Multifunctional composite bridge deck longitudinal splicing structure and construction method thereof

Abstract

The invention relates to the technical field of old concrete bridge longitudinal splicing structures, in particular to a multifunctional composite bridge deck longitudinal splicing structure and a construction method thereof. The technical key points are as follows: the splicing structure comprises a polyurethane anti-skid wearing layer paved on the surface functional layer from top to bottom; the anti-crack enhanced high polymer elastic and toughened body is laid on the upper surface layer; the invention discloses a self-adhesive hyperbranched toughened epoxy asphalt polyester glass fabric. The drainage liquid-permeable high polymer elastic and toughened body is laid on the lower surface layer; a carbon fiber reinforced epoxy resin laminate; the splicing structure is arranged in a notch formed by reverse excavation of asphalt pavement of an original bridge deck. The positions, making contact with the splicing structure, of the bottom and the two sides of the notch are coated with a high-resolution bullet firmware interface binder. According to the bridge deck longitudinal splicing, the drainage type asphalt pavement structure is introduced, and the pavement damage caused by water partition between old concrete bridge deck pavement layers in a traditional disposal mode is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of longitudinal splicing structures of old concrete bridges, and in particular to a multifunctional composite bridge deck longitudinal splicing structure and a construction method thereof. Background Art

[0002] With the acceleration of urbanization, bridge construction has received more and more attention. As an important part of the bridge, the requirements for the safety, durability, and comfort of the bridge deck structure are becoming higher and higher. In the bridge deck structure, the design and construction of the longitudinal splicing structure have an important impact on the overall performance of the bridge deck.

[0003] Bridge deck splicing is often treated by continuous paving of asphalt mixture or modular longitudinal expansion joints. After a short period of use, continuous paving of asphalt mixture will be affected by stress concentration at the bottom of the splicing, which will cause cracking and damage, leading to water seepage and affecting the safety of the main body of the new and old bridge structures. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional composite bridge deck longitudinal splicing structure and a construction method thereof. Through the invention and application of the multifunctional composite bridge deck longitudinal splicing structure, materials and construction methods thereof, the problems of poor safety and insufficient durability of the splicing joints of new and old bridges are effectively solved.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] The present invention provides a multifunctional composite bridge deck longitudinal splicing structure, the splicing structure comprising, from top to bottom:

[0007] A polyurethane anti-skid wear layer laid on the surface functional layer;

[0008] The crack-resistant reinforced polymer elastomer laid on the upper layer;

[0009] Self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth;

[0010] The drainage and liquid-permeable polymer elastomer laid on the lower layer;

[0011] Carbon fiber reinforced epoxy resin laminate;

[0012] The splicing structure is arranged in the notch formed by reverse excavation of the original bridge deck asphalt pavement;

[0013] The bottom of the notch and the positions on both sides that contact the splicing structure are coated with a high molecular elastic interface adhesive.

[0014] Furthermore, the polymer elastic-flexible interface adhesive comprises the following components calculated by weight:

[0015] 0.3-0.8 parts of multi-walled carbon nanotubes, 35-45 parts of hyperbranched epoxy resin and 55-65 parts of SBS modified asphalt.

[0016] Further, a carbon fiber reinforced epoxy resin laminate comprises a carbon fiber and epoxy resin laminate;

[0017] The carbon fiber accounts for 5-15% of the total mass of the carbon fiber reinforced epoxy resin laminate.

[0018] Furthermore, calculated by weight, the drainage and liquid-permeable polymer elastomer includes the following components: 2 to 3 parts of two-component solvent-free high-temperature curing polyurethane, 3 to 4 parts of polymer elastomer binder, 90 to 110 parts of graded aggregate and 1 to 3 parts of composite fiber.

[0019] Furthermore, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth comprises the following components, calculated by weight:

[0020] 40-50 parts of hyperbranched epoxy resin, 45-60 parts of SBS modified asphalt and 200 parts of polyester glass fiber cloth.

[0021] Furthermore, the crack-resistant enhanced polymer elastomer comprises the following components, calculated by weight:

[0022] 26-30 parts of polymer elastic-ductile binder, 70-74 parts of single-graded particle size aggregate and 0.3 parts of high-strength composite fiber.

[0023] Furthermore, the polyurethane anti-skid wear layer comprises the following components, calculated by weight:

[0024] 20-25 parts of two-component solvent-free high-temperature curing polyurethane, 0.7-1.3 parts of SBS modified asphalt and 100 parts of graded aggregate.

[0025] Further, the hyperbranched epoxy resin is prepared from the following components, calculated by weight:

[0026] 7-12 parts of disodium ethylenediaminetetraacetate, 28-33 parts of polyester polyol, 55-65 parts of E51 epoxy resin, and 40-45 parts of a mixture of long-chain fatty amine derivatives such as octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether.

[0027] Further, calculated by weight, the SBS modified asphalt includes the following components:

[0028] 92-96 parts of 70# base asphalt, 4-8 parts of SBS modifier, 0.3-1 part of stabilizer, 0.5-2 parts of sulfur, 0.1-0.3 parts of anti-yellowing agent and 0.1-0.3 parts of antioxidant.

[0029] The present invention also provides a construction method of a multifunctional composite bridge deck longitudinal splicing structure, comprising the following steps:

[0030] S1. According to the design position, at the joint of the new and old bridges, the original bridge deck asphalt concrete is reversely excavated along the joint to form a notch, and the notch is cleaned to remove the surface concrete slurry to ensure the notch is clean;

[0031] S2. Fill the joint with expansion foam strips, symmetrically arrange carbon fiber reinforced epoxy resin laminates along the edges of both sides of the joint, and fix them to the old concrete beams with spiral bolts. The bolts should be implanted to a depth of not less than 16 cm, and structural adhesive should be embedded in the bolt holes.

[0032] S3. Apply high polymer elastic toughness interface adhesive along the bottom of the groove, with a coating thickness of not less than 4mm, and no missing coating is allowed;

[0033] S4. Mix two-component solvent-free high-temperature curing polyurethane, add SBS modified asphalt after mixing evenly, mix with the graded aggregate and composite fiber used in the lower layer to form a drainage and liquid-permeable polymer elastic body, and pave it at the bottom of the groove with a paving thickness of 4 to 6 cm;

[0034] S5, heating the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth at 110-130° C. for 2-3 minutes, and laying it on the upper surface of the drainage and liquid-permeable polymer elastic toughness;

[0035] S6, apply polymer elastic toughness interface adhesive, the coating thickness is 2-4mm, mix anti-cracking enhanced polymer elastic toughness, paving thickness is 1.5-2.5cm, apply polymer elastic toughness interface adhesive again, the coating thickness is 2-4mm, paving anti-cracking enhanced polymer elastic toughness with a thickness of 1.5-2.5cm, when the temperature reaches 90-100°C, use polymer elastic toughness binder for surface sealing, the surface sealing thickness is 0.2-0.3cm;

[0036] S7. When the surface seal layer is cooled to below 50°C in the cooling room, mix the two-component solvent-free high-temperature curing polyurethane for 2 to 3 minutes. After stirring evenly, apply it on the surface seal layer and use a synchronous spreading vehicle for sticky layer gravel to spread it. The sticky layer spreading amount is 0.4kg / m 2 ~0.5kg / m 2 , spread pre-coated asphalt graded corundum 1.7kg / m 2 ~2.4kg / m 2 , and roll it until the surface is flat.

