An asphalt pavement self-melting ice coating material, a preparation method and application thereof

Abstract

The application discloses a self-ice-melting coating material for asphalt pavement and a preparation method and application thereof. The self-ice-melting coating material for asphalt pavement comprises the following components in percentage by weight: 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of pore-forming agent, 5-10 parts of sodium hydroxylsilicate stone powder, 4-9 parts of fish scale stone powder, 3-6 parts of functional synergist and 2-4 parts of performance modifier. The road coating has good self-ice-melting and asphalt pavement temperature reduction preventing functions at low temperature, excellent road performance, good economic and social benefits, a corrosion prevention service life of 4-6 years after one-time spraying construction, a maximum surface temperature increase of 6 DEG C on the road surface and a maximum lower part temperature increase of 8 DEG C on the road surface through absorption of solar energy and blocking of asphalt pavement heat loss.

Description

Technical Field

[0001] This invention relates to the field of road coating materials technology, and in particular to a self-melting ice coating material for asphalt pavement, its preparation method, and its application. Background Technology

[0002] The information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] In my country's road engineering, asphalt pavement dominates the road structure due to its advantages such as high smoothness and good driving comfort. However, in the low-temperature environment of winter, asphalt pavement faces two major challenges: First, road ice accumulation directly undermines traffic safety and efficiency. The ice film significantly reduces the road surface adhesion coefficient, leading to longer vehicle braking distances and reduced handling stability. Relevant data shows that approximately 35% of major traffic accidents in winter are directly related to road ice accumulation. Simultaneously, vehicles need to slow down, significantly reducing road traffic efficiency. Second, low temperatures can damage the internal structure of asphalt concrete, reducing its load-bearing capacity and leading to freeze-thaw cracks, spalling, and other defects, shortening the pavement's service life and increasing maintenance costs. These problems not only affect smooth transportation but also constrain public travel safety, livelihood security, and the goal of building environmentally friendly roads.

[0004] The current mainstream solution for winter asphalt pavement distress in the industry is anti-icing and anti-skid coating materials, which are designed to reduce the damage caused by icing by increasing the road surface friction coefficient. However, these materials have significant technical limitations: First, their function is limited. Although they can assist in ice melting and anti-skid to some extent, their weak thermal insulation performance makes them unable to effectively prevent the road surface temperature from continuously decreasing, and they cannot simultaneously alleviate the freeze-thaw damage to the asphalt concrete structure caused by low temperatures. Second, they lack economy and durability. Existing anti-icing and anti-skid coatings generally suffer from high raw material costs and complex construction and maintenance. Moreover, after long-term exposure to the road surface, they are susceptible to wear from vehicle loads, erosion from rain and snow, and the adhesion of pollutants, resulting in rapid performance degradation and requiring frequent recoating, further increasing the overall application cost. Third, they have poor environmental adaptability. Some material components lack compatibility with the road ecology, and their performance is easily affected by external environmental factors, making it difficult for them to maintain stable performance in different climatic regions over a long period of time.

[0005] Therefore, there is still an urgent need in this field to develop a new type of road coating material that not only has the ability to efficiently and persistently melt ice and inhibit the drop in road surface temperature, but also has good road performance and environmental friendliness to meet the development needs of modern transportation infrastructure. Summary of the Invention

[0006] In view of this, the present invention provides an asphalt pavement self-melting ice coating material, its preparation method and application. The road coating provided by the present invention has good self-melting ice and anti-temperature reduction functions at low temperatures, and has excellent road performance, with good economic and social benefits.

[0007] In a first aspect, the present invention provides an asphalt pavement self-melting ice coating material, comprising the following components by weight: 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of pore-forming agent, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

[0008] Preferably, the polymerizing monomer is at least one selected from divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, and is more preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The porogen is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

[0009] Preferably, the functional synergist is selected from at least one of polyisocyanurate and polyimide, and more preferably polyisocyanurate.

