Bridge waterproof material and preparation method thereof

Abstract

The application relates to a bridge deck waterproof material and a preparation method thereof, which is prepared from the following raw materials in parts by weight: 15-22 parts of fluorosilicon type thermoplastic polyurethane elastomer, 65-72 parts of asphalt, 3-5 parts of cellulose nanocrystals, 5-8 parts of 2-naphthylamine-4,8-disulfonic acid, 0.8-1.5 parts of diaphosphorus pentoxide, 0.5-0.8 parts of polyphosphoric acid, 4-6 parts of vinyl hydroxyl silicone oil, 3-5 parts of SBR rubber powder, 1-2 parts of a coupling agent, 5-8 parts of reinforcing material, 1-3 parts of 1,3,5-triglycidyl-S-triazinetrione, 1-2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene)diacrylate, 3-5 parts of a plasticizer, 1-3 parts of an anti-aging agent, and 0.1-0.3 parts of an initiator. The bridge deck waterproof material has the advantages of large bonding strength, good low-temperature crack resistance, high-temperature resistance and aging resistance, excellent waterproof performance and long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of waterproof materials, and in particular to a bridge deck waterproof material and a preparation method thereof. Background Art

[0002] As a vital transportation hub, bridge deck waterproofing is crucial. Bridge decks are exposed to the elements for extended periods, subject to erosion from rainwater, snowmelt, and other factors. If waterproofing measures are inadequate, moisture can penetrate the concrete, leading to corrosion of the steel reinforcement and reducing the durability and safety of the bridge structure. To address this issue, a common practice is to lay a waterproof layer on the bridge deck. This layer is typically made from specialized bridge deck waterproofing materials, and its performance directly impacts the effectiveness of the waterproofing, making it crucial for improving bridge safety, durability, and extending its service life.

[0003] Currently, bridge deck waterproofing materials mainly include epoxy asphalt and hot-melt rubber asphalt. However, although epoxy asphalt has excellent bonding properties and impermeability, its construction temperature is high (usually above 150°C), which can easily lead to construction damage and environmental pollution, and it also consumes a lot of energy. Although hot-melt rubber asphalt is relatively low-cost and has good flexibility, it suffers from problems such as high-temperature softening and deformation (softening point ≤ 60°C), low-temperature brittle cracking, and insufficient crack resistance. Its bonding strength is only 1 / 3 of that of epoxy asphalt, which cannot meet the needs of heavy-load traffic. In addition, other types of bridge deck waterproofing materials on the market also have more or less technical defects such as unsatisfactory anti-breakage ability, insufficient waterproof performance, crack resistance and anti-aging performance, high-temperature resistance that still needs to be further improved, and short service life.

[0004] To address the above-mentioned issues, Chinese invention patent CN112646546B discloses a bridge deck waterproofing material composed of the following components by weight: 10-20 parts polyurethane with a vinyl ether end group, 60-70 parts asphalt, 5-8 parts 2,4-diamino-6-diallylamino-1,3,5-triazine, 3-5 parts p-toluenesulfonic acid, 15-25 parts carboxyl-terminated SBS, and 5-10 parts of a functional copolymer prepared by copolymerization of allyl pentafluorobenzene, vinyl triethoxysilane, 1-allyl-3-methylimidazole chloride, and allyl glycidyl ether. The invention also provides a method for preparing the bridge deck waterproofing material. The disclosed bridge deck waterproofing material exhibits significant waterproofing effectiveness, excellent overall performance, high bonding strength, high temperature resistance, aging resistance, and performance stability, and a long service life. However, its low-temperature resistance and crack resistance still require further improvement.

[0005] It can be seen that the development of a bridge deck waterproof material with high bonding strength, good low-temperature and crack resistance, good high-temperature resistance and aging resistance, excellent waterproof performance and long service life and its preparation method meet market demand, have broad market value and application prospects, and are of great significance to promoting the development of the bridge deck material field. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a bridge deck waterproof material and its preparation method with high bonding strength, good low temperature crack resistance, high temperature resistance and aging resistance, excellent waterproof performance and long service life.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a bridge deck waterproof material, which is made of the following raw materials in parts by weight: 15-22 parts of fluorosilicone thermoplastic polyurethane elastomer, 65-72 parts of asphalt, 3-5 parts of cellulose nanocrystals, 5-8 parts of 2-naphthylamine-4,8-disulfonic acid, 0.8-1.5 parts of phosphorus pentoxide, 0.5-0.8 parts of polyphosphoric acid, 4-6 parts of vinyl hydroxy silicone oil, 3-5 parts of SBR rubber powder, 1-2 parts of coupling agent, 5-8 parts of reinforcing material, 1-3 parts of 1,3,5-triglycidyl-S-triazinetrione, 1-2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 3-5 parts of plasticizer, 1-3 parts of anti-aging agent, and 0.1-0.3 parts of initiator.

