Eco-friendly regenerated asphalt composition and regenerated asphalt mixture comprising the same

Abstract

2021202987 11 May 2021 same.

Description

Eco-friendly regenerated asphalt composition and regenerated asphalt mixture comprising the same CROSS-REFERENCE TO RELATED APPLICATIONS

[001] This application claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2020-0057833, filed on May 14, 2020, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[002] The following disclosure relates to an eco-friendly regenerated asphalt composition and a regenerated asphalt mixture containing the same, and in particular, to a performance rejuvenation material having specific physical properties, an asphalt composition containing the same, a regenerated asphalt composition, and a regenerated asphalt mixture and a method of preparing the same. BACKGROUND

[003] An asphalt mixture is usually called ascon, and is prepared by injecting asphalt, aggregates, fillers, etc., into an asphalt mixing plant, heating these materials at a high temperature of 160 to 180°C, and then mixing them with each other. Thereafter, the asphalt mixture is paved and compacted on the road, is cooled to room temperature, and is then used for a long time, for example, several years, in a state being exposed to various environments such as sunlight and rainwater.

[004] Therefore, a lot of energy is required for heating these materials at a high temperature, and harmful gases such as carbon dioxide, sulfur oxide, nitrogen oxide, etc., are emitted during manufacture and construction of the asphalt mixture, which may cause environmental pollution and adversely affect the health of workers who pave the road with asphalt.

[005] Further, when paving the road with the asphalt, it takes a lot of time to cool the asphalt mixture produced at a high temperature of 160 to 180°C to room temperature, such that a traffic opening time is delayed and workers are exposed to safety accidents. Furthermore, as the asphalt is produced at a high temperature, oxidation aging proceeds relatively quickly, which causes premature pavement cracking, resulting in shortening of pavement lifespan.

[006] As described above, asphalt concrete for road pavement at the end of its lifespan is classified as industrial construction waste, and a large amount of industrial construction waste is generated every year. Disposal of such a large amount of industrial construction waste requires a vast landfill space and damages the environment, and when asphalt or residual cement, etc., washed away from landfills by rainwater flows into strata, the asphalt or residual cement pollutes groundwater and streams in turn and becomes a major cause of environmental pollution.

[007] Therefore, recycling of Reclaimed Asphalt Pavement (RAP) generated in large quantities has become prominent as an alternative that may reduce environmental pollution and may substitute for an explosively increasing demand for asphalt. As a study on such regenerated ascon has progressed actively, plant hot mix recycling, hot in- place surface recycling etc., have been developed, but both the plant hot mix recycling and the hot in-place surface recycling have a problem in that it is difficult to perform construction at room temperature and the construction should be performed through heating.

[008] In order to overcome such a problem, a study on recycling of Reclaimed Asphalt Pavement in a manner of mixing and utilizing regenerated aggregates derived from the Reclaimed Asphalt Pavement with emulsified asphalt at room temperature has been actively conducted, and at the national level, there has been an effort to increase a recycling rate of the Reclaimed Asphalt Pavement while maintaining a high quality thereof, by selecting the Reclaimed Asphalt Pavement as a designated by-product in order to recycle the Reclaimed Asphalt Pavement and enacting the “Act on the Promotion of Recycling of Construction Waste” and “Quality Standards for Regenerated Aggregate.”

[009] However, the Reclaimed Asphalt Pavement produced by such a recycling method has a problem in that a bonding force between particles is not great at the beginning of construction, such that a mixture at the beginning of construction is easily desorbed, the Reclaimed Asphalt Pavement should be used as heated asphalt or room temperature regenerated asphalt in order to increase effective recycling of the Reclaimed Asphalt Pavement, but in a case of the heated asphalt that requires high heat, a large amount of carbon dioxide is emitted, and cracking or destruction occurs early in paving the road with the heated asphalt. In addition, a distribution of the Reclaimed Asphalt Pavement regenerated aggregate particles is not uniform, such that it is difficult to satisfy a quality standard of the asphalt mixture. That is, since the Reclaimed Asphalt Pavement has a problem in its recycling ability to exhibit lower efficiency compared to new asphalt, a study on a performance Rejuvenation material having more excellent regeneration ability and an asphalt composition containing the same has been required. SUMMARY

[0010] An embodiment of the present invention is directed to providing a performance rejuvenation material having significantly improved regeneration ability, an asphalt composition containing the same, and a regenerated asphalt composition containing the asphalt composition

[0011] Another embodiment of the present invention is directed to providing a regenerated asphalt mixture containing an asphalt composition according to the present invention, a regenerated asphalt composition according to the present invention, or a mixture thereof, and a method of preparing the same.

[0012] In one general aspect, there is provided a performance rejuvenation material having controlled specific components and controlled specific properties, and the performance rejuvenation material contains 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, and has a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C, a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C of 75 to 195, a specific gravity of 0.94 to 1.00, and a flash point of more than 250°C.

[0013] The performance rejuvenation material may have an initial boiling point of 250°C or more.

[0014] The performance rejuvenation material may contain 5 to 25 wt% of saturated hydrocarbons, 60 to 80 wt% of aromatic hydrocarbons, 0.1 to 10 wt% of resins, and 0.1 to 5 wt% of asphaltenes.

[0015] In the performance rejuvenation material, a content (x) of aromatic hydrocarbons and a content (y) of saturated hydrocarbons may satisfy the following Equation 1:

[0016] [Equation 1]

[0017] 2.0 < x / y < 5.5

[0018] In another general aspect, there is provided an asphalt composition containing the performance rejuvenation material as described above.

[0019] That is, the asphalt composition contains:

[0020] a performance rejuvenation material containing 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, and having a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C, a difference between the kinematic viscosity at 60°C and kinematic viscosity at 100°C of 75 to 195, a specific gravity of 0.94 to 0.96, and a flash point of more than 250°C; new asphalt; and an anti-stripping agent.

[0021] The performance rejuvenation material may be contained in an amount of 0.1 to 20 parts by weight, based on 100 parts by weight of new asphalt, and the anti- stripping agent is contained in an amount of 0.01 to 2 parts by weight, based on 100 parts by weight of new asphalt.

[0022] The anti-striping agent may be a compound including a repeating unit of the following Formula 1, and at least one of the terminal groups includes the following Formula 2:

[0023] [Formula 1] A JNA

[0024]

[0025] [Formula 2] ROY OH

[0026]

[0027] where A is selected from hydrogen or Formula 2, and

[0028] rR: is (Cl-C30)alkyl.

[0029] The asphalt composition may have a penetration (1 / 10 mm, 25°C, 100 g, 5 seconds) of 100 to 170 dmm, and an absolute viscosity (60°C) of 600 to 1500 poise.

[0030] In another general aspect, there is provided a regenerated asphalt composition containing the asphalt composition as described above and aged asphalt.

[0031] The regenerated asphalt composition may have a penetration (1 / 10 mm, 25°C, 100 g, 5 seconds) of 60 to 80 dmm, and an absolute viscosity (60°C) of 1500 to 2200 poise.

[0032] The regenerated asphalt composition has a value of ATc (Delta Tc) of 1.8°C or more.

[0033] a value of T..s (300 MPa) -Te.n (0.300) of 1.8°C or more.

[0034] In another general aspect, there is provided a regenerated asphalt mixture, containing the asphalt composition as described above, the regenerated asphalt composition as described above, or a mixture thereof; aged asphalt; and aggregates.

