CN110714405A - Paving method of novel bicycle lane steel bridge deck paving layer structure - Google Patents
Paving method of novel bicycle lane steel bridge deck paving layer structure Download PDFInfo
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- CN110714405A CN110714405A CN201911015034.7A CN201911015034A CN110714405A CN 110714405 A CN110714405 A CN 110714405A CN 201911015034 A CN201911015034 A CN 201911015034A CN 110714405 A CN110714405 A CN 110714405A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
A paving method of a novel bicycle lane steel bridge deck paving layer structure is characterized in that a steel bridge deck, an anti-corrosion bonding layer, an ultra-high performance concrete (UHPC) plate and a sealing layer are sequentially paved on the bicycle lane paving structure from bottom to top, the anti-corrosion bonding layer is prepared from epoxy zinc-rich primer, the ultra-high performance concrete (UHPC) plate is composed of cement, silica fume, steel fiber, fine aggregate and a high-efficiency water reducing agent, and the sealing layer is prepared from polyurethane modified epoxy resin. The steel bridge deck plate is welded with studs. The application provides a novel method of mating formation of bicycle lane steel bridge floor pavement layer structure, possess super high intensity, good anticorrosive nature, security and durability, reduced the construction degree of difficulty simultaneously, reduced construction cost, produced certain economic benefits and social.
Description
Technical Field
The invention relates to the technical field of road engineering, in particular to a paving method of a novel pavement layer structure of a bicycle lane steel bridge deck.
Background
Traffic is an important foundation for the development of the country, and the world places the development of traffic and transportation business in an important position, and the traffic is also in China. As a component of urban traffic, the bicycle has the characteristics of convenience, flexibility, strong adaptability and the like. In addition, the bicycle is an environment-friendly vehicle, no noise is generated in the using process, gasoline is not needed to be used as a power source, no harmful gas is discharged, air pollution is reduced, energy is saved, and the bicycle is beneficial to the health of people when people ride the bicycle for a long time. Therefore, the bicycle is an important component of ecological civilization construction and is a green and healthy choice. However, with the increasing number of motor vehicles, traffic jam often occurs in big cities, and the phenomenon of mixing of bicycles and motor vehicles at intersections is serious, so that the bicycles and the motor vehicles are influenced and collided with each other, and the traveling is difficult and the efficiency is low. The elevated bicycle lane is suitable for transportation in order to relieve road congestion and guarantee the traveling safety of bicycle citizens.
The bridge deck of the elevated bicycle lane is mainly composed of bridge deck pavement and bridge deck slabs, the bridge deck pavement directly bears the load of bicycle vehicles, and the bridge deck pavement has a great effect on preventing the wear of the bridge deck slabs, avoiding the erosion of rainwater and providing friction force for riding. At present, most of steel bridge deck pavement at home and abroad adopts asphalt mixture pavement. However, the steel plate needs to consider waterproof, antirust and other protection measures, the traditional asphalt mixture pavement layer has a large number of pores and is poor in waterproof performance, oxygen in the air and accumulated water on the road surface can penetrate through the pores to reach the bridge deck and directly contact with steel, and finally the pavement layer is damaged by water, the road surface is corroded and the like, so that the durability and the safety of the steel bridge deck are seriously influenced. The conventional solution is to improve the material performance of the paving mixture and optimize the thickness of the paving layer, but the measures are the temporary solution and the permanent solution.
The asphalt concrete is a flexible paving material, has extremely low elastic modulus compared with steel, and basically does not combine with a steel bridge surface to bear force. In recent years, Ultra High Performance Concrete (UHPC) has been studied and used more fully. The UHPC has the characteristics of ultrahigh compressive strength and ultrahigh breaking strength of not less than 120MPa, good volume stability, high toughness, better impermeability and the like. The rigid pavement is used for participating in stress of the bridge deck slab, the rigidity of the bridge deck slab is improved, the safety of the structure is improved, the durability of the bridge deck slab reaches more than 50 years, and the service life of the structure can be greatly prolonged. Meanwhile, due to the fact that the UHPC is high in strength, the using amount of other materials can be reduced, the self weight of the structure is reduced, the construction difficulty is reduced, manpower and material resources are saved, and the construction cost is reduced.