[0010] Preferably, the performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, polyvinyl alcohol, and polyethylene glycol, with glucose gel being the most preferred.

[0011] Secondly, the present invention provides a method for preparing the asphalt pavement self-melting ice coating material described in the first aspect, comprising the following steps: (1) Mix the polymer monomer, initiator and porogen, let stand, and then add fish scale stone powder and water-soluble sodium silicate stone powder in sequence and mix. (2) Add the functional enhancer, performance improver and sodium hydroxysilicate powder to the composition obtained in step (1) and stir to obtain the final product.

[0012] Preferably, the ratio of sodium hydroxysilicate powder in step (1) to sodium hydroxysilicate powder in step (2) is 1:1-1.5, preferably 1:1; In step (1), let it stand for 1.5-3 hours; In step (2), the stirring speed is 300-800 rpm and the stirring time is 40-60 min.

[0013] Preferably, the composition includes 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of porogen, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

[0014] Preferably, the polymerizing monomer is at least one selected from divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, and is more preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The porogen is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

[0015] Preferably, the functional synergist is selected from at least one of polyisocyanurate and polyimide, and more preferably polyisocyanurate; The performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, and polyethylene glycol, preferably glucose gel.

[0016] Thirdly, the present invention provides the application of the asphalt pavement self-melting ice coating material described in the first aspect or the asphalt pavement self-melting ice coating material prepared by the preparation method described in the second aspect in newly built or existing pavements.

[0017] Compared with the prior art, the present invention has achieved the following beneficial effects: (1) The self-melting ice coating material for asphalt pavement provided by this invention, through the specific selection and synergistic ratio of each functional component, has good self-melting ice and anti-temperature reduction functions and road performance of asphalt pavement. Among them, sodium hydroxysilicate stone powder and fish scale stone powder are two core components that resist temperature reduction. Both of them have excellent heat barrier and environmental heat absorption capabilities. They can maintain the pavement temperature by reducing heat loss from asphalt pavement and capturing solar energy. At the same time, functional synergists such as polyisocyanurate form a synergistic effect with the above two types of stone powder. The functional synergists can enhance the thermal stability and heat barrier efficiency of the stone powder through intermolecular interactions. When this coating is applied to the asphalt pavement, it can effectively block the heat loss from the pavement to the cold environment, significantly inhibit the reduction of pavement temperature, and fundamentally alleviate the ice formation on the pavement and freeze-thaw damage of asphalt concrete. In addition, the polymer matrix formed by cross-linking of polymer monomers and initiators, combined with the gap filling effect of pore-forming agents, can ensure that the anti-temperature reduction components and functional synergists are uniformly dispersed and firmly fixed in the coating, avoiding functional attenuation due to component agglomeration or detachment, and further ensuring the long-term stable performance of dual functions. Performance modifiers such as glucose gel can improve the overall basic properties of materials.

[0018] (2) The asphalt pavement self-melting ice coating material provided by the present invention has a corrosion protection life of 4-6 years after one spraying construction. Through the absorption of solar energy and the blocking effect of heat loss of asphalt pavement, the surface temperature of the pavement can be increased by up to 6°C and the temperature of the lower part of the pavement can be increased by up to 8°C.

[0019] (3) In the preparation method of the present invention, sodium hydrosilicate stone powder is added in two stages to avoid uneven distribution of stone powder and local agglomeration, which increases the brittleness of the coating. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the temperature sensor arrangement in the sample. 1-Standard Marshall specimen for asphalt pavement; 2-Water film; 3-Thermocouple probe; 4-Tape; 5-Digital thermometer 1; 6-Digital thermometer. Detailed Implementation

[0021] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] This invention provides a self-melting ice coating material for asphalt pavement, comprising the following components by weight: 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of pore-forming agent, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