[0008] Furthermore, there is no special requirement for the source of the fluorosilicone thermoplastic polyurethane elastomer. In one embodiment of the present invention, the fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B.

[0009] Preferably, the asphalt is at least one of ordinary heavy traffic 70# asphalt, ordinary heavy traffic 90# asphalt, and 110# road asphalt.

[0010] Preferably, the cellulose nanocrystals have a length of 100-500 nm and a diameter of 20-100 nm, and are provided by Beijing Naxun Technology Co., Ltd.

[0011] Preferably, the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5 mol%, a vinyl content of 6±0.5 mol%, and a viscosity of ≤33 mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.

[0012] Preferably, the particle size of the SBR rubber powder is 20 mesh and is provided by Jinan Bitu Chemical.

[0013] Preferably, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

[0014] Preferably, the reinforcing material is a mixture of nano-boron fiber, wollastonite and fly ash in a mass ratio of 1:(0.8-1.2):(1-3).

[0015] Preferably, the diameter of the nano-boron fiber is 300-500 nm, and the aspect ratio is (15-20):1; the particle size of the wollastonite is 500-800 mesh; and the particle size of the fly ash is 400-600 mesh.

[0016] Preferably, the plasticizer is epoxidized soybean oil; the antioxidant is at least one of antioxidant RD and antioxidant 4020; and the initiator is dicumyl peroxide.

[0017] Another object of the present invention is to provide a method for preparing the bridge deck waterproof material, comprising the following steps: heating asphalt to 170-180°C, adding fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 900-1500 r / min for 1-3 hours, then adding cellulose nanocrystals, coupling agent, reinforcing material, plasticizer, anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil and initiator in sequence, continuing stirring for 1-2 hours, and starting the colloid mill for 1-2 hours to obtain the bridge deck waterproof material.

[0018] Due to the application of the above technical solution, the present invention has the following beneficial effects:

[0019] (1) The preparation method of the bridge deck waterproof material disclosed in the present invention has a simple process, convenient operation and control, high preparation efficiency and finished product qualification rate, strong equipment versatility, greatly reduces equipment investment and maintenance costs, is easy to large-scale industrial production, and has high promotion and application value.

[0020] (2) The bridge deck waterproof material disclosed in the present invention is made of the following raw materials in parts by weight: 15-22 parts of fluorosilicone thermoplastic polyurethane elastomer, 65-72 parts of asphalt, 3-5 parts of cellulose nanocrystals, 5-8 parts of 2-naphthylamine-4,8-disulfonic acid, 0.8-1.5 parts of phosphorus pentoxide, 0.5-0.8 parts of polyphosphoric acid, 4-6 parts of vinyl hydroxy silicone oil, 3-5 parts of SBR rubber powder, 1-2 parts of coupling agent, 5-8 parts of reinforcing material, 1-3 parts of 1,3,5-triglycidyl-S-triazinetrione, 1-2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 3-5 parts of plasticizer, 1-3 parts of anti-aging agent, and 0.1-0.3 parts of initiator. The coordinated interaction of the various raw materials results in a bridge deck waterproofing material with high bonding strength, excellent low-temperature crack resistance, high-temperature resistance, and aging resistance, resulting in superior waterproofing and a long service life. This is the first time that asphalt has been modified simultaneously with a fluorosilicone thermoplastic polyurethane elastomer, vinyl hydroxy silicone oil, SBR rubber powder, and reinforcing materials, significantly improving the asphalt's high-temperature stability, low-temperature crack resistance, and fatigue resistance. It also enhances the asphalt's adhesion, further improving its water resistance, chemical resistance, and aging resistance.

