High-permeability asphalt composition for repairing and preparation method thereof

Abstract

The invention discloses a high-permeability asphalt composition for repairing and a preparation method thereof, and relates to the technical field of high-permeability asphalt. The preparation method comprises the following steps: firstly, introducing an epoxy group into ethanedithiol by using 1, 2-ethanedithiol and epoxy butene through a click reaction, further reacting 4-chloro-1-butene with triethylamine, and introducing double bonds into the generated quaternary ammonium salt to obtain a quaternary ammonium compound containing double bonds; the preparation method comprises the following steps: firstly, preparing a self-made asphalt emulsifier with an epoxy group by using ethylene dithiol modified by epoxy butene and a quaternary ammonium compound containing double bonds, secondly, dehydrating 5-(hydroxymethyl) benzene-1, 2, 3-triol and acrylic acid to obtain 5-(hydroxymethyl) benzene-1, 2, 3-triol modified acrylate, and further performing addition polymerization to obtain 5-(hydroxymethyl) benzene-1, 2, 3-triol modified acrylate; 1, 2, 3-triol modified polyacrylate is added into the asphalt emulsion as a curing agent. According to the high-permeability asphalt composition for repairing prepared by the invention, on the basis of realizing high permeability, the bonding strength between asphalt and a pavement is improved, and the service life of the asphalt is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of high-permeability asphalt, in particular to a high-permeability asphalt composition for repair and a preparation method thereof. Background Art

[0002] With the continuous development of my country's economy, urban construction has gradually been promoted to a new stage, and highway construction has become more and more perfect. At present, most of my country's high-grade highways adopt a paving form combining semi-rigid base and asphalt surface layer. The base layer mostly uses stable graded materials such as cement, lime, and granular materials, while the surface layer uses ordinary asphalt concrete or emulsified asphalt concrete pavement. As the asphalt pavement built in the early days increases with the increase of service life, under the influence of driving loads and various natural factors, the asphalt road gradually ages. Due to the loss of oil on the road surface asphalt, it becomes rough and crisp, and some slight cracks will appear on the surface. At this time, the surface aggregate of the road surface will become loose, the water permeability coefficient is too large, and the disease resistance is low. If not handled in time, large pieces will soon fall off and cracks will appear, seriously affecting travel safety. At present, the four major types of materials used in the market are kerosene asphalt, kerosene diluted asphalt, emulsified asphalt, and high-permeability emulsified asphalt. These materials have their own advantages and disadvantages. Among them, kerosene asphalt, the representative of the penetration oil, was used in various projects in the early days due to its low price and good permeability. However, kerosene asphalt has serious environmental pollution, is volatile, has a low ignition point, and has many unsafe factors. In today's advocacy of economic and environmental protection, it is gradually being eliminated, and more and more people are focusing on the research and development of emulsified asphalt. Emulsified asphalt has high adhesion, is relatively stable after complete demulsification, will not volatilize, and has high safety, energy saving and emission reduction, and has good economic and environmental benefits. However, the permeability of emulsified asphalt is relatively poor, so in the following research, the main problem is how to prepare high-permeability emulsified asphalt to deal with the road safety problems caused by asphalt aging. Summary of the invention

[0003] The purpose of the present invention is to provide a high-penetration asphalt composition for repair and a preparation method thereof, so as to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-permeability asphalt composition for repair, characterized in that the high-permeability asphalt composition for repair includes base asphalt, water, a homemade asphalt emulsifier, a homemade asphalt curing agent, a penetrant, a stabilizer, an initiator, and a catalyst.

[0005] Furthermore, the homemade asphalt emulsifier uses 1,2-ethanedithiol, epoxybutene, and benzophenone to obtain epoxybutene-modified ethanedithiol through a UV curing reaction, uses 4-chloro-1-butene and triethylamine to obtain a quaternary ammonium compound containing a double bond, and finally obtains the homemade asphalt emulsifier through a UV curing click reaction between epoxybutene-modified ethanedithiol and the quaternary ammonium compound containing a double bond.

