Vitamin connecting agent-based cold-mixed rubber asphalt mixture and preparation method thereof
By introducing vitamin linking agent and reactive diluent in the preparation of rubber asphalt, the problem of poor compatibility between rubber powder and asphalt in traditional processes is solved, and a cold-mixed rubber asphalt mixture that can be mixed at room temperature is achieved, which improves construction efficiency and low-temperature performance.
Patent Information
- Application Number
- CN202510000748.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-04-11
AI Technical Summary
In the traditional rubber asphalt preparation process, the compatibility between rubber powder and asphalt is poor, and stored and transported under high temperature conditions, resulting in high energy consumption, low construction efficiency and increased cost.
The preparation method of cold-mixed rubber asphalt mixture based on vitamin linking agent is adopted. By combining the vitamin linking agent, 60-mesh waste rubber powder with matrix asphalt, combined with the mixing of the reactive diluent and the ore, a mixture that can be mixed at room temperature is formed.
It significantly improves the compatibility between rubber powder and asphalt, ensures the uniformity and stability of the mixture, reduces viscosity, improves construction efficiency and low-temperature performance, and is suitable for fast low-temperature construction.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of road engineering materials, and in particular to a cold-mix rubber asphalt mixture based on a Vitalinker and a preparation method thereof. Background Art
[0002] With the rapid development of road construction, the amount of rubber waste generated by scrap tires has increased dramatically. How to reuse these wastes in an environmentally friendly and efficient way has become a core problem that needs to be solved urgently in the current scientific research field.
[0003] Rubber asphalt has been widely used in many fields due to its excellent waste rubber processing capabilities. However, the traditional rubber powder rubber asphalt preparation process needs to be carried out under high temperature conditions, which leads to high energy consumption, and the rubber powder rubber asphalt produced is solid or semi-solid at room temperature, and needs to be heated again to liquid before use, which seriously affects the construction efficiency. In addition, the product needs to be stored and transported under high temperature conditions, which undoubtedly increases the cost and operation complexity. Therefore, the traditional rubber asphalt preparation process faces many challenges such as poor compatibility between rubber powder and asphalt and insufficient high temperature storage stability.
[0004] In summary, it is of great significance to develop a new technology that can overcome the problems of poor compatibility between rubber powder and asphalt and poor storage stability in the traditional rubber asphalt preparation process, and at the same time provide a cold-mix rubber asphalt mixture that can be mixed at room temperature and is suitable for low-temperature rapid construction. Summary of the invention
[0005] The object of the present invention is to provide a cold mix rubber asphalt mixture based on Vitalinker and a preparation method thereof, so as to solve the problems raised in the above background technology.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:
[0007] A method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker comprises the following steps:
[0008] Step 1: Compound and modify the Vitalinker, 60-mesh waste rubber powder and base asphalt to obtain rubber asphalt;
[0009] Step 2: Evenly mix the rubber asphalt, reactive diluent and mineral material to obtain a cold mix rubber asphalt mixture.
[0010] In a further embodiment, the Vitalinker is a German TOR linker.
[0011] In a further embodiment, the base asphalt is 70# road petroleum asphalt.
[0012] In a further embodiment, the reactive diluent is a cold mix agent.
[0013] In a further embodiment, the preparation process of the reactive diluent is:
[0014] SBS and oil slurry are uniformly mixed in a mass ratio of 40-50:30-40 to obtain a mixture A; benzoyl peroxide, methyl methacrylate and 6-chloro-1-hexene are added to the mixture A, melt-mixed at 70-140° C. for 30-60 minutes, and extruded to obtain a reactive diluent.
[0015] In a further embodiment, the raw materials of the reactive diluent include the following components: 0.1 to 0.5 parts of benzoyl peroxide, 3 to 5 parts of methyl methacrylate, 4 to 6 parts of 6-chloro-1-hexene, and 30 to 40 parts of mixture A, by mass.