The ultra-high performance concrete has excellent mechanical property and durability as a high performance concrete, so that the whole life cycle cost of the structure is low, and the development concepts of low carbon, environmental protection, beauty, economy, rapid construction and the like are met. The requirements of the national important strategic layout of the greening, industrialization and standardization in the traffic industry are met.
The epoxy zinc-rich primer is a high-performance paint, the paint film is tough, wear-resistant, good in adhesive force, rust-resistant and strong in corrosion resistance, and the bottom steel plate can be protected to the maximum extent by using the epoxy zinc-rich primer as a material of the corrosion-resistant bonding layer, so that the epoxy zinc-rich primer can adapt to various strong corrosion environments. In addition, compared with other primers, the epoxy zinc-rich primer has the advantages of good heat resistance, excellent static conductivity, no influence on welding construction and the like.
Epoxy resins have excellent physical properties and adhesive properties, but their applications are further limited because cured epoxy resins have disadvantages of high brittleness, low toughness, poor weather resistance, and the like. Experimental research and engineering practice show that the toughness of the epoxy resin can be improved and the wear resistance, hardness and adhesive force of the epoxy resin can be improved by modifying the epoxy resin with polyurethane. After the resin is completely cured, the resin does not react with acid, alkali and salt, and can effectively resist corrosion of acid substances and oil stains on bridge surfaces.
Based on the advantages, the invention provides a paving method of a novel bicycle lane steel bridge deck paving layer structure. The pavement structure has the characteristics of high strength, good durability, high safety, convenience in construction, good impermeability and corrosion resistance and the like, reduces the damage of a pavement layer, and prolongs the service life of a bicycle lane.
Disclosure of Invention
(1) Technical problem
The invention aims to provide a paving method of a novel bicycle lane steel bridge deck pavement layer structure, which is a bicycle lane steel bridge deck pavement structure with high safety, better impermeability, corrosion resistance and durability and can effectively solve the problems of water damage of a pavement layer, bridge deck corrosion and the like. Meanwhile, the construction difficulty can be reduced, manpower and material resources are saved, the construction cost is reduced, the safety and the durability of the structure are improved, and the service cycle of the bicycle lane is prolonged.
(2) Technical scheme
In order to achieve the purpose, the invention adopts the technical scheme that:
the paving method of the novel bicycle lane steel bridge deck pavement layer structure comprises the steps of stud welding, sand blasting and rust removing treatment of a steel bridge deck, laying of an anti-corrosion bonding layer, pouring of an Ultra High Performance Concrete (UHPC) plate and laying of a sealing layer, and is characterized by comprising the following steps of:
step A, stud welding:
the main special equipment for stud construction is a fusion welding stud machine, a medium-sized welding machine is required to be arranged in a matched mode for stud repair welding during the fusion welding stud construction, and a B2 type ceramic ring is selected to protect electric arcs. Before welding, the surface of the stud is smooth and clean, and is not required to be rusted, oxidized thin layer, grease and burr, and the surface of the rod part is not allowed to have cracks influencing use. The steel bridge deck is not allowed to have paint, rust, water and oil stains. The stud is placed in a clamping device of a welding gun, a protective porcelain ring with a corresponding diameter is placed on the steel bridge panel, the stud is inserted into the porcelain ring and is in contact with the steel bridge panel, and the welding gun and the periphery of a workpiece form an angle of 90 degrees. And (5) switching on a welding gun power supply to locally melt the end part of the stud and the surface of the steel bridge deck. The power is turned off and the molten metal solidifies, leaving the torch immobile. Cooling the welding line, forming uniform annular welding line surplus height on the surface of the end part of the stud, then breaking and removing the ceramic ring, and finishing welding;
b, steel bridge deck plate sand blasting rust removal treatment:
