Lightweight high-strength durable material for steel bridge deck pavement and pavement structure of lightweight high-strength durable material

Abstract

The invention discloses a lightweight high-strength durable material for steel bridge deck pavement. The lightweight high-strength durable material comprises the following raw material components in parts by weight: 50-100 parts of polycarbonate, 20-40 parts of polyethylene glycol terephthalate, 5-10 parts of polyether polyol, 15-25 parts of polymer steel fibers, 5-10 parts of polymethyl methacrylate, 4-10 parts of composite whiskers, 1-5 parts of an elastic polymer and 1-3 parts of an initiator, the adopted paving material has the characteristics of good high and low temperature performance, synergistic deformability, light weight, high strength and fatigue resistance, and has good cohesiveness with the steel bridge deck slab, the paving layer material has good deformation compliance and high horizontal shear resistance to the steel bridge deck slab, and meanwhile, the paving layer material has good skid resistance and wear resistance, a wear-resistant layer does not need to be arranged on the paving layer, and the construction cost is reduced. The pavement performance is excellent, and the durability of bridge deck pavement can be greatly improved.

Description

Technical Field

[0001] The invention relates to steel bridge deck pavement, and in particular to a light, high-strength and durable material used for steel bridge deck pavement and a pavement structure thereof. Background Art

[0002] Steel bridge deck refers to the bridge deck structure formed by welding or bolting steel plates. Steel bridge decks are usually composed of steel plates, supporting structures and other parts. Steel bridge deck pavement refers to the protective layer laid on the steel bridge deck to prevent the wheels (or tracks) from directly wearing the bridge deck, spread the wheel load, and provide a flat and non-slip driving surface for vehicles. Existing steel bridge deck pavement generally uses asphalt concrete, but the requirements for light weight, high strength and durability of steel bridge deck pavement for long-span bridges are getting higher and higher. The existing asphalt concrete steel bridge deck pavement increases the difficulty of building long-span steel bridges due to its large thickness, high density and constant load. At the same time, asphalt pavement has limited deformation capacity and high temperature sensitivity. Under the domestic high temperature and heavy load conditions, there are diseases such as cracking and rutting of the pavement layer, which results in the service life of steel bridge deck pavement being only about 10 years, so it cannot meet the 100-year service life requirement of long-span steel bridges.

[0003] Therefore, a high-quality, strong and durable material is needed for steel bridge deck pavement, so that the steel bridge deck pavement layer has excellent strength and mechanical properties, while achieving material lightweight and improving the durability of the steel bridge deck pavement to meet the material and structure requirements of large-span steel bridge deck pavement. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a lightweight, high-strength and durable material for steel bridge deck paving and its paving structure, so that the steel bridge deck pavement layer has excellent strength and mechanical properties, while achieving material lightweight and improving the durability of the steel bridge deck pavement to meet the requirements of large-span steel bridge deck paving for materials and structures.

[0005] The light, high-strength and durable material for steel bridge deck paving of the present invention comprises the following components in parts by weight: 50-100 parts of polycarbonate, 20-40 parts of polyethylene terephthalate, 5-10 parts of polyether polyol, 15-25 parts of polymer steel fiber, 5-10 parts of polymethyl methacrylate, 4-10 parts of composite whiskers, 1-5 parts of elastic polymer and 1-3 parts of initiator;

[0006] Further, the raw materials include the following components by weight: 80 parts of polycarbonate, 30 parts of polyethylene terephthalate, 7 parts of polyether polyol, 20 parts of polymer steel fiber, 7 parts of polymethyl methacrylate, 6 parts of composite whiskers, 3 parts of elastic polymer, and 2 parts of initiator;

[0007] Further, the polymer steel fiber is a mixture of steel fiber and polyvinyl alcohol fiber;

[0008] Further, in terms of mass ratio, steel fiber: polyvinyl alcohol fiber = 3:1;

[0009] Furthermore, the composite whisker is a composite of silicon carbide whiskers and mullite whiskers, the silicon carbide whiskers and mullite whiskers are entangled with each other by ball milling to form a granular aggregate, and then bonded by epoxy resin to form particles;

[0010] Furthermore, the elastic polymer is prepared by mixing epoxy glycidyl ether containing furan-maleimide reversible covalent bonds with octanediol glycidyl ether, reacting them with a curing agent after a ring-opening addition reaction;

[0011] Furthermore, the initiator is maleic anhydride.