[0037] In summary, the present invention has the following beneficial effects:

[0038] The longitudinal splicing of the bridge deck provided by the present invention introduces a drainage asphalt pavement structure to continuously pass the water between the asphalt pavement layers of the new and old pavements, drain it to the side ditch through the transverse slope of the bridge, and discharge it to the ground along the longitudinal slope of the bridge, effectively solving the pavement defects caused by the traditional disposal method of isolating the water between the pavement layers of the old concrete bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a structural schematic diagram of the gradient flexible splicing structure of the tunnel pavement deformation joint in an embodiment of the present invention.

[0041] Figure numerals: 1. Polymer elastomer interface adhesive; 2. Crack-resistant enhanced polymer elastomer; 3. Self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth; 4. Drainage and liquid-permeable polymer elastomer; 5. Carbon fiber reinforced epoxy resin laminate; 6. Polyurethane anti-skid wear layer. DETAILED DESCRIPTION

[0042] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, a multifunctional composite bridge deck longitudinal splicing structure and a construction method thereof proposed according to the present invention, its specific implementation method, characteristics and effects are described in detail as follows.

[0043] In this specific embodiment, the sources of commercially available materials are as follows:

[0044] Multi-walled carbon nanotubes: Shandong Tanfeng New Materials Technology Co., Ltd.;

[0045] Disodium ethylenediaminetetraacetate: China Airlines Chemical Co., Ltd.;

[0046] Polyester polyol: Wanhua Chemical Group Co., Ltd.

[0047] E51 epoxy resin: Zhonglu Jiaoke Technology Co., Ltd.;

[0048] Rubber toughening agent: Zhonglu Jiaoke Technology Co., Ltd.;

[0049] Oleylamine coupling agent: China Road and Transportation Science and Technology Co., Ltd.

[0050] Stabilizer: Zhonglu Jiaoke Technology Co., Ltd.;

[0051] Sulfur: Shanghai Kaiyin Chemical Co., Ltd.;

[0052] Anti-yellowing agent: Henan Ruiqite Chemical Co., Ltd.

[0053] Antioxidant: Henan Ruiqite Chemical Co., Ltd.;

[0054] Carbon fiber reinforced epoxy resin laminate: Shenzhen Hongtai Jinyue Technology Co., Ltd.;

[0055] Polyether polyol: Wanhua Chemical Group Co., Ltd.

[0056] Aromatic isocyanate: Wanhua Chemical Group Co., Ltd.

[0057] Diethyltoluenediamine: Wanhua Chemical Group Co., Ltd.

[0058] Basalt fiber: Shandong Taicheng Fiber Co., Ltd.;

[0059] Glass fiber: Shandong Taicheng Fiber Co., Ltd.;

[0060] 90# asphalt: Jiangsu Zhongyitong Road New Materials Co., Ltd.;

[0061] Nano-scale devulcanized rubber powder: Suzhou Runjieer Environmental Protection New Materials Co., Ltd.

[0062] Organic bentonite: Suzhou Runjieer Environmental Protection New Materials Co., Ltd.;

[0063] Compatibilizer: Jiaxing Huawen Chemical Co., Ltd.

[0064] Basalt aggregate: Hangzhou Yabang New Materials Co., Ltd.;

[0065] High-strength and lightweight glass fiber: Shandong Taicheng Fiber Co., Ltd.;

[0066] Emery: Hangzhou Yabang New Materials Co., Ltd.

[0067] This specific embodiment provides a multifunctional composite bridge deck longitudinal splicing structure, which includes, from top to bottom:

[0068] A polyurethane anti-skid wear layer 6 laid on the surface functional layer;

[0069] A crack-resistant reinforced polymer elastic toughness 2 laid on the upper layer;

[0070] Self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3;

[0071] The drainage and liquid-permeable polymer elastomer 4 and the carbon fiber reinforced epoxy resin laminate 5 laid on the lower layer;

[0072] The splicing structure is set in the groove formed by the reverse excavation of the original bridge deck asphalt pavement;

[0073] The bottom of the notch and the positions on both sides where the notch contacts the splicing structure are coated with a polymer elastic-flexible interface adhesive 1.

[0074] Exemplarily, calculated by weight, the polymer elastic-flexible interface adhesive 1 provided in this specific embodiment includes the following components:

[0075] 0.3-0.8 parts of multi-walled carbon nanotubes, 35-45 parts of hyperbranched epoxy resin and 55-65 parts of SBS modified asphalt.

[0076] Exemplarily, calculated by weight, the drainage and liquid-permeable polymer elastomer 4 used in this specific embodiment includes the following components: 2 to 3 parts of two-component solvent-free high-temperature curing polyurethane, 3 to 4 parts of polymer elastomer binder, 90 to 110 parts of graded aggregate and 1 to 3 parts of composite fiber.

[0077] In some optional embodiments, the polymer elastomer binder includes the following components, calculated by weight: 20-25 parts of nano-grade desulfurized rubber powder, 4-6 parts of SBS modifier, 4-6 parts of rubber oil, 5-10 parts of organic bentonite and 5 parts of compatibilizer H105.

[0078] In some optional embodiments, the graded aggregate used for the drainage and liquid-permeable polymer elastomer 4 meets the following conditions: the mass passing through the 13.2 mm sieve hole is 100%, the mass passing through the 9.5 mm sieve hole is 85-100%, the mass passing through the 4.75 mm sieve hole is 15-30%, the mass passing through the 2.36 mm sieve hole is 10-25%, the mass passing through the 0.6 mm sieve hole is 5-10%, and the mass passing through the 0.075 mm sieve hole is 6-8%.

[0079] In some optional embodiments, the composite fiber includes, calculated by weight, 60-70 parts of basalt fiber and 30-40 parts of glass fiber; wherein the average diameter of the composite fiber is 2-5 μm, and the average length is 4-6 mm.

[0080] For example, in order to further improve the interlayer shear resistance, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 used in this specific embodiment includes the following components, calculated by weight:

[0081] 40-50 parts of hyperbranched epoxy resin, 45-60 parts of SBS modified asphalt and 200 parts of polyester glass fiber cloth.

[0082] Exemplarily, calculated by weight, the anti-crack enhanced polymer elastomer 2 used in this specific embodiment includes the following components:

[0083] 26-30 parts of polymer elastic-ductile binder, 70-74 parts of single-graded particle size aggregate and 0.3 parts of high-strength composite fiber.

[0084] In some optional embodiments, the single-graded particle size aggregate used in the crack-resistant enhanced polymer elastomer 2 meets the following conditions: basalt aggregate with a particle size passing through a sieve hole of 13.2mm to 19mm is selected, the mass passing through the 13.2mm sieve hole is 0%, the mass passing through the 16mm sieve hole is 10% and the mass passing through the 19mm sieve hole is 100%, the crushing value is ≤22%, the water absorption rate is ≤1.5%, the Los Angeles abrasion loss is ≤25%, and the strength is ≤10%.

