Adhesion-enhanced asphalt regenerant as well as preparation method and application thereof

Abstract

The invention discloses an adhesion-enhanced asphalt regenerant as well as a preparation method and application thereof, the regenerant is prepared from the following components in parts by mass: 10 parts of base oil, 2-3 parts of tackifying component and 0.1 part of storage stabilizer. The base oil component can supplement and adjust the proportion of light components of the aged asphalt, has a softening effect on the aged asphalt, and is beneficial to restoring the low-temperature performance of the aged asphalt; and the tackifying component can improve the viscosity of the asphalt and increase the viscosity between the asphalt and between the asphalt and the aggregate, so that the oil flooding phenomenon is reduced. The asphalt regenerant disclosed by the invention can be used for regenerating aged asphalt, and the phenomenon of oil flooding caused by rolling in the construction process of a recycled asphalt pavement is solved by increasing the adhesion performance between the asphalt and aggregate, so that the pavement construction quality is improved.

Description

[0001] Technology Neighborhood

[0002] The present invention relates to the technical field of asphalt pavement materials, and in particular to an asphalt regeneration agent and a preparation method thereof. Technical Background

[0003] Asphalt recycling technology is a mature pavement maintenance method. It is widely used in the maintenance of national and provincial trunk roads because it can comprehensively consider factors such as the performance of the original pavement materials of asphalt mixtures, traffic conditions and design parameters.

[0004] Compared to newly built asphalt pavements, the material properties of recycled asphalt pavements undergo significant changes due to the incorporation of recycled asphalt aggregate (RAP). The addition of RAP not only complicates the rheological and adhesion properties of the recycled mixture but also presents the critical challenge of fusing the old and new asphalt. On the one hand, aged asphalt hardens and becomes brittle, reducing the flexibility of the mixture and exacerbating stress concentration at the interface between the asphalt and the aggregate, leading to a decrease in adhesion. On the other hand, the compatibility of the new and old asphalt is a prominent issue. If the fusion is not sufficient, a weak zone will form in the interface area, creating conditions for asphalt migration and oil spillage. In addition, as a lightweight component, the regeneration agent may become a cause of oil spillage if it does not adhere well to the new and old asphalt. Summary of the Invention

[0005] The present invention aims to provide an adhesion-enhanced asphalt regeneration agent and a preparation method thereof, which can improve the adhesion performance of the regenerated asphalt mixture to a certain extent while restoring the road performance of the aged asphalt mixture, thereby reducing the oiling phenomenon on the road surface and improving the quality of road regeneration.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solution: an adhesion-enhanced asphalt rejuvenator, whose raw materials, calculated by mass, are: 10 parts of base oil, 2-3 parts of a viscosity-increasing component, and 0.1 part of a storage stabilizer; the base oil is tall oil with an aromatic content of more than 60%; the viscosity-increasing component is an SIS polymer; and the storage stabilizer is a light stabilizer and an antioxidant.

[0007] Furthermore, the storage stabilizer is a mixture of BASF light stabilizer 770 and BASF antioxidant 1010 of equal mass.

[0008] Furthermore, the SIS polymer is a linear styrene-isoprene-styrene triblock copolymer, wherein the styrene content is 15% to 20% by weight, the isoprene content is 80% to 85% by weight, and the number average molecular weight of the SIS polymer is 80,000 to 120,000 g / mol.

[0009] The preparation method of the adhesion-enhanced asphalt regenerant comprises the following steps: 10 parts of base oil are preheated in an oven at 130-150 DEG C for 30 minutes, 2-3 parts of tackifying component are added, a high-speed shearing machine is used to shear at 150-160 DEG C at 3000-4000 rpm per minute for 30 minutes, 0.1 part of storage stabilizer is added, and shearing is carried out under the same conditions for 5 minutes, and then cooling to room temperature to obtain the adhesion-enhanced asphalt regenerant.

[0010] The adhesion-enhanced asphalt regenerant can be used for the regeneration of aged asphalt, and the mixing amount is 5% of the mass of the asphalt.

