Anti-aging high-viscosity high-elasticity modified asphalt and preparation method thereof

Abstract

The invention relates to anti-aging high-viscosity high-elasticity modified asphalt and a preparation method thereof. The anti-aging high-viscosity high-elasticity modified asphalt is prepared from SBS, asphalt, a stabilizer, nitrile rubber powder, a zinc oxide compound and water. The zinc oxide compound comprises modified zinc oxide and zinc cinnamate. The method has the effect of improving the anti-aging performance and mechanical strength of the asphalt.

Description

Technical Field

[0001] The present application relates to the field of asphalt, and in particular to an aging-resistant, high-viscosity, high-elasticity modified asphalt and a preparation method thereof. Background Art

[0002] Asphalt is a black or dark mixture that comes from natural or artificial sources. It is mainly composed of high molecular weight hydrocarbons and is in the form of solid, semi-solid or viscous liquid at room temperature. It is usually used in road engineering, waterproofing projects, etc.

[0003] During long-term use, asphalt is exposed to ultraviolet rays, temperature changes, etc., which accelerates its aging process, causing the stability of asphalt to decrease, and its structural performance to decline, affecting safety. Summary of the Invention

[0004] In order to improve the aging resistance of asphalt, the present application provides an aging-resistant, high-viscosity and high-elasticity modified asphalt and a preparation method thereof.

[0005] In the first aspect, the present application provides an aging-resistant, high-viscosity, high-elasticity modified asphalt, which adopts the following technical solution: Disclosed is an aging-resistant, high-viscosity, high-elasticity modified asphalt, comprising SBS, asphalt, a stabilizer, nitrile rubber powder, a zinc oxide compound, and water; the zinc oxide compound comprises modified zinc oxide and zinc cinnamate.

[0006] By adopting the above technical solution, after adding rubber to the asphalt system, the nitrile rubber powder has a high specific surface area and a porous structure. After being added to the asphalt, it will adsorb the light components in the asphalt, reducing the dispersion medium in the asphalt colloid system and significantly increasing the viscosity. The double bonds in the rubber molecular chain undergo a swelling reaction with the asphalt components. After absorbing water, the rubber particles expand to form a three-dimensional network structure. This structure restricts the free movement of the asphalt molecules, increasing the viscosity and giving the material elasticity. The zinc oxide complex can absorb ultraviolet rays to effectively reduce the aging effects of ultraviolet rays on the asphalt system. At the same time, a large number of oxygen free radicals are generated during the aging process of asphalt, and the hydroxyl groups and lattice oxygen on the surface of the zinc oxide complex capture the free radicals, further improving the aging resistance of the system. The carboxyl group of zinc cinnamate can be adsorbed on the asphalt or colloid surface through hydrogen bonding or polar effects, enhancing the stability of the asphalt colloid structure. At the same time, it can play a synergistic anti-aging role with the zinc oxide complex. As a filler for asphalt and rubber, the zinc oxide complex can also form a stable structure, further improving the overall stability of the system.

[0007] Preferably, the modified zinc oxide raw materials include acidified silicate, urea and zinc acetate.

[0008] By adopting the above technical solution, the surface of the acidified silicate has active sites, and a composite system of zinc oxide and silicate is formed through the reaction of urea and zinc acetate. The two can synergistically resist UV performance, further enhance the anti-aging effect of the asphalt system, and further enhance the stability of the asphalt system.

[0009] Preferably, the modified zinc oxide is prepared by the following method: Silicate is mixed with water to obtain a silicate suspension, hydrochloric acid is added to the silicate suspension, sodium chloride is added and stirred, the mixture is filtered, washed and dried to obtain an acidified silicate; the acidified silicate is mixed with water, stirred to obtain an acidified silicate suspension, zinc acetate, water and ethanol are mixed and added to the acidified silicate suspension, urea is added after ultrasonication to obtain a mixed solution, the mixture is stirred, washed and dried, and calcined to obtain modified zinc oxide.

[0010] By adopting the above technical solution and the homogeneous precipitation method, the zinc oxide precursor is precipitated on the surface of the silicate. The zinc oxide precursor loaded on the silicate surface is converted into zinc oxide particles by thermal decomposition. The prepared modified zinc oxide has good stability and can synergistically improve the overall UV resistance and aging resistance of the asphalt system.

[0011] Preferably, the mass ratio of the acidified silicate, zinc acetate and urea is 1:(6.5-6.9):5.

