A bridge deck paving material, its preparation method and its paving method

Abstract

The present application provides a bridge deck paving material, a preparation method thereof and a paving method thereof. The bridge deck paving material includes: a first additive, a second additive, a filler and a modified asphalt; the mass ratio of the filler to the modified asphalt is (15-45):(36-90); the first additive is a carbonized porous polymer, the content of the first additive in the total mass is X, the content of the second additive in the total mass is Y, and X and Y satisfy the following relational expressions: 1.2X ≤ X + Y ≤ 5X; 1.4Y ≤ X + Y ≤ 3Y; a paving method in which the content of the heat-conducting fiber powder in the paving material from the lowest paving layer to the topmost paving layer is controlled to decrease successively, and the content of the rubber particles and the polymer material in the paving material from the lowest paving layer to the topmost paving layer is controlled to increase successively; the bridge deck paving material and the paving method provided by the present application have high water stability, high-temperature stability and low-temperature crack resistance.

Description

Technical Field

[0001] The present application belongs to the technical field of bridge deck paving materials, and specifically relates to a bridge deck paving material, a preparation method and a paving method thereof. Background Art

[0002] The defects of cement concrete bridge deck pavement, especially the defects of asphalt mixture pavement, have always been a difficult problem that troubles road workers. At the same time, it also leads to frequent maintenance of cement concrete bridge deck pavement, affecting traffic efficiency and safety, and consuming a lot of maintenance funds.

[0003] Asphalt has long been used for waterproofing, sealing materials and road repairs due to its good adhesion, anti-aging and waterproof capabilities. As a traditional waterproof material, it is still widely used today. Asphalt has good elasticity and plasticity, which is conducive to stable vehicle driving. However, when loaded with heavy vehicles, it is easy to cause local depression on ordinary asphalt pavement, affecting subsequent vehicle driving. In order to increase the performance of the pavement after asphalt paving, epoxy resin is often added to the raw material configuration to meet the high strength and high viscosity requirements of asphalt.

[0004] Therefore, it is of great significance to obtain a bridge deck paving material that has water stability, high temperature stability, and low temperature crack resistance. Summary of the invention

[0005] The present application provides a bridge deck paving material, a preparation method and a paving method thereof, which are used to solve the technical problems in the prior art of poor water stability, poor high temperature durability, and easy cracking under low temperature conditions of bridge deck paving materials.

[0006] In a first aspect, the present application provides a bridge deck paving material, the bridge deck paving material comprising: a first additive, a second additive, a filler and modified asphalt; the mass ratio of the filler to the modified asphalt is (15-45): (36-90);

[0007] The first additive is a carbonized porous polymer, and the porous polymer is as follows:

[0008]

[0009] The second additive is of formula A:

[0010]

[0011] The ratio of the content of the first additive to the total mass is X, the ratio of the content of the second additive to the total mass is Y, and X and Y satisfy the following relationship:

[0012] 1.2X≤X+Y≤5X;

[0013] 1.4Y ≤ X + Y ≤ 3Y.

[0014] In an optional embodiment, the filler includes rubber particles, mineral powder, thermally conductive fiber powder, and polymer material;

[0015] The mass fraction ratio of the rubber particles, mineral powder, thermally conductive fiber powder, and polymer material is (1 - 8):(10 - 35):(0.5 - 5):(1 - 10);

[0016] The particle size of the rubber particles is one or several of rubber powder with a particle size less than or equal to 0.8 mm, waste rubber powder, sulfur - containing rubber powder, or sulfur - containing waste rubber powder in any proportion.

[0017] In an optional embodiment, the modified asphalt is obtained by modifying asphalt with an asphalt modifier;

[0018] The asphalt modifier is sulfonated humic acid - formaldehyde - sulfonated acetone polymer, polyether polyol diglycidyl ether, aluminosilicate fiber, diatomite, sodium alginate, rubber powder, and polyethylene wax;

[0019] The mass ratio of the sulfonated humic acid - formaldehyde - sulfonated acetone polymer, polyether polyol diglycidyl ether, aluminosilicate fiber, diatomite, sodium alginate, rubber powder, and polyethylene wax is (3 - 8):(0.5 - 5):(0.2 - 4):(2 - 6):(1.5 - 5):

[0020] (1 - 4):(0.5 - 3).

