Anti-rut asphalt concrete and method of making same

Abstract

The application relates to the technical field of asphalt concrete, and discloses anti-rutting asphalt concrete and a preparation method thereof, wherein the asphalt concrete comprises the following raw materials in parts by weight: 100-120 parts of asphalt, 350-370 parts of stone, 150-170 parts of river sand, 55-65 parts of filler, 10-20 parts of rubber and 12-16 parts of modified carbon fiber; the modified carbon fiber is prepared by modifying the surface of carbon fiber through a vinyl silane coupling agent to obtain vinyl silane coupling agent grafted carbon fiber, and then the vinyl silane coupling agent grafted carbon fiber is reacted with styrene, acrylamide and limonene under the action of an initiator and a crosslinking agent; the asphalt concrete has the advantages that the internal cohesion of the asphalt material is improved, and therefore the anti-rutting stability of the asphalt concrete is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt concrete, in particular to an anti-rutting asphalt concrete and a preparation method thereof. BACKGROUND

[0002] Asphalt pavement occupies a considerable proportion in highways due to its excellent performance. However, in recent years, due to the limitations of the performance of raw materials of asphalt pavement, the increase of traffic volume and overloaded vehicles, and the deterioration of climate conditions, asphalt pavement is facing severe challenges. Many newly built asphalt pavements have appeared early diseases after being put into use, among which, rutting disease has become one of the most serious early diseases that endanger asphalt pavement. The occurrence of rutting makes the road roughness worse and causes other diseases such as net cracking, potholes, and pits. This not only affects the comfort and safety of driving, but also reduces economic and social benefits, so the prevention and treatment of rutting disease is the primary problem in current highway construction. The peeling of asphalt from the surface of aggregate and the gradual loss of cohesion in asphalt material are important factors that induce the formation of rutting damage in pavement. SUMMARY

[0003] In order to improve the cohesion in asphalt material and thus improve the anti-rutting stability of asphalt concrete, the present application provides an anti-rutting asphalt concrete and a preparation method thereof.

[0004] In the first aspect, the present application provides an anti-rutting asphalt concrete, which adopts the following technical scheme:

[0005] An anti-rutting asphalt concrete, characterized in that it comprises the following raw materials by weight: 100-120 parts of asphalt, 350-370 parts of stone, 150-170 parts of river sand, 55-65 parts of filler, 10-20 parts of rubber, and 12-16 parts of modified carbon fiber.

[0006] The modified carbon fiber is prepared by modifying the surface of carbon fiber with a vinyl silane coupling agent to obtain vinyl silane coupling agent grafted carbon fiber, and then reacting with styrene, acrylamide and limonene under the action of an initiator and a crosslinking agent.

[0007] By adopting the technical scheme, the anti-rutting agent with excellent tackifying effect is obtained through the polymerization reaction of styrene, acrylamide and limonene. Then the surface of the carbon fiber is modified to have double bonds, and the anti-rutting agent is loaded on the surface of the carbon fiber through in-situ cross-linking polymerization to obtain the modified carbon fiber. The anti-rutting agent loaded on the surface of the carbon fiber can make the carbon fiber have stronger bonding force with the asphalt, improve the viscosity of the asphalt, cross-link into a three-dimensional network structure in the asphalt system, make the asphalt have stronger integrity, increase the bonding force of the asphalt, and the asphalt is not easy to crack, so the anti-rutting stability of the asphalt concrete is greatly improved. Moreover, the carbon fiber itself has good mechanical strength, and the interaction with other raw materials can effectively reduce the rut depth and further improve the anti-rutting stability of the asphalt concrete.

[0008] Preferably, the amount of the modified carbon fiber is 14 parts by weight.

[0009] By adopting the technical scheme, the anti-rutting stability of the asphalt concrete is gradually improved as the amount of the modified carbon fiber gradually increases, but the increasing rate becomes slow when the amount is more than 14 parts by weight. Considering the production cost and actual effect, the optimal amount of the modified carbon fiber is 14 parts by weight.

[0010] Preferably, the length of the carbon fiber is 2-4 cm.

[0011] By adopting the technical scheme, the length of the carbon fiber is an important factor affecting the anti-rutting stability of the asphalt concrete. When the length of the carbon fiber is short, the three-dimensional network structure formed by the carbon fiber is insufficient, and the integrity of the asphalt concrete is reduced. When the length of the carbon fiber is long, the modified carbon fiber is not dispersed enough in the system, and the anti-rutting agent loaded on the carbon fiber is not as sufficient as when the length of the carbon fiber is short. Therefore, the optimal length of the carbon fiber is 3 cm.