[0085] Under certain pressure conditions, the 16-19mm single particle size crack-resistant reinforced polymer elastomer 2 gradually forms a void skeleton structure after the aggregate is squeezed, which effectively limits the deformation of the pavement structure. The high oil-stone ratio condition and high elastic recovery polymer elastomer binder effectively increase horizontal and vertical deformations, greatly reducing the reflective crack disease of the pavement structure.

[0086] In some optional embodiments, the high-strength composite fiber, calculated by weight, includes: 70-80 parts of boron fiber and 20-30 parts of high-strength lightweight glass fiber; the tensile strength at 23°C is greater than 2500MPa, and the Young's modulus at 23°C is greater than 4000GPa.

[0087] Exemplarily, the carbon fiber reinforced epoxy resin laminate 5 used in this embodiment includes a carbon fiber and epoxy resin laminate;

[0088] Wherein, the carbon fiber accounts for 5 to 15% of the total mass of the carbon fiber reinforced epoxy resin laminate 5;

[0089] The preparation method is as follows:

[0090] The carbon fiber and epoxy resin laminate 5 is laid in a unidirectional layered manner in a self-interlocking manner, with 80 to 100 layers laid, hot pressed between heated templates of a vulcanizer at 120° C. for 17 hours, and cured at 200° C. for 2 hours, with a thickness of 1 to 1.5 cm.

[0091] It can be understood that in the splicing structure provided in this specific embodiment, the splicing structure, as a connection point connecting the new and old pavement structures, needs to have better dynamic load capacity and resistance performance under impact load. Therefore, the carbon fiber and epoxy resin laminate provided in this specific embodiment adopts a self-interlocking method, so that the laminate can evenly disperse the force when subjected to lateral force, thereby improving the resistance performance to impact loads, and the unidirectional layered laying can effectively disperse the externally applied load and reduce stress concentration. The hot pressing process at 120°C and the curing treatment at 200°C are adopted to ensure the good bonding between the epoxy resin and the carbon fiber, forming a dense material structure. This density not only improves the mechanical properties of the laminate, but also reduces bubbles and defects, and enhances the durability and stability of the laminate; it is more suitable for bridge pavement structures that withstand complex working conditions such as vehicle traffic and environmental changes.

[0092] In terms of processing performance, hyperbranched epoxy resin exhibits better fluidity, lower viscosity and high solid content, enabling it to form a uniform and dense layer during coating and pouring, greatly improving the overall performance and appearance of the material.

[0093] In terms of environmental resistance and chemical resistance, hyperbranched epoxy resins exhibit better performance than traditional epoxy resins. Their unique branching structure enhances resistance to moisture, ultraviolet rays and chemicals, and maintains stable performance under harsh conditions, making them suitable for applications such as bridges that are exposed to the external environment for a long time.

[0094] Exemplarily, calculated by weight, the polyurethane anti-skid wear layer 6 used in this specific embodiment includes the following components:

[0095] 20-25 parts of two-component solvent-free high-temperature curing polyurethane, 0.7-1.3 parts of SBS modified asphalt and 100 parts of graded aggregate.

[0096] In some optional embodiments, the graded aggregate used in the polyurethane anti-skid wear layer 6 meets the following conditions: the mass of corundum passing through a 4.75 mm sieve hole is 0%, the mass of corundum passing through a 2.36-4.75 mm sieve hole is 2-20%, the mass of corundum passing through a 1.18-2.36 mm sieve hole is 40-85%, the mass of corundum passing through a 0.6-1.18 mm sieve hole is 10-45%, and the mass of corundum passing through a 0.6 mm sieve hole is 5-10%.

[0097] The polyurethane anti-skid wear layer 6 effectively improves driving safety in rainy weather, and the low-viscosity and high-elastic asphalt binder used has excellent durability.

[0098] The surface of the corundum is pre-coated with SBS modified asphalt, and the pre-coating oil-stone ratio is 0.8-1.2%.

[0099] In some optional embodiments, the hyperbranched epoxy resin used in the polymer elastic toughness interface adhesive 1 and the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 is prepared from the following components in parts by weight:

[0100] 7-12 parts of disodium ethylenediaminetetraacetate, 28-33 parts of polyester polyol, 55-65 parts of E51 epoxy resin, and 40-45 parts of a mixture of long-chain fatty amine derivatives such as octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether.

[0101] Hyperbranched epoxy resin is a polymer with a highly branched structure. The branched structure of hyperbranched epoxy resin provides higher space utilization and has more reaction sites. This structure enables it to form a dense three-dimensional network during the curing process, giving the hyperbranched epoxy resin higher tensile strength and compressive strength, making it perform well in load-bearing structures, thereby significantly improving the mechanical properties and durability of the material, especially suitable for applications such as bridges that need to withstand large loads.

[0102] In this embodiment, the hyperbranched epoxy resin has better adhesion, so that it can form a strong interface bond when combined with materials such as polyester glass fiber cloth and asphalt. This efficient cross-linking ability and good fluidity ensure the connection strength of the splicing area of ​​the new and old bridges, and prevent problems such as peeling and cracking.

[0103] In some optional embodiments, the drainage and liquid-permeable polymer elastic toughness 4 and the polyurethane anti-skid wear layer 6 adopt a two-component solvent-free high-temperature curing polyurethane, which includes the following components in parts by weight:

[0104] The component A is composed of 80-85 parts of oligomer polyether polyol and aromatic isocyanate, and the component B is composed of 15-20 parts of diethyltoluenediamine, anti-yellowing agent and antioxidant.

[0105] Wherein, component A: 4-12 parts of oligomer polyether polyol and 10-18 parts of aromatic isocyanate;

[0106] Component B: 4-8 parts of diethyltoluenediamine, 0.1-0.3 parts of anti-yellowing agent and antioxidant.

[0107] The two-component solvent-free high-temperature curing polyurethane provided in this specific embodiment has excellent bonding properties, ensuring strong bonding with the substrate, reducing the risk of peeling and cracking, and enhancing the stability of the overall structure. The wear resistance and anti-slip properties of the polyurethane further improve the safety of the paved surface and reduce the risk of slipping.

[0108] In terms of construction, the two-component system simplifies the construction process, the modular mixing equipment ensures the uniformity and quality of the materials, improves construction efficiency, and the fluidity and self-leveling properties of the materials enable it to adapt to complex environments and facilitate rapid construction.

[0109] In some optional embodiments, the polymer elastic toughness interface adhesive 1, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 and the SBS modified asphalt used in the polyurethane anti-skid wear layer 6 include the following components calculated by weight:

[0110] 92-96 parts of 70# base asphalt, 4-8 parts of SBS modifier, 0.3-1 part of stabilizer, 0.5-2 parts of sulfur, 0.1-0.3 parts of anti-yellowing agent and 0.1-0.3 parts of antioxidant.