[0023] The formulation range set in this invention ensures optimal synergistic effects among the components. The polymeric monomers serve as the matrix material, providing the structural framework of the coating; the initiator promotes the polymerization reaction; the pore-forming agent regulates the coating's pore structure; sodium hydroxysilicate powder and fish scale stone powder, as core functional components, are responsible for blocking heat loss and absorbing solar energy; the functional enhancer strengthens the thermal properties of the stone powder; and the performance modifier improves overall processability and durability. Exceeding this range may lead to an imbalance in the proportions of the components, affecting the coating material's performance. For example, excessively high monomer content may make the coating too brittle, reducing its flexibility and adhesion; excessively low content may prevent the formation of a sufficiently stable polymer matrix, affecting the overall structural strength of the coating. Excessively high initiator content may lead to an overly vigorous reaction, producing defects such as bubbles; excessively low content may result in incomplete reactions, affecting the coating's performance. Insufficient sodium hydroxysilicate powder content results in inadequate insulation, failing to effectively prevent temperature drops; excessively high content increases the coating's brittleness, making it prone to cracking and increasing costs. If the content of fish scale stone powder is too low, the synergistic insulation effect will be weakened; if the content is too high, the dispersibility will be poor, and it will easily agglomerate, affecting the uniformity of the coating. If the content of functional synergist is too low, the reinforcing effect of the stone powder will be insufficient; if the content is too high, it may lead to excessive cross-linking, affecting the flexibility of the coating. If the content of performance modifier is too low, the flexibility and workability of the coating will be poor; if the content is too high, it may introduce too many hydrophilic groups, reducing water resistance.

[0024] Furthermore, the sodium silicate hydrate powder in this invention is a sodium silicate-based inorganic heat-insulating powder containing hydroxyl groups (-OH) and water of crystallization. It is a known existing material in the art, readily available commercially, and can also be prepared using conventional techniques. For example, it can be produced from natural sodium silicate hydrate (NaHSi2O4(OH)2). It is prepared by mechanical crushing and grinding (2H2O), or by hydroxylation and hydration modification of industrial sodium silicate. The powder is micron-sized (preferably 10-50μm), has low thermal conductivity and high thermal stability, and contains active hydroxyl groups on its surface, which can form intermolecular interactions with functional synergists. Its core function is to block heat transfer and inhibit the decrease of road surface temperature.

[0025] Furthermore, the fish-scale stone powder described herein is named based on the functional description of the scaly, layered crystal structure of the powder. Its core is an aluminosilicate-based inorganic solar energy absorbing powder, a known existing material in the field. It can be directly purchased commercially or prepared using conventional techniques. It can be obtained from natural scaly minerals such as mica, talc, and kaolin through purification, grinding, and modification, or from artificially synthesized scaly aluminosilicate powders. This powder is micron-sized (preferably 5-40 μm) and possesses excellent solar thermal conversion efficiency, heat storage capacity, and auxiliary thermal barrier properties. Its surface contains active groups that can synergize with sodium silicate powder and polyisocyanurate. It is a commercially available functional inorganic filler for conventional road surface coatings. Its core function is to capture and convert solar energy into heat energy and store road surface heat. Combined with sodium silicate powder, it achieves a dual effect of "heat absorption + heat preservation" to suppress temperature drop.

[0026] In this invention, the polymerizing monomer is at least one selected from divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The porogen is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

[0027] This invention utilizes the free radical reaction between monomers and an initiator to form a three-dimensional network polymer matrix, firmly encapsulating and fixing all functional components to prevent component detachment. Divinylbenzene, as a monomer, possesses bifunctional groups and can form a cross-linked network, enhancing the coating's strength and durability. Benzoyl peroxide, as an initiator, decomposes moderately at low temperatures, ensuring a stable polymerization reaction. Ethyl acetate, as a pore-forming agent, can create uniform pores within the coating.