and (3) carrying out sand blasting and rust removing treatment on the steel bridge deck by adopting an automatic dust-free sand blasting machine, wherein the used grinding material is stainless steel sand with the angular or round bead-shaped granularity of 0.7-1.0 mm. The cleanliness of the finally derusted steel plate reaches Sa2.5 grade, and the roughness reaches 70-100 mu m. After sand blasting and rust removal, the epoxy zinc-rich coating is guaranteed to be coated within 2 hours, the surface treatment can be carried out on the bridge deck blocks, and the next step can be carried out after the experience is collected;
step C, laying an anticorrosive bonding layer:
in the construction process and before the coating is dried and cured, the environmental temperature is preferably kept at 5-38 ℃, the relative humidity is not more than 90%, and the air is circulated. When the wind speed is more than 5m/s or the rain and the surface of the component are exposed, the operation is not suitable. The temperature of the substrate is higher than the dew point by more than 3 ℃ during construction. Before use, the component A is stirred, so that the upper and lower layers of paint are uniform and no visible sediment or agglomeration exists. Mixing the component A and the component B according to the ratio of 10: 1, accurately weighing, and coating after standing for a period of time. Brushing a layer of epoxy zinc-rich primer on the surface of the steel bridge deck by using a roller, and drying for about 12 hours, wherein the thickness of a paint film is 30-50 microns; after the primer coated on the first layer is dried, the next layer is coated by the same method until the thickness of the anticorrosion bonding layer reaches 1 mm. When in brush coating, the brush is required to be brushed in place, fully brushed and uniformly brushed. The next step can be carried out after the experience gathering grid;
step D, pouring of the ultra-high performance concrete (UHPC) plate:
the anticorrosive adhesive layer is cleaned of dust and welding slag by a high-pressure air pipe before concrete pouring. The casting of UHPC should be performed and completed continuously to avoid skinning or cold seams on the exposed surfaces. Spreading the anti-corrosion bonding layer on the concrete in a tank car transportation mode, roughly leveling by using a trowel, continuously repeating for several times along the direction of a lane until leveling by using aluminum alloy as a scraping rule, so that the leveled surface cannot be exposed with steel fibers and floating slurry is left to ensure the pavement flatness. After pouring, the concrete is immediately covered with wet cloth and sprayed with a curing agent to prevent surface moisture loss. The next step can be carried out after the experience gathering grid;
e, laying a sealing layer:
after the ultra-high performance concrete (UHPC) plate is maintained, selecting the conditions that the air temperature is more than 20 ℃, the air relative humidity is less than 75 percent and the air speed is low, adopting polyurethane modified epoxy resin, wherein the volume ratio of the epoxy resin A to the epoxy resin curing agent B is 2: 1, and using spraying equipment with the spraying amount of 0.26-0.32L/m2And the thickness of the sealing layer after the polyurethane modified epoxy resin is cured is 1mm +/-0.5 mm, and the construction of the sealing layer is completed.
(3) Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts ultra-high performance concrete (UHPC) as a rigid paving material, and the compressive strength of the material is more than 120MPa and is 4-5 times higher than that of common concrete. The steel fibers dispersed in the UHPC can greatly slow down the expansion of micro cracks in the material, so that the material has ultrahigh toughness and ductility. The UHPC has a compact microstructure inside, has high capability of resisting rainwater infiltration, prolongs the service life of the bridge deck, improves the impermeability and durability of the material, and enhances the safety of the structure.
2. Due to the high performance of the UHPC, the layout of reinforcing steel bars is cancelled in the construction process, the construction flow is greatly simplified, the quality is easy to control, the manpower and material resources are saved, the construction cost is reduced, and certain economic benefit is generated.
And 3, due to the adoption of the UHPC, the defect of poor waterproof performance of a traditional asphalt mixture pavement structure is effectively overcome, the maintenance scale of a bicycle lane in operation and the traffic blockage in maintenance are greatly reduced, and potential social benefits are generated.
4. The epoxy zinc-rich primer is selected as a paving material of the anti-corrosion bonding layer, so that the steel plate is greatly protected from being corroded, and the anti-corrosion property and durability of the structure are improved.
5. The polyurethane modified epoxy resin is selected as the paving material of the sealing layer, so that the cohesiveness between the structural layers is further enhanced, the corrosion resistance and seepage resistance of the structure are improved, and the service life of the paving structure is prolonged.
