Epoxy asphalt and asphalt mixture for paving steel bridge deck in marine environment

Abstract

The invention relates to the technical field of road traffic, and particularly discloses an epoxy asphalt and asphalt mixture for steel bridge deck pavement in a marine environment, the epoxy asphalt and asphalt mixture comprises the following components: epoxy resin, asphalt and a modifier system, the epoxy resin is bisphenol A epoxy resin; the asphalt is 70 # road petroleum asphalt; the modifier system comprises an interface compatilizer, an anti-corrosion reinforcing agent and a dynamic repairing agent. According to the invention, chloride ions are effectively inhibited from invading into the pavement layer, the problem of insufficient compatibility of an epoxy resin phase and an asphalt phase is effectively solved, and self-repairing of cracks can be realized.

Description

Technical Field

[0001] This invention relates to the field of road traffic technology, and in particular to an epoxy asphalt and asphalt mixture for steel bridge deck paving in marine environments. Background Technology

[0002] Since the beginning of this century, epoxy asphalt and its mixtures have been widely used in the pavement engineering of long-span steel bridges due to their high modulus and good durability. However, during long-term service, epoxy asphalt pavement on steel bridge decks is prone to cracks, potholes, and other damage, severely limiting its service life. Existing technologies mainly focus on improving the flexibility, compatibility, and curing behavior of epoxy asphalt materials. For example, by adding solid particles or thermoplastic elastomers to improve the flexibility of epoxy asphalt binders and alleviate early cracking caused by excessive brittleness; by adding compatibilizers to the formulation to improve the bonding performance between epoxy resin and asphalt, thereby avoiding phase separation and improving the structural stability of the system; and by using different types of curing systems to improve the cross-linked network formed after curing, thereby improving the overall performance of epoxy asphalt materials. In addition, some studies have explored the addition of anti-aging agents, toughening agents, and other modifiers to improve the service performance of epoxy asphalt materials under complex climatic environments and high traffic loads. These technologies have, to some extent, promoted the application of epoxy asphalt in the field of steel bridge deck paving, and provided feasible improvement ideas for solving the problems of insufficient crack resistance and limited durability of traditional epoxy asphalt materials.

[0003] Although existing epoxy asphalt materials have made some progress in improving crack resistance, they still exhibit significant shortcomings in marine environments. On the one hand, the marine environment is characterized by high concentrations of chloride ions and acid rain. Current technologies lack targeted modification solutions, making it difficult to effectively prevent chloride ions from penetrating the pavement layer or neutralize the corrosive effects of acidic media, leading to easy deterioration of steel bridge deck pavements during long-term service. On the other hand, as a typical thermosetting material, traditional epoxy asphalt lacks self-healing capabilities once cracks occur. Microcracks easily expand into macrocracks under load and environmental influences, accelerating disease development and shortening the pavement's service life. Furthermore, some modified formulations involve complex preparation processes, easily resulting in uneven dispersion or phase separation, which not only increases the difficulty of engineering applications but also leads to instability in the overall performance of epoxy asphalt. In conclusion, existing epoxy asphalt materials cannot simultaneously achieve corrosion resistance, crack resistance, and self-healing properties, resulting in poor long-term service performance in marine environments. Therefore, there is an urgent need to develop an epoxy asphalt material that combines corrosion resistance, excellent crack resistance, and self-healing properties to improve the service durability of steel bridge deck pavement in marine environments. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and to propose an epoxy asphalt and asphalt mixture for steel bridge deck paving in marine environments.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An epoxy asphalt for steel bridge deck paving in a marine environment comprises the following components: epoxy resin, asphalt, and a modifier system.

[0007] Preferably, the epoxy resin is a bisphenol A type epoxy resin; the asphalt is 70# road petroleum asphalt; and the modifier system includes an interface compatibilizer, a corrosion inhibitor, and a dynamic repair agent.

[0008] Preferably, the modifier system accounts for 0.3 to 1.5 parts by weight of the total mass of epoxy asphalt, including 3 to 8 parts of interface compatibilizer, 1 to 5 parts of corrosion inhibitor, and 0.5 to 2 parts of dynamic repair agent.

[0009] Preferably, the interface compatibilizer is a polyetheramine-alkylphenol resin block copolymer; the corrosion inhibitor is zinc-doped vermiculite nanosheets; and the dynamic repair agent is furan / maleimide microcapsules.

