Core-shell structure anti-sticking asphalt cold patch material and preparation method thereof

Abstract

The invention provides an anti-sticking asphalt cold patch material with a core-shell structure and a preparation method thereof.The anti-sticking asphalt cold patch material with the core-shell structure sequentially comprises an inner core, a bonding layer and an anti-sticking layer from inside to outside, the bonding layer comprises resin and asphalt, and the anti-sticking layer comprises a fatty acid compound; the fatty acid compound is at least one of long-chain unsaturated fatty acid, long-chain saturated fatty acid or ester derivatives thereof; the fatty acid compound comprises a non-polar long chain with the alkyl chain length of C12-C18 and a polar group, and the polar group comprises any one of an ester group and a carboxyl group. The anti-sticking asphalt cold patch material with the core-shell structure does not need compaction equipment and heating equipment during construction, an anti-sticking layer formed by the fatty acid compound can be destroyed only by means of a driving load, so that a cementing material in the bonding layer flows again and is bonded with each other, and meanwhile, stable structural strength is formed by virtue of an embedding and extruding effect among aggregates.

Description

Technical Field

[0001] This invention relates to the field of road engineering materials technology, and in particular to a core-shell structure anti-sticking asphalt cold patching material and its preparation method. Background Technology

[0002] Asphalt pavement has become the main structural form of modern highways and urban roads due to its excellent driving comfort, low noise, good roughness, and ease of maintenance. However, asphalt pavement inevitably develops defects such as cracks, potholes, and loosening during its service life. If these defects are not repaired in time, they will further accelerate the damage to the pavement structure and shorten its service life.

[0003] While traditional hot-mix asphalt repair materials possess high mechanical strength, their application involves high temperatures, high energy consumption, and complex procedures, making them unsuitable for sudden, small-scale, or low-temperature repairs. Therefore, cold-mix asphalt repair materials, which can be stored, transported, and applied quickly at ambient temperatures, are gradually becoming an important direction for road maintenance. Currently, most commercially available cold-mix asphalt repair materials use solvent-diluted asphalt as the main binder, reducing asphalt viscosity by adding organic solvents such as mineral oil, diesel oil, or kerosene to improve workability. However, these organic solvents are highly volatile, easily releasing volatile organic compounds (VOCs) during production, transportation, and application, posing hazards to the construction environment and human health. They also easily cause clumping or hardening of the cold-mix material during storage, affecting its long-term stability and repair effectiveness. Furthermore, residual mineral oil solvents reduce the adhesion between the repair layer and the original pavement, leading to insufficient durability of the repaired road surface. To address these issues, scholars and engineers both domestically and internationally have begun to explore the development of solvent-free or low-solvent cold-mix materials. Some studies have used emulsified asphalt systems to replace solvent dilution, but its demulsification and curing process is greatly affected by temperature and humidity, resulting in insufficient early strength. Other studies have attempted to use epoxy resin systems to improve the adhesion and durability of cold patch materials, but this system is not only expensive, but also relies on chemical reactions for curing, making it difficult to re-treat or remove after repair.

[0004] Therefore, how to develop solvent-free, high-strength, and long-term storable cold patch materials for asphalt pavement while ensuring convenient construction has become a key technical challenge in the field of road maintenance. Summary of the Invention

[0005] In view of this, the present invention proposes a core-shell structured anti-sticking asphalt cold patching material and its preparation method. This core-shell structured anti-sticking asphalt cold patching material has a multi-layered structure: a core comprising aggregates, an outer layer of resin-asphalt binder forming a bonding layer, and an outermost anti-sticking layer formed by fatty acid compounds. The fatty acid compounds adsorb onto the surface of the bonding layer through polar groups, interacting with the polar groups in the resin-asphalt binder to form an oriented molecular film. Their non-polar long chains extend outwards, constructing a low-surface-energy anti-sticking layer that prevents direct contact between particles and reduces intermolecular adhesion, thus allowing the hot-mix asphalt mixture to be stored for extended periods without clumping. However, after paving, the anti-sticking layer formed by the fatty acid compounds can be destroyed by traffic loads, causing the resin-asphalt binder in the bonding layer to flow and bond again, while simultaneously forming a stable structural strength through the interlocking action between aggregates.