[0035] In another general aspect, there is provided a method of preparing a regenerated asphalt mixture, the method includes: premixing the asphalt composition and the regenerated asphalt composition as described above, or a mixture thereof, and mixing the composition premixed in the premixing with Reclaimed Asphalt Pavement and aggregates.

[0036] The ©premixing of the asphalt composition, the regenerated asphalt composition or a mixture thereof is performed at a temperature of 100 to 190°C for to 120 minutes, and the preparing of the mixture is performed at a temperature of 100 to 190°C for 10 to 100 seconds. DETAILED DESCRIPTION OF EMBODIMENTS

[0037] Hereinafter, the present invention will be described in more detail. Technical terms and scientific terms used herein have the general meaning understood by those skilled in the art to which the present invention pertains, unless otherwise defined, and a description for the known function and configuration unnecessarily obscuring the gist of the present invention will be omitted in the following description.

[0038] 2 “performance rejuvenation material” used herein, which is a composition for regenerating aged asphalt, is usable in all asphalt compositions, and by containing the performance rejuvenation material, the regeneration ability of aged asphalt in all asphalt compositions containing the aged asphalt may be improved.

[0039] An “asphalt composition” used herein refers to a composition, containing novel asphalt, a performance rejuvenation material according to the present invention, and an anti-stripping agent.

[0040] In addition, a “regenerated asphalt composition” used herein refers to a composition, containing an asphalt composition according to the present invention, and aged asphalt.

[0041] Also, a "regenerated asphalt mixture" used herein refers to a composition, containing Reclaimed Asphalt Pavement and aggregate in an asphalt composition according to the present invention, a regenerated asphalt composition according to the present invention, or a mixture thereof. "Aged asphalt" used herein refers to all aged asphalt, such as general asphalt, modified asphalt, regenerated asphalt, etc. In addition, a regenerated asphalt mixture according to the present invention may further contain fillers, etc. When the regenerated asphalt mixture according to the present invention is produced, it may be obtained by adding a performance rejuvenation material according to the present invention, new asphalt, an anti-stripping agent, Reclaimed Asphalt Pavement, and aggregates, respectively, and then mixing the mixtures, and may be obtained by premixing an asphalt composition containing new asphalt, an anti-stripping agent and a performance rejuvenation material with each other, and then injecting Reclaimed Asphalt Pavement, aggregates, fillers, etc., into the premixed mixture. In addition to the above-described method, a regenerated asphalt mixture may be prepared by any method recognized by those skilled in the art.

[0042] Aan "alkyl" used herein refers to an aliphatic hydrocarbon group having 1 to 30 carbon atoms, preferably 1 to 20 carbon atoms. When the alkyl is used alone or in combination, it may be a linear or branched alkyl, respectively. Examples of the linear or branched alkyl specifically include methyl, ethyl, normal propyl, isopropyl, normal butyl, iscbutyl, tert-butyl, normal pentyl, neo-pentyl, normal hexyl, isohexyl, normal heptyl, normal octyl, normal nonyl, normal decyl, etc.

[0043] Hereinafter, an aspect of the present invention will be described in detail.

[0044] The present invention is to provide a performance rejuvenation material capable of significantly improving the regeneration ability of aged asphalt having specific controlled physical properties by containing a specific component in a controlled amount, and the performance rejuvenation material according to the present invention may preferably be a performance rejuvenation material for asphalt

[0045] The performance rejuvenation material according to the present invention contains 25 wt? or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons,

[0046] wherein the performance rejuvenation material has a kinematic viscosity is 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C is 75 to 195, and

[0047] The performance rejuvenation material has a specific gravity is 0.94 to 1.00 and a flash point exceeds 250°C.

[0048] The performance rejuvenation material according to the present invention contains controlled specific components of which contents are controlled, to have specific physical properties, thereby having a significant regeneration ability for aged asphalt.

[0049] Particularly, the performance rejuvenation material according to the present invention, which is an asphalt performance rejuvenation material, contains controlled specific components in a specific amount to have a specific kinematic viscosity range, specific gravity, and flash point in a specific temperature range, thereby having extremely improved regeneration ability.

[0050] In terms of having more improved physical properties, preferably, the performance rejuvenation material according to an embodiment of the present invention contains 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons.

[0051] Preferably, in the performance rejuvenation material according to an embodiment of the present invention, a kinematic viscosity may be 90 to 190 cSt at 60°C and 15 to 35 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C may be 75 to 175.

[0052] The performance rejuvenation material according to an embodiment of the present invention has a specific range of the kinematic viscosity at a specific temperature and has a specific range in which the difference in the kinematic viscosity at two specific temperatures is controlled, thereby having a significantly improved regeneration ability as a performance rejuvenation material for aged asphalt.

[0053] The kinematic viscosity according to an embodiment of the present invention is measured by converting a constant velocity of a liquid flowing in a capillary tube, and is specifically measured at a temperature controlled according to ASTM D445 standard.

[0054] More preferably, in the performance rejuvenation material according to an embodiment of the present invention, a kinematic viscosity may be of 100 to 190 cSt at 60°C and 20 to 35 cSt at 100°C, a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C may be 80 to 170, and an initial boiling point may be greater than 250°C.

[0055] Since the performance rejuvenation material according to an embodiment of the present invention has a high flash point and an initial boiling point, a regenerated asphalt composition containing the performance rejuvenation material and a regenerated asphalt mixture are more eco- friendly in terms of working environment and environment because volatile harmful compounds are less generated when mixing, heating, or applying the regenerated asphalt composition containing the performance rejuvenation material, and the regenerated asphalt mixture.

[0056] Preferably, the performance rejuvenation material according to an embodiment of the present invention may have flash point of 200°C or more, preferably more than 250°C, and more preferably 250 to 350°C, and an initial boiling point of 300°C or more, preferably 350°C or more, and more preferably 350 to 400°C.

[0057] The performance rejuvenation material according to an embodiment of the present invention preferably may contain 5 to 25 wt% of saturated hydrocarbons, 60 to 80 wt% of aromatic hydrocarbons, 0.1 to 10 wt3% of resins, and 0.1 to 5 wt% of asphaltenes. The performance rejuvenation material according to an embodiment of the present invention may contain saturated hydrocarbons, aromatic hydrocarbons, resins, and asphaltenes in the above- described ranges, thereby further improving the regeneration ability of aged asphalt and crack resistance.

[0058] The performance rejuvenation material according to an embodiment of the present invention may preferably contain 10 to 25 wt% of saturated hydrocarbons, 60 to 70 wt% of aromatic hydrocarbons, 5 to 10 wt% of resins, and 0.5 to 3 wt% of asphaltenes.

[0059] The performance rejuvenation material according to the present invention contains and consists of saturated hydrocarbons, aromatic hydrocarbons, resins, and asphaltenes.

[0060] Preferably, the performance rejuvenation material according to an embodiment of the present invention contains 10 to 25 wt% of saturated hydrocarbons, 60 to 70 wt% of aromatic hydrocarbons, 5 to 10 wt% of resins, and 0.5 to 3 wt% of asphaltenes, has physical properties in which a specific gravity is 0.95 to 1.00, a flash point is more than 250°C, an initial boiling point is 300°C or more, a kinematic viscosity is 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C is 75 to 195, and may thus have more improved regeneration ability.

[0061] Preferably, in the performance rejuvenation material according to an embodiment of the present invention, a content (x) of aromatic hydrocarbons and a content (y) of saturated hydrocarbons may satisfy the following Equation 1.

