Self-repairing thermosetting asphalt cement as well as preparation method and application thereof

Abstract

The invention discloses a self-repairing thermosetting asphalt cement and a preparation method and application thereof, and belongs to the technical field of road and bridge construction materials, the self-repairing thermosetting asphalt cement comprises a component A and a component B, the mass ratio of the component A to the component B is 100: (50-120); the component A is prepared from the following components in parts by mass: 100 parts of a polyurethane prepolymer and 70 to 150 parts of a prepolymer diluent; the component B comprises the following components in parts by mass: 20-90 parts of asphalt, 30-80 parts of a curing agent, 0.2-1 part of branched graphene, 10-60 parts of an asphalt diluent and 6-40 parts of a compatilizer. The asphalt cement disclosed by the invention has excellent bonding performance, mechanical strength and toughness, is mainly suitable for paving high-grade pavements such as steel bridge decks, urban viaducts, cement concrete bridge decks, tunnels and expressways, and can be used for repairing cracks and pit slots of asphalt and cement pavements.

Description

Technical Field

[0001] The present invention belongs to the technical field of road and bridge construction materials, and specifically is a self-repairing thermosetting asphalt binder and a preparation method and application thereof. Background Art

[0002] In road construction and materials engineering, the performance of asphalt materials is crucial. The toughness index of asphalt materials is a very important performance index. Toughness refers to the ability of a material to stretch and absorb energy when subjected to external tension. In terms of asphalt materials, this usually involves its behavior when the road surface is subjected to traffic loads. The viscosity of asphalt materials refers to the ability of asphalt materials to resist shear deformation under external forces. It is usually expressed as viscosity, which is the basis for the classification of asphalt grades.

[0003] Asphalt pavement is completely exposed to the natural environment and has been subjected to the effects of vehicle loads and the direct impact of the external natural environment for a long time, which has led to a decline in the road performance of the asphalt pavement. Low-temperature cracking is a common disease of asphalt pavement. After the asphalt pavement is damaged, asphalt materials are used again to fill and compact it. The newly filled asphalt material and the previous asphalt material are difficult to perfectly integrate, resulting in unsatisfactory repair results.

[0004] In this regard, the present invention aims to solve the problems that current road asphalt is prone to cracking, lacks toughness, and is difficult to repair after damage, and provides a self-repairing thermosetting asphalt binder and its preparation method and application. Summary of the invention

[0005] Purpose of the invention: The present invention provides a self-repairing thermosetting asphalt binder and its preparation method and application. The asphalt binder has excellent bonding properties, mechanical strength and toughness, and is mainly suitable for paving high-grade roads such as steel bridge decks, urban viaducts, cement concrete bridge decks, tunnels, and highways, and can be used to repair cracks and potholes on asphalt and cement pavements.

[0006] The present invention innovatively uses branched graphene as a toughening agent to improve the toughness of thermosetting asphalt, while ensuring good compatibility between polyurethane resin and asphalt, and improves the mechanical properties (toughness) of thermosetting asphalt solids. In addition, the polyurethane prepolymer reacts with the curing agent to form a solid with a dynamic covalent network structure, which can achieve reversible self-repair of thermosetting asphalt materials. In addition, the present invention uses a new type of nanomaterial branched graphene to toughen thermosetting asphalt, and introduces dynamic covalent bonds, which provides a new idea for solving the problems of low-temperature brittleness and difficulty in self-repair of thermosetting asphalt.

[0007] Technical solution: A self-repairing thermosetting asphalt binder, comprising component A and component B; the mass ratio of component A to component B is 100:(50-120);

[0008] The component A comprises, by weight, 100 parts of polyurethane prepolymer and 70 to 150 parts of prepolymer diluent;

[0009] The B component comprises, by weight, 20 to 90 parts of asphalt, 30 to 80 parts of curing agent, 0.2 to 1 part of branched graphene, 10 to 60 parts of asphalt diluent, and 6 to 40 parts of compatibilizer.

