A steel bridge deck pavement system based on composite corrosion prevention and fiber reinforcement and a construction method thereof

Abstract

The present application relates to a steel bridge deck pavement structure and method, in particular to a steel bridge deck pavement system based on composite corrosion prevention and fiber reinforcement and a construction method thereof. The steel bridge deck pavement system is sequentially laid from bottom to top on the steel bridge deck slab, including a corrosion prevention bonding layer, a crack resistance lap joint layer, a high tackiness asphalt bonding layer, a lower pavement layer and an upper pavement layer. The steel bridge deck pavement system has excellent durability.

Description

Technical Field

[0001] This invention relates to steel bridge deck pavement structures and methods, and more particularly to a steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement and its construction method. Background Technology

[0002] With the development of modern society, bridges have become an indispensable part of connecting cities. my country ranks first in the world in terms of bridge construction scale. In the process of bridge design and construction, steel box girder bridges are widely used due to their advantages such as light weight, high torsional stiffness, and convenient construction. A steel bridge deck refers to a bridge deck structure made of welded or bolted steel plates. Steel bridge deck paving refers to the protective layer laid on the steel bridge deck to prevent direct wear of the bridge deck by wheels (or tracks), to distribute wheel loads, and to provide a smooth and non-slip driving surface for vehicles.

[0003] Steel bridge deck paving typically employs composite paving structures. Composite paving structures are created by combining structural layers of different material types and mechanical properties. This structure can compensate for the shortcomings of rigid pavements, such as poor driving comfort and high maintenance difficulty. It also provides greater overall pavement stiffness, stability, and driving comfort. However, existing composite paving structures are prone to fatigue failure, corrosion resistance, and poor high-temperature resistance. Therefore, there is an urgent need to develop a new composite paving system. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of this invention is to provide a steel bridge deck paving system based on composite anti-corrosion and fiber reinforcement, which has excellent durability.

[0005] The second objective of this invention is to provide a construction method for a steel bridge deck paving system based on composite anti-corrosion and fiber reinforcement, which is simple and easy to operate.

[0006] One of the objectives of this invention is achieved through the following technical solution: A steel bridge deck paving system based on composite anti-corrosion and fiber reinforcement is provided, in which an anti-corrosion bonding layer, a crack-resistant lap layer, a high-viscosity asphalt bonding layer, a lower paving layer, and a higher paving layer are laid sequentially from bottom to top on the steel bridge deck. The anti-corrosion adhesive layer comprises the following raw materials in parts by weight: 60-70 parts epoxy acrylate resin, 10-15 parts curing agent, and 20-25 parts additives. The crack-resistant lap layer is a modified basalt fiber grid; The high-viscosity asphalt bonding layer comprises the following raw materials in parts by weight: 25-30 parts of SBS / rubber composite modified asphalt, 70-80 parts of aggregate, and 5-10 parts of filler; The underlying layer of the paving includes: ultra-high viscosity basalt fiber SMA-20; The surface layer of the paving includes: ultra-high viscosity basalt fiber SMA-13.

[0007] Furthermore, the preparation process of the modified basalt fiber grid is as follows: (1) Add nano-silica to an aqueous ethanol solution, then add a silane coupling agent to react. After the reaction is complete, filter, wash and dry to obtain nano-silica modified with silane coupling agent. (2) Add the silane coupling agent-modified nano silica obtained in step (1) to N,N-dimethylformamide, and then add benzyl ester of β-phenylacrylate and azobisisobutyronitrile for heating reaction. After the reaction is completed, filter, wash and dry to obtain modified silica. (3) Add the modified silica from step (2) to ethanol, then add the pretreated basalt fiber, and impregnate for 40-60 minutes to obtain the modified basalt fiber. (4) The modified basalt fibers from step (3) are woven into a mesh structure to obtain a modified basalt fiber grid.

[0008] Furthermore, the modified basalt fiber grid has a basis weight ≥ 300 g / m³. 2 The mesh size is 15×15mm.