[0062] [Equation 1]

[0063] 2.0 < x / y < 5.5.

[0064] wherein x represents wt% of aromatic hydrocarbons contained in the performance rejuvenation material, and y represents wt% of saturated hydrocarbons contained in the performance rejuvenation material.

[0065] Preferably, in the performance rejuvenation material according to an embodiment of the present invention, a content (x) of aromatic hydrocarbons and a content (y) of saturated hydrocarbons may satisfy the following Equation 2

[0066] [Equation 2]

[0067] 2.5 < x / y < 4.5.

[0068] The performance rejuvenation material according to an embodiment of the present invention has a controlled ratio of the content of aromatic hydrocarbons and the content of saturated hydrocarbons to have a more improved regeneration ability.

[0069] Preferably, the performance rejuvenation material according to an embodiment of the present invention contains 5 to 25 wt% of saturated hydrocarbons, 60 to 70 wt% of aromatic hydrocarbons, 0.1 to 5 wt% of asphaltenes, and 5 to 10 wt% of resins, has a specific gravity of 0.94 to 0.98, a flash point of 250°C or more, a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C of 75 to 115, and may be a composition that satisfies the following Equation 1:

[0070] [Equation 1]

[0071] 2.0 < x / y < 5.5.

[0072] wherein x represents wt% of an aromatic hydrocarbon contained in the performance rejuvenation material, and y represents wt% of a saturated hydrocarbon contained in the performance rejuvenation material.

[0073] In addition, the present invention provides an asphalt composition, containing the performance rejuvenation material according to the present invention, new asphalt, and an anti-stripping agent.

[0074] That is, the present invention provides an asphalt composition, containing a performance rejuvenation material containing 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, and having a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C, a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C of 75 to 115, a specific gravity of 0.94 to 1.00, and a flash point of more than 250°C; new asphalt; and an anti-stripping agent.

[0075] Since the asphalt composition according to the present invention contains the performance rejuvenation material according to the present invention to have high penetration index, and when the asphalt composition is mixed with aged asphalt, the aged asphalt may be regenerated to have physical properties equal to or superior to those of a neat Asphalt mixture.

[0076] Preferably, the performance rejuvenation material according to the present invention may be contained in an amount of 0.1 to 20 parts by weight, more preferably 5 to 15 parts by weight, based on 100 parts by weight of the new asphalt.

[0077] The anti-stripping agent contained in the asphalt composition according to the present invention may be contained in an amount of 0.01 to 2 parts by weight, more preferably 0.05 to 1 part by weight, based on 100 parts by weight of the new asphalt.

[0078] The anti-stripping agent according to an embodiment of the present invention may be a compound including a repeating unit of the following Formula 1 and at least one of terminal groups includes the following Formula 2:

[0079] [Formula 1] A JNA

[0080]

[0081] [Formula 2] OH

[0082]

[0083] wherein

[0084] A is selected from hydrogen or Formula 2, and

[0085] R: is (C1-C30)alkyl.

[0086] The anti-stripping agent according to an embodiment of the present invention is a preferred combination with the performance rejuvenation material according to the present invention, and in terms of having more excellent anti-stripping and softening action, A in Chemical Formulas and 2 is selected from Chemical Formula 2, and Ri may be C5-C20alkyl, and more preferably C8-ClB8alkyl.

[0087] Formula 1, which is an anti-stripping agent according to an embodiment of the present invention, may be a unit derived from a polyamine, Formula 2 may be a unit derived from an alkyl glycidyl ether, and the alkyl glycidyl ether may specifically be a C1-C30 alkyl glycidyl ether and may be a mixture of two or more compounds having different alkyls.

[0088] The polyamine is any one or a mixture of two or more selected from the group of compounds represented by the following Formula 4, but is not limited thereto:

[0089] [Formula 4] \ WH H m

[0020]

[0091] wherein m is 1 to 10.

[0092] More specifically, examples of the polyamine may include any one or a mixture of two or more selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, heptaethyleneoctamine, octaethylenenonamine, nonaethylene decamine, and decaethylene undecamine. In addition, the polaramine may further include an aromatic compound such as aminoethylpiperazine, if necessary.

[0093] More preferably, the polyamine may be, but is not limited to, a mixture containing diethylenetriamine, tetraethylenepentamine, pentaethylenehexamine, hexaethyleneheptamine, and polyethylenepolyamine, and may have a number average molecular weight of 250 to 300 g / mol and an amine content of 1100 to 1300 mg KOH / g.

[0094] In Formula 4, m may be an integer selected from 7 to 10, and preferably, the polyamine according to an embodiment of the present invention may be a mixture of two or more compounds in which m is selected from 7 to 10 in Formula 4.

[0095] The alkyl glycidyl ether is a mixture in which any one selected from the group of compounds represented by the following Formula 5 or two or more compounds having different alkyls are mixed, but is not limited thereto.

[0096] [Formula 5] “NG 0’

[0097]

[0098] wherein Ri; is (C1-C30)alkyl.

[0099] More preferably, Rui may be (C8-Cl8)alkyl in Formula 5.

[00100] More preferably, the alkyl glycidyl ether according to an embodiment of the present invention may be a mixture of two or more compounds having different alkyls in the compound in which Rui is (CB8-Cl8)alkyl in Formula 5 above.

[00101] The anti-stripping agent according to an embodiment of the present invention may be any one or a mixture of two or more selected from the compounds represented by the following Formula 3:

[00102] [Formula 3] R, Rs Ar AN l 4 Ah Ho A Aon

[00103]

[00104] wherein

[00105] n is an integer selected from 0 to 10,

[00106] Ri is (Cl1-C30)alkyl,

[00107] A, Rz, and Rs are each independently selected OH ME “AO, from hydrogen or

[00108] any one or two ore more of A, Rz, and Rs; should OH wa. ~Bep, be and

[00109] R; is (C1-C30)alkyl.

[00110] In Formula 3 according to an embodiment of the present invention, n may be an integer selected from 0 to 10, and more preferably from 3 to 10.

[00111] In addition, when n is 2 or more, A may be the same or different, and may be selected from hydrogen or OH wh “AO respectively.

[00112] The compound of Formula 3 according to an embodiment of the present invention has excellent anti- stripping function, mixability, and compactability in the range of 500 to 1500 g / mol of weight average molecular weight, but is not limited thereto.

[00113] The anti-stripping agent according to an embodiment of the present invention may have a total amine content of 100 to 1500 mg KOH / g, a kinematic viscosity of 1500 to 15000 cSt as measured at 25°C, and a nitrogen / oxygen molar ratio of 0.5 to 4. More specifically, the anti-stripping agent according to an embodiment of the present invention may have a total amine content of 200 to 800 mg KOH / g, a kinematic viscosity of 2000 to 13000 cSt as measured at 25°C, and a nitrogen / oxygen molar ratio of 0.7 to 3.5. In the above range, a mixability of asphalt and aggregates, a compactability, a moisture resistance, etc. of the asphalt mixture may be further improved. The above range may be controlled by the type and content of polyamine and alkyl glycidyl ether.

[00114] The total amine content in the anti-stripping agent according to an embodiment of the present invention may be measured by ASTM D2896, and has an effect on improving the anti-stripping function of asphalt. The above-described effect may be achieved in the range of 100 to 1500 mg KOH / g, and more preferably 200 to 800 mg KOH / g of the total amine content.