[0012] The present invention also discloses a steel bridge deck pavement structure, comprising a bridge deck and a pavement layer, and a connection reinforcement layer located between the bridge deck and the pavement layer, wherein the pavement layer is the above-mentioned lightweight, high-strength and durable material for steel bridge deck pavement;

[0013] Further, the connection reinforcement layer is GA10 poured asphalt concrete;

[0014] Furthermore, the thickness of the pavement layer is 1-2 cm, and the thickness of the connection reinforcement layer is 2-3 cm.

[0015] Beneficial effects of the present invention: The lightweight, high-strength and durable material for steel bridge deck paving and its paving structure of the present invention, the paving material used has good high and low temperature performance, coordinated deformation, light weight and high strength, fatigue resistance, and has good adhesion with the steel bridge deck. The paving layer material has good deformation tracking ability for the steel bridge deck, high horizontal shear resistance, and good anti-slip and wear resistance. There is no need to set a wear-resistant layer on the paving layer. It has excellent road performance and can greatly improve the durability of the bridge deck paving. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the steel bridge deck pavement structure of the present invention. DETAILED DESCRIPTION

[0018] For a better understanding of the present invention, the following examples are provided to further illustrate the present invention, but the present invention is not limited to the following examples.

[0019] In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0020] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in parts by weight of raw materials: 50-100 parts of polycarbonate, 20-40 parts of polyethylene terephthalate, 5-10 parts of polyether polyol, 15-25 parts of polymer steel fiber, 5-10 parts of polymethyl methacrylate, 4-10 parts of composite whiskers, 1-5 parts of elastic polymer and 1-3 parts of initiator. Polycarbonate and polyethylene terephthalate undergo polymerization reaction under the initiator to improve the high temperature performance, interfacial bonding performance and fatigue resistance of the paving layer. Polyether polyol is used as a soft segment. The addition of polyether polyol can not only improve the structural strength of the paving layer, but also improve the bonding force between the components. At the same time, it has a stronger grip on the polymer steel fiber in the material, which can effectively prevent the paving layer from cracking. The combination of polyether polyol and polymer steel fiber has a synergistic effect on improving the flexural tensile strength, flexural toughness and fracture toughness of the pavement material formed by components such as polycarbonate and polyethylene terephthalate. The addition of polymethyl methacrylate is used to improve the compressive strength of the binder, and polymethyl methacrylate can increase the compatibility between the components. Composite whiskers effectively improve the durability of the material's anti-slip performance and further improve the material's anti-slip performance. The elastic polymer with a three-dimensional network structure can not only enhance the bonding force between the components and improve the structural strength of the pavement layer, but also play a role in crack repair. More importantly, the elastic polymer with a three-dimensional network structure can enhance the deformation follow-up of the pavement material to the steel bridge deck and improve the horizontal shear resistance of the pavement layer.

[0021] A preferred embodiment is that the raw materials include the following components by weight: 80 parts of polycarbonate, 30 parts of polyethylene terephthalate, 7 parts of polyether polyol, 20 parts of polymer steel fiber, 7 parts of polymethyl methacrylate, 6 parts of composite whiskers, 3 parts of elastic polymer, and 2 parts of initiator; the effect of this embodiment is relatively good.

[0022] In this embodiment, the polymer steel fiber is a mixture of steel fiber and polyvinyl alcohol fiber; in terms of mass ratio, steel fiber: polyvinyl alcohol fiber = 3:1; the combination of steel fiber and polyvinyl alcohol fiber can play a role in crack resistance and reinforcement.

[0023] In this embodiment, the composite whisker is a composite of silicon carbide whiskers and mullite whiskers. The silicon carbide whiskers and mullite whiskers are entangled with each other through ball milling to form a granular aggregate, and then bonded with epoxy resin to form particles. The granular aggregates are entangled with each other to disperse the internal stress generated by friction, thereby reducing the wear of the anti-slip surface caused by long-term use of the material, reducing the friction coefficient, effectively improving the durability of the anti-slip performance of the material, and further improving the anti-slip performance of the material.