[0016] Wherein, the molecular weight of the SBS is 60000-150000 g / mol.
[0017] Among them, the reactive diluent used in asphalt is a special chemical substance. Methyl methacrylate is grafted with SBS and then 6-chloro-1-hexene is introduced. It can increase its own bonding performance while increasing its compatibility with the Vitalinker, further improving the flexibility and crack resistance of the cold-mixed rubber asphalt mixture under low temperature conditions. In addition, the introduction of the reactive diluent can also be well compatible with the matrix asphalt, reduce the viscosity of the asphalt, and ensure that the asphalt is in a flowing state at room temperature, thereby ensuring the workability of the asphalt. At the same time, this reactive diluent can also quickly release the viscosity of the asphalt and increase the early strength of the asphalt mixture.
[0018] Among them, Vitalinker is a white particle with a polymer with a double bond structure. It can promote the synthesis of new molecules through chemical changes between rubber powder particles and asphalt. Vitalinker can cross-link with the sulfur of asphaltene and petroleum contained in asphalt, and can also cross-link with the sulfur of the rubber powder surface layer to form a large network structure of rings and chain polymers. This structure helps to improve the high and low temperature performance of rubber asphalt, reduce viscosity, and improve construction and workability. As an additive for wet rubber asphalt, Vitalinker can also improve construction and workability, reduce construction temperature, and enhance the compatibility of rubber and asphalt.
[0019] More optimally, the 60-mesh waste rubber powder accounts for 18-22 wt% of the mass of the base asphalt.
[0020] More optimally, the Vitalinker accounts for 4-5wt% of the mass of 60-mesh waste rubber powder.
[0021] More optimally, the reactive diluent accounts for 13-20 wt% of the rubber asphalt mass.
[0022] More optimally, the mass ratio of the rubber asphalt to the mineral material is 5.5-6:100.
[0023] More optimally, in step 1, the preparation of rubber asphalt is specifically the following process: heating the base asphalt to 160-180°C, stirring with a high-speed disperser at 2400-2600r / min, adding measured 60-mesh waste rubber powder in batches during stirring, and finally adding a measured Vitalinker, heating to 170-190°C, stirring for 50-70 minutes, and incubating in an oven at 170-190°C for 1-3h to obtain rubber asphalt.
[0024] More optimally, the specific steps of step 2 are: (1) adding a reactive diluent to the rubber asphalt, stirring it evenly at 100-120°C, cooling it to 75-85°C for standby use, and obtaining raw material A; (2) adding the aggregate to a mixing pot, heating it to 75-85°C, adding raw material A, and mixing evenly to obtain a cold-mixed rubber asphalt mixture.
[0025] More optimally, the mineral material includes aggregate and cement in a mass ratio of 93.5 to 94.5:6.
[0026] More optimally, the aggregate is graded according to AC-16; the raw materials of the aggregate include the following components: by mass, 33 to 35 parts of 10 to 15 mm aggregate, 28 to 32 parts of 5 to 10 mm aggregate, 8 to 12 parts of 3 to 5 mm aggregate, and 18 to 22 parts of 0 to 3 mm aggregate.
[0027] In order to solve the above technical problems, the present invention provides the following technical solutions:
[0028] Compared with the prior art, the present invention has the following beneficial effects:
[0029] 1. The scheme significantly improves the compatibility of rubber powder and asphalt by introducing Vitalinker. At the same time, combined with specific temperature conditions and mixing process, the uniformity and stability of the mixture are ensured. In addition, by controlling the specific dosage range of Vitalinker, the good compatibility of rubber powder and asphalt can be better ensured.
[0030] 2. By controlling the amount and timing of adding reactive diluents, the compatibility and construction performance of cold-mix rubber asphalt mixture can be more effectively increased.
