 100cm 20 or more 18.2 35.4 Excellent crack resistance Porosity,% 3 to 6 5.5 4.4 Excellent compaction Water resistance (Tensile strength ratio after soaking,%) More than 80 68 92 Excellent water resistance Plastic deformation resistance (dynamic stability, times / mm) 2,000 or more 6,350 9,820 Excellent resistance to plastic deformation (strength)

As shown in Table 8, Example 18 of the present invention was found to have excellent plastic deformation resistance, crack resistance, moisture resistance, and compaction. Generally, waste asbestos is exposed to sunlight and air on roads for a long period of time. As a result, the asphalt in the waste ascon is cured and the mixing performance of the waste asphalt is poor. Thus, the performance of the asphalt mixture deteriorates. When the high- , The mixing property of the filler and the waste asbestos is improved, and the adhesion between the aggregate and the asphalt is improved while the asphalt is uniformly coated on the aggregate.

Claims (22)

Asphalt, aggregate, filler and repeating unit represented by the following general formula (1), wherein at least one of the terminal groups includes the following general formula (2), the total amine content is 100 to 1500 mgKOH / g, the viscosity measured at 25 DEG C is 1500 to 15000 cSt and a nitrogen / oxygen molar ratio of from 0.5 to 4. The high-performance asphalt mixture has improved workability and water resistance.
[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,
In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl. The method according to claim 1,
Wherein the high-performance asphalt mixture comprises 90 to 99 wt% of a mixture of aggregate and filler and 1 to 10 wt% of an asphalt composition comprising asphalt and a high-performance additive. 3. The method of claim 2,
Wherein the asphalt composition comprises 0.05 to 20 parts by weight of a high-performance additive per 100 parts by weight of the asphalt. The method according to claim 1,
Wherein the asphalt is any one or a mixture of two or more selected from the group consisting of natural asphalt, petroleum asphalt, petroleum pitch, cyclic asphalt and modified asphalt. The method according to claim 1,
Wherein said asphalt is selected from those wherein the asphalt-compatible high temperature grade according to KS F 2389 is in the range of 46 to 82 DEG C and the low temperature grade is classified as -10 to -40 DEG C. The method according to claim 1,
Wherein the asphalt comprises any one or a mixture of two or more selected from asphalt regeneration additives, asphalt penetration modifiers and asphalt softeners. 5. The method of claim 4,
The modified asphalt may be a natural rubber, a styrene-butadiene-rubber copolymer, a styrene-butadiene-styrene copolymer, polyethylene, polypropylene, nylon, vinyl chloride, ethylene methacrylate, ethylene propylene rubber, ethylene vinyl acetate copolymer, polybutadiene , Polyisoprene, butyl rubber, styrene-butadiene rubber, polychloroprene rubber, and waste tire reclaimed rubber;
A hydrocarbon-based modifier including one or more selected from wax-based asphalt additives, natural asphalt, petroleum pitch and gilsonite;
&Lt; / RTI &gt; and mixtures thereof. The method according to claim 1,
The filler may be selected from the group consisting of limestone powder, slaked lime, portland cement, recovered dust, fly ash, electric furnace slag, cast dust, carbon black, sulfur, lignin, cellulose fiber, nylon fiber, polyester fiber, polyethylene fiber, A high-performance asphalt mixture which is one or a mixture of two or more selected from polyvinyl alcohol fibers and natural fibers The method according to claim 1,
Wherein the aggregate is selected from natural aggregates, recycled aggregates and mixed aggregates thereof. 10. The method of claim 9,
Wherein the mixed aggregate comprises 0.1 to 70% by weight of recycled aggregate. delete The method according to claim 1,
Wherein the high-performance additive is any one or a mixture of two or more selected from compounds represented by the following general formula (3).
(3)

In Formula 3, n is an integer selected from 0 to 10,
Wherein R ₁ is alkyl of C ₁ -C _30,
A, R &lt; ₂ &gt; and R &lt; ₃ &gt; are each independently hydrogen or

Lt; / RTI &gt;
Wherein A, R ₂ and R ₃ is any one of or two or more be

ego,
Wherein R ₄ is an alkyl of C ₁ -C _30. 13. The method of claim 12,
Wherein the compound of Formula 3 has a weight average molecular weight of 500 to 1500 g / mol. The high-performance asphalt mixture according to any one of claims 1 to 10 and 12 to 13 is used for one or more selected from the surface layer, the intermediate layer and the base layer of the asphalt concrete. mixture. A high-performance asphalt mixture according to any one of claims 1 to 10 and 12 to 13, characterized in that it comprises a heated asphalt mixture, a mesophase asphalt mixture, a recycled asphalt mixture with recycled asphalt, a mesophilic regenerated asphalt mixture and a foaming asphalt mixture &Lt; RTI ID = 0.0 &gt; and / or &lt; / RTI &gt; A high-performance asphalt mixture as claimed in any one of claims 1 to 10 and 12 to 13, characterized in that it comprises at least one of a wheat grain asphalt concrete pavement, a fluid asphalt concrete pavement, an asphalted asphalt concrete pavement, High-performance asphalt mixture for use in asphalt concrete pavement selected from drainage asphalt concrete pavement and crushed stone mastic asphalt concrete pavement. a) an asphalt and a repeating unit represented by the following formula (1), wherein at least one of the terminal groups comprises the following formula (2), the total amine content is 100 to 1500 mgKOH / g, the viscosity measured at 25 DEG C is 1500 to 15000 cSt , And a nitrogen / oxygen molar ratio of 0.5 to 4 to prepare an asphalt composition; And
[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,
In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.
b) mixing the asphalt composition, the aggregate and the filler;
By weight based on the total weight of the asphalt mixture. 18. The method of claim 17,
Wherein the step a) is performed at a temperature of 100 to 190 ° C for 1 to 120 minutes, and the step b) is performed at a temperature of 100 to 190 ° C for 10 to 100 seconds. Asphalt and a repeating unit represented by the following general formula (1), wherein at least one of the end groups has the following general formula (2), the total amine content is 100 to 1500 mgKOH / g, the viscosity measured at 25 DEG C is 1500 to 15000 cSt, Wherein the high functional additive having an oxygen molar ratio of 0.5 to 4 is mixed with an aggregate and a filler, and a method for producing a high-performance asphalt mixture improved in workability and moisture resistance.
[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,
In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl. 20. The method of claim 19,
Wherein the mixing is performed at a temperature of 100 to 190 DEG C for 10 to 100 seconds.

) Wherein at least one of the terminal groups has the following formula (2), the total amine content is 100 to 1500 mgKOH / g, the viscosity measured at 25 DEG C is 1500 to 15000 cSt, and the nitrogen / An oxygen molar ratio of 0.5 to 4, an asphalt regeneration additive, an asphalt penetration modifier and an asphalt softening agent to prepare a high-performance additive composition; And
[Chemical Formula 1]

(2)

Wherein A is selected from the group consisting of hydrogen or the formula 2,
In Formula 2, R ₁ is C ₁ -C ₃₀ alkyl.

Mixing the high-performance additive composition with asphalt, aggregate and filler;
By weight based on the total weight of the asphalt mixture. 22. The method of claim 21,
remind

) Are mixed at a temperature of 40 to 120 DEG C for 1 to 60 minutes,

) Is carried out at a temperature of 100 to 190 DEG C for 10 to 100 seconds.