Moisture-heat aging resistant material for pavement asphalt as well as preparation method and application of damp-heat aging resistant material

Abstract

The invention belongs to the field of road engineering materials, and particularly relates to a damp-heat-aging-resistant material for pavement asphalt and a preparation method and application thereof.The damp-heat-aging-resistant material is prepared from, by weight, 30-40 parts of aromatic hydrocarbon oil, 15-21 parts of polar molecule aggregation inhibitor, 7-12 parts of antioxidant, 5-10 parts of water repellent and 3-8 parts of crosslinking stabilizer; the preparation method can be used for rapidly preparing the damp-heat aging resistant material meeting the long-acting and durable requirements of roads in damp and hot environments in batches. The anti-aging agent is small in dosage, and the anti-aging capability of asphalt in hot and humid areas can be effectively improved only by adding 0.3%-0.8% of the anti-aging agent into the asphalt.

Description

Technical Field

[0001] The present invention belongs to the field of road engineering materials, and particularly relates to a material for resisting hydrothermal aging of paving asphalt, a preparation method thereof, and an application thereof. Background Art

[0002] Paving asphalt is prone to aging under the action of long-term multiple environments, resulting in hardening of asphalt and frequent occurrence of road surface diseases. Especially in the high-temperature and humid areas in the east, the synergistic action of water and oxygen is the main inducement for the reduction of the service performance of asphalt. Water and oxygen molecules react with the active components of asphalt through physical and chemical processes such as penetration, phase change, and interfacial polarity inversion, forming micro-activation centers, intensifying the association effect between polar molecules, and leading to the instability of the colloidal structure and the degradation of performance.

[0003] The anti-aging effects of existing modifiers mainly focus on shielding ultraviolet light and isolating oxygen, etc., and the action mechanism is still unclear, lacking targeted design for "water resistance and oxygen resistance" in humid and hot environments. To delay the aging of asphalt, polymers such as SBS and rubber are used to block oxygen or capture free radicals to enhance the anti-aging property, but these polymers will gradually degrade, resulting in the failure of the network structure. On the other hand, modifiers such as carbon black, layered double metal hydroxides, hindered amine stabilizers, lignin, and nano-TiO2 are also used to improve the anti-aging ability of asphalt. Although the existing asphalt anti-aging technologies have slowed down the aging rate to a certain extent, there are still many limitations, and they have not been able to delay the hardening process of asphalt from the root cause and cannot meet the long-term durability requirements of highways in humid and hot environments.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the existing technology and propose a material for resisting hydrothermal aging of paving asphalt, a preparation method thereof, and an application thereof.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a material for resisting hydrothermal aging of paving asphalt, which comprises the following raw material components by weight:

[0008] 30-40 parts of aromatic oil, 15-21 parts of polar molecule aggregation inhibitor, 7-12 parts of antioxidant, 5-10 parts of water repellent, and 3-8 parts of crosslinking stabilizer.

[0009] Optionally, it comprises the following raw material components by weight:

[0010] 30-35 parts of aromatic oil, 15-18 parts of polar molecule aggregation inhibitor, 7-10 parts of antioxidant, 5-8 parts of water repellent, and 3-5 parts of crosslinking stabilizer.

[0011] Optionally, by weight, it comprises the following raw material components:

[0012] 36 - 40 parts of aromatic oil, 19 - 21 parts of polar molecule aggregation inhibitor, 11 - 12 parts of antioxidant, 9 - 10 parts of water repellent, 6 - 8 parts of crosslinking stabilizer.

[0013] Optionally, by weight, it comprises the following raw material components:

[0014] 33 - 37 parts of aromatic oil, 17 - 18.5 parts of polar molecule aggregation inhibitor, 8.5 - 10.5 parts of antioxidant, 7 - 8.5 parts of water repellent, 4.5 - 7.5 parts of crosslinking stabilizer.

[0015] Optionally, by weight, it comprises the following raw material components:

[0016] 32 - 38 parts of aromatic oil, 16 - 20 parts of polar molecule aggregation inhibitor, 8 - 11 parts of antioxidant, 6 - 9 parts of water repellent, 4 - 7 parts of crosslinking stabilizer.