[0006] Furthermore, the homemade asphalt curing agent is prepared by dehydrating 5-(hydroxymethyl)benzene-1,2,3-triol and acrylic acid to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified acrylate, which is further polymerized to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate.

[0007] Furthermore, the asphalt is No. 70 base asphalt, the penetrant is one or more of aviation kerosene, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and the stabilizer is one or more of calcium chloride, ammonium chloride, and sodium carboxymethyl cellulose.

[0008] Furthermore, the initiator is one or more of azobisisobutyronitrile, benzoyl peroxide, and potassium persulfate, and the catalyst is one or more of aluminum chloride, zinc chloride, and ferric chloride.

[0009] Furthermore, a method for preparing a high-permeability asphalt composition for repair includes the following preparation steps:

[0010] (1) dissolving 1,2-ethanedithiol, epoxybutene, and benzophenone in anhydrous ethanol, stirring for 2 to 4 hours at 40 to 60° C., ultraviolet light wavelength of 250 to 360 nm, and a stirring rate of 200 to 400 r / min under a nitrogen atmosphere, and then transferring the mixture to a drying oven, drying the mixture at 50 to 60° C. for 2 to 4 hours to obtain epoxybutene-modified ethanedithiol;

[0011] (2) Add 4-chloro-1-butene and potassium iodide to an ice-water bath, stir at a stirring rate of 300-400 rpm for 20-40 min, then add triethylamine at a rate of 3-6 drops / s, stir at 20-30° C. and a stirring rate of 600-1000 rpm for 2-3 h. After the reaction is completed, perform vacuum distillation at 30-40° C. until only a small amount of liquid remains in the distillation flask, stop the vacuum distillation, place the distillation flask in an ice-water bath and quickly cool it, filter under nitrogen protection, and quickly wash the product with acetone for 3-6 times, recover the acetone, and place all the solids in a vacuum dryer at room temperature and dry them for 2-4 h to obtain a quaternary ammonium compound containing a double bond;

[0012] (3) epoxybutene-modified ethanedithiol, a quaternary ammonium compound containing a double bond, and 2,2-dimethoxy-2-phenylacetophenone are dissolved in anhydrous ethanol, stirred at 30-50° C., an ultraviolet light wavelength of 300-350 nm, and a stirring rate of 600-800 rpm for 3-6 h under a nitrogen atmosphere, and then moved to a drying oven and dried at 50-60° C. for 2-4 h to obtain a homemade asphalt emulsifier;

[0013] (4) Add acrylic acid and 60% sulfuric acid solution to tetrahydrofuran, stir at 60-80° C. and 300-400 rpm for 50-60 min, continue to add 5-(hydroxymethyl)benzene-1,2,3-triol, stir at 60-80° C. and 300-400 rpm for 2-4 h, continue to add azobisisobutyronitrile, stir at 50-70° C. and 600-1000 rpm for 4-6 h, cool, filter with a vacuum filtration pump to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, wash with ether 3-6 times to obtain a purified homemade asphalt curing agent;

[0014] (5) Add 10 to 20 parts of homemade asphalt emulsifier to 40 to 50 parts of water, stir at 40 to 60°C at 200 to 300 rpm for 20 to 30 minutes, add 50 to 60 parts of base asphalt, transfer to a colloid mill and grind at 130 to 150°C at 2000 to 3000 rpm for 1 to 2 hours, cool to room temperature, continue to add 10 to 20 parts of homemade asphalt curing agent, 20 to 30 parts of penetrant, 5 to 10 parts of stabilizer, 1 to 5 parts of initiator, and 1 to 3 parts of catalyst, stir at 500 to 800 rpm for 50 to 60 minutes at room temperature to obtain a high-penetration asphalt composition for repair.

[0015] Furthermore, in step (1), by weight, 20 to 30 parts of 1,2-ethanedithiol, 30 to 40 parts of epoxybutene, 1 to 3 parts of benzophenone, and 52 to 60 parts of anhydrous ethanol are used.