[0021] In an optional embodiment, the mineral powder includes basalt particles and limestone particles;

[0022] The mass ratio of the basalt particles and the limestone particles is (20 - 40):(10 - 25);

[0023] The particle size of the basalt particles includes basalt particles with a size of 10 - 13 mm and basalt particles with a size of 4 - 8 mm;

[0024] The mass ratio of the 10 - 13 mm basalt particles and the 4 - 8 mm basalt particles is (2 - 6):(7 - 15);

[0025] The particle size of the limestone particles includes limestone particles with a size of 2 - 5.5 mm and limestone particles with a size less than 2 mm;

[0026] The mass ratio of the 2 - 5.5 mm limestone particles and the limestone particles with a size less than 2 mm is (1 - 5):(4 - 20).

[0027] In an alternative embodiment, the polymer material comprises an epoxy resin and an acrylonitrile-butadiene-styrene copolymer;

[0028] The mass ratio of the epoxy resin to the acrylonitrile-butadiene-styrene copolymer is (2 to 5):(1 to 2);

[0029] The epoxy resin is a bisphenol A epoxy resin or a bisphenol F epoxy resin.

[0030] In an alternative embodiment, the axial thermal conductivity of the thermally conductive fiber powder is greater than or equal to 300 W / m·K;

[0031] The average length of the thermally conductive fiber powder is 200 to 600 micrometers;

[0032] The modulus of the thermally conductive fiber powder is 800 to 1500 GPa; the elongation at break of the thermally conductive fiber powder is 0.2% to 0.6%.

[0033] In a second aspect, the present application provides a method for preparing a bridge deck paving material, the preparation method comprising:

[0034] Placing the mineral powder at 150°C to 180°C for heat preservation for 2 to 6 hours, then heating to 170°C to 190°C and adding rubber particles and thermally conductive fiber powder for stirring for 1 to 2 hours;

[0035] Adding a modified asphalt and a polymer material in a certain mass ratio at this temperature and continuously stirring;

[0036] Adding a first additive and a second additive in the ratio of 1.2X ≤ X + Y ≤ 5X, 1.4Y ≤ X + Y ≤ 3Y, and stirring and mixing at this temperature to obtain a paving material.

[0037] In an alternative embodiment, the stirring time from adding the modified asphalt and the polymer material to obtaining the paving material does not exceed 15 minutes.

[0038] In a third aspect, the present application provides a paving method for a bridge deck paving material, the paving method comprising:

[0039] After cleaning the bridge deck layer to be paved, laying the paving material to 1 / 6 to 1 / 3 of the total paving thickness;

[0040] Using a plate vibrator for primary flattening, and adding a magnet on the plate vibrator, and then using a rubber-tyred roller for rolling;

[0041] Continuing to pave the paving material to 1 / 6 to 1 / 3 of the total thickness, and successively rolling with a plate vibrator with a magnet added and a rubber-tyred roller, and repeating the above method until the laying thickness is reached;

[0042] The content of the heat-conducting fiber powder in the paving material from the lowest paving layer to the topmost paving layer is controlled to decrease successively, and the contents of the rubber particles and the polymer material in the paving material from the lowest paving layer to the topmost paving layer are controlled to increase successively.

[0043] In an alternative embodiment, the magnetic poles of the magnets added to the plate vibrator are in the same direction, and the magnetic field strength of the magnets is greater than or equal to 1000 gauss.