[0028] In this invention, the functional synergist is selected from at least one of polyisocyanurate and polyimide, preferably polyisocyanurate. Polyisocyanurate can enhance the thermal stability and thermal barrier efficiency of sodium silicate hydrate powder and ichthyol powder through intermolecular interactions, forming a synergistic effect. Without this component, the thermal stability and thermal barrier efficiency of sodium silicate hydrate powder and ichthyol powder will decrease, the coating's ability to prevent road surface temperature from dropping will weaken, and the self-melting ice function will also be affected.

[0029] In this invention, the performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, polyvinyl alcohol, and polyethylene glycol, preferably glucose gel. Glucose gel can improve the overall basic properties of the material. Without this component, the overall performance of the coating may deteriorate; for example, flexibility, adhesion, and durability may be affected, leading to problems such as cracking and peeling during use, and shortening the coating's service life.

[0030] The present invention also provides a method for preparing the above-mentioned asphalt pavement self-melting ice coating material, comprising the following steps: (1) Mix the polymer monomer, initiator and porogen, let stand, and then add fish scale stone powder and water-soluble sodium silicate stone powder in sequence and mix. (2) Add the functional enhancer, performance improver and sodium hydroxysilicate powder to the composition obtained in step (1) and stir to obtain the final product.

[0031] This invention adds sodium hydroxysilicate powder in two stages to avoid agglomeration caused by adding it all at once, ensuring uniform dispersion and preventing localized brittleness of the coating.

[0032] In this invention, the ratio of sodium hydroxysilicate powder in step (1) to sodium hydroxysilicate powder in step (2) is 1:1-1.5, preferably 1:1; In step (1), let it stand for 1.5-3 hours; In step (2), the stirring speed is 300-800 rpm and the stirring time is 40-60 min.

[0033] In this invention, there are 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of pore-forming agent, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale stone powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

[0034] In this invention, the polymerizing monomer is at least one selected from divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The porogen is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

[0035] In this invention, the functional synergist is selected from at least one of polyisocyanurate and polyimide, preferably polyisocyanurate; The performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, and polyethylene glycol, preferably glucose gel.

[0036] This invention provides the application of the self-melting ice coating material for asphalt pavement prepared by the above-mentioned method in newly constructed or existing pavements.

[0037] The technical solution of the present invention will be further described below with reference to specific embodiments. The present invention does not impose any special restrictions on the source of reagents used in the following embodiments; commercially available products well known to those skilled in the art can be used.

[0038] Example 1 This embodiment provides a self-melting ice coating material for asphalt pavement and its preparation method.

[0039] (1) Use a high-speed disperser to pre-disperse 63 parts of divinylbenzene monomer, 16 parts of benzoyl peroxide and 8 parts of ethyl acetate. After the three materials are fully mixed and placed for 2 hours, add 7 parts of fish scale stone powder and 4 parts of water-hydroxyl silicate stone powder in sequence, and disperse and mix them fully with a high-speed disperser to become a semi-finished product of glue. (2) Add 4 parts of polyisocyanurate, 3 parts of glucose gel and 4 parts of sodium hydroxysilicate powder to the composition obtained in step (1), grind and stir with a vertical sand mill at 600 rpm for 50 minutes to obtain the final product.

[0040] Example 2 This embodiment provides a self-melting ice coating material for asphalt pavement and its preparation method.

[0041] (1) Use a high-speed disperser to pre-disperse 65 parts of divinylbenzene monomer, 13 parts of benzoyl peroxide and 6 parts of ethyl acetate. After the three materials are fully mixed and placed for 2 hours, add 5 parts of fish scale stone powder and 3 parts of water-hydroxyl silicate stone powder in sequence, and disperse and mix them fully with a high-speed disperser to become a semi-finished product of glue. (2) Add 3 parts of polyisocyanurate, 2 parts of glucose gel and 3 parts of sodium hydroxysilicate powder to the composition obtained in step (1), grind and stir with a vertical sand mill at 400 rpm for 55 minutes to obtain the final product.

[0042] Example 3 This embodiment provides a self-melting ice coating material for asphalt pavement and its preparation method.