[0017] Further, the wax content of the aromatic oil is < 2%, the polycyclic aromatic hydrocarbon content is < 5%, and the evaporation loss is < 1%.

[0018] Further, the polar molecule aggregation inhibitor comprises 1 - bromobutane and vinyl imidazole; by molar ratio, 1 - bromobutane:vinyl imidazole = 1:(0.25 - 2.0).

[0019] Specifically, 1 - bromobutane:vinyl imidazole = 1:0.25; 1 - bromobutane:vinyl imidazole = 1:2.0; 1 - bromobutane:vinyl imidazole = 1:1.5; 1 - bromobutane:vinyl imidazole = 1:1.8.

[0020] Further, the antioxidant is a bisphenol - type and / or polyphenol - type hindered phenol antioxidant;

[0021] The antioxidant comprises at least one of antioxidant 3224, antioxidant 3125, and antioxidant 2246 - S.

[0022] Further, the water repellent is an organosilicon water repellent, its active ingredient is silane, in emulsion form, and the active content is 50%.

[0023] Further, the crosslinking stabilizer comprises phenyltri - butanoneoxime silane and sodium polysulfide; by molar ratio, phenyltri - butanoneoxime silane:sodium polysulfide = 1:(0.8 - 1.2).

[0024] Optionally, phenyltri - butanoneoxime silane:sodium polysulfide = 1:1.2; phenyltri - butanoneoxime silane:sodium polysulfide = 1:0.9;

[0025] On the other hand, the present invention provides a preparation method of a material for resisting hydrothermal aging of paving asphalt. Based on the above-mentioned material for resisting hydrothermal aging, the method comprises the following steps:

[0026] Step 1: Weigh aromatic oil, heat it to 35°C - 45°C to enhance its fluidity for easy stirring, and then add a polar molecule aggregation inhibitor, and stir evenly to obtain mixture A;

[0027] Step 2: Add the antioxidant and the water-repellent agent to the mixture A at 35°C - 45°C obtained in Step 1, and stir evenly to obtain mixture B;

[0028] Step 3: Add a crosslinking stabilizer to the mixture B obtained in Step 2, stir and react for 1 - 2 hours, and then cool to room temperature to obtain the material for resisting hydrothermal aging.

[0029] Further, in Step 1, the polar molecule aggregation inhibitor is prepared by an ion exchange method, and the specific process is as follows:

[0030] Add 1-bromobutane and vinylimidazole to a three-necked flask, then heat to 50°C - 60°C, and stir at 50°C - 60°C for 8 - 12 hours to obtain a reaction solution, which is the polar molecule aggregation inhibitor. Specifically, through a nucleophilic substitution reaction, the nitrogen at the 3-position of vinylimidazole nucleophilically attacks 1-bromobutane. The key to the mechanism lies in the selection of the basic site of the imidazole ring and the nucleophilic substitution tendency of primary haloalkanes.

[0031] It should be noted that the polar molecule aggregation inhibitor inhibits the aggregation by destroying the interaction of macromolecular aggregates (such as asphaltenes) formed in the aging reaction, so as to delay hardening.

[0032] Further, in Step 3, the crosslinking stabilizer is prepared by an ion exchange method, and the specific process is as follows:

[0033] Heat phenyltributanone oxime silane to 50°C - 60°C, then add sodium polysulfide, and react at 50°C - 60°C for 2 - 3 hours to obtain a reaction solution, which is the crosslinking stabilizer. Specifically, the reaction mechanism of phenyltributanone oxime silane and sodium polysulfide takes hydrolysis-sulfide condensation as the core, and crosslinking is realized through the nucleophilic substitution of silanol intermediates and sulfide ions.

[0034] The crosslinking stabilizer forms a crosslinked network, restricts the movement of molecular chains, introduces sulfur bonds, improves chemical stability, and reduces the oxidation contact area (the above effects are achieved after preparation);

[0035] It should be noted that the antioxidant inhibits the oxidation reaction of asphalt (free radical chain reaction) and slows down hardening and embrittlement;

[0036] The aromatic oil has excellent solubility and compatibility, can penetrate between polymer chains or asphaltene molecules, reduce the intermolecular force, play a plasticizing role, and can capture some free radicals;

[0037] The water repellent reduces the surface tension and hydrophilicity, hinders the entry of water vapor, and reduces the generation of water vapor micro-activation centers in the asphalt.