[0012] By adopting the above technical solution, preferably the mass ratio of the acidified silicate, zinc acetate and urea is within the above range, which can further improve the stability of the prepared zinc oxide composite.

[0013] Preferably, the zinc oxide composite is prepared by the following method: Cinnamic acid is mixed with water, stirred, and then sodium hydroxide is added to obtain sodium cinnamate; zinc chloride is mixed with water to obtain a zinc chloride solution; the zinc chloride solution is mixed with sodium cinnamate, magnetically stirred for reaction, filtered, and dried to obtain zinc cinnamate; zinc cinnamate, modified zinc oxide, and an organic intercalant are added to water, heated and stirred, filtered, and dried to obtain a zinc oxide complex.

[0014] By adopting the above technical solution, cinnamic acid is one of the effective ingredients in cinnamon essential oil, which is an unsaturated aromatic carboxylic acid organic compound. After reacting with sodium hydroxide, sodium cinnamate is obtained. The obtained complex has a benzene ring structure, which is then combined with zinc chloride to form zinc cinnamate. It can effectively improve the comprehensive properties of rubber and has good bonding properties, so that a stable cross-linked structure is formed between asphalt and rubber, further improving the overall stability of the system. At the same time, zinc cinnamate has good antioxidant properties and can synergistically improve the overall anti-aging performance of the system.

[0015] Preferably, the pH value of the zinc chloride solution is 5.5-6.5.

[0016] By adopting the above technical solution, the pH value of the zinc chloride solution is preferably within the above range, which can further improve the comprehensive performance of the prepared zinc cinnamate.

[0017] Preferably, the mass ratio of cinnamic acid, sodium hydroxide and zinc chloride is 2.2:(0.55-0.65):1.

[0018] By adopting the above technical solution, the mass ratio of cinnamic acid, sodium hydroxide and zinc chloride is preferably within the above range, which can further improve the overall stability of the prepared zinc cinnamate.

[0019] Preferably, the organic intercalant comprises cetyltrimethylammonium bromide.

[0020] By adopting the above technical solution and using hexadecyltrimethylammonium bromide as an organic intercalant, the voids of the prepared zinc oxide composite can be effectively adjusted, thereby increasing the interlayer spacing of the system, improving the dispersibility in the system, and increasing the active sites, resulting in a more stable connection effect between the asphalt and rubber, thereby improving the overall stability of the system.

[0021] Preferably, the mass ratio of the modified zinc oxide, zinc cinnamate and cetyltrimethylammonium bromide is 1:(0.3-0.5):0.7.

[0022] By adopting the above technical solution, the mass ratio of modified zinc oxide, zinc cinnamate and cetyltrimethylammonium bromide is preferably within the above range, which can further improve the overall stability of the prepared system.

[0023] In a second aspect, the present application provides a method for preparing aging-resistant, high-viscosity, and high-elastic modified asphalt, which adopts the following technical solution: A method for preparing aging-resistant, high-viscosity, and high-elasticity modified asphalt comprises the following steps: SBS, asphalt, nitrile rubber, zinc oxide compound and water are mixed and stirred to obtain aging-resistant, high-viscosity and high-elastic modified asphalt.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. In this application, the addition of nitrile rubber powder to the asphalt system effectively improves the overall viscosity and elasticity of the system. Furthermore, the zinc oxide complex added to the system absorbs ultraviolet rays and captures free radicals generated during asphalt aging, effectively reducing the aging process. Zinc cinnamate adsorbs on the asphalt and rubber surfaces through hydrogen bonds, forming a stable network structure and further enhancing the overall stability of the system. 2. Modified zinc oxide is added to the asphalt system. After the active sites on the surface of the acidified silicate react with zinc acetate, the modified zinc oxide is obtained through a urea reaction. This can further connect the asphalt and rubber systems, improving the overall stability of the system. The acidified silicate also has the ability to absorb ultraviolet rays. When combined with zinc oxide, it improves the anti-ultraviolet performance of the system and further enhances the anti-aging performance of the system. 3. The complex obtained by the acid-base reaction of zinc chloride and cinnamic acid has a benzene ring structure, which can form a stable structure with the rubber, thereby improving the comprehensive performance of the rubber, further enhancing the overall stability of the system, and synergistically improving the overall antioxidant properties of the system. DETAILED DESCRIPTION

[0025] The present application is further described in detail below with reference to the embodiments: Raw materials: All raw materials in the examples are commercially available; among them, the stabilizer is sulfur (CAS No.: 7704-34-9).