[0011] Compared with the prior art, the adhesion-enhanced asphalt regenerant has the following beneficial effects:

[0012] (1) The tackifying component SIS polymer can effectively increase the fusion degree of the regenerant and the aged asphalt, increase the viscosity of the regenerated asphalt, increase the adhesion between the regenerated asphalt and the aggregate through the physical crosslinking network, and reduce the possibility of road oiling.

[0013] (2) The isoprene segment in SIS contains a methyl side chain, which gives the molecular chain higher flexibility and free volume. The SIS molecule can be closely combined with the asphalt molecule to improve the flexibility of the regenerated asphalt, thereby improving the low-temperature performance of the regenerated asphalt.

[0014] (3) The viscosity and fluidity of the adhesion-enhanced asphalt regenerant at different temperatures meet the requirements of different construction stages of pavement regeneration. In the paving and mixing stage, the adhesion-enhanced asphalt regenerant has good fluidity, good diffusion and melting effect, and ensures the workability; in the rolling stage, the viscosity of the adhesion-enhanced asphalt regenerant decreases rapidly with the decrease of temperature, the light components in the regenerated asphalt mixture are fixed between the aggregates, and the migration of the light components is reduced.

[0015] (4) The synergistic effect of tall oil and SIS, the fatty acid and rosin acid in tall oil are a kind of surfactant, which can reduce the interfacial tension between SIS and asphalt matrix, and promote the uniform dispersion of SIS. The polar group of rosin acid can also interact with the isoprene segment in SIS to form a more stable microstructure, the low molecular components in tall oil can soften the isoprene phase of SIS, improve the flexibility and fatigue resistance, and at the same time maintain the elastic recovery ability; the high lubricity and low viscosity characteristics of tall oil can reduce the melt viscosity of SIS during processing, improve the fluidity, make the mixed system more easily coated or extruded, and make the construction of regenerated asphalt more convenient. DETAILED DESCRIPTION

[0016] The adhesion-enhanced asphalt regenerant, high-performance regenerated asphalt and preparation method thereof comprise the following steps:

[0017] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the embodiments. The embodiments listed in the present application are only used to illustrate the present application, and are not used to limit the scope of the present application. Any obvious modification or change made to the present application does not deviate from the spirit and scope of the present application.

[0018] The aged asphalt used in the following embodiments is obtained by aging the commercially available 70# base asphalt (25℃ penetration of 6.8mm, softening point of 49℃, 15℃ ductility of 165.1cm) through a rotary thin film oven aging (RTFOT, condition: 163℃, 85min; used to simulate the short-term aging of SBS modified asphalt occurring during mixing, transportation, paving and rolling) and pressure aging vessel aging (PAV, condition: 100℃, 2.1MPa, 20h; used to simulate the long-term aging of SBS modified asphalt occurring during road use), and the performance thereof is as follows: 25℃ penetration of 1.9mm, softening point of 60.7℃, 15℃ ductility of 2.1cm.

[0019] The amount of the rejuvenator in the aged asphalt and the aged asphalt mixture should be determined according to the aging condition of the aged asphalt and the aged asphalt mixture. In the present application, the amount of the rejuvenator in the long-term aged asphalt and the aged asphalt mixture is determined to be 5% according to the three index data of the aged asphalt.

[0020] After the adhesion-enhanced asphalt rejuvenator is prepared through the following embodiments, a number of portions of the above-prepared aged asphalt are weighed, heated to a flow state in an oven at 190℃, and then 5% of the adhesion-enhanced asphalt rejuvenator by mass of the long-term aged asphalt is added thereto. Then, the aged asphalt with the added rejuvenator is regenerated by continuously stirring at a temperature of 180℃ and a rotation speed of 2000rmp / min for 30min to obtain adhesion-enhanced regenerated asphalt. The performance test of the regenerated asphalt involved in the following embodiments is operated according to the current standard “Highway Engineering Asphalt and Asphalt Mixture Test Procedures” (JTG E20-2011). The above operation is not repeated in each embodiment, and the test results of the embodiments are listed in Table 1 for comparison.

