High-low temperature wide-range asphalt and preparation method thereof

Abstract

The wide-range asphalt is prepared from the following components in parts by weight: 88 to 92 parts of asphalt, 3 to 4 parts of aromatic hydrocarbon oil, 1 to 1.5 parts of paraffin oil, 2 to 2.5 parts of gutta-percha powder, 2.5 to 3.0 parts of resin, 0.3 to 0.5 part of EVA (Ethylene-Vinyl Acetate) and 0.3 to 0.5 part of an antioxidant stabilizer. The preparation method comprises the following steps: firstly, weighing according to the proportion, heating the base asphalt to 160 DEG C, adding the vulcanized grafted gutta-percha powder, and carrying out medium-speed short-time shear swelling; then heating to 185 DEG C, adding the resin, EVA and the antioxidant, and carrying out high-speed shearing for about 1 hour; and finally, cooling to 160 DEG C, adding aromatic oil and paraffin oil, stirring for 2-3 hours at a low speed of 800 revolutions per minute, developing and storing to obtain the wide-range asphalt mixture. On the basis of the I-C type SBS asphalt, by adding the resin, the oil and the rubber, the high and low temperature performance of the asphalt is greatly improved, and the wide-range asphalt mixture is simple in preparation process, economical, environment-friendly and suitable for industrial production. The method is very suitable for road engineering environment working conditions with large temperature difference in winter and summer and requirements on high-temperature and low-temperature performance of asphalt.

Description

Technical Field

[0001] This invention relates to the fields of chemical materials and asphalt modification technology, specifically to a high and low temperature wide-range asphalt and its preparation method. Background Technology

[0002] Roads in Heilongjiang, Jilin, Liaoning, Qinghai, Tibet, Xinjiang, Gansu, Ningxia, and Inner Mongolia suffer from frequent low-temperature cracking due to the cold weather, while high-temperature rutting is less common. Therefore, these regions place greater emphasis on the low-temperature performance of asphalt, generally using SBR asphalt with a ductility greater than 40cm at 5℃ and a softening point of 50-55℃. However, in recent years, some areas have experienced summer road surface temperatures exceeding 60℃, particularly in high-altitude regions with intense sunlight. Coupled with increasing traffic volume due to economic development, many road surfaces have developed severe rutting problems.

[0003] To address rutting problems, some road projects in these areas have experimented with using IC-type SBS asphalt with a softening point greater than 55℃, and even ID-type SBS asphalt with a softening point greater than 60℃. In application, it was found that ID-type SBS asphalt did reduce rutting, but low-temperature cracking became more severe, since the 5℃ ductility requirement for ID-type SBS asphalt is only greater than 20cm. IC-type SBS asphalt is in an even more problematic position, falling short of both ID-type and SBR asphalt requirements. Because its softening point is lower than ID-type SBS asphalt, and its 5℃ ductility is lower than SBR asphalt, it neither solved the rutting problem nor prevented increased cracking.

[0004] Therefore, there is a need to invent and apply a wide-range asphalt mixture suitable for cold winters and requiring certain high-temperature performance in summer. This asphalt should possess certain high-temperature resistance while also being able to resist pavement cracking at lower temperatures. Specifically, the technical requirements are that its ductility at 5℃ should meet the requirements of type II-C SBR asphalt, while its softening point should meet the requirements of type ID SBS asphalt. This would allow asphalt pavements to balance high and low temperature performance and adapt to a wider range of temperature differences.

[0005] Therefore, we propose a high- and low-temperature wide-range asphalt and its preparation method. Summary of the Invention

[0006] To overcome the shortcomings of the existing technology, the present invention provides the following technical solution: a high and low temperature wide-range asphalt, comprising the following components in parts by weight: 88-92 parts asphalt, 3-4 parts aromatic oil, 1-1.5 parts paraffin oil, 2-2.5 parts eucommia gum powder, 2.5-3.0 parts resin, 0.3-0.5 parts EVA, and 0.3-0.5 parts antioxidant stabilizer.

[0007] Preferably, the asphalt is IC type SBS modified asphalt with a penetration of 6-9 mm, a softening point of ≥55℃, and a ductility of ≥30 cm at 5℃.