[0111] This specific embodiment also provides a construction method of a multifunctional composite bridge deck longitudinal splicing structure, comprising the following steps:

[0112] S1. According to the design position, at the joint of the new and old bridges, the original bridge deck asphalt concrete is reversely excavated along the joint to form a notch, and the notch is cleaned to remove the surface concrete slurry to ensure the notch is clean;

[0113] S2. Fill the joint with expansion foam strips, symmetrically arrange carbon fiber reinforced epoxy resin laminates 5 along the edges of both sides of the joint, and fix them to the old concrete beams with spiral bolts. The bolts are implanted to a depth of not less than 16 cm, and structural adhesive for embedding steel bars is embedded in the bolt holes.

[0114] S3. Apply polymer elastic toughness interface adhesive 1 along the bottom of the groove, with a coating thickness of not less than 4 mm, and no omissions or omissions are allowed;

[0115] S4, using modular mixing equipment to mix two-component solvent-free high-temperature curing polyurethane, after mixing for 2 minutes, add SBS modified asphalt and mix again for 2 minutes, and mix with the graded aggregate and composite fiber used in the lower layer at 180℃ for 180 seconds to form a drainage and liquid-permeable polymer elastic toughness 4, which is paved at the bottom of the groove with a paving thickness of 5cm;

[0116] S5, heating the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 at 120° C. for 2 min, and laying it on the upper surface of the drainage and liquid-permeable polymer elastic toughness;

[0117] S6, apply polymer elastic toughness interface adhesive 1, the coating thickness is 3mm, mix the anti-cracking enhanced polymer elastic toughness 2, the paving thickness is 2cm, apply polymer elastic toughness interface adhesive again, the coating thickness is 3mm, the paving thickness is 2cm of anti-cracking enhanced polymer elastic toughness 2, when the temperature is about to reach 90-100°C, preferably 95°C, use polymer elastic toughness adhesive to seal the surface, the surface sealing thickness is 0.2cm;

[0118] S7. When the surface seal layer is cooled to below 50℃ in the cooling room, mix the two-component solvent-free high-temperature curing polyurethane for 2 minutes. After stirring evenly, apply it on the surface seal layer and use a synchronous spreading vehicle for sticky layer gravel. The sticky layer spreading amount is 0.4kg / m 2 ~0.5kg / m 2 , preferably 0.45kg / m 2 , spread pre-coated asphalt graded corundum 1.7kg / m 2 ~2.4kg / m 2 , preferably 2.0kg / m 2 And roll it until the surface is smooth.

[0119] Example 1

[0120] The present embodiment provides a multifunctional composite bridge deck longitudinal splicing structure, which includes, from bottom to top: a carbon fiber reinforced epoxy resin laminate 5, a polymer elastomer interface adhesive 1, a drainage and liquid-permeable polymer elastomer 4, an interlayer self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, an anti-cracking enhanced polymer elastomer 2, and a polyurethane anti-skid wear layer 6.

[0121] The construction method includes the following steps:

[0122] S1. Use a dust-free cutting machine to evenly cut on both sides of the joint to form a 50cm wide groove, and clean the groove to remove the floating slurry on the surface of the concrete cushion layer.

[0123] S2. Carbon fiber reinforced epoxy resin laminates 5 are laid with equal width on both sides above the joint and embedded into the old concrete beam with 16mm anchor bolts.

[0124] Among them, the carbon fiber reinforced epoxy resin laminate 5 has a thickness of 15 mm and a width of 20 cm. The mass fraction of carbon fiber in the carbon fiber reinforced epoxy resin laminate 5 accounts for 10% of the carbon fiber reinforced epoxy resin laminate. The carbon fiber and epoxy resin laminate 5 is laid in a unidirectional layered manner in a self-interlocking manner, with 100 layers laid. It is hot pressed between heated templates in a vulcanizer at 120°C for 17 hours and cured at 200°C for 2 hours. The thickness is 1.5 cm.

[0125] S3, apply polymer elastic interface adhesive 1 on the bottom of the slot, above the steel plate, and on both sides of the interface, with a coating amount of 0.6kg / m 2 .

[0126] Wherein, calculated by weight, the polymer elastic toughness interface adhesive 1 includes: 0.5 parts of multi-walled carbon nanotubes (MWCNTs), 40 parts of hyperbranched epoxy resin, and 60 parts of SBS modified asphalt;

[0127] The hyperbranched epoxy resin comprises: 10 parts of disodium ethylenediaminetetraacetate, 30 parts of polyester polyol, 60 parts of E51 epoxy resin, and 40 parts of a mixture of octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether;

[0128] SBS modified asphalt includes: 94 parts of 70# base asphalt, 6 parts of star-shaped styrene-butadiene-styrene block copolymer modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.2 parts of anti-yellowing agent and 0.2 parts of antioxidant.

[0129] S4. The lower layer is filled with 4 cm of drainage and liquid-permeable polymer elastomer with a loose paving coefficient of 1.2. After paving, it is compacted with a small roller.

[0130] Wherein, calculated by weight, the drainage and liquid-permeable polymer elastic toughness 4 comprises: 3 parts of two-component solvent-free high-temperature curing polyurethane, 3 parts of polymer elastic toughness binder, 100 parts of graded aggregate and 2 parts of composite fiber;

[0131] Two-component solvent-free high-temperature curing polyurethane, including: 85 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 20 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0132] High polymer elastic-tough binder, including: 100 parts of 90# asphalt, 21 parts of nano-grade desulfurized rubber powder, 6 parts of SBS modifier, 6 parts of rubber oil, 5 parts of organic bentonite, and 5 parts of compatibilizer H105;

[0133] For graded aggregate, 100% of the aggregate passes through a 13.2mm sieve, 90% of the aggregate passes through a 9.5mm sieve, 20% of the aggregate passes through a 4.75mm sieve, 15% of the aggregate passes through a 2.36mm sieve, 8% of the aggregate passes through a 0.6mm sieve, and 7% of the aggregate passes through a 0.075mm sieve;

[0134] Composite fiber, 60 parts of basalt fiber and 40 parts of glass fiber, with an average diameter of 4μm and an average length of 5mm.

[0135] S5, heated self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, the heating temperature is 180°C, and after pasting, it is flattened with a small roller.

[0136] Among them, calculated by weight, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 includes: 40-50 parts of hyperbranched epoxy resin, 45-60 parts of SBS modified asphalt, and 200 parts of polyester glass fiber cloth;

[0137] Hyperbranched epoxy resin, comprising: 12 parts of disodium ethylenediaminetetraacetate, 28 parts of polyester polyol, and 55 parts of E51 epoxy resin;

[0138] SBS modified asphalt includes: 96 parts of 70# base asphalt, 4 parts of SBS modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.2 parts of anti-yellowing agent, and 0.2 parts of antioxidant.

[0139] S6. Fill the top layer with 5cm of anti-crack reinforced polymer elastic toughness 2. Before filling, apply polymer elastic toughness interface adhesive to the upper surface of epoxy asphalt-based polyester glass fiber cloth and both sides of the notch. The coating amount is 0.6kg / m 2 .