[0021] Example 1:

[0022] (1) Take toluene oil 10 parts, tackifying component 2 parts, storage stabilizer 0.1 part by mass fraction, for standby; the aromatic fin content in toluene oil is more than 60%; the tackifying component is SIS polymer, the SIS polymer is linear structure styrene-isoprene-styrene three block copolymer, in the SIS polymer, the styrene mass content is 15% to 20%, the isoprene mass content is 80% to 85%, the number average molecular weight of the SIS polymer is 100000 g / mol, optionally 80000 to 120000 g / mol; in the storage stabilizer, each of BASF light stabilizer 770 and BASF antioxidant 1010 is 0.5 part (in examples 1-10, the same kind of toluene oil, SIS polymer and storage stabilizer is used, only the amount is different); the light stabilizer type is BASF light stabilizer 770 (LS-770), the molecular formula is C 28 H 52 O4N2, the manufacturer is BASF China Co., Ltd. in Germany; the antioxidant type is BASF antioxidant 1010, the molecular formula is C 73 H 108 O 12 , the manufacturer is BASF China Co., Ltd. in Germany; the SIS polymer adopts type SIS1106, the number average molecular weight is 100000 g / mol, the manufacturer is SINOPEC Baling Petrochemical Co., Ltd., the styrene content is 15wt%.

[0023] (2) Preheat the toluene oil in the oven at 130 DEG C for 30 minutes; add 2 parts of tackifying component, use a high-speed shearing machine to shear at 150 DEG C at 3000 rpm per minute for 30 minutes; add 0.1 part of storage stabilizer, shear for 5 minutes under the same conditions, cool to room temperature to obtain the adhesion-enhanced asphalt regenerant.

[0024] Example 2:

[0025] (1) Take toluene oil 10 parts, tackifying component 2.3 parts, storage stabilizer 0.1 part by mass fraction, for standby;

[0026] (2) Preheat the toluene oil in the oven at 135 DEG C for 35 minutes; add 2.3 parts of tackifying component, use a high-speed shearing machine to shear at 155 DEG C at 4000 rpm per minute for 30 minutes; add 0.1 part of storage stabilizer, shear for 5 minutes under the same conditions, cool to room temperature to obtain the adhesion-enhanced asphalt regenerant.

[0027] Example 3:

[0028] (1) Take toluene oil 10 parts, tackifying component 2.5 parts, storage stabilizer 0.1 part by mass fraction, for standby;

[0029] (2) The tall oil was preheated in an oven at 140°C for 30 minutes; 2.5 parts of tackifying component was added, and sheared at 155°C at 3400 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0030] Example 4:

[0031] (1) The tall oil 10 parts, tackifying component 2.8 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0032] (2) The tall oil was preheated in an oven at 145°C for 30 minutes; 2.8 parts of tackifying component was added, and sheared at 155°C at 3800 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0033] Example 5:

[0034] (1) The tall oil 10 parts, tackifying component 3 parts, storage stabilizer 0.2 parts were weighed according to the mass fraction, and prepared for use;

[0035] (2) The tall oil was preheated in an oven at 140°C for 40 minutes; 3 parts of tackifying component was added, and sheared at 160°C at 3500 rpm per minute for 30 minutes using a high-speed shearing machine; 0.2 part of storage stabilizer was added, and sheared at the same condition for 10 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0036] Example 6:

[0037] (1) The tall oil 10 parts, tackifying component 1.6 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0038] (2) The tall oil was preheated in an oven at 150°C for 30 minutes; 1.6 parts of tackifying component was added, and sheared at 155°C at 3500 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0039] Example 7:

[0040] (1) The tall oil 10 parts, tackifying component 1.0 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0041] (2) The tall oil was preheated in an oven at 130°C for 30 minutes; 1.0 part of tackifying component was added, and sheared at 165°C at 3600 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0042] Example 8:

[0043] (1) The tall oil 10 parts, tackifying component 0.8 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0044] (2) The tall oil was preheated in an oven at 160°C for 30 minutes; 1.0 part of tackifying component was added, and sheared at 158°C at 3400 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0045] Example 9:

[0046] (1) The tall oil 10 parts, tackifying component 3.3 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0047] (2) The tall oil was preheated in an oven at 150°C for 30 minutes; 3.3 parts of tackifying component was added, and sheared at 168°C at 3300 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0048] Example 10:

[0049] (1) The tall oil 10 parts, tackifying component 3.5 parts, storage stabilizer 0.1 part were weighed according to the mass fraction, and prepared for use;

[0050] (2) The tall oil was preheated in an oven at 150°C for 30 minutes; 3.5 parts of tackifying component was added, and sheared at 150°C at 3600 rpm per minute for 30 minutes using a high-speed shearing machine; 0.1 part of storage stabilizer was added, and sheared at the same condition for 5 minutes, and cooled to room temperature to obtain the adhesion-enhanced asphalt rejuvenator.

[0051] Comparative Example 1:

[0052] The aging asphalt was rejuvenated by using a commercially available rejuvenator, and the rejuvenation effect was compared with that of the adhesion-enhanced asphalt rejuvenator. The brand of the commercially available rejuvenator was: Wanbang SBS / K30, the manufacturer was: Hebei Xinnanbang High Polymer Material Science and Technology Co., Ltd., and the main component was: naphthenic rubber oil. The addition amount of the commercially available rejuvenator was 0.5% of the mass of the aging asphalt.

[0053] Comparative Example 2:

[0054] The 70# base asphalt after long-term aging is added with new 70# base asphalt without aging to obtain the regenerated asphalt, and the addition amount of the new 70# base asphalt is 5% of the mass of the 70# base asphalt after aging.

[0055] The unaged asphalt, the aged asphalt, the regenerated aged asphalt added with the adhesion-enhancing asphalt regenerant (Examples 1-10), the aged asphalt added with the commercial regenerant (Comparative Example 1), and the regenerated asphalt of the aged 70# base asphalt added with new 70# base asphalt (Comparative Example 2) are compared, and the data of each are shown in Table 1.

[0056] Table 1 Test results of the penetration, softening point and ductility of the asphalt

[0057]

[0058] As can be seen from the examples and comparative examples in Table 1, the adhesion-enhancing asphalt regenerant has a greater performance improvement effect on the three major indicators of the regenerated aged asphalt, indicating that the adhesion-enhancing asphalt regenerant can effectively restore the road performance of the aged asphalt. When the dissolved mass of the SIS polymer in the base oil fraction is 15-25% of the mass of the oil fraction, the effect is better, and the corresponding base oil fraction is 10 parts and the tackifying component is 2-3 parts. Within the dosage ratio range, the base oil fraction and the tackifying component have a good synergistic effect.

[0059] The penetration of the regenerated asphalt in Examples 1-10 decreases with the increase of the tackifying component, and the softening point increases with the increase of the tackifying component, indicating that the SIS polymer increases the hardness and high-temperature performance of the regenerated asphalt; and the ductility increases first and then decreases with the increase of the tackifying component, indicating that excessive SIS polymer will harden the asphalt and reduce the ductility of the regenerated asphalt.

[0060] The results of Comparative Example 2 show that the regeneration effect using new asphalt is limited, and the recovery degree of the three major indicators is not as good as that of the adhesion-enhancing asphalt regenerant.

[0061] Further test the viscosity improvement effect of the adhesion-enhancing asphalt regenerant on the asphalt, and the Brookfield rotational viscosity test is used to measure the viscosity at different construction stage temperatures, and the test results are shown in Table 2.

[0062] Table 2 Test results of the rotational viscosity of the asphalt

[0063]

[0064] As shown in Table 2, the viscosity of the long-term aged asphalt is increased by 222.1% compared with the base asphalt at 105℃, which is due to the fact that the asphalt is in an elastic state at this temperature, and the viscosity of the asphalt increases with the increase of the content of asphaltene. At 165℃ and 150℃, the viscosity of the long-term aged asphalt is close to that of the base asphalt.