[0038] Combining the above raw materials together according to the preparation method of the present invention solves the problems in the hardening and aging of asphalt in corresponding humid and hot regions, as well as problems such as the aggregation of polar molecules, water and oxygen diffusion reactions, and stability.

[0039] On the other hand, the present invention provides an application of the anti-humid and heat aging material for paving asphalt, which is the application of the anti-humid and heat aging material prepared based on the above-mentioned preparation method in asphalt.

[0040] Further, the mass ratio of the anti-humid and heat aging material to asphalt is 0.3% - 0.8%:1.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] 1) The anti-humid and heat aging material provided by the present invention is viscous. Through the directional regulation of polar groups, a low oxidation loss point is constructed, and steric hindrance is generated at the molecular scale. It can inhibit the penetration of water molecules and the development of micropores from the root, stabilize the colloidal structure, and play a synergistic role of "water blocking - antioxidant - interface enhancement" in a humid and hot environment, effectively making up for the defect that traditional asphalt anti-aging agents cannot meet the long-term durability of asphalt in a humid and hot environment. The dosage of the present invention is small. Only by adding 0.3% - 0.8% to asphalt can the anti-aging ability of asphalt in humid and hot regions be effectively improved, and the durability of asphalt pavement can be delayed.

[0043] 2) The preparation method of the anti-humid and heat aging material provided by the present invention is simple in operation, easy to implement, and the prepared anti-humid and heat aging material has excellent performance when applied in asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the present invention.

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0046] Figure 1 It is a flowchart of the preparation method of the anti-humid and heat aging material of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0047] Here, exemplary embodiments will be described in detail. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples consistent with some aspects of the present invention detailed in the appended claims.

[0048] Embodiment 1

[0049] On the one hand, the present invention provides a material for resisting hydrothermal aging of paving asphalt, which, by weight, comprises the following raw material components:

[0050] 30 parts of aromatic oil, 20 parts of polar molecular aggregation inhibitor, 8 parts of antioxidant, 6 parts of organosilicon water repellent, and 5 parts of crosslinking stabilizer.

[0051] Further, the wax content of the aromatic oil is <2%, the polycyclic aromatic hydrocarbon content is <5%, and the evaporation loss is <1%.

[0052] Further, the polar molecular aggregation inhibitor comprises 1-bromobutane and vinyl imidazole; by molar ratio, the 1-bromobutane:vinyl imidazole = 1:0.5.

[0053] Further, the antioxidant is a polyphenolic hindered phenol antioxidant;

[0054] In this embodiment, antioxidant 3224 is selected as the antioxidant.

[0055] Further, the crosslinking stabilizer comprises phenyltributanone oxime silane and sodium polysulfide; by molar ratio, the phenyltributanone oxime silane:sodium polysulfide = 1:0.8.

[0056] On the other hand, please refer to Figure 1 , the present invention provides a preparation method of a material for resisting hydrothermal aging of paving asphalt. Based on the above-mentioned material for resisting hydrothermal aging, it comprises the following steps:

[0057] Step 1: Weigh the aromatic oil, heat it to 40°C, and then add the polar molecular aggregation inhibitor, and stir evenly to obtain mixture A;

[0058] Step 2: Add the antioxidant and the water repellent to the mixture A at 40°C obtained in Step 1, and stir evenly to obtain mixture B;

[0059] Step 3: Add the crosslinking stabilizer to the mixture B obtained in Step 2, stir and react for 1.5 hours, and then cool to room temperature to obtain the material for resisting hydrothermal aging.

[0060] Further, in Step 1, the polar molecular aggregation inhibitor is prepared by an ion exchange method, and the specific process is as follows:

[0061] Add 1-bromobutane and vinylimidazole into a three-necked flask, then heat to 55 °C and stir at 55 °C for 10 hours to obtain a reaction solution, which is the polar molecule aggregation inhibitor.