[0009] Furthermore, in step (1), the mass ratio of nano-silica to silane coupling agent is 1:(0.1-0.2); the silane coupling agent is vinyltriethoxysilane; the reaction temperature is 40-50℃, and the reaction time is 3-5h; the volume fraction of ethanol in the ethanol aqueous solution is 75%.

[0010] Furthermore, the particle size of the nano-silica in step (1) is 1-10 nm.

[0011] Furthermore, in step (2), the mass ratio of the silane coupling agent-modified nano-silica, benzyl β-phenylacrylate, and azobisisobutyronitrile is 1:(0.1-0.3):(0.005-0.01); the heating reaction temperature is 80-90℃ and the time is 2-3h.

[0012] Furthermore, in step (3), the ratio of modified silica, pretreated basalt fiber, and ethanol is 1g:(5-8)g:(1000-1200)mL.

[0013] Furthermore, the pretreated basalt fiber is obtained by the following process: adding basalt fiber to hydrochloric acid solution and soaking it at 35-45℃ for 0.5-1h.

[0014] Furthermore, the basalt fibers are 5-10 mm in length and 15-20 μm in diameter.

[0015] Furthermore, the curing agent is an amine-based curing agent; the additive is zinc powder.

[0016] Furthermore, the amine curing agent is triethylenetetramine or tetraethylenepentamine; the zinc powder has a particle size of 10-15 μm.

[0017] Furthermore, the aggregate is composed of 0-3mm basalt aggregate and 3-5mm basalt aggregate in a mass ratio of 1:(4-6); the filler is cement or mineral powder.

[0018] Furthermore, the thickness of the anti-corrosion bonding layer is 1.5-2mm, the thickness of the crack-resistant lap layer is 2-5cm, the thickness of the high-viscosity asphalt bonding layer is 0.4-0.8mm, the thickness of the lower paving layer is 5-8cm, and the thickness of the upper paving layer is 4-6cm.

[0019] Furthermore, the SBS / rubber composite modified asphalt has a viscosity ≥50,000 Pa·s at 60℃ and a spreading rate of 1.2-1.5 kg / m³. 2 Its softening point is ≥90℃.

[0020] Furthermore, the preparation method of the SBS / rubber composite modified asphalt is as follows: by weight, add 10 parts of SBS to 100 parts of asphalt matrix, stir at 185°C for 2 hours, and cool down to 160°C; according to the mass ratio of SBS to rubber of 1:2, continue to add rubber, and stir at 160°C for 2 hours, then add 2 parts of polyisoprene and 1 part of dioctyl phthalate, and grind at 160°C for 6 hours to obtain the final product.

[0021] Furthermore, the oil-stone ratio in the ultra-high viscosity basalt fiber SMA-20 is 6.2-6.8%, and the basalt fiber content is 0.3%.

[0022] Furthermore, the amount of nano-silica modified bitumen in the ultra-high viscosity basalt fiber SMA-13 ​​is 4%.

[0023] Furthermore, the preparation method of the nano-silica modified asphalt is as follows: (a) Weigh the following raw materials according to the following mass percentages: petroleum asphalt 36%, SBS 22%, styrene-isoprene-styrene block copolymer (SIS) 15%, nano silica 4%, talc 16%; (b) Add asphalt to a reactor (170°C), then add SBS and SIS to the reactor and stir and mix with asphalt at 170°C for 2 hours to obtain a primary mixture; (c) The primary mixture obtained in step (b) is added to a colloid mill along with talc and nano silica and ground to obtain a secondary mixture; (d) Repeat step (c) until nano-silica modified bitumen is obtained.

