Water resistant asphalt concrete and method of making same

Abstract

The application relates to the technical field of asphalt concrete, and discloses water-resistant asphalt concrete and a preparation method thereof, wherein the asphalt concrete comprises the following raw materials in parts by weight: 120-150 parts of asphalt, 10-14 parts of carbon fiber-hydrogel composite material, 300-350 parts of stone, 100-150 parts of river sand and 50-70 parts of filler; the carbon fiber-hydrogel composite material 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 a vinyl silane coupling agent, hydroxyethyl methacrylate and N-vinyl pyrrolidone under the action of an initiator and a crosslinking agent; the water resistance of the asphalt concrete is improved, and the service life of the asphalt concrete is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt concrete, and particularly relates to a water-resistant asphalt concrete and a preparation method thereof. BACKGROUND

[0002] Asphalt concrete is a commonly used material for laying roads, and is used more in road construction in China. Asphalt concrete pavement belongs to soft pavement and has the advantages of comfortable driving and low noise. Asphalt concrete is generally a mixture prepared by mixing asphalt material, coarse aggregate, fine aggregate and filler at a specific ratio. However, in areas with more rain, the asphalt concrete is often in a harsh condition of rain erosion. After long-term soaking, the adhesion of the asphalt decreases, and after repeated action of external forces such as vehicle load, the asphalt and aggregate are separated, resulting in loose and pothole of the asphalt concrete, and reducing the service life of the asphalt concrete. SUMMARY

[0003] In order to improve the water resistance of the asphalt concrete and prolong the service life of the asphalt concrete, the present application provides a water-resistant asphalt concrete and a preparation method thereof.

[0004] In a first aspect, the present application provides a water-resistant asphalt concrete, which adopts the following technical scheme:

[0005] The water-resistant asphalt concrete comprises the following raw materials by weight: 120-150 parts of asphalt, 10-14 parts of carbon fiber-hydrogel composite material, 300-350 parts of stone, 100-150 parts of river sand and 50-70 parts of filler.

[0006] The average particle size of the stone is 0.7-1.5 cm, and the average particle size of the river sand is 0.1-0.3 cm.

[0007] The carbon fiber-hydrogel composite material 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 the vinyl silane coupling agent grafted carbon fiber with a vinyl silane coupling agent, hydroxyethyl methacrylate and N-vinyl pyrrolidone under the action of an initiator and a crosslinking agent.

[0008] By adopting the technical scheme, the carbon fiber-hydrogel composite material is prepared by in-situ polymerization on the surface of the carbon fiber and loading of the hydrogel, the hydrogel layer is formed on the surface of the carbon fiber, the asphalt has a certain water absorption performance when the carbon fiber-hydrogel composite material is added into the asphalt concrete, the water absorption responsiveness of the hydrogel is relatively good, the hydrogel can be expanded in a relatively short time after absorbing water, and the hydrogel can still maintain the viscoelasticity of the asphalt molecules after absorbing water and expanding, thereby forming a relatively strong extrusion force in the system, and the water is effectively prevented from further penetrating and diffusing into the system; the more serious the water flushing of the external environment is, the greater the pressure formed is, and the more difficult the subsequent water is to penetrate; thereby the water resistance of the product is effectively improved. On the other hand, compared with the direct addition of the carbon fiber, the carbon fiber-hydrogel composite material can greatly increase the compatibility with the system, the carbon fiber can form a three-dimensional connection in the system, the integrity of the asphalt concrete is stronger, the asphalt concrete is not easy to crack, and the water stability of the asphalt concrete is improved; and the carbon fiber itself has good mechanical strength, and the anti-rutting stability of the asphalt concrete is also improved; in combination of the two factors, the water resistance of the asphalt concrete is greatly improved, and the service life of the asphalt concrete is prolonged.

[0009] Preferably, the addition amount of the carbon fiber-hydrogel composite material is 12 parts by weight.

[0010] By adopting the technical scheme, when the addition amount of the carbon fiber-hydrogel composite material is relatively large, the three-dimensional structure is easily formed in the asphalt concrete system, the water absorption capacity of the asphalt is too large, and the too large water absorption capacity is still not conducive to the performance maintenance of the asphalt.

[0011] Preferably, the length of the carbon fiber is 1-3 cm.