[0010] Furthermore, the branched graphene is graphene oxide grafted with a long-chain fatty acid containing an epoxy group or a terminal epoxy group hyperbranched polymer;

[0011] The specific preparation method of graphene oxide grafted with terminal epoxy hyperbranched polymer is as follows:

[0012] (1) 100 mg GO (graphene oxide) and 10 mL DMF (N,N-dimethylformamide) were mixed and ultrasonically dispersed for 15 min to obtain a GO solution;

[0013] (2) GO solution and 100 mg EHBP (epoxy-terminated hyperbranched polyester) solution were mixed at a mass ratio of GO:HBP = 1:1, and after ultrasonic dispersion for 15 min, stirred and condensed under reflux at 120 °C for 12 h.

[0014] (3) Filter and wash with anhydrous ethanol, and dry at 80°C for 4 h to obtain GO-EHBP (graphene oxide grafted with end-epoxy hyperbranched polymer).

[0015] The method for preparing the graphene oxide grafted with a long-chain fatty acid containing an epoxy group is the same as the method for preparing the graphene oxide grafted with a terminal epoxy group hyperbranched polymer, except that EHBP is replaced with a long-chain fatty acid containing an epoxy group.

[0016] Furthermore, the polyurethane prepolymer is an isocyanate-terminated polyurethane prepolymer with a relative molecular weight of 500 to 1400 g / mol.

[0017] Furthermore, the polyurethane prepolymer includes a prepolymer of toluene diisocyanate (pre-TDI), a prepolymer of diphenylmethane diisocyanate (pre-MDI), or a mixture of the two.

[0018] Furthermore, the prepolymer diluent is one or a mixture of ethyl acetate, butyl acetate or acetone;

[0019] The curing agent is one or a mixture of N-ethyldiisopropylamine, 4,4'-di-sec-butylaminodiphenylmethane, 2-amino-2-methyl-1-propanol;

[0020] The asphalt is base asphalt or polymer modified asphalt, and the asphalt is one of 70# base asphalt, 90# base asphalt, SBS modified asphalt, SBR modified asphalt, and rubber asphalt;

[0021] The asphalt diluent is one or a mixture of diesel, biodiesel, trichloroethylene, and xylene;

[0022] The compatibilizer is one of soybean oil, epoxidized soybean oil and polymerized fatty acid.

[0023] A method for preparing a self-repairing thermosetting asphalt binder, wherein component A and component B are prepared separately, and when used, component A and component B are mixed and stirred evenly.

[0024] The preparation method of the component A is as follows: after mixing the polyurethane prepolymer and the prepolymer diluent, stirring at a speed of 100 to 500 rpm for 10 to 30 minutes to mix evenly;

[0025] The preparation method of the B component comprises the following steps:

[0026] Step 1), heating the asphalt to 120-135°C to melt;

[0027] Step 2), adding an asphalt diluent to the molten asphalt, stirring at a speed of 200-500 rpm for 0.5-1 h at room temperature to obtain an asphalt solution;

[0028] Step 3), after the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 10-20 minutes;

[0029] Step 4), adding a curing agent, a plasticizer and a compatibilizer into the above asphalt solution, stirring at a rate of 200-500 rpm for 20-60 minutes at room temperature to obtain component B of the self-repairing thermosetting asphalt binder.

[0030] Beneficial effects: (1) The self-repairing thermosetting asphalt binder prepared by the present invention uses branched graphene as a toughening agent to improve the toughness of thermosetting asphalt, while ensuring good compatibility between polyurethane resin and asphalt, and improving the mechanical strength and toughness of the thermosetting asphalt solid. (2) When the self-repairing thermosetting asphalt binder prepared by the present invention is used, component A and component B are mixed, and after mixing, the polyurethane prepolymer reacts with the curing agent to form a solid with a dynamic covalent network structure, which can achieve reversible self-repair of thermosetting asphalt materials. (3) The self-repairing thermosetting asphalt binder prepared by the present invention has a wide range of applications, and can be used for paving high-grade roads such as steel bridge decks, urban viaducts, cement concrete bridge decks, tunnels, highways, etc., and can also be used for repairing cracks and potholes in asphalt and cement pavements. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is described in detail below through embodiments, but the protection scope of the present invention is not limited to the embodiments.

[0032] In the following examples, the prepolymer diluent is ethyl acetate, the curing agent is N-ethyldiisopropylamine, the asphalt is SBS modified asphalt, the asphalt diluent is trichloroethylene, and the compatibilizer is epoxidized soybean oil.

