Modified asphalt material as well as preparation method and application thereof

Abstract

The invention discloses a modified asphalt material and a preparation method and application thereof, the Marshall stability and the flow value of a modified asphalt mixture prepared from the modified asphalt material respectively exceed 20 kN and 44 (0.1 mm) after curing, the low-temperature bending strain value of the modified asphalt mixture exceeds 4100 mu epsilon after curing, the dynamic stability (high-temperature stability index) of the modified asphalt mixture exceeds 17000 times / mm after curing, and the dynamic stability (high-temperature stability index) of the modified asphalt mixture exceeds 8000 times / mm after curing. The strength at low temperature and normal temperature is increased quickly, the deformation characteristic and impact toughness are excellent, and the purpose of opening traffic quickly can be achieved.

Description

Technical Field

[0001] This application belongs to the technical field of building materials, and specifically relates to a modified asphalt material, its preparation method and application. Background Art

[0003] With the transformation of China's highway field from the construction stage to the stage of equal emphasis on construction and maintenance, the preventive maintenance and corrective repair of asphalt pavements or cement concrete pavements have gradually become the main tasks in the highway field. Especially in the field of preventive maintenance, for the thin layer overlay or ultra-thin layer overlay on asphalt pavements or cement pavements, high requirements are placed on the flexibility, high-temperature stability, and fatigue resistance of asphalt mixtures. Currently, the commonly used micro-surfacing technology based on emulsified asphalt, cold mix thin layer technology, and hot mix high-viscosity and high-toughness modified asphalt mixtures still have the characteristics of relatively poor anti-reflection cracking, weak high-temperature stability, and weak fatigue resistance.

[0004] At the same time, the construction period of the traditional jointed bridge expansion joint repair technology for closing lanes is mostly more than 2 days, which is extremely likely to cause traffic congestion and has relatively large construction safety hazards. There is an urgent need for durable rapid repair technology. For the bridge expansion joints on large traffic volume channels with a high proportion of heavy traffic, the use effect of seamless expansion joint materials with hot melt adhesive, TST, polyurethane, etc. as gelling materials is generally average. Therefore, there are currently no effective technical measures for the repair of expansion joint structures for rapid repair requirements. Especially how to ensure that the paving lower layer of the seamless expansion joint structure has characteristics such as adapting to large deformations, impact toughness, and compression characteristics to meet the waterproofing of the expansion joint structure and the stretching and compression behaviors of the expansion joint structure caused by temperature periodic changes. Therefore, excellent large deformability, high toughness, and compression resistance are the core functions required for the paving lower layer of the expansion joint structure.

[0005] Currently, rutting diseases are widespread in the asphalt pavements of plane intersections on ordinary national and provincial trunk roads in China, seriously endangering driving comfort and safety. There are problems such as short lifespan of the asphalt pavements at intersections paved with commonly used SBS modified asphalt mixtures. Semi-flexible pavements still have disadvantages such as easy cracking, complex construction processes, and long curing times. For uneven settlement sections of the subgrade and sections with cracks in the asphalt surface layer, low-temperature crack resistance, flexibility, high-temperature stability, fatigue resistance, etc. are still important performance requirements for the asphalt pavements at intersections. Summary of the Invention

[0006] 1. Problems to be Solved

[0007] Based on the fact that existing modified asphalt materials are difficult to meet the requirements of large deformability, high toughness, and compression resistance, the present invention provides a preparation method and application of a modified asphalt and its mixture.

[0008] 2. Technical Solutions

[0009] To solve the above problems, the technical solution adopted in this application is as follows:

[0010] In a first aspect, this application provides a modified asphalt material, which comprises the following raw material components (by mass):

[0011] Component A: 60 - 90 parts of epoxy resin, 5 - 25 parts of hydrogenated bisphenol A epoxy resin, 1 - 5 parts of polyurethane-modified epoxy resin, 5 - 20 parts of epoxy resin active diluent, 1 - 5 parts of polyetheramine curing agent;

[0012] Component B: 3 - 15 parts of asphalt and asphalt modifier B; wherein, asphalt modifier B comprises: 5 - 10 parts of epoxy resin, 1 - 3 parts of epoxy resin active diluent, 1 - 5 parts of dimer acid, 30 - 80 parts of polyetheramine curing agent, 1 - 4 parts of polyamide curing agent;

[0013] Component C: 15 - 100 parts of asphalt and asphalt modifier C; wherein, asphalt modifier C comprises: 2 - 8 parts of bisphenol F type epoxy resin, 1 - 5 parts of styrene, 9 - 15 parts of polyamide curing agent, 10 - 15 parts of polyetheramine curing agent, 30 - 60 parts of amide group curing agent, 1 - 4 parts of curing accelerator.

[0014] Furthermore, for the above-mentioned modified asphalt material, the mass ratio of Component A, Component B, and Component C is (24 - 30):(23 - 26):(31 - 33), where:

[0015] The function / purpose of adding Component A is to ensure that after reacting with Component B and Component C, the resulting modified asphalt material has high toughness and impact resistance, excellent high-temperature stability, low-temperature anti-cracking characteristics, and at the same time significantly improves the weather resistance, i.e., anti-aging performance, of the resulting modified asphalt material;

[0016] The function / purpose of adding Component B is to ensure that the resulting modified asphalt material has good impact toughness and elastic deformation ability, and the addition of dimer acid is to improve the elasticity and deformability of the modified asphalt cured product;

[0017] The function / purpose of adding Component C is to ensure that the mixture of Component A with Component B and Component C makes the resulting modified asphalt material have good deformability, high toughness and impact resistance, and low-temperature anti-cracking characteristics.

[0018] Furthermore, for the above-mentioned modified asphalt material, the mass ratio of Component A, Component B, and Component C is 27:23:33.

[0019] Furthermore, for the above-mentioned modified asphalt material, the mass ratio of Component A, Component B, and Component C is 28:25:33.

[0020] Further, for the above-mentioned modified asphalt material, the mass ratio of component A, component B, and component C is 30:23:31.

[0021] Further, for the above-mentioned modified asphalt material, the mass ratio of component A, component B, and component C is 25:25:30.

[0022] Further, for the above-mentioned modified asphalt material, the mass ratio of component A, component B, and component C is 24:26:31.

[0023] Further, in the above-mentioned component A, the epoxy resin includes any one or a mixture of more than one of bisphenol A epoxy resin, bisphenol F epoxy resin, dimer acid modified epoxy resin, and high-toughness modified epoxy resin.

[0024] Further, in the above-mentioned component A, the epoxy resin includes bisphenol A epoxy resin and / or bisphenol F epoxy resin.