[0012] By adopting the technical scheme, when the length of the carbon fiber is in the range, the asphalt concrete with relatively good water resistance and anti-rutting stability can be prepared.

[0013] Preferably, the preparation method of the carbon fiber-hydrogel composite material is as follows:

[0014] S1, 10-12 parts by weight of carbon fiber is added into 150-170 parts by weight of concentrated nitric acid with a mass fraction of 65%, ultrasonic dispersion is performed for 30-40 min, then the temperature is increased to 80-100℃, and reaction is performed for 2-4 h, then the precipitate is washed to neutral, and drying is performed, to obtain acid-treated carbon fiber;

[0015] S2, the acid treated carbon fiber obtained in S1 is mixed with 16-20 parts by weight of a vinyl silane coupling agent, then 120-140 parts by weight of ethanol is added, then acetic acid is added to adjust the pH of the system to 3-5, then ultrasonic treatment is performed for 30-40 min, then reaction is performed at 50-60°C for 4-6h, after the reaction is completed, filtration is performed, the precipitate is washed and dried to obtain a vinyl silane coupling agent grafted carbon fiber; S3, the vinyl silane coupling agent grafted carbon fiber is placed in 18-22 parts by weight of water, ultrasonic dispersion is performed, then 0.8-1.2 parts by weight of a vinyl silane coupling agent, 2.8-3.5 parts by weight of hydroxyethyl methacrylate and 10.5-11.5 parts by weight of N-vinyl pyrrolidone are added, the temperature is raised to 60-70°C, an initiator and a crosslinking agent are added, stirring is performed for 15-20 min, filtration is performed, and washing is performed to obtain a carbon fiber-hydrogel composite material; the parts by weight of the initiator added is 0.55-0.75% of the total mass of the monomers; the parts by weight of the crosslinking agent added is 1.0-1.4% of the total mass of the monomers.

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

[0017] As a preference: the initiator is sodium persulfate or ammonium persulfate.

[0018] As a preference: the crosslinking agent is ethylene glycol dimethacrylate.

[0019] As a preference: the filler is a mixture of organic bentonite and sepiolite, and the parts by weight ratio of the organic bentonite to the sepiolite is 2:1.

[0020] By adopting the technical scheme, the organic bentonite is an inorganic mineral / organic ammonium compound, and is prepared by using bentonite as raw material, inserting an organic coating agent through ion exchange technology by using the lamellar structure of montmorillonite in the bentonite and the characteristic that the montmorillonite can be dispersed into colloidal particles in water or an organic solvent. 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 viscosity of the asphalt is increased when the organic bentonite is added as a filler into the asphalt concrete system, and the flowability of the asphalt road is increased after water is encountered, and the asphalt is not easy to separate from the aggregate; similarly, the sepiolite can become soft after water is encountered, and can synergize with the organic bentonite, greatly improving the flowability and viscosity of the asphalt after water is encountered, and the integrity of the asphalt concrete is stronger, greatly preventing the cracking of the asphalt concrete; the two are added together, and the rutting resistance stability and water stability of the asphalt concrete can be greatly improved; and the carbon fiber itself has good mechanical strength, and also improves the rutting resistance stability of the asphalt concrete; the addition of the filler further improves the water stability and rutting resistance stability of the asphalt, and prolongs the service life of the asphalt concrete.

[0021] As preferred: the filler is treated by a silane coupling agent, and the specific treatment method is as follows:

[0022] 50-60 parts by weight of ethanol is added with 2-4 parts by weight of a silane coupling agent, and then 5-8 parts by weight of the filler is added, and stirring is performed for 24 h or more, and then filtration, washing and drying are performed, so that the filler treated by the silane coupling agent is obtained.

[0023] By adopting the technical scheme, the surface of the filler is treated by the silane coupling agent, the compatibility of the filler with the system is improved, the dispersibility of the filler is improved, and the water stability and rutting resistance stability of the asphalt concrete are improved.

[0024] In the second aspect, the application provides a preparation method of water-resistant asphalt concrete, and adopts the following technical scheme:

[0025] The preparation method of the water-resistant asphalt concrete comprises the following steps:

[0026] S1, the gravel, river sand and filler are mixed and stirred, and are dried at 90-100 DEG C to obtain a mixture A;

[0027] S2, the asphalt is heated to 130-150 DEG C, and then the carbon fiber-hydrogel composite material is added, and stirring is performed for 10-20 min, and then the mixture A is added and uniformly stirred to obtain the asphalt concrete.