[0024] The second objective of this invention is achieved by the following technical solution: The construction method for the above-mentioned steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement includes the following steps: According to the paving system, the anti-corrosion bonding layer, crack-resistant lap layer, high-viscosity asphalt bonding layer, lower paving layer, and upper paving layer are sequentially prepared on the steel bridge deck.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The steel bridge deck pavement system obtained by this invention has excellent durability. Further analysis shows that the crack-resistant lap layer, the anti-corrosion bonding layer, and the high-viscosity asphalt bonding layer of this invention have excellent adhesion properties, thereby improving the durability of the pavement structure. Specifically, this invention first pre-treats basalt fibers, increasing their surface roughness and exposing more hydroxyl (-OH) groups. Then, nano-silica is modified with a silane coupling agent and grafted with benzyl β-phenylacrylate. Finally, this is deposited onto the fiber surface through impregnation. This process allows hydrogen bonding and dehydration condensation between the hydroxyl (-OH) groups on the basalt fiber surface and the unreacted coupling agent molecules on the modified silica surface, forming stable Si-O-Si chemical bonds. The modified basalt fiber surface is then grafted with an organic layer containing benzene rings, anchored by nano-SiO2 particles, significantly improving its wettability with resins and asphalt, forming a robust interpenetrating network structure. Finally, the modified basalt fibers are woven into a mesh structure, which can uniformly transfer and distribute loads, improving the durability of the pavement layer. Attached Figure Description

[0026] Figure 1 SEM image of the modified basalt fiber obtained in Example 1 of this invention; Figure 2 This is a schematic diagram of the steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement in Embodiment 1 of the present invention; Reference numerals: 1. Steel bridge deck; 2. Anti-corrosion bonding layer; 3. Crack-resistant lap layer; 4. High-viscosity asphalt bonding layer; 5. Lower pavement layer; 6. Upper pavement layer. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Specific conditions not specified in the embodiments shall be performed according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, all reagents or instruments used are conventional products obtained through commercial channels.

[0028] In this invention, the basalt fibers are 5-10 mm in length and 15-20 μm in diameter; the curing agent is triethylenetetramine; the zinc powder has a particle size of 10-15 μm; the nano-silica has a particle size of 1-10 nm; the filler is cement; and the modified basalt fiber grid has a basis weight ≥ 300 g / m². 2 The mesh size is 15×15mm; the asphalt-aggregate ratio in ultra-high viscosity basalt fiber SMA-20 is 6.2-6.8%, and the basalt fiber content is 0.3%; the nano-silica modified asphalt content in ultra-high viscosity basalt fiber SMA-13 ​​is 4%; the preparation method of SBS / rubber composite modified asphalt is as follows: by weight, add 10 parts of SBS to 100 parts of asphalt matrix, stir at 185℃ for 2 hours, and cool to 160℃; according to the mass ratio of SBS to rubber of 1:2, continue to add rubber, and stir at 160℃ for 2 hours, then add 2 parts of polyisoprene and 1 part of dioctyl phthalate, and grind at 160℃ for 6 hours to obtain SBS / rubber composite modified asphalt with a viscosity ≥50,000 Pa·s at 60℃ and a spreading rate of 1.2-1.5 kg / m³. 2 Softening point ≥90℃; The preparation method of nano-silica modified asphalt is as follows: (a) Weigh the following raw materials according to the following mass percentages: petroleum asphalt 36%, SBS 22%, styrene-isoprene-styrene block copolymer (SIS) 15%, nano silica 4%, talc 16%; (b) Add asphalt to a reactor (170°C), then add SBS and SIS to the reactor and stir and mix with asphalt at 170°C for 2 hours to obtain a primary mixture; (c) The primary mixture obtained in step (b) is added to a colloid mill along with talc and nano silica and ground to obtain a secondary mixture; (d) Repeat step (c) until nano-silica modified bitumen is obtained.