[0140] Wherein, calculated by weight, the anti-crack enhanced polymer elastic toughness 2 comprises: 28 parts of polymer elastic toughness binder, 72 parts of single graded particle size aggregate and 0.3 parts of high-strength composite fiber;

[0141] The polymer elastic-tough binder comprises: 100 parts of 70# matrix asphalt, 20 parts of nano rubber powder, 6 parts of SBS modifier, 5 parts of rubber oil, 5 parts of organic bentonite and 5 parts of compatibilizer H105;

[0142] The single-size aggregate is composed of 16-19mm Yabang basalt, with a comprehensive cement-rock ratio of 28%;

[0143] High-strength composite fiber, including: 74 parts of boron fiber and 26 parts of high-strength lightweight glass fiber.

[0144] S7, a polyurethane anti-skid wear layer 6 is laid on the surface, and a small roller is used to roll it until the surface is smooth.

[0145] Among them, calculated by mass, it includes: 20 parts of two-component solvent-free high-temperature curing polyurethane, 1 part of SBS modified asphalt and 100 parts of graded aggregate;

[0146] Two-component solvent-free high-temperature curing polyurethane, including: 82 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 25 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0147] SBS modified asphalt includes: 92 parts of 70# base asphalt, 8 parts of SBS modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.2 parts of anti-yellowing agent, and 0.2 parts of antioxidant.

[0148] Among them, calculated by weight:

[0149] A polymer elastic-tough interface adhesive, comprising the following components: 0.5 parts of multi-walled carbon nanotubes, 40 parts of hyperbranched epoxy resin and 60 parts of SBS modified asphalt;

[0150] The hyperbranched epoxy resin comprises: 10 parts of disodium ethylenediaminetetraacetate, 30 parts of polyester polyol, 60 parts of E51 epoxy resin, and 40 parts of a mixture of octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether;

[0151] SBS modified asphalt includes: 94 parts of 70# base asphalt, 6 parts of star-shaped styrene-butadiene-styrene block copolymer modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.2 parts of anti-yellowing agent and 0.2 parts of antioxidant.

[0152] The spreading amount of two-component solvent-free high-temperature curing polyurethane adhesive layer is 0.45kg / m 2 The spreading amount of corundum pre-coated with 1% oil-stone ratio SBS modified asphalt is 1.9kg / m 2 .

[0153] Example 2

[0154] The present embodiment provides a multifunctional composite bridge deck longitudinal splicing structure, which includes, from bottom to top: a carbon fiber reinforced epoxy resin laminate 5, a polymer elastomer interface adhesive 1, a drainage and liquid-permeable polymer elastomer 4, an interlayer self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, an anti-cracking enhanced polymer elastomer 2, and a polyurethane anti-skid wear layer 6.

[0155] This embodiment also provides a construction method for a multifunctional composite bridge deck longitudinal splicing structure, comprising the following steps:

[0156] S1. Use a dust-free cutting machine to evenly cut on both sides of the joint to form a 50cm wide slot, and clean the slot to remove the floating slurry on the surface of the concrete cushion layer.

[0157] S2. Carbon fiber reinforced epoxy resin laminates 5 with a thickness of 12 mm and a width of 20 cm are laid on both sides of the joint with equal width, and are embedded into the old concrete beam with 16 mm anchor bolts.

[0158] Among them, in the carbon fiber reinforced epoxy resin laminate 5, the mass fraction of carbon fiber accounts for 10% of the carbon fiber reinforced epoxy resin laminate. The carbon fiber and epoxy resin laminate 5 is laid in a unidirectional layered manner in a self-interlocking manner, with 80 layers laid. It is hot pressed between the heated templates of the vulcanizer at 120°C for 17 hours, and cured at 200°C for 2 hours, with a thickness of 1.2 cm.

[0159] S3, apply polymer elastic interface adhesive 1 on the bottom of the slot, above the steel plate, and on both sides of the interface, with a coating amount of 0.7kg / m 2 .

[0160] Wherein, calculated by weight, the polymer elastic toughness interface adhesive includes: 0.3 parts of multi-walled carbon nanotubes (MWCNTs), 45 parts of hyperbranched epoxy resin, and 55 parts of SBS modified asphalt;

[0161] A hyperbranched epoxy resin, comprising: 12 parts of disodium ethylenediaminetetraacetate, 30 parts of polyester polyol, 55 parts of E51 epoxy resin, and 44 parts of a mixture of octadecylamine, hexadecylamine and oleylamine polyoxyethylene ether;

[0162] SBS modified asphalt includes: 94 parts of 70# base asphalt, 6 parts of SBS modifier, 0.3 parts of stabilizer, 0.5 parts of sulfur, 0.1 parts of anti-yellowing agent and 0.1 parts of antioxidant.

[0163] S4, the lower layer is filled with drainage and liquid-permeable polymer elastic toughness 4, with a loose paving coefficient of 1.2, and is compacted with a small roller after paving.

[0164] Among them, the drainage and liquid-permeable polymer elastic toughness 4 includes the following multiple components, including 2 parts of two-component solvent-free high-temperature curing polyurethane, 4 parts of polymer elastic toughness binder, 100 parts of graded aggregate, and 1 part of composite fiber, calculated by weight.

[0165] Two-component solvent-free high-temperature curing polyurethane, including: 80 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 20 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0166] The polymer elastic-tough binder comprises: 95 parts of 90# asphalt, 25 parts of nano-grade desulfurized rubber powder, 4 parts of SBS modifier, 46 parts of rubber oil, 5 parts of organic bentonite and 5 parts of compatibilizer H105.

[0167] Graded aggregates meet the following conditions: 100% by mass passing through a 13.2 mm sieve, 90% by mass passing through a 9.5 mm sieve, 20% by mass passing through a 4.75 mm sieve, 15% by mass passing through a 2.36 mm sieve, 8% by mass passing through a 0.6 mm sieve, and 7% by mass passing through a 0.075 mm sieve;

[0168] The composite fiber includes 60 parts of basalt fiber and 30 parts of glass fiber, with an average diameter of 2 μm and an average length of 4 mm.

[0169] S5, heated self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, the heating temperature is 180°C, and after pasting, it is flattened by a small roller;

[0170] Wherein, calculated by weight, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth comprises: 44 parts of hyperbranched epoxy resin, 56 parts of SBS modified asphalt and 200 parts of polyester glass fiber cloth;

[0171] The hyperbranched epoxy resin comprises: 14 parts of disodium ethylenediaminetetraacetate, 25 parts of polyester polyol and 60 parts of E51 epoxy resin.

[0172] SBS modified asphalt includes: 94 parts of 70# base asphalt, 6 parts of SBS modifier, 0.5 parts of stabilizer, 0.5 parts of sulfur, 0.1 parts of anti-yellowing agent and 0.1 parts of antioxidant.

[0173] S6. Fill the top layer with 5 cm of anti-crack reinforced polymer elastic toughness 2. Before filling, apply polymer elastic toughness interface adhesive 1 to the upper surface of epoxy asphalt-based polyester glass fiber cloth 3 and both sides of the notch. The coating amount is 0.7 kg / m 2 .