[0021] (3) The bridge deck waterproof material disclosed in the present invention introduces cellulose nanocrystals and uses a mixture of nano-boron fiber, wollastonite and fly ash in a mass ratio of 1:(0.8-1.2):(1-3) as a reinforcing material, which can significantly improve the crack resistance and impermeability, thereby improving the waterproof effect; the sulfonic acid group on 2-naphthylamine-4,8-disulfonic acid can not only promote the grafting reaction of raw materials containing vinyl functional groups with asphalt (cations under acidic conditions), so that these raw materials are connected to asphalt in the form of chemical bonds, but also, under the catalytic action of phosphorus pentoxide and polyphosphoric acid, the sulfonic acid group can also react chemically with raw materials containing benzene rings; the amino group on 2-naphthylamine-4,8-disulfonic acid can also react with 1,3,5-triglycidyl The epoxy groups on the oil-S-triazinetrione undergo a chemical reaction, and multiple interpenetrating network types are simultaneously introduced into the bridge deck material, which can effectively improve the comprehensive performance and performance stability of the bridge deck material, so that the bridge deck material has high bonding strength, good low-temperature crack resistance, high-temperature resistance and aging resistance, excellent waterproof performance, and long service life; (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, vinyl hydroxy silicone oil and 1,3,5-triglycidyl-S-triazinetrione introduce fluorine-containing structures, siloxane structures and triazone structures respectively. Under the multiple effects of electronic effects, steric effects and conjugated effects, they make the bridge deck material with better anti-aging and waterproof properties and longer service life.

[0022] (4) The bridge deck waterproof material disclosed in the present invention can effectively improve the construction performance of the material through the reasonable selection of composition formula and preparation process parameters, so that it has high bonding strength, good low-temperature resistance and crack resistance, good high-temperature resistance and anti-aging performance, excellent waterproof performance and long service life. DETAILED DESCRIPTION

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0024] Example 1, a bridge deck waterproof material is made of the following raw materials in parts by weight: 15 parts of fluorosilicone thermoplastic polyurethane elastomer, 65 parts of asphalt, 3 parts of cellulose nanocrystals, 5 parts of 2-naphthylamine-4,8-disulfonic acid, 0.8 parts of phosphorus pentoxide, 0.5 parts of polyphosphoric acid, 4 parts of vinyl hydroxy silicone oil, 3 parts of SBR rubber powder, 1 part of coupling agent, 5 parts of reinforcing material, 1 part of 1,3,5-triglycidyl-S-triazinetrione, 1 part of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 3 parts of plasticizer, 1 part of anti-aging agent, and 0.1 part of initiator.

[0025] The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the asphalt is ordinary heavy traffic 70# asphalt; the cellulose nanocrystals have a length of 100-500nm and a diameter of 20-100nm, and are provided by Beijing Naxun Technology Co., Ltd.; the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5mol%, a vinyl content of 6±0.5mol%, and a viscosity of ≤33mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; the particle size of the SBR rubber powder is 20 mesh, provided by Jinan Bitu Chemical; the coupling agent is silane coupling agent KH550; the reinforcing material is a mixture of nano-boron fiber, wollastonite, and fly ash in a mass ratio of 1:0.8:1; the diameter of the nano-boron fiber is 300nm, and the aspect ratio is 15:1; the particle size of the wollastonite is 500 mesh; the particle size of the fly ash is 400 mesh; the plasticizer is epoxidized soybean oil; the anti-aging agent is antioxidant RD; and the initiator is diisopropylbenzene peroxide.

[0026] A method for preparing the bridge deck waterproof material comprises the following steps: heating asphalt to 170° C., adding a fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 900 r / min for 1 hour, then sequentially adding cellulose nanocrystals, a coupling agent, a reinforcing material, a plasticizer, an anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil, and an initiator, continuing stirring for 1 hour, and starting a colloid mill for 1 hour to obtain the bridge deck waterproof material.

[0027] Example 2, a bridge deck waterproof material, is made of the following raw materials in parts by weight: 17 parts of fluorosilicone thermoplastic polyurethane elastomer, 67 parts of asphalt, 3.5 parts of cellulose nanocrystals, 6 parts of 2-naphthylamine-4,8-disulfonic acid, 1 part of phosphorus pentoxide, 0.6 part of polyphosphoric acid, 4.5 parts of vinyl hydroxy silicone oil, 3.5 parts of SBR rubber powder, 1.2 parts of coupling agent, 6 parts of reinforcing material, 1.5 parts of 1,3,5-triglycidyl-S-triazinetrione, 1.2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 3.5 parts of plasticizer, 1.5 parts of anti-aging agent, and 0.15 parts of initiator.