[0025] Further, in the above-mentioned component A, the epoxy resin active diluent includes any one or a mixture of more than one of mono-epoxy glycidyl ether, bis-epoxy glycidyl ether, tris-epoxy glycidyl ether, and polyether polyol.

[0026] Further, the above-mentioned mono-epoxy glycidyl ether includes: C 12-14 any one or a mixture of more than one of aliphatic glycidyl ether, neodecanoic acid glycidyl ether, and cashew oil modified monoglycidyl ether.

[0027] Further, the above-mentioned bis-epoxy glycidyl ether includes any one or a mixture of more than one of ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, etc.

[0028] Further, the above-mentioned tris-epoxy glycidyl ether includes trimethylolpropane glycidyl ether and / or castor oil polyglycidyl ether.

[0029] Further, the above-mentioned polyether polyol includes any one or a mixture of more than one of Dow polyether polyol VORANOL 220-260, VORANOL2110TB, VORANOL 2120, VORANOL CP1055, VORANOL CP450, PO3G H500, and NX 9203.

[0030] Further, in the above-mentioned component B, the epoxy resin includes any one or a mixture of more than one of bisphenol A epoxy resin, bisphenol F epoxy resin, dimer acid modified epoxy resin, and high-toughness modified epoxy resin.

[0031] Further, in the above component B, the epoxy resin active diluent includes any one or a mixture of more than one of: monoglycidyl ether, diglycidyl ether, triglycidyl ether, and polyether polyol.

[0032] Further, the above monoglycidyl ether includes any one or a mixture of more than one of: C 12-14 aliphatic glycidyl ether, glycidyl neodecanoate, and cashew nut oil modified monoglycidyl ether.

[0033] Further, the above diglycidyl ether includes any one or a mixture of more than one of: ethylene glycol diglycidyl ether, 1,6 - hexanediol diglycidyl ether, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,4 - butanediol diglycidyl ether, etc.

[0034] Further, the above triglycidyl ether includes trimethylolpropane triglycidyl ether and / or castor oil polyglycidyl ether.

[0035] Further, the above polyether polyol includes any one or a mixture of more than one of: Dow polyether polyol VORANOL 220 - 260, VORANOL2110TB, VORANOL 2120, VORANOL CP1055, VORANOL CP450, PO3G H500, NX 9203.

[0036] Further, in the above component C, the curing accelerator includes one or a mixture of more than one of: amine accelerators and imidazole and its salt accelerators.

[0037] Further, for the above asphalt, there is no particular limitation on its type, and it can be A - grade road asphalt available on the existing market, including any one or a mixture of two or more of: 70# petroleum asphalt, 90# petroleum asphalt, 110# petroleum asphalt.

[0038] In a second aspect, the present application provides a preparation method of the modified asphalt material described in the first aspect of the present application, and this preparation method includes the steps:

[0039] (1) Perform a first heat mixing treatment on epoxy resin, hydrogenated bisphenol A epoxy resin, polyurethane - modified epoxy resin, epoxy resin active diluent, and polyetheramine curing agent to obtain component A;

[0040] (2) Perform a second heat mixing treatment on epoxy resin, epoxy resin active diluent, dimer acid, polyetheramine curing agent, and polyamide curing agent, and then perform a third heat mixing treatment with the asphalt that has undergone the first preheating treatment to obtain Component B; wherein: the temperature of the first preheating treatment is higher than the temperature of the second heat mixing treatment;

[0041] (3) Perform a fourth heat mixing treatment on bisphenol F type epoxy resin, styrene, polyamide curing agent, polyetheramine curing agent, amide group curing agent, and curing accelerator, and then perform a fifth heat mixing treatment with the asphalt that has undergone the second preheating treatment to obtain Component C; wherein: the temperature of the second preheating treatment is higher than the temperature of the fourth heat mixing treatment;

[0042] (4) Perform a sixth heat mixing treatment on Component A, Component B, and Component C to obtain a modified asphalt material, wherein: the temperature of the sixth heat mixing treatment is lower than the temperature of any one of the heat mixing treatments in the above steps (1) to (3);

[0043] The purpose of performing the pretreatment on Components A, B, and C respectively in the above steps (1) to (3) and then performing the mixing in step (4) is to ensure that the modified asphalt material of the present invention simultaneously has the material characteristics of good deformability, high toughness and impact resistance, excellent high-temperature stability, and low-temperature crack resistance; that is, through the design of the functions of each component, epoxy resin, curing agent, and their modified materials are generated by the self-chemical reaction of the above Components A, B, and C. After the products of the above components react, they are mixed and reacted in a certain proportion to achieve the functions of high toughness and impact resistance and low-temperature crack resistance; after the pretreatment of Components A, B, and C, a modified asphalt material is generated by mixing in a certain proportion. It should be noted that when there is no pretreatment process for the above Components A, B, and C, directly performing a hot stirring treatment to obtain a modified asphalt material cannot ensure that the modified asphalt material of the present invention simultaneously has the characteristics of good deformability, high toughness and impact resistance, excellent high-temperature stability, and low-temperature crack resistance, and it is also difficult to control the reaction speed (construction operability) of the modified asphalt material of the present invention; on this basis, by adding a certain amount of polyester fiber, polypropylene fiber, etc. to the modified asphalt mixture and designing it with the above modified asphalt components, the high toughness and impact resistance and low-temperature crack resistance characteristics of the modified asphalt and its mixture can be well achieved.

[0044] Further, in the above step (1), the conditions of the first heat mixing treatment include: temperature 45 - 60°C, stirring speed 100 - 200 rpm, treatment time 2 - 20 min.

[0045] Further, in the above step (1), the conditions of the first heat mixing treatment include: temperature 45 - 58°C, stirring speed 105 - 200 rpm, treatment time 2 - 18 min.

[0046] Further, in the above step (1), the first heat mixing treatment conditions include: the temperature is 47 - 58°C, the stirring speed is 115 - 190 rpm, and the treatment time is 3 - 18 min.

[0047] Further, in the above step (1), the first heat mixing treatment conditions include: the temperature is 47 - 55°C, the stirring speed is 115 - 180 rpm, and the treatment time is 3 - 15 min.

[0048] Further, in the above step (2), the second heat mixing treatment conditions include: the temperature is 50 - 80°C, the stirring speed is 50 - 100 rpm, and the treatment time is 2 - 30 min.

[0049] Further, in the above step (2), the second heat mixing treatment conditions include: the temperature is 50 - 77°C, the stirring speed is 60 - 100 rpm, and the treatment time is 2 - 25 min.

[0050] Further, in the above step (2), the second heat mixing treatment conditions include: the temperature is 55 - 76°C, the stirring speed is 62 - 100 rpm, and the treatment time is 2 - 20 min.

