High rutting resistance low temperature construction asphalt mixture and preparation method thereof

Abstract

The application relates to the technical field of asphalt pavements, and specifically discloses a high-anti-rutting low-temperature construction asphalt mixture and a preparation method thereof. The preparation method specifically comprises the following steps: uniformly mixing SBS modifier with base asphalt, mixing and emulsifying soap solution prepared by using an emulsifying agent and curing solution prepared by using an epoxy curing agent, and preparing SBS modified emulsified asphalt; pre-mixing water-based epoxy resin with mineral aggregate at normal temperature, then adding the SBS modified emulsified asphalt to mix, so as to prepare the high-anti-rutting low-temperature construction asphalt mixture; and the epoxy curing agent is a mixture of m-xylylenediamine and 703 curing agent. The application introduces the asphalt emulsification technology, so that the mixing temperature and construction temperature of the asphalt mixture can be significantly reduced. In addition, the epoxy resin is further added in the SBS modified emulsified asphalt, the reaction can occur at normal temperature, the high-temperature anti-rutting capacity of the asphalt mixture can be significantly improved, and the dynamic stability is greater than 10000 times / mm.

Description

Technical Field

[0001] This application relates to the technical field of asphalt pavement, and more specifically, to a high-rutting-resistant low-temperature construction asphalt mixture and its preparation method. Background Technology

[0002] In recent years, with increasingly stringent global climate change and environmental protection requirements, low-carbon pavement technology has received widespread attention and research both domestically and internationally as an important means of reducing greenhouse gas emissions and achieving energy conservation and emission reduction. SBS modified asphalt pavement is a major type of road structure in my country. However, traditional hot-mix asphalt mixing requires maintaining high temperatures during mixing, transportation, and construction, resulting in significant energy consumption and the release of large amounts of carbon dioxide and other pollutants, contributing to environmental problems such as the greenhouse effect. Furthermore, demanding road conditions such as high traffic volume and high load ratios mean that asphalt pavements are prone to damage shortly after application, necessitating road repairs.

[0003] To achieve low-carbon and green construction of asphalt pavements, engineers have conducted extensive research on methods such as "warm-mix asphalt." However, these methods can only reduce the construction temperature by about 15-20°C, still resulting in high energy consumption and carbon emissions. Based on relevant principles, converting viscoelastic petroleum asphalt into a water-based binder—emulsified asphalt—through emulsification, thus shifting the asphalt pavement construction process from high-temperature "hot-mix" to room-temperature "cold-mix," is the most direct and fundamental path to achieving low-carbon construction of asphalt pavements. However, the properties of existing emulsified asphalt are lower than those of hot-mix asphalt, especially under heavy traffic. Its dynamic stability index, reflecting its resistance to rutting, is generally only 5000 cycles / mm, which is still insufficient to prevent rutting. This generates a large amount of waste material, increases the construction and maintenance burden, and the continuous maintenance also leads to increased carbon emissions.

[0004] Therefore, there is an urgent need to develop low-carbon, high-performance road materials to meet the complex working conditions of asphalt pavement applications. Summary of the Invention

[0005] This application provides a high-rutting-resistant asphalt mixture for low-temperature construction and its preparation method. This application introduces asphalt emulsification technology, which can significantly reduce the mixing and construction temperatures of the asphalt mixture. Furthermore, epoxy resin is added to the SBS-modified emulsified asphalt, which can react at room temperature, significantly improving the asphalt mixture's high-temperature rutting resistance, with a dynamic stability >10,000 cycles / mm. It can also be constructed at room temperature, making it low-carbon and environmentally friendly.

[0006] In a first aspect, this application provides a method for preparing a high-rutting-resistant asphalt mixture for low-temperature construction, employing the following technical solution:

[0007] A method for preparing a high-rutting-resistant asphalt mixture for low-temperature construction, the method specifically includes the following steps:

[0008] SBS modifier is mixed evenly with base asphalt, and then mixed and emulsified with soap solution prepared using emulsifier and curing liquid prepared using epoxy curing agent to obtain SBS modified emulsified asphalt.

[0009] Waterborne epoxy resin and aggregates are pre-mixed at room temperature, and then the SBS modified emulsified asphalt is added and mixed to obtain a high-rutting-resistant low-temperature construction asphalt mixture.