[0028] The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the asphalt is ordinary heavy traffic 70# asphalt; the cellulose nanocrystals have a length of 100-500nm and a diameter of 20-100nm, and are provided by Beijing Naxun Technology Co., Ltd.; the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5mol%, a vinyl content of 6±0.5mol%, and a viscosity of ≤33mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; the particle size of the SBR rubber powder is 20 mesh, provided by Jinan Bitu Chemical; the coupling agent is silane coupling agent KH560; the reinforcing material is a mixture of nano-boron fiber, wollastonite, and fly ash in a mass ratio of 1:0.9:1.5; the diameter of the nano-boron fiber is 350nm, and the aspect ratio is 17:1; the particle size of the wollastonite is 600 mesh; the particle size of the fly ash is 450 mesh; the plasticizer is epoxidized soybean oil; the anti-aging agent is antioxidant 4020; and the initiator is diisopropylbenzene peroxide.

[0029] A method for preparing the bridge deck waterproof material comprises the following steps: heating asphalt to 173° C., adding a fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 1100 r / min for 1.5 hours, then sequentially adding cellulose nanocrystals, a coupling agent, a reinforcing material, a plasticizer, an anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil, and an initiator, continuing stirring for 1.3 hours, and starting a colloid mill for 1.3 hours to obtain the bridge deck waterproof material.

[0030] Example 3, a bridge deck waterproof material, is made of the following raw materials in parts by weight: 19 parts of fluorosilicone thermoplastic polyurethane elastomer, 69 parts of asphalt, 4 parts of cellulose nanocrystals, 6.5 parts of 2-naphthylamine-4,8-disulfonic acid, 1.2 parts of phosphorus pentoxide, 0.65 parts of polyphosphoric acid, 5 parts of vinyl hydroxy silicone oil, 4 parts of SBR rubber powder, 1.5 parts of coupling agent, 6.5 parts of reinforcing material, 2 parts of 1,3,5-triglycidyl-S-triazinetrione, 1.5 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 4 parts of plasticizer, 2 parts of anti-aging agent, and 0.2 parts of initiator.

[0031] The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the asphalt is ordinary heavy traffic 70# asphalt; the cellulose nanocrystals have a length of 100-500nm and a diameter of 20-100nm, and are provided by Beijing Naxun Technology Co., Ltd.; the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5mol%, a vinyl content of 6±0.5mol%, and a viscosity of ≤33mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; the particle size of the SBR rubber powder is 20 mesh, provided by Jinan Bitu Chemical; the coupling agent is silane coupling agent KH570; the reinforcing material is a mixture of nano-boron fiber, wollastonite, and fly ash in a mass ratio of 1:1:2; the diameter of the nano-boron fiber is 400nm, and the aspect ratio is 18:1; the particle size of the wollastonite is 650 mesh; the particle size of the fly ash is 500 mesh; the plasticizer is epoxidized soybean oil; the anti-aging agent is antioxidant RD; and the initiator is diisopropylbenzene peroxide.

[0032] A method for preparing the bridge deck waterproof material comprises the following steps: heating asphalt to 175° C., adding a fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 1300 r / min for 2 hours, then sequentially adding cellulose nanocrystals, a coupling agent, a reinforcing material, a plasticizer, an anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil, and an initiator, continuing stirring for 1.5 hours, and starting a colloid mill for 1.5 hours to obtain the bridge deck waterproof material.

[0033] Example 4, a bridge deck waterproof material, is made of the following raw materials in parts by weight: 21 parts of fluorosilicone thermoplastic polyurethane elastomer, 70 parts of asphalt, 4.5 parts of cellulose nanocrystals, 7.5 parts of 2-naphthylamine-4,8-disulfonic acid, 1.4 parts of phosphorus pentoxide, 0.75 parts of polyphosphoric acid, 5.5 parts of vinyl hydroxy silicone oil, 4.5 parts of SBR rubber powder, 1.8 parts of coupling agent, 7.5 parts of reinforcing material, 2.5 parts of 1,3,5-triglycidyl-S-triazinetrione, 1.8 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 4.5 parts of plasticizer, 2.5 parts of anti-aging agent, and 0.25 parts of initiator.

[0034] The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the asphalt is ordinary heavy traffic 70# asphalt; the cellulose nanocrystals have a length of 100-500nm and a diameter of 20-100nm, and are provided by Beijing Naxun Technology Co., Ltd.; the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5mol%, a vinyl content of 6±0.5mol%, and a viscosity of ≤33mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; the particle size of the SBR rubber powder is 20 mesh, provided by Jinan Bitu Chemical; the coupling agent is a mixture of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570 in a mass ratio of 1:2:3; the reinforcing material is a mixture of nano-boron fiber, wollastonite, and fly ash in a mass ratio of 1:1.1:2.5; the diameter of the nano-boron fiber is 450nm, and the aspect ratio is 19:1; the particle size of the wollastonite is 750 mesh; the particle size of the fly ash is 550 mesh; the plasticizer is epoxidized soybean oil; the anti-aging agent is a mixture of antioxidant RD and antioxidant 4020 in a mass ratio of 3:5; the initiator is diisopropylbenzene peroxide.