[0051] Further, in the above step (2), the second heat mixing treatment conditions include: the temperature is 55 - 75°C, the stirring speed is 70 - 100 rpm, and the treatment time is 3 - 15 min.

[0052] Further, in the above step (2), the first preheating treatment temperature is 115 - 142°C.

[0053] Further, in the above step (2), the first preheating treatment temperature is 125 - 135°C.

[0054] Further, in the above step (2), the third heat mixing treatment conditions include: the temperature is 60 - 90°C, the stirring speed is 50 - 100 rpm, and the treatment time is 0.5 - 2 h.

[0055] Further, in the above step (2), the third heat mixing treatment conditions include: the temperature is 60 - 88°C, the stirring speed is 55 - 100 rpm, and the treatment time is 0.5 - 1.8 h.

[0056] Further, in the above step (2), the third heat mixing treatment conditions include: the temperature is 60 - 85°C, the stirring speed is 60 - 100 rpm, and the treatment time is 0.5 - 1.5 h.

[0057] Further, in the above step (2), the third heat mixing treatment conditions include: the temperature is 60 - 80°C, the stirring speed is 65 - 100 rpm, and the treatment time is 0.5 - 1.0 h.

[0058] Further, in the above step (3), the conditions for the fourth heat mixing treatment include: a temperature of 45 to 70°C, a stirring speed of 50 to 100 rpm, and a treatment time of 2 to 30 min.

[0059] Further, in the above step (3), the conditions for the fourth heat mixing treatment include: a temperature of 45 to 67°C, a stirring speed of 60 to 100 rpm, and a treatment time of 2 to 26 min.

[0060] Further, in the above step (3), the conditions for the fourth heat mixing treatment include: a temperature of 45 to 63°C, a stirring speed of 62 to 100 rpm, and a treatment time of 2 to 20 min.

[0061] Further, in the above step (3), the conditions for the fourth heat mixing treatment include: a temperature of 45 to 60°C, a stirring speed of 70 to 100 rpm, and a treatment time of 2 to 11 min.

[0062] Specifically, in the above step (3), the temperature of the second preheating treatment is 117 to 142°C.

[0063] Further, in the above step (3), the temperature of the second preheating treatment is 125 to 135°C.

[0064] Specifically, in the above step (3), the conditions for the fifth heat mixing treatment include: a temperature of 50 to 70°C, a stirring speed of 50 to 200 rpm, and a treatment time of 0.5 to 2 h.

[0065] Further, in the above step (3), the conditions for the fifth heat mixing treatment include: a temperature of 50 to 67°C, a stirring speed of 55 to 160 rpm, and a treatment time of 0.5 to 1.8 h.

[0066] Further, in the above step (3), the conditions for the fifth heat mixing treatment include: a temperature of 55 to 65°C, a stirring speed of 60 to 150 rpm, and a treatment time of 0.5 to 1.5 h.

[0067] Further, in the above step (3), the conditions for the fifth heat mixing treatment include: a temperature of 55 to 62°C, a stirring speed of 60 to 100 rpm, and a treatment time of 0.5 to 1.0 h.

[0068] Further, in the above step (4), the conditions for the sixth heat mixing treatment include: a temperature of 0 to 50°C, a stirring speed of 5 to 80 rpm, and a treatment time of 30 to 60 s.

[0069] Further, in the above step (4), the conditions for the sixth heat mixing treatment include: a temperature of 0 to 50°C, a stirring speed of 5 to 65 rpm, and a treatment time of 3 to 60 s.

[0070] Further, in the above step (4), the sixth heat mixing treatment includes the conditions: the temperature is 5 - 45°C, the stirring speed is 10 - 65 rpm, and the treatment time is 10 - 60 s.

[0071] Further, in the above step (4), the sixth heat mixing treatment includes the conditions: the temperature is 10 - 45°C, the stirring speed is 15 - 60 rpm, and the treatment time is 30 - 60 s.

[0072] In a third aspect, the present application provides a modified asphalt mixture including the modified asphalt material described in the first aspect of the present invention. The modified asphalt mixture further includes aggregates, mineral powder, and polypropylene fibers or polyester fibers; wherein: the main purpose of adding aggregates is to enable the asphalt mixture to withstand the cyclic action of vehicle loads, reduce costs, and reduce the usage amount of the modified asphalt material; based on this, it is required that the aggregates and mineral powder should meet the requirements of the synthetic gradation of asphalt mixtures in different asphalt pavement layers in the "Technical Specification for Construction of Highway Asphalt Pavements" (JTG F40 2017); usually, basalt, diabase, and diorite with high wear resistance and high crushing value are used for the upper asphalt layer, and limestone and other aggregates are mainly used for the middle and lower asphalt layers.

[0073] Further, in the above modified asphalt mixture, the mass ratio of the modified asphalt material to the total mass of the aggregates and mineral powder is 3.8% - 8.0%.

[0074] Further, the mass ratio of the above modified asphalt material to the total mass of the aggregates and mineral powder is 4.1% - 7.5%.

[0075] Further, the mass ratio of the above modified asphalt material to the total mass of the aggregates and mineral powder is 4.3% - 7.5%.

[0076] Further, the mass ratio of the above modified asphalt material to the total mass of the aggregates and mineral powder is 4.3% - 7.1%.

[0077] Further, the above aggregates include coarse aggregates and fine aggregates; the determination of the added mass ratio of the coarse aggregates, fine aggregates, and mineral powder is designed by the Marshall design method to obtain the corresponding added mass ratio of the coarse aggregates, fine aggregates, and mineral powder, and the optimum asphalt content is determined.

[0078] Further, the mass ratio of the above polypropylene fibers or polyester fibers to the aggregates is 0.15% - 0.35%.

[0079] Further, the mass ratio of the above polypropylene fibers or polyester fibers to the aggregates is 0.2% - 0.35%.

[0080] Further, the mass ratio of the above polypropylene fibers or polyester fibers to the aggregates is 0.2% - 0.3%.

[0081] Fourthly, the present application provides a preparation method of the modified asphalt mixture described in the third aspect of the present application. The preparation method includes the following steps:

[0082] S1, providing the modified asphalt material provided in the first aspect of the present application, or the modified asphalt material prepared by the preparation method provided in the second aspect of the present application; providing aggregate, mineral powder, polypropylene fiber or polyester fiber;

[0083] S2, mixing the above-mentioned modified asphalt material, aggregate, mineral powder, polypropylene fiber or polyester fiber; the conditions of the mixing treatment include: temperature 0 - 50°C, rotation speed 10 - 80 rpm, time 30 - 90 s.