[00115] The asphalt composition according to an embodiment of the present invention contains a combination of a specific performance rejuvenation material and a specific anti-stripping agent in new asphalt, such that an absolute viscosity (60°C) of the asphalt composition is lower than that of the conventional asphalt composition when a penetration is adjusted to be the same as that of the conventional asphalt composition, resulting in significant improvement of an softening effect.

[00116] Specifically, the asphalt composition according to the present invention has a high penetration and a low viscosity to have an excellent regeneration performance and a significantly improved softening effect.

[00117] The asphalt composition according to the present invention contains a combination of a performance rejuvenation material having specific properties controlled by containing a specific component in a controlled amount and an anti-stripping agent represented by Formula 1 above to improve the regeneration ability of asphalt and has excellent moisture resistance.

[00118] That is, preferably, the asphalt composition according to an embodiment of the present invention contains the performance rejuvenation material according to the present invention, and may thus have a penetration (1 / 10 mm, 25°C, 100 g, 5 seconds) of 100 to 170 dmm, and an absolute viscosity (60°C) of 600 to 1500 poise. The asphalt composition according to an embodiment of the present invention has a high penetration in the above range to have an excellent regeneration ability, crack resistance, etc., and may have the range of more preferable penetration of 110 to 160 dmm.

[00119] Preferably, the asphalt composition according to the present invention may have a penetration(l1 / 10 mm, 25°C, 100 g, 5 seconds) of 120 to 150 dmm, and an absolute viscosity (60°C) of 600 to 1000 poise.

[00120] In addition, the present invention provides a regenerated asphalt composition, containing an asphalt composition according to the present invention and aged asphalt.

[00121] Specifically, a regenerated asphalt composition according to the present invention contains: an asphalt composition and waster asphalt, wherein the asphalt composition contains a regenerated asphalt mixture containing 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, wherein a kinematic viscosity is 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C is 75 to 195 and a specific gravity is 0.94 to 1.00 and a flash point exceeds 250°C, new asphalt, and an anti-stripping agent.

[00122] The regenerated asphalt composition according to the present invention contains an asphalt composition containing the performance rejuvenation material according to the present invention to have a significantly improved regeneration ability, an excellent moisture resistance, and high penetration index.

[00123] Thus, the regenerated asphalt composition according to the present invention may have a penetration (1 / 10 mm, 25°C, 100 g, 5 seconds) of 60 to 80 dmm, and an absolute viscosity (60°C) of 1500 to 2200 poise before deterioration.

[00124] It can be seen that preferably, the regenerated asphalt composition according to an embodiment of the present invention contains the asphalt composition containing the performance rejuvenation material according to the present invention to have a viscosity (absolute viscosity) of 1600 to 2000 poise before deterioration, and a viscosity of 3200 to 4500 poise after deterioration at 163°C for 5 hours, and that the aged asphalt, which has the same level of physical properties as new asphalt, is regenerated.

[00125] Further, the asphalt composition according to an embodiment of the present invention may has a value of ATc (Delta Tc) of 1.8°C or more, preferably ATc of 0.8 to 3.0°C, and more preferably ATc of 2.0 to 3.0°C.

[00126] It can be seen from the above-described values that the regenerated asphalt composition containing the performance rejuvenation material according to the present invention has a significantly improved regeneration ability.

[00127] The regenerated asphalt composition according to an embodiment of the present invention contains the performance rejuvenation material according to the present invention and an anti-stripping agent to have very excellent crack resistance, compactability, and mixability with aggregates, such that regeneration ability is significantly improved.

[00128] In addition, the present invention provides a regenerated asphalt mixture, containing the asphalt composition according to the present invention, the regenerated asphalt composition according to the present invention, or a mixture thereof; aged asphalt; and aggregates.

[00129] The regenerated asphalt mixture according to an embodiment of the present invention contains the asphalt composition of the present invention, the regenerated asphalt composition of the present invention, or a mixture thereof to have very excellent crack resistance, compactability, and mixability with aggregates, etc., such that regeneration ability is significantly improved.

[00130] Preferably, the regenerated asphalt mixture according to an embodiment of the present invention may further contain compaction materials and fillers.

[00131] Preferably, the regenerated asphalt mixture according to an embodiment of the present invention may contain to 10 wt% of an asphalt composition, a regenerated asphalt composition, or a mixture thereof, 10 to 50 wt% of Reclaimed Asphalt Pavement, and 50 to 80 wt% of aggregates and fillers, and more preferably, may further contain 2 to 5 wt% of an asphalt composition, a regenerated asphalt composition, or a mixture thereof, 25 to 40 wt% of Reclaimed Asphalt Pavement, and 55 to 70 wt% of aggregates and fillers.

[00132] The regenerated asphalt mixture according to the present invention contains an asphalt composition containing a combination of a performance rejuvenation material according to the present invention having specific physical properties controlled by containing a specific component in a controlled amount and an anti-stripping agent represented by Formula 1 above, a regenerated asphalt composition, or a mixture thereof, and thus improves a regeneration ability of Reclaimed Asphalt Pavement to improve a moisture resistance, a compactability, a mixability, and a cracking resistance, such that productivity, workability and asphalt performance are very excellent when applying asphalt using the regenerated asphalt mixture.

[00133] The absolute viscosity of the present invention may be measured by ASTM D445, and is preferably a viscosity range for improving the mixability while having easy fluidity when preparing the regenerated asphalt composition. Specifically, when the viscosity measured at 60°C is in the range of 1500 to 2200 poise, the desired effect may be expressed.

[00134] In addition, the neat Asphalt according to the present invention may be selected from the classification in which an asphalt performance grade at high temperature grade of according to KS F 238% is classified as a high temperature grade of 46 to 82°C and a low temperature grade of -10 to -40°C. An appropriate grade of asphalt is preferably selected depending on climate or traffic conditions of the region in the above range, but is not limited thereto.

[00135] In addition, the regenerated asphalt mixture according to the present invention may further contain any one or a mixture of two or more selected from the group consisting of an asphalt penetration control agent and an asphalt softener in addition to the performance rejuvenation material according to the present invention.

[00136] The asphalt penetration control agent and the asphalt softener are not limited as long as it is a component commonly used in the art, and may specifically include, but are not limited to, for example, one or two or more selected from the group consisting of petroleum-based vacuum distillation process by-products, heavy oil fluidized bed catalytic cracking process by-products deasphaltene process by-products, and lubricating oil-based and animal and vegetable oils.

[00137] The contents of the asphalt penetration control agent and asphalt softener are not limited, but may be 0.05 to 20 parts by weight, preferably 0.1 to 15 parts by weight, and more preferably 0.5 to 12 parts by weight, based on 100 parts by weight of the asphalt composition, and are enough to achieve a desired effect and are suitable in terms of economy in the above range. However, the contents of the asphalt penetration control agent and asphalt softener are not limited thereto.

[00138] In an aspect of the present invention, the regenerated asphalt mixture may further contain any one or a mixture of two or more selected from the group consisting of polymer-based modifiers and hydrocarbon modifiers..

[00139] More specifically, examples of the polymer- based modifiers may include, but are not limited to, any one or a mixture of two or more selected from the group consisting of 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 regenerated rubber. The polymer-based modifier is not limited, but may have a weight average molecular weight of 50,000 to 600,000 g / mol. A content of polymer-based modifier may be 0.5 to 15 wt%, and more preferably 2 to 12 wt% of the modified asphalt content, but is not limited thereto.