[0035] A method for preparing the bridge deck waterproof material comprises the following steps: heating asphalt to 178° C., adding a fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 1400 r / min for 2.5 hours, then sequentially adding cellulose nanocrystals, a coupling agent, a reinforcing material, a plasticizer, an anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil, and an initiator, continuing stirring for 1.8 hours, and starting a colloid mill for 1.8 hours to obtain the bridge deck waterproof material.

[0036] Example 5. A bridge deck waterproof material is made of the following raw materials in parts by weight: 22 parts of fluorosilicone thermoplastic polyurethane elastomer, 72 parts of asphalt, 5 parts of cellulose nanocrystals, 8 parts of 2-naphthylamine-4,8-disulfonic acid, 1.5 parts of phosphorus pentoxide, 0.8 parts of polyphosphoric acid, 6 parts of vinyl hydroxy silicone oil, 5 parts of SBR rubber powder, 2 parts of coupling agent, 8 parts of reinforcing material, 3 parts of 1,3,5-triglycidyl-S-triazinetrione, 2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 5 parts of plasticizer, 3 parts of anti-aging agent, and 0.3 parts of initiator.

[0037] The fluorosilicone thermoplastic polyurethane elastomer is made according to the method of Example 6 of the Chinese invention patent with authorization publication number CN111154064B; the asphalt is ordinary heavy traffic 70# asphalt; the cellulose nanocrystals have a length of 100-500nm and a diameter of 20-100nm, and are provided by Beijing Naxun Technology Co., Ltd.; the vinyl hydroxy silicone oil has a hydroxyl content of 6±0.5mol%, a vinyl content of 6±0.5mol%, and a viscosity of ≤33mm 2 / s, provided by Wuhan Huaxiang Kejie Biotechnology Co., Ltd.; the particle size of the SBR rubber powder is 20 mesh, provided by Jinan Bitu Chemical; the coupling agent is silane coupling agent KH550; the reinforcing material is a mixture of nano-boron fiber, wollastonite, and fly ash in a mass ratio of 1:1.2:3; the diameter of the nano-boron fiber is 500nm, and the aspect ratio is 20:1; the particle size of the wollastonite is 800 mesh; the particle size of the fly ash is 600 mesh; the plasticizer is epoxidized soybean oil; the anti-aging agent is antioxidant RD; and the initiator is diisopropylbenzene peroxide.

[0038] A method for preparing the bridge deck waterproof material comprises the following steps: heating asphalt to 180° C., adding a fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a speed of 1500 r / min for 3 hours, then sequentially adding cellulose nanocrystals, a coupling agent, a reinforcing material, a plasticizer, an anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil, and an initiator, continuing stirring for 2 hours, and starting a colloid mill for 2 hours to obtain the bridge deck waterproof material.

[0039] Comparative Example 1, a bridge deck waterproof material and a preparation method thereof, is substantially the same as Example 1, except that cellulose nanocrystals and 2-naphthylamine-4,8-disulfonic acid are not added.

[0040] Comparative Example 2, a bridge deck waterproof material and a preparation method thereof, are basically the same as Example 1, except that (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate and 1,3,5-triglycidyl-S-triazinetrione are not added.

[0041] In order to further illustrate the beneficial technical effects of the bridge deck waterproof materials involved in various embodiments of the present invention, relevant performance tests were conducted on the bridge deck waterproof materials involved in Examples 1-5 and Comparative Examples 1-2. The test results are shown in Table 1. The test method is as follows:

[0042] (1) Waterproof performance test method: Refer to GB / T 328.10-2007 "Test methods for building waterproof membranes Part 10: Waterproofness of asphalt and polymer waterproof membranes" for testing. Install the prepared test piece on the watertightness meter and apply 0.5 MPa water pressure for 24 hours. Observe whether there is water seepage on the surface of the test piece to judge the waterproof performance of the material.