[0062] Furthermore, in step 3, the crosslinking stabilizer is prepared by the ion exchange method, and the specific process is as follows:

[0063] Heat phenyltributanone oxime silane to 55 °C, then add sodium polysulfide and react at 55 °C for 2.5 hours to obtain a reaction solution, which is the crosslinking stabilizer.

[0064] On the other hand, the present invention provides an application of the anti-hydrothermal aging material for paving asphalt, which is the application of the anti-hydrothermal aging material prepared based on the above-mentioned preparation method in asphalt, especially in asphalt in humid and hot areas.

[0065] Furthermore, the mass ratio of the anti-hydrothermal aging material to asphalt is 0.5%:1.

[0066] Example 2

[0067] On the one hand, the present invention provides an anti-hydrothermal aging material for paving asphalt, which includes the following raw material components by weight:

[0068] 40 parts of aromatic oil, 16 parts of polar molecule aggregation inhibitor, 9 parts of antioxidant, 6 parts of organosilicon water repellent, 3 parts of crosslinking stabilizer.

[0069] Furthermore, the wax content of the aromatic oil < 2%, the polycyclic aromatic hydrocarbon content < 5%, and the evaporation loss < 1%.

[0070] Furthermore, the polar molecule aggregation inhibitor includes 1-bromobutane and vinylimidazole; by molar ratio, 1-bromobutane:vinylimidazole = 1:1.2.

[0071] Furthermore, the antioxidant is a bisphenol type and polyphenol type hindered phenol antioxidant;

[0072] In this example, the antioxidant used is antioxidant 3125 and antioxidant 2246-S, and their mass ratio is 1:1.

[0073] Furthermore, the crosslinking stabilizer includes phenyltributanone oxime silane and sodium polysulfide; by molar ratio, phenyltributanone oxime silane:sodium polysulfide = 1:1.

[0074] On the other hand, the present invention provides a preparation method of the anti-hydrothermal aging material for paving asphalt, based on the above-mentioned anti-hydrothermal aging material, including the following steps:

[0075] Step 1: Weigh the aromatic oil, heat it to 35°C, and then add a polar molecular aggregation inhibitor. Stir evenly to obtain mixture A.

[0076] Step 2: Add the antioxidant and the hydrophobic agent to the 35°C mixture A obtained in Step 1, and stir evenly to obtain mixture B.

[0077] Step 3: Add a crosslinking stabilizer to the mixture B obtained in Step 2, stir and react for 1 hour, and then cool to room temperature to obtain a moisture and heat aging resistant material.

[0078] Further, in Step 1, the polar molecular aggregation inhibitor is prepared by an ion exchange method, and the specific process is as follows:

[0079] Add 1-bromobutane and vinylimidazole to a three-necked flask, then heat to 50°C and stir at 50°C for 12 hours to obtain a reaction solution, which is the polar molecular aggregation inhibitor.

[0080] Further, in Step 3, the crosslinking stabilizer is prepared by an ion exchange method, and the specific process is as follows:

[0081] Heat phenyltributanone oxime silane to 60°C, then add sodium polysulfide, and react at 60°C for 2 hours to obtain a reaction solution, which is the crosslinking stabilizer.

[0082] On the other hand, the present invention provides an application of the moisture and heat aging resistant material for paving asphalt, that is, the application of the moisture and heat aging resistant material prepared based on the above preparation method in asphalt.

[0083] Further, the mass ratio of the moisture and heat aging resistant material to asphalt is 0.8%:1.

[0084] Example 3

[0085] On the one hand, the present invention provides a moisture and heat aging resistant material for paving asphalt, which comprises the following raw material components by weight:

[0086] 36 parts of aromatic oil, 18 parts of polar molecular aggregation inhibitor, 7 parts of antioxidant, 8 parts of organosilicon hydrophobic agent, and 3 parts of crosslinking stabilizer.

[0087] Further, the wax content of the aromatic oil is <2%, the polycyclic aromatic hydrocarbon content is <5%, and the evaporation loss is <1%.