[0010] The epoxy curing agent is a mixture of m-phenylenediamine and 703 curing agent; the concentration of the epoxy curing agent in the curing liquid is 8-20%; the weight ratio of the waterborne epoxy resin to the curing liquid is 1:(0.5-1).

[0011] In this application, the pre-mixing of waterborne epoxy resin can refine the particle size of the epoxy emulsion through the shearing action of the aggregate, further promoting its uniform coating on the aggregate surface, increasing the contact surface area with the emulsified asphalt and curing agent, and promoting the uniform dispersion of the modified material and epoxy material. Furthermore, since epoxy resin is an oil-based substance, it is already uniformly coated on the stone surface beforehand. The subsequent addition of SBS-modified emulsified asphalt can reduce the adsorption loss of the curing agent by the aggregate or filler, promoting the effective progress of the curing reaction and thus fully realizing the modifying effect.

[0012] This application introduces asphalt emulsification and water-based epoxy technology, which can significantly reduce the mixing temperature and construction temperature of asphalt mixtures, significantly improve the high-temperature rutting resistance of asphalt mixtures, achieve a dynamic stability of >10,000 times / mm, and can be constructed at room temperature, making it low-carbon and environmentally friendly.

[0013] As a binder for construction at room temperature, emulsified asphalt is required to remain stable during mixing without demulsification, but when laid on the road surface after mixing, it must quickly demulsify and develop strength, achieving both slow cracking and rapid setting. Based on the emulsification and demulsification mechanisms of asphalt, the addition of an emulsifier plays a crucial role. An emulsifier is a surfactant that enables asphalt particles to be uniformly dispersed in water, forming a stable oil-in-water or water-in-oil emulsion. During construction, this emulsion acts as an isolation layer, effectively encapsulating the SBS emulsion mixture until it comes into contact with aggregates or other materials. Only through mechanical action during high-intensity rolling or impact does the SBS-modified emulsified asphalt release, thus delaying its demulsification process.

[0014] m-Phenylenediamine is an aliphatic amine containing a benzene ring, with the molecular formula C8H12H2O. 12Nitrogen gas (N2) is a colorless liquid at room temperature and an important chemical raw material. In related technologies, it is mainly used to manufacture high-performance epoxy resin curing agents that are heat-resistant, non-toxic, suitable for underwater construction, and rapidly cured by heating. It is a raw material for polyurethane resins and synthetic functional epoxy resins, and is also used in rubber products, photosensitive plastics, pesticides, coatings, nylon products, fiber finishing agents, rust inhibitors, chelating agents, lubricants, paper processing, and other fields.

[0015] 703 curing agent is a brownish-red viscous liquid formed by the condensation of phenol, formaldehyde, and ethylenediamine. It can cure at 0-15℃ under humid conditions. Both m-phenylenediamine and 703 curing agent are aliphatic amines. For m-phenylenediamine, due to the presence of aliphatic primary amine groups in its molecular structure, it can be used as a room-temperature curing agent. The presence of a benzene ring in its molecular structure gives the cured product better heat resistance than aliphatic polyamines, while also providing excellent chemical resistance. When 703 curing agent and m-phenylenediamine are used together, under their combined action, the two react through the condensation of aldehyde and amine to form an imine, and through acylation rearrangement driven by oxygen lone pair electrons, yielding a diamide compound. This thermodynamically stable amide compound improves the high-temperature rutting resistance of the resulting asphalt mixture.

[0016] Experimental analysis shows that the type and dosage of curing agent affect the curing reaction of epoxy resin, thus affecting the high-temperature rutting resistance of asphalt mixtures. When the curing agent is either m-phenylenediamine or 703 curing agent, the high-temperature rutting resistance of the asphalt mixture is relatively low. When the curing agent is a mixture of m-phenylenediamine and 703 curing agent, i.e., when 703 curing agent and m-phenylenediamine are used together, their combination with epoxy resin can effectively improve the high-temperature rutting resistance of the resulting asphalt mixture.

[0017] In one specific embodiment, the concentration of the epoxy curing agent in the curing liquid is 8%, 12%, 14%, 16%, or 20%.

[0018] In some specific embodiments, the concentration of the epoxy curing agent in the curing liquid is 8-12%, 8-14%, 8-16%, 12-14%, 12-16%, 12-18%, 12-20%, 14-16%, 14-18%, 14-20%, 16-18%, 16-20%, or 18-20%.