[00140] In addition, examples of the hydrocarbon-based modifier may include, but are not limited to, any one or a mixture of two or more selected from the group consisting of Wax-based asphalt additives, natural asphalt, petroleum- based pitch and gilsonite. A content of hydrocarbon-based modifier may be 0.5 to 15 wt%, and more preferably 2 to 12 wt% of the modified asphalt content, but is not limited thereto. The aggregate according to an embodiment of the present invention may be one using a natural aggregate, a regenerated aggregate, and a mixed aggregate thereof. The regenerated aggregate may be, for example, any one or a mixture of two or more selected from the group consisting of aggregates obtained from industrial wastes such as construction waste and steel slag, and Reclaimed Asphalt Pavement (reclaimed asphalt pavement). A content of the mixed aggregate of the natural aggregate and regenerated aggregate may be 30 to 99.9 wt% of the natural aggregate and 0.1 to 70 wt% of the regenerated aggregate, but is not limited thereto.

[00141] The content and size of the aggregate are determined depending on the type and porosity of the pavement to be constructed, ground conditions of the road surface to be constructed, weather conditions, amount of traffic, and the number of lanes, etc., and are therefore not limited. Specifically, for example, the content of the aggregate may be 50 to 80 wt% of the total weight of the regenerated asphalt mixture, but is not limited thereto.

[00142] The aggregate may be used by mixing coarse aggregates and fine aggregates with each other depending on the type of pavement to be constructed.

[00143] The filler according to an embodiment of the present invention may be, but is not limited to, any one or a mixture of two or more selected from the group consisting of limestone powder, slaked lime, portland cement, recovery dust, electric furnace steelmaking dust, casting dust, fly ash, carbon black, sulfur, lignin, cellulose fiber, nylon fiber, polyester fiber, polyethylene fiber, polypropylene fiber, polyvinyl alcohol fiber, and natural fiber. The content of the filler may be changed depending on the type of pavement to be constructed and is therefore not limited. Specifically, for example, the content of the filler may be to 10 wt3% based on the total weight of the regenerated asphalt mixture, but is not limited thereto.

[00144] The content of the aggregate and the filler according to an embodiment of the present invention may be changed depending on the porosity of asphalt to be constructed, etc., and may be 60 to 90 wt% based on the total weight of the asphalt mixture, but is not limited thereto.

[00145] The regenerated asphalt mixture according to an embodiment of the present invention may contain an asphalt composition containing a performance rejuvenation material having a controlled physical property by containing a specific component according to the present invention in a controlled amount, thereby improving the mixability with the aggregate. In addition, in the case of using regenerated aggregates such as Reclaimed Asphalt Pavement aggregates as well as natural aggregates, the regenerated asphalt mixture has greatly improved mixability, compactability, and moisture resistance. The regenerated asphalt mixture according to an embodiment of the present invention may contain 1 to 10 wt%, and more preferably 2 to 5 wt% of the asphalt composition, and is not limited thereto.

[00146] More specifically, the regenerated asphalt mixture according to the present invention may contain 10 to 50 wt% of Reclaimed Asphalt Pavement, 50 to 80 wt% of a mixture of an aggregate and a filler, and 1 to 10 wt% of an asphalt composition containing neat Asphalt and a performance rejuvenation material, and 1s not limited thereto. In addition, the asphalt composition may contain 0.1 to 20 parts by weight of a performance rejuvenation material, based on 100 parts by weight of new asphalt. The above range is sufficient to improve the desired workability and moisture resistance, and is preferable because it is economical, but is not limited thereto.

[00147] The regenerated asphalt mixture according to an embodiment of the present invention may be used without limitation, as long as it is an additive commonly used in the related field, if necessary. Examples of additives used in the regenerated asphalt mixture may include, but are not limited to, any one or two or more selected from the group consisting of wax-based type of warm mix asphalt (WMA) additives, amine-based type of warm mix asphalt (WMA) additives, additional anti-stripping agents, and rejuvenators. In addition, various additives may be further contained depending on the object of the pavement to be constructed.

[00148] The regenerated asphalt mixture according to an embodiment of the present invention may be used for any one or two or more selected from a surface layer, an intermediate layer, and a base layer of asphalt concrete, and is not limited thereto.

[00149] The regenerated asphalt mixture according to an embodiment of the present invention may be used for asphalt concrete pavement selected from dense-graded asphalt concrete pavement, fluid resistant asphalt concrete pavement, coarse-graded asphalt concrete pavement, open- graded asphalt concrete pavement, permeable asphalt concrete pavement and stone mastic asphalt concrete pavement, and is not limited thereto.

[00150] The regenerated asphalt mixture according to an embodiment of the present invention contains the performance rejuvenation material according to the present invention to have physical properties equal to or superior to those of the new asphalt.

[00151] Preferably, the asphalt composition according to the present invention may have a penetration(l1 / 10 mm, 25°C, 100 g, 5 seconds) of 100 to 170 dmm, and preferably 120 to 150 dmm at (1 / 10 mm, 25°C, 100 g, 5 seconds).

[00152] The asphalt composition according to an embodiment of the present invention may have an absolute viscosity (60°C) of 600 to 1500 poise, and preferably 650 to 800 poise.

[00153] The regenerated asphalt composition according to an embodiment of the present invention may have a Tec.s (300 MPa)-Tcn (0.300) value of 1.5°C or more, preferably Tem (300 MPa)-Tewm (0.300) of 1.8°C or more, and more preferably Tem (300 MPa)-Tem (0.300) of 2.0 or more.

[00154] ATc (Delta Tec, °C) as a measure of the regeneration ability of asphalt, 1s an index indicating the flexibility of asphalt, which means a difference between creep stiffness and a m-value of each critical temperature (Te.s (300 MPa)-Te.m (0.300)) in a PG standard. Also, it has been reported in the US that the smaller the value of ATc, the worse the durability (especially crack resistance performance) of aged asphalt. A critical temperature is a value obtained by evaluating a temperature at which the creep stiffness (resistance value for creep load) becomes 300 MPa and a temperature at which the m-value (change in the creep stiffness over time) becomes 0.3 with a Bending Beam Rheometer (BBR) equipment and performing the calculation using Equations 11, 12, and 13.

[00155] [Equation 11] ANTr=Trs— Tem

[00156]

[00157] [Equation 12] ful Joell: Zip =q "Log. S, Logi “By

[00158]

[00159] [Equation 13] 03-m . Itm= I +x ‘IL-1 mm.

[00160]

[00161] The regenerated asphalt composition according to an embodiment of the present invention preferably may have a penetration(1 / 10 mm, 25°C, 100g, 5 seconds) of 60 to 80 dmm, an absolute viscosity (60°C) of 1500 to 2200 Poise, and Te.s (300 MPa)-Ten (0.300) value of 1.5°C or more, and more preferably a penetration(l / 10 mm, 25°C, 100g, 5 seconds) of 65 to 75 dmm, an absolute viscosity (60°C) of 1600 to 2000 poise, and Tes (300 MPa)-Te.m (0.300) value of 1.8 to 2.0°C.

[00162] Next, a method of preparing the regenerated asphalt mixture according to the present invention will be described.

[00163] The method of preparing the regenerated asphalt mixture according to the present invention is not limited as long as it is prepared by containing the performance rejuvenation material according to an embodiment of the present invention, and may be prepared by mixing components contained in the regenerated asphalt mixture.