[0031] 3. In the scheme, by using specific grading compounding, the aggregate structure of the cold-mix rubber asphalt mixture can be effectively optimized and the mechanical properties can be improved, thereby improving the performance of the cold-mix rubber asphalt mixture in specific application scenarios. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0033] It should be noted that the following parts are by mass, and all raw materials involved in the present invention are purchased from manufacturers without any special restrictions, and exemplarily include: in the following embodiments, the Vita linker is a German TOR linker; the base asphalt is 70# road petroleum asphalt; 60 mesh waste rubber powder is purchased from Mianyang Ruiyang New Materials; the item number of SBS is 95, purchased from Foshan Ruisheng Plastic Co., Ltd.
[0034] In the following embodiments, it is particularly noted that the relevant material parameters are as follows:
[0035] (1) Mineral materials include aggregate and cement in a mass ratio of 94:6.
[0036] (2) The raw materials of the aggregate include the following components: by mass: 34 parts of 10-15 mm aggregate, 30 parts of 5-10 mm aggregate, 10 parts of 3-5 mm aggregate, and 20 parts of 0-3 mm aggregate.
[0037] Embodiment 1: A method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker, comprising the following steps:
[0038] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly in a mass ratio of 45:37 to obtain a mixture A; 0.3 parts of benzoyl peroxide, 4 parts of methyl methacrylate, and 5 parts of 6-chloro-1-hexene were added to 35 parts of the mixture A, melt-mixed at 100° C. for 45 minutes, and extruded to obtain a reactive diluent;
[0039] Step 2: Heat the base asphalt to 170°C, stir it with a high-speed disperser at 2500r / min, add the measured 60-mesh waste rubber powder in batches during the stirring process, and finally add the measured Vitalinker. The mass ratio of base asphalt, 60-mesh waste rubber powder and Vitalinker is 100:20:0.9. Heat to 180°C, stir for 60 minutes, and incubate in an oven at 180°C for 2 hours to obtain rubber asphalt;
[0040] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 20wt% of the total mass of the rubber asphalt, stir evenly at 110°C, cool to 80°C for use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold-mixed rubber asphalt mixture.
[0041] Embodiment 2: A method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker, comprising the following steps:
[0042] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly at a mass ratio of 40:30 to obtain a mixture A; 0.1 parts of benzoyl peroxide, 3 parts of methyl methacrylate, and 4 parts of 6-chloro-1-hexene were added to 30 parts of the mixture A, melt-mixed at 70° C. for 30 minutes, and extruded to obtain a reactive diluent;
[0043] Step 2: Heat the base asphalt to 160°C, stir it with a high-speed disperser at 2400r / min, add the measured 60-mesh waste rubber powder in batches during the stirring process, and finally add the measured Vitalinker. The mass ratio of base asphalt, 60-mesh waste rubber powder and Vitalinker is 100:20:0.9. Heat to 170°C, stir for 50 minutes, and incubate in a 170°C oven for 1 hour to obtain rubber asphalt;
[0044] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 20wt% of the total mass of the rubber asphalt, stir evenly at 100°C, cool to 75°C for use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold-mixed rubber asphalt mixture.
[0045] Embodiment 3: A method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker, comprising the following steps:
[0046] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly at a mass ratio of 50:40 to obtain a mixture A; 0.5 parts of benzoyl peroxide, 5 parts of methyl methacrylate, and 6 parts of 6-chloro-1-hexene were added to 40 parts of the mixture A, melt-mixed at 140° C. for 60 minutes, and extruded to obtain a reactive diluent;
[0047] Step 2: Heat the base asphalt to 180°C, stir it with a high-speed disperser at 2600r / min, add the measured 60-mesh waste rubber powder in batches during the stirring process, and finally add the measured Vitalinker. The mass ratio of the base asphalt, 60-mesh waste rubber powder and Vitalinker is 100:20:0.9. Heat to 190°C, stir for 70 minutes, and incubate in a 190°C oven for 3 hours to obtain rubber asphalt;
[0048] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 20wt% of the total mass of the rubber asphalt, stir evenly at 120°C, cool to 85°C for use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold-mixed rubber asphalt mixture.