[0084] Fifthly, the present application provides an application of the modified asphalt mixture provided in the third aspect of the present application, or the modified asphalt mixture prepared by the preparation method provided in the fourth aspect of the present application in pavement preventive maintenance or corrective repair.

[0085] Further, the above application includes: performing cold paving construction, including the steps of:

[0086] M1, providing the above-mentioned modified asphalt mixture;

[0087] M2, paving and forming the above-mentioned modified asphalt mixture;

[0088] M3, performing curing treatment after forming. The curing treatment can be ambient temperature curing or curing treatment methods such as auxiliary heating with a hot air blower, a highway doctor heating vehicle, an infrared lamp, etc. to accelerate the forming of the modified asphalt mixture; among them, the climate temperature is 0 - 55°C, and the time is 1 - 6 h.

[0089] 3. Beneficial effects

[0090] Compared with the prior art, the beneficial effects of the present application are as follows:

[0091] (1) For the modified asphalt material, its preparation method and application provided in the present application, and the modified asphalt mixture prepared from the modified asphalt material, its Marshall stability and flow value both exceed 25 kN and 44 (0.1 mm) respectively after curing, which are significantly superior to the commonly used modified asphalt mixtures. Therefore, the modified asphalt mixture provided in the present application has good flexibility and impact resistance characteristics.

[0092] (2) For the modified asphalt material, its preparation method and application provided in the present application, and the modified asphalt mixture prepared from the modified asphalt material, its low-temperature bending strain value exceeds 4100 με after curing. Therefore, the modified asphalt mixture provided in the present application has good low-temperature crack resistance.

[0093] (3) The modified asphalt material provided by this application, its preparation method and application, the dynamic stability (high-temperature stability index) of the modified asphalt mixture prepared from the modified asphalt material exceeds 17,000 times / mm after curing, and it has obvious thermosetting properties, that is, no obvious rutting diseases will occur at high temperatures; therefore, the high-temperature stability of the modified asphalt mixture provided by the present invention is good, that is, it can withstand the long-term action of large tire pressures without rutting diseases. Detailed implementation manners

[0094] The following further describes this application in combination with specific embodiments.

[0095] It should be noted that the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the sake of clarity in narration and are not used to limit the scope that can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that can be implemented in this application.

[0096] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0097] For those conditions not specified in the examples, they are carried out according to conventional conditions or the conditions recommended by the manufacturer. For reagents or instruments whose manufacturers are not specified, they are all conventional products that can be obtained through commercial purchase.

[0098] As used herein, the term "about" is used to provide flexibility and imprecision associated with a given term, measurement, or value. Those skilled in the art can easily determine the degree of flexibility of a specific variable.

[0099] As used herein, the term "at least one of..." is intended to be synonymous with "one or more of...". For example, "at least one of A, B, and C" clearly includes only A, only B, only C, and their respective combinations.

[0100] Concentrations, amounts, and other numerical data may be presented herein in a range format. It should be understood that such range formats are used merely for convenience and brevity and should be interpreted flexibly as including not only the values explicitly recited as the limits of the range but also all individual values or sub-ranges subsumed within the stated range as if each value and sub-range were explicitly recited. For example, a numerical range of about 1 to about 4.5 should be interpreted as including not only the explicitly recited limits of 1 to about 4.5 but also the individual numbers (such as 2, 3, 4) and sub-ranges (such as 1 to 3, 2 to 4, etc.). The same principle applies to ranges that recite only one numerical value, such as "less than about 4.5", which should be interpreted as including all of the above values and ranges. In addition, this interpretation should apply regardless of the breadth of the range or feature described.

[0101] The testing instruments (or models) used in the following specific examples:

[0102] Marshall stability (kN) testing: Marshall stability tester;

[0103] Residual stability (%) testing: Marshall stability tester;

[0104] Flow value (0.1 mm) testing: Marshall stability tester;

[0105] Low-temperature bending strain testing: MTS-810 (materials testing system).

[0106] The present invention will be further described below in conjunction with specific examples, but the examples do not limit the present invention in any form. Unless otherwise specified, the reagents, methods, and equipment used in the present invention are conventional reagents, methods, and equipment in the technical field. The essential features and remarkable effects of the present invention can be reflected from the following examples. The described examples are some examples of the present invention, rather than all examples. Therefore, they do not limit the present invention in any way. Those skilled in the art make some non-essential improvements and adjustments based on the content of the present invention, which all fall within the protection scope of the present invention.

[0107] Example 1

[0108] This example provides a modified asphalt material and its preparation method, a modified asphalt mixture containing the modified asphalt material and its preparation method and application.

[0109] (1) Modified asphalt material and its preparation

[0110] 1) Weigh 85 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer: Hexion Inc., USA, model: EPON 862), 8 parts by mass of hydrogenated bisphenol A epoxy resin (manufacturer: Anhui Xinyuan Chemical Co., Ltd., brand: xy518), 3 parts by mass of polyurethane-modified epoxy resin (manufacturer: Adeka Corporation, Japan, brand: EPU-133L), 8 parts by mass of epoxy resin active diluent 1,6-hexanediol diglycidyl ether (manufacturer: Huntsman Corporation, USA, brand: DY-H), 5 parts by mass of Dow polyether polyol VORANOL (220-260), and 4 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, brand: D 230). Heat the mixture to 60°C and stir at a speed of 120 rpm for 20 min to fully mix and react to obtain Component A;

[0111] 2) Weigh 10 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer: Nan Ya Plastics Corporation, Taiwan, China, model: NPEF 170), 2 parts by mass of epoxy resin active diluent polypropylene glycol diglycidyl ether (manufacturer: Huntsman Corporation, USA, brand: DY~F), 5 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials Co., Ltd., model: HY 13), 75 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, brand: D230), and 3 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, product number: ANCAMIDE 350A). Heat the mixture to 60°C and stir at a speed of 65 rpm for 30 min. Then add 10 parts by mass of asphalt that has been heated to 135°C and stir at a speed of 80 rpm for 1 h in a temperature atmosphere set at 60°C to fully mix and react to obtain Component B;

[0112] 3) Weigh 5 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer; Nan Ya Plastics Corporation, Taiwan, China, model: NPEF 170), 2 parts by mass of styrene, 15 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, product number: ANCAMIDE 350A), 10 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, brand: D 2000), 55 parts by mass of amide-based curing agent (manufacturer: Air Products and Chemicals, Inc., USA, product number: ANCAMIDE 150), and 2 parts by mass of curing accelerator (manufacturer: Huntsman Corporation, USA, product number: Accelerator 960~1). Heat the mixture to 50°C and stir at a speed of 65 rpm for 26 min. Then add 100 parts by mass of asphalt that has been heated to 135°C and stir at a speed of 80 rpm for 1 h in a temperature atmosphere set at 55°C to fully mix and react to obtain Component C.