[0016] Furthermore, in step (2), by weight, 30 to 40 parts of 4-chloro-1-butene, 1 to 5 parts of potassium iodide, and 30 to 40 parts of triethylamine are used.

[0017] Furthermore, in step (3), by weight, 40 to 50 parts of epoxybutene-modified ethanedithiol, 45 to 65 parts of a double-bond-containing quaternary ammonium compound, 1 to 5 parts of 2,2-dimethoxy-2-phenylacetophenone, and 70 to 80 parts of anhydrous ethanol are used.

[0018] Furthermore, in step (4), by weight, 20 to 30 parts of acrylic acid, 1 to 5 parts of 60% sulfuric acid solution, 50 to 60 parts of tetrahydrofuran, 30 to 40 parts of 5-(hydroxymethyl)benzene-1,2,3-triol, and 1 to 3 parts of azobisisobutyronitrile are used.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] The high-permeability asphalt composition for repair prepared by the present invention improves the bonding strength between asphalt and the road surface and prolongs the service life of asphalt on the basis of achieving high permeability.

[0021] Firstly, 1,2-ethanedithiol and epoxybutene are used to introduce epoxy groups into ethanedithiol through a click reaction, so as to provide epoxy groups for the subsequent preparation of asphalt emulsifiers, form lipophilic groups, and increase the compatibility of the emulsifier with epoxy asphalt. 4-chloro-1-butene is further used to react with triethylamine to introduce double bonds into the generated quaternary ammonium salt to obtain a quaternary ammonium compound containing double bonds. When dissolved in water, a quaternary ammonium cation is formed, which is better combined with water, so that the asphalt can be dispersed in the water phase, and finally a stable emulsion is formed. Modified ethanedithiol and a quaternary ammonium compound containing a double bond are used to prepare a homemade asphalt emulsifier with an epoxy group, which effectively reduces the contact angle of the asphalt composition, reduces the surface tension of the droplets, and increases the wettability of the emulsified asphalt, so that the prepared asphalt composition can flow quickly to the gap with the water phase to repair the gap. When the water in the asphalt composition evaporates and decreases, the epoxy groups in the emulsifier, under the action of the initiator, polymerize with the epoxy groups in the asphalt to form a protective film on the repaired area, further exerting the protective effect of the asphalt composition.

[0022] Secondly, 5-(hydroxymethyl)benzene-1,2,3-triol is dehydrated with acrylic acid to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified acrylate, a large number of phenolic hydroxyl groups are introduced into acrylic acid, and further polymerization is performed to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, which is added to the asphalt emulsion as a curing agent. Under sunlight, the phenolic hydroxyl groups react with the epoxy groups in the asphalt through the action of catalysts and initiators to form a three-dimensional network structure with strong toughness and high stability, which adheres to the surface of the roadbed to form a protective film, effectively blocking the erosion of the roadbed by harmful substances in the air. The stability of the benzene ring skeleton in the polymer makes the entire protective film resistant to aging and effectively extends its service life. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to more clearly illustrate the method provided by the present invention, the following examples are used to describe in detail the various index testing methods of the high-permeability asphalt composition for repair prepared in the following examples are as follows:

[0025] Conventional performance testing: According to the Technical Specifications for Highway Asphalt Pavement Construction (JTG F40-2017), various performance tests were performed on the high-permeability asphalt compositions prepared in Examples 1-3 and Comparative Examples 1-4.

[0026] Example 1

[0027] (1) 20 parts of 1,2-ethanedithiol, 30 parts of epoxybutene, and 1 part of benzophenone were dissolved in 52 parts of anhydrous ethanol, stirred at 50° C., ultraviolet light wavelength of 300 nm, and a stirring rate of 400 rpm under a nitrogen atmosphere for 3 h, and then moved to a drying oven and dried at 60° C. for 4 h to obtain epoxybutene-modified ethanedithiol;

[0028] (2) Add 30 parts of 4-chloro-1-butene and 1 part of potassium iodide to an ice-water bath, stir at a stirring rate of 350 rpm for 30 min, then add triethylamine at a rate of 5 drops / s, stir at 30° C. and a stirring rate of 800 rpm for 3 h. After the reaction is completed, vacuum distillation is performed at 40° C. until only a small amount of liquid remains in the distillation flask. The distillation flask is placed in an ice-water bath and rapidly cooled. The product is filtered under nitrogen protection and rapidly washed with acetone for 6 times. The acetone is recovered, and all the solids are placed in a vacuum dryer at room temperature and dried for 3 h to obtain a quaternary ammonium compound containing a double bond.