[0010] Preferably, the polyetheramine-alkylphenol resin block copolymer has a molecular weight of 2000-5000, the zinc-doped vermiculite nanosheets have an interlayer spacing of 1.2-1.8 nm, the furan / maleimide microcapsules have a particle size of 5-20 μm, and the capsule wall is a polyurethane-silica hybrid membrane.

[0011] Preferably, the polyetheramine-alkylphenol resin block copolymer contains 40-60 wt% polyetheramine segments and C12-C18 straight-chain alkyl groups; the zinc-doped vermiculite nanosheets have a zinc ion loading of 5-8 wt%; the furan / maleimide microcapsule has a furan / maleimide molar ratio of 1:1.2-1.5 in its core and 10-30% silica nanoparticles in its capsule wall by mass of polyurethane.

[0012] An asphalt mixture for steel bridge deck paving in a marine environment includes the aforementioned epoxy asphalt for steel bridge deck paving in a marine environment, and also includes mineral aggregates and corrosion-resistant reinforcing mineral powder.

[0013] Preferably, the amount of epoxy asphalt used is 4.5 to 7.5% of the aggregate mass.

[0014] Preferably, the mineral material comprises 70-80 parts by weight of basalt grade material and 20-30 parts of limestone manufactured sand, wherein the particle size of the basalt grade material is 4.75mm-16mm.

[0015] Preferably, the corrosion-resistant and reinforcing mineral powder is 1-3% of the total mass of silane coupling agent modified Mg(OH)2 powder. The particle size of the silane coupling agent modified Mg(OH)2 powder is ≤0.075mm.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. Existing epoxy asphalt is susceptible to chloride ion corrosion in marine environments, resulting in insufficient durability of the pavement layer. This invention introduces zinc-doped vermiculite nanosheets into epoxy asphalt. By utilizing the ion exchange reaction between zinc ions and chloride ions in the layered structure of the nanosheets, an active anti-corrosion mechanism is formed, thereby effectively inhibiting the intrusion of chloride ions into the pavement layer.

[0018] 2. Existing epoxy asphalt suffers from insufficient compatibility between the epoxy resin phase and the asphalt phase, leading to phase separation and affecting performance stability. This invention utilizes a block copolymer as an interfacial compatibilizer. The polyetheramine segments in this copolymer can chemically bond with the epoxy resin phase, while the alkylphenol segments can embed into the asphalt phase, effectively solving the problem of insufficient compatibility between the epoxy resin phase and the asphalt phase.

[0019] 3. Existing epoxy asphalt lacks self-healing ability after cracks appear and fails rapidly. This invention disperses polyurethane-silica hybrid microcapsules in epoxy asphalt. The microcapsule walls have high strength, capable of resisting the shearing action of vehicle loads and remaining intact; when cracks appear in the pavement, the microcapsule core is released, triggering a reversible reaction, thereby achieving self-healing of the cracks.

[0020] 4. Direct mixing of the modifier with epoxy asphalt may result in uneven dispersion, affecting the modification effect. This invention employs a staged addition method for the modifier in its preparation process; that is, the modifier is first dispersed in the asphalt before being mixed with the epoxy resin.

[0021] 5. Traditional limestone powder in asphalt mixtures is easily eroded in marine environments. This invention utilizes silane-modified Mg(OH)2 mineral powder to replace traditional limestone powder as a functional filler, which can not only improve the bonding performance of the aggregate-mortar interface, but also react and neutralize with acidic media under marine acid rain conditions (pH≈4.5). Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] Example 1: (1) In this example, an epoxy asphalt for steel bridge deck paving in a marine environment is made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0024] (2) The modifier system in this embodiment is made from the following raw materials: 5 parts of interface compatibilizer, 3 parts of corrosion inhibitor, and 1 part of dynamic repair agent.

[0025] (3) In this embodiment, the interface compatibilizer is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.4nm and a zinc ion loading of 6.5wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0026] (4) The preparation of epoxy asphalt for steel bridge deck paving in marine environment in this embodiment includes the following steps:

[0027] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0028] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0029] Step 3: The mixture is sheared at 3000 rpm for 20 minutes at 140℃ using a high-speed shearing machine, followed by vacuum degassing for 30 minutes to obtain an epoxy asphalt for steel bridge deck paving in a marine environment.