[00164] Preferably, an aspect of a method of preparing a regenerated asphalt mixture according to the present invention includes:

[00165] premixing the asphalt composition according to the present invention and the regenerated asphalt composition according to the present invention, or a mixture thereof, and

[00166] mixing the asphalt composition, Reclaimed Asphalt Pavement, and aggregates.

[00167] Specifically, the method of preparing a regenerated asphalt mixture according to the present invention includes: premixing neat Asphalt and a performance rejuvenation material containing 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, and having a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C, a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C of 75 to 195, a specific gravity of 0.94 to 1.00, and a flash point of more than 250°C; and

[00168] mixing the asphalt composition, Reclaimed Asphalt Pavement, and aggregates.

[00169] Preferably, the premixing according to an embodiment of the present invention may be performed at a temperature of 100 to 190°C for : to 120 minutes, and the mixing may be performed at a temperature of 100 to 190°C for 10 to 100 seconds.

[00170] Another aspect of a regenerated asphalt mixture according to the present invention may include: mixing an asphalt composition according to the present invention, a regenerated asphalt composition according to the present invention, or a mixture thereof with Reclaimed Asphalt Pavement and aggregates.

[00171] Preferably, the mixing according to an embodiment of the present invention may be performed for 10 to 100 seconds at a temperature of 100 to 190°C.

[00172] Hereinafter, the present invention is described by way of examples and comparative examples for more specific explanation, but is not limited to the following examples.

[00173] The following physical properties were measured by the following measurement methods.

[00174] 1) Aggregate coverage (%) after dynamic water immersion

[00175] An aggregate coverage (3%) after dynamic water immersion was based on EN-12697-11: Determination of the affinity between aggregate and bitumen test method. Specifically, among aggregates described in Examples and Comparative Examples, 510 g of aggregates between 8 and 11 mm and 16 g of asphalt compositions were mixed for 3 minutes at a mixing temperature described in Examples and Comparative Examples, and cooled at room temperature. Thereafter, 150 g of a sample was taken from the resulting mixture, placed in a test glass bottle containing water and rotated for 24 hours at a rate of 60 times per minute, and then the amount of asphalt coated on the aggregates was visually evaluated.

[00176] 2) ATc (Delta Tc, °C)

[00177] ATc was based on AASHTO PP78: Standard Practice for Design Considerations When Using Reclaimed Asphalt Shingles (RAS) in Asphalt Mixtures. Specifically, the ATc was calculated by a difference between creep stiffness and a m-value of each critical temperature (Tec.s (300 MPa)-Teum (0.300) ). After measuring based on AASHTO TPl: Standard Test Method for Determining the Flexural Creep Stiffness of Asphalt Binder Using the Bending Beam Rheometer (BBR) at low temperature (-6°C, -12°C, 18°C, etc.), comparative evaluation was performed by calculating a temperature (Tc.s) at which the creep stiffness of the sample becomes 300 MPa and a temperature (Te..n} at which the m-value becomes 0.3 {Tum}

[00178] 3) Absolute viscosity

[00179] An absolute viscosity was based on ASTM D 3381 test method. In order to measure the absolute viscosity (60°C) of asphalt, the absolute viscosity was calculated by applying a vacuum in a thermostat, and measuring the time passing through a certain section and then multiplying coefficient of the section.

[00180] 4) Kinematic viscosity

[00181] A Kinematic viscosity was based on ASTM D 445: Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity). The kinematic viscosity was calculated as the absolute viscosity divided by the density at the temperature of the sample.

[00182] 5) Penetration index

[00183] Penetration was based on ASTM D 5-06: Standard Test Method for Penetration of Bituminous Materials. The penetration section was evaluated on the basis of denoting the penetrationl that the needle was stabbed at 25°C for 5 seconds with a needle having a load of 100 g and entered the sample by 0.1 mm.

[00184] (6) Flash point

[00185] A flash point was based on ASTM D 92-12a: Standard Test Method for Flash and Fire Points by Cleveland Open Cup Tester. When the sample is heated under certain conditions, the amount of vapor generated was sufficient to make a combustible gas mixture with air on the surface of the sample, and when the flame was approached here, a flash was generated and a temperature of the instantaneously burning sample was evaluated.

[00186] 7) Specific gravity

[00187] A Specific gravity was based on D 70-09: Standard Test Method for Density of Semi-Solid Bituminous Materials, or ASTM D 1298-99: Standard Test Method for Density, Relative Density (Specific Gravity), or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method. The specific gravity was evaluated and calculated using the principle of dividing the mass value per volume of the sample at the measurement temperature (15°C) by the mass value of water per the same volume of the sample at 4°C.

[00188] 8) Dynamic stability (plastic deformation resistance, times / mm)

[00189] A dynamic stability was based on KS F 2374 "Wheel Tracking Test Method of Bitumen Paving Mixture." The number of passes of the test wheel required to deform the asphalt mixture specimen by 1 mm from the surface (for 45 to 60 minutes) was evaluated. At this time, the test temperature was 60°C and the wheel load was based on 686N.

[00190] 9) Toughness (crack resistance)

[00191] A toughness was based on KS F 2382 "Indirect Tensile Strength Test Method of Asphalt Mixture." The area until fracture was calculated and evaluated during a displacement-load evaluation of the asphalt mixture specimen.

[00192] 10) Tensile strength ratio (moisture sensitivity)

[00193] A Tensile strength ratio was based on AASHTO T 283: Resistance of Compacted Asphalt Mixtures to Moisture- Induced Damage. Specifically, asphalt and aggregates were mixed at 160°C for 2 minutes, placed in a mold having a diameter of 101.6 mm, and then swiveled and compacted to have a porosity of 7% at 140°C to prepare a specimen. Then, the tensile strengths before and after immersion were measured and compared. A tensile strength was based on KS F 2382 "Indirect Tensile Strength Test Method of Asphalt Mixture."

[00194] 11) Mixability between asphalt and aggregate

[00195] A Mixability was based on AASHTO T 195-11: Standard Method of Test for Determining Degree of Particle Coating of Asphalt Mixtures. Specifically, the asphalt and aggregates were weighed so that the weight of the asphalt mixture was about 2.5 kg, mixed for 2 minutes at 125°C, and then sieved through a 9.5 mm sieve. Then, a ratio of the coated aggregates was measured based on the total amount of coarse aggregate remaining in the sieve.

[00196] 12) Compactability between asphalt and aggregate

[00197] A compactability was based on the compactability test method using a superpave gyratory compactor (SGC) mentioned in NCHRP Report 691 Mix Design Practices for Warm Mix Asphalt. Specifically, asphalt and aggregates were mixed at 125°C for 2 minutes, placed in a mold having a diameter of 101.6 mm, and then the number of compactions until a porosity became 7% was measured at 115°C using a Superpave gyratory compactor.

[00198] [Example 1] Preparation of performance rejuvenation material

[00199] Atmospheric residual oil was added to a vacuum distillation unit (VDU), and a vacuum distillate containing a large amount of aromatic hydrocarbons effective for recovery performance of aged asphalt in the vacuum distillation process was extracted to prepare a performance rejuvenation material of the present invention, and physical properties thereof are shown in Table 1 below.

[00200] [Table 1] Category Performance rejuvenation material Commercial performance rejuvenation material 0.9318 Specific gravity 0.9586 Kinematic |105.5 |89.s viscosity (cSt) |20.9 |20.5 60°C 100°C Flash point °c) | 294 | 250 Saturated 22 28 TLC / FID(%) hydrogen Saturated hydrogen Aromatic 70 64 hydrogen Resin 6 Asphaltene Z REA

[00201] [Comparative Example 1] Commercial performance rejuvenation material

[00202] Commercial performance rejuvenation materials were used, and physical properties thereof are shown in Table 1 above.