[0012] Preferably, the preparation method of the modified carbon fiber is as follows:

[0013] Under the protection of inert gas, 9-11 parts by weight of the vinyl silane coupling agent grafted carbon fiber is put into 15-17 parts by weight of DMF, ultrasonic dispersion is performed, then 18-20 parts by weight of styrene, 7-9 parts by weight of acrylamide and 5-7 parts by weight of limonene are added, the temperature is increased to 55-65℃, an initiator and a cross-linking agent are added, stirring is performed for 20-24 h, filtration and washing are performed, and the modified carbon fiber is obtained. The weight parts of the initiator added is 0.45-0.55% of the total weight parts of the monomers, and the weight parts of the cross-linking agent added is 0.7-0.9% of the total weight of the monomers.

[0014] By adopting the technical scheme, the vinyl silane coupling agent grafted carbon fiber can realize in-situ polymerization through the double bond on the surface, thereby successfully loading the anti-rutting agent, and the anti-rutting agent is not easy to fall off from the surface of the carbon fiber in the stirring through the in-situ polymerization.

[0015] As a preference, the initiator is azobisisobutyronitrile or azobisisoheptyl nitrile.

[0016] As a preference, the vinyl silane coupling agent is vinyl triethoxysilane or vinyl trimethoxysilane.

[0017] As a preference, in the preparation method of the modified carbon fiber, the raw material further includes 1-3 parts by weight of the vinyl silane coupling agent.

[0018] By adopting the technical scheme, the anti-rutting agent molecule adds a certain amount of silicon atoms, which can effectively reduce the surface energy between the asphalt and the aggregate, improve the bonding force between the asphalt and the aggregate, make the asphalt not easy to peel off the surface of the aggregate, make the asphalt concrete not easy to crack, thereby improving the anti-rutting performance. However, the proportion of the vinyl silane coupling agent should not be too large, and too much addition will reduce the tackifying effect of the anti-rutting agent, thereby being not conducive to the exertion of its own function.

[0019] As a preference, the filler is a mixture of organic bentonite and sepiolite, and the weight ratio of the organic bentonite to the sepiolite is 2:1; the filler is treated by the silane coupling agent, and the specific treatment method is as follows:

[0020] 2-4 parts by weight of the silane coupling agent A171 is added into 50-60 parts by weight of ethanol, and then 5-8 parts by weight of the filler is added, and stirred and reacted for more than 24 h, and then filtered, washed and dried, to obtain the filler treated by the silane coupling agent.

[0021] By adopting the technical scheme, the organic bentonite can form a gel in various organic solvents, oils and liquid resins, and has good thickening property, thixotropy, suspension stability, high-temperature stability, lubricity, film-forming property, water resistance and chemical stability, and has important application value in the coating industry. By adding the organic bentonite, it is found that the organic bentonite can be added as a filler into the asphalt concrete system, can increase the viscosity of the asphalt, can increase the flowability of the asphalt road after meeting water, and is not easy to separate the asphalt from the aggregate; similarly, the sepiolite can become soft after meeting water, and can synergize with the organic bentonite, greatly improving the flowability and viscosity of the asphalt after meeting water, making the integrity of the asphalt concrete stronger, and greatly preventing the cracking of the asphalt concrete; the two are added together, which can greatly improve the anti-rutting stability and water stability of the asphalt concrete, and work together with the modified carbon fiber to prolong the service life of the asphalt concrete.

[0022] In a second aspect, the application provides a preparation method of anti-rutting asphalt concrete, which adopts the following technical scheme:

[0023] A preparation method of anti-rutting asphalt concrete, which comprises the following steps:

[0024] S1, mix and stir the stones, river sand and fillers, and dry them at 90-100℃ to obtain a mixture A;

[0025] S2, heat the asphalt to 130-150℃, then add the modified carbon fibers and rubber, stir for 10-20min, then add the mixture A and stir uniformly to obtain the asphalt concrete.