[0049] Comparative Example 1: Based on Example 1, the purchased 70# road petroleum asphalt was used as the base asphalt instead of the rubber asphalt, and the other processes remained unchanged, specifically:
[0050] Add a reactive diluent to the base asphalt, the amount of the reactive diluent accounts for 20wt% of the total mass of the base asphalt, stir evenly at 110°C, cool to 80°C for use, and obtain raw material A; add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of base asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold mix rubber asphalt mixture.
[0051] Comparative Example 2: Based on Example 1, no Vitalinker was added, and the other processes remained unchanged, specifically:
[0052] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly in a mass ratio of 45:37 to obtain a mixture A; 0.3 parts of benzoyl peroxide, 4 parts of methyl methacrylate, and 5 parts of 6-chloro-1-hexene were added to 35 parts of the mixture A, melt-mixed at 100° C. for 45 minutes, and extruded to obtain a reactive diluent;
[0053] Step 2: Heat the base asphalt to 170°C, stir it at 2500r / min with a high-speed disperser, add the measured 60-mesh waste rubber powder in batches during the stirring process, and finally add the measured Vitalinker. The mass ratio of the base asphalt and the 60-mesh waste rubber powder is 100:20. Heat to 180°C, stir for 60 minutes, and incubate in an oven at 180°C for 2 hours to obtain rubber asphalt;
[0054] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 20wt% of the total mass of the rubber asphalt, stir evenly at 110°C, cool to 80°C for use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold-mixed rubber asphalt mixture.
[0055] Comparative Example 3: Based on Example 1, rubber asphalt was prepared according to other methods, and the other processes remained unchanged, specifically:
[0056] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly in a mass ratio of 45:37 to obtain a mixture A; 0.3 parts of benzoyl peroxide, 4 parts of methyl methacrylate, and 5 parts of 6-chloro-1-hexene were added to 35 parts of the mixture A, melt-mixed at 100° C. for 45 minutes, and extruded to obtain a reactive diluent;
[0057] Step 2: Mix the Vitalinker and 60-mesh waste rubber powder in a uniform proportion, wherein the amount of the Vitalinker accounts for 4.5wt% of the mass of the 60-mesh waste rubber powder; add the matrix asphalt, wherein the 60-mesh waste rubber powder accounts for 20wt% of the mass of the matrix asphalt; and mix them thoroughly at 140° C. to generate rubber asphalt;
[0058] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 15wt% of the total mass of the rubber asphalt, stir evenly at 110°C, cool to 80°C for standby use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold-mixed rubber asphalt mixture.
[0059] Comparative Example 4: Based on Example 1, the amount of the reactive diluent was adjusted, and the other processes remained unchanged, specifically:
[0060] Step 1: Preparation of reactive diluent: SBS and oil slurry were mixed uniformly in a mass ratio of 45:37 to obtain a mixture A; 0.3 parts of benzoyl peroxide, 4 parts of methyl methacrylate, and 5 parts of 6-chloro-1-hexene were added to 35 parts of the mixture A, melt-mixed at 100° C. for 45 minutes, and extruded to obtain a reactive diluent;
[0061] Step 2: Heat the base asphalt to 170°C, stir it with a high-speed disperser at 2500r / min, add the measured 60-mesh waste rubber powder in batches during the stirring process, and finally add the measured Vitalinker. The mass ratio of base asphalt, 60-mesh waste rubber powder and Vitalinker is 100:20:0.9. Heat to 180°C, stir for 60 minutes, and incubate in an oven at 180°C for 2 hours to obtain rubber asphalt;
[0062] Step 3: (1) Add a reactive diluent to the rubber asphalt, the amount of the reactive diluent accounts for 30wt% of the total mass of the rubber asphalt, stir evenly at 110°C, cool to 80°C for use, and obtain raw material A; (2) Add the aggregate to a mixing pot, heat to 80°C, add raw material A, the mass ratio of rubber asphalt to mineral material is 5.7:100, mix evenly, and obtain a cold mix rubber asphalt mixture.