[0006] The technical solution of this invention is implemented as follows: In a first aspect, the present invention provides a core-shell structured non-sticking asphalt cold patching material, which comprises, from the inside out, a core, an adhesive layer and a non-sticking layer, wherein the adhesive layer comprises resin and asphalt, and the non-sticking layer comprises a fatty acid compound. The fatty acid compound is one or more of long-chain unsaturated fatty acids, long-chain saturated fatty acids and their ester derivatives; The fatty acid compound comprises a nonpolar long chain with an alkyl chain length of C12-C18 and a polar group, wherein the polar group comprises either an ester group or a carboxyl group.

[0007] Fatty acid compounds adsorb onto the surface of the binder layer through polar groups, interacting with the polar groups in the resin-asphalt binder to form an oriented molecular film. Their non-polar long chains extend outwards, creating a low-surface-energy anti-sticking layer that prevents direct contact between particles and reduces intermolecular adhesion, allowing hot-mix asphalt mixtures to be stored for extended periods without clumping. However, after paving, the anti-sticking layer formed by fatty acid compounds can be destroyed by traffic loads, causing the binder in the binder layer to flow and bond together again. Simultaneously, the interlocking action between aggregates forms a stable structural strength.

[0008] Based on the above technical solutions, the fatty acid compound further includes any one of oleic acid, stearic acid, methyl oleate, methyl stearate and methyl myristate.

[0009] The polar groups of the fatty acid compound need to be strong enough to achieve adsorption on the surface of the adhesive layer, but not too strong, so as not to affect the crackability of the anti-stick layer after paving; the non-polar long chain portion needs to be long enough (C12-C18) to construct a low surface energy and flexible molecular layer to achieve lubrication and anti-sticking effects between particles.

[0010] The iodine value of the fatty acid compounds is between 50-110 g I2 / 100 g to balance flexibility and stability; the saponification value of the ester derivatives of the fatty acid compounds is between 190-210 mg KOH / g to ensure that the chain length is appropriate and can form a uniform and effective anti-sticking molecular film.

[0011] Based on the above technical solutions, further, by weight, it includes 10-25 parts resin, 100 parts asphalt, and 10-40 parts fatty acid compound.

[0012] When the amount is excessive, the fatty acid compounds form an excessively thick anti-sticking layer in the cold patch, which is difficult to break under external force, making it impossible for the adhesive to re-bond, resulting in the inability to guarantee the strength and compactness of the cold patch in the later stage. When the amount is insufficient, the fatty acid compounds cannot form a continuous and uniform anti-sticking layer on the surface of the adhesive layer. The anti-sticking layer is incomplete, and the cold patch is prone to hardening during storage, which limits its workability and makes it difficult to achieve normal construction at room temperature (25°C).

[0013] Based on the above technical solutions, the asphalt further includes styrene-butadiene-styrene (SBS) modified asphalt.

[0014] Based on the above technical solutions, the resin further includes any one of natural rubber resin, butyl rubber resin, and terpene resin.

[0015] Furthermore, based on the above technical solutions, the resin is a natural rubber resin.

[0016] Natural rubber resin has good pressure-sensitive properties and adhesion.

[0017] Furthermore, based on the above technical solutions, the core includes aggregate.

[0018] Based on the above technical solutions, the particle size of the aggregate is further specified to be 0~9.5mm.

[0019] Based on the above technical solutions, the aggregate further includes any one of basalt aggregate, limestone aggregate, recycled waste asphalt pavement material, and steel slag.

[0020] Based on the above technical solutions, it further includes a reinforcing agent, which includes one or more of cement and fly ash, with the purpose of enhancing the formation strength of cold patching material in rainy environments.

[0021] Based on the above technical solutions, the particle size of the reinforcing agent is further specified to be between 1 and 50 μm.

[0022] Based on the above technical solutions, further, by weight, it also includes 2200-2500 parts of aggregate and 1-3 parts of reinforcing agent.

[0023] Secondly, the present invention also provides a method for preparing a core-shell structure anti-adhesive asphalt cold patching material, comprising the following steps: S1, mixing resin and asphalt to obtain a binder; S2. Mix the binder, reinforcing agent and aggregate evenly, so that the binder coats the surface of the aggregate to obtain a mixture; S3. Coat the surface of the mixture with fatty acid compounds, and after cooling, obtain the core-shell structured non-sticky asphalt cold patching material.