[0029] (a) Preparation example Preparation Example 1 Preparation Example 1 provides a modified basalt fiber grid, and the detailed preparation process is as follows: (1) With a mass ratio of nano silica to vinyltriethoxysilane of 1:0.15, nano silica was added to an aqueous ethanol solution with a volume fraction of 75%, and then vinyltriethoxysilane was added. The reaction was carried out at 45°C for 4 hours. After the reaction was completed, the nano silica was filtered, washed and dried to obtain nano silica modified with silane coupling agent. (2) The nano-silica modified with silane coupling agent, benzyl β-phenyl acrylate, and azobisisobutyronitrile are in a mass ratio of 1:0.2:0.008. The nano-silica modified with silane coupling agent obtained in step (1) is added to N,N-dimethylformamide, and then benzyl β-phenyl acrylate and azobisisobutyronitrile are added. The reaction is carried out at 85°C for 2.5 h. After the reaction is completed, the mixture is filtered, washed, and dried to obtain modified silica. (3) Basalt fibers were added to a 0.1 mol / L hydrochloric acid solution and soaked at 40°C for 0.7 h to obtain pretreated basalt fibers. Then, the modified silica from step (2) was added to ethanol at a ratio of 1 g: 7 g: 1100 mL, followed by the addition of the pretreated basalt fibers. The mixture was then soaked at room temperature for 50 min to obtain modified basalt fibers. The SEM image of the modified basalt fibers can be found in [reference needed]. Figure 1 ; (4) The modified basalt fibers from step (3) are woven into a mesh structure to obtain a modified basalt fiber grid.

[0030] Preparation Example 2 Preparation Example 2 provides a modified basalt fiber grid, and the detailed preparation process is as follows: (1) With a mass ratio of nano silica to vinyltriethoxysilane of 1:0.1, nano silica was added to an aqueous ethanol solution with a volume fraction of 75%, and then vinyltriethoxysilane was added. The reaction was carried out at 40°C for 5 hours. After the reaction was completed, the nano silica was filtered, washed and dried to obtain nano silica modified with silane coupling agent. (2) The nano-silica modified with silane coupling agent, benzyl β-phenyl acrylate, and azobisisobutyronitrile are in a mass ratio of 1:0.1:0.005. The nano-silica modified with silane coupling agent obtained in step (1) is added to N,N-dimethylformamide, and then benzyl β-phenyl acrylate and azobisisobutyronitrile are added. The reaction is carried out at 80°C for 3 hours. After the reaction is completed, the mixture is filtered, washed, and dried to obtain modified silica. (3) Add basalt fiber to 0.1 mol / L hydrochloric acid solution and soak at 35°C for 1 h to obtain pretreated basalt fiber; then add the modified silica from step (2) to ethanol at a ratio of 1 g: 5 g: 1000 mL, add the pretreated basalt fiber, and soak at room temperature for 40 min to obtain modified basalt fiber; (4) The modified basalt fibers from step (3) are woven into a mesh structure to obtain a modified basalt fiber grid.

[0031] Preparation Example 3 Preparation Example 3 provides a modified basalt fiber grid, and the detailed preparation process is as follows: (1) With a mass ratio of nano silica to vinyltriethoxysilane of 1:0.2, nano silica was added to an aqueous ethanol solution with a volume fraction of 75%, and then vinyltriethoxysilane was added. The reaction was carried out at 50°C for 3 hours. After the reaction was completed, the nano silica was filtered, washed and dried to obtain nano silica modified with silane coupling agent. (2) The nano-silica modified with silane coupling agent, benzyl β-phenyl acrylate, and azobisisobutyronitrile are in a mass ratio of 1:0.3:0.01. The nano-silica modified with silane coupling agent obtained in step (1) is added to N,N-dimethylformamide, and then benzyl β-phenyl acrylate and azobisisobutyronitrile are added. The reaction is carried out at 90°C for 2 hours. After the reaction is completed, the mixture is filtered, washed, and dried to obtain modified silica. (3) Add basalt fiber to 0.1 mol / L hydrochloric acid solution and soak at 45℃ for 0.5 h to obtain pretreated basalt fiber; then add the modified silica from step (2) to ethanol at a ratio of 1 g: 8 g: 1200 mL, add the pretreated basalt fiber, and soak at room temperature for 60 min to obtain modified basalt fiber; (4) The modified basalt fibers from step (3) are woven into a mesh structure to obtain a modified basalt fiber grid.