[0026] By adopting the above technical scheme,

[0027] In summary, the application has at least one of the following beneficial technical effects:

[0028] 1. The anti-rutting agent obtained by the polymerization reaction of styrene, acrylamide and limonene has excellent tackifying effect. Then the surface of the carbon fibers is modified to have double bonds, and the anti-rutting agent is loaded on the surface of the carbon fibers through in-situ crosslinking polymerization to obtain modified carbon fibers. The anti-rutting agent loaded on the surface of the carbon fibers can make the carbon fibers have stronger bonding force with the asphalt, improve the viscosity of the asphalt, crosslink into a three-dimensional network structure in the asphalt system, make the asphalt have stronger integrity, increase the adhesion of the asphalt, and thus the asphalt is not easy to crack, so that the anti-rutting stability of the asphalt concrete is greatly improved. Moreover, the carbon fibers themselves have good mechanical strength, and the interaction with other raw materials can effectively reduce the rut depth and further improve the anti-rutting stability of the asphalt concrete.

[0029] 2. The addition of a certain amount of silicon atoms in the anti-rutting agent molecules can effectively reduce the surface energy between the asphalt and the aggregate, improve the bonding force between the asphalt and the aggregate, make the asphalt not easy to peel off the surface of the aggregate, make the asphalt concrete not easy to crack, and thus improve the anti-rutting performance. However, the proportion of the vinyl silane coupling agent should not be too large, otherwise the tackifying effect of the anti-rutting agent will be reduced, and thus the function of the anti-rutting agent itself cannot be fully played.

[0030] 3. The dynamic stability of the asphalt concrete prepared by the application is between 10695-11586 times / mm after adding the modified carbon fibers; the rut depth is 0.667mm or below; at the same time, the freeze-thaw splitting residual strength ratio is 93.5% or above, and the maximum can reach 94.9%. It shows that the asphalt concrete prepared by the application has excellent anti-rutting stability, and its water resistance also performs well, which can effectively improve the durability of the asphalt concrete. DETAILED DESCRIPTION

[0031] The application will be further described in detail in connection with the specific contents.

[0032] Raw materials

[0033] The raw materials used in the preparation examples and examples of the present application are all ordinary commercially available products.

[0034] Preparation example

[0035] Preparation example 1

[0036] A modified carbon fiber is prepared as follows:

[0037] S1, 11g of carbon fiber is added to 160g of 65% mass fraction concentrated nitric acid, ultrasonic dispersion for 35min, then heated to 90℃, reacted for 3h, then filtered, the precipitate was washed to neutral, dried, to obtain acid treated carbon fiber; wherein the length of the carbon fiber is 2cm;

[0038] S2, the acid treated carbon fiber obtained in S1 and 18g of vinyl silane coupling agent are mixed, then 130g of ethanol is added, then acetic acid is added to adjust the pH value of the system to 4, then ultrasonic treatment is carried out for 30min, then reaction is carried out at 55℃ for 5h, after the reaction is completed, filtration is carried out, the precipitate is washed, dried, to obtain vinyl silane coupling agent grafted carbon fiber; wherein the vinyl silane coupling agent is vinyl triethoxysilane;

[0039] S3, under the protection of inert gas, 10g of vinyl silane coupling agent grafted carbon fiber is put into 16g of DMF, ultrasonic dispersion is carried out, then 19g of styrene, 8g of acrylamide and 6g of limonene are added, heated to 60℃, initiator and crosslinking agent are added, stirring reaction is carried out for 22h, filtration is carried out, washing is carried out, drying is carried out, to obtain modified carbon fiber; the mass of the initiator added is 0.5% of the total mass of the monomers; the mass of the crosslinking agent added is 0.8% of the total mass of the monomers; wherein the initiator is azobisisobutyronitrile; the crosslinking agent is dimethyl glycol methacrylate.

[0040] Preparation example 2

[0041] A modified carbon fiber, which is different from preparation example 1, is that the length of the carbon fiber is 3cm, and the remaining steps are the same as those of preparation example 1.

[0042] Preparation example 3

[0043] A modified carbon fiber, which is different from preparation example 1, is that the length of the carbon fiber is 4cm, and the remaining steps are the same as those of preparation example 1.

[0044] Preparation example 4

[0045] A modified carbon fiber, which is different from Preparation Example 2 in that the monomer added in S3 further includes 1 g of a vinyl silane coupling agent, and the remaining steps are the same as those in Preparation Example 2.