[0043] (1) Use a high-speed disperser to pre-disperse 57 parts of divinylbenzene monomer, 16 parts of benzoyl peroxide and 8 parts of ethyl acetate. After the three materials are fully mixed and placed for 2 hours, add 6 parts of fish scale stone powder and 3 parts of sodium hydroxysilicate stone powder in sequence, and disperse and mix them fully with a high-speed disperser to become a semi-finished product of the paste. (2) Add 4 parts of polyisocyanurate, 3 parts of glucose gel and 3 parts of sodium hydroxysilicate powder to the composition obtained in step (1), grind and stir with a vertical sand mill at 700 rpm for 40 minutes to obtain the final product.

[0044] Comparative Example 1 The difference between this comparative example and Example 1 is that this comparative example does not add sodium hydroxysilicate powder, while all other conditions are the same.

[0045] Comparative Example 2 The difference between this comparative example and Example 1 is that no fish scale powder was added in this comparative example, while all other conditions were the same.

[0046] Comparative Example 3 The difference between this comparative example and Example 1 is that no polyisocyanurate was added in this comparative example, while all other conditions were the same.

[0047] Comparative Example 4 The difference between this comparative example and Example 1 is that no glucose gel was added in this comparative example, while all other conditions were the same.

[0048] Comparative Example 5 The difference between this comparative example and Example 1 is that no polymeric monomer (divinylbenzene) was added, while all other conditions were the same.

[0049] The resulting mixture was observed to be a heterogeneous paste-like slurry, unable to form a continuous, stable liquid system. After standing for 12 hours, some powder settled, the liquid components separated, and a curing reaction failed to form a coating. Because a coating film with adhesion and integrity could not be formed, it could not be applied to the surface of Marshall specimens for subsequent performance testing. This result indicates that the polymeric monomer is an essential component for forming the structural framework of the coating of this invention; without this component, the coating material cannot be obtained.

[0050] Comparative Example 6 The difference between this comparative example and Example 1 is that no initiator (benzoyl peroxide) was added, while all other conditions were the same.

[0051] The resulting mixture was a homogeneous liquid slurry. When applied to a substrate and allowed to stand for 24 hours or longer, the slurry remained in a liquid or high-viscosity flow state, failing to undergo a curing reaction to form a solid coating with sufficient strength. Because it could not cure, subsequent performance testing was impossible. This result indicates that the initiator is a key component for starting the polymerization reaction and enabling the coating to cure; without this component, the coating material cannot be obtained.

[0052] Comparative Example 7 The difference between this comparative example and Example 1 is that ethyl acetate was not added in this comparative example, while all other conditions were the same.

[0053] Comparative Example 8 The difference between this comparative example and Example 1 is that this comparative example does not contain sodium hydroxysilicate powder, fish scale powder and polyisocyanurate, while all other conditions are the same.

[0054] Comparative Example 9 The difference between this comparative example and Example 1 is that in step (1), the sodium hydroxysilicate powder was added all at once, while all other conditions were the same.

[0055] The following tests were conducted on the coating materials of Examples 1-3 and Comparative Examples 1-9: (1) Standard asphalt pavement Marshall specimens were prepared according to the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTGE20-2011). The thickness of the Marshall specimens was 5 cm. Figure 1 As shown, temperature sensors 1 and 2 are respectively attached to the surface and bottom of the Marshall specimen with tape.

[0056] (2) According to 0.5kg / m 2 Apply the coating material developed in Example 1 evenly to the surface of a standard Marshall specimen of asphalt pavement, lay it flat in a ventilated place, and let it air dry for 12 hours.

[0057] (3) Select a place with good visibility, ventilation and sunlight, and clean it thoroughly. Lay a layer of silt at the bottom of the standard Marshall specimen and surround it with clay to simulate the layout of a real road surface.

[0058] (4) Select 9:00 AM to 4:00 PM as the test time, read the surface and lower temperature every hour, and compile and summarize the data.