[0113] 4) Mix Component A, Component B, and Component C in a mass ratio of 27:23:33 and stir at a speed of 50 rpm for 60 s at 40°C to obtain the modified asphalt material.

[0114] (2) Modified Asphalt Mixture and Its Preparation

[0115] At a temperature of 40°C, 6.8 parts by mass of the modified asphalt material obtained above is mixed with 93.2 parts by mass of coarse and fine aggregates and mineral powder with a grading curve within the SMA-13 grading range that complies with the "Technical Specification for Construction of Highway Asphalt Pavements" (JTG F40-2017), and polypropylene fibers accounting for 0.3% of the total mass of the aggregates are mixed (rotation speed 40 rpm, time 60 s) to obtain a modified asphalt mixture.

[0116] (3) Application of the modified asphalt mixture

[0117] Cold paving construction is carried out using the asphalt mixture described above: at a temperature of 40°C, the asphalt mixture is paved and formed; after forming, curing treatment is carried out for 4 h.

[0118] Example 2

[0119] This example provides a modified asphalt material and its preparation method, a modified asphalt mixture containing this modified asphalt material and its preparation method and application.

[0120] (1) Modified asphalt material and its preparation

[0121] 1) 82 parts by mass of bisphenol F type epoxy resin (manufacturer: Guodu Chemical Industry, model: YDF 170), 4 parts by mass of bisphenol A type epoxy resin (manufacturer: Huntsman USA, model: GY 250), 8 parts by mass of hydrogenated bisphenol A type epoxy resin (manufacturer: Anhui Xinyuan, model: xy518), 3 parts by mass of polyurethane modified epoxy resin (manufacturer: Adeka Japan, model: EPU-133L), 6 parts by mass of the epoxy resin active diluent 1,6-hexanediol diglycidyl ether (Huntsman USA, grade; DY-H), and 5 parts by mass of Dow polyether polyol (VORANOL 2120), 3 parts by mass of polyetheramine curing agent (manufacturer: BASF Germany, model: D 230) are heated to 58°C and stirred at a rotation speed of 150 rpm for 18 min for full mixing and reaction to obtain component A;

[0122] (2) Mix 6 parts by mass of a low-viscosity bisphenol F epoxy resin (manufacturer: Hexion, USA; model: EPON 862), 3 parts by mass of the epoxy resin diluent cyclohexanedimethanol diglycidyl ether (manufacturer: Huntsman, USA; grade: DY-C), 4 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials, model: HY 13), 70 parts by mass of a polyetheramine curing agent (manufacturer: BASF, Germany; model: D 230), and 2 parts by mass of a polyamide curing agent (manufacturer: Air Products and Chemicals, USA; model: ANCAMIDE 350A). Heat to 60 °C and stir at 65 rpm for 25 min. Then add 9 parts by mass of asphalt that has been heated to 130 °C and stir at 85 rpm for 1.5 h in a temperature atmosphere set at 65 °C to obtain Component B through sufficient mixing and reaction.

[0123] (3) Mix 7 parts by mass of bisphenol F epoxy resin (manufacturer: Hexion, USA; model: EPON 862), 2 parts by mass of styrene, 10 parts by mass of a polyamide curing agent (manufacturer: Air Products and Chemicals, USA; model: ANCAMIDE 350A), 10 parts by mass of a polyetheramine curing agent (manufacturer: BASF, Germany; model: D 230), 60 parts by mass of an amide-based curing agent (manufacturer: Air Products and Chemicals, USA; model: ANCAMIDE 501), and 3 parts by mass of a curing accelerator (manufacturer: Huntsman, USA; model: Accelerator 960-1). Heat each component to 46 °C and stir at 80 rpm for 0.5 h. Then add 90 parts by mass of asphalt that has been heated to 135 °C and stir at 125 rpm for 1.5 h in a temperature atmosphere set at 60 °C to obtain Component C through sufficient mixing and reaction.

[0124] (4) Mix Component A, Component B, and Component C in a mass ratio of 28:25:33 and stir at 70 rpm for 50 s at 40 °C to obtain the modified asphalt material.

[0125] (2) Modified Asphalt Mixture and Its Preparation

[0126] At a temperature of 10 °C, mix 7.3 parts by mass of the above-obtained asphalt composition with 92.7 parts by mass of coarse and fine aggregates and mineral powder that conform to the grading curve of the SMA-10 grading range in the "Technical Specification for Construction of Highway Asphalt Pavement" (JTG F40~2017), and 0.35% by mass of polypropylene fiber of the total aggregate mass (stirring speed: 80 rpm, time: 30 s) to obtain the asphalt mixture.

[0127] (3) Application of the Modified Asphalt Mixture

[0128] Use the above asphalt mixture for cold paving construction: At a temperature of 10 °C, pave and form the modified asphalt mixture; after forming, use a hot air blower for curing treatment for 2 h.

[0129] Example 3

[0130] This example provides a modified asphalt material and its preparation method, a modified asphalt mixture containing the modified asphalt material, and its preparation method and application.

[0131] (1) Modified asphalt material and its preparation

[0132] 1) Weigh 82 parts by mass of bisphenol F type epoxy resin (manufacturer: Guodu Chemical Industry, model: YDF 170), 16 parts by mass of hydrogenated bisphenol A type epoxy resin (manufacturer: Anhui Xinyuan, model: xy518), 2 parts by mass of polyurethane modified epoxy resin (manufacturer: ADEKA Corporation, model: EPU-133L), 9 parts by mass of epoxy resin active diluent 1,4-butanediol diglycidyl ether (manufacturer: Anhui Xinyuan, brand: xy622), 4 parts by mass of Dow polyether polyol (VORANOL 2120), and 4 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, model: D 400). Heat them to 60°C and stir at a speed of 165 rpm for 15 min to fully mix and react to obtain Component A;

[0133] 2) Weigh 6 parts by mass of low-viscosity bisphenol F type epoxy resin (manufacturer: Hexion Inc., model: EPON 862), 3 parts by mass of epoxy resin diluent cyclohexanedimethanol diglycidyl ether (manufacturer: Huntsman Corporation, brand: DY-C), 4 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials Co., Ltd., model: HY 17), 80 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, model: D 230), and 1 part by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., model: ANCAMIDE 350A). Heat them to 60°C and stir at a speed of 70 rpm for 20 min. Then add 11 parts by mass of asphalt that has been heated to 135°C and stir at a speed of 85 rpm for 1.2 h in a temperature atmosphere set at 65°C to fully mix and react to obtain Component B;

[0134] 3) Heat 8 parts by mass of bisphenol F type epoxy resin (manufacturer: Nan Ya Chemical Industry, model: NEPF 170), 1 part by mass of styrene, 10 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., model: ANCAMIDE 350A), 10 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, model: D 230), 56 parts by mass of amide group curing agent (manufacturer: Air Products and Chemicals, Inc., model: ANCAMIDE 502), and 3 parts by mass of curing accelerator (manufacturer: Air Products and Chemicals, Inc., model: K54) to 49 °C, stir at a speed of 80 rpm for 15 min, then add 100 parts by mass of asphalt that has been heated to 130 °C, and stir at a speed of 120 rpm for 0.8 h in a temperature atmosphere with a set temperature of 61 °C to fully mix and react to obtain Component C;

[0135] 4) Mix Component A, Component B and Component C at a mass ratio of 30:23:31, and stir at a speed of 70 rpm for 50 s at 50 °C to obtain the modified asphalt material.