[0008] Preferably, the aromatic oil has a polycyclic aromatic hydrocarbon content of 1.5-1.8% and a kinematic viscosity at 40°C greater than 100 mm. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 / s, the viscosity requirement is to ensure that the aromatic oil can be stirred and poured without heating. The aromatic content is to supplement the light components of asphalt and improve the compatibility and penetration of asphalt. Therefore, too low or too high is not appropriate.

[0009] Preferably, the paraffin oil has a flash point of 170-180℃ and a kinematic viscosity greater than 15 mm at 40℃. 2 With a kinematic viscosity greater than that of aromatic oils, paraffin oil can better increase the workability of asphalt and achieve a warm-mix effect. Since paraffin oil has a lower flash point, and most asphalt modification processes are above 180℃, a cooling step is required during its preparation.

[0010] Preferably, the Eucommia ulmoides rubber powder is a vulcanized and grafted Eucommia ulmoides rubber powder that has been vulcanized with sulfur and then grafted with maleic anhydride small molecules, wherein the weight ratio of sulfur:maleic anhydride:Eucommia ulmoides rubber is 4:1:95. Eucommia ulmoides rubber is a trans-polyisoprene, which has poor low-temperature performance, but through vulcanization and grafting, its low-temperature performance can be greatly improved while maintaining a certain high-temperature performance. This rubber with a high and low temperature balance is more suitable for the present invention than SBR and natural rubber.

[0011] Preferably, the resin is a petroleum resin with a melt viscosity of 265-290 cps at 200°C and a softening point greater than 100°C.

[0012] Preferably, the VA content of the EVA is between 25-30%, and the antioxidant stabilizer is 2,2'-methylenebis(4-methyl-6-tert-butylphenol). The requirements for the resin softening point and viscosity, as well as the VA content in the EVA, are all guarantees for improving the high-temperature performance of asphalt.

[0013] A method for preparing high and low temperature wide-range asphalt includes the following steps:

[0014] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0015] Step (2) Heat the asphalt weighed in step (1) and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio during shearing.

[0016] Step (3) Heating up and adding resin, EVA and antioxidant stabilizer for shearing;

[0017] Step (4) Cool down and add aromatic oil and paraffin oil, stir and develop, then keep warm to obtain wide-area asphalt mixture.

[0018] Preferably, in step (2), the Eucommia ulmoides gum powder is pre-sheared and swollen with asphalt for 25-30 minutes at a temperature of 160°C and a rotation speed of 2500-3000 r / min. In step (3), the solid particles such as resin, EVA, and antioxidant stabilizer, as well as the pre-sheared and swollen Eucommia ulmoides gum powder from step (2), are sheared with asphalt for 40-60 minutes at a temperature of 185°C and a rotation speed of 4000-4500 r / min.

[0019] Preferably, since the flash point of paraffin oil is 170-180℃, the asphalt must be cooled to below 170℃. The stirring temperature of the high-speed shear machine in step (4) is 160℃, and the stirring is carried out at a speed of 800-1000r / min for 50-60 minutes, and then kept warm for 1-2 hours.

[0020] In this invention, different steps correspond to different preparation temperatures, times, and rotation speeds, designed according to the characteristics of different materials. In step (2), the Eucommia ulmoides powder, similar to natural rubber powder, is tough and difficult to shear. The rotation speed is medium for pre-shear swelling, and the temperature and time do not need to be too high. Step (3) is high-temperature high-speed shearing, which involves high-temperature high-speed shearing of the swollen Eucommia ulmoides powder and solid particles. This is the main process for preparing modified asphalt, and the shearing time needs to be longer. In step (4), the main consideration is that the flash point of paraffin oil is low, so it cannot be added in step (3) and cooling is required. Since both materials are oils, their mixing and stirring are synchronized with the development during preparation.