[0046] Preparation Example 5

[0047] A modified carbon fiber, which is different from Preparation Example 2 in that the monomer added in S3 further includes 3 g of a vinyl silane coupling agent, and the remaining steps are the same as those in Preparation Example 2.

[0048] Example

[0049] Example 1

[0050] A rut-resistant asphalt concrete, the raw materials and the amounts of the raw materials are shown in Table 1, and the preparation method is as follows:

[0051] S1, the stones, river sand and fillers are mixed and stirred, and dried at 90°C to obtain a mixture A;

[0052] S2, the asphalt is heated to 140°C, then the modified carbon fiber and rubber are added and stirred for 15 min, then the mixture A is added and stirred uniformly to obtain the asphalt concrete.

[0053] wherein the asphalt is petroleum asphalt; the average particle size of the stone is 1.5 cm; the average particle size of the river sand is 0.1 cm; the rubber is styrene-butadiene rubber with a particle size of 40 mesh; the modified carbon fiber is from Preparation Example 1; the filler is a mixture of organic bentonite and sepiolite, and the weight ratio of the organic bentonite to the sepiolite is 2:1; the filler is treated by a silane coupling agent, and the specific treatment method is as follows:

[0054] 3 kg of silane coupling agent A171 is added to 55 kg of ethanol, then 6.5 kg of the filler is added, and stirred and reacted for 24 h or more, then filtered, washed and dried to obtain the filler treated by the silane coupling agent.

[0055] Table 1: Raw materials and amounts of raw materials (kg) in Example 1

[0056] asphalt 110 stone 360 river sand 160 filler 60 rubber 15 modified carbon fiber 12

[0057] Example 2

[0058] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber is from Preparation Example 2, and the remaining steps are the same as those in Example 1.

[0059] Example 3

[0060] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber is from Preparation Example 3, and the remaining steps are the same as those in Example 1.

[0061] Example 4

[0062] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber is from Preparation Example 4, and the remaining steps are the same as Example 1.

[0063] Example 5

[0064] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber is from Preparation Example 5, and the remaining steps are the same as Example 1.

[0065] Example 6

[0066] A rut-resistant asphalt concrete, which is different from Example 4 in that the amount of the modified carbon fiber added is 14 kg, and the remaining steps are the same as Example 4.

[0067] Example 7

[0068] A rut-resistant asphalt concrete, which is different from Example 4 in that the amount of the modified carbon fiber added is 16 kg, and the remaining steps are the same as Example 4.

[0069] Comparative Example

[0070] Comparative Example 1

[0071] A rut-resistant asphalt concrete, which is different from Example 1 in that no modified carbon fiber is added to the raw materials, and the remaining steps are the same as Example 1.

[0072] Comparative Example 2

[0073] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber added to the raw materials is replaced with equal mass of vinyl silane coupling agent grafted carbon fiber, and the remaining steps are the same as Example 1.

[0074] Comparative Example 3

[0075] A rut-resistant asphalt concrete, which is different from Example 1 in that the modified carbon fiber added to the raw materials is replaced with equal mass of modified polymer, and the preparation method of the modified polymer is as follows:

[0076] Under the protection of inert gas, 19 g of styrene, 8 g of acrylamide and 6 g of limonene are added to 16 g of DMF, heated to 60°C, and then an initiator and a crosslinking agent are added, stirred for 22 h, filtered, washed, and dried to obtain the modified polymer; the mass of the initiator added is 0.5% of the total mass of the monomers; the mass of the crosslinking agent added is 0.8% of the total mass of the monomers; wherein the initiator is azobisisobutyronitrile; the crosslinking agent is dimethyl acrylate; and the prepared modified polymer is crushed to a particle size of 0.1 cm.

[0077] Comparative Example 4

[0078] A rut-resistant asphalt concrete, which is different from Example 1 in that the vinyl silane coupling agent added in the preparation of the modified carbon fiber is 5 g, and the remaining steps are the same as those of Example 1.

[0079] Comparative Example 5

[0080] A rut-resistant asphalt concrete, which is different from Example 1 in that the organic bentonite is replaced with an equal amount of sepiolite in the filler added in the raw material, and the remaining steps are the same as those of Example 1.

[0081] Comparative Example 6

[0082] A rut-resistant asphalt concrete, which is different from Example 1 in that the sepiolite is replaced with an equal amount of organic bentonite in the filler added in the raw material, and the remaining steps are the same as those of Example 1.