[0024] Based on the above technical solution, the mixing temperature in step S1 is further specified as 180℃~260℃.

[0025] Based on the above technical solution, the mixing temperature in step S2 is further set at 170℃~180℃.

[0026] Compared with the prior art, the present invention has the following beneficial effects: (1) The core-shell structured anti-sticking cold-mix asphalt material of the present invention forms an oriented molecular film by adsorbing polar groups of fatty acid compounds onto the surface of the adhesive layer through polar groups. Its non-polar long chain portion extends outward to construct a low surface energy anti-sticking layer, which prevents direct contact between particles and reduces intermolecular adhesion, thereby enabling the hot-mix asphalt mixture to be stored for a long time without clumping.

[0027] (2) The core-shell structure anti-adhesive asphalt cold patching material of the present invention has an aggregate as the core, and an outer layer successively covering an adhesive layer and an anti-adhesive layer. The adhesive layer has pressure-sensitive properties, while the anti-adhesive layer can keep the mixture in a loose state at room temperature.

[0028] (3) The core-shell structure anti-sticking asphalt cold patch material of the present invention does not contain traditional mineral oil diluent. Although traditional mineral oil diluent can reduce the viscosity of asphalt and make it workable at room temperature, the strength of traditional diluted asphalt cold patch material mainly depends on the volatilization of the diluent, and this process will generate a large number of volatile organic compounds (VOCs), which not only pollute the environment, but also pose potential hazards to human health.

[0029] (4) The core-shell structure anti-adhesion asphalt cold patch material of the present invention does not require compaction equipment and heating equipment during construction. It can destroy the anti-adhesion layer formed by fatty acid compounds by relying solely on the traffic load, so that the binder in the bonding layer can flow again and bond with each other. At the same time, it forms a stable structural strength through the interlocking effect between aggregates.

[0030] (5) The core-shell structure anti-sticking asphalt cold patch material of the present invention can quickly form structural strength after being subjected to pressure, and can be opened to traffic without maintenance. No chemical reaction is involved in the strength formation process, the construction process is simple, and the later maintenance cost is low.

[0031] (6) The raw materials used in the core-shell structure anti-sticking asphalt cold patching material of the present invention are non-toxic and harmless, and will not emit volatile organic compounds during production, storage and use. The raw materials are widely available, the cost is low, the preparation process is simple, and it has good economic benefits. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 The images shown are schematic diagrams and physical images of the core-shell structure anti-sticking asphalt cold patching material of the present invention. (a) is a physical image, and (b) is a schematic diagram. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] In the following specific embodiments, unless otherwise specified, the experimental methods used are conventional experimental methods, and the raw materials or reagents used are conventional raw materials or reagents, all of which can be obtained commercially.

[0036] In the following specific implementation, the SBS modified bitumen was purchased from Sinopec.

[0037] In the following specific implementation, the natural rubber resin was purchased from Wenzhou Qihong New Materials Co., Ltd.

[0038] In the following specific implementation, the butyl rubber resin was purchased from Wenzhou Qihong New Materials Co., Ltd.

[0039] In the following specific implementation, the terpene resin was purchased from Wenzhou Qihong New Materials Co., Ltd.

[0040] In the following specific embodiments, the ordinary silicate cement is PO 42.5 ordinary silicate cement.

[0041] Example 1 This embodiment provides a core-shell structure anti-sticking asphalt cold patching material and its preparation method, comprising the following components in parts by weight: 100 parts SBS modified asphalt, 20 parts natural rubber resin, 2400 parts basalt aggregate, 3 parts ordinary silicate cement, and 40 parts methyl stearate, with 1 part by weight being 1 kg.

[0042] The preparation method of the core-shell structure anti-adhesive asphalt cold patch material includes the following steps: S1, using a reaction vessel to mix natural rubber resin and SBS modified asphalt at 200℃, and waiting for the natural rubber resin to completely dissolve to obtain the binder; S2. Basalt aggregate, ordinary Portland cement and the binder from step S1 are mixed at 175°C, so that the binder coats the surface of the basalt aggregate to obtain a mixture. S3. Methyl stearate is coated on the surface of the mixture to form an anti-sticking layer. After cooling to room temperature, it is bagged to obtain the core-shell structure anti-sticking asphalt cold patch material.