[0026] Example 1 Preparation of modified zinc oxide: Silicate (CAS No.: 12627-13-3) was added to deionized water and stirred to obtain a silicate suspension. Hydrochloric acid was added to the silicate suspension and stirred. Sodium chloride was added and stirred at 500 rpm in a water bath at 60°C for 2 h. After filtration, the mixture was washed with deionized water and dried to obtain a pre-treated silicate. 24 g of the pre-treated silicate was added to deionized water and stirred to obtain a pre-treated silicate suspension. 156 g of zinc acetate (CAS No.: 5 57-34-6), 300 g of deionized water and 106 g of ethanol were mixed and added to the pretreated silicate suspension, ultrasonically treated for 15 min, and then 120 g of urea (CAS No.: 57-13-6) was added to obtain a mixed solution, and the mixed solution was stirred at 200 rpm in a water bath at 85 ° C for 3 h. Finally, the mixture was washed with ethanol, dried at 80 ° C for 8 h, and then calcined in a muffle furnace at 350 ° C for 2 h, and ground to obtain modified zinc oxide.

[0027] Preparation of zinc oxide complex: 58.66 g of cinnamic acid (CAS No.: 621-82-9) was mixed with 300 g of deionized water, stirred at a constant temperature at 40 rpm for 15 min, and then 14.67 g of sodium hydroxide was added to obtain sodium cinnamate. 26.67 g of zinc chloride was mixed with 100 g of deionized water to obtain a zinc chloride (CAS No.: 7646-85-7) solution. Hydrochloric acid was then added to adjust the pH of the zinc chloride solution to 5.5. The zinc chloride solution was then mixed with the sodium cinnamate, and the mixture was stirred under magnetic stirring for 20 min. After standing and filtering, the mixture was dried in a 50° C. oven for 12 h to obtain zinc cinnamate. 15 g of zinc cinnamate, 50 g of modified zinc oxide, and 35 g of an organic intercalant were added to 200 g of deionized water, the temperature was raised to 80° C., and the mixture was stirred at 200 rpm for 2 h. After filtering, the mixture was dried in a vacuum drying oven at 60° C. to obtain a zinc oxide complex. The organic intercalant is hexadecyltrimethylammonium bromide (CAS No.: 57-09-0).

[0028] Preparation of aging-resistant, high-viscosity and high-elasticity modified asphalt: After mixing 30g of SBS with 200g of asphalt, add 1g of stabilizer, shear at 170°C for 40min with an emulsifying dispersant, then add 60g of nitrile rubber, 50g of zinc oxide complex and 100g of deionized water, mix and stir for 2h to obtain aging-resistant, high-viscosity and high-elastic modified asphalt.

[0029] Example 2 Preparation of modified zinc oxide: Silicate was added to deionized water and stirred to obtain a silicate suspension. Hydrochloric acid was added to the silicate suspension, and sodium chloride was added after stirring. The mixture was stirred at 500 rpm in a water bath at 60°C for 2 h. After filtration, it was washed with deionized water and dried to obtain a pretreated silicate. 23.26 g of the pretreated silicate was added to deionized water and stirred to obtain a pretreated silicate suspension. 160.47 g of zinc acetate, 300 g of deionized water and 106 g of ethanol were mixed and added to the pretreated silicate suspension. The mixture was ultrasonically treated for 15 min, and then 116.27 g of urea was added to obtain a mixed solution. The mixed solution was stirred at 200 rpm in a water bath at 85°C for 3 h. Finally, the mixture was washed with ethanol, dried at 80°C for 8 h, and then calcined in a muffle furnace at 350°C for 2 h. Modified zinc oxide was obtained after grinding.

[0030] Preparation of zinc oxide complex: 57.15 g of cinnamic acid was mixed with 300 g of deionized water, and stirred at a constant temperature at 40 rpm for 15 min. Then, 16.88 g of sodium hydroxide was added to obtain sodium cinnamate. 25.97 g of zinc chloride was mixed with 100 g of deionized water to obtain a zinc chloride solution. Hydrochloric acid was added to adjust the pH of the zinc chloride solution to 6.5. The zinc chloride solution was then mixed with the sodium cinnamate, and the mixture was stirred under magnetic stirring for 20 min. The mixture was allowed to stand and filtered. The mixture was dried in an oven at 50°C for 12 hours to obtain zinc cinnamate. 22.73 g of zinc cinnamate, 45.45 g of modified zinc oxide, and 31.82 g of an organic intercalant were added to 200 g of deionized water, the temperature was raised to 80°C, and the mixture was stirred at 200 rpm for 2 hours. After filtration, the mixture was dried in a vacuum drying oven at 60°C to obtain a zinc oxide complex; wherein the organic intercalant was hexadecyltrimethylammonium bromide (CAS No.: 57-09-0).