[0021] Beneficial effects

[0022] Compared with the prior art, the present invention provides a high and low temperature wide-range asphalt and its preparation method, which has the following beneficial effects:

[0023] 1. This invention relates to a high- and low-temperature wide-range asphalt and its preparation method. In selecting the base asphalt, it does not choose ID-type SBS asphalt, which has better high-temperature performance, because improving the low-temperature performance of asphalt is more difficult than improving its high-temperature performance; nor does it choose SBR asphalt, which has superior low-temperature performance, because its high-temperature performance is significantly insufficient. Improving high-temperature performance would require adding more resin, which would damage low-temperature performance and increase costs. Therefore, this invention selects IC-type SBS asphalt, which has better high-temperature performance than SBR asphalt and better low-temperature performance than ID-type SBS asphalt.

[0024] 2. This high and low temperature wide-range asphalt and its preparation method, through index setting, selected petroleum resin and EVA with better high-temperature performance; in terms of rubber selection, SBR was not considered, firstly because SBR and SBS have a compatibility issue, and secondly because after vulcanization and grafting, Eucommia ulmoides rubber has low-temperature performance close to that of SBR and natural rubber, and it still retains good high-temperature performance, which is irreplaceable by SBR and natural rubber.

[0025] 3. Regarding the optimization of oil components in this high- and low-temperature wide-range asphalt and its preparation method, since the addition of resin increases the viscosity of the asphalt, paraffin oil with a higher proportion of lightweight components is needed to reduce the construction viscosity and increase the workability of the asphalt mixture. The use of paraffin oil is mainly due to its lower viscosity, which allows for a warm-mix effect and facilitates the compaction of the asphalt mixture. Aromatic oil, with its higher content of polycyclic aromatic hydrocarbons, can improve the low-temperature flexibility of the asphalt while offsetting the reduction in penetration caused by the resin. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] A high and low temperature wide-range asphalt comprises the following components in parts by weight: 90 parts of IC-type SBS modified asphalt with a penetration of 7 mm, a softening point of 56 °C, and a ductility of 39 cm at 5 °C; a polycyclic aromatic hydrocarbon content of 1.5%; and a kinematic viscosity greater than 100 mmHg at 40 °C. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 Three parts of aromatic oil per s, flash point 170℃, kinematic viscosity 16.5 mm at 40℃. 2 1 part paraffin oil per s, 2 parts vulcanized grafted eucommia gum powder with a sulfur:maleic anhydride:eucommia gum weight ratio of 4:1:95, 3 parts petroleum resin with a melt viscosity of 278 cps at 200℃ and a softening point greater than 100℃, 0.5 parts EVA with a VA content of 28%, and 0.5 parts antioxidant stabilizer.

[0029] The above-mentioned method for preparing wide-area asphalt mixtures includes the following steps:

[0030] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0031] Step (2) Heat the asphalt weighed in step (1) to 160°C and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio. Shear for 25 minutes at a speed of 2800 r / min.

[0032] Step (3) Heat to 185°C, add resin, EVA and antioxidant stabilizer, and shear at 4200 r / min for 50 min;

[0033] Step (4) Cool down to 160℃, add aromatic oil and paraffin oil, stir at 900r / min speed for 50min, and then keep warm for 1.5h to obtain wide-area asphalt mixture.

[0034] Example 2

[0035] A high and low temperature wide-range asphalt comprises the following components in parts by weight: 90 parts of IC-type SBS modified asphalt with a penetration of 7 mm, a softening point of 56 °C, and a ductility of 39 cm at 5 °C; a polycyclic aromatic hydrocarbon content of 1.5%; and a kinematic viscosity greater than 100 mmHg at 40 °C. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 Three parts of aromatic oil per s, flash point 170℃, kinematic viscosity 16.5 mm at 40℃. 2 1 part paraffin oil per s, 2 parts vulcanized grafted eucommia gum powder with a sulfur:maleic anhydride:eucommia gum weight ratio of 4:1:95, 3 parts petroleum resin with a melt viscosity of 278 cps at 200℃ and a softening point greater than 100℃, 0.5 parts EVA with a VA content of 28%, and 0.5 parts antioxidant stabilizer.

[0036] This embodiment has the same formulation as Example 1, and the preparation method is as follows:

[0037] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0038] Step (2) Heat the asphalt weighed in step (1) to 160°C and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio. Shear for 30 minutes at a speed of 3000 r / min.