[0033] Preparation of branched graphene: The branched graphene is graphene oxide grafted with a terminal epoxy hyperbranched polymer; the specific preparation method is:

[0034] (1) 100 mg GO and 10 mL DMF were mixed and ultrasonically dispersed for 15 min to obtain a GO solution;

[0035] (2) GO solution and 100 mg EHBP solution were mixed in a mass ratio of GO:HBP = 1:1, and ultrasonically dispersed for 15 min, then stirred and condensed under reflux at 120 °C for 12 h.

[0036] (3) Filter and wash with anhydrous ethanol, and dry at 80°C for 4 h to obtain GO-EHBP.

[0037] The graphene oxide (GO), epoxy-ended hyperbranched polyester (EHBP), and N,N-dimethylformamide (DMF) are all purchased directly from the market. GO-EHBP represents graphene oxide grafted with epoxy-ended hyperbranched polymer.

[0038] Example 1

[0039] Weigh 100 parts of polyurethane prepolymer (pre-TDI) and 70 parts of prepolymer diluent, mix the polyurethane prepolymer and the prepolymer diluent, stir at 200 rpm for 20 minutes, mix evenly, and obtain component A of the self-repairing thermosetting asphalt binder.

[0040] Weigh 20 parts of asphalt, 30 parts of curing agent, 0.2 parts of branched graphene, 10 parts of asphalt diluent, and 6 parts of compatibilizer; heat the asphalt to 130°C to melt. Add the asphalt diluent to the molten asphalt, heat and stir at a speed of 300 rpm at room temperature for 1 hour to obtain an asphalt solution. After the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 20 minutes; add the curing agent, plasticizer, and compatibilizer to the above asphalt solution, stir at a speed of 500 rpm at room temperature for 60 minutes to obtain component B of the self-repairing thermosetting asphalt binder.

[0041] Weigh 100 parts of component A and 50 parts of component B, mix them, and stir them rapidly at 700 rpm for 3 minutes to obtain a self-repairing thermosetting asphalt binder mixture. The construction retention time of the mixture was tested using a Brookfield viscometer, and the viscosity (120°C) after 5 minutes, 10 minutes, and 15 minutes of mixing is shown in Appendix 1. The viscosity at 120°C reached more than 1 Pa·s 15 minutes after mixing, indicating that the workability of the mixture was good.

[0042] The above mixture was poured into a polytetrafluoroethylene mold, first cured at room temperature for 24 hours, then placed in a blast drying oven and cured at 60°C for 48 hours. After cooling, the mold was demolded to obtain a dumbbell-shaped specimen of branched graphene toughened self-repairing epoxy asphalt cured product for mechanical property testing. The mechanical property test conditions were 23±2°C and the tensile rate was 10mm / min. The tensile test results are shown in Appendix 2.

[0043] After the tensile test, the specimens were broken, the fracture surfaces were closely butted, put into an oven and baked at 120°C for 12 hours, and then the tensile test was performed again in the same way. The results are shown in Appendix 3.

[0044] Comparative Example

[0045] As a blank control sample, no branched graphene dispersion was added to compare the effect of the introduction of branched graphene on the performance of the self-repairing thermosetting asphalt binder. Specifically, 100 parts of polyurethane prepolymer (pre-TDI) and 70 parts of prepolymer diluent were weighed, and the polyurethane prepolymer and prepolymer diluent were mixed, stirred at 200 rpm for 20 minutes, and mixed evenly to obtain component A of the self-repairing thermosetting asphalt binder.

[0046] Weigh 20 parts of asphalt, 30 parts of curing agent, 10 parts of asphalt diluent, and 6 parts of compatibilizer, and heat the asphalt to 130°C to melt. Add the asphalt diluent to the molten asphalt, heat and stir at a speed of 300 rpm at room temperature for 1 hour to obtain an asphalt solution. After the asphalt solution is cooled to room temperature, ultrasonic dispersion is performed for 20 minutes; add the curing agent, plasticizer, and compatibilizer to the above asphalt solution, stir at a speed of 500 rpm at room temperature for 60 minutes to obtain component B of the self-repairing thermosetting asphalt binder.