[0059] Table 1. Surface Temperature Data Acquisition for Outdoor Temperature Measurement

[0060] Table 2. Bottom Temperature Data Collection for Outdoor Temperature Measurements

[0061] According to Tables 1 and 2, the self-melting ice coating of the present invention increases the surface temperature of the road surface by up to 6°C and the temperature of the lower part of the road surface by 8°C, indicating that the coating of the present invention has good self-melting ice and prevents the temperature of asphalt pavement from dropping.

[0062] Based on the requirements for texture depth in the "Highway Engineering Quality Inspection and Evaluation Standard" (JTGF801-2012), the anti-skid performance of the road coating of this invention based on texture depth was studied and tested. The results of the anti-skid performance study of the road coating based on texture depth in Example 1 are shown in Table 3.

[0063] Table 3. Experimental Results of Antiskid Performance Study of Road Coating Based on Texture Depth in Example 1

[0064] As shown in Table 3, after applying the self-melting ice coating of the present invention to the surface of the test plate, the surface texture depth is reduced, but it is greater than the standard value of 0.55, which meets the requirements of the standard "Highway Engineering Quality Inspection and Evaluation Standard" (JTGF801-2012) for texture depth.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-melting ice coating material for asphalt pavement, characterized in that, It includes the following components by weight: 57-68 parts of polymeric monomer, 13-19 parts of initiator, 6-11 parts of porogen, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

2. The asphalt pavement self-melting ice coating material as described in claim 1, characterized in that, The polymer monomer is selected from at least one of divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The pore-forming agent is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

3. The asphalt pavement self-melting ice coating material as described in claim 1, characterized in that, The functional enhancer is selected from at least one of polyisocyanurate and polyimide, preferably polyisocyanurate.

4. The asphalt pavement self-melting ice coating material as described in claim 1, characterized in that, The performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, and polyethylene glycol, preferably glucose gel.

5. The method for preparing the asphalt pavement self-melting ice coating material according to any one of claims 1-4, characterized in that, Includes the following steps: (1) Mix the polymer monomer, initiator and porogen, let stand, and then add fish scale stone powder and water-soluble sodium silicate stone powder in sequence and mix. (2) Add the functional enhancer, performance improver and sodium hydroxysilicate powder to the composition obtained in step (1) and stir to obtain the final product.

6. The preparation method according to claim 5, characterized in that, The ratio of sodium hydroxysilicate powder in step (1) to sodium hydroxysilicate powder in step (2) is 1:1-1.5, preferably 1:1; In step (1), let it stand for 1.5-3 hours; In step (2), the stirring speed is 300-800 rpm and the stirring time is 40-60 min.

7. The preparation method according to claim 5, characterized in that, 57-68 parts of polymer monomer, 13-19 parts of initiator, 6-11 parts of porogen, 5-10 parts of sodium hydroxysilicate powder, 4-9 parts of fish scale stone powder, 3-6 parts of functional enhancer, and 2-4 parts of performance improver.

8. The preparation method according to claim 5, characterized in that, The polymer monomer is selected from at least one of divinylbenzene, divinyltoluene, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, and pentaerythritol triacrylate, preferably divinylbenzene; The initiator is selected from at least one of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, azobisisobutyronitrile, and azobisisoheptanenitrile, preferably benzoyl peroxide; The pore-forming agent is selected from at least one of ethyl acetate, toluene, xylene, n-heptane, cyclohexane, methanol, and ethanol, preferably ethyl acetate.

9. The preparation method according to claim 5, characterized in that, The functional synergist is selected from at least one of polyisocyanurate and polyimide, preferably polyisocyanurate; The performance improver is selected from at least one of glucose gel, xanthan gum, sodium carboxymethyl cellulose, and polyethylene glycol, preferably glucose gel.

10. The application of the asphalt pavement self-melting ice coating material as described in any one of claims 1-4 or the asphalt pavement self-melting ice coating material prepared by the preparation method as described in any one of claims 5-9 in newly constructed or existing pavements.

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