[0063] Test: Experiment 1: The rubber asphalt in Example 1, Comparative Example 1 and Comparative Example 2 was tested for softening point, and the results are shown in Table 1;
[0064] project Softening point / ℃ Example 1 67.6 Comparative Example 1 46.0 Comparative Example 2 64.8
[0065] Table 1
[0066] Result analysis: According to the data analysis in Table 1, it can be seen that by comparing Example 1 with Comparative Example 1, it can be learned that, compared with ordinary base asphalt, the rubber asphalt in Example 1 can improve the viscosity and elasticity of the rubber asphalt through a specific preparation process and a specific amount of reactive diluent and Vita linker, and improve the flexibility of the rubber asphalt, thereby significantly improving the softening point; by comparing Example 1 with Comparative Example 2, it can be learned that the softening point of Example 1 with the addition of Vita linker is higher than that of Comparative Example 2 without the addition of Vita linker. This is because the Vita linker can improve the compatibility of rubber powder and asphalt, and at the same time, combined with specific temperature conditions and stirring process, ensure the uniformity and stability of the mixture, and further improve the softening point.
[0067] Experiment 2: The cold-mixed rubber asphalt mixtures prepared in Example 1 and Comparative Example 2 were subjected to mechanical property tests at a specific time and temperature. The Marshall specimens were compacted 75 times on both the front and back sides. The results are shown in Table 2:
[0068]
[0069] Table 2
[0070] Result analysis: According to the data analysis in Table 2, it can be seen that when Example 1 is compared with Comparative Example 2, the Marshall stability of Example 1 in a water bath at 30°C and 60°C for 30 minutes in one day is reduced, while the stability of Example 1 in a water bath at 30°C and 60°C for 30 minutes and 48 hours in three days is better. The overall water immersion residual degree of the stabilizer in Example 1 is higher than that in Comparative Example 2;
[0071] This is because the Vitalinker added in Example 1 has the property of improving the low-temperature performance of asphalt, which helps the cold-mix rubber asphalt mixture to maintain good flexibility and crack resistance under low-temperature conditions;
[0072] In the short term, under high temperature conditions, Vitalinker helps reduce the flow and deformation of asphalt at high temperatures, thereby improving the durability and bearing capacity of the road surface; in the long term, cold-mix rubber asphalt mixtures exposed to low temperature conditions for a long time will be damaged by shrinkage and embrittlement. The addition of Vitalinker helps slow down this process by improving the flexibility and anti-aging properties of asphalt, allowing the mixture to maintain good performance under long-term low temperature conditions; under high temperature and long-term exposure, asphalt will deteriorate due to oxidation and aging. Vitalinker has antioxidant and anti-aging properties, which helps slow down the aging rate of asphalt, thereby improving the long-term high temperature stability of the mixture;
[0073] In terms of residual stability after water immersion, the addition of Vitalinker helps to improve the mixture's resistance to water damage. It interacts with other components in asphalt to form a tighter structure, reducing the penetration and erosion of water into the mixture. In addition, Vitalinker also has the ability to improve the adhesion between asphalt and aggregate, thereby further improving the water stability of the mixture.