[0047] Weigh 100 parts of component A and 50 parts of component B, mix them, and stir them rapidly at 700 rpm for 3 minutes to obtain a self-repairing thermosetting asphalt binder mixture. The construction retention time of the mixture was tested using a Brookfield viscometer, and the viscosity (120°C) after 5 minutes, 10 minutes, and 15 minutes of mixing is shown in Appendix 1. The viscosity at 120°C reached more than 1 Pa·s 15 minutes after mixing, indicating that the workability of the mixture was good.

[0048] The above mixture was poured into a polytetrafluoroethylene mold, first cured at room temperature for 24 hours, then placed in a blast drying oven and cured at 60°C for 48 hours. After cooling, the mold was demolded to obtain a dumbbell-shaped specimen of branched graphene toughened self-repairing epoxy asphalt cured product for mechanical property testing. The mechanical property test conditions were 23±2°C and the tensile rate was 10mm / min. The tensile test results are shown in Appendix 2.

[0049] After the tensile test, the specimens were broken, the fracture surfaces were closely butted, put into an oven and baked at 120℃ for 12 hours, and then the tensile test was performed again in the same way. The results are shown in Appendix 3.

[0050] Example 2

[0051] Weigh 100 parts of polyurethane prepolymer (pre-TDI) and 100 parts of prepolymer diluent, mix the polyurethane prepolymer and the prepolymer diluent, stir at 200 rpm for 20 minutes, mix evenly, and obtain component A of the self-repairing thermosetting asphalt binder.

[0052] Weigh 40 parts of asphalt, 50 parts of curing agent, 0.5 parts of branched graphene, 20 parts of asphalt diluent, and 15 parts of compatibilizer. The mass ratio of component A to component B is 100:70. Heat the asphalt to 130°C to melt. Add the asphalt diluent to the molten asphalt, heat and stir at a speed of 300 rpm at room temperature for 1 hour to obtain an asphalt solution. After the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 20 minutes; add the curing agent, plasticizer, and compatibilizer to the above asphalt solution, stir at a speed of 500 rpm at room temperature for 60 minutes, and obtain component B of the self-repairing thermosetting asphalt binder.

[0053] Weigh 100 parts of component A and 70 parts of component B, mix them, and stir them rapidly at 700 rpm for 3 minutes to obtain a self-repairing thermosetting asphalt binder mixture. The construction retention time of the mixture was tested using a Brookfield viscometer, and the viscosity (120°C) after 5 minutes, 10 minutes, and 15 minutes of mixing is shown in Appendix 1. The viscosity at 120°C reached more than 1 Pa·s 15 minutes after mixing, indicating that the mixture had good workability.

[0054] The above mixture was poured into a polytetrafluoroethylene mold, first cured at room temperature for 24 hours, then placed in a blast drying oven and cured at 60°C for 48 hours. After cooling, the mold was demolded to obtain a dumbbell-shaped specimen of branched graphene toughened self-repairing epoxy asphalt cured product for mechanical property testing. The mechanical property test conditions were 23±2°C and the tensile rate was 10mm / min. The tensile test results are shown in Appendix 2.

[0055] After the tensile test, the specimens were broken, the fracture surfaces were closely butted, put into an oven and baked at 120℃ for 12 hours, and then the tensile test was performed again in the same way. The results are shown in Appendix 3.

[0056] Example 3

[0057] Weigh 100 parts of polyurethane prepolymer (pre-TDI) and 120 parts of prepolymer diluent, mix the polyurethane prepolymer and the prepolymer diluent, stir at 200 rpm for 20 minutes, mix evenly, and obtain component A of the self-repairing thermosetting asphalt binder.

[0058] Weigh 60 parts of asphalt, 70 parts of curing agent, 0.8 parts of branched graphene, 40 parts of asphalt diluent, and 30 parts of compatibilizer. Heat the asphalt to 130°C to melt. Add the asphalt diluent to the molten asphalt, heat and stir at a speed of 300 rpm at room temperature for 1 hour to obtain an asphalt solution. After the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 20 minutes; add the curing agent, plasticizer, and compatibilizer to the above asphalt solution, stir at a speed of 500 rpm at room temperature for 60 minutes, and obtain the B component of the self-repairing thermosetting asphalt binder.

