A weather-resistant permeable asphalt pavement regeneration agent and preparation method thereof

Abstract

The present application relates to the technical field of road materials, and in particular to a weather-resistant penetrating asphalt pavement regeneration agent and a preparation method thereof. A weather-resistant penetrating asphalt pavement regeneration agent, by mass, includes the following raw materials: 70-75 parts of pure waste oil, 4-6 parts of diluent, 3-4 parts of plasticizer, 1-2 parts of epoxidized modified graphene penetrant, 0.5-0.8 parts of antioxidant, 0.3-0.4 parts of anti-ultraviolet agent, 2-3 parts of penetrant, 8-10 parts of modifier, wherein the modifier is prepared by mixing alkylphenol polyoxyethylene ether, ethylene bisstearic acid amide and ethylene-acrylate-methacrylate glycidyl ester in a mass ratio of 3:2:1-3. The weather-resistant penetrating asphalt pavement regeneration agent of the present application has significant advantages in repairing waste asphalt, reducing costs, improving weather resistance and penetration performance, environmental protection performance, etc., and is an efficient, economical and environmentally friendly pavement regeneration solution.

Description

Technical Field

[0001] The present application relates to the technical field of road materials, and in particular to a weather-resistant and permeable asphalt pavement regeneration agent and a preparation method thereof. Background Art

[0002] Asphalt pavement, with its excellent performance, has attracted widespread attention and use. However, with the continuous advancement of asphalt pavement construction on highways, some asphalt pavements have gradually aged to varying degrees and entered the maintenance and repair period, resulting in the generation of a large amount of waste asphalt mixture. How to rationally utilize waste asphalt mixture to reduce environmental pollution and resource waste while saving road maintenance costs has become a common concern among road workers, and the recycling of waste asphalt has also become a hot topic.

[0003] Numerous road engineering professionals are constantly exploring and developing different asphalt pavement regeneration agents to effectively address technical challenges such as the regeneration of waste asphalt, the effective integration of new and old asphalt, and increasing the dosage of waste asphalt mixtures. As a result, a wide variety of asphalt pavement regeneration agents have emerged. However, most of these agents suffer from the following common problems, which have limited their widespread application: First, the direct formulation of regeneration agents based on the lost components of waste asphalt results in high costs and an inability to effectively repair the molecular structure of asphalt broken due to aging; second, excessive focus on increasing the dosage of waste asphalt while ignoring the weather resistance and permeability of asphalt regeneration agents, resulting in poor durability; and third, some asphalt regeneration agents prepared using waste motor oil or waste cooking oil have poor stability, resulting in poor performance. Therefore, there is an urgent need to develop new asphalt pavement regeneration agents to overcome the existing problems of inability to repair the molecular structure of waste asphalt, high cost, poor weather resistance, poor permeability, and poor stability. Summary of the Invention

[0004] The purpose of this application is to address the deficiencies of current technology and provide a weather-resistant and penetrating asphalt pavement regeneration agent and a preparation method thereof. The weather-resistant and penetrating asphalt pavement regeneration agent of this application can efficiently repair the molecular structure of waste asphalt, has low cost, excellent weather resistance, excellent penetration performance and high stability.

[0005] In the first aspect, the present application provides a weather-resistant penetrating asphalt pavement regeneration agent, which adopts the following technical scheme: a weather-resistant penetrating asphalt pavement regeneration agent, which includes the following raw materials, calculated by weight: 70-75 parts of pure waste oil, 4-6 parts of diluent, 3-4 parts of plasticizer, 1-2 parts of epoxidized modified graphene penetrant, 0.5-0.8 parts of antioxidant, 0.3-0.4 parts of anti-ultraviolet agent, 2-3 parts of penetrant, and 8-10 parts of modifier.