[0028] By adopting the technical scheme, the asphalt concrete prepared by the preparation method has good water resistance and anti-rutting stability.

[0029] To sum up, the present application has at least one of the following beneficial technical effects:

[0030] 1. The present application adds carbon fiber-hydrogel composite material to asphalt, so that the asphalt has certain water absorption performance, and the water absorption responsiveness of the hydrogel is good, which can absorb water and swell in a relatively short time, and after swelling, the asphalt molecules can still maintain viscoelasticity, forming a strong extrusion force inside the system, effectively preventing water from further penetrating and diffusing inside; the more severe the water scouring of the external environment, the greater the pressure formed, and the more difficult the subsequent water penetration; thereby effectively improving the water scouring resistance of the product. On the other hand, the carbon fiber surface is loaded with hydrogel, which can greatly increase the compatibility with the system compared with directly adding carbon fiber. The carbon fiber can form a three-dimensional connection in the system, making the asphalt concrete more integral and less prone to cracking, thereby improving the water stability of the asphalt concrete. Through the above two factors, the water resistance of the asphalt concrete is greatly improved, and the service life of the asphalt concrete is prolonged.

[0031] 2. The present application adds organic bentonite as a filler to the asphalt concrete system, which can increase the viscosity of the asphalt, increase the flowability of the asphalt road after encountering water, and prevent the asphalt from separating from the aggregate. Similarly, sepiolite can become soft after encountering water, and can synergize with organic bentonite to greatly improve the flowability and viscosity of the asphalt after encountering water, making the asphalt concrete more integral and greatly preventing cracking of the asphalt concrete. The addition of both can greatly improve the anti-rutting stability and water stability of the asphalt concrete. Moreover, carbon fiber itself has good mechanical strength, which also improves the anti-rutting stability of the asphalt concrete. The addition of fillers further improves the water resistance and anti-rutting stability of the asphalt, thereby prolonging the service life of the asphalt concrete.

[0032] 3. The water immersion residual stability of the asphalt concrete prepared by the present application is all above 93.1%, and the maximum can reach 95.2%, and the freeze-thaw splitting residual strength ratio is between 88.9-91.0%; at the same time, the high-temperature stability, i.e. the anti-rutting stability, is between 6595-6668 times / mm; it is shown that the asphalt concrete of the present application has excellent water resistance and anti-rutting stability, which can greatly prolong the service life of the asphalt concrete. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below in combination with specific contents.

[0034] Raw materials

[0035] The raw materials used in the preparation examples and the embodiments of the present application are all common commercially available products.

[0036] Preparation Example

[0037] Preparation Example 1

[0038] A carbon fiber-hydrogel composite material is prepared by the following method:

[0039] S1, 11g of carbon fiber is added to 160g of 65% mass fraction concentrated nitric acid, ultrasonic dispersion for 35min, then heated to 90℃, reaction for 3h, then filtered, the precipitate is washed to neutral, dried, to obtain acid treated carbon fiber; wherein the length of the carbon fiber is 1cm;

[0040] 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 for 30min, then reaction at 55℃ for 5h, after the reaction is completed, filtering, washing the precipitate, drying, to obtain vinyl silane coupling agent grafted carbon fiber; wherein the vinyl silane coupling agent is vinyl triethoxysilane;

[0041] S3, the vinyl silane coupling agent grafted carbon fiber is put into 20g of water, ultrasonic dispersion, then 1.0g of vinyl silane coupling agent, 3g of hydroxyethyl methacrylate and 11g of N-vinyl pyrrolidone are added, heated to 65℃, initiator and crosslinking agent are added, stirring for 15min, filtering, washing by water immersion, then drying at 70℃, to obtain the carbon fiber-hydrogel composite material; wherein the initiator is ammonium persulfate, the crosslinking agent is ethylene glycol dimethacrylate; the mass of the initiator added is 0.65% of the total mass of the monomers; the mass of the crosslinking agent added is 1.2% of the total mass of the monomers.

[0042] Preparation Example 2

[0043] A carbon fiber-hydrogel composite material, which is different from the preparation example 1 in that the length of the carbon fiber is 2cm, and the remaining steps are the same as those of the preparation example 1.