[0031] Preparation of aging-resistant, high-viscosity and high-elasticity modified asphalt: After mixing 70g of SBS and 400g of asphalt, add 1g of stabilizer, shear at 170°C for 40min with an emulsifying dispersant, then add 80g of nitrile rubber, 60g of zinc oxide complex and 200g of deionized water, mix and stir for 2h to obtain aging-resistant, high-viscosity and high-elastic modified asphalt.

[0032] Example 3 Preparation of modified zinc oxide: Silicate was added to deionized water and stirred to obtain a silicate suspension. Hydrochloric acid was added to the silicate suspension, and sodium chloride was added after stirring. The mixture was stirred at 500 rpm in a water bath at 60°C for 2 h. After filtration, it was washed with deionized water and dried to obtain a pretreated silicate. 23.62 g of the pretreated silicate was added to deionized water and stirred to obtain a pretreated silicate suspension. 158.27 g of zinc acetate, 300 g of deionized water and 106 g of ethanol were mixed and added to the pretreated silicate suspension. The mixture was ultrasonically treated for 15 min, and then 118.11 g of urea was added to obtain a mixed solution. The mixed solution was stirred at 200 rpm in a water bath at 85°C for 3 h. Finally, the mixture was washed with ethanol, dried at 80°C for 8 h, and then calcined in a muffle furnace at 350°C for 2 h. Modified zinc oxide was obtained after grinding.

[0033] Preparation of zinc oxide complex: 57.89 g of cinnamic acid was mixed with 300 g of deionized water, stirred at a constant temperature at 40 rpm for 15 min, and then 15.79 g of sodium hydroxide was added to obtain sodium cinnamate. 25.32 g of zinc chloride was mixed with 100 g of deionized water to obtain a zinc chloride solution, and then hydrochloric acid was added to adjust the pH of the zinc chloride solution to 6. The zinc chloride solution was then mixed with sodium cinnamate, and the reaction was stirred under magnetic stirring for 20 min, and then filtered and allowed to stand. The mixture was dried in an oven at 50°C for 12 h to obtain zinc cinnamate. 19.05 g of zinc cinnamate, 47.62 g of modified zinc oxide, and 33.33 g of an organic intercalant were added to 200 g of deionized water, the temperature was raised to 80°C, and the mixture was stirred at 200 rpm for 2 h. After filtration, the mixture was dried in a vacuum drying oven at 60°C to obtain a zinc oxide complex; wherein the organic intercalant was hexadecyltrimethylammonium bromide (CAS No.: 57-09-0).

[0034] Preparation of aging-resistant, high-viscosity and high-elasticity modified asphalt: After mixing 50g of SBS and 300g of asphalt, add 1g of stabilizer, shear at 170°C for 40min with an emulsifying dispersant, then add 70g of nitrile rubber, 55g of zinc oxide complex and 150g of deionized water, mix and stir for 2h to obtain aging-resistant, high-viscosity and high-elastic modified asphalt.

[0035] Example 4 Example 4 is based on Example 3. The difference between Example 4 and Example 3 is that in Example 4, when preparing modified zinc oxide, 24.59 g of pre-treated silicate, 152.46 g of zinc acetate, and 122.95 g of urea are used.

[0036] Example 5 Example 5 is based on Example 3. The difference between Example 5 and Example 3 is that in Example 5, when preparing modified zinc oxide, 22.73 g of pre-treated silicate, 163.64 g of zinc acetate, and 113.63 g of urea are used.

[0037] Example 6 Example 6 is based on Example 3. The difference between Example 6 and Example 3 is that in Example 6, when preparing zinc cinnamate, 60.27 g of cinnamic acid, 12.33 g of sodium hydroxide, and 27.4 g of zinc chloride are used.

[0038] Example 7 Example 7 is based on Example 3. The difference between Example 7 and Example 3 is that in Example 7, when preparing zinc cinnamate, 55.69 g of cinnamic acid, 18.99 g of sodium hydroxide, and 25.32 g of zinc chloride are used.