[0006] By adopting the above technical solution, waste engine oil: As the base oil, waste engine oil provides the essential oiliness and fluidity of the regeneration agent. It is easily accessible and has good solubility with other components, while reducing production costs and enabling the recycling of waste engine oil. Diluent: The diluent is used to adjust the viscosity and concentration of the regeneration agent, making it more suitable for penetration and repair work in actual applications. Plasticizer: Plasticizers increase the regeneration agent's softness and plasticity, helping to absorb byproducts produced during asphalt aging, thereby improving the stability of the regeneration agent and the durability of the regenerated asphalt. Epoxidized modified graphene penetrant: Graphene has excellent heat resistance and stability. It adsorbs the oil phase through π-π conjugation and van der Waals forces, improving its stability. Furthermore, the modified graphene enhances its compatibility and dispersibility with the regeneration agent, slowing the aging process of the regenerated asphalt. Asphalt oxidation is the main cause of asphalt aging and performance deterioration. Under the action of heat and oxygen, the methylene groups in the unsaturated molecular chains of the asphalt molecules are oxidized to ketones, while the alkyl groups attached to the benzene rings are oxidized to carboxylic acids. The glycidyl methacrylate of the present application is grafted onto the graphene surface through hydrolysis condensation or Diels-Alder reaction to form a glycidyl methacrylate penetrant with polar epoxy groups on the surface. The polar epoxy groups on its surface can react chemically with asphaltene to weaken the strong attraction between asphaltene molecules, thereby causing the condensed asphaltene in the aged asphalt to be redissolved and dispersed in the asphalt colloid system, destroying the spatial network structure formed by the agglomeration of asphaltene, and weakening the hindrance of the asphaltene spatial network structure to the penetration of regeneration agent molecules, thereby improving and accelerating the penetration ability of the regeneration agent. Antioxidants: Antioxidants help prevent the performance degradation of asphalt due to oxidation during storage and use. Anti-ultraviolet agents: Anti-ultraviolet agents protect the regeneration agent from the effects of ultraviolet radiation, extending its service life and effectiveness. Penetrants: Penetrants enhance the penetration ability of the regeneration agent, enabling it to more effectively repair the structure of waste asphalt. Modifier: The alkylphenol polyoxyethylene ether and ethylene bisstearamide in the modifier provide dispersing and lubricating properties, while ethylene acrylate-glycidyl methacrylate enhances compatibility and volume expansion. These ingredients work together to improve the dispersion of aged asphaltene in the oil and enhance the penetration of the rejuvenator. This combined effect enables the rejuvenator to effectively repair the molecular structure of waste asphalt, improving its weather resistance, permeability, and stability. Furthermore, this formulation offers the advantages of low cost, environmental friendliness, a wide range of raw material sources, and low dependence on petroleum products.

[0007] Preferably, the modifier is prepared by mixing alkylphenol polyoxyethylene ether, ethylene bisstearamide and ethylene-acrylate-glycidyl methacrylate in a mass ratio of 3:2:1-3.

[0008] By employing the above technical solution, the combination of alkylphenol polyoxyethylene ether and ethylene bisstearamide exhibits excellent dispersing and lubricating properties. They promote the dispersion of aged asphaltene in the oil fraction, reducing the dispersed particle size, thereby improving the fluidity and uniformity of the asphalt under heat. Ethylene acrylate-glycidyl methacrylate has a compatibilizing effect. Its epoxy groups react with the terminal hydroxyl and carboxyl groups of the waste engine oil, increasing compatibility and promoting crosslinking between the aged asphaltene and the waste engine oil, blurring the interfacial bonding area. Furthermore, the ester groups in ethylene acrylate-glycidyl methacrylate further enhance the compatibilizing effect of the regeneration agent. The combination of alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene acrylate-glycidyl methacrylate produces a synergistic effect. They work together to enhance the penetration and compatibility of the regeneration agent between the aged asphaltene and the waste engine oil. This synergistic effect helps to better repair the molecular structure of the waste asphalt and restore its original properties. In summary, modifiers contribute to the repair effectiveness of asphalt pavement regeneration agents on aged asphalt through various mechanisms, including dispersion, lubrication, and volume expansion. Furthermore, the use of modifiers enhances the regeneration agent's penetration and compatibility, thereby improving the overall performance and stability of the regenerated asphalt.