[0174] Wherein, calculated by weight, the anti-crack enhanced polymer elastic toughness 2 includes: 29 parts of polymer elastic toughness binder, 71 parts of single graded particle size aggregate and 0.1 parts of high-strength composite fiber;

[0175] High polymer elastic-tough binder, including: 100 parts of 70# base asphalt, 17 parts of nano rubber powder, 4 parts of SBS modifier, 6 parts of rubber oil, 8 parts of organic bentonite and 5 parts of compatibilizer H105;

[0176] The single-size aggregate is composed of 16-19mm Yabang basalt, with a comprehensive cement-stone ratio of 29%;

[0177] High-strength composite fiber, including: 70 parts of boron fiber and 30 parts of high-strength lightweight glass fiber.

[0178] S7, a polyurethane anti-skid wear layer 6 is laid on the surface, and a small roller is used to roll it until the surface is smooth.

[0179] Among them, two-component solvent-free high-temperature curing polyurethane 22 parts, SBS modified asphalt 0.9 parts, graded aggregate 100 parts;

[0180] Two-component solvent-free high-temperature curing polyurethane, including: 84 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 16 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0181] SBS modified asphalt includes 94 parts of 70# base asphalt, 6 parts of SBS modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.1 parts of anti-yellowing agent and 0.1 parts of antioxidant.

[0182] Among them, the spreading amount of two-component solvent-free high-temperature curing polyurethane adhesive layer is 0.5kg / m 2 The spreading amount of corundum pre-coated with 1% oil-stone ratio SBS modified asphalt is 2.1kg / m 2 .

[0183] Example 3

[0184] The present embodiment provides a multifunctional composite bridge deck longitudinal splicing structure, which includes, from bottom to top: a carbon fiber reinforced epoxy resin laminate 5, a polymer elastomer interface adhesive 1, a drainage and liquid-permeable polymer elastomer 4, an interlayer self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, an anti-cracking enhanced polymer elastomer 2, and a polyurethane anti-skid wear layer 6.

[0185] This embodiment also provides a construction method for a multifunctional composite bridge deck longitudinal splicing structure, comprising the following steps:

[0186] S1. Use a dust-free cutting machine to evenly cut on both sides of the joint to form a 50cm wide slot, and clean the slot to remove the floating slurry on the surface of the concrete cushion layer.

[0187] S2. Carbon fiber reinforced epoxy resin laminates 5 with a thickness of 15 mm and a width of 20 cm are laid on both sides of the joint with equal width, and are embedded into the old concrete beam with 16 mm anchor bolts.

[0188] Among them, the mass fraction of carbon fiber in the carbon fiber reinforced epoxy resin laminate 5 accounts for 10% of the carbon fiber reinforced epoxy resin laminate. The carbon fiber and epoxy resin laminate 5 is laid in a unidirectional layered manner in a self-interlocking manner, with 100 layers laid, hot pressed between the heated templates of the vulcanizer at 120°C for 17 hours, and cured at 200°C for 2 hours, with a thickness of 1.5 cm.

[0189] S3. Apply polymer elastic interface adhesive 1 on the bottom of the groove, above the steel plate, and on the interfaces on both sides, with a coating amount of 0.7kg / ㎡.

[0190] Wherein, calculated by weight, the polymer elastic toughness interface adhesive 1 comprises: 0.7 parts of multi-walled carbon nanotubes (MWCNTs), 48 parts of hyperbranched epoxy resin and 52 parts of SBS modified asphalt;

[0191] A hyperbranched epoxy resin, comprising: 15 parts of disodium ethylenediaminetetraacetate, 33 parts of polyester polyol, 52 parts of E51 epoxy resin, and 45 parts of a mixture of octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether;

[0192] SBS modified asphalt includes: 94 parts of 70# base asphalt, 5 parts of star-shaped styrene-butadiene-styrene block copolymer SBS modifier, 0.2 parts of stabilizer, 0.8 parts of sulfur, 0.3 parts of anti-yellowing agent and 0.3 parts of antioxidant.

[0193] S4, the lower layer is filled with drainage and liquid-permeable polymer elastic toughness 4, with a loose paving coefficient of 1.2, and is compacted with a small roller after paving.

[0194] Among them, calculated by weight, the drainage and liquid-permeable polymer elastic toughness 4 includes: 3 parts of two-component solvent-free high-temperature curing polyurethane, 5 parts of polymer elastic toughness binder, 100 parts of graded aggregate, and 3 parts of composite fiber;

[0195] Two-component solvent-free high-temperature curing polyurethane, comprising: 82 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 18 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0196] High polymer elastic-tough binder, including: 94 parts of 90# asphalt, 26 parts of nano-grade desulfurized rubber powder, 6 parts of SBS modifier, 45 parts of rubber oil, 6 parts of organic bentonite and 5 parts of compatibilizer H105;

[0197] For graded aggregate, 100% of the aggregate passes through a 13.2mm sieve, 90% of the aggregate passes through a 9.5mm sieve, 20% of the aggregate passes through a 4.75mm sieve, 15% of the aggregate passes through a 2.36mm sieve, 8% of the aggregate passes through a 0.6mm sieve, and 7% of the aggregate passes through a 0.075mm sieve;

[0198] The composite fiber includes: 55 parts of basalt fiber and 45 parts of glass fiber, with an average diameter of 5 μm and an average length of 46 mm.

[0199] S5, heated self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3, the heating temperature is 180°C, and after pasting, it is flattened with a small roller.

[0200] Among them, calculated by weight, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth 3 includes: 46 parts of hyperbranched epoxy resin, 54 parts of SBS modified asphalt, and 200 parts of polyester glass fiber cloth;

[0201] A hyperbranched epoxy resin comprising: 18 parts of disodium ethylenediaminetetraacetate, 22 parts of polyester polyol and 58 parts of E51 epoxy resin;

[0202] SBS modified asphalt includes: 95 parts of 70# base asphalt, 5 parts of SBS modifier, 1 part of stabilizer, 0.5 parts of sulfur, 0.2 parts of anti-yellowing agent and 0.3 parts of antioxidant.

[0203] S6. Fill the top layer with 5 cm of anti-crack reinforced polymer elastic toughness 2. Before filling, apply polymer elastic toughness interface adhesive 1 to the upper surface of epoxy asphalt-based polyester glass fiber cloth 3 and both sides of the notch. The coating amount is 0.7 kg / m 2 .

[0204] Wherein, calculated by weight, the anti-crack enhanced polymer elastic toughness 2 includes: 29 parts of polymer elastic toughness binder, 71 parts of single graded particle size aggregate and 0.1 parts of high-strength composite fiber;

[0205] High polymer elastic-tough binder, including: 100 parts of 70# base asphalt, 17 parts of nano rubber powder, 4 parts of SBS modifier, 6 parts of rubber oil, 8 parts of organic bentonite and 5 parts of compatibilizer H105;

[0206] The single-size aggregate is composed of 16-19mm Yabang basalt, with a comprehensive cement-stone ratio of 29%;

[0207] High-strength composite fiber, including: 70 parts of boron fiber and 30 parts of high-strength lightweight glass fiber.

[0208] S7, a polyurethane anti-skid wear layer 6 is laid on the surface, and a small roller is used to roll it until the surface is smooth.