[0043] The physical and schematic diagrams of the prepared core-shell structure anti-adhesion asphalt cold patching material are as follows: Figure 1 As shown.

[0044] Example 2 This embodiment provides a core-shell structure anti-sticking asphalt cold patching material and its preparation method, comprising the following components in parts by weight: 100 parts SBS modified asphalt, 10 parts butyl rubber resin, 2200 parts limestone aggregate, 2 parts mineral powder, and 10 parts oleic acid, with 1 part by weight being 1 kg.

[0045] The preparation method of the core-shell structure anti-adhesion asphalt cold patch material includes the following steps: S1, butyl rubber resin and SBS modified asphalt are mixed in a reactor at 180°C until the butyl rubber resin is completely dissolved to obtain the binder. S2. Mix limestone aggregate, ordinary Portland cement and the binder from step S1 at 170°C, so that the binder coats the surface of the limestone aggregate to obtain a mixture. S3. Coat the surface of the mixture with oleic acid to form an anti-sticking layer. After cooling to room temperature, bag it to obtain the core-shell structure anti-sticking asphalt cold patching material.

[0046] Example 3 This embodiment provides a core-shell structured anti-sticking asphalt cold patching material and its preparation method, comprising the following components in parts by weight: 100 parts of SBS modified asphalt, 25 parts of terpene resin, 2500 parts of recycled waste asphalt pavement material, 1 part of ordinary silicate cement, and 20 parts of stearic acid, with 1 part by weight being 1 kg.

[0047] The preparation method of the core-shell structure anti-adhesion asphalt cold patch material includes the following steps: S1, mixing terpene resin and SBS modified asphalt in a reactor at 260°C, and obtaining the binder after the terpene resin is completely dissolved; S2. The waste asphalt pavement recycling material, ordinary silicate cement and the binder in step S1 are mixed at 180°C, so that the binder coats the surface of the waste asphalt pavement recycling material to obtain a mixture. S3. Stearic acid is coated on the surface of the mixture to form an anti-sticking layer. After cooling to room temperature, it is bagged to obtain the core-shell structure anti-sticking asphalt cold patching material.

[0048] Example 4 This embodiment provides a core-shell structure anti-sticking asphalt cold patching material and its preparation method. The difference from Embodiment 1 is that it includes the following components in parts by weight: 100 parts of SBS modified asphalt, 20 parts of natural rubber resin, 2400 parts of basalt aggregate, 1 part of ordinary silicate cement, 2 parts of mineral powder, and 30 parts of methyl oleate. 1 part by weight is 1 kg.

[0049] Example 5 This embodiment provides a core-shell structured non-sticking asphalt cold patching material and its preparation method. The difference from Embodiment 1 is that methyl myristate is used instead of methyl stearate.

[0050] Comparative Example 1 This comparative example provides a core-shell structured non-sticky asphalt cold patching material and its preparation method. The difference between this example and Example 1 is that it does not contain methyl stearate.

[0051] Comparative Example 2 This comparative example provides a core-shell structured non-sticky asphalt cold patching material and its preparation method. The difference from Example 1 is that the amount of methyl stearate used is excessive, at 60 parts.

[0052] Comparative Example 3 This comparative example provides a core-shell structured anti-sticking asphalt cold patching material and its preparation method. The difference from Example 1 is that the amount of methyl stearate used is too small, only 5 parts.

[0053] Comparative Example 4 The difference between this comparative example and Example 1 is that no core-shell structure is set, and all components are mixed at the same time.

[0054] Comparative Example 5 The difference between this comparative example and Example 1 is that it provides an organic solvent-diluted asphalt cold patch material, comprising the following components in parts by weight: 100 parts of SBS modified asphalt, 35 parts of 0# diesel oil thinner, 2700 parts of aggregate, and 2 parts of cement, with 1 part by weight being 1 kg.

[0055] Comparative Example 6 The difference between this comparative example and Example 1 is that it provides an epoxy resin asphalt cold patching material, comprising the following components in parts by weight: 100 parts of base asphalt, 35 parts of bisphenol A type epoxy resin, 15 parts of curing agent, 5 parts of compatibilizer, and 2700 parts of aggregate, with 1 part by weight being 1 kg.