[0019] Optionally, the epoxy curing agent comprises the following components in parts by weight: 3-8 parts of m-phenylenediamine; 12-20 parts of 703 curing agent.

[0020] Optionally, the epoxy curing agent contains 4-6 parts by weight of m-phenylenediamine.

[0021] In one specific implementation, the epoxy curing agent contains 3, 4, 5, 6, or 8 parts by weight of m-phenylenediamine.

[0022] In some specific implementations, the epoxy curing agent contains m-phenylenediamine in the following weight proportions: 3-4 parts, 3-5 parts, 3-6 parts, 3-8 parts, 4-5 parts, 4-6 parts, 4-8 parts, 5-6 parts, 5-8 parts, and 6-8 parts.

[0023] Optionally, the 703 curing agent in the epoxy curing agent is 15-18 parts by weight.

[0024] In one specific implementation, the epoxy curing agent comprises 12 parts, 15 parts, 16 parts, 18 parts, and 20 parts by weight of 703 curing agent.

[0025] In some specific implementations, the epoxy curing agent contains 703 curing agent in the following weight proportions: 12-15 parts, 12-16 parts, 12-18 parts, 12-20 parts, 15-16 parts, 15-18 parts, 15-20 parts, 16-18 parts, 16-20 parts, and 18-20 parts.

[0026] Optionally, the weight ratio of the SBS modifier to the base asphalt is (1-15):100 to obtain an asphalt-SBS mixture.

[0027] Optionally, the bitumen-SBS mixture is mixed with the soap solution at a weight ratio of 1:(0.5-1).

[0028] Optionally, the asphalt-SBS mixture is mixed with the curing liquid at a weight ratio of 1:(0.2-0.5).

[0029] In one specific implementation, the weight ratio of the asphalt-SBS mixture to the curing liquid can be 1:0.2; 1:0.3; 1:0.4; or 1:0.5.

[0030] In some specific implementations, the weight ratio of the asphalt-SBS mixture to the curing liquid can be 1:(0.2-0.3); 1:(0.2-0.4); 1:(0.3-0.4); 1:(0.3-0.5); 1:(0.4-0.5).

[0031] Optionally, the SBS modifier is a common SBS modifier or a dry SBS modifier.

[0032] Optionally, the concentration of emulsifier in the soap solution is 0.5-10%.

[0033] Optionally, the emulsifier is selected from anionic and cationic types.

[0034] Optionally, the emulsifier is selected from alkylamines, alkylpropylene diamines, amide amines, imidazolines, lignin amines, quaternary ammonium salts, and fatty acid ester quaternary ammonium salts.

[0035] Secondly, this application provides a high-rutting-resistant low-temperature construction asphalt mixture prepared using the above-described preparation method.

[0036] The high-rutting-resistant low-temperature construction asphalt mixture of this application has a dynamic stability of >10,000 cycles / mm, and can be constructed at room temperature, making it low-carbon and environmentally friendly.

[0037] In summary, this application has the following beneficial effects:

[0038] This application introduces asphalt emulsification technology, which can significantly reduce the mixing temperature and construction temperature of asphalt mixtures. In addition, an epoxy curing agent is added to the SBS modified emulsified asphalt, which can react at room temperature, significantly improving the high-temperature rutting resistance of asphalt mixtures, with a dynamic stability of >10,000 cycles / mm, and can be applied at room temperature, making it low-carbon and environmentally friendly. Detailed Implementation

[0039] Before describing the embodiments of this application in detail, it should be understood that the terminology used herein is for the purpose of describing a particular embodiment only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the term pertains.

[0040] This application provides a high-rutting-resistant low-temperature construction asphalt mixture and its preparation method.

[0041] The above preparation method specifically includes the following steps:

[0042] (1) Mix the SBS modifier with the base asphalt evenly to obtain an asphalt-SBS mixture.

[0043] The weight ratio of SBS modifier to base asphalt is (1-15):100.

[0044] In one specific embodiment, the SBS modifier and the base asphalt are stirred at 150-190°C for 0.2-1 h at a stirring speed of 100-300 r / min to obtain an asphalt-SBS mixture.

[0045] The SBS modifier can be a regular SBS modifier or a dry-process SBS modifier.

[0046] (2) Dissolve the emulsifier in sterile water, mix well, and obtain soap solution.