[0209] Among them, calculated by weight, it includes: 22 parts of two-component solvent-free high-temperature curing polyurethane, 0.9 parts of SBS modified asphalt and 100 parts of graded aggregate;

[0210] Two-component solvent-free high-temperature curing polyurethane, including: 84 parts of component A composed of oligomer polyether polyol and aromatic isocyanate, and 16 parts of component B composed of diethyltoluenediamine, anti-yellowing agent and antioxidant;

[0211] SBS modified asphalt, including: 94 parts of 70# base asphalt, 6 parts of SBS modifier, 0.5 parts of stabilizer, 1 part of sulfur, 0.1 parts of anti-yellowing agent and 0.1 parts of antioxidant;

[0212] The spreading amount of two-component solvent-free high-temperature curing polyurethane adhesive layer is 0.6kg / m 2 The spreading amount of corundum pre-coated with 1% oil-stone ratio SBS modified asphalt is 1.7kg / m 2 .

[0213] Comparative Example 1

[0214] This comparative example is basically the same as Example 1, except that the SBS modified asphalt binder in the lower layer of drainage and liquid-permeable asphalt mixture and the upper layer of anti-cracking enhanced polymer elastomer in Comparative Example 1 is replaced with Trinidad Lake asphalt.

[0215] Comparative Example 2

[0216] This comparative example is basically the same as Example 2, except that the upper layer of the crack-resistant reinforced polymer elastomer in Comparative Example 2 uses basalt aggregate with a single particle size of 9.6 to 16 mm.

[0217] Comparative Example 3

[0218] This comparative example is basically the same as Example 3, except that in Comparative Example 3, no self-adhesive polyester glass fiber cloth is laid between the layers, and asphalt anti-cracking tape is used instead.

[0219] Comparative Example 4

[0220] Basically the same as Example 1, the hyperbranched epoxy resin in the polymer elastic-tough interface adhesive and the self-adhesive epoxy asphalt polyester glass fiber cloth is replaced by E44 epoxy resin.

[0221] Comparative Example 5

[0222] The method is basically the same as Example 1, but instead of using the drainage and liquid-permeable polymer elastomer, ordinary SMA asphalt mixture is used.

[0223] Comparative Example 6

[0224] The method is basically the same as Example 1, but instead of using two-component polyurethane in the drainage and liquid-permeable polymer elastomer and the polyurethane anti-slip wear layer, single-component polyurethane SJ-380 is used.

[0225] Comparative Example 7

[0226] It is basically the same as Example 1, but instead of using carbon fiber reinforced epoxy resin laminate, a Q345 steel plate with a thickness of 5 mm is used, and the same size and anchoring method are adopted.

[0227] Performance Testing

[0228] The splicing structures provided in Examples 1 to 3 and Comparative Examples 1 to 3 were tested for relevant performance indicators according to T0719-2011 in accordance with the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering"; and the deformation that the structure can adapt to was tested with reference to the Texas mask test invented by the Texas Transportation Science Institute (TTI) in the United States. The test data were recorded in Tables 1 to 3.

[0229] Table 1 Performance indexes of drainage and liquid-permeable polymer elastomers in various embodiments

[0230]

[0231]

[0232] Table 2 Performance indexes of crack-resistant enhanced polymer elastic toughness in various examples

[0233]

[0234] Table 3 Performance indicators of various pavement structures

[0235]

[0236] According to the comparative analysis between Comparative Example 1 and Example 1, it can be seen that:

[0237] The dynamic stability and failure strain of Example 1 are significantly higher than those of Comparative Example 1, while maintaining good waterproof performance. This is because the three-dimensional network structure formed by SBS in asphalt significantly enhances the elasticity and deformation resistance of the material, reduces the temperature sensitivity of asphalt, and enables the material to maintain good performance under various temperature conditions. Its molecular structure forms a microscopic phase separation structure in asphalt, which not only maintains the adhesion of asphalt, but also improves elasticity.

[0238] According to the comparative analysis between Comparative Example 2 and Example 2, it can be seen that:

[0239] The dynamic stability, failure strain and deformation of Example 2 are slightly higher than those of Comparative Example 2, but the difference is not particularly significant. This is because the larger particle size of 16-19 mm aggregate forms a more stable skeleton structure, slightly improving the overall stiffness and deformation resistance. The larger particle size may slightly increase the void ratio of the mixture, better disperse the load, and help improve the anti-rutting performance and reduce stress concentration.

[0240] According to the comparative analysis between Comparative Example 3 and Example 3, it can be seen that:

[0241] Example 3 is much better than Comparative Example 3 in terms of dynamic stability, failure strain, deformation and waterproof performance. This is because the self-adhesive polyester glass fiber cloth provides better interlayer bonding, reducing the risk of interface slip and delamination. The grid structure of the glass fiber cloth can more effectively disperse stress and prevent crack propagation. The multi-directional fiber provides all-round tensile strength enhancement. The polyester and epoxy resin modification improves the compatibility with the asphalt layer.

[0242] Table 4. Performance indexes of water-draining and liquid-permeable polymer elastomers of Examples 1 to 3 and Comparative Examples 4 to 7

[0243]

[0244] Table 5. Performance indexes of crack-resistant enhanced polymer elastic toughness of Examples 1 to 3 and Comparative Examples 4 to 7

[0245]

[0246]

[0247] Table 6. Performance indicators of the pavement structures of Examples 1 to 3 and Comparative Examples 4 to 7

[0248]

[0249] According to the comparative analysis between Comparative Example 4 and Example 1, it can be seen that:

[0250] (1) The dynamic stability of the drainage and liquid-permeable polymer elastomer of Comparative Example 4 decreased by 5.3%, and the failure strain decreased by 4.5%, which indicates that the hyperbranched epoxy resin can enhance the mechanical properties of the material through its dense cross-linked network.

[0251] (2) Compared with Example 1, the dynamic stability of the crack-resistant enhanced polymer elastomer of Comparative Example 4 decreased by 9.1%, and the failure strain decreased by 21.7%, which indicates that in the application of the crack-resistant enhanced polymer elastomer provided by the present invention, the highly branched structure of the hyperbranched epoxy resin more effectively disperses stress and helps improve the crack resistance.

[0252] (3) Compared with Example 1, the dynamic stability of the overall pavement structure of Comparative Example 4 decreased by 17.5%, and the failure strain decreased by 24.1%. In the overall structure, the network structure of the hyperbranched epoxy resin formed a stronger interface bond with other components, thereby improving the overall performance.

[0253] By comparing Comparative Example 5 with Example 1, it can be seen that:

[0254] (1) Compared with Example 5, the water permeability coefficient of the polymer elastomer of Comparative Example 1 decreased by 73%, while the dynamic stability decreased by 15.7%, which indicates that the water-permeable polymer elastomer is the key to achieving the water-permeable function and also has an important contribution to the mechanical properties.

[0255] (2) Compared with Example 5, the failure strain of the crack-resistant enhanced polymer elastomer of Example 1 decreased by 30%, and the deformation decreased by 24.9%, which indicates that the porous structure of the drainage and liquid-permeable polymer elastomer helps to absorb and disperse stress and improve the crack resistance of the material.