[0024] In this embodiment, the elastic polymer is prepared by mixing epoxy glycidyl ether containing furan-maleimide reversible covalent bonds and octanediol glycidyl ether, reacting with a curing agent after a ring-opening addition reaction; the epoxy glycidyl ether containing furan-maleimide reversible covalent bonds is dissolved in dichloromethane, and then octanediol glycidyl ether is added, mixed evenly under ultrasound, and then an equivalent amount of polyetheramine curing agent is added and mixed evenly, and then poured into a pretreated stainless steel mold, and the dichloromethane solvent and bubbles are removed in a vacuum drying oven, and then cured at 35°C for 2h and 75°C for 12h to obtain a three-dimensional network structure elastic polymer.

[0025] In this embodiment, the initiator is maleic anhydride.

[0026] The method for preparing a lightweight, high-strength and durable material for steel bridge deck paving comprises the following steps:

[0027] Mix polycarbonate, polyethylene terephthalate and initiator and stir; then add polymer steel fiber and composite whisker and stir evenly, finally add polyether polyol, polymethyl methacrylate, composite whisker and elastic polymer and stir; add the obtained mixture into a pulverizer and grind it into powder; add the obtained powder mixture into a twin-screw extruder preheated to 200-250°C, extrude, cool to room temperature, and granulate to obtain the product.

[0028] The present embodiment also discloses a steel bridge deck pavement structure, including a bridge deck 3 and a pavement layer 1, and a connection reinforcement layer 2 located between the bridge deck and the pavement layer, wherein the pavement layer 3 is the above-mentioned lightweight, high-strength and durable material for steel bridge deck pavement; the connection reinforcement layer 2 is GA10 cast asphalt concrete; GA10 cast asphalt concrete has good deformation conformity, ensures effective bonding between the pavement layer 1 and the steel plate 3, and improves the integrity of the pavement. The smaller the thickness of the pavement layer, the greater the dynamic stability of the pavement structure. Therefore, the thickness of the pavement layer is 1-2cm, and the thickness of the connection reinforcement layer is 2-3cm. Preferably, the thickness of the pavement layer is 2cm, and the thickness of the connection reinforcement layer is 3cm.

[0029] Embodiment 1

[0030] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of weight of raw materials: 50 parts of polycarbonate, 20 parts of polyethylene terephthalate, 5 parts of polyether polyol, 15 parts of polymer steel fiber, 5 parts of polymethyl methacrylate, 4 parts of composite whiskers, 1 part of elastic polymer and 1 part of initiator.

[0031] Embodiment 2

[0032] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of weight: 100 parts of polycarbonate, 40 parts of polyethylene terephthalate, 10 parts of polyether polyol, 25 parts of polymer steel fiber, 10 parts of polymethyl methacrylate, 10 parts of composite whiskers, 5 parts of elastic polymer and 3 parts of initiator.

[0033] Embodiment 3

[0034] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of raw materials by weight: 50 parts of polycarbonate, 40 parts of polyethylene terephthalate, 5 parts of polyether polyol, 25 parts of polymer steel fiber, 5 parts of polymethyl methacrylate, 10 parts of composite whiskers, 1 part of elastic polymer and 3 parts of initiator.

[0035] Embodiment 4

[0036] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of weight: 100 parts of polycarbonate, 24 parts of polyethylene terephthalate, 8 parts of polyether polyol, 17 parts of polymer steel fiber, 9 parts of polymethyl methacrylate, 6 parts of composite whiskers, 2 parts of elastic polymer and 2 parts of initiator.

[0037] Embodiment 5

[0038] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of weight of raw materials: 60 parts of polycarbonate, 35 parts of polyethylene terephthalate, 8 parts of polyether polyol, 22 parts of polymer steel fiber, 7 parts of polymethyl methacrylate, 6 parts of composite whiskers, 2 parts of elastic polymer and 1 part of initiator.

[0039] Embodiment 6

[0040] The lightweight, high-strength and durable material for steel bridge deck paving of this embodiment comprises the following components in terms of weight of raw materials: 80 parts of polycarbonate, 30 parts of polyethylene terephthalate, 7 parts of polyether polyol, 20 parts of polymer steel fiber, 7 parts of polymethyl methacrylate, 6 parts of composite whiskers, 3 parts of elastic polymer and 2 parts of initiator.