[0009] Preferably, the preparation method of the epoxidized modified graphene penetrant is as follows: after uniformly mixing 6-8 parts of glycidyl methacrylate, 500 parts of ethanol and 50 parts of water by mass, 100 parts of graphene oxide are added and stirred for 5-7 hours, heated to 75°C, refluxed for 60 minutes, filtered and dried to obtain the epoxidized modified graphene penetrant.

[0010] By adopting the above technical solution, glycidyl methacrylate is grafted onto the surface of graphene to form a penetrant with polar epoxy groups. These polar epoxy groups can react chemically with asphaltene, weaken the attraction between asphaltene molecules, and promote the asphaltene in the aged asphalt to be redissolved and dispersed in the asphalt colloid system. This helps to destroy the spatial network structure formed by the agglomeration of asphaltene, thereby improving and accelerating the penetration ability of the regeneration agent. Graphene itself has a large specific surface area and good heat resistance. After epoxidation modification, its compatibility and dispersibility with the regeneration agent are enhanced. This enables graphene to effectively delay the aging process of regenerated asphalt, especially the performance against secondary aging is significantly improved. In summary, the epoxidation-modified graphene penetrant plays a key role in this application. It not only improves the penetration ability and heat resistance and aging resistance of the regeneration agent, but also promotes the dispersion and compatibility of aged asphaltene, and increases the stability and environmental friendliness of the regeneration agent.

[0011] Preferably, the graphene oxide has a sheet diameter of 0.5 μm-2 μm and a thickness of 0.8 nm-1.5 nm.

[0012] Preferably, the preparation method of the pure waste oil is as follows: filtering the waste oil with a 3.0 μm microporous filter membrane; then heating it to 130°C-150°C for vacuum distillation, and continuously stirring at this temperature for 1h-2h; after cooling it to room temperature, filtering it with a 0.6 μm microporous filter membrane to obtain pure waste oil.

[0013] By adopting the above technical solution, waste engine oil is used as the base oil component. The raw material is easy to obtain, has good mutual solubility with other components, and has a simple preparation process. The manufacturing cost of the asphalt pavement regeneration agent is greatly reduced, and the waste engine oil is also recycled.

[0014] Preferably, the plasticizer is prepared by mixing petroleum sulfonate phenyl ester and epoxy fatty acid butyl ester in a mass ratio of 3:1-2.

[0015] By adopting the above technical solution, phenyl petroleum sulfonate exhibits excellent compatibility and weatherability. This means it maintains stable physical and chemical properties under a wide range of conditions, which is crucial for the long-term use and performance stability of asphalt pavement regeneration agents. The flexibility of epoxy fatty acid butyl esters varies minimally with temperature. This allows the regenerated asphalt to maintain excellent physical properties at varying temperatures. This stability contributes to the high-temperature stability of the regenerated asphalt, particularly under high-temperature conditions. When phenyl petroleum sulfonate and epoxy fatty acid butyl ester are combined, they accelerate their integration with clean waste oil and aged asphalt. This integration improves the temperature sensitivity of the regenerated asphalt, thereby enhancing its overall performance. This plasticizer combination not only improves the stability of the regenerator but also enhances its penetration. This is because they help the regenerator better penetrate the asphalt molecular structure, thereby more effectively repairing and restoring the asphalt's properties. In summary, the combination of phenyl petroleum sulfonate and epoxy fatty acid butyl ester plays a key role in improving the compatibility, weatherability, stability, and penetration of asphalt pavement regeneration agents. This combination not only enhances the performance of the regenerator but also ensures its long-term stability and effectiveness under various environmental conditions.

[0016] Preferably, the penetrant is prepared by mixing fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester in a mass ratio of 1:1-2.