[0044] This application provides a bridge deck paving material, a preparation method thereof, and a paving method thereof. The bridge deck paving material includes: a first additive, a second additive, a filler, and a modified asphalt; the mass ratio of the filler to the modified asphalt is (5-10):(36-90); the first additive is a carbonized porous polymer, the content of the first additive in the total mass is X, the content of the second additive in the total mass is Y, and X and Y satisfy the following relationship: 1.2X ≤ X + Y ≤ 5X; 1.4Y ≤ X + Y ≤ 3Y; after cleaning the bridge deck to be paved, the paving material is laid to 1 / 6 to 1 / 3 of the total paving thickness; a plate vibrator is used for primary flattening, and magnets are added to the plate vibrator, and then a rubber-tyred roller is used for rolling; the paving material is continuously paved to 1 / 6 to 1 / 3 of the total thickness, and the plate vibrator with added magnets and the rubber-tyred roller are used for rolling in sequence, and the above method is repeated until the paving thickness is reached; a paving method in which the content of the heat-conducting fiber powder in the paving material from the lowest paving layer to the topmost paving layer is controlled to decrease successively, and the contents of the rubber particles and the polymer material in the paving material from the lowest paving layer to the topmost paving layer are controlled to increase successively; the bridge deck paving material and the paving method provided by this application have high water stability, high-temperature stability, and low-temperature crack resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application.

[0046] Figure 1 It is a process flow chart of a preparation method of a bridge deck paving material provided by this application;

[0047] Figure 2 It is a flow chart of a paving method of a bridge deck paving material provided by this application.

[0048] Through the above accompanying drawings, the clear embodiments of this application have been shown, and there will be more detailed descriptions hereinafter. These drawings and the text description are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0049] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] The defects of cement concrete bridge deck pavement, especially the defects of asphalt mixture pavement, have always been a difficult problem that troubles road workers. At the same time, it also leads to frequent maintenance of cement concrete bridge deck pavement, affecting traffic efficiency and safety, and consuming a lot of maintenance funds.

[0052] Asphalt has long been used for waterproofing, sealing materials and road repairs due to its good adhesion, anti-aging and waterproof capabilities. As a traditional waterproof material, it is still widely used today. Asphalt has good elasticity and plasticity, which is conducive to stable vehicle driving. However, when loaded with heavy vehicles, it is easy to cause local depression on ordinary asphalt pavement, affecting subsequent vehicle driving. In order to increase the performance of the pavement after asphalt paving, epoxy resin is often added to the raw material configuration to meet the high strength and high viscosity requirements of asphalt.

[0053] Therefore, it is of great significance to obtain a bridge deck paving material that has water stability, high temperature stability, and low temperature crack resistance.

[0054] This application provides a bridge deck paving material, a preparation method and a paving method thereof, aiming to solve the technical problems of poor water stability, poor high temperature durability, easy cracking under low temperature conditions, etc. of the bridge deck paving material in the prior art. This application prepares the paving material by using a first additive, a second additive, a filler and modified asphalt, and paving it by using a paving method with different gradients under a magnetic field, thereby solving the technical problems of poor water stability, poor high temperature durability, etc. of the paving material in the prior art.

[0055] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0056] It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0057] It should be noted that in the description of the present invention, the terms "first", "second", "third", "fourth", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here.

[0058] The asphalt used in this application can be selected from asphalt AH-70 or asphalt AH-90; other components and ingredients of this application can be purchased in the market. After those skilled in the art see this application, they can understand and implement it.

[0059] The porous polymer can be prepared by, but not limited to, the following preparation methods:

[0060] (1) Add phthalimide and bromobenzene with a molar ratio of 1:1, and a CuI catalyst to an ethanol solution; after fully reacting at 80-90 °C and cooling to room temperature, dissolve it in DMF, wash and filter by suction with methanol and dichloromethane, and dry in vacuum;

[0061] (2) Grind and mix the product in (1) with NaOH evenly under an infrared lamp, heat from room temperature to 550 °C at a heating rate of 4 °C / min under nitrogen protection and hold for 40 h, cool to room temperature after the reaction is completed to obtain a black powder; grind it and put it into deionized water, stir and filter by suction, and obtain a porous polymer after filtering and drying.