[0056] Comparative Example 7 The difference between this comparative example and Example 1 is that it provides an emulsified asphalt cold patching material, comprising the following components in parts by weight: 100 parts cationic emulsified asphalt, 2000 parts aggregate, 2 parts cement, with 1 part by weight being 1 kg.

[0057] Performance testing Marshall stability test, freeze-thaw splitting test, flowability test, penetration resistance test, and VOCs emission detection were conducted on the asphalt cold patch materials of Examples 1-4 and Comparative Examples 1-7. The Marshall stability test and freeze-thaw splitting test were conducted according to T 0709-2011 and T 0729-2011 of the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The tests were conducted according to T 0751-2011 of the same standard.

[0058] The penetration resistance test is used to evaluate the looseness and workability of cold asphalt patch. The test procedure is as follows: Cold asphalt patch is loaded onto the top of a standard Marshall mold, its surface is leveled, and it is compacted three times with a Marshall compactor. Then, a push-pull force gauge is inserted into the cold asphalt patch at a speed of 1 cm / s to measure its penetration force (resistance). The test temperature is 25℃. The VOCs emission detection test is used to evaluate the VOCs emission concentration of the cold asphalt patch. A portable VOCs gas detector is used to measure the VOCs emission concentration while the cold asphalt patch is stacked on a mixing drum. The test container is kept sealed during the test, and the test temperature is 25℃.

[0059] The performance of the asphalt cold patching material prepared by the above test examples and comparative examples is shown in Table 1.

[0060] Table 1 Road performance test results

[0061] As shown in Table 1, the core-shell structure anti-sticking asphalt cold patch material provided by the present invention meets the relevant technical requirements of the "Technical Specification for Construction of Highway Asphalt Pavement" (JTG F40-2004).

[0062] As shown in Examples 1-5, increasing the amount of methyl stearate continuously increases the thickness of the lubricating and anti-sticking layer, improves the fluidity of the cold patch, and reduces the penetration resistance. Methyl stearate adsorbs onto the surface of the binder through its polar groups, forming an oriented molecular film. Its non-polar long chains extend outwards, constructing a low-surface-energy anti-sticking layer that prevents direct contact between particles and reduces intermolecular adhesion, thus allowing the hot-mix asphalt mixture to be stored for extended periods without clumping. The core-shell structured anti-sticking cold patch prepared by this invention exhibits high strength, good durability, environmental friendliness, and good workability.

[0063] As can be seen from the comparison between Example 1 and Comparative Example 1, the mixture without methyl stearate has no flowability and very high penetration resistance. Under the condition of not containing methyl stearate, the mixture hardens rapidly after mixing, making it difficult to apply at room temperature (25°C) and impossible to use without heating or compaction equipment.

[0064] A comparison of Example 1 and Comparative Example 2 shows that excessive methyl stearate increases the fluidity of the cold patch and reduces its penetration resistance, resulting in a more loose texture. However, this is detrimental to the strength and water resistance of the cold patch. This is because methyl stearate forms an excessively thick anti-sticking layer in the cold patch, which cannot be broken under external force to allow the adhesive to re-bond. Therefore, the later-stage strength and compactness of the cold patch cannot be guaranteed, and its water resistance performance decreases.

[0065] A comparison of Example 1 and Comparative Example 3 shows that insufficient methyl stearate reduces the flowability of the cold patch material, increases its penetration resistance, and reduces its looseness, making it unsuitable for storage. However, it is beneficial to the strength and water resistance of the cold patch material. This is because insufficient methyl stearate cannot form a complete anti-stick layer on the adhesive layer surface, and the adhesive materials remain bonded together.

[0066] A comparison of Example 1 and Comparative Example 4 shows that without a core-shell structure, the asphalt binder and aggregates come into direct contact at room temperature, resulting in adhesion and diffusion. This leads to the hardening and clumping of the cold patch, making it unsuitable for long-term storage. The one-time mixing of all components prevents the fatty acid compounds from oriented properly, resulting in uneven anti-sticking effects and a tendency for localized adhesion or excessive overall looseness, affecting construction uniformity and final road performance. The direct exposure and volatilization of lightweight components in the asphalt increases VOC emissions, exacerbating environmental pollution and material aging. Due to clumping and abnormal viscosity, the mixture cannot achieve the function of repairing pavements at room temperature (25°C).