[0047] The concentration of the emulsifier is 0.5-10%. The emulsifier is selected from anionic and cationic types. The emulsifier is selected from alkylamines, alkylpropylene diamines, amide amines, imidazolines, lignin amines, quaternary ammonium salts, and fatty acid ester quaternary ammonium salts.

[0048] (3) Dissolve the epoxy curing agent in sterile water to obtain the curing solution.

[0049] The concentration of the epoxy curing agent is 2-5%. The epoxy curing agent is a mixture of m-phenylenediamine and 703 curing agent. In the curing solution, the concentration of the epoxy curing agent is 8-20%.

[0050] In one specific embodiment, the epoxy curing agent comprises the following components in parts by weight: 3-8 parts of m-phenylenediamine; 12-20 parts of 703 curing agent. Further, the m-phenylenediamine in the epoxy curing agent comprises 4-6 parts by weight. Further, the 703 curing agent in the epoxy curing agent comprises 15-18 parts by weight.

[0051] (4) The asphalt-SBS mixture is mixed with soap solution and curing liquid and placed in an emulsification device for emulsification, and then placed in a water bath for cooling to obtain SBS modified emulsified asphalt.

[0052] In one specific implementation, the emulsification conditions are: emulsification at a shear rate of 1000-8000 r / min for 0.5-1 h.

[0053] The asphalt-SBS mixture is mixed with soap solution at a weight ratio of 1:(0.25-1). The asphalt-SBS mixture is mixed with curing liquid at a weight ratio of 1:(0.2-0.5).

[0054] (5) The waterborne epoxy resin and the aggregate are mixed at room temperature for 20-40 minutes, and then the SBS modified emulsified asphalt prepared above is added and mixed to obtain a high-rutting-resistant low-temperature construction asphalt mixture. The weight ratio of waterborne epoxy resin to curing liquid is 1:(0.5-1).

[0055] The m-phenylenediamine used in this application has CAS number 1477-55-0 and was purchased from Jiangsu Xinsu New Materials Co., Ltd. The waterborne epoxy resin used is epoxy resin E51, with a viscosity of 10000-15000 mPas, purchased from Guangzhou Fufeng Chemical Technology Co., Ltd. The 703 curing agent is a brownish-red viscous liquid formed by the condensation of phenol, formaldehyde, and ethylenediamine, with an amine value of 480-520 mg KOH / g.

[0056] The dry-process SBS modifier used in this application is produced by Guolu Gaoke (Beijing) Engineering Technology Research Institute Co., Ltd., with a melt flow index of 2 g / 10 min and a particle size of 200 μm. The common SBS modifier is YH791H type SBS modifier, produced by China Petroleum & Chemical Corporation (Sinopec). The asphalt used is 70# base asphalt, produced by Sinopec Qilu Branch. All other raw materials, reagents, and solvents are commercially available.

[0057] Ordinary SBS modifiers need to be pre-ground, treated, and screened before use to obtain ordinary SBS modifiers with a melt index > 0.2 g / 10 min and a particle size of 50-800 μm.

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0059] The present application will be further described in detail below with reference to embodiments, comparative examples and test results.

[0060] Example

[0061] Example 1

[0062] This embodiment provides a method for preparing a high-rutting-resistant asphalt mixture for low-temperature construction. The specific parameters for each step in this preparation method are shown in Table 1.

[0063] The above preparation method specifically includes the following steps:

[0064] (1) The SBS modifier and the base asphalt were mixed at a weight ratio of 5:100 and stirred at 180°C for 0.5 h to obtain the asphalt-SBS mixture. The SBS modifier was a dry SBS modifier.

[0065] (2) Dissolve the emulsifier in sterile water, mix well, and obtain soap solution.

[0066] The concentration of the emulsifier is 3%. The emulsifier is a mixture of dodecyl sulfonate, nonadecanotrimethylammonium chloride, and imidazoline, with a weight ratio of 1:1:2.

[0067] (3) Dissolve the epoxy curing agent in sterile water to obtain the curing solution.

[0068] The concentration of the epoxy curing agent is 14%. The epoxy curing agent is a mixture of m-phenylenediamine and 703 curing agent.

[0069] (4) Mix the asphalt-SBS mixture with soap solution and curing liquid and place it in an emulsification device for emulsification. Emulsify at a shear rate of 1000-8000 r / min for 0.5 h, and then place it in a water bath for cooling to obtain SBS modified emulsified asphalt.