[0030] Example 2: (1) In this example, an epoxy asphalt for steel bridge deck paving in a marine environment is made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0031] (2) The modifier system in this embodiment is made from the following raw materials: 5 parts of interface compatibilizer, 3 parts of corrosion inhibitor, and 1 part of dynamic repair agent.

[0032] (3) In this embodiment, the interface compatibilizer is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 1500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.4nm and a zinc ion loading of 6.5wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0033] (4) The preparation of epoxy asphalt for steel bridge deck paving in marine environment in this embodiment includes the following steps:

[0034] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0035] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0036] Step 3: The mixture is sheared at 3000 rpm for 20 minutes at 140℃ using a high-speed shearing machine, followed by vacuum degassing for 30 minutes to obtain an epoxy asphalt for steel bridge deck paving in a marine environment.

[0037] Example 3: (1) In this example, an epoxy asphalt for steel bridge deck paving in a marine environment is made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0038] (2) The modifier system in this embodiment is made from the following raw materials: 5 parts of interface compatibilizer, 3 parts of corrosion inhibitor, and 1 part of dynamic repair agent.

[0039] (3) In this embodiment, the interface compatibilizer is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.0nm and a zinc ion loading of 6.5wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0040] (4) The preparation of epoxy asphalt for steel bridge deck paving in marine environment in this embodiment includes the following steps:

[0041] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0042] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0043] Step 3: The mixture is sheared at 3000 rpm for 20 minutes at 140℃ using a high-speed shearing machine, followed by vacuum degassing for 30 minutes to obtain an epoxy asphalt for steel bridge deck paving in a marine environment.

[0044] Example 4: (1) In this example, an epoxy asphalt for steel bridge deck paving in a marine environment is made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0045] (2) The modifier system in this embodiment is made from the following raw materials: 5 parts of interface compatibilizer, 3 parts of corrosion inhibitor, and 1 part of dynamic repair agent.

[0046] (3) In this embodiment, the interface compatibilizer is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.4nm and a zinc ion loading of 6.5wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 25μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0047] (4) The preparation of epoxy asphalt for steel bridge deck paving in marine environment in this embodiment includes the following steps:

[0048] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0049] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0050] Step 3: The mixture is sheared at 3000 rpm for 20 minutes at 140℃ using a high-speed shearing machine, followed by vacuum degassing for 30 minutes to obtain an epoxy asphalt for steel bridge deck paving in a marine environment.

[0051] Example 5: (1) The epoxy asphalt for steel bridge deck paving in this example is made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0052] (2) The modifier system in this embodiment is made from the following raw materials: 5 parts of interface compatibilizer, 3 parts of corrosion inhibitor, and 1 part of dynamic repair agent.

[0053] (3) In this embodiment, the interface compatibilizer is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.4nm and a zinc ion loading of 6.5wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15μm, a core-to-core furan / maleimide molar ratio of 1:1, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0054] (4) The preparation of epoxy asphalt for steel bridge deck paving in marine environment in this embodiment includes the following steps:

[0055] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0056] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0057] Step 3: The mixture is sheared at 3000 rpm for 20 minutes at 140℃ using a high-speed shearing machine, followed by vacuum degassing for 30 minutes to obtain an epoxy asphalt for steel bridge deck paving in a marine environment.

[0058] Comparative Example 1: (1) This comparative example is an epoxy asphalt made from the following raw materials: 40 parts of E-51 epoxy resin and 60 parts of Jiangsu Xinhai 70# road petroleum asphalt.

[0059] (2) The epoxy asphalt of this comparative example includes the following steps:

[0060] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches a liquid flow state.

[0061] Step 2: Heat the epoxy resin to 60°C, add it to the 70# road petroleum asphalt that has been cooled to 140°C, and stir evenly to obtain epoxy asphalt.

[0062] Comparative Example 2: (1) This comparative example is an epoxy asphalt made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0063] (2) This comparative modifier system is made from the following raw materials: 3 parts corrosion inhibitor and 1 part dynamic repair agent.