[0074] Experiment 3: The cold-mixed rubber asphalt mixtures prepared in Example 1 and Comparative Examples 1 to 4 were subjected to mechanical property tests at specific temperatures and bulk relative density tests. The mechanical property tests specifically involved the Marshall stability of the cold-mixed rubber asphalt mixtures prepared in Example 1 and Comparative Examples 1 to 4 in a water bath at 60° C. for 48 hours for three days. The Marshall specimens were compacted 75 times on both sides, and there was also a water immersion residual stability test. The results are shown in Table 3:
[0075]
[0076]
[0077] Table 3
[0078] Result analysis: According to the data analysis in Table 3, it can be seen that when Example 1 is compared with Comparative Examples 1 to 4, the mechanical properties and the mean value of the relative density of the bulk volume are from good to bad, which are Example 1, Comparative Example 3, Comparative Example 4, Comparative Example 2, and Comparative Example 1. In Comparative Example 3, the rubber asphalt was prepared by a different method, and the performance decreased, but an appropriate amount of Vitalinker and reactive diluent were still added, so the performance was slightly higher than that of Comparative Example 4; while in Comparative Example 4, the amount of reactive diluent added was increased, and the performance did not improve but deteriorated. This is because as the amount of reactive diluent increased, the penetration of asphalt gradually decreased, and the higher the temperature, the more obvious the reduction. Although the addition of reactive diluent can significantly improve the temperature sensitivity of asphalt, excessive dosage may cause asphalt to become too rigid at low temperatures, which is not conducive to the use of pavement. However, by introducing Vitalinker, Example 1 significantly improved the compatibility of waste rubber powder and matrix asphalt, and improved the storage stability and construction performance of the mixture. At the same time, combined with a specific preparation process and the optimization of the dosage of Vitalinker and reactive diluent, the flexibility and crack resistance of the cold-mix rubber asphalt mixture under low temperature conditions are further improved, making it more suitable for application scenarios such as road paving, repairing and low-temperature rapid construction, thereby improving the mechanical properties and the average relative density of the gross volume.
[0079] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.
Claims
1. A method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker, characterized in that: The following steps are involved: Step 1: Compound and modify the Vitalinker, 60-mesh waste rubber powder and base asphalt to obtain rubber asphalt; Step 2: Evenly mix the rubber asphalt, reactive diluent and mineral material to obtain a cold mix rubber asphalt mixture.
2. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: The 60-mesh waste rubber powder accounts for 18-22 wt% of the base asphalt mass.
3. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: The Vitalinker accounts for 4-5wt% of the mass of 60-mesh waste rubber powder.
4. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: The reactive diluent accounts for 13-20 wt% of the rubber asphalt mass.
5. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: The mass ratio of the rubber asphalt to the mineral material is 5.5-6:
100.
6. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: In step 1, the preparation of rubber asphalt is specifically the following process: heating the base asphalt to 160-180°C, stirring with a high-speed disperser at 2400-2600r / min, adding measured 60-mesh waste rubber powder in batches during stirring, and finally adding a measured Vitalinker, heating to 170-190°C, stirring for 50-70 minutes, and incubating in an oven at 170-190°C for 1-3 hours; obtaining rubber asphalt.
7. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 1, characterized in that: The specific steps of step 2 are: (1) adding a reactive diluent to the rubber asphalt, stirring it evenly at 100-120° C., cooling it to 75-85° C. for standby use, and obtaining raw material A; (2) adding the aggregate to a mixing pot, heating it to 75-85° C., adding raw material A, and stirring evenly to obtain a cold-mixed rubber asphalt mixture.
8. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 5, characterized in that: The mineral material comprises aggregate and cement in a mass ratio of 93.5-94.5:
6.
9. The method for preparing a cold-mix rubber asphalt mixture based on a Vitalinker according to claim 8, characterized in that: The aggregate is graded according to AC-16; the raw materials of the aggregate include the following components: by mass, 33 to 35 parts of 10 to 15 mm aggregate, 28 to 32 parts of 5 to 10 mm aggregate, 8 to 12 parts of 3 to 5 mm aggregate, and 18 to 22 parts of 0 to 3 mm aggregate.
10. A cold mix rubber asphalt mixture prepared by the method for preparing a cold mix rubber asphalt mixture based on a Vitalinker according to any one of claims 1 to 9.