[0032] Preparation Example 4 The difference between Preparation Example 4 and Preparation Example 1 is that steps (1)-(3) are omitted, and basalt fibers are directly woven into a mesh structure.

[0033] Preparation Example 5 The difference between Preparation Example 5 and Preparation Example 1 is that basalt fiber modified with silane coupling agent is used instead of modified basalt fiber and woven into a mesh structure; the preparation process of the silane coupling agent modified basalt fiber is as follows: basalt fiber is added to an ethanol aqueous solution with a volume fraction of 75%, then vinyltriethoxysilane is added, and the reaction is carried out at 40°C for 5 hours. After the reaction is completed, the fiber is filtered, washed, and dried.

[0034] (II) Implementation Examples Example 1 This embodiment provides a steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement. See the schematic diagram below. Figure 2The system is specifically as follows: from bottom to top, the following layers are laid on the steel bridge deck 1: anti-corrosion bonding layer 2, crack-resistant lap layer 3, high-viscosity asphalt bonding layer 4, lower paving layer 5, and upper paving layer 6.

[0035] The anti-corrosion bonding layer 2 comprises the following raw materials in parts by weight: 65 parts epoxy acrylate resin, 12 parts triethylenetetramine, and 23 parts zinc powder. The anti-corrosion bonding layer 2 is applied by spraying. The crack-resistant lap layer 3 is laid with the modified basalt fiber grid of Preparation Example 1. The high-viscosity asphalt bonding layer 4 comprises the following raw materials in parts by weight: 26 parts SBS / rubber composite modified asphalt, 74 parts aggregate, and 8 parts cement. The aggregate is composed of 0-3mm basalt aggregate and 3-5mm basalt aggregate in a mass ratio of 1:5. The lower paving layer 5 is laid with ultra-high viscosity basalt fiber SMA-20. The upper paving layer 6 is laid with ultra-high viscosity basalt fiber SMA-13.

[0036] This embodiment also provides a construction method for the above-mentioned steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement, as follows: According to the above paving system, a 1.5mm thick anti-corrosion bonding layer 2, a 4cm thick crack-resistant lap layer 3, a 0.6mm thick high-viscosity asphalt bonding layer 4, a 7cm thick paving lower layer 5, and a 5cm thick paving upper layer 6 are sequentially prepared on the steel bridge deck 1.

[0037] Example 2 This embodiment provides a steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement. Specifically, the system is as follows: On the steel bridge deck 1, from bottom to top, lay the following layers in sequence: anti-corrosion bonding layer 2, crack-resistant lap layer 3, high-viscosity asphalt bonding layer 4, lower paving layer 5, and upper paving layer 6.

[0038] The anti-corrosion bonding layer 2 comprises the following raw materials in parts by weight: 60 parts epoxy acrylate resin, 10 parts triethylenetetramine, and 20 parts zinc powder. The anti-corrosion bonding layer 2 is applied by spraying. The crack-resistant lap layer 3 is laid with the modified basalt fiber grid of Preparation Example 2. The high-viscosity asphalt bonding layer 4 comprises the following raw materials in parts by weight: 25 parts SBS / rubber composite modified asphalt, 70 parts aggregate, and 5 parts cement. The aggregate is composed of 0-3mm basalt aggregate and 3-5mm basalt aggregate in a mass ratio of 1:4. The lower paving layer 5 is laid with ultra-high viscosity basalt fiber SMA-20. The upper paving layer 6 is laid with ultra-high viscosity basalt fiber SMA-13.