[0065] The rejuvenator dilutes the concentration of asphaltene by supplementing the light components (such as aromatic components and saturated components), and the viscosity of the rejuvenated asphalt of Examples 1-10 and Comparative Example 1 is reduced compared with the long-term aged asphalt when the temperature is at 135℃ and 105℃. The viscosity reduction of the aged asphalt by the adhesion-enhancing rejuvenator is better than that of Comparative Example 1, which can effectively prevent the phenomenon that the light components migrate to the road surface under external force, but both are still much higher than the level of the 70# base asphalt.

[0066] When the temperature rises to 135℃, the asphalt enters the Newtonian fluid state, and the viscosity difference is significantly reduced due to the intense molecular thermal motion. The viscosity of the rejuvenated asphalt of Examples 1-10 is close to that of the 70# base asphalt, indicating that the adhesion-enhancing asphalt rejuvenator will not affect the construction and workability of the asphalt during the mixing and paving stages.

[0067] Further test the effect of the adhesion-enhancing asphalt rejuvenator on the adhesion performance of the aged asphalt, use the asphalt pull-out test to test the adhesion between the rejuvenated asphalt-aggregate and the rejuvenated asphalt-aged asphalt during the pavement recycling process, the test results are shown in Table 3;

[0068] Table 3 Results of asphalt pull-out test

[0069]

[0070]

[0071] As shown in Table 3, the adhesion of the long-term aged asphalt is much smaller than that of the 70# base asphalt, indicating that aging can reduce the adhesion performance of the asphalt. The adhesion of Examples 1-8 increases with the increase of the tackifying component, while the adhesion of Examples 9-10 decreases with the increase of the tackifying component, which is due to the fact that excessive tackifying component will convert the asphalt into an elastic substance, which in turn reduces the adhesion performance of the rejuvenated asphalt, therefore the mass fraction of the tackifying component should not be too large.

[0072] Further test the effect of the adhesion-enhancing asphalt rejuvenator on the oil bleeding phenomenon of the rejuvenated asphalt mixture, use the rotary compaction oil spot quantification test to test, and quantify the oil bleeding phenomenon by the area ratio of the oil spot, the test results are shown in Table 4;

[0073] Table 4 Results of rotary compaction oil spot quantification test

[0074] Sample Oil spot area ratio / % Unaged asphalt 22.2 Long-term aged asphalt 15.5 Example 1 26.1 Example 2 25.8 Example 3 25.2 Example 4 24.6 Example 5 23.4 Example 6 27.1 Example 7 27.5 Example 8 28.1 Example 9 22.6 Example 10 21.4 Comparative Example 1 35.7 Comparative Example 2 26.7

[0075] After adding the rejuvenator, the oil spot area ratio of the rejuvenated mixture is significantly increased, and the oil spot area ratio of the asphalt mixture of Comparative Example 1 reaches 35.7%, which is 230.3% of the long-term aged asphalt mixture, indicating that the addition of the rejuvenator will increase the risk of oil bleeding. After adding the adhesion-enhanced asphalt rejuvenator, the oil spot area ratio of Examples 1-10 is 26.1%-21.4%, which is lower than that of Comparative Example 1, which shows that the adhesion-enhanced asphalt rejuvenator can effectively improve the adhesion and stability of the asphalt binder and reduce the separation during compaction.

[0076] Further compare the performance improvement effect of the adhesion-enhanced asphalt rejuvenator, the low-temperature beam test is used for testing, and the maximum bending tensile strain is quantified, and the test results are shown in Table 5.