[0059] Weigh 100 parts of component A and 90 parts of component B, mix them, and stir them rapidly at 700 rpm for 3 minutes to obtain a self-repairing thermosetting asphalt binder mixture. The construction retention time of the mixture was tested using a Brookfield viscometer, and the viscosity (120°C) after 5 minutes, 10 minutes, and 15 minutes of mixing is shown in Appendix 1. The viscosity at 120°C reached more than 1 Pa·s 15 minutes after mixing, indicating that the mixture had good workability.

[0060] The above mixture was poured into a polytetrafluoroethylene mold, first cured at room temperature for 24 hours, then placed in a blast drying oven and cured at 60°C for 48 hours. After cooling, the mold was demolded to obtain a dumbbell-shaped specimen of branched graphene toughened self-repairing epoxy asphalt cured product for mechanical property testing. The mechanical property test conditions were 23±2°C and the tensile rate was 10mm / min. The tensile test results are shown in Appendix 2.

[0061] After the tensile test, the specimens were broken, the fracture surfaces were closely butted, put into an oven and baked at 120℃ for 12 hours, and then the tensile test was performed again in the same way. The results are shown in Appendix 3.

[0062] Example 4

[0063] Weigh 100 parts of polyurethane prepolymer (pre-TDI) and 150 parts of prepolymer diluent, mix the polyurethane prepolymer and the prepolymer diluent, stir at 200 rpm for 20 minutes, mix evenly, and obtain component A of the self-repairing thermosetting asphalt binder.

[0064] Weigh 90 parts of asphalt, 80 parts of curing agent, 1 part of branched graphene, 60 parts of asphalt diluent, and 40 parts of compatibilizer, and heat the asphalt to 130°C to melt. Add the asphalt diluent to the molten asphalt, heat and stir at a speed of 300 rpm at room temperature for 1 hour to obtain an asphalt solution. After the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 20 minutes; add the curing agent, plasticizer, and compatibilizer to the above asphalt solution, stir at a speed of 500 rpm at room temperature for 60 minutes, and obtain the B component of the self-repairing thermosetting asphalt binder.

[0065] Weigh 100 parts of component A and 120 parts of component B, mix them, and stir them rapidly at 700 rpm for 3 minutes to obtain a self-repairing thermosetting asphalt binder mixture. The construction retention time of the mixture was tested using a Brookfield viscometer, and the viscosity (120°C) after 5 minutes, 10 minutes, and 15 minutes of mixing is shown in Appendix 1. The viscosity at 120°C reached more than 1 Pa·s 15 minutes after mixing, indicating that the workability of the mixture was good.

[0066] The above mixture was poured into a polytetrafluoroethylene mold, first cured at room temperature for 24 hours, then placed in a blast drying oven and cured at 60°C for 48 hours. After cooling, the mold was demolded to obtain a dumbbell-shaped specimen of branched graphene toughened self-repairing epoxy asphalt cured product for mechanical property testing. The mechanical property test conditions were 23±2°C and the tensile rate was 10mm / min. The tensile test results are shown in Appendix 2.

[0067] After the tensile test, the specimens were broken, the fracture surfaces were closely butted, put into an oven and baked at 120°C for 12 hours, and then the tensile test was performed again in the same way. The results are shown in Appendix 3.

[0068] Appendix 1. Workability of branched graphene toughened epoxy asphalt mixture

[0069]

[0070] Appendix 2. Mechanical properties of branched graphene toughened epoxy asphalt binder

[0071]

[0072] Appendix 3. Self-healing properties of branched graphene toughened epoxy asphalt binder

[0073]

[0074] Appendix 1 shows the workability of branched graphene toughened epoxy asphalt mixtures. The results show that the introduction of branched graphene effectively reduces the viscosity growth rate of the binder, especially within the first 15 minutes of construction operation, the material viscosity is low and maintains good workability. This means that the material has a longer operating time in the actual construction process, is easy to pave and apply, and is especially suitable for large-area, high-demand pavement paving.

[0075] Appendix 2 shows the mechanical properties of branched graphene toughened epoxy asphalt binder cured material. The results show that branched graphene significantly improves the toughness of the material, which is reflected in the significant increase in elongation at break. Although the tensile strength is slightly reduced, the increase in toughness makes the material more resistant to cracking and ductile when facing high loads and temperature changes. This property is crucial for high-grade pavements such as steel bridge decks and highways, which can reduce the occurrence of pavement cracks and damage.