[0062] Figure 1 A preparation method of a bridge deck paving material provided for the embodiments of the present application, as Figure 1 shown, the preparation method includes:

[0063] S101. Place the mineral powder at 150 °C to 180 °C for heat preservation for 2 to 6 h, then raise the temperature to 170 °C to 190 °C and add rubber particles and thermal conductive fiber powder for stirring for 1 to 2 h;

[0064] S102. Add a modified asphalt and a polymer material in a certain mass ratio at this temperature and continue stirring;

[0065] S103. Add the first additive and the second additive in the proportion of 1.2X ≤ X + Y ≤ 5X and 1.4Y ≤ X + Y ≤ 3Y, and stir and mix at this temperature to obtain the paving material.

[0066] In the embodiment of the present application, the paving material uses the first additive and the second additive. On the one hand, the addition of the first additive and the second additive can crosslink and cure the polymer material, and at the same time can improve the water stability of the paving material; and because the carbonized first additive has porosity and high-temperature resistance, it can improve the high-temperature resistance of the paving material; when the addition content ratio of the first additive and the second additive is guaranteed to be 1.2X ≤ X + Y ≤ 5X and 1.4Y ≤ X + Y ≤ 3Y, the performance of the paving material reaches the best, and when it is not within this range, its performance will be affected.

[0067] In the present application, thermal conductive fiber powder, the first additive and the second additive are also used to enhance the bonding effect between the polymer material and the modified asphalt, so that the overall bonding strength and toughness of the paving material are improved, and further the water stability performance and low-temperature performance of the paving material are enhanced, and the thermal conductive fiber, the first additive and the second additive play a synergistic role.

[0068] Figure 2 This is a paving method for a bridge deck paving material provided by an embodiment of the present application; as Figure 2 shown, the paving method includes:

[0069] S201. After cleaning the bridge deck to be paved, lay the paving material to 1 / 6 to 1 / 3 of the total paving thickness;

[0070] S202. Use a flat vibrator for primary flattening, and add a magnet to the flat vibrator, and then use a rubber-tyred roller for rolling;

[0071] S203. Continue to lay the paving material to 1 / 6 to 1 / 3 of the total thickness, and use a flat vibrator with a magnet and a rubber-tyred roller to roll in turn, and repeat the above method until the laying thickness is reached;

[0072] S204. Control the content of the thermal conductive fiber powder in the paving material from the lowest laying layer to the topmost laying layer to decrease in turn, and control the content of the rubber particles and the polymer material in the paving material from the lowest laying layer to the topmost laying layer to increase in turn.

[0073] In the embodiment of the present application, in the paving method, first, since the paving material contains heat-conducting fiber powder, and the fibers in the heat-conducting fiber powder have excellent heat-conducting functions in the radial direction, during the paving process, the method of layer-by-layer paving is adopted, and a flat vibrator with a magnetic field is used for primary rolling, ensuring that as many fibers as possible in the heat-conducting fiber powder are perpendicular to the bridge deck in the radial direction. So that after the paving material is paved, in the case of high temperature, the internal heat can be dissipated through the heat-conducting fiber powder, and the paving material is prevented from being damaged by high temperature; at the same time, the content of the heat-conducting fiber powder in the paving material from the lowest laying layer to the topmost laying layer is controlled to decrease successively. This is because after the heat of the bottom layer accumulates, due to the difficulty of heat dissipation, a higher density of heat-conducting fiber powder can ensure that the heat of the internal bottom layer is dissipated as soon as possible, further ensuring that the paving material is not damaged by high temperature after paving.

[0074] Moreover, in the paving method, the content of rubber particles and polymer materials in the paving material from the lowest laying layer to the topmost laying layer is also controlled to increase successively. This is because the heat dissipation performance of polymer materials such as rubber is relatively poor. A relatively low content in the bottom layer can ensure the optimal performance of the heat-conducting fiber powder, and a higher content in the top layer can improve the water stability and low-temperature crack resistance of the paving material after paving.