[0029] (3) 40 parts of epoxybutene-modified ethanedithiol, 45 parts of double-bond-containing quaternary ammonium compounds, and 1 part of 2,2-dimethoxy-2-phenylacetophenone were dissolved in 70 parts of anhydrous ethanol, stirred at 50°C, ultraviolet light wavelength of 320 nm, and a stirring rate of 800 rpm for 5 h under a nitrogen atmosphere, and then moved to a drying oven and dried at 60°C for 3 h to obtain a homemade asphalt emulsifier;

[0030] (4) 20 parts of acrylic acid and 1 part of 60% sulfuric acid solution were added to 50 parts of tetrahydrofuran, and stirred at 60°C and 300 rpm for 60 min, and then 30 parts of 5-(hydroxymethyl)benzene-1,2,3-triol were added, and stirred at 80°C and 400 r / min for 4 h, and then 1 part of azobisisobutyronitrile was added, and stirred at 70°C and 1000 rpm for 5 h. After cooling, the mixture was filtered with a vacuum filtration pump to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, which was washed with ether 6 times to obtain a purified homemade asphalt curing agent;

[0031] (5) Add 10 parts of homemade asphalt emulsifier to 40 parts of water, stir at 300 rpm at 60°C for 30 minutes, add 50 parts of No. 70 base asphalt, transfer to a colloid mill and grind at 3000 rpm at 135°C for 2 hours, cool to room temperature, continue to add 10 parts of homemade asphalt curing agent, 20 parts of aviation kerosene, 5 parts of calcium chloride, 1 part of potassium persulfate, and 1 part of aluminum chloride, stir at 800 rpm at room temperature for 60 minutes to obtain a high-penetration asphalt composition for repair.

[0032] Example 2

[0033] (1) 25 parts of 1,2-ethanedithiol, 35 parts of epoxybutene, and 2 parts of benzophenone were dissolved in 56 parts of anhydrous ethanol, stirred at 50° C., ultraviolet light wavelength of 300 nm, and a stirring rate of 400 rpm under a nitrogen atmosphere for 3 h, and then moved to a drying oven and dried at 60° C. for 4 h to obtain epoxybutene-modified ethanedithiol;

[0034] (2) Add 35 parts of 4-chloro-1-butene and 3 parts of potassium iodide to an ice-water bath, stir at a stirring rate of 350 rpm for 30 min, then add triethylamine at a rate of 5 drops / s, stir at 30° C. and a stirring rate of 800 rpm for 3 h. After the reaction is completed, vacuum distillation is performed at 40° C. until only a small amount of liquid remains in the distillation flask. The vacuum distillation is stopped, the distillation flask is placed in an ice-water bath and rapidly cooled, filtered under nitrogen protection, and the product is rapidly washed with acetone for 6 times. The acetone is recovered, and all the solids are placed in a vacuum dryer at room temperature and dried for 3 h to obtain a quaternary ammonium compound containing a double bond;

[0035] (3) 55 parts of epoxybutene-modified ethanedithiol, 55 parts of double-bond-containing quaternary ammonium compounds, and 3 parts of 2,2-dimethoxy-2-phenylacetophenone were dissolved in 75 parts of anhydrous ethanol, stirred at 50°C, ultraviolet light wavelength of 320 nm, and a stirring rate of 800 rpm for 5 h under a nitrogen atmosphere, and then moved to a drying oven and dried at 60°C for 3 h to obtain a homemade asphalt emulsifier;