[0083] Performance test

[0084] Detection method / test method

[0085] The rut-resistant asphalt concrete was prepared according to the preparation methods in Examples 1-7 and Comparative Examples 1-6, and then detected according to the following detection methods, and the detection results are shown in Table 2.

[0086] The detection tests in Table 2 were carried out according to the test methods in “Highway Engineering Asphalt and Asphalt Mixture Test Regulations” (JTJ052-2000), and the technical indicators were compared according to “Highway Asphalt Pavement Construction Technical Specifications” (JTGF40-2004).

[0087] Table 2 Detection results of Examples 1-7 and Comparative Examples 1-6

[0088]

[0089] From Examples 1-7 and Comparative Examples 1-6 and the detection data in Table 2, it can be seen that the dynamic stability of the asphalt concrete prepared in the present application after adding the modified carbon fiber to the copper drum is between 10695-11586 times / mm; the rut depth is 0.667 mm or less; at the same time, the freeze-thaw splitting residual strength ratio is 93.5% or more, and the maximum can reach 94.9%. It shows that the asphalt concrete prepared in the present application has excellent rut-resistant stability, and its water resistance also performs well, which can effectively improve the durability of the asphalt concrete.

[0090] The anti-rutting agent can play a viscosity-increasing effect in the asphalt mixture, and can significantly improve the anti-rutting stability of the asphalt concrete. In the application, the anti-rutting agent with excellent viscosity-increasing effect is obtained through the polymerization reaction of styrene, acrylamide and limonene. Then, the surface of the carbon fiber is modified to have double bonds, and the anti-rutting agent is loaded on the surface of the carbon fiber through in-situ cross-linking polymerization to obtain the modified carbon fiber. The anti-rutting agent loaded on the surface of the carbon fiber can make the carbon fiber have stronger bonding force with the asphalt, increase the viscosity of the asphalt, cross-link into a three-dimensional network structure in the asphalt system, make the asphalt have stronger integrity, increase the bonding force of the asphalt, and the asphalt is not easy to crack, so that the anti-rutting stability of the asphalt concrete is greatly improved. Moreover, the carbon fiber itself has good mechanical strength, can effectively reduce the rut depth, and further improve the anti-rutting stability of the asphalt concrete.

[0091] It can be known from the detection data of Examples 1 and Comparative Examples 1-3 that the improvement range of the anti-rutting stability brought by adding the anti-rutting agent and the vinyl silane coupling agent grafted carbon fiber alone is not as good as adding the modified carbon fiber.

[0092] It can be known from the detection data of Examples 1-3 that the length of the carbon fiber is an important factor affecting the anti-rutting stability of the asphalt concrete, and the length of 3 cm is the optimal choice. When the length of the carbon fiber is shorter, the three-dimensional network structure formed by the carbon fiber is insufficient, and the integrity of the asphalt concrete is reduced. When the length of the carbon fiber is longer, the dispersion of the modified carbon fiber in the system is insufficient, and the anti-rutting agent loaded on the carbon fiber is not as sufficient as when the length of the carbon fiber is shorter.

[0093] It can be seen from the detection data of Example 2 and Examples 4-5 that the addition of a certain amount of silicon atoms in the anti-rutting agent molecules in the application can effectively reduce the surface energy between the asphalt and the aggregate, improve the bonding force between the asphalt and the aggregate, make the asphalt not easy to peel off the surface of the aggregate, make the asphalt concrete not easy to crack, and thus improve the anti-rutting performance. In combination with Comparative Example 4, the vinyl silane coupling agent should not be added in too large a proportion, and too much addition will reduce the viscosity-increasing effect of the anti-rutting agent, and thus is not conducive to the exertion of the function of the anti-rutting agent itself.

[0094] It can be known from the detection data of Example 4 and Examples 6-7 that when the amount of the modified carbon fiber gradually increases, the anti-rutting stability of the asphalt concrete gradually increases, but the increase range becomes slow when the amount of the modified carbon fiber is more than 14 kg. Considering the production cost and actual effect, the optimal addition amount of the modified carbon fiber is 14 kg.