[00203] [Example 2] Preparation of anti-stripping agent

[00204] The anti-stripping agent was prepared by reacting 20 wt% of a polyamine mixture with 80 wt% of an alkyl glycidyl ether of Table 2, and a total amine content was 250 mg KOH / g, a viscosity (25°C) was 7748 cst, a N / O molar ratio was 0.83, and a weight average molecular weight was 1474 g / mol.

[00205] [Table 2] Carbon ~ ~~ ~- ~- ~~ ~~ Tagen | ce cio | cuz | cia | cle | cis we <0.3 <z <65 21~28 4~8 0.5

[00206] [Examples 3 and 4] Preparation of asphalt composition

[00207] The high-penetration asphalt compositions for regenerating with penetration indexes of 102 dmm and 135 dmm, respectively, were prepared by adjusting the content of the performance rejuvenation material prepared in Example based on the neat Asphalt with a penetration degree of 70 dmm.

[00208] Specifically, each of 5 parts by weight (Example 3) and 8 parts by weight (Example 4) of the performance rejuvenation material of Example was mixed with neat Asphalt having a penetration degree of 70 dmm based on a total of 100 parts by weight of the new asphalt. Then, 0.5 parts by weight of the anti-stripping agent prepared in Example 2 (Formula 4) based on a total of 100 parts by weight of neat Asphalt was added thereto and mixed under stirring at a speed of 300 rpm for 30 minutes while maintaining the temperature to prepare an asphalt composition. The physical properties of the asphalt composition were measured and are shown in Table 3 below.

[00209] [Comparative Example 2] High penetration asphalt using commercial performance rejuvenation material

[00210] An asphalt composition was prepared in the same manner as in Example 4, except that the commercial performance rejuvenation material of Comparative Example : was used instead of the performance rejuvenation material of Example 1. The physical properties of the asphalt composition were measured and shown in Table 3 below.

[00211] [Table 3] Example 3 Example 4 Comp. Example 2 Penetration before (163°C, 5h) (drm) before deterioration | 82 | 135 | 135 (163°C, 5h) (drm) Viscosity (60°C, | 2,210 | 6s | 765

[00212] As shown in Table 3, asphalt with a high penetration and a low viscosity may be prepared by adjusting the amount of the performance rejuvenation material according to the present invention, and the asphalt having a low viscosity based on the same penetration compared to Comparative Example 2 prepared using a commercial performance rejuvenation material was produced to have excellent properties in the softening of the waster asphalt.

[00213] [Example 51 Asphalt regeneration effect containing performance rejuvenation material

[00214] In order to simulate the aged asphalt remaining in the Reclaimed Asphalt Pavement, pressure aging treatment (Pressure Aging Vessel, 100°C, 20 MPa) for 40 hours was performed to prepare aged asphalt based on a penetration of 22 dmm and a viscosity of 40,000 poise.

[00215] The performance rejuvenation material of Example 1 and neat Asphalt were added to prepare an asphalt composition, and the aged asphalt prepared by simulating aged asphalt remaining in the Reclaimed Asphalt Pavement was added thereto to prepare a regenerated asphalt composition, which 1s a sample simulating asphalt in regenerated ascon. When the neat Asphalt was mixed with aged asphalt, the amount was determined to have a viscosity of 2000 poise (60°C) level, and a performance rejuvenation material was added to prepare a regenerated asphalt composition.

[00216] Specifically, a 22 dmm sample with a penetration of 30 wt% of aged asphalt was heated to 160°C so that a total of 100 wt% was added, and 70 wt% of neat Asphalt was added to the aged asphalt and mixed. 8 parts by weight of the performance rejuvenation material of Example 1 was mixed based on a total of 100 parts by weight of new asphalt, 0.5 parts by weight of the anti-stripping agent prepared in Example 2 (Formula 4) was added thereto based on a total of 100 parts by weight of new asphalt, and mixed under stirring at a speed of 300 rpm for 30 minutes while maintaining the temperature to prepare a regenerated asphalt composition.

[00217] The physical properties of the prepared regenerated asphalt composition were measured and are shown in Table 4 below.

[00218] [Comparative Example 3]

[00219] A regenerated asphalt composition was prepared in the same manner as in Example 5, except that the aged asphalt and the performance rejuvenation material prepared in Example were not added. The physical properties of the new un-aged asphalt were measured and are shown in Table 4 below.

[00220] [Comparative Example 4]

[00221] A regenerated asphalt composition was prepared in the same manner as in Example 5, except that the commercial performance rejuvenation material of Comparative Example I was used instead of the performance rejuvenation material of Example 1. The physical properties of regenerated asphalt composition were measured and shown in Table 4 below.

[00222] [Table 4] Comp. Comp. | Example 5 Example 3 Example 4 Penetration before (163°c, | 71 deterioration (163°C, 71 70 | 71 5h) (dmm) Viscosity (60°C, (60°C, poise) deterioration | 1980 before deterioration 1980 | 2,000 | 1940 (163°C, 5h) (dmm) Viscosity after | deterioration (163°C, | 5h) (dmm) standard: | #, 860 5h) (dmm) | (domestic standard: Th | 3900 | 3,690 5,000 or less, 60°C, | poise) ATc after deterioration | 5.5 41 ~O~ Cw oy tO Ny * Alc arter deterioration 2.3 2.3 0.9 (163°C, 5h) (°C)

[00223] It «can be seen from Table 4 that the regenerated asphalt composition according the present invention has physical properties equal to or superior to the neat Asphalt mixture (Comparative Example 3), and contains a performance rejuvenation material having specific properties by adjusting specific components and the content thereof, so that ATc, an index indicating flexibility that is being studied and reported in the United States, is the level of new asphalt. Thus, it can be seen that the regenerated asphalt composition according to the present invention has very excellent regeneration ability.

[00224] Specifically, the regenerated asphalt composition according to the present invention contains a specific performance rejuvenation material according to the present invention to have a high penetration index, good miscibility with other components and excellent crack resistance, and be eco-friendly.

[00225] Furthermore, it can be seen that the regenerated asphalt composition according to the present invention has significantly improved moisture resistance by containing a specific anti-stripping agent.

[00226] [Example 6] Preparation of regenerated asphalt specimen using regenerated asphalt mixture

[00227] 2.76 wt%¥ of a high penetration asphalt composition using the performance rejuvenation material of Example 4, 30.00 wt% of on-site Reclaimed Asphalt Pavement (Reclaimed Asphalt Pavement viscosity: 24,000 poise), and 67.24 wt% of new aggregates and limestone fillers were mixed at 160°C to prepare a mixture of regenerated asphalt specimens satisfying an WC-3 particle size.

[00228] The Reclaimed Asphalt Pavement was used that satisfies a quality standard of regenerated aggregate according to KS F 2572, the aggregate was used that satisfies an aggregate standard according to KS F 2357, and the limestone filler was used that satisfies a filler standard according to KS F 3501. The WC-3 particle size is a standard suggested by the Ministry of National Highway and Transportation, and is a dense-graded asphalt mixture of 20 mm nominal maximum aggregate size.

[00229] The regenerated asphalt specimen mixture was compacted at 145°C to prepare an asphalt specimen. The physical properties of the specimen were measured as described above, and are shown in Table 5 below.