Description of the drawings:
the drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention:
FIG. 2 is a schematic cross-sectional view of the structure of an embodiment of the present invention;
fig. 3 is a schematic illustration of a peg configuration.
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following specific embodiments.
Reference numerals in the drawings of the specification include: the concrete slab comprises a steel bridge deck 1, an anticorrosive bonding layer 2, an Ultra High Performance Concrete (UHPC) slab 3, a sealing layer 4, studs 5, fine aggregates 6, steel fibers 7 and stud heads 51.
The paving method of the novel bicycle lane steel bridge deck paving layer structure comprises the following steps:
step A, welding of the stud 5:
the main special equipment for stud construction is a fusion welding stud machine, a medium-sized welding machine is required to be arranged in a matched mode for stud repair welding during the fusion welding stud construction, and a B2 type ceramic ring is selected to protect electric arcs. Before welding, the surface of the stud 5 is smooth and clean, and is not required to be rusted, oxidized thin layer, grease and burr, and the surface of the rod part is not allowed to have cracks influencing use. The steel decking 1 is not susceptible to paint, rust, water and oil. The stud 5 is placed in a clamping device of a welding gun, a protective porcelain ring with a corresponding diameter is placed on the steel bridge deck 1, the stud 5 is inserted into the porcelain ring and is in contact with the steel bridge deck 1, and the welding gun and the periphery of a workpiece form an angle of 90 degrees. And (5) switching on a welding gun power supply to locally melt the end part of the stud 5 and the surface of the steel bridge deck 1. The power is turned off and the molten metal solidifies, leaving the torch immobile. Cooling the welding line, forming uniform annular welding line surplus height on the surface of the end part of the stud 5, then breaking and removing the ceramic ring, and finishing welding;
b, sand blasting and rust removing treatment of the steel bridge deck plate 1:
and (3) carrying out sand blasting and rust removing treatment on the steel bridge deck plate 1 by adopting an automatic dust-free sand blasting machine, wherein the used grinding material is stainless steel sand with the angular or round bead-shaped granularity of 0.7-1.0 mm. The cleanliness of the finally derusted steel plate reaches Sa2.5 grade, and the roughness reaches 70-100 mu m. After sand blasting and rust removal, the epoxy zinc-rich coating is guaranteed to be coated within 2 hours, the surface treatment can be carried out on the bridge deck blocks, and after the self-inspection and supervision inspection are qualified, the next step can be carried out after the experience collection;
step C, laying an anticorrosive bonding layer 2:
in the construction process and before the coating is dried and cured, the environmental temperature is preferably kept at 5-38 ℃, the relative humidity is not more than 90%, and the air is circulated. When the wind speed is more than 5m/s or the rain and the surface of the component are exposed, the operation is not suitable. The temperature of the substrate is higher than the dew point by more than 3 ℃ during construction. Before use, the component A is stirred, so that the upper and lower layers of paint are uniform and no visible sediment or agglomeration exists. Mixing the component A and the component B according to the ratio of 10: 1, accurately weighing, and coating after standing for a period of time. Brushing a layer of epoxy zinc-rich primer on the surface of the steel bridge deck 1 by using a roller, and drying for about 12 hours, wherein the thickness of a paint film is 30-50 microns; after the primer coated on the first layer is dried, the next layer is coated by the same method until the thickness of the anti-corrosion bonding layer 2 reaches 1 mm. When in brush coating, the brush is required to be brushed in place, fully brushed and uniformly brushed. The next step can be carried out after the experience gathering grid;
step d, pouring of the Ultra High Performance Concrete (UHPC) panel 3:
and the anticorrosive bonding layer 2 is cleaned of dust and welding slag by a high-pressure air pipe before concrete pouring. The casting of UHPC should be performed and completed continuously to avoid skinning or cold seams on the exposed surfaces. Spreading the concrete on the anti-corrosion bonding layer 2 by adopting a tank car transportation mode, after rough leveling by using a trowel, continuously repeating for several times along the direction of a lane by using aluminum alloy as a scraping ruler until the concrete is scraped, so that the leveled surface cannot be exposed with steel fibers and floating slurry is left, and the pavement flatness is ensured. After pouring, the concrete is immediately covered with wet cloth and sprayed with a curing agent to prevent surface moisture loss. The next step can be carried out after the experience gathering grid;
step E, laying of a sealing layer 4:
after the Ultra High Performance Concrete (UHPC) plate 3 is maintained, selecting the conditions that the air temperature is more than 20 ℃, the air relative humidity is less than 75 percent and the air speed is low, adopting polyurethane modified epoxy resin, wherein the volume ratio of the epoxy resin A to the epoxy resin curing agent B is 2: 1, using spraying equipment, and the spraying amount is 0.26-0.32L/m2And the thickness of the sealing layer 4 after the polyurethane modified epoxy resin is cured is 1mm +/-0.5 mm, and the construction of the sealing layer is completed.