[0039] This embodiment also provides a construction method for the above-mentioned steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement, as follows: According to the above paving system, a 1.8mm thick anti-corrosion bonding layer 2, a 2cm thick crack-resistant lap layer 3, a 0.4mm thick high-viscosity asphalt bonding layer 4, a 5cm thick paving lower layer 5, and a 4cm thick paving upper layer 6 are sequentially prepared on the steel bridge deck 1.

[0040] Example 3 This embodiment provides a steel bridge deck paving system based on composite anti-corrosion and fiber reinforcement. Specifically, the system consists of laying an anti-corrosion bonding layer 2, a crack-resistant lap layer 3, a high-viscosity asphalt bonding layer 4, a lower paving layer 5, and a higher paving layer 6 on the steel bridge deck 1 from bottom to top.

[0041] The anti-corrosion bonding layer 2 comprises the following raw materials in parts by weight: 70 parts epoxy acrylate resin, 15 parts triethylenetetramine, and 25 parts zinc powder. The anti-corrosion bonding layer 2 is applied by spraying. The crack-resistant lap layer 3 is laid with the modified basalt fiber grid of Preparation Example 3. The high-viscosity asphalt bonding layer 4 comprises the following raw materials in parts by weight: 30 parts SBS / rubber composite modified asphalt, 80 parts aggregate, and 10 parts cement. The aggregate is composed of 0-3mm basalt aggregate and 3-5mm basalt aggregate in a mass ratio of 1:6. The lower paving layer 5 is laid with ultra-high viscosity basalt fiber SMA-20. The upper paving layer 6 is laid with ultra-high viscosity basalt fiber SMA-13.

[0042] This embodiment also provides a construction method for the above-mentioned steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement, as follows: According to the above paving system, the following layers are prepared sequentially on the steel bridge deck 1: a 2mm thick anti-corrosion bonding layer 2, a 5cm thick crack-resistant lap layer 3, a 0.8mm thick high-viscosity asphalt bonding layer 4, an 8cm thick lower paving layer 5, and a 6cm thick upper paving layer 6.

[0043] (III) Comparative Example Comparative Example 1 The difference between this comparative example and Example 1 is that the crack-resistant lap layer is the grid prepared in Example 4.

[0044] Comparative Example 2 The difference between this comparative example and Example 1 is that the crack-resistant lap layer is the grid prepared in Example 5.

[0045] (iv) Experimental Examples Experimental Example 1 The bond strength between the grids obtained in Examples 1-5 and the anti-corrosion bonding layer and the high-viscosity asphalt bonding layer of Example 1 was tested, and the results are shown in Table 1.

[0046] Table 1 As shown in Table 1, compared with Preparation Examples 4-5, the grids obtained in Preparation Examples 1-3 have excellent adhesion properties to the anti-corrosion bonding layer and the high-viscosity asphalt bonding layer.

[0047] Experiment Example 2 The performance of the pavement structures in Examples 1-3 and Comparative Examples 1-2 was tested in accordance with JTG / T3364-02-2019 "Technical Specification for Design and Construction of Steel Bridge Deck". The results are shown in Table 2.

[0048] Table 2 As shown in Table 2, the pavement structure of the present invention exhibits excellent durability. Combined with the analysis in Table 1, it can be seen that the modified basalt fiber has excellent adhesion to the anti-corrosion bonding layer and the high-viscosity asphalt bonding layer, thereby improving the durability of the pavement structure. Further analysis reveals that this invention first pre-treats the basalt fiber, increasing its surface roughness and exposing more hydroxyl (-OH) groups. Then, nano-silica is modified with a silane coupling agent and grafted with benzyl β-phenylacrylate. Finally, it is deposited onto the fiber surface through impregnation. This process allows hydrogen bonding and dehydration condensation between the hydroxyl (-OH) groups on the basalt fiber surface and the unreacted coupling agent molecules on the modified silica surface, forming stable Si-O-Si chemical bonds. The modified basalt fiber surface is then grafted with an organic layer containing benzene rings, anchored by nano-SiO2 particles, significantly improving its wettability with resins and asphalt, forming a robust interpenetrating network structure. Finally, the modified basalt fiber is woven into a mesh structure, which can uniformly transfer and distribute loads, improving the durability of the pavement layer.