[0017] By adopting the above technical solution, a mixture of fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester can improve the permeability of asphalt. Fatty alcohol polyoxyethylene ether has good surface activity and can reduce surface tension, thereby enhancing the penetration ability of asphalt molecules in aged asphalt. At the same time, fatty acid polyoxyethylene ester also has similar properties, and the combination of the two can further enhance the penetration effect. The mixture of fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester can improve the compatibility between asphalt and regeneration agent. Fatty alcohol polyoxyethylene ether has good lipophilicity and hydrophilicity, which can promote the mixing and uniform distribution of asphalt and regeneration agent. Fatty acid polyoxyethylene ester has good stability and can improve the stability of regeneration agent under high and low temperature conditions, thereby ensuring that the performance of regenerated asphalt is not affected by external temperature changes. Fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester are both environmentally friendly materials, friendly to the environment, and will not cause pollution to soil and water bodies. In summary, the mixture of fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester plays an important role in asphalt regeneration agent, which not only improves the permeability and compatibility, but also enhances the stability and environmental performance, while being cost-effective.

[0018] Preferably, the anti-ultraviolet agent is prepared by mixing 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone in a mass ratio of 2:1-2.

[0019] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0020] Preferably, the diluent is phenyl glycidyl ether.

[0021] By adopting the above technical solution and adding a certain amount of active diluent containing epoxy groups, the molecular structure of waste asphalt can be effectively repaired, especially the breaking of unsaturated bonds in modified asphalt, and the original performance of asphalt can be effectively restored.

[0022] In a second aspect, the present application provides a method for preparing a weather-resistant and permeable asphalt pavement regeneration agent, which adopts the following technical solution: As a general technical concept, the present application also provides a method for preparing the above-mentioned weather-resistant and permeable asphalt pavement regeneration agent, comprising the following steps: S101. After heating the purified waste oil to 120° C. by weight, slowly add the diluent, keep warm and stir for 0.5 h-1 h, then slowly add the plasticizer and stir for 30-40 min, then gradually reduce the temperature to 55° C. to obtain a mixed solution; S102. Add epoxidized modified graphene penetrant, antioxidant, anti-ultraviolet agent, penetrant and modifier to the mixed solution in order according to their mass fractions. Stir at 100 r / min for 0.3-0.5 h, and then cool naturally to room temperature to obtain a weather-resistant penetrating asphalt pavement regeneration agent.

[0023] In summary, the beneficial technical effects of this application are: 1. Efficiently repair the molecular structure of waste asphalt: By adding active diluents containing epoxy groups, the molecular structure of waste asphalt can be effectively repaired, especially the breakage of unsaturated bonds in modified asphalt, restoring the original performance of asphalt.

[0024] 2. Low cost: Using waste engine oil as the base oil not only reduces costs but also enables the recycling of waste engine oil. At the same time, the selection of modifiers and other additives also takes cost-effectiveness into consideration.

[0025] 3. Excellent weather resistance and penetration performance: The combination of the modifier and the epoxidized modified graphene penetrant improves the weather resistance and penetration ability of the rejuvenator, enabling the rejuvenator to better penetrate and repair the aged asphalt structure.

[0026] 4. High stability: The selection of plasticizers and the use of epoxidized modified graphene improve the stability of the regenerator, enabling it to maintain good performance under various environmental conditions.

[0027] 5. Environmentally friendly and harmless: Due to the use of waste oil and other environmentally friendly materials, it reduces dependence on petroleum products and reduces environmental pollution.

[0028] 6. Wide sources of raw materials: The raw materials used, such as waste oil, are widely available resources, which is conducive to large-scale production and application. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below with reference to the examples, but it will be understood by those skilled in the art that the following examples are merely illustrative of the present application and should not be considered as limiting the scope of the present application. In the examples, if specific conditions are not specified, the conditions are carried out according to conventional conditions or manufacturer recommendations. The reagents or instruments used are not specified by the manufacturer and are conventional products that can be purchased commercially.

[0030] In the following examples and preparation examples, 1 part means 100 g.