Various other changes and modifications to the above embodiments and concepts will become apparent to those skilled in the art, and all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims.
Claims (12)
1. The paving method of the novel bicycle lane steel bridge deck pavement layer structure comprises the steps of welding of studs (5), sand blasting and rust removing treatment of a steel bridge deck (1), paving of an anti-corrosion bonding layer (2), pouring of an ultra-high performance concrete (UHPC) plate (3) and paving of a sealing layer (4), and is characterized by comprising the following steps of:
step A, welding of the stud (5):
the main special equipment for stud construction is a fusion welding stud machine, a medium-sized welding machine is required to be arranged in a matched mode for stud repair welding during the fusion welding stud construction, and a B2 type ceramic ring is selected to protect electric arcs. The surface of the stud (5) before welding is ensured to be smooth and clean without rusting, thin oxide layers, grease and burrs, and the surface of the rod part of the stud is not allowed to have cracks influencing use. The steel bridge deck (1) is not allowed to have paint, rust, water and oil stains. The stud (5) is placed in a clamping device of a welding gun, a protective porcelain ring with a corresponding diameter is placed on the steel bridge panel (1), the stud (5) is inserted into the porcelain ring and is in contact with the steel bridge panel (1), and the welding gun and the periphery of a workpiece form an angle of 90 degrees. And (3) switching on a welding gun power supply to locally melt the end part of the stud (5) and the surface of the steel bridge deck (1). The power is turned off and the molten metal solidifies, leaving the torch immobile. Cooling the welding line, forming uniform annular welding line surplus height on the surface of the end part of the stud (5), then breaking and removing the ceramic ring, and finishing welding;
b, sand blasting and rust removing treatment of the steel bridge deck (1):
the steel bridge deck (1) is subjected to sand blasting and rust removing treatment by adopting an automatic dust-free sand blasting machine, and the used grinding material is stainless steel sand with the angular or round bead-shaped granularity of 0.7-1.0 mm. The cleanliness of the finally derusted steel plate reaches Sa2.5 grade, and the roughness reaches 70-100 mu m. After sand blasting and rust removal, the epoxy zinc-rich coating is guaranteed to be coated within 2 hours, the surface treatment can be carried out on the bridge deck blocks, and after the self-inspection and supervision inspection are qualified, the next step can be carried out after the experience collection;
c, laying an anticorrosive bonding layer (2):
in the construction process and before the coating is dried and cured, the environmental temperature is preferably kept at 5-38 ℃, the relative humidity is not more than 90%, and the air is circulated. When the wind speed is more than 5m/s or the rain and the surface of the component are exposed, the operation is not suitable. The temperature of the substrate is higher than the dew point by more than 3 ℃ during construction. Before use, the component A is stirred, so that the upper and lower layers of paint are uniform and no visible sediment or agglomeration exists. Mixing the component A and the component B according to the ratio of 10: 1, accurately weighing, and coating after standing for a period of time. Brushing a layer of epoxy zinc-rich primer on the surface of the steel bridge deck (1) by using a roller, and drying for about 12 hours, wherein the thickness of a paint film is 30-50 mu m; after the primer coated on the first layer is dried, the next layer is coated by the same method until the thickness of the anticorrosion bonding layer (2) reaches 1 mm. When in brush coating, the brush is required to be brushed in place, fully brushed and uniformly brushed. The next step can be carried out after the experience gathering grid;
step D, pouring of the ultra-high performance concrete (UHPC) plate (3):