[0070] The asphalt-SBS mixture is mixed with soap solution at a weight ratio of 1:0.5. The asphalt-SBS mixture is mixed with curing liquid at a weight ratio of 1:0.2.

[0071] (5) The waterborne epoxy resin and the aggregate are mixed at room temperature for 30 minutes, and then the SBS modified emulsified asphalt prepared above is added and mixed to obtain a high rutting resistance low temperature construction asphalt mixture. The weight ratio of waterborne epoxy resin to curing liquid is 1:0.5.

[0072] Example 2-17

[0073] Examples 2-17 provide methods for preparing high-rutting-resistant asphalt mixtures for low-temperature construction. The specific parameters for each step in the preparation methods of the above examples are shown in Table 1.

[0074] The specific differences in the above embodiments are as follows, while the rest are the same as the steps in Embodiment 1.

[0075] The difference between Examples 2-4 and Example 1 is the weight ratio of the asphalt-SBS mixture to the curing liquid.

[0076] The difference between Examples 5-8 and Example 2 is the concentration of epoxy curing agent in the curing solution.

[0077] The difference between Examples 9-12 and Example 2 is the amount of intermediate-phenylenediamine added to the curing solution.

[0078] The difference between Examples 13-16 and Example 2 is the amount of 703 curing agent added to the curing liquid.

[0079] The difference between Example 17 and Example 2 is that the type of SBS modifier is different.

[0080] Comparative Example

[0081] Comparative Example 1

[0082] Comparative Example 1 provides a method for preparing asphalt mixture. The difference between the comparative example and Example 2 is that no curing liquid was added. All other steps are the same as in Example 1, and the specific parameters for each step are shown in Table 1.

[0083] Comparative Example 2

[0084] Comparative Example 2 provides a method for preparing asphalt mixture. The difference between the comparative example and Example 2 is that the curing liquid contains only 703 curing agent. All other steps are the same as in Example 1, and the specific parameters for each step are shown in Table 1.

[0085] Comparative Example 3

[0086] Comparative Example 3 provides a method for preparing an asphalt mixture. The difference between the comparative example and Example 2 is that the curing liquid contains only m-phenylenediamine. All other steps are the same as in Example 1, and the specific parameters for each step are shown in Table 1.

[0087] Table 1. Parameters for some steps in the embodiments and comparative examples.

[0088]

[0089] Performance testing

[0090] The asphalt mixtures prepared in the above embodiments and comparative examples were subjected to the following tests. The test results are shown in Table 1. The test methods are as follows:

[0091] (1) Dynamic stability test

[0092] The dynamic stability test of asphalt mixtures was conducted in accordance with the test method T0719 of the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011). The test results are shown in Table 1.

[0093] (2) Maximum bending tensile strain

[0094] Using a roller mill, plate-shaped specimens (300mm×300mm×50mm) were prepared from the asphalt mixtures of the above embodiments or comparative examples, referring to the test method of "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011) T0703. Prismatic specimens with dimensions of 250mm×30mm×35mm and a span of 200mm were then cut.

[0095] The asphalt mixture was subjected to a room temperature bending test according to the test method T0715 of the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011), and the maximum bending tensile strain at the bottom of the beam was measured for different prism specimens. The test results are shown in Table 1.

[0096] As shown in Table 1, comparing the test results of Examples 1-17 and Comparative Examples 1-3, it is evident that when the asphalt mixture does not contain the curing liquid of this application, or when the added curing liquid contains only m-phenylenediamine or only 703 curing agent, the dynamic stability of the resulting asphalt mixture can only reach below 5000 cycles / mm. When the curing liquid of this application is added to the asphalt mixture, the dynamic stability of the resulting asphalt mixture can reach above 10000 cycles / mm, and the maximum flexural strain of the asphalt mixture can also be increased.

[0097] Comparing the test results of Examples 1-4, it can be seen that when the weight ratio of asphalt-SBS mixture to curing liquid in the asphalt mixture is 1:(0.2-0.5), the dynamic stability of the asphalt mixture can reach over 10,000 cycles / mm, and the maximum flexural strain of the asphalt mixture can be increased. Furthermore, when the weight ratio of asphalt-SBS mixture to curing liquid in the asphalt mixture is 1:(0.3-0.4), the dynamic stability and maximum flexural strain of the asphalt mixture can be further improved.