[0039] Step (3) Heat to 185°C, add resin, EVA and antioxidant stabilizer, and shear at 4500 r / min for 40 min;

[0040] Step (4) Cool down to 160℃, add aromatic oil and paraffin oil, stir at 800r / min for 60min, and then keep warm for 1h to obtain wide-area asphalt mixture.

[0041] Example 3

[0042] A high and low temperature wide-range asphalt comprises the following components in parts by weight: 90 parts of IC-type SBS modified asphalt with a penetration of 8 mm, a softening point of 56℃, and a ductility of 32 cm at 5℃; a polycyclic aromatic hydrocarbon content of 1.5%; and a kinematic viscosity greater than 100 mmHg at 40℃. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 Three parts of aromatic oil per s, flash point 170℃, kinematic viscosity 16.5 mm at 40℃. 2 1 part paraffin oil per s, 2 parts vulcanized grafted eucommia gum powder with a sulfur:maleic anhydride:eucommia gum weight ratio of 4:1:95, 3 parts petroleum resin with a melt viscosity of 278 cps at 200℃ and a softening point greater than 100℃, 0.5 parts EVA with a VA content of 28%, and 0.5 parts antioxidant stabilizer.

[0043] In this embodiment, IC type SBS asphalt with a penetration of 8 mm, a softening point of 56℃, and a ductility of 32 cm at 5℃ was selected. The preparation method was the same as in Example 1, and the preparation method was carried out according to the following steps:

[0044] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0045] Step (2) Heat the asphalt weighed in step (1) to 160°C and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio. Shear for 25 minutes at a speed of 2800 r / min.

[0046] Step (3) Heat to 185°C, add resin, EVA and antioxidant stabilizer, and shear at 4200 r / min for 50 min;

[0047] Step (4) Cool down to 160℃, add aromatic oil and paraffin oil, stir at 900r / min speed for 50min, and then keep warm for 1.5h to obtain wide-area asphalt mixture.

[0048] Example 4

[0049] A high and low temperature wide-range asphalt comprises the following components in parts by weight: 90 parts of IC-type SBS modified asphalt with a penetration of 7 mm, a softening point of 56℃, and a ductility of 39 cm at 5℃; a polycyclic aromatic hydrocarbon content of 1.8%; and a kinematic viscosity greater than 100 mmHg at 40℃. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 2.5 parts of aromatic oil per s, flash point 170℃, kinematic viscosity greater than 15 mm at 40℃. 21.5 parts of paraffin oil per s, 2.5 parts of vulcanized grafted eucommia gum powder with a sulfur:maleic anhydride:eucommia gum weight ratio of 4:1:95, 2.5 parts of petroleum resin with a melt viscosity of 265-290 cps at 200℃ and a softening point greater than 100℃, 0.5 parts of EVA with a VA content of 28%, and 0.5 parts of 2,2'-methylenebis-(4-methyl-6-tert-butylphenol).

[0050] This embodiment uses the same asta and preparation method as in Embodiment 1, and the preparation method follows the steps below:

[0051] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0052] Step (2) Heat the asphalt weighed in step (1) to 160°C and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio. Shear for 25 minutes at a speed of 2800 r / min.

[0053] Step (3) Heat to 185°C, add resin, EVA and antioxidant stabilizer, and shear at 4200 r / min for 50 min;

[0054] Step (4) Cool down to 160℃, add aromatic oil and paraffin oil, stir at 900r / min speed for 50min, and then keep warm for 1.5h to obtain wide-area asphalt mixture.

[0055] Comparative Example 1

[0056] This comparative example uses ID-type SBS asphalt with a penetration of 5 mm, a softening point of 68 °C, and a ductility of 22 cm. The formulations and preparation methods of other components are the same as in Example 1.

[0057] Comparative Example 2

[0058] In this comparative example, ordinary Eucommia ulmoides gum powder was used instead of vulcanized grafted Eucommia ulmoides gum powder. The formulations and preparation methods of other components were the same as in Example 1.

[0059] Comparative Example 3

[0060] In this comparative example, rubber oil was used to replace aromatic oil and paraffin oil, and the formulations and preparation methods of other components were the same as in Example 1.

[0061] Comparative Example 4

[0062] The formulation of this comparative example material is the same as that in Example 1, and it is prepared according to the following steps:

[0063] Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside.