[0049] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement, characterized in that, The anti-corrosion bonding layer, crack-resistant lap layer, high-viscosity asphalt bonding layer, lower paving layer, and upper paving layer are laid sequentially from bottom to top on the steel bridge deck. The anti-corrosion adhesive layer comprises the following raw materials in parts by weight: 60-70 parts epoxy acrylate resin, 10-15 parts curing agent, and 20-25 parts additives. The crack-resistant lap layer is a modified basalt fiber grid; The high-viscosity asphalt bonding layer comprises the following raw materials in parts by weight: 25-30 parts of SBS / rubber composite modified asphalt, 70-80 parts of aggregate, and 5-10 parts of filler; The underlying layer of the paving includes: ultra-high viscosity basalt fiber SMA-20; The surface layer of the paving includes: ultra-high viscosity basalt fiber SMA-13.

2. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 1, characterized in that, The preparation process of the modified basalt fiber grid is as follows: (1) Add nano-silica to an aqueous ethanol solution, then add a silane coupling agent to react. After the reaction is complete, filter, wash and dry to obtain nano-silica modified with silane coupling agent. (2) Add the silane coupling agent-modified nano silica obtained in step (1) to N,N-dimethylformamide, and then add benzyl ester of β-phenylacrylate and azobisisobutyronitrile for heating reaction. After the reaction is completed, filter, wash and dry to obtain modified silica. (3) Add the modified silica from step (2) to ethanol, then add the pretreated basalt fiber, and impregnate for 40-60 minutes to obtain the modified basalt fiber. (4) The modified basalt fibers from step (3) are woven into a mesh structure to obtain a modified basalt fiber grid.

3. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 2, characterized in that, In step (1), the mass ratio of nano-silica to silane coupling agent is 1:(0.1-0.2); the silane coupling agent is vinyltriethoxysilane; the reaction temperature is 40-50℃ and the reaction time is 3-5h; the volume fraction of ethanol in the ethanol aqueous solution is 75%.

4. The steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement according to claim 2, characterized in that, In step (2), the mass ratio of the silane coupling agent-modified nano-silica, benzyl β-phenyl acrylate, and azobisisobutyronitrile is 1:(0.1-0.3):(0.005-0.01); the heating reaction temperature is 80-90℃ and the time is 2-3h.

5. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 2, characterized in that, The ratio of modified silica, pretreated basalt fiber and ethanol used in step (3) is 1g:(5-8)g:(1000-1200)mL.

6. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 5, characterized in that, The pretreated basalt fiber is obtained by the following process: adding basalt fiber to hydrochloric acid solution and soaking it at 35-45℃ for 0.5-1h.

7. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 1, characterized in that, The curing agent is an amine-based curing agent; the additive is zinc powder.

8. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 1, characterized in that, The aggregate is composed of 0-3mm basalt aggregate and 3-5mm basalt aggregate in a mass ratio of 1:(4-6); the filler is cement or mineral powder.

9. The steel bridge deck pavement system based on composite corrosion protection and fiber reinforcement according to claim 1, characterized in that, The thickness of the anti-corrosion bonding layer is 1.5-2mm, the thickness of the crack-resistant lap layer is 2-5cm, the thickness of the high-viscosity asphalt bonding layer is 0.4-0.8mm, the thickness of the lower paving layer is 5-8cm, and the thickness of the upper paving layer is 4-6cm.

10. A construction method for a steel bridge deck pavement system based on composite anti-corrosion and fiber reinforcement as described in any one of claims 1-9, characterized in that, Includes the following steps: According to the paving system, the anti-corrosion bonding layer, crack-resistant lap layer, high-viscosity asphalt bonding layer, lower paving layer, and upper paving layer are sequentially prepared on the steel bridge deck.

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