[0031] Preparation Example 1 Preparation of pure waste oil The preparation method of pure waste oil is as follows: the waste oil is filtered through a 3.0 μm microporous filter membrane; then the temperature is raised to 140°C for vacuum distillation, and the mixture is kept warm and stirred for 1.5 hours; after cooling to room temperature, the waste oil is filtered through a 0.6 μm microporous filter membrane to obtain pure waste oil.

[0032] Preparation Example 2 Preparation of Epoxidized Modified Graphene Penetrant The preparation method of the epoxidized modified graphene penetrant is as follows: after uniformly mixing 7 parts of glycidyl methacrylate, 500 parts of ethanol, and 50 parts of water by mass, 100 parts of graphene oxide (the sheet diameter of graphene oxide is 0.5 μm-2 μm and the thickness is 0.8 nm-1.5 nm) is added, and the mixture is fully stirred for 6 hours, heated to 75°C, refluxed for 60 minutes, filtered, and dried to obtain the epoxidized modified graphene penetrant.

[0033] Example 1 A weather-resistant penetrating asphalt pavement regeneration agent, comprising the following raw materials, calculated by weight: 70 parts of pure waste engine oil, 4 parts of phenyl glycidyl ether, 3 parts of a plasticizer, 1 part of an epoxidized modified graphene penetrant, 0.5 parts of 2,6-di-tert-butyl-p-cresol, 0.3 parts of an anti-ultraviolet agent, 2 parts of a penetrant, and 8 parts of a modifier, wherein the modifier is prepared by mixing alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene-acrylate-glycidyl methacrylate in a weight ratio of 3:2:1, the plasticizer is prepared by mixing petroleum sulfonate phenyl ester and epoxy fatty acid butyl ester in a weight ratio of 3:1, the penetrant is prepared by mixing fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester in a weight ratio of 1:1, and the anti-ultraviolet agent is prepared by mixing 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone in a weight ratio of 2:1; The preparation method of the above-mentioned weather-resistant penetrating asphalt pavement regeneration agent comprises the following steps: S101. After heating the purified waste oil to 120° C. according to the mass fraction, slowly add phenyl glycidyl ether, keep warm and stir for 0.5 h, then slowly add plasticizer and stir for 40 min, then gradually reduce the temperature to 55° C. to obtain a mixed solution; S102. Add epoxidized modified graphene penetrant, 2,6-di-tert-butyl-p-cresol, anti-ultraviolet agent, penetrant and modifier to the mixed solution in order according to their mass proportions. Stir at 100 r / min for 0.3 h, and then cool naturally to room temperature to obtain a weather-resistant penetrating asphalt pavement regeneration agent.

[0034] Example 2 A weather-resistant penetrating asphalt pavement regeneration agent, comprising the following raw materials, calculated by weight: 75 parts of pure waste engine oil, 6 parts of phenyl glycidyl ether, 4 parts of a plasticizer, 2 parts of an epoxidized modified graphene penetrant, 0.8 parts of 2,6-di-tert-butyl-p-cresol, 0.4 parts of an anti-ultraviolet agent, 3 parts of a penetrant, and 10 parts of a modifier, wherein the modifier is prepared by mixing alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene-acrylate-glycidyl methacrylate in a weight ratio of 3:2:3; the plasticizer is prepared by mixing petroleum sulfonate phenyl ester and epoxy fatty acid butyl ester in a weight ratio of 3:2; the penetrant is prepared by mixing fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester in a weight ratio of 1:2; and the anti-ultraviolet agent is prepared by mixing 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone in a weight ratio of 2:2; The preparation method of the above-mentioned weather-resistant penetrating asphalt pavement regeneration agent comprises the following steps: S101. After heating the purified waste oil to 120° C. according to the mass fraction, slowly add phenyl glycidyl ether, keep the temperature and stir for 1 hour, then slowly add the plasticizer and stir for 30 minutes, then gradually reduce the temperature to 55° C. to obtain a mixed solution; S102. Add epoxidized modified graphene penetrant, 2,6-di-tert-butyl-p-cresol, anti-ultraviolet agent, penetrant and modifier to the mixed solution in order according to their mass proportions. Stir at 100 r / min for 0.5 h, and then cool naturally to room temperature to obtain a weather-resistant penetrating asphalt pavement regeneration agent.