[0136] (2) Modified Asphalt Mixture and Its Preparation

[0137] At 50 °C, mix 5.6 parts of the asphalt composition obtained above with 94.4 parts by mass of coarse and fine aggregates and mineral powder conforming to the grading curve of AC-13 gradation range in the "Technical Specification for Construction of Highway Asphalt Pavement" (JTG F40~2017) (mixing speed 10 rpm, time 90 s) to obtain the asphalt mixture.

[0138] (3) Application of Modified Asphalt Mixture

[0139] Use the asphalt mixture for cold paving construction: At 50 °C, pave and form the modified asphalt mixture; after forming, carry out curing treatment for 2.1 h.

[0140] Example 4

[0141] This example provides a modified asphalt material and its preparation method, a modified asphalt mixture containing the modified asphalt material and its preparation method and application.

[0142] (1) Modified Asphalt Material and Its Preparation

[0143] 1) Weigh 76 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer: Hexion Inc., USA, model: EPON 862), 10 parts by mass of hydrogenated bisphenol A epoxy resin (manufacturer: Adeka Corporation, Japan, model: EP-4080E), 5 parts by mass of polyurethane-modified epoxy resin (manufacturer: Adeka Corporation, Japan, model: EPU-300A), 5 parts by mass of epoxy resin active diluent polypropylene glycol diglycidyl ether (manufacturer: Huntsman Corporation, USA, grade: DY 3601), and 4 parts by mass of Dow polyether polyol (VORANOL CP1055), and 4 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: T5000). Heat the mixture to 56 °C and stir at a speed of 180 rpm for 17 min to fully mix and react to obtain Component A;

[0144] 2) Weigh 10 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer: Nan Ya Plastics Corporation, Taiwan, China, model: NPEF 170), 2 parts by mass of epoxy resin diluent polypropylene glycol diglycidyl ether (manufacturer: Huntsman Corporation, USA, grade: DY-F), 3 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials Co., Ltd., China, model: HY 13), 70 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 230), and 3 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 350A). Heat the mixture to 62 °C and stir at a speed of 70 rpm for 18 min. Then add 12 parts by mass of asphalt that has been heated to 125 °C and stir at a speed of 85 rpm for 1.5 h in a temperature atmosphere set at 61 °C to fully mix and react to obtain Component B;

[0145] 3) Weigh 5 parts by mass of bisphenol F epoxy resin (manufacturer: Nan Ya Plastics Corporation, Taiwan, China, model: NPEF 170), 1 part by mass of styrene, 9 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE350A), 11 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 230), 50 parts by mass of amide-based curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 145), and 4 parts by mass of curing accelerator (manufacturer: Air Products and Chemicals, Inc., USA, model: K54). Heat each component to 50 °C and stir at a speed of 75 rpm for 20 min. Then add 70 parts by mass of asphalt that has been heated to 132 °C and stir at a speed of 100 rpm for 1 h in a temperature atmosphere set at 55 °C to fully mix and react to obtain Component C;

[0146] 4) Mix Component A, Component B, and Component C at a mass ratio of 25:25:30 and stir at a speed of 65 rpm for 60 s at 20 °C to obtain the modified asphalt material.

[0147] (2) Modified Asphalt Mixture and Its Preparation

[0148] At a temperature of 20 °C, 5.2 parts by mass of the modified asphalt material obtained above is mixed with 94.8 parts by mass of coarse and fine aggregates, mineral powder, and polyester fiber accounting for 0.3% of the total aggregate mass in the gradation curve of AC-16 gradation range that complies with the "Technical Specification for Construction of Highway Asphalt Pavement" (JTG F40-2017) (mixing speed: 80 rpm, time: 30 s) to obtain the modified asphalt mixture.

[0149] (3) Application of the modified asphalt mixture

[0150] Cold paving construction is carried out using the asphalt mixture: at a temperature of 20 °C, the above-mentioned modified asphalt mixture is paved and formed; after forming, infrared lamps (150 W / each) are used for auxiliary heating and curing treatment for 2 h.

[0151] Example 5

[0152] This example provides a modified asphalt material and its preparation method, a modified asphalt mixture containing this modified asphalt material and its preparation method and application.

[0153] (1) Modified asphalt material and its preparation

[0154] 1) 70 parts by mass of high-purity low-viscosity bisphenol A epoxy resin (manufacturer: Yangnong Jinhu Chemical Industry, model: YN1821), 8 parts by mass of hydrogenated bisphenol A epoxy resin (manufacturer: Adeka Japan, model: EP-4080E), 2 parts by mass of polyurethane-modified epoxy resin (manufacturer: Adeka Japan, model: EPU-300A), 5 parts by mass of epoxy resin active diluent cashew oil-modified bis-epoxy diluent (manufacturer: Zhuhai Kadale Chemical Industry, brand: LITE 513DF), 4 parts by mass of cashew phenol-modified polyol (manufacturer: Zhuhai Kadale Chemical Industry, brand: NX-9203), and 5 parts by mass of polyetheramine curing agent (manufacturer: BASF Germany, model: T403) are heated to 60 °C and stirred at a speed of 180 rpm for 12 min to be fully mixed and reacted to obtain Component A;

[0155] 2) Weigh 10 parts by mass of low-viscosity bisphenol F epoxy resin (manufacturer: Guodu Chemical Industry, model: YDF 170), 2 parts by mass of epoxy resin diluent cashew oil-modified monoglycidyl ether (manufacturer: Huntsman Corporation, USA, grade: DY-CNO), 3 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials Co., Ltd., model: HY 17), 71 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: T 230), and 4 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 350A). Heat the mixture to 65°C and stir at a speed of 80 rpm for 26 minutes. Then add 10 parts by mass of asphalt that has been heated to 130°C and stir at a speed of 90 rpm for 1 hour in a temperature atmosphere set at 64°C to obtain Component B through sufficient mixing and reaction.