[0076] Appendix 3 shows the self-repairing properties of branched graphene toughened epoxy asphalt binder solidified material. The results show that the branched graphene toughened asphalt material has excellent self-repairing ability. After the specimen is broken and repaired by heating, the tensile strength and elongation at break can be restored to more than 70% of the original value, and some embodiments (such as the tensile strength of Example 4) can even reach more than 85%. This shows that the material can achieve self-repair through simple heat treatment after being damaged, which significantly extends the service life of the material, reduces the maintenance frequency, and saves maintenance costs.

[0077] In summary, the scheme described in Example 4 has appropriate workability, tensile strength, elongation at break and self-healing performance, and is a preferred scheme. The application of branched graphene not only improves the construction performance and toughness of the material, but also achieves efficient self-healing function by introducing a dynamic covalent network structure. This innovative material provides a more reliable and durable solution for road construction, especially high-load and high-stress pavements.

[0078] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and details may be made without departing from the spirit and scope of the present invention.

Claims

1. A self-repairing thermosetting asphalt binder, characterized in that: It includes component A and component B; The mass ratio of component A to component B is 100:(50-120); The component A comprises, by weight, 100 parts of polyurethane prepolymer and 70 to 150 parts of prepolymer diluent; The B component comprises, by weight, 20 to 90 parts of asphalt, 30 to 80 parts of curing agent, 0.2 to 1 part of branched graphene, 10 to 60 parts of asphalt diluent, and 6 to 40 parts of compatibilizer.

2. The self-repairing thermosetting asphalt binder according to claim 1, characterized in that: The branched graphene is graphene oxide grafted with a long-chain fatty acid containing an epoxy group or a terminal epoxy group hyperbranched polymer.

3. The self-repairing thermosetting asphalt binder according to claim 1, characterized in that: The polyurethane prepolymer is an isocyanate-terminated polyurethane prepolymer with a relative molecular weight of 500 to 1400 g / mol.

4. The self-repairing thermosetting asphalt binder according to claim 2, characterized in that: The polyurethane prepolymer is a prepolymer of toluene diisocyanate, a prepolymer of diphenylmethane diisocyanate or a mixture of the two.

5. The self-repairing thermosetting asphalt binder according to claim 1, characterized in that: The prepolymer diluent is one or a mixture of ethyl acetate, butyl acetate or acetone; The curing agent is one or a mixture of N-ethyldiisopropylamine, 4,4'-di-sec-butylaminodiphenylmethane, 2-amino-2-methyl-1-propanol; The asphalt is base asphalt or polymer modified asphalt; The asphalt diluent is one or a mixture of diesel, biodiesel, trichloroethylene, and xylene; The compatibilizer is one of soybean oil, epoxidized soybean oil and polymerized fatty acid.

6. The self-repairing thermosetting asphalt binder according to claim 5, characterized in that: The asphalt is one of 70# base asphalt, 90# base asphalt, SBS modified asphalt, SBR modified asphalt and rubber asphalt.

7. The method for preparing the self-repairing thermosetting asphalt binder according to any one of claims 1 to 6, characterized in that: The preparation method of the component A is as follows: after mixing the polyurethane prepolymer and the prepolymer diluent, stirring at a speed of 100 to 500 rpm for 10 to 30 minutes to mix evenly; The preparation method of the B component comprises the following steps: Step 1), heating the asphalt to 120-135°C to melt; Step 2), adding an asphalt diluent to the molten asphalt, stirring at a speed of 200-500 rpm for 0.5-1 h at room temperature to obtain an asphalt solution; Step 3), after the asphalt solution is cooled to room temperature, the branched graphene is added to the asphalt solution and ultrasonically dispersed for 10-20 minutes; Step 4), adding a curing agent, a plasticizer and a compatibilizer into the above asphalt solution, stirring at a rate of 200-500 rpm for 20-60 minutes at room temperature to obtain component B of the self-repairing thermosetting asphalt binder.

8. The use of the self-repairing thermosetting asphalt binder according to any one of claims 1 to 6, characterized in that: When using, mix component A with component B and stir evenly.

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