[0064] (3) The corrosion inhibitor in this comparative example is zinc-doped vermiculite with an interlayer spacing of 1.4 nm and a zinc ion loading of 6.5 wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15 μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0065] (4) The preparation of an epoxy asphalt in this comparative example includes the following steps:

[0066] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0067] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0068] Step 3: The mixture is sheared at 140℃ using a high-speed shearing machine at 3000 rpm for 20 minutes, followed by vacuum degassing for 30 minutes to obtain epoxy asphalt.

[0069] Comparative Example 3: (1) This comparative example is an epoxy asphalt made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0070] (2) This comparative modifier system is made from the following raw materials: 5 parts of interface compatibilizer and 1 part of dynamic repair agent.

[0071] (3) The interface compatibilizer in this comparative example is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the dynamic repair agent is furan / maleimide microcapsules with a particle size of 15μm, a core-to-core furan / maleimide molar ratio of 1:1.3, and silica nanoparticles in the capsule wall account for 20% of the mass of polyurethane.

[0072] (4) The preparation of an epoxy asphalt in this comparative example includes the following steps:

[0073] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0074] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0075] Step 3: The mixture is sheared at 140℃ using a high-speed shearing machine at 3000 rpm for 20 minutes, followed by vacuum degassing for 30 minutes to obtain epoxy asphalt.

[0076] Comparative Example 4: (1) This comparative example is an epoxy asphalt made from the following raw materials: 40 parts of E-51 epoxy resin, 60 parts of Jiangsu Xinhai 70# road petroleum asphalt, and a modifier system accounting for 1% of the total mass.

[0077] (2) This comparative modifier system is made from the following raw materials: 5 parts of interface compatibilizer and 3 parts of corrosion inhibitor.

[0078] (3) The interface compatibilizer in this comparative example is a polyetheramine-dodecylphenol resin block copolymer with a molecular weight of 3500 and a polyetheramine segment ratio of 50wt%; the corrosion inhibitor is zinc-doped vermiculite with an interlayer spacing of 1.4nm and a zinc ion loading of 6.5wt%.

[0079] (4) The preparation of an epoxy asphalt in this comparative example includes the following steps:

[0080] Step 1: Heat 70# road petroleum asphalt to 155℃ until it reaches liquid flowability, then mix it with the modifier system and stir for 10 minutes until uniform.

[0081] Step 2: Heat the epoxy resin to 60°C, add it to the mixture that has been cooled to 140°C, and stir until homogeneous.

[0082] Step 3: The mixture is sheared at 140℃ using a high-speed shearing machine at 3000 rpm for 20 minutes, followed by vacuum degassing for 30 minutes to obtain epoxy asphalt.

[0083] Effect verification:

[0084] The epoxy asphalt obtained in the above examples and comparative examples was cured at 60°C for 4 days to obtain initial epoxy asphalt samples. The cured samples were then immersed in a 10% NaCl solution for 10 hours (water bath at 60°C), then removed and dried in a 60°C oven for 2 hours, simulating a wet-dry cycle. Tensile tests were performed on the samples after 5, 10, 15, and 20 wet-dry cycles using a universal testing machine, with three replicates for each test group.

[0085] The testing standards should refer to: Technical Specification for Design and Construction of Steel Bridge Deck Pavement for Highways (JTG / T3364-02—2019); the testing methods should refer to: Test Methods for Waterproof Coatings for Buildings (GB / T 16777-2008).

[0086] The results are as follows:

[0087] Table 1

[0088]

[0089] As shown in Table 1 above, Example 1 of the present invention exhibits significantly higher initial tensile strength and elongation at break than Comparative Example 1, which does not contain any modifier. Furthermore, after 20 cycles in a marine environment, its performance degradation is far less than that of Comparative Example 1. This result fully demonstrates that the modifier system proposed in this invention can significantly improve the initial mechanical properties of epoxy asphalt materials and maintain excellent stability in long-term complex marine environments. Although Examples 2-5 also used a modifier system, the performance degradation after 20 cycles was significantly greater because the molecular weight of the interface compatibilizer polyetheramine-alkylphenol resin block copolymer, the interlayer spacing of the corrosion-resistant reinforcing zinc-doped vermiculite nanosheets, and the particle size or core-to-molecular molar ratio of the dynamic repair agent furan / maleimide microcapsules were not controlled within the ranges defined in this invention. This indicates that the selection of key parameters for various modifiers in this invention is not arbitrary, but rather a comprehensive optimization result based on mechanisms such as material interface bonding, corrosion barrier effect, and self-healing efficiency.