[0088] Further, the polar molecular aggregation inhibitor comprises 1-bromobutane and vinylimidazole; by molar ratio, 1-bromobutane:vinylimidazole = 1:1.

[0089] Further, the antioxidant is a bisphenol type and polyphenol type hindered phenol antioxidant;

[0090] In this embodiment, the antioxidant is selected from antioxidant 3125: antioxidant 2246-S: antioxidant 3224, and their mass ratio is 1:0.8:0.5.

[0091] Further, the crosslinking stabilizer includes phenyltributanone oxime silane and sodium polysulfide; by molar ratio, phenyltributanone oxime silane: sodium polysulfide = 1:1.1.

[0092] On the other hand, the present invention provides a method for preparing a material for resisting hydrothermal aging of paving asphalt. Based on the above-mentioned material for resisting hydrothermal aging, it includes the following steps:

[0093] Step 1: Weigh aromatic oil, heat it to 45 °C, and then add a polar molecule aggregation inhibitor, and stir evenly to obtain mixture A;

[0094] Step 2: Add the antioxidant and the hydrophobic agent to the mixture A at 45 °C obtained in Step 1, and stir evenly to obtain mixture B;

[0095] Step 3: Add the crosslinking stabilizer to the mixture B obtained in Step 2, stir and react for 2 hours, and then cool to room temperature to obtain the material for resisting hydrothermal aging.

[0096] Further, in Step 1, the polar molecule aggregation inhibitor is prepared by an ion exchange method, and the specific process is as follows:

[0097] Add 1-bromobutane and vinylimidazole to a three-necked flask, then heat to 60 °C, and stir at 60 °C for 8 hours to obtain a reaction solution, which is the polar molecule aggregation inhibitor.

[0098] Further, in Step 3, the crosslinking stabilizer is prepared by an ion exchange method, and the specific process is as follows:

[0099] Heat phenyltributanone oxime silane to 50 °C, then add sodium polysulfide, and react at 50 °C for 3 hours to obtain a reaction solution, which is the crosslinking stabilizer.

[0100] On yet another aspect, the present invention provides an application of a material for resisting hydrothermal aging of paving asphalt. The application of the material for resisting hydrothermal aging prepared based on the above-mentioned preparation method in asphalt.

[0101] Further, the mass ratio of the material for resisting hydrothermal aging to asphalt is 0.3%:1.

[0102] Comparative Example 1

[0103] The difference between this comparative example and Example 1 is that the polar molecule aggregation inhibitor is removed. The material for resisting hydrothermal aging in this comparative example, by weight, includes the following raw material components: 30 parts of aromatic oil, 8 parts of antioxidant, 6 parts of organosilicon hydrophobic agent, and 5 parts of crosslinking stabilizer.

[0104] Comparative Example 2

[0105] The difference between this comparative example and Example 2 is that the silicone water repellent is removed. The anti-humid heat aging material of this comparative example, by weight, comprises the following raw material components: 40 parts of aromatic oil, 16 parts of polar molecular aggregation inhibitor, 9 parts of antioxidant, and 3 parts of crosslinking stabilizer.

[0106] Comparative Example 3

[0107] The difference between this comparative example and Example 2 is that the polar molecular aggregation inhibitor and the silicone water repellent are removed. The anti-humid heat aging material of this comparative example, by weight, comprises the following raw material components: 40 parts of aromatic oil, 9 parts of antioxidant, and 3 parts of crosslinking stabilizer. The anti-humid heat aging material of this comparative example is a conventional anti-aging material.

[0108] The anti-humid heat aging materials of Examples 1 to 3 and Comparative Examples 1 to 3 of the present invention were respectively added to the same 70# A-grade road asphalt at an addition amount of 0.5% for preparation, and then a long-term humid heat aging test (humidity: 70%, temperature: 80%, time: 16 days) was carried out. According to the technical standards of "Test Procedures for Bitumen and Bituminous Mixtures in Highway Engineering" JTG E20-2011, the performance of each aged asphalt sample was tested, and the performance was compared with that of the unaged 70# A-grade road asphalt, as shown in Table 1.