[0036] (4) 25 parts of acrylic acid and 3 parts of 60% sulfuric acid solution were added to 55 parts of tetrahydrofuran, and stirred at 60°C and 300 r / min for 60 min, and then 35 parts of 5-(hydroxymethyl)benzene-1,2,3-triol were added, and stirred at 80°C and 400 rpm for 4 h, and then 2 parts of azobisisobutyronitrile were added, and stirred at 70°C and 1000 rpm for 5 h. After cooling, the mixture was filtered with a vacuum filtration pump to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, which was washed with ether 6 times to obtain a purified homemade asphalt curing agent;

[0037] (5) Add 15 parts of homemade asphalt emulsifier to 45 parts of water, stir at 60°C and 300 rpm for 30 minutes, add 55 parts of No. 70 base asphalt, transfer to a colloid mill and grind at 135°C and 3000 rpm for 2 hours, cool to room temperature, continue to add 15 parts of homemade asphalt curing agent, 25 parts of aviation kerosene, 8 parts of calcium chloride, 3 parts of potassium persulfate, and 2 parts of aluminum chloride, stir at 800 rpm for 60 minutes at room temperature to obtain a high-penetration asphalt composition for repair.

[0038] Example 3

[0039] (1) 30 parts of 1,2-ethanedithiol, 40 parts of epoxybutene, and 3 parts of benzophenone were dissolved in 60 parts of anhydrous ethanol, stirred at 50° C., ultraviolet light wavelength of 300 nm, and a stirring rate of 400 rpm for 3 h under a nitrogen atmosphere, and then moved to a drying oven and dried at 60° C. for 4 h to obtain epoxybutene-modified ethanedithiol;

[0040] (2) Add 40 parts of 4-chloro-1-butene and 5 parts of potassium iodide to an ice-water bath, stir at a stirring rate of 350 rpm for 30 min, then add triethylamine at a rate of 5 drops / s, stir at 30° C. and a stirring rate of 800 rpm for 3 h. After the reaction is completed, vacuum distillation is performed at 40° C. until only a small amount of liquid remains in the distillation flask. The vacuum distillation is stopped, the distillation flask is placed in an ice-water bath and rapidly cooled, filtered under nitrogen protection, and the product is rapidly washed with acetone for 6 times. The acetone is recovered, and all the solids are placed in a vacuum dryer at room temperature and dried for 3 h to obtain a quaternary ammonium compound containing a double bond;

[0041] (3) Take 50 parts of epoxybutene-modified ethanedithiol, 65 parts of double-bond quaternary ammonium compounds, and 5 parts of 2,2-dimethoxy-2-phenylacetophenone and dissolve them in 80 parts of anhydrous ethanol. Stir for 5 hours at 50°C, ultraviolet light wavelength of 320nm, and stirring rate of 800rpm under nitrogen atmosphere. Move to a drying box and dry at 60°C for 3 hours to obtain a homemade asphalt emulsifier.

[0042] (4) 30 parts of acrylic acid and 5 parts of 60% sulfuric acid solution were added to 60 parts of tetrahydrofuran, and stirred at 60°C and 300 rpm for 60 minutes, and then 30 to 40 parts of 5-(hydroxymethyl)benzene-1,2,3-triol were added, and stirred at 80°C and 400 rpm for 4 hours, and then 3 parts of azobisisobutyronitrile were added, and stirred at 70°C and 1000 rpm for 5 hours. After cooling, the mixture was filtered with a vacuum filtration pump to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, which was washed with ether for 6 times to obtain a purified homemade asphalt curing agent;

[0043] (5) Add 20 parts of homemade asphalt emulsifier to 50 parts of water, stir at 300 rpm at 60°C for 30 minutes, add 60 parts of No. 70 base asphalt, transfer to a colloid mill and grind at 3000 rpm at 135°C for 2 hours, cool to room temperature, continue to add 20 parts of homemade asphalt curing agent, 30 parts of aviation kerosene, 10 parts of calcium chloride, 5 parts of potassium persulfate, and 3 parts of aluminum chloride, stir at 800 rpm at room temperature for 60 minutes to obtain a high-penetration asphalt composition for repair.