[0067] As can be seen from the comparison of Example 1 and Comparative Examples 5-7, compared with solvent-based cold asphalt patch materials, the VOCs emission concentration of the core-shell structure anti-sticking cold asphalt patch material of the present invention is significantly reduced. Furthermore, the Marshall stability and freeze-thaw splitting strength ratio of the present invention are much higher than those of solvent-based cold asphalt patch materials. Compared with epoxy resin cold asphalt patch materials, the core-shell structure anti-sticking cold asphalt patch material of the present invention has excellent flowability and long-term storage capacity. Compared with emulsified cold asphalt patch materials, the core-shell structure anti-sticking cold asphalt patch material of the present invention has excellent mechanical strength, long-term storage capacity, and resistance to water damage.

[0068] In summary, this invention provides a core-shell structured anti-adhesion asphalt cold patch and its preparation method. The core-shell structured anti-adhesion asphalt cold patch comprises, from the inside out, a core, a bonding layer, and an anti-adhesion layer. The core is aggregate, the bonding layer is resin-based asphalt binder, and the anti-adhesion layer is a fatty acid compound. The fatty acid compound adsorbs onto the surface of the bonding layer through polar groups, forming an oriented molecular film. Its non-polar long chains extend outwards, constructing a low-surface-energy anti-adhesion layer that prevents direct contact between particles and reduces intermolecular adhesion, thus allowing the hot-mix asphalt mixture to be stored for extended periods without clumping. However, after paving, the anti-adhesion layer formed by the fatty acid compound can be destroyed by traffic loads, causing the binder in the bonding layer to flow and bond again. Simultaneously, stable structural strength is formed through the interlocking action between aggregates.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A core-shell structured anti-sticking asphalt cold patching material, characterized in that, From the inside out, it includes a core, an adhesive layer, and an anti-sticking layer. The adhesive layer includes resin and asphalt, and the anti-sticking layer includes fatty acid compounds. The fatty acid compound is at least one of long-chain unsaturated fatty acids, long-chain saturated fatty acids, or their ester derivatives; The fatty acid compound comprises a nonpolar long chain with an alkyl chain length of C12-C18 and a polar group, wherein the polar group comprises either an ester group or a carboxyl group.

2. The core-shell structure anti-sticking asphalt cold patching material as described in claim 1, characterized in that, The fatty acid compound includes any one of oleic acid, stearic acid, methyl oleate, methyl stearate, and methyl myristate.

3. The core-shell structure anti-sticking asphalt cold patching material as described in claim 1, characterized in that, By weight, it includes 10-25 parts resin, 100 parts bitumen, and 10-40 parts fatty acid compounds.

4. The core-shell structure anti-sticking asphalt cold patching material as described in claim 1, characterized in that, The resin includes any one of natural rubber resin, butyl rubber resin, and terpene resin.

5. The core-shell structure anti-sticking asphalt cold patching material as described in claim 1, characterized in that, The core includes aggregate.

6. The core-shell structure anti-sticking asphalt cold patching material as described in claim 1, characterized in that, It also includes reinforcing agents, which include one or more of cement and mineral powder.

7. The core-shell structure anti-sticking asphalt cold patching material as described in claim 6, characterized in that, By weight, it also includes 2200-2500 parts of aggregate and 1-3 parts of reinforcing agent.

8. The method for preparing core-shell structure anti-sticking asphalt cold patching material according to any one of claims 1 to 7, characterized in that, The process includes the following steps: S1, mixing resin and asphalt to obtain a binder; S2. Mix the binder, aggregate, and reinforcing agent evenly, so that the binder coats the surface of the aggregate to obtain a mixture; S3. Coat the surface of the mixture with fatty acid compounds, and after cooling, obtain the core-shell structured non-sticky asphalt cold patching material.

9. The preparation method of the core-shell structure anti-sticking asphalt cold patching material as described in claim 8, characterized in that, The mixing temperature in step S1 is between 180℃ and 260℃.

10. The preparation method of the core-shell structure anti-sticking asphalt cold patching material as described in claim 8, characterized in that, Therefore, the mixing temperature in step S2 is 170℃~180℃.

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