[0064] Step (2) Heat the asphalt weighed in step (1) to 160°C and pour it into a high-speed shearing machine. Add solid materials, heat to 185°C, and shear at 4500 r / min for 50 min.

[0065] Step (3) Cool down to 160℃, add aromatic oil and paraffin oil, stir at 800r / min for 60min, and then keep warm for 1h.

[0066] Test example

[0067] The performance of the wide-area asphalt mixtures prepared in Examples 1-4 and Comparative Examples 1-4 was tested, and two types of asphalt commonly used in cold regions were used as references. The test methods were in accordance with the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011). The test results are shown in Table 1.

[0068] Table 1. Test results of wide-area asphalt mixture performance

[0069] serial number Needle penetration (0.1mm) Ductility, 5℃ (cm) Softening point (℃) Rotational viscosity at 135℃ (Pa•s) Example 1 63.4 49.8 66.3 1.82 Example 2 65.6 47.4 65.8 1.77 Example 3 66.2 48.3 68.4 1.91 Example 4 64.2 48.3 70.1 1.86 Comparative Example 1 50.3 29.2 81.9 2.43 Comparative Example 2 57.2 24.3 75.7 1.79 Comparative Example 3 56.7 33.4 66.8 3.52 Comparative Example 4 55.7 24.9 67.4 2.14 SBS Asphalt IC 67.9 34.1 58.2 2.15 SBR Asphalt II-C 72.4 47.6 52.6 1.85

[0070] Based on the above test results, it can be seen that the modified asphalt prepared according to the wide-range asphalt mixture formula and preparation method disclosed in this invention meets the specifications for its three major asphalt indicators and construction viscosity, and all exhibit excellent performance. The softening point and ductility show that the high-temperature performance is improved to a certain extent, exceeding that of type ID SBS asphalt, and the low-temperature performance is further improved, reaching the technical standards of type II-C SBR asphalt. The construction viscosity meets the specifications. This wide-range asphalt, possessing certain high-temperature performance and excellent low-temperature performance, is very suitable for road construction in western and northern regions where there are large temperature differences between winter and summer, requiring high and low temperature performance.

[0071] Comparative Example 1 used ID-type SBS asphalt as the base asphalt, which did improve the high-temperature performance significantly, but the low-temperature performance did not meet the requirements for use in areas with large temperature differences between winter and summer.

[0072] Comparative Example 2 used ordinary Eucommia ulmoides gum powder. The test results showed an increase in softening point, but a rapid decline in low-temperature performance. This unvulcanized grafted Eucommia ulmoides gum exhibits plastic characteristics due to the unopened double bonds, making it relatively brittle. While it offers slight improvement in high-temperature performance, it degrades low-temperature performance. Furthermore, the resin itself already contributes to low-temperature performance degradation, and the lack of vulcanized grafted Eucommia ulmoides gum or SBR-like rubber further exacerbates the problem. Crucially, the unopened double bonds and grafted small functional groups in the Eucommia ulmoides gum prevent it from achieving good compatibility with asphalt, resulting in minimal improvement in asphalt performance.

[0073] Comparative Example 3 used rubber oil instead of aromatic oil and paraffin oil. The test results showed that the ductility was inferior to the example, and the construction viscosity increased significantly. This is because rubber oil is mainly used in the processing of modified asphalt and rubber asphalt to promote compatibility between the modifier and asphalt. It has limited improvement on high and low temperature performance and has some effect on reducing the viscosity of modified asphalt, but not a significant one. Aromatic oil has a higher polycyclic aromatic hydrocarbon (PAH) content than rubber oil. PAHs can better improve the low-temperature flexibility and penetration of vulcanized grafted Eucommia ulmoides rubber. Therefore, adding aromatic oil better ensures the low-temperature performance of wide-range asphalt. Since paraffin oil has a much better viscosity-reducing effect than rubber oil, it can significantly offset the side effect of increased asphalt viscosity caused by EVA resin, allowing the wide-range asphalt to still maintain a relatively low construction viscosity.