[0035] Example 3 A weather-resistant penetrating asphalt pavement regeneration agent, comprising the following raw materials, calculated by weight: 73 parts of pure waste oil, 5 parts of phenyl glycidyl ether, 3.4 parts of plasticizer, 1.5 parts of epoxidized modified graphene penetrant, 0.7 parts of 2,6-di-tert-butyl-p-cresol, 0.35 parts of anti-ultraviolet agent, 2.3 parts of penetrant, and 9 parts of modifier, wherein the modifier is composed of alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene-acrylate-methacrylate glycidyl ester in a weight ratio of 3:2. :2, the plasticizer is prepared by mixing petroleum sulfonate phenyl ester and epoxy fatty acid butyl ester in a mass ratio of 3:1.5, the penetrant is prepared by mixing fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester in a mass ratio of 1:1.5, and the anti-ultraviolet agent is prepared by mixing 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone in a mass ratio of 2:1.5; the preparation method of the above-mentioned weather-resistant penetrating asphalt pavement regeneration agent comprises the following steps: S101. After heating the purified waste oil to 120° C. according to the mass fraction, slowly add phenyl glycidyl ether, keep warm and stir for 0.7 h, then slowly add plasticizer and stir for 35 min, then gradually reduce the temperature to 55° C. to obtain a mixed solution; S102. Add epoxidized modified graphene penetrant, 2,6-di-tert-butyl-p-cresol, anti-ultraviolet agent, penetrant and modifier to the mixed solution in order according to their mass proportions. Stir at 100 r / min for 0.4 h, and then cool naturally to room temperature to obtain a weather-resistant penetrating asphalt pavement regeneration agent.

[0036] Comparative Example 1 The same as Example 3, except that an equal amount of graphene oxide with a sheet diameter of 0.5 μm-2 μm and a thickness of 0.8 nm-1.5 nm is used instead of the epoxidized modified graphene penetrant.

[0037] Comparative Example 2 The same as Example 3, except that the modifier is alkylphenol polyoxyethylene ether.

[0038] Comparative Example 3 The same as Example 3, except that the modifier is ethylene bisstearamide.

[0039] Comparative Example 4 The same as Example 3, except that the modifier is ethylene-acrylate-glycidyl methacrylate.

[0040] Comparative Example 5 The same as Example 3, except that the plasticizer is phenyl petroleum sulfonate.

[0041] Comparative Example 6 The same as Example 3, except that the plasticizer is epoxy fatty acid butyl ester.

[0042] Comparative Example 7 The same as Example 3, except that the penetrant is fatty alcohol polyoxyethylene ether AEO3.

[0043] Comparative Example 8 The same as Example 3, except that the penetrant is fatty acid polyoxyethylene ester.

[0044] Performance Testing The weather-resistant and penetrating asphalt pavement regeneration agents prepared in Example 1, Example 3, and Comparative Examples 1 to Comparative Examples 8 were sampled and used to prepare regenerated asphalt (using a general conventional preparation method) with waste asphalt pavement materials (with the following properties after deterioration: needle penetration 25 dmm, elongation 7 cm). The regeneration agent was added in an amount of 4%, and the following evaluation tests were performed. The test results are shown in Table 1.

[0045] The needle penetration and ductility are used as recovery evaluation; the softening point is used to evaluate its anti-aging performance and permeability. As the softening point increases, the asphalt becomes harder and more brittle, and its resistance to temperature cracks and fatigue damage decreases, and its permeability also decreases.

[0046] The penetration test follows the current domestic test standard (JTJ052T 0604-93) and uses the following test conditions: 25°C, 100g, 5s. The penetration reflects the consistency of the asphalt pavement material.

[0047] Ductility: Ductility meter is used as the experimental instrument. Asphalt sample is made into 8-shaped standard specimen (minimum cross section 1cm 2 The length (in cm) at break at a specified tensile speed and temperature is called ductility. For reclaimed asphalt pavement, ductility is measured at 15°C. Ductility directly affects the service life of reclaimed asphalt. Poor ductility recovery (excessive hardness) can lead to rapid crack formation and expansion.