[0077] Table 5: Low-temperature beam test results

[0078] Sample Maximum flexural tensile strain / με Unaged asphalt 3602 Long-term aged asphalt 1046 Example 1 2011 Example 2 2053 Example 3 2104 Example 4 2214 Example 5 2276 Example 6 1941 Example 7 1889 Example 8 1987 Example 9 1854 Example 10 1803 Comparative Example 1 1573 Comparative Example 2 1711

[0079] According to the data of the three indicators of asphalt, ductility, adhesion, oil spot ratio and maximum bending tensile strain, when the amount of tackifying component is between 0.8-2 parts, the viscosity and adhesion of the rejuvenated asphalt are poor, resulting in a high oil spot area ratio; when the amount of tackifying component is between 3-3.5 parts, the viscosity of the rejuvenated asphalt reaches a peak, and the oil spot ratio is the smallest, but the adhesion shows a downward trend, which is due to the excessive amount of tackifying component that makes the rejuvenated asphalt elastic, which is not conducive to the adhesion between the asphalt and the aggregate; according to the recovery of the three indicators of the long-term aged asphalt, the influence of the adhesion of the asphalt and the inhibition effect on the oil bleeding area of the rejuvenated asphalt in Examples 1-10, it is known that the amount of tackifying component should not be too high or too low, and the preferred ratio is: 10 parts of tall oil, 2-3 parts of tackifying component and 0.1 part of storage stabilizer.

[0080] The data of Comparative Example 1 shows that the adhesion-enhanced asphalt rejuvenator can effectively improve the oil bleeding phenomenon of the existing rejuvenator, and the rejuvenation effect is similar to that of the existing rejuvenator.

[0081] The data of Comparative Example 2 shows that using 70# base asphalt instead of the rejuvenator for rejuvenation, the three indicators, viscosity, adhesion and oil spot ratio are similar to those of Examples 1-5, but the maximum bending tensile strain in the low-temperature beam test is 14.9%-25.5% lower than that of Examples 1-5, which shows that the adhesion-enhanced asphalt rejuvenator can effectively improve the low-temperature performance of the rejuvenated mixture.

[0082] Overall, the adhesion-enhanced asphalt rejuvenator disclosed in the present application is prepared by using tall oil, tackifying component and storage stabilizer, and the formula is simple, which can improve the viscosity of the asphalt and increase the adhesion performance during the asphalt rejuvenation process, and can also restore the road performance of the asphalt, providing a solution to reduce the oil bleeding phenomenon during the construction of the rejuvenated pavement.

[0083] The above description is merely that of a specific implementation of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present disclosure, and all such changes and replacements should be encompassed within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be subject to the scope of protection of the claims.

Claims

1. An adhesion-enhancing asphalt rejuvenator, characterized by: The raw materials are calculated by mass as follows: 10 parts of base oil, 2-3 parts of viscosity-increasing component, and 0.1 part of storage stabilizer; the base oil is tall oil with an aromatic content of more than 60%; The viscosity-increasing component is SIS polymer; the storage stabilizer is light stabilizer and antioxidant.

2. The adhesion-enhancing asphalt rejuvenating agent according to claim 1, characterized in that: The storage stabilizer is a mixture of BASF light stabilizer 770 and BASF antioxidant 1010 of equal weight.

3. The adhesion-enhanced asphalt rejuvenating agent according to claim 1, characterized in that: The SIS polymer is a linear styrene-isoprene-styrene triblock copolymer.

4. The adhesion-enhanced asphalt rejuvenating agent according to claim 3, characterized in that: The mass content of styrene in SIS polymer is 15%~20%, and the mass content of isoprene is 80%~85%.

5. The adhesion-enhancing asphalt rejuvenating agent according to claim 3, characterized in that: The number average molecular weight of the SIS polymer is 80,000 to 120,000 g / mol.

6. The method for preparing the adhesion-enhanced asphalt regeneration agent according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: preheating 10 parts of base oil in an oven at 130-150°C for 30 minutes, adding 2-3 parts of a viscosity-increasing component, using a high-speed shearing machine to shear at 150-160°C at 3000-4000 rpm for 30 minutes, adding 0.1 parts of a storage stabilizer, shearing under the same conditions for 5 minutes, and cooling to room temperature to obtain an adhesion-enhanced asphalt regeneration agent.

7. Use of the adhesion-enhanced asphalt rejuvenating agent according to any one of claims 1 to 5, characterized in that: For the regeneration of aged asphalt, the adhesion-enhanced asphalt regeneration agent is added in an amount of 5% of the asphalt mass.

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