[0039] Example 8 Example 8 is based on Example 3. The difference between Example 8 and Example 3 is that in Example 8, when preparing zinc cinnamate, the pH value during the reaction is 5.

[0040] Example 9 Example 9 is based on Example 3. The difference between Example 9 and Example 3 is that in Example 9, when preparing zinc cinnamate, the pH value during the reaction is 7.

[0041] Example 10 Example 10 is based on Example 3. The difference between Example 10 and Example 3 is that in Example 10, when preparing the zinc oxide composite, 52.63 g of modified zinc oxide, 10.53 g of zinc cinnamate, and 36.84 g of cetyltrimethylammonium bromide are used.

[0042] Example 11 Example 11 is based on Example 3. The difference between Example 11 and Example 3 is that in Example 11, when preparing the zinc oxide composite, 43.48 g of modified zinc oxide, 26.09 g of zinc cinnamate, and 30.43 g of cetyltrimethylammonium bromide are used.

[0043] Example 12 Example 12 is based on Example 3. The difference between Example 12 and Example 3 is that in Example 12, when preparing modified zinc oxide, zinc cinnamate is replaced by a mixture of cinnamic acid and nano zinc oxide in a mass ratio of 1:1.

[0044] Comparative Example 1 Comparative Example 1 is based on Example 3. In Comparative Example 1, zinc cinnamate is replaced by cinnamic acid when preparing modified zinc oxide.

[0045] Comparative Example 2 Comparative Example 2 is based on Example 3. In Comparative Example 2, when preparing the zinc oxide composite, the modified zinc oxide is replaced with ordinary nano zinc oxide.

[0046] Performance testing The samples of Examples 1-12 and Comparative Examples 1-2 were sampled and subjected to the following performance tests: (1) UV aging The samples were subjected to UV aging in a UV aging box with an UV intensity of 1200 μw / cm2, an aging temperature of 60°C, and an aging time of 6 days. The performance of each sample was tested. Each sample was tested 3 times, and the average value was taken. The test results were filled in Table 1.

[0047] (2) Mechanical properties: The compressive strength of the sample was tested according to GB / T 50784-2013. Table 1 Performance test results of samples of Examples 1-12 and Comparative Examples 1-2 Combined with Table 1, it can be seen that the UV aging values ​​of Examples 1-3 are all 6°C or below at the softening point, and the residual penetration ratio is all 85% or above, indicating that the modified asphalt prepared in this application has good resistance to UV aging; the tensile strength of Examples 1-3 is all 39.2 MPa or above, the compressive strength is all 39.2 MPa or above, and the flexural strength is all 10.1 MPa or above, indicating that the modified asphalt prepared in this application has good compressive strength and flexural strength.

[0048] In Examples 4 and 5, when preparing modified zinc oxide, the mass ratios of the pre-treated silicate, zinc acetate, and urea are all outside the range defined in the present application. When the amount of zinc acetate used is too small, it is difficult to uniformly form nano-zinc oxide particles on the surface of the silicate, and it is difficult to synergistically improve the overall UV aging resistance and thermal aging performance of the system with the silicate. When the content of zinc acetate is too high, too many nano-zinc oxide particles are formed on the surface of the silicate, which reduces the particle size uniformity of the modified zinc oxide and makes it difficult to further improve its stability in the system, affecting the overall stability of the system. Therefore, the performance of Examples 4 and 5 is reduced.

[0049] In Examples 6 and 7, when preparing zinc cinnamate, the mass ratios of cinnamon, sodium hydroxide, and zinc chloride are all outside the range defined in the present application. When the content of sodium hydroxide is too low, the stability of the prepared sodium cinnamate is difficult to further improve, the binding performance between the sodium cinnamate and zinc chloride decreases, and the stability of the formed zinc cinnamate decreases. When the content of sodium hydroxide is too high, the generated sodium cinnamate contains other by-products, which affects the stability of the system and the product quality of the zinc cinnamate also decreases. Therefore, the performance of Examples 6 and 7 is reduced.

[0050] In Examples 8 and 9, when preparing zinc cinnamate, the pH of the system during the reaction was not within the range specified in the present application. When the pH during the reaction was too low, the content of zinc ions in the system was too low, making it difficult to further combine with sodium cinnamate to obtain stable zinc cinnamate. When the pH during the reaction was too high, zinc ions reacted with hydroxide to form zinc hydroxide precipitate, which was also difficult to combine with sodium cinnamate to form stable zinc cinnamate. Therefore, the performance of Examples 8 and 9 was reduced.