[0044] Preparation Example 3

[0045] A carbon fiber-hydrogel composite material, which is different from the preparation example 1 in that the length of the carbon fiber is 3cm, and the remaining steps are the same as those of the preparation example 1.

[0046] Embodiment

[0047] Embodiment 1

[0048] A water-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:

[0049] S1, mix and stir the stone, river sand and filler, and dry at 100℃ to obtain mixture A;

[0050] S2, heat the asphalt to 140℃, then add the carbon fiber-hydrogel composite material, stir for 10 min, then add the mixture A, stir for 30 min to obtain the asphalt concrete;

[0051] wherein the asphalt is petroleum asphalt; the carbon fiber-hydrogel composite material is prepared by the preparation method in Preparation Example 1; the average particle size of the stone is 1 cm; the average particle size of the river sand is 0.2 cm; the filler is a mixture of organic bentonite and sepiolite, and the weight ratio of the organic bentonite to the sepiolite is 2:1.

[0052] Table 1: Amounts of each raw material (kg) for Example 1

[0053] Pitch 135 Carbon fiber-hydrogel composites 10 Stone 330 River sand 120 Filler 60

[0054] Example 2

[0055] A water-resistant asphalt concrete, which differs from Example 1 in that the carbon fiber-hydrogel composite material is prepared by the preparation method in Preparation Example 2, and the remaining steps are the same as those in Example 1.

[0056] Example 3

[0057] A water-resistant asphalt concrete, which differs from Example 1 in that the carbon fiber-hydrogel composite material is prepared by the preparation method in Preparation Example 3, and the remaining steps are the same as those in Example 1.

[0058] Example 4

[0059] A water-resistant asphalt concrete, which differs from Example 2 in that the amount of the carbon fiber-hydrogel composite material added is 12 kg, and the remaining steps are the same as those in Example 2.

[0060] Example 5

[0061] A water-resistant asphalt concrete, which differs from Example 2 in that the amount of the carbon fiber-hydrogel composite material added is 14 kg, and the remaining steps are the same as those in Example 2.

[0062] Example 6

[0063] A water-resistant asphalt concrete, which differs from Example 4 in that the filler added is treated with a silane coupling agent, and the method for treating the silane coupling agent is as follows:

[0064] In 55 kg of ethanol, 3 kg of silane coupling agent, type A171, was added, followed by 6.5 kg of filler, and the reaction was stirred for 24 h, then filtered, washed with ethanol, and dried at 100°C to obtain the silane coupling agent-treated filler.

[0065] Comparative Example

[0066] Comparative Example 1

[0067] A water-resistant asphalt concrete, which differs from Example 1 in that the carbon fiber-hydrogel composite material added is replaced with an equal amount of vinyl silane coupling agent grafted carbon fiber, and the remaining steps are the same as those of Example 1.

[0068] Comparative Example 2

[0069] A water-resistant asphalt concrete, which differs from Example 1 in that the carbon fiber-hydrogel composite material added is replaced with an equal amount of hydrogel particles, and the average size of the hydrogel particles after water loss is 1 mm 3 , and the remaining steps are the same as those of Example 1.

[0070] Comparative Example 3

[0071] A water-resistant asphalt concrete, which differs from Example 1 in that no carbon fiber-hydrogel composite material is added, and the remaining steps are the same as those of Example 1.

[0072] Comparative Example 4

[0073] A water-resistant asphalt concrete, which differs from Example 1 in that no filler is added, and the remaining steps are the same as those of Example 1.

[0074] Comparative Example 5

[0075] A water-resistant asphalt concrete, which differs from Example 1 in that the filler is an equal amount of sepiolite, and the remaining steps are the same as those of Example 1.

[0076] Comparative Example 6

[0077] A water-resistant asphalt concrete, which differs from Example 1 in that the filler is an equal amount of organic bentonite, and the remaining steps are the same as those of Example 1.

[0078] Performance Test

[0079] Test Method / Experimental Method

[0080] Water-resistant asphalt concrete was prepared according to the preparation methods of Examples 1-6 and Comparative Examples 1-6, respectively, and then tested according to the following test methods, and the test results are shown in Table 2.