[0095] The filler added in the application is a mixture of sepiolite and organic bentonite, and the organic bentonite is an inorganic mineral / organic ammonium compound. The organic bentonite is made of bentonite as raw material, by using the lamellar structure of montmorillonite in bentonite and its property of swelling and dispersing into colloidal particles in water or organic solvents, and by inserting an organic coating agent through ion exchange technology. The organic bentonite can form a gel in various types of organic solvents, oils and liquid resins, and has good thickening, thixotropy, suspension stability, high temperature stability, lubricity, film forming property, water resistance and chemical stability, and has important application value in the paint industry. By adding the organic bentonite, it is found that the addition of the organic bentonite as a filler to the asphalt concrete system can increase the viscosity of the asphalt, and after encountering water, the asphalt road fluidity can be increased, and the asphalt and aggregate are not easy to separate; similarly, sepiolite can become soft after encountering water, and can synergize with the organic bentonite, greatly improving the fluidity and viscosity of the asphalt after encountering water, making the asphalt concrete more integral, greatly preventing the cracking of the asphalt concrete; the addition of both can greatly improve the anti-rutting stability and water stability of the asphalt concrete, and the combined action of the modified carbon fiber prolongs the service life of the asphalt concrete.

[0096] As can be seen from the test data of Examples 1 and Comparative Examples 5-6, the anti-rutting stability and freeze-thaw splitting residual strength ratio of the asphalt concrete are better than when one of them is added alone. Therefore, the two have a synergistic effect.

[0097] The specific embodiments are only an explanation of the application, and are not a limitation of the application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, as long as the modifications are within the scope of the claims of the application.

Claims

1. An anti-rut asphalt concrete, characterized by: It comprises the following raw materials by weight: asphalt 100-120 parts, stone 350-370 parts, river sand 150-170 parts, filler 55-65 parts, rubber 10-20 parts and modified carbon fiber 12-16 parts; The modified carbon fiber is prepared by modifying the surface of carbon fiber with a vinyl silane coupling agent to obtain vinyl silane coupling agent grafted carbon fiber, and then reacting with styrene, acrylamide and limonene in the presence of an initiator and a crosslinking agent.

2. The anti-rut asphalt concrete of claim 1, wherein: The addition amount of the modified carbon fiber is 14 parts by weight.

3. The anti-rut asphalt concrete of claim 1, wherein: The length of the carbon fiber is 2-4 cm.

4. The anti-rut asphalt concrete of claim 1, wherein: The preparation method of the modified carbon fiber is as follows: Under the protection of inert gas, 9-11 parts by weight of vinyl silane coupling agent grafted carbon fiber is put into 15-17 parts by weight of DMF and ultrasonically dispersed, then 18-20 parts by weight of styrene, 7-9 parts by weight of acrylamide and 5-7 parts by weight of limonene are added, the temperature is raised to 55-65℃, an initiator and a crosslinking agent are added, and stirring is carried out for 20-24 h, then filtration, washing, and the modified carbon fiber is obtained; the weight parts of the initiator added is 0.45-0.55% of the total weight parts of the monomers; the weight parts of the crosslinking agent added is 0.7-0.9% of the total weight of the monomers.

5. The anti-rut asphalt concrete of claim 1, wherein: The initiator is azobisisobutyronitrile or azobisisoheptyl nitrile.

6. The anti-rut asphalt concrete of claim 1, wherein: The vinyl silane coupling agent is vinyl triethoxysilane or vinyl trimethoxysilane.

7. The anti-rut asphalt concrete of claim 4, wherein: In the preparation method of the modified carbon fiber, the raw materials further include 1-3 parts by weight of a vinyl silane coupling agent.

8. The anti-rut asphalt concrete of claim 1, wherein: The filler is a mixture of organic bentonite and sepiolite, and the weight ratio of the organic bentonite to the sepiolite is 2:1; the filler is treated with a silane coupling agent, and the specific treatment method is as follows: 2-4 parts by weight of silane coupling agent A171 is added to 50-60 parts by weight of ethanol, then 5-8 parts by weight of filler is added, stirring is carried out for 24 h or more, then filtration, washing and drying, and the silane coupling agent treated filler is obtained.

9. A method of producing the anti-rut asphalt concrete according to any one of claims 1 to 8, characterized by: It comprises the following steps: S1, stone, river sand and filler are mixed and stirred, and are dried at 90-100℃ to obtain mixed material A; S2, asphalt is heated to 130-150℃, then the modified carbon fiber and rubber are added, stirring is carried out for 10-20 min, then the mixed material A is added, and stirring is carried out until uniform, and asphalt concrete is obtained.

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