[0256] (3) Compared with Example 5, all indicators of the pavement structure of Comparative Example 1 decreased significantly, indicating that the drainage and liquid-permeable polymer elastomer plays a key role in the overall structure and may provide a balance between mechanical properties and functionality through its unique structure.

[0257] According to the comparison between Comparative Example 6 and Example 1, it can be seen that the two-component polyurethane is not used in the drainage and liquid-permeable polymer elastic toughness and the polyurethane anti-slip wear layer, but a single-component polyurethane is used instead:

[0258] (1) The various indicators of the drainage and permeable polymer elastomer decreased slightly, indicating that the two-component polyurethane plays an auxiliary role in providing elasticity and adhesion.

[0259] (2) Crack-resistant polymer elastomer: The failure strain decreased by 13.9%, indicating that the elastic properties of polyurethane can provide additional shear resistance to enhance crack resistance.

[0260] (3) In comparison between Example 1 and Comparative Example 6, the deformation of the pavement structure decreased by 16.8% and the shear strength decreased by 11.6%, reflecting the importance of polyurethane in providing structural elasticity and interface bonding.

[0261] Comparison of Comparative Example 7 with Example 1 shows that:

[0262] (1) The failure strain of the crack-resistant polymer elastomer decreased by 5.6%, indicating that carbon fiber composites enhance crack resistance by providing additional structural support.

[0263] (2) The dynamic stability of the pavement structure decreased by 9.9% and the failure strain decreased by 13.4%, reflecting the role of carbon fiber composites in enhancing the overall structural strength and stability, especially when subjected to large strains.

[0264] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been shown as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multifunctional composite bridge deck longitudinal splicing structure, characterized in that: The splicing structure includes, from top to bottom: A polyurethane anti-skid wear layer laid on the surface functional layer; The crack-resistant reinforced polymer elastomer laid on the upper layer; Self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth; The drainage and liquid-permeable polymer elastomer laid on the lower layer; Carbon fiber reinforced epoxy resin laminate; The splicing structure is arranged in the notch formed by reverse excavation of the original bridge deck asphalt pavement; The bottom of the notch and the positions on both sides that contact the splicing structure are coated with a high molecular elastic interface adhesive.

2. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1, characterized in that: The polymer elastic-flexible interface adhesive comprises the following components calculated by weight: 0.3-0.8 parts of multi-walled carbon nanotubes, 35-45 parts of hyperbranched epoxy resin and 55-65 parts of SBS modified asphalt.

3. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1 is characterized in that: The carbon fiber reinforced epoxy resin laminate comprises a carbon fiber and epoxy resin laminate; The carbon fiber accounts for 5-15% of the total mass of the carbon fiber reinforced epoxy resin laminate.

4. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1, characterized in that: Calculated by weight, the drainage and liquid-permeable polymer elastomer includes the following components: 2 to 3 parts of two-component solvent-free high-temperature curing polyurethane, 3 to 4 parts of polymer elastomer binder, 90 to 110 parts of graded aggregate and 1 to 3 parts of composite fiber.

5. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1 is characterized in that: Calculated by weight, the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth includes the following components: 40-50 parts of hyperbranched epoxy resin, 45-60 parts of SBS modified asphalt and 185-215 parts of polyester glass fiber cloth.

6. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1, characterized in that: The anti-crack enhanced polymer elastomer comprises the following components calculated by weight: 26~30 parts of polymer elastic-ductile binder, 70~74 parts of single-graded particle size aggregate and 0.2~0.4 parts of high-strength composite fiber.

7. The multifunctional composite bridge deck longitudinal splicing structure according to claim 1 is characterized in that: The polyurethane anti-skid wear layer comprises the following components in parts by weight: 20-25 parts of two-component solvent-free high-temperature curing polyurethane, 0.7-1.3 parts of SBS modified asphalt and 90-110 parts of graded aggregate.

8. The multifunctional composite bridge deck longitudinal splicing structure according to claim 2 or 5, characterized in that: The hyperbranched epoxy resin is prepared from the following components in parts by weight: 7-12 parts of disodium ethylenediaminetetraacetate, 28-33 parts of polyester polyol, 55-65 parts of E51 epoxy resin, and 40-45 parts of a mixture of long-chain fatty amine derivatives such as octadecylamine, hexadecylamine, and oleylamine polyoxyethylene ether; The long-chain fatty amine derivatives are 4 to 10 parts of octadecylamine, 15 to 20 parts of hexadecylamine and 0.6 to 2.5 parts of oleylamine polyoxyethylene ether.

9. A multifunctional composite bridge deck longitudinal splicing structure according to any one of claims 2, 3 or 5, characterized in that: Calculated by weight, the SBS modified asphalt includes the following components: 92~96 parts of 70# base asphalt, 4~8 parts of SBS modifier, 0.3~1 parts of stabilizer, 0.5~2 parts of sulfur, 0.1~0.3 parts of anti-yellowing agent and 0.1~0.3 parts of antioxidant.

10. A construction method for a multifunctional composite bridge deck longitudinal splicing structure according to any one of claims 1 to 9, characterized in that: The steps include: S1. According to the design position, at the joint of the new and old bridges, the original bridge deck asphalt concrete is reversely excavated along the joint to form a notch, and the notch is cleaned to remove the surface concrete slurry to ensure the notch is clean; S2. Fill the joint with expansion foam strips, symmetrically arrange carbon fiber reinforced epoxy resin laminates along the edges of both sides of the joint, and fix them to the old concrete beams with spiral bolts; S3. Apply polymer elastic interface adhesive along the bottom of the groove, with a coating thickness of not less than 4mm; S4. Mix two-component solvent-free high-temperature curing polyurethane, add SBS modified asphalt after mixing evenly, mix with the graded aggregate and composite fiber used in the lower layer to form a drainage and liquid-permeable polymer elastic body, and pave it at the bottom of the groove with a paving thickness of 4~6cm; S5, heating the self-adhesive hyperbranched toughened epoxy asphalt polyester glass fiber cloth at 110-130° C. for 2-3 minutes, and laying it on the upper surface of the drainage and liquid-permeable polymer elastic toughness; S6. Apply polymer elastic toughness interface adhesive with a coating thickness of 2-4 mm, mix anti-cracking enhanced polymer elastic toughness, and lay a thickness of 1.5-2.5 cm. Apply polymer elastic toughness interface adhesive again with a coating thickness of 2-4 mm, and lay a thickness of 1.5-2.5 cm of anti-cracking enhanced polymer elastic toughness. When the temperature reaches 90-100°C, use polymer elastic toughness binder for surface sealing with a surface sealing thickness of 0.2-0.3 cm. S7. When the surface seal layer cools down to below 50℃, mix the two-component solvent-free high-temperature curing polyurethane, mix evenly, and apply it on the surface seal layer after stirring evenly. Use a tack layer gravel synchronous spreader to spread it. The tack layer spreading amount is 0.4kg / m 2 ~0.5kg / m 2 , spread pre-coated asphalt graded corundum 1.7kg / m 2 ~2.4kg / m 2 , and roll it until the surface is flat.

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