[0074] Comparative Example 4 differs from the Example in that it omits the pre-shear swelling step of vulcanized grafted Eucommia ulmoides rubber powder. The experimental results show a significant difference in low-temperature performance compared to the Example, failing to leverage the high flexibility of vulcanized grafted Eucommia ulmoides rubber to improve the low-temperature performance of asphalt. This indicates that rubber modifiers like vulcanized grafted Eucommia ulmoides rubber, similar to tire rubber powder, require pre-swelling. However, considering the characteristics of vulcanized grafted Eucommia ulmoides rubber, better shearing is achieved after swelling. Therefore, instead of a longer high-temperature swelling time, a slow-shear swelling method was used to accelerate the swelling process.

[0075] The example was compared with two types of asphalt commonly used in highway engineering in cold regions. The test results show that the low-temperature performance exceeded that of IC type SBS asphalt and was comparable to that of II-C type SBR asphalt; while the high-temperature performance exceeded that of II-C type SBR asphalt and IC type SBS asphalt, and even reached or exceeded that of ID type SBS asphalt.

[0076] Therefore, based on the comprehensive test results, every step is crucial, whether it is the wide-area asphalt mixture formula or the modified asphalt preparation process disclosed in this invention.

[0077] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wide-range asphalt suitable for both high and low temperatures, characterized in that: It includes the following components in parts by weight: 88-92 parts asphalt, 3-4 parts aromatic oil, 1-1.5 parts paraffin oil, 2-2.5 parts eucommia gum powder, 2.5-3.0 parts resin, 0.3-0.5 parts EVA, and 0.3-0.5 parts antioxidant stabilizer.

2. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The asphalt is IC type SBS modified asphalt with a penetration of 6-9 mm, a softening point of ≥55℃, and a ductility of ≥30 cm at 5℃.

3. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The aromatic oil has a polycyclic aromatic hydrocarbon content of 1.5-1.8% and a kinematic viscosity greater than 100 mm at 40°C. 2 kinematic viscosity at 100℃ greater than 8 mm / s / s 2 / s.

4. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The paraffin oil has a flash point of 170-180℃ and a kinematic viscosity greater than 15 mm at 40℃. 2 / s.

5. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The Eucommia ulmoides gum powder is a vulcanized and grafted Eucommia ulmoides gum powder that has been vulcanized with sulfur and then grafted with small molecules of maleic anhydride, wherein the weight ratio of sulfur:maleic anhydride:Eucommia ulmoides gum is 4:1:

95.

6. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The resin is a petroleum resin with a melt viscosity of 265-290 cps at 200℃ and a softening point greater than 100℃.

7. The high and low temperature wide-range asphalt according to claim 1, characterized in that: The VA content of the EVA is between 25-30%, and the antioxidant stabilizer is 2,2'-methylenebis(4-methyl-6-tert-butylphenol).

8. A method for preparing a wide-area asphalt mixture according to claims 1-7, characterized in that: The following steps are involved: Step (1) Weigh out the asphalt, aromatic oil, paraffin oil, eucommia gum powder, resin, EVA and antioxidant stabilizer according to the weight parts and set aside. Step (2) Heat the asphalt weighed in step (1) and pour it into a high-speed shearing machine. Add half of the Eucommia ulmoides rubber powder every 5 minutes according to the mass ratio during shearing. Step (3) Heating up and adding resin, EVA and antioxidant stabilizer for shearing; Step (4) Cool down and add aromatic oil and paraffin oil, stir and develop, then keep warm to obtain wide-area asphalt mixture.

9. The method for preparing high and low temperature wide-range asphalt according to claim 8, characterized in that: In step (2), the Eucommia ulmoides gum powder is pre-sheared and swollen with asphalt for 25-30 minutes at a temperature of 160℃ and a rotation speed of 2500-3000 r / min. In step (3), the resin, EVA, antioxidant stabilizer and other solid particles and the pre-sheared and swollen Eucommia ulmoides gum powder in step (2) are sheared with asphalt for 40-60 minutes at a temperature of 185℃ and a rotation speed of 4000-4500 r / min.

10. The method for preparing high and low temperature wide-range asphalt according to claim 8, characterized in that: In step (4), the high-speed shear machine is stirred at 160°C for 50-60 minutes at a speed of 800-1000 r / min, and then kept warm for 1-2 hours.