[0075] The present application provides a bridge deck paving material, a preparation method thereof and a paving method. The bridge deck paving material includes: a first additive, a second additive, a filler and a modified asphalt; the mass ratio of the filler to the modified asphalt is (5 - 10):(36 - 90); the first additive is a carbonized porous polymer, the ratio of the content of the first additive to the total mass is X, the ratio of the content of the second additive to the total mass is Y, and X and Y satisfy the following relationship: 1.2X ≤ X + Y ≤ 5X; 1.4Y ≤ X + Y ≤ 3Y; After cleaning the bridge deck layer to be paved, the paving material is laid to 1 / 6 - 1 / 3 of the total paving thickness; a flat vibrator is used for primary flattening, and a magnet is added to the flat vibrator, and then a rubber-tyred roller is used for rolling; the paving material is continuously paved to 1 / 6 - 1 / 3 of the total thickness, and a flat vibrator with a magnet and a rubber-tyred roller are used for rolling in turn, repeating the above method until the laying thickness is reached; a paving method in which the content of the heat-conducting fiber powder in the paving material from the lowest laying layer to the topmost laying layer is controlled to decrease successively, and the content of the rubber particles and polymer materials in the paving material from the lowest laying layer to the topmost laying layer is controlled to increase successively; the bridge deck paving material and the paving method provided by the present application have high water stability, high-temperature stability and low-temperature crack resistance.

[0076] Furthermore, specifically, the components and mass parts ratios in the preparation method of the paving material provided in the embodiment of the present application are shown in Table 1.

[0077] Table 1. Component ratios in Examples 1 - 3 and Comparative Examples 1 - 5

[0078]

[0079] Note: For the components not listed in Table 1 in the embodiments and comparative examples of this application, the proportions defined in this application are used for addition, and they are not listed one by one here.

[0080] The paving materials prepared by the above preparation methods for Examples 1 to 3 and Comparative Examples 1 to 5 are paved by the above paving method, and then the following performance test experiments are carried out. The test results are shown in Table 2. In addition, the following comparative examples are also carried out to test the influence of the paving method on the performance of the paved paving materials.

[0081] Comparative Example 6

[0082] The paving material of this comparative example has the same proportion and preparation method as the paving material in Example 1, and the difference is only that in steps S202 and S203 of the paving method, a flat vibrator with a magnet is not used for primary flattening, and a rubber-tyred roller is directly used for rolling and flattening.

[0083] Comparative Example 7

[0084] The paving material of this comparative example has the same proportion and preparation method as the paving material in Example 1, and the difference is only that in step S204 of the paving method, the content of the heat-conducting fiber powder in the paving material from the lowest laying layer to the topmost laying layer is not controlled to decrease sequentially, and at the same time, the content of the rubber particles and polymer materials in the paving material from the lowest laying layer to the topmost laying layer is not controlled to increase sequentially.

[0085] Performance test experiment :

[0086] After the paving materials in Examples 1 to 3 and Comparative Examples 1 to 7 are prepared by the preparation method and paved by the paving method, the low-temperature performance test is carried out by the test method T0715-2011, the high-temperature durability performance test is carried out at 60 °C by the test method JTGE20-2011, and the residue stability performance test is carried out by the test method JTG E20—2011;

[0087] The above low-temperature performance, high-temperature durability performance and residue stability test results are shown in Table 2,

[0088] Table 2. Test results:

[0089]

[0090]

[0091] As can be seen from Table 2, the paving material provided by the present application has excellent comprehensive performance, and its comprehensive performance reaches the optimal level through the paving method provided by the present application; it should also be noted that other performances of the paving material in the present application can all reach the usage level in the art, and will not be elaborated one by one here.

[0092] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A bridge deck paving material, characterized in that: include: A first additive, a second additive, a filler and modified asphalt; the filler comprises rubber particles, mineral powder, thermal conductive fiber powder and polymer material, the polymer material comprises epoxy resin and acrylonitrile-butadiene-styrene copolymer; the modified asphalt is modified by an asphalt modifier; The asphalt modifier is sulfonated humic acid-formaldehyde-sulfonated acetone polymer, polyether polyol diglycidyl ether, aluminum silicate fiber, diatomaceous earth, sodium alginate, rubber powder and polyethylene wax; The mass ratio of the filler to the modified asphalt is (15-45): (36-90); The first additive is a carbonized porous polymer, and the porous polymer is as follows: The second additive is of formula A: The ratio of the content of the first additive to the total mass is X, the ratio of the content of the second additive to the total mass is Y, and X and Y satisfy the following relationship: 1.2X≤X+Y≤5X; 1.4Y≤X+Y≤3Y.