[00230] [Comparative Example 5]

[00231] A specimen was prepared in the same manner as in Example 6, except that the asphalt composition of Comparative Example 4 containing a commercial performance rejuvenation material was used instead of using the asphalt composition of Example 4. The physical properties of the specimen were measured and shown in Table 5 below.

[00232] [Table 5] (Ministry Infrastructure and | Example 6 of Comp. and | Example 6 ss 5 |1,862 or 1,936 _—_ — inn Dynamic etorma stability resistance or | 16,553 atl Crack ? Toughness resistance

[00232] [Table 5] i Standard (Ministry of | or Land, Infrastructure and gory Transport) Plastic : 750 or i Dynamic deformation ploy: more, : stability . resistance times / mm Crack 8,000 or : | Toughness resistance more, N-mm 1 Tensile [Moisture | Tensile |0.75 or | : : Viscosity Viscosity ALCOR 500 . 4222 | 4,320 recovery ; less, poise extraction ©, UUuU or Czaclk | Toughness ’ 16,953 14,036 resistance more, N-mm ‘ Tensile Moisture | . ength C.7% or | 0.82 0.61 sensitivity | "00 more " ' Viscosity Tomy ame (R00 oleae fem ¥ extraction +P e222 8&8

[00233] [Table 6] Quality | Comp. Performance | | Example 6 category | standards | Bam: LS at | standards | Example 5 (2 95 or more [99.5 |o2.5 % Mixability between asphalt an aggregate times number mes of ctions d on | _ voids, n UL LUlikoe UL Compactabil compactions ity between (paged on | _ 16 5 [19 5 asphalt and 7g voids, : : aggregate ggreg 118°CY

[00234] It can be seen that the regenerated asphalt mixture according to the present invention contains a combination of the performance rejuvenation material according to the present invention and the anti-stripping agent according to the present invention to have very improved values in plastic deformation resistance, crack resistance, moisture sensitivity, viscosity recovery, mixability, and compactability compared to the regenerated asphalt mixture containing a commercial performance rejuvenation material.

[00235] Since the performance rejuvenation material according to the present invention contains a controlled specific component in a controlled amount and has specific controlled physical properties, the regenerated asphalt mixture containing the performance rejuvenation material has excellent properties equal to or higher than those of a new asphalt.

[00236] In addition, the performance rejuvenation material according to the present invention is very eco- friendly because it generates less harmful compounds such as volatile organic compounds (VOCs) due to high flash point and initial boiling point.

[00237] Thus, the asphalt composition according to the present invention contains the performance rejuvenation material according to the present invention having controlled components and physical properties to have a high penetration and an excellent viscosity range. Therefore, the regenerated asphalt composition containing the asphalt composition has very excellent regeneration ability.

[00238] In addition, the regenerated asphalt composition according to the present invention has a regeneration ability in strength, viscosity, stability, flexibility, etc., equal to or superior to physical properties of a neat Asphalt composition.

[00239] Further, the regenerated asphalt composition according to the present invention contains the asphalt composition according to the present invention to have a good mixability with Reclaimed Asphalt Pavement and other components and an excellent regeneration ability.

[00240] Furthermore, the regenerated asphalt mixture containing the asphalt composition according to the present invention, the regenerated asphalt composition according to the present invention, or a mixture thereof has excellent regeneration ability, improved adhesion, and enhanced moisture resistance. Therefore, a paved road constructed using the regenerated asphalt mixture is very economical due to extended lifespan and reduced maintenance costs, and has excellent plastic deformation resistance, crack resistance, mixability with aggregates, and compactability.

Claims

WHAT IS CLAIMED IS:

1. A performance rejuvenation material comprising: 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, wherein the performance rejuvenation material has a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C is 75 to 195, and the performance rejuvenation material has a specific gravity of 0.94 to 1.00 and a flash point of more than 250°C.

2. The performance rejuvenation material of claim 1, wherein the performance rejuvenation material has an initial boiling point of 250°C or more. 3 The performance rejuvenation material of claim 1, wherein the performance rejuvenation material contains 5 to 25 wt% of saturated hydrocarbons, 60 to 80 wt% of aromatic hydrocarbons, 0.1 to 10 wt?% of resins, and 0.1 to 5 wt% of asphaltenes. 4, The performance rejuvenation material of claim 3, wherein in the performance rejuvenation material, a content (x, wt%) of aromatic hydrocarbons and a content (y, wt%) of saturated hydrocarbons satisfy the following Equation 1: [Equation 1] 2.0 < x / y < 5.

5.

5. An asphalt composition comprising: neat asphalt; an anti-stripping agent; and a performance rejuvenation material containing 25 wt% or less of saturated hydrocarbons and 60 wt% or more of aromatic hydrocarbons, the performance rejuvenation material having a kinematic viscosity of 80 to 200 cSt at 60°C and 5 to 40 cSt at 100°C, and a difference between the kinematic viscosity at 60°C and the kinematic viscosity at 100°C of 75 to 195, a specific gravity of 0.94 to 1.00, and a flash point of more than 250°C.

6. The asphalt composition of claim 5, wherein the performance rejuvenation material is contained in an amount of 0.1 to 20 parts by weight, based on 100 parts by weight of new asphalt. 7s The asphalt composition of claim 5, wherein the anti- stripping agent is contained in an amount of 0.01 to 2 parts by weight, based on 100 parts by weight of new asphalt. 8 The asphalt composition of claim 5, wherein the anti- striping agent is a compound including a repeating unit of the following Formula 1, and at least one of the terminal groups includes the following Formula 2: [Formula 1] A JNA [Formula 2] RON CH wherein A is selected from hydrogen or Formula 2, and Ri is (Cl-C30)alkyl. 9 The asphalt composition of claim 5, wherein the asphalt composition has a penetration(1 / 10 mm, 25°C, 100 gq, 5 seconds) of 100 to 170 dmm, and an absolute viscosity (60°C) of 600 to 1500 poise.

10. A regenerated asphalt composition comprising the asphalt composition of any one of claims 5 to 9 and aged asphalt. Lis The regenerated asphalt composition of claim 10, wherein the regenerated asphalt composition has a penetration (1 / 10 mm, 25°C, 100 g, 5 seconds) of 60 to 80 dmm, and an absolute viscosity (60°C) of 1500 to 2200 poise.

12. The regenerated asphalt composition of claim 10, wherein the regenerated asphalt composition has a value of ATc (Delta Tc) of 1.8°C or more. (where ATc (Delta Tc) is Te.s (300 MPa)-Te.n(0.300), Tc.s(300 MPa) is a temperature at which creep stiffness of a sample becomes 300 MPa, and Tem(0.300) is a temperature at which a change in creep stiffness of a sample becomes 0.3 }. 13 A regenerated asphalt mixture comprising: the asphalt composition of any one of claims 5 to 8, the regenerated asphalt composition of claim 10, or a mixture thereof; Reclaimed Asphalt Pavement; and aggregates.

14. A method of preparing a regenerated asphalt mixture, the method comprising: premixing the asphalt composition of any one of claims 5 to 9 and the regenerated asphalt composition of claim 10, or a mixture thereof, and mixing the composition premixed in the premixing with Reclaimed Asphalt Pavement and aggregates.

15. The method of claim 14, wherein the premixing is performed at a temperature of 100 to 190°C for to 120 minutes, and the mixing is performed at a temperature of 100 to 190°C for 10 to 100 seconds.