[0156] 3) Weigh 5 parts by mass of bisphenol F epoxy resin (manufacturer: Guodu Chemical Industry, model: YDF 170), 1 part by mass of styrene, 9 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 350A), 12 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 230), 50 parts by mass of amide-based curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 501), and 4 parts by mass of curing accelerator (manufacturer: Air Products and Chemicals, Inc., USA, model: K54). Heat the mixture to 55°C and stir at a speed of 85 rpm for 15 minutes. Then add 90 parts by mass of asphalt that has been heated to 130°C and stir at a speed of 100 rpm for 1.5 hours in a temperature atmosphere set at 60°C to obtain Component C through sufficient mixing and reaction.

[0157] 4) Mix Component A, Component B, and Component C in a mass ratio of 24:26:31 and stir at a speed of 80 rpm for 45 seconds at 15°C to obtain the modified asphalt material.

[0158] (2) Modified asphalt mixture and its preparation

[0159] At 15°C, mix 4.9 parts by mass of the modified asphalt material obtained above with 95.1 parts by mass of coarse and fine aggregates conforming to the grading curve of the AC-16 grading range in the "Technical Specification for Construction of Highway Asphalt Pavement" (JTG F40-2017), and 0.2% by mass of polypropylene fiber of the total mass of the aggregates (stirring speed: 80 rpm, time: 30 seconds) to obtain the asphalt mixture.

[0160] (3) Application of the modified asphalt mixture

[0161] Use the asphalt mixture for cold paving construction: At 15°C, pave and form the modified asphalt mixture; after forming, use a highway doctor heating vehicle for 2 hours of curing treatment.

[0162] Example 6

[0163] This example is basically the same as Example 1, except that the preparation temperature of the modified asphalt mixture is 6 °C, and the climate temperature for cold paving construction using the modified asphalt mixture is 6 °C.

[0164] (1) Modified asphalt materials and their preparation

[0165] 1) 85 parts by mass of low-viscosity bisphenol F-type epoxy resin (manufacturer: Hexion Inc., USA, model: EPON 862), 8 parts by mass of hydrogenated bisphenol A-type epoxy resin (manufacturer: Anhui Xinyuan Chemical Co., Ltd., China, model: xy518), 3 parts by mass of polyurethane-modified epoxy resin (manufacturer: ADEKA Corporation, Japan, model: EPU-133L), 8 parts by mass of epoxy resin active diluent 1,6-hexanediol diglycidyl ether (manufacturer: Huntsman Corporation, USA, grade: DY-H), 5 parts by mass of Dow polyether polyol (VORANOL 220-260), and 4 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 230) are heated to 60 °C and stirred at a speed of 120 rpm for 20 min to fully mix and react to obtain Component A;

[0166] 2) 10 parts by mass of low-viscosity bisphenol F-type epoxy resin (manufacturer: Nan Ya Plastics Corporation, Taiwan, China, model: NPEF 170), 2 parts by mass of epoxy resin diluent polypropylene glycol diglycidyl ether (manufacturer: Huntsman Corporation, USA, grade: DY-F), 5 parts by mass of dimer acid (manufacturer: Anhui Hongtai New Materials Co., Ltd., China, model: HY 13), 75 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 230), and 3 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 350A) are heated to 60 °C and stirred at a speed of 65 rpm for 30 min, then 10 parts by mass of asphalt heated to 135 °C is added, and under a temperature atmosphere set at 60 °C, stirred at a speed of 80 rpm for 1 h to fully mix and react to obtain Component B;

[0167] 3) Heat 5 parts by mass of bisphenol F type epoxy resin (manufacturer: South Asia Epoxy Resin, model: NPEF 170), 2 parts by mass of styrene, 15 parts by mass of polyamide curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 350A), 10 parts by mass of polyetheramine curing agent (manufacturer: BASF SE, Germany, model: D 2000), 55 parts by mass of amide group curing agent (manufacturer: Air Products and Chemicals, Inc., USA, model: ANCAMIDE 150), and 2 parts by mass of curing accelerator (manufacturer: Huntsman Corporation, USA, model: Accelerator 960-1) to 50 °C, stir at a speed of 65 rpm for 26 min, then add 100 parts by mass of asphalt that has been heated to 135 °C, and stir at a speed of 80 rpm for 1 h in a temperature atmosphere set at 55 °C to obtain Component C through sufficient mixing and reaction;

[0168] 4) Mix Component A, Component B, and Component C in a mass ratio of 27:23:33, and stir at a speed of 50 rpm for 60 s at 40 °C to obtain the modified asphalt material.

[0169] (2) Modified Asphalt Mixture and Its Preparation

[0170] At a temperature of 6 °C, mix 6.8 parts by mass of the modified asphalt material obtained above with 93.2 parts by mass of coarse and fine aggregates and mineral powder that conform to the grading curve of the SMA-13 grading range in the "Technical Specification for Construction of Highway Asphalt Pavements" (JTG F40~2017), and 0.3% by mass of polypropylene fiber of the total mass of the aggregates (stirring speed 40 rpm, time 60 s) to obtain the asphalt mixture.

[0171] (3) Application of Modified Asphalt Mixture

[0172] Use the asphalt mixture for cold paving construction: At a temperature of 6 °C, pave and form the asphalt mixture; after forming, use a highway doctor heating vehicle for curing treatment for 2.5 h.

[0173] Result Analysis:

[0174] Refer to the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) to form specimens for the production mix ratio before construction, and conduct tests on Marshall stability, flow value, residual stability, and low-temperature bending strain. The results are shown in Table 1.

[0175] Table 1 List of Marshall Stability and Dynamic Stability Indexes for Each Specific Example

[0176]

[0177] It can be seen from the data in Table 1 that:

[0178] (1) Combining the Marshall stability and flow value of the modified asphalt mixture provided in the six groups of examples, after curing, they respectively exceed 20 kN and 44 (0.1 mm), which are significantly superior to the commonly used modified asphalt mixtures; therefore, the asphalt mixture provided in this application has good flexibility and impact resistance characteristics.

[0179] (2) Combining the low-temperature bending strain of the modified asphalt mixture provided in the six groups of examples, after curing, they all exceed 4100 με; therefore, the modified asphalt mixture provided in this application has good low-temperature crack resistance.

[0180] (3) Combining the dynamic stability (high-temperature stability index) of the modified asphalt mixture provided in the six groups of examples, after curing, they all exceed 17000 times / mm, and have obvious thermosetting properties, that is, no obvious rutting diseases will occur at high temperatures; therefore, the modified asphalt mixture provided in this application has good high-temperature stability, that is, it can withstand the long-term action of large tire pressures without rutting diseases.