[0051] In Examples 10 and 11, when preparing the zinc oxide composite, the mass ratios of modified zinc oxide, zinc cinnamate and cetyltrimethylammonium bromide are not within the range specified in this application. When the content of cetyltrimethylammonium bromide is too little, the dispersion performance of the prepared zinc oxide composite in the system is difficult to further improve, and agglomeration occurs in the system, affecting the overall stability of the system; when the content of cetyltrimethylammonium bromide is too much, the interface bonding ability of the prepared zinc oxide composite decreases, and the bonding performance with the asphalt and rubber components decreases, affecting the overall stability of the system. Therefore, the performance of Examples 10 and 11 are both reduced.

[0052] In Example 12, zinc cinnamate was replaced by a mixture of cinnamic acid and nano-zinc oxide. The binding performance of the components of the ordinary physical mixture was reduced, and it was difficult to further synergistically improve the overall anti-ultraviolet aging and heat aging performance of the system. Therefore, the performance of Example 12 was reduced.

[0053] In Comparative Example 1, zinc cinnamate is replaced by cinnamic acid. The stability of ordinary cinnamic acid in the system is reduced, and it is difficult to further synergistically improve the overall anti-ultraviolet aging and anti-heat aging performance of the system.

[0054] In Comparative Example 2, the modified zinc oxide is replaced with ordinary nano zinc oxide. The dispersion performance of the composite nano zinc oxide in the system is difficult to be further modified, and agglomerates occur in the system, which affects the overall stability of the system and is difficult to synergistically improve the overall aging resistance of the system.

[0055] This specific embodiment is merely an explanation of the present application and does not limit the present application. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present application. The technical scope of the present application is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. An aging-resistant, high-viscosity, high-elasticity modified asphalt, characterized by: Including SBS, asphalt, stabilizer, nitrile rubber powder, zinc oxide compound, water; The zinc oxide composite comprises modified zinc oxide and zinc cinnamate.

2. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 1, characterized in that: The modified zinc oxide raw materials include acidified silicate, urea and zinc acetate.

3. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 2, characterized in that: The modified zinc oxide is prepared by the following method: Silicate is mixed with water to obtain a silicate suspension, hydrochloric acid is added to the silicate suspension, sodium chloride is added and stirred, the mixture is filtered, washed and dried to obtain an acidified silicate; the acidified silicate is mixed with water, stirred to obtain an acidified silicate suspension, zinc acetate, water and ethanol are mixed and added to the acidified silicate suspension, urea is added after ultrasonication to obtain a mixed solution, the mixture is stirred, washed and dried, and calcined to obtain modified zinc oxide.

4. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 3, characterized in that: The mass ratio of the acidified silicate, zinc acetate and urea is 1:(6.5-6.9):

5.

5. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 1, characterized in that: The zinc oxide composite is prepared by the following method: Cinnamic acid is mixed with water, stirred, and then sodium hydroxide is added to obtain sodium cinnamate; zinc chloride is mixed with water to obtain a zinc chloride solution; the zinc chloride solution is mixed with sodium cinnamate, magnetically stirred for reaction, filtered, and dried to obtain zinc cinnamate; zinc cinnamate, modified zinc oxide, and an organic intercalant are added to water, heated and stirred, filtered, and dried to obtain a zinc oxide complex.

6. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 5, characterized in that: The pH value of the zinc chloride solution is 5.5-6.

5.

7. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 5, characterized in that: The mass ratio of the cinnamic acid, sodium hydroxide and zinc chloride is 2.2:(0.55-0.65):

1.

8. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 5, characterized in that: The organic intercalant includes cetyltrimethylammonium bromide.

9. The aging-resistant, high-viscosity, high-elasticity modified asphalt according to claim 8, characterized in that: The mass ratio of the modified zinc oxide, zinc cinnamate and cetyltrimethylammonium bromide is 1:(0.3-0.5):0.

7.

10. A method for preparing the aging-resistant, high-viscosity, high-elasticity modified asphalt according to any one of claims 1 to 9, characterized in that: The steps include: SBS, asphalt, nitrile rubber powder, zinc oxide compound and water are mixed and stirred to obtain aging-resistant, high-viscosity and high-elastic modified asphalt.

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