[0044] Comparative Example 1

[0045] The difference between Comparative Example 1 and Example 2 is that step (1) and step (2) are removed, the homemade asphalt emulsifier in step (5) is replaced by a quaternary ammonium compound containing a double bond, and the remaining steps are the same as Example 2.

[0046] Comparative Example 2

[0047] The difference between Comparative Example 2 and Example 2 is that step (2) and step (3) are removed, the homemade asphalt emulsifier in step (5) is replaced by epoxybutene-modified ethylenedithiol, and the remaining steps are the same as Example 2.

[0048] Comparative Example 3

[0049] The difference between Comparative Example 3 and Example 2 is that step (4) is removed, and the homemade asphalt curing agent is not added in step (5), and the remaining steps are the same as Example 2.

[0050] Comparative Example 4

[0051] The difference between Comparative Example 4 and Example 2 is that in step (1), epoxybutene is replaced with oleic acid, and the remaining steps are the same as Example 2.

[0052] Effect example

[0053] Table 1 below shows the performance analysis results of the high-penetration asphalt compositions for repair using Examples 1 to 3 of the present invention and Comparative Examples 1 to 4.

[0054] Table 1 Test results of high permeability asphalt compositions for repairing of Examples 1 to 3 and Comparative Examples 1 to 4

[0055]

[0056] From the results in Table 1, it can be found that the use of the emulsifier and curing agent prepared by the present invention can effectively enhance the emulsification effect of asphalt. The introduction of epoxy groups into the emulsifier structure enhances the combination effect of the emulsifier and asphalt, improves the emulsification performance of the prepared emulsifier, and the formed quaternary ammonium cation enables the asphalt to be better dispersed in the aqueous phase, ultimately forming a stable emulsion. The prepared curing agent effectively shortens the time used for asphalt curing and obtains higher compressive strength, making the repaired asphalt pavement more resistant to compression and wear, and ultimately extending the service life of the pavement.

[0057] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and scope of the equivalent elements of the claims be included in the invention. Any marking in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-permeability asphalt composition for repair, characterized in that: The high-permeability asphalt composition for repair comprises base asphalt, water, a homemade asphalt emulsifier, a homemade asphalt curing agent, a penetrant, a stabilizer, an initiator, and a catalyst.

2. A high-penetration asphalt composition for repair according to claim 1, characterized in that: The homemade asphalt emulsifier uses 1,2-ethanedithiol, epoxybutene, and dibenzophenone to obtain epoxybutene-modified ethanedithiol through ultraviolet curing reaction, uses 4-chloro-1-butene and triethylamine to react to obtain a quaternary ammonium compound containing a double bond, and finally obtains the homemade asphalt emulsifier through an ultraviolet curing click reaction between epoxybutene-modified ethanedithiol and the quaternary ammonium compound containing a double bond.

3. A high-penetration asphalt composition for repair according to claim 2, characterized in that: The self-made asphalt curing agent is prepared by dehydrating 5-(hydroxymethyl)benzene-1,2,3-triol and acrylic acid to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified acrylate, and further polyadding to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate.

4. A high-penetration asphalt composition for repair according to claim 3, characterized in that: The asphalt is No. 70 base asphalt, the penetrant is one or more of aviation kerosene, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and the stabilizer is one or more of calcium chloride, ammonium chloride, and sodium carboxymethyl cellulose.

5. A high-penetration asphalt composition for repair according to claim 4, characterized in that: The initiator is one or more of azobisisobutyronitrile, benzoyl peroxide, and potassium persulfate, and the catalyst is one or more of aluminum chloride, zinc chloride, and ferric chloride.