2. The paving material according to claim 1, characterized in that: The mass fraction ratio of the rubber particles, mineral powder, thermal conductive fiber powder and polymer material is (1-8): (10-35): (0.5-5): (1-10).

3. The paving material according to claim 2, characterized in that: The rubber particles are rubber powders with a particle size less than or equal to 0.8 mm.

4. The paving material according to claim 1, characterized in that: The mass ratio of the sulfonated humic acid-formaldehyde-sulfonated acetone polymer, polyether polyol diglycidyl ether, aluminum silicate fiber, diatomaceous earth, sodium alginate, rubber powder and polyethylene wax is (3-8): (0.5-5): (0.2-4): (2-6): (1.5-5): (1-4): (0.5-3).

5. The paving material according to claim 1, characterized in that: The mineral powder includes basalt particles and limestone particles; The mass ratio of the basalt particles to the limestone particles is (20-40):(10-25).

6. The paving material according to claim 5, characterized in that: The particle sizes of the basalt particles include basalt particles of 10 to 13 mm and basalt particles of 4 to 8 mm; And / or, the mass ratio of the 10-13 mm basalt particles to the 4-8 mm basalt particles is (2-6):(7-15); And / or, the particle size of the limestone particles includes limestone particles of 2 to 5.5 mm and limestone particles smaller than 2 mm; And / or, the mass ratio of the limestone particles having a size of 2 to 5.5 mm to the limestone particles having a size smaller than 2 mm is (1 to 5): (4 to 20).

7. The paving material according to claim 1, characterized in that: The mass ratio of the epoxy resin to the acrylonitrile-butadiene-styrene copolymer is (2-5): (1-2); The epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin.

8. The paving material according to claim 2, characterized in that: The axial thermal conductivity of the thermally conductive fiber powder is greater than or equal to 300 W / m·K; And / or, the average length of the thermally conductive fiber powder is 200 to 600 microns; And / or, the modulus of the thermally conductive fiber powder is 800-1500 GPa; the elongation at break of the thermally conductive fiber powder is 0.2%-0.6%.

9. A method for preparing a paving material according to any one of claims 1 to 8, characterized in that: The steps include: Place the mineral powder at 150℃~180℃ for 2~6h, then heat it to 170℃~190℃ and add rubber particles and thermal conductive fiber powder and stir for 1~2h; Add modified asphalt and polymer materials in a certain mass ratio at the temperature and continue stirring; The first additive and the second additive are added in a ratio of 1.2X≤X+Y≤5X, 1.4Y≤X+Y≤3Y, and stirred and mixed at the temperature to obtain a paving material.

10. The preparation method according to claim 9, characterized in that: The mixing time from adding the modified asphalt and the polymer material to obtaining the paving material shall not exceed 15 minutes.

11. A bridge deck paving method, using the paving material according to any one of claims 1 to 8, and / or the paving material prepared by the preparation method according to claim 9 or 10, characterized in that: The steps include: After cleaning the bridge deck to be paved, lay the paving material to 6 / 1 to 1 / 3 of the total paving thickness; Use a flat plate vibrator for primary flattening, add magnets to the flat plate vibrator, and then use a rubber-wheel roller for rolling; Continue to pave 6 / 1 to 1 / 3 of the total thickness of the paving material, use a flat plate vibrator with a magnet and a rubber-wheel roller to roll it in sequence, and repeat the above method until the paving thickness is reached; The content of thermal conductive fiber powder in the paving material from the lowest paving layer to the top paving layer is controlled to decrease successively, and the content of rubber particles and polymer materials in the paving material from the lowest paving layer to the top paving layer is controlled to increase successively.

12. The paving method according to claim 11, characterized in that: The magnetic poles of the magnets added to the flat vibrator are in the same direction, and the field strength of the magnets is greater than or equal to 1000 Gauss.

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