[0048] The original asphalt material before service is set as the standard reference sample (needle penetration 70dmm, elongation 120cm), and the recovery degree relative to it is measured.

[0049] Table 1 Performance test At the same time, for the renovated pavement materials, the stability and dynamic stability results of the samples are shown in Table 2.

[0050] Analyzing the data in Table 1 and Table 2, we can see that: 1) The weather-resistant and penetrating asphalt pavement regeneration agents prepared in Examples 1 to 3 can efficiently repair the molecular structure of waste asphalt, have low cost, excellent weather resistance, excellent penetration performance and high stability.

[0051] 2) A comparative analysis of the performance of the weather-resistant penetrating asphalt pavement regeneration agent prepared in combination with Example 3 and Comparative Example 1 shows that graphene forms a penetrant with polar epoxy groups by grafting glycidyl methacrylate onto the graphene surface. These polar epoxy groups can chemically react with asphaltene, weakening the attraction between asphaltene molecules and prompting the asphaltene in the aged asphalt to be redissolved and dispersed in the asphalt colloid system. This helps to destroy the spatial network structure formed by asphaltene agglomeration, thereby improving and accelerating the penetration ability of the regeneration agent. Graphene itself has a large specific surface area and good heat resistance. After epoxidation modification, its compatibility and dispersibility with the regeneration agent are enhanced. The epoxidation-modified graphene penetrant not only improves the penetration ability and heat resistance and aging resistance of the regeneration agent, but also promotes the dispersion and compatibility of aged asphaltene, increasing the stability and environmental friendliness of the regeneration agent.

[0052] 3) A comparative analysis of the performance of the weather-resistant, permeable asphalt pavement regeneration agents prepared in Example 3 and Comparative Examples 2-4 shows that the modifier, composed of a mixture of alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene acrylate-glycidyl methacrylate in a mass ratio of 3:2:2, exhibits excellent dispersing and lubricating properties. They promote the dispersion of aged asphaltene in the oil fraction, reducing the dispersed particle size, thereby improving the fluidity and uniformity of the heated asphalt. Ethylene acrylate-glycidyl methacrylate has a compatibilizing effect. Its epoxy groups react with the terminal hydroxyl and carboxyl groups of the waste oil, increasing compatibility and promoting crosslinking between the aged asphaltene and the waste oil, further blurring the interfacial bonding area. Furthermore, the ester groups in ethylene acrylate-glycidyl methacrylate further enhance the compatibilizing effect of the regeneration agent. The combination of alkylphenol polyoxyethylene ether, ethylene bisstearamide, and ethylene acrylate glycidyl methacrylate produces a synergistic effect. They work together to enhance the penetration and compatibility of the regeneration agent between aged asphaltene and waste oil. This synergistic effect helps to better repair the molecular structure of the waste asphalt, restoring its original properties and thus improving the overall performance and stability of the regenerated asphalt.

[0053] 4) A comparative analysis of the performance of the weather-resistant penetrating asphalt pavement regeneration agent prepared in combination with Example 3 and Comparative Examples 5-6 shows that the plasticizer is prepared by mixing phenyl petroleum sulfonate and butyl epoxy fatty acid ester in a mass ratio of 3:1.5. Phenyl petroleum sulfonate has excellent compatibility and weather resistance. This means that it can maintain stable physical and chemical properties under various conditions, which is very important for the long-term use and performance stability of the asphalt pavement regeneration agent. The softness of butyl epoxy fatty acid ester changes little with temperature. This allows the regenerated asphalt to maintain good physical properties at different temperatures. Especially under high temperature conditions, this stability helps to improve the high-temperature stability of the regenerated asphalt. When phenyl petroleum sulfonate is mixed with butyl epoxy fatty acid ester, they can accelerate the fusion with pure waste oil and aged asphalt. This fusion helps to improve the temperature sensitivity of the regenerated asphalt, thereby improving its overall performance. This plasticizer combination not only improves the stability of the regeneration agent, but also enhances its penetration ability. This is because they can help the regeneration agent better penetrate into the asphalt molecular structure, thereby more effectively repairing and restoring the performance of the asphalt.