[0043] (2) Low-temperature flexibility test: Refer to the low-temperature flexibility test method in GB / T 328.14-2007 "Test methods for building waterproofing membranes Part 14: Test methods for low-temperature flexibility of asphalt waterproofing membranes for building waterproofing membranes". Test the specimens at -24°C and observe whether there are cracks on the surface of the specimens. If at least 4 out of 5 specimens on a test surface are free of cracks, the test surface passes. If both the upper and lower test surfaces pass, the low-temperature flexibility is qualified; otherwise, it fails.

[0044] (3) High temperature stability test: Refer to the heat resistance test method in JCT 975-2005 "Waterproof coatings for roads and bridges" to conduct heat resistance test, and observe whether the test piece has flow, sliding and dripping after the test under the test conditions of 160℃.

[0045] (4) Bond strength test: Refer to the bond strength test method in JCT 975-2005 "Waterproof coatings for roads and bridges" for testing, and retain two decimal places for the test results.

[0046] (5) Heat aging and salt resistance test: refer to JCT 975-2005 "Waterproof coatings for roads and bridges" for measurement of the mass increase in heat aging test and the mass loss in salt treatment.

[0047] Table 1 Test results of bridge deck waterproofing material performance

[0048]

[0049] As can be seen from Table 1, the bridge deck waterproof material involved in the embodiment of the present invention has better waterproofness, low-temperature crack resistance and high-temperature stability, better heat aging resistance and salt resistance, and stronger bonding strength than the comparative example product; the combined use of cellulose nanocrystals, 2-naphthylamine-4,8-disulfonic acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate and 1,3,5-triglycidyl-S-triazinetrione is beneficial to improving the above-mentioned properties.

[0050] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A bridge deck waterproof material, characterized in that: The invention is prepared from the following raw materials in parts by weight: 15-22 parts of fluorosilicone thermoplastic polyurethane elastomer, 65-72 parts of asphalt, 3-5 parts of cellulose nanocrystals, 5-8 parts of 2-naphthylamine-4,8-disulfonic acid, 0.8-1.5 parts of phosphorus pentoxide, 0.5-0.8 parts of polyphosphoric acid, 4-6 parts of vinyl hydroxy silicone oil, 3-5 parts of SBR rubber powder, 1-2 parts of coupling agent, 5-8 parts of reinforcing material, 1-3 parts of 1,3,5-triglycidyl-S-triazinetrione, 1-2 parts of (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 3-5 parts of plasticizer, 1-3 parts of anti-aging agent, and 0.1-0.3 parts of initiator. The reinforcing material is prepared by mixing nano boron fiber, wollastonite and fly ash in a mass ratio of 1:(0.8-1.2):(1-3).

2. The bridge deck waterproof material according to claim 1, characterized in that: The asphalt is at least one of ordinary heavy traffic 70# asphalt, ordinary heavy traffic 90# asphalt, and 110# road asphalt.

3. The bridge deck waterproof material according to claim 1, characterized in that: The length of the cellulose nanocrystal is 100-500nm and the diameter is 20-100nm; the hydroxyl content of the vinyl hydroxy silicone oil is 6±0.5mol%, the vinyl content is 6±0.5mol%, and the viscosity is ≤33mm 2 / s.

4. The bridge deck waterproof material according to claim 1, characterized in that: The particle size of the SBR rubber powder is 20 meshes; the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

5. The bridge deck waterproof material according to claim 1, characterized in that: The diameter of the nano-boron fiber is 300-500nm, and the aspect ratio is (15-20):1; the particle size of the wollastonite is 500-800 mesh; and the particle size of the fly ash is 400-600 mesh.

6. The bridge deck waterproof material according to claim 1, characterized in that: The plasticizer is epoxidized soybean oil; the anti-aging agent is at least one of Antioxidant RD and Antioxidant 4020; and the initiator is dicumyl peroxide.

7. A method for preparing a bridge deck waterproof material according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: heating asphalt to 170-180° C., adding fluorosilicone thermoplastic polyurethane elastomer and SBR rubber powder, stirring and reacting at a rotation speed of 900-1500 r / min for 1-3 hours, then sequentially adding cellulose nanocrystals, coupling agent, reinforcing material, plasticizer, anti-aging agent, 2-naphthylamine-4,8-disulfonic acid, phosphorus pentoxide, polyphosphoric acid, (perfluoropropane-2,2-diyl)bis(4,1-phenylene) diacrylate, 1,3,5-triglycidyl-S-triazinetrione, vinyl hydroxy silicone oil and initiator, continuing stirring for 1-2 hours, starting a colloid mill for 1-2 hours, and obtaining a bridge deck waterproof material.

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