[0041] In the above embodiment, the polymer steel fiber is a mixture of steel fiber and polyvinyl alcohol fiber; in terms of mass ratio, steel fiber: polyvinyl alcohol fiber = 3:1; the composite whisker is a composite of silicon carbide whisker and mullite whisker, the silicon carbide whisker and mullite whisker are entangled with each other through ball milling to form a granular aggregate, and then bonded by epoxy resin to form particles; the elastic polymer is prepared by mixing epoxy glycidyl ether containing furan-maleimide reversible covalent bonds with octanediol glycidyl ether, reacting with a curing agent after a ring-opening addition reaction; the initiator is maleic anhydride.

[0042] The bridge deck paving materials prepared in Examples 1-6 are paved on the steel bridge deck to form the following Figure 1 The structure shown in the figure was tested for tensile strength (23℃), elongation at break (23℃), dynamic stability, three-point bending strain, pull-out strength with steel plate (25℃), and shear strength with steel plate (25℃). The results are shown in the following table; among them, tensile strength (23℃), elongation at break (23℃) and were tested in accordance with GB / T 2567-2008 Test method for properties of resin castings; dynamic stability was tested in accordance with the corresponding method of T0719 Rutting test for asphalt mixture in JTGE20-2011 Test procedure for asphalt and asphalt mixture for highway engineering; three-point bending strain was tested in accordance with the corresponding method of T0715 Bending test for asphalt mixture in JTG E20-2011 Test procedure for asphalt and asphalt mixture for highway engineering; pull-out strength with steel plate (25℃) and shear strength with steel plate (25℃) were respectively tested in accordance with JC / T The 50℃ bonding strength and 50℃ shear strength in "9752005 Waterproof Coatings for Roads and Bridges" were tested according to the corresponding test methods, except for the following parameters: During the experiment, the specimens were placed at 25±2℃ for 4h.

[0043] Test results:

[0044]

[0045]

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A lightweight, high-strength and durable material for steel bridge deck paving, characterized by: The raw materials include the following components by weight: 50-100 parts of polycarbonate, 20-40 parts of polyethylene terephthalate, 5-10 parts of polyether polyol, 15-25 parts of polymer steel fiber, 5-10 parts of polymethyl methacrylate, 4-10 parts of composite whisker, 1-5 parts of elastic polymer and 1-3 parts of initiator.

2. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 1 is characterized by: The raw materials include the following components by weight: 80 parts of polycarbonate, 30 parts of polyethylene terephthalate, 7 parts of polyether polyol, 20 parts of polymer steel fiber, 7 parts of polymethyl methacrylate, 6 parts of composite whiskers, 3 parts of elastic polymer, and 2 parts of initiator.

3. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 1 is characterized in that: The polymer steel fiber is a mixture of steel fiber and polyvinyl alcohol fiber.

4. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 3 is characterized by: By mass ratio, steel fiber: polyvinyl alcohol fiber = 3:

1.

5. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 1 is characterized in that: The composite whisker is a composite of silicon carbide whisker and mullite whisker. The silicon carbide whisker and the mullite whisker are entangled with each other through ball milling to form a granular aggregate, and then bonded by epoxy resin to form particles.

6. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 1 is characterized by: The elastic polymer is prepared by mixing epoxy glycidyl ether containing furan-maleimide reversible covalent bond and octanediol glycidyl ether, undergoing ring-opening addition reaction, and then reacting with a curing agent.

7. The lightweight, high-strength and durable material for steel bridge deck paving according to claim 1 is characterized by: The initiator is maleic anhydride.

8. A steel bridge deck pavement structure, characterized in that: It comprises a bridge deck and a pavement layer, and a connection reinforcement layer located between the bridge deck and the pavement layer. The pavement layer is the lightweight, high-strength and durable material for steel bridge deck pavement as described in claim 1.

9. The steel bridge deck pavement structure according to claim 8, characterized in that: The connection reinforcement layer is GA10 poured asphalt concrete.

10. The steel bridge deck pavement structure according to claim 9, characterized in that: The thickness of the paving layer is 1-2 cm, and the thickness of the connection reinforcement layer is 2-3 cm.

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