and the anticorrosive bonding layer (2) is cleaned of dust and welding slag by a high-pressure air pipe before concrete pouring. The casting of UHPC should be performed and completed continuously to avoid skinning or cold seams on the exposed surfaces. Spreading the anti-corrosion bonding layer (2) on the concrete in a tank car transportation mode, after rough leveling by using a trowel, using aluminum alloy as a scraping rule, and continuously repeating for several times along the direction of a lane until the concrete is scraped, so that the leveled surface cannot be exposed with steel fibers and floating slurry is left, and the pavement flatness is ensured. After pouring, the concrete is immediately covered with wet cloth and sprayed with a curing agent to prevent surface moisture loss. The next step can be carried out after the experience gathering grid;
e, laying a sealing layer (4):
after the ultra-high performance concrete (UHPC) plate (3) is maintained, selecting the conditions that the air temperature is more than 20 ℃, the air relative humidity is less than 75 percent and the air speed is low, adopting polyurethane modified epoxy resin, wherein the volume ratio of the epoxy resin A to the epoxy resin curing agent B is 2: 1, using spraying equipment, and spraying amount is 0.26-0.32L/m2And the thickness of the sealing layer (4) after the polyurethane modified epoxy resin is cured is 1mm +/-0.5 mm, and the construction of the sealing layer is finished.
2. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the anti-corrosion bonding layer (2) is prepared from epoxy zinc-rich primer, and the ratio of the component A to the component B is 10: 1.
3. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the ultra-high performance concrete (UHPC) plate (3) is composed of cement, silica fume, fine aggregate (6), steel fiber (7) and a high-efficiency water reducing agent.
4. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the sealing layer (4) is prepared from polyurethane modified epoxy resin, the volume ratio of the epoxy resin A to the epoxy resin curing agent B is 2: 1, and the spraying amount is 0.26-0.32L/m2。
5. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the steel bridge deck (1) is welded with studs (5).
6. The peg (5) according to claim 5, wherein: the diameter of the stud head (51) of the stud (5) is 15mm, the diameter of the stud is 10mm, the height of the stud (5) is 30mm, the height of the stud head (51) is 10mm, and the distance is 300 multiplied by 300 mm.
7. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the water-cement ratio of the ultra-high performance concrete (UHPC) plate (3) is 0.1-0.2, the mixing amount of silica fume is 6-10%, the mixing amount of a water reducing agent is 0.5-0.6%, the mixing amount of steel fiber (7) is 0.5-2%, and the fineness modulus of the mixed fine aggregate (6) is 2.3-3.0.
8. The silica fume according to claim 7, wherein: the chemical component of the silica fume is SiO275-98% of Al2O30.8-1.2 percent of Fe by mass percentage2O30.6 to 1.2 percent of mass percent, 0.6 to 0.8 percent of MgO mass percent, 0.2 to 0.4 percent of CaO mass percent and 1.1 to 1.5 percent of NaO mass percent; the silica fume has fineness less than 1 μm and accounts for more than 80%, average particle size of 0.1-0.3 μm, and specific surface area of 20-28 m2/g。
9. A fine aggregate (6) according to claim 7, characterized in that: the fine aggregate (6) is China ISO standard sand SiO2The content is more than 96 percent, the ignition loss is not more than 0.40 percent, and the mud content (including soluble salts) is not more than 0.20 percent.
10. A steel fibre (7) according to claim 7, characterized in that: the steel fiber (7) is high-strength copper-plated micro-wire steel fiber.
11. The water reducing agent according to claim 7, characterized in that: the water reducing agent is a carboxylic acid high-efficiency water reducing agent.
12. The paving method of the novel bicycle lane steel bridge deck pavement layer structure according to claim 1, characterized in that: the thickness of the anti-corrosion bonding layer (2) is 1 mm; the thickness of the ultra-high performance concrete (UHPC) plate (3) is 40 mm; the thickness of the sealing layer (3) is 1 mm.
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