[0109] Table 1 is a comparison table of asphalt performance before and after humid heat aging

[0110]

[0111]

[0112] As can be seen from Table 1, after the 70# A-grade road asphalt was respectively added with the anti-humid heat aging materials of Examples 1 to 3, after humid heat aging, the anti-aging performance of the asphalt containing the anti-humid heat aging material was significantly improved, far superior to the index value of the 70# A-grade road asphalt. Compared with the original 70# asphalt, the penetration and softening point of the asphalt containing the anti-humid heat aging material increased and decreased respectively after aging, the fatigue factor decreased, the anti-fatigue performance increased, and the service time of the asphalt was extended. The asphalt anti-aging agents of Examples 1 to 3 can significantly improve their anti-aging performance without affecting other properties of the road asphalt product. Although there is a slight improvement in the comparative examples, the effect is not obvious compared with Examples 1 to 3 of the present invention.

[0113] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0114] It should be understood that the present invention is not limited to the above-described content and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A material for paving asphalt that resists moisture and heat aging, characterized in that: By weight, it includes the following raw material components: 30-40 parts of aromatic oil, 15-21 parts of polar molecule aggregation inhibitor, 7-12 parts of antioxidant, 5-10 parts of hydrophobic agent, and 3-8 parts of cross-linking stabilizer.

2. The anti-wet heat aging material according to claim 1, characterized in that: The polar molecule aggregation inhibitor comprises 1-bromobutane and vinyl imidazole; in terms of molar ratio, the 1-bromobutane:vinyl imidazole=1:(0.25-2.0).

3. The anti-wet heat aging material according to claim 1, characterized in that: The antioxidant is a bisphenol-type and / or polyphenol-type hindered phenol antioxidant; The antioxidant includes at least one of antioxidant 3224, antioxidant 3125 and antioxidant 2246-S.

4. The anti-wet heat aging material according to claim 1, characterized in that: The water repellent is an organic silicon water repellent.

5. The anti-wet heat aging material according to claim 1, characterized in that: The cross-linking stabilizer comprises phenyltributylacetoximate silane and sodium polysulfide; in terms of molar ratio, the phenyltributylacetoximate silane: sodium polysulfide = 1: (0.8-1.2).

6. A method for preparing a material for paving asphalt that resists moisture and heat aging, characterized in that: The anti-wet heat aging material according to any one of claims 1 to 5 comprises the following steps: Step 1, weighing aromatic oil, heating it to 35° C. to 45° C., then adding a polar molecule aggregation inhibitor, and stirring uniformly to obtain a mixture A; Step 2, adding the antioxidant and the hydrophobic agent to the mixture A at 35° C. to 45° C. obtained in step 1, and stirring evenly to obtain a mixture B; Step 3: Add a crosslinking stabilizer to the mixture B obtained in step 2, stir and react for 1 to 2 hours, then cool to room temperature to obtain a moisture-heat aging resistant material.

7. The method for preparing the anti-wet heat aging material according to claim 6, characterized in that: In step 1, the polar molecule aggregation inhibitor is prepared by ion exchange method, and the specific process is as follows: Add 1-bromobutane and vinylimidazole into a three-necked flask, then heat to 50°C to 60°C, and stir at 50°C to 60°C for 8 to 12 hours to obtain a reaction solution, which is a polar molecule aggregation inhibitor.

8. The method for preparing the anti-wet heat aging material according to claim 6, characterized in that: In step 3, the cross-linking stabilizer is prepared by an ion exchange method, and the specific process is as follows: The phenyl trisbutyl ketoxime silane is heated to 50°C to 60°C, and then sodium polysulfide is added and reacted at 50°C to 60°C for 2 to 3 hours to obtain a reaction liquid, which is a cross-linking stabilizer.

9. An application of a material resistant to moisture and heat aging, characterized in that: Application of the moisture-heat aging resistant material obtained by the preparation method according to any one of claims 6 to 8 in asphalt.

10. The use according to claim 9, characterized in that: The mass ratio of the anti-wet heat aging material to asphalt is 0.3% to 0.8%:1.

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