[0098] Comparing the test results of Examples 3 and 5-8, it can be seen that when the concentration of curing agent in the curing liquid is 12-20%, the dynamic stability of the asphalt mixture can reach over 10,000 cycles / mm, and the maximum flexural strain of the asphalt mixture can be increased. Furthermore, when the concentration of curing agent in the curing liquid is 12-16%, the dynamic stability and maximum flexural strain of the asphalt mixture can be further improved.

[0099] Comparing the test results of Examples 3 and 9-12, it can be seen that when the amount of m-phenylenediamine in the curing liquid is 3-8 parts, the dynamic stability of the asphalt mixture can reach more than 10,000 cycles / mm, and the maximum flexural strain of the asphalt mixture can be increased. Furthermore, when the amount of m-phenylenediamine in the curing liquid is 4-6 parts, the dynamic stability and maximum flexural strain of the asphalt mixture can be further improved.

[0100] Comparing the test results of Examples 3 and 13-16, it can be seen that when the amount of 703 curing agent in the curing liquid is 12-20 parts, the dynamic stability of the asphalt mixture can reach more than 10,000 cycles / mm, and the maximum flexural strain of the asphalt mixture can be increased. Furthermore, when the amount of 703 curing agent in the curing liquid is 15-18 parts, the dynamic stability and maximum flexural strain of the asphalt mixture can be further improved.

[0101] Comparing the test results of Examples 3 and 17, it can be seen that the SBS modifier, whether dry-process SBS modifier or ordinary SBS modifier, has a relatively small impact on the dynamic stability and maximum flexural strain of the prepared asphalt mixture. Furthermore, when the SBS modifier is dry-process SBS modifier, the dynamic stability and maximum flexural strain of the asphalt mixture are both superior to those when the SBS modifier is ordinary SBS modifier.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for preparing a high-rutting-resistant asphalt mixture for low-temperature construction, characterized in that, The preparation method specifically includes the following steps: SBS modifier is mixed evenly with base asphalt, and then mixed and emulsified with soap solution prepared using emulsifier and curing liquid prepared using epoxy curing agent to obtain SBS modified emulsified asphalt. Waterborne epoxy resin and aggregates are pre-mixed at room temperature, and then the SBS modified emulsified asphalt is added and mixed to obtain a high-rutting-resistant low-temperature construction asphalt mixture. The epoxy curing agent is a mixture of m-phenylenediamine and 703 curing agent; the concentration of the epoxy curing agent in the curing liquid is 8-20%; the weight ratio of the waterborne epoxy resin to the curing liquid is 1:(0.5-1).

2. The preparation method according to claim 1, characterized in that, The epoxy curing agent comprises the following components in parts by weight: 3-8 parts of m-phenylenediamine; 12-20 parts of 703 curing agent.

3. The preparation method according to claim 2, characterized in that, In the epoxy curing agent, the m-phenylenediamine is present in parts by weight of 4-6 parts.

4. The preparation method according to claim 2, characterized in that, In the epoxy curing agent, the 703 curing agent is present in 15-18 parts by weight.

5. The preparation method according to claim 1, characterized in that, The weight ratio of the SBS modifier to the base asphalt is (1-15):100, thus obtaining an asphalt-SBS mixture.

6. The preparation method according to claim 5, characterized in that, The asphalt-SBS mixture is mixed with the soap solution at a weight ratio of 1:(0.5-1).

7. The preparation method according to claim 5, characterized in that, The asphalt-SBS mixture is mixed with the curing liquid at a weight ratio of 1:(0.2-0.5).

8. The preparation method according to claim 1, characterized in that, The SBS modifier is a common SBS modifier or a dry SBS modifier.

9. The preparation method according to claim 1, characterized in that, In the soap solution, the concentration of the emulsifier is 0.5-10%.

10. The preparation method according to claim 1, characterized in that, The emulsifier is selected from anionic and cationic types.

11. The preparation method according to claim 1, characterized in that, The emulsifier is selected from alkylamines, alkylpropylene diamines, amide amines, imidazolines, lignin amines, and quaternary ammonium salts.

12. The preparation method according to claim 11, characterized in that, The quaternary ammonium salt is a fatty acid ester quaternary ammonium salt.

13. A high-rutting-resistant low-temperature construction asphalt mixture prepared by any one of claims 1-12.

Images