[0181] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A modified asphalt material, characterized in that: The following raw material components are included, calculated by weight: Component A: 60-90 parts of epoxy resin, 5-25 parts of hydrogenated bisphenol A epoxy resin, 1-5 parts of polyurethane modified epoxy resin, 5-20 parts of epoxy resin active diluent, 1-5 parts of polyetheramine curing agent; Component B: 3 to 15 parts of asphalt and asphalt modifier B; Wherein, the asphalt modifier B comprises: 5 to 10 parts of epoxy resin, 1 to 3 parts of epoxy resin active diluent, 1 to 5 parts of dimer acid, 30 to 80 parts of polyether amine curing agent, and 1 to 4 parts of polyamide curing agent; Component C: 15 to 100 parts of asphalt and asphalt modifier C; wherein the asphalt modifier C comprises: 2 to 8 parts of bisphenol F epoxy resin, 1 to 5 parts of styrene, 9 to 15 parts of polyamide curing agent, 10 to 15 parts of polyetheramine curing agent, 30 to 60 parts of amide curing agent, 1 to 4 parts of curing accelerator; The mass ratio of component A, component B and component C is (24-30):(23-26):(31-33).

2. The modified asphalt material according to claim 1, characterized in that: The epoxy resin includes: a mixture of any one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, dimer acid modified epoxy resin, and high toughness modified epoxy resin; and / or The epoxy resin active diluent includes: a mixture of any one or more of monoepoxy glycidyl ether, diepoxy glycidyl ether, triepoxy glycidyl ether, and polyether polyol; and / or The curing accelerator includes: an amine accelerator, an imidazole and its salt accelerator, or a mixture of more than one of them; and / or The asphalt is selected from any one or more of 70# petroleum asphalt, 90# petroleum asphalt or 110# petroleum asphalt.

3. The modified asphalt material according to claim 2, characterized in that: The monoepoxy glycidyl ether comprises: C 12-14 A mixture of any one or more of fatty glycidyl ether, neodecanoic acid glycidyl ether, and cashew nut oil modified monoglycidyl ether; The diepoxy glycidyl ether includes: a mixture of any one or more of ethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, polyethylene glycol glycidyl ether, polypropylene glycol diglycidyl ether, cyclohexanedimethanol diglycidyl ether, neopentyl glycol glycidyl ether, 1,4-butanediol diglycidyl ether, etc.; The triepoxy glycidyl ether includes: trimethylolpropane glycidyl ether and / or castor oil polyglycidyl ether; The polyether polyol includes any one or more of Dow polyether polyol VORANOL 220-260, VORANOL 2110TB, VORANOL 2120, VORANOL CP1055, VORANOL CP450, PO3G H500, and NX 9203.

4. The method for preparing the modified asphalt material according to any one of claims 1 to 3, characterized in that: The method comprises: (1) subjecting epoxy resin, hydrogenated bisphenol A epoxy resin, polyurethane-modified epoxy resin, epoxy resin reactive diluent, and polyetheramine curing agent to a first thermal mixing treatment to obtain component A; (2) subjecting the epoxy resin, epoxy resin active diluent, dimer acid, polyetheramine curing agent, and polyamide curing agent to a second heat mixing treatment, and then subjecting the epoxy resin, epoxy resin active diluent, dimer acid, polyetheramine curing agent, and polyamide curing agent to a third heat mixing treatment with the asphalt subjected to the first preheating treatment, to obtain component B; wherein: the temperature of the first preheating treatment is greater than the temperature of the second heat mixing treatment; (3) subjecting the bisphenol F epoxy resin, styrene, polyamide curing agent, polyetheramine curing agent, amide curing agent, and curing accelerator to a fourth heat mixing treatment, and then subjecting the mixture to a fifth heat mixing treatment with the asphalt subjected to the second preheating treatment, to obtain component C; wherein: the temperature of the second preheating treatment is greater than the temperature of the fourth heat mixing treatment; (4) Subjecting component A, component B and component C to a sixth heat mixing treatment to obtain a modified asphalt material, wherein the sixth heat mixing treatment temperature is lower than the heat mixing treatment temperature in any of the above steps (1) to (3).

5. The method for preparing the modified asphalt material according to claim 4, characterized in that: In the step (1), the first heat mixing treatment conditions include: temperature 45-60° C., stirring speed 100-200 rpm, and treatment time 2-20 min; and / or In the step (2), the second heat mixing treatment conditions include: temperature 50-80°C, stirring speed 50-100 rpm, and treatment time 2-30 min; the first preheating treatment temperature is 115-142°C; the third heat mixing treatment conditions include: temperature 60-90°C, stirring speed 50-100 rpm, and treatment time 0.5-2 h; and / or In the step (3), the fourth heat mixing treatment conditions include: temperature 45-70°C, stirring speed 50-100 rpm, and treatment time 2-30 min; the second preheating treatment temperature is 117-142°C; the fifth heat mixing treatment conditions include: temperature 50-70°C, stirring speed 50-200 rpm, and treatment time 0.5-2 h; and / or In the step (4), the heat mixing treatment conditions include: the sixth heat mixing treatment includes the conditions: temperature 0 to 50°C, stirring speed 5 to 80 rpm, and treatment time 30 to 60 s.

6. A modified asphalt mixture, characterized in that: The modified asphalt material comprises the modified asphalt material according to any one of claims 1 to 3; and also comprises aggregate, mineral powder, polypropylene fiber or polyester fiber.

7. The modified asphalt mixture according to claim 6, characterized in that: In the modified asphalt mixture, the mass ratio of the modified asphalt material to the total mass of the aggregate and the mineral powder is 3.8% to 8.0%; the mass ratio of the polypropylene fiber or the polyester fiber to the aggregate is 0.15% to 0.35%.

8. The method for preparing the modified asphalt mixture according to claim 6 or 7, characterized in that: The preparation method comprises the following steps: S1, providing a modified asphalt material, aggregate, mineral powder, polypropylene fiber or polyester fiber of the modified asphalt material according to any one of claims 1 to 3; S2, mixing the modified asphalt material, aggregate, mineral powder, polypropylene fiber or polyester fiber; the mixing conditions include: temperature 0-50°C, rotation speed 10-80rpm, time 30-90s.

9. Use of the modified asphalt mixture according to claim 6 or 7 in preventive maintenance or corrective repair of pavement.

10. The use according to claim 9, characterized in that: Cold laying construction includes the following steps: M1, providing the above-mentioned modified asphalt mixture; M2, paving and shaping the modified asphalt mixture; M3, after forming, curing treatment is carried out, the climate temperature is 0 ~ 55 ℃, and the time is 1 ~ 6h.

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