[0054] 5) A comparative analysis of the performance of the weather-resistant, penetrating asphalt pavement rejuvenators prepared in Example 3 and Comparative Examples 7 and 8 shows that the penetrant is prepared by mixing fatty alcohol polyoxyethylene ether (AEO3) and fatty acid polyoxyethylene ester in a mass ratio of 1:1-2. The synergistic effect of these two components not only improves penetration and compatibility, but also enhances stability and environmental performance, while also being cost-effective.

[0055] The above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit the present application. Although the above embodiments provide a detailed description of the present application, relevant technical personnel should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the scope of protection of the present application.

Claims

1. A weather-resistant and permeable asphalt pavement regeneration agent, characterized in that: The preparation raw materials include the following in parts by mass: 70-75 parts of pure waste engine oil, 4-6 parts of diluent, 3-4 parts of plasticizer, 1-2 parts of epoxidized modified graphene penetrant, 0.5-0.8 parts of antioxidant, 0.3-0.4 parts of anti-ultraviolet agent, 2-3 parts of penetrant and 8-10 parts of modifier, wherein the modifier is prepared by mixing alkylphenol polyoxyethylene ether, ethylene bisstearamide and ethylene-acrylate-glycidyl methacrylate in a mass ratio of 3:2:1-3.

2. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The preparation method of the epoxidized modified graphene penetrant is as follows: after uniformly mixing 6-8 parts of glycidyl methacrylate, 500 parts of ethanol and 50 parts of water by mass, adding 100 parts of graphene oxide and stirring for 5-7 hours, heating to 75° C., refluxing for 60 minutes, filtering and drying to obtain the epoxidized modified graphene penetrant.

3. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 2, characterized in that: The graphene oxide has a sheet diameter of 0.5 μm-2 μm and a thickness of 0.8 nm-1.5 nm.

4. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The preparation method of the pure waste oil is as follows: filtering the waste oil with a 3.0 μm microporous filter membrane; then heating the waste oil to 130° C.-150° C. for reduced pressure distillation, and continuously keeping the temperature and stirring for 1 h-2 h; cooling the waste oil to room temperature and filtering the waste oil with a 0.6 μm microporous filter membrane to obtain pure waste oil.

5. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The plasticizer is prepared by mixing petroleum sulfonate phenyl ester and epoxy fatty acid butyl ester in a mass ratio of 3:1-2.

6. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The penetrant is prepared by mixing fatty alcohol polyoxyethylene ether AEO3 and fatty acid polyoxyethylene ester in a mass ratio of 1:1-2.

7. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The anti-ultraviolet agent is prepared by mixing 2-hydroxy-4-methoxybenzophenone and 2-hydroxy-4-n-octyloxybenzophenone in a mass ratio of 2:1-2.

8. The weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The antioxidant is 2,6-di-tert-butyl-p-cresol.

9. A weather-resistant and permeable asphalt pavement regeneration agent according to claim 1, characterized in that: The diluent is phenyl glycidyl ether.

10. A method for preparing a weather-resistant and permeable asphalt pavement regeneration agent according to any one of claims 1 to 9, characterized in that: The following steps are involved: S101. After heating the purified waste oil to 120°C according to the mass fraction, slowly add the diluent, keep warm and stir for 0.5h-1h, then slowly add the plasticizer and stir for 30-40min, then gradually reduce the temperature to 55°C to obtain a mixed solution; S102. Add epoxidized modified graphene penetrant, antioxidant, anti-ultraviolet agent, penetrant and modifier to the mixed solution in order according to their mass fractions, stir for 0.3-0.5h at 100r / min, and cool naturally to room temperature to obtain a weather-resistant penetrating asphalt pavement regeneration agent.

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