6. A method for preparing a high-permeability asphalt composition for repair, characterized in that: The method comprises the following preparation steps: (1) dissolving 1,2-ethanedithiol, epoxybutene, and benzophenone in anhydrous ethanol, stirring for 2 to 4 hours at 40 to 60° C., ultraviolet light wavelength of 250 to 360 nm, and a stirring rate of 200 to 400 rpm under a nitrogen atmosphere, and then transferring the mixture to a drying oven, drying the mixture at 50 to 60° C. for 2 to 4 hours to obtain epoxybutene-modified ethanedithiol; (2) Add 4-chloro-1-butene and potassium iodide to an ice-water bath, stir at a stirring rate of 300-400 rpm for 20-40 min, then add triethylamine at a rate of 3-6 drops / s, stir at 20-30° C. and a stirring rate of 600-1000 rpm for 2-3 h. After the reaction is completed, perform vacuum distillation at 30-40° C. until only a small amount of liquid remains in the distillation flask, stop the vacuum distillation, place the distillation flask in an ice-water bath and quickly cool it, filter under nitrogen protection, and quickly wash the product with acetone for 3-6 times, recover the acetone, and place all the solids in a vacuum dryer at room temperature and dry them for 2-4 h to obtain a quaternary ammonium compound containing a double bond; (3) epoxybutene-modified ethanedithiol, a quaternary ammonium compound containing a double bond, and 2,2-dimethoxy-2-phenylacetophenone are dissolved in anhydrous ethanol, stirred at 30-50° C., an ultraviolet light wavelength of 300-350 nm, and a stirring rate of 600-800 rpm for 3-6 h under a nitrogen atmosphere, and then moved to a drying oven and dried at 50-60° C. for 2-4 h to obtain a homemade asphalt emulsifier; (4) Add acrylic acid and 60% sulfuric acid solution to tetrahydrofuran, stir at 60-80° C. and 300-400 rpm for 50-60 min, continue to add 5-(hydroxymethyl)benzene-1,2,3-triol, stir at 60-80° C. and 300-400 rpm for 2-4 h, continue to add azobisisobutyronitrile, stir at 50-70° C. and 600-1000 rpm for 4-6 h, cool, filter with a vacuum filtration pump to obtain 5-(hydroxymethyl)benzene-1,2,3-triol modified polyacrylate, wash with ether 3-6 times to obtain a purified homemade asphalt curing agent; (5) Add 10 to 20 parts of homemade asphalt emulsifier to 40 to 50 parts of water, stir at 40 to 60°C at 200 to 300 rpm for 20 to 30 minutes, add 50 to 60 parts of base asphalt, transfer to a colloid mill and grind at 130 to 150°C at 2000 to 3000 rpm for 1 to 2 hours, cool to room temperature, continue to add 10 to 20 parts of homemade asphalt curing agent, 20 to 30 parts of penetrant, 5 to 10 parts of stabilizer, 1 to 5 parts of initiator, and 1 to 3 parts of catalyst, stir at 500 to 800 rpm for 50 to 60 minutes at room temperature to obtain a high-penetration asphalt composition for repair.

7. The method for preparing a high-permeability asphalt composition for repair according to claim 6, characterized in that: In step (1), the following are calculated by weight: 20 to 30 parts of 1,2-ethanedithiol, 30 to 40 parts of epoxybutene, 1 to 3 parts of benzophenone, and 52 to 60 parts of anhydrous ethanol.

8. The method for preparing a high-permeability asphalt composition for repair according to claim 6, characterized in that: In step (2), by weight, 30 to 40 parts of 4-chloro-1-butene, 1 to 5 parts of potassium iodide, and 30 to 40 parts of triethylamine are used.

9. The method for preparing a high-permeability asphalt composition for repair according to claim 6, characterized in that: In step (3), by weight, 40 to 50 parts of epoxybutene-modified ethanedithiol, 45 to 65 parts of a double-bond-containing quaternary ammonium compound, 1 to 5 parts of 2,2-dimethoxy-2-phenylacetophenone, and 70 to 80 parts of anhydrous ethanol are used.

10. The method for preparing a high-permeability asphalt composition for repair according to claim 6, characterized in that: In step (4), the following are added by weight: 20-30 parts of acrylic acid, 1-5 parts of 60% sulfuric acid solution, 50-60 parts of tetrahydrofuran, 30-40 parts of 5-(hydroxymethyl)benzene-1,2,3-triol, and 1-3 parts of azobisisobutyronitrile.

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