[0090] Further comparison of Examples 2-4 reveals that the overall performance of the material declines when any type of modifier is missing from the system: the lack of an interfacial compatibilizer results in insufficient bonding between the asphalt and epoxy phases, leading to a significant decrease in tensile strength retention; the lack of a corrosion-resistant reinforcing agent exacerbates seawater ion erosion, causing a rapid decline in elongation at break; and the lack of a dynamic repair agent prevents effective healing of accumulated microcracks, significantly reducing durability. In contrast, the rational combination and synergistic effect of the three types of modifiers in Example 1 endows the material with not only excellent initial mechanical properties but also long-term corrosion resistance and self-healing properties. This fully demonstrates the necessity and irreplaceability of the modifier system of this invention, and its creative and scientifically grounded limitations on parameters such as molecular weight, interlayer spacing, particle size, and molar ratio ensure optimal comprehensive performance of epoxy asphalt under marine service conditions.

[0091] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An epoxy asphalt for steel bridge deck paving in a marine environment, characterized in that, It contains the following components: epoxy resin, asphalt, and modifier system; The modifier system includes an interface compatibilizer, a corrosion inhibitor, and a dynamic repair agent; The interface compatibilizer is a polyetheramine-alkylphenol resin block copolymer; the corrosion inhibitor is zinc-doped vermiculite nanosheets; and the dynamic repair agent is furan / maleimide microcapsules.

2. The epoxy asphalt for steel bridge deck paving in a marine environment according to claim 1, characterized in that, The epoxy resin is a bisphenol A type epoxy resin.

3. The epoxy asphalt for steel bridge deck paving in a marine environment according to claim 1, characterized in that, The asphalt is 70# road petroleum asphalt.

4. The epoxy asphalt for steel bridge deck paving in a marine environment according to claim 1, characterized in that, The modifier system, by weight fraction, accounts for 0.3 to 1.5 parts of the total mass of epoxy asphalt, including 3 to 8 parts of interface compatibilizer, 1 to 5 parts of anti-corrosion reinforcing agent, and 0.5 to 2 parts of dynamic repair agent.

5. The epoxy asphalt for steel bridge deck paving in a marine environment according to claim 4, characterized in that, The polyetheramine-alkylphenol resin block copolymer has a molecular weight of 2000-5000, the zinc-doped vermiculite nanosheets have an interlayer spacing of 1.2-1.8 nm, the furan / maleimide microcapsules have a particle size of 5-20 μm, and the capsule wall is a polyurethane-silica hybrid membrane.

6. The epoxy asphalt for steel bridge deck paving in a marine environment according to claim 5, characterized in that, The polyetheramine-alkylphenol resin block copolymer contains 40-60 wt% polyetheramine segments and C12-C18 straight-chain alkyl groups; the zinc-doped vermiculite nanosheets have a zinc ion loading of 5-8 wt%; the furan / maleimide microcapsules have a furan / maleimide molar ratio of 1:1.2-1.5 in the core and 10-30% silica nanoparticles in the capsule wall by mass of the polyurethane.

7. An asphalt mixture for steel bridge deck paving in a marine environment, characterized in that, The epoxy asphalt for steel bridge deck paving in marine environments, as described in any one of claims 1-5, also includes mineral aggregates and corrosion-resistant reinforcing mineral powder.

8. The asphalt mixture for steel bridge deck paving in a marine environment according to claim 7, characterized in that, The amount of epoxy asphalt used is 4.5% to 7.5% of the aggregate mass.

9. The asphalt mixture for steel bridge deck paving in a marine environment according to claim 7, characterized in that, The mineral material comprises 70-80 parts by weight of basalt grade material and 20-30 parts of limestone manufactured sand, with the basalt grade material having a particle size of 4.75 mm to 16 mm.

10. The asphalt mixture for steel bridge deck paving in a marine environment according to claim 1, characterized in that, The corrosion-resistant and reinforced mineral powder is 1-3% of the total mass of silane coupling agent modified Mg(OH)2 powder. The particle size of the silane coupling agent modified Mg(OH)2 powder is ≤0.075mm.

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