[0081] Water stability and high temperature stability: the detection method is according to the detection method in JTGF40-2004 "Technical Specification for Construction of Highway Asphalt Pavement"; the high temperature stability reflects the anti-rutting stability and tensile strength of the asphalt concrete.

[0082] Table 2 detection results of examples 1-6 and comparative examples 1-6

[0083]

[0084] It can be seen from the detection data of examples 1-6 and comparative examples 1-6 and table 2 that the immersion residual stability of the asphalt concrete prepared in the application is all 93.1% and above, and the maximum can reach 95.2%, and the freeze-thaw splitting residual strength ratio is between 88.9-91.0%; at the same time, the high temperature stability, i.e. the anti-rutting stability, is between 6595-6668 times / mm; it shows that the asphalt concrete of the application has excellent water resistance and anti-rutting stability, which can greatly prolong the service life of the asphalt concrete.

[0085] The carbon fiber-hydrogel composite material is prepared by in-situ polymerization on the surface of carbon fiber, loading hydrogel, forming a hydrogel layer on the surface of carbon fiber, adding it into the asphalt concrete, so that the asphalt has a certain water absorption performance, and the water absorption responsiveness of the hydrogel is better, which can absorb water and swell in a relatively short time, and after swelling, the viscoelasticity of the asphalt molecules can still be maintained, forming a strong extrusion force inside the system, effectively preventing water from further penetrating and diffusing inside; and the more severe the external water scouring, the greater the pressure formed, and the more difficult the subsequent water penetration; thereby effectively improving the water scouring resistance of the product. On the other hand, compared with directly adding carbon fiber, the carbon fiber surface loaded with hydrogel can greatly increase the compatibility with the system, and the carbon fiber can form a three-dimensional connection in the system, making the asphalt concrete more integral and less prone to cracking, and the carbon fiber itself has good mechanical strength, also improving the anti-rutting stability of the asphalt concrete; in combination of the two factors, the water stability of the asphalt concrete is greatly improved.

[0086] It can be seen from the detection data of examples 1 and comparative examples 1-3 that adding vinyl silane coupling agent grafted carbon fiber or hydrogel particles can improve the immersion residual stability and freeze-thaw splitting residual strength of the asphalt concrete to a certain extent, but the water stability data of adding carbon fiber-hydrogel composite material is lower.

[0087] From the detection data of examples 1-3, it can be seen that the length of the carbon fiber used in the preparation of the carbon fiber-hydrogel composite material is an important parameter affecting the water stability of the asphalt concrete. The shorter length makes the asphalt concrete lack of overall performance, and the longer length makes the asphalt concrete form an interconnected three-dimensional network structure inside, which makes the hydrogel on the surface of the carbon fiber continuously absorb water and form a water-absorbing guiding structure. Therefore, the length of 2 cm is a relatively optimal choice. In combination with examples 4-5, the addition amount should not be too large, and the addition amount is preferably 12 kg.

[0088] The filler added in the present application is a mixture of sepiolite and organic bentonite. The organic bentonite is an inorganic mineral / organic ammonium composite, which is made by inserting an organic covering agent into bentonite through ion exchange technology, using the lamellar structure of montmorillonite in bentonite and its ability to swell and disperse into colloidal particles in water or organic solvents. The organic bentonite can form a gel in various 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 coating industry. By adding organic bentonite, it is found that adding it as a filler into the asphalt concrete system can increase the viscosity of asphalt, increase the flowability of asphalt road after encountering water, and prevent asphalt and aggregate from separating; similarly, sepiolite can become soft after encountering water, and can synergize with organic bentonite to greatly improve the flowability and viscosity of asphalt after encountering water, making the asphalt concrete more integral and greatly preventing the cracking of asphalt concrete; the addition of both can greatly improve the rutting resistance stability and water stability of asphalt concrete; the filler and the carbon fiber-hydrogel composite material work together to prolong the service life of the asphalt concrete.

[0089] From the detection data of examples 1 and comparative examples 4-6, it can be seen that the performance of the asphalt concrete prepared by simultaneously adding sepiolite and organic bentonite is better than that of the asphalt concrete prepared by adding sepiolite or organic bentonite alone. From the detection data of examples 4 and 6, it can be seen that treating the surface of the filler with a silane coupling agent can improve the compatibility of the filler with the system, improve the dispersibility of the filler, and thus improve the water stability and rutting resistance stability of the asphalt concrete.

[0090] The specific embodiments in the present application are merely an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, as long as the modifications are within the scope of the claims of the present application.

Claims

1. A water resistant asphalt concrete, characterized by: It comprises the following raw materials by weight: asphalt 120-150 parts, carbon fiber-hydrogel composite material 10-14 parts, stone 300-350 parts, river sand 100-150 parts and filler 50-70 parts; The average particle size of the stone is 0.7-1.5 cm; the average particle size of the river sand is 0.1-0.3 cm; The carbon fiber-hydrogel composite material 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 the vinyl silane coupling agent grafted carbon fiber with a vinyl silane coupling agent, hydroxyethyl methacrylate and N-vinyl pyrrolidone under the action of an initiator and a crosslinking agent.

2. A water resistant asphalt concrete according to claim 1, characterized in that: The addition amount of the carbon fiber-hydrogel composite material is 12 parts by weight.

3. The water resistant asphalt concrete of claim 1, wherein: The length of the carbon fiber is 1-3 cm.

4. The water resistant asphalt concrete of claim 1, wherein: The preparation method of the carbon fiber-hydrogel composite material is as follows: S1, 10-12 parts by weight of carbon fiber is added to 150-170 parts by weight of concentrated nitric acid with a mass fraction of 65%, ultrasonic dispersion is carried out for 30-40 min, then the temperature is raised to 80-100℃, and reaction is carried out for 2-4 h, then the precipitate is washed to neutral, and dried to obtain acid-treated carbon fiber; S2, the acid-treated carbon fiber obtained in S1 and 16-20 parts by weight of a vinyl silane coupling agent are mixed, then 120-140 parts by weight of ethanol is added, then acetic acid is added to adjust the pH value of the system to 3-5, then ultrasonic treatment is carried out for 30-40 min, then reaction is carried out at 50-60℃ for 4-6 h, after the reaction is completed, the precipitate is filtered, washed and dried to obtain vinyl silane coupling agent grafted carbon fiber; S3, the vinyl silane coupling agent grafted carbon fiber is placed in 18-22 parts by weight of water, ultrasonic dispersion is carried out, then 0.8-1.2 parts by weight of a vinyl silane coupling agent, 2.8-3.5 parts by weight of hydroxyethyl methacrylate and 10.5-11.5 parts by weight of N-vinyl pyrrolidone are added, the temperature is raised to 60-70℃, an initiator and a crosslinking agent are added, stirring is carried out for 15-20 min, then filtration is carried out, and washing is carried out to obtain the carbon fiber-hydrogel composite material; the weight parts of the initiator is 0.55-0.75% of the total weight parts of the monomers; the weight parts of the crosslinking agent is 1.0-1.4% of the total weight parts of the monomers.

5. A water resistant asphalt concrete according to claim 4, characterised in that: The vinyl silane coupling agent is vinyl triethoxysilane or vinyl trimethoxysilane.

6. A water resistant asphalt concrete according to claim 4, wherein: The initiator is sodium persulfate or ammonium persulfate.

7. A water resistant asphalt concrete according to claim 4, wherein: The crosslinking agent is ethylene glycol dimethacrylate.

8. The water resistant asphalt concrete of claim 1, wherein: The filler is a mixture of organic bentonite and sepiolite, and the weight parts ratio of the organic bentonite to the sepiolite is 2:

1.

9. A water resistant asphalt concrete according to claim 8, characterised in that: The filler is treated by a silane coupling agent, and the specific treatment method is as follows: 2-4 parts by weight of a silane coupling agent is added to 50-60 parts by weight of ethanol, then 5-8 parts by weight of the filler is added, stirring reaction is carried out for more than 24 h, then filtration is carried out, washing is carried out, and drying is carried out to obtain the silane coupling agent treated filler.

10. A method of producing a water-resistant bituminous concrete according to any one of claims 1 to 9, characterized in that: It comprises the following steps: S1, the stone, river sand and filler are mixed and stirred, and are dried at 90-100℃ to obtain a mixture A; S2, heating the asphalt to 130-150℃, then adding the carbon fiber-hydrogel composite material, stirring for 10-20 min, then adding the mixture A, stirring uniformly to obtain the asphalt concrete.

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