High-strength high-durability wheel-sticking-free emulsified asphalt tack coat oil and preparation method thereof

Abstract

The invention relates to the field of emulsified asphalt tack coat oil production, and particularly discloses a high-strength high-durability wheel-sticking-free emulsified asphalt tack coat oil which is characterized by comprising the following components in parts by mass: 60-70 parts of asphalt, 1.2-2 parts of an emulsifier, 2-3 parts of SBS, 0.3-0.5 part of oxidized wax, 0.5-1 part of a loading agent, 0.2-0.3 part of fibers and 0.05-0.1 part of an antioxidant. The compounding of the SBS, the oxidized wax, the fiber, the loading agent and the antioxidant reduces the tack coat oil adhered to the wheels of the construction machinery, so that the tack coat oil is not easy to lose and thin in the construction process, and the strength of the tack coat oil and the construction quality are not influenced; the method has the advantage of being easy to operate.

Description

Technical Field

[0001] This application relates to the field of emulsified asphalt tack coat production, and more specifically, it relates to a high-strength, high-durability, non-sticky emulsified asphalt tack coat and its preparation method. Background Technology

[0002] Emulsified asphalt tack coat is a key material used for bonding asphalt layers in road engineering. It is made by emulsifying asphalt, emulsifiers, and additives through a special process. Its main function is to form a high-strength bonding interface between the structural layers of asphalt pavement, ensuring uniform stress distribution throughout the pavement and preventing interlayer slippage, displacement, or peeling.

[0003] After the tack coat is laid, some construction machinery inevitably needs to pass over the laid tack coat for reasons such as surface layer paving. In this case, some tack coat will stick to the wheels of the construction machinery, resulting in the tack coat being thinner and the bonding strength being reduced, thus affecting the construction quality. Summary of the Invention

[0004] In order to reduce the amount of tack coat oil adhering to the wheels of construction machinery, so that the tack coat oil is less likely to become thinner or lose strength during construction, thus affecting the strength and quality of the tack coat oil, this application provides a high-strength, high-durability, non-sticky emulsified asphalt tack coat oil and its preparation method.

[0005] This application provides a high-strength, high-durability, non-sticky emulsified asphalt tack coat and its preparation method, employing the following technical solution:

[0006] In a first aspect, this application provides a high-strength, high-durability, non-sticky emulsified asphalt tack coat, employing the following technical solution:

[0007] A high-strength, high-durability, non-sticky emulsified asphalt tack coat comprises the following components by weight: 60-70 parts asphalt, 1.2-2 parts emulsifier, 2-3 parts SBS, 0.3-0.5 parts oxidized wax, 0.5-1 part loading agent, 0.2-0.3 parts fiber, and 0.05-0.1 parts antioxidant.

[0008] By adopting the above technical solution, the addition of SBS can modify emulsified asphalt to improve its elasticity, fatigue resistance and temperature stability, so that the tack coat interface is less prone to fatigue failure, thereby reducing the impact of temperature changes on the strength of the tack coat and making the surface layer less prone to peeling. The addition of fibers to the tack coat allows it to form a three-dimensional network structure, enhancing its crack resistance and shear strength, thereby further reducing the risk of interlayer delamination. The addition of antioxidants delays asphalt aging, ensuring the tack coat maintains stable performance under high temperature and UV conditions, thus improving its durability. The addition of oxidized wax allows it to migrate to the asphalt surface, reducing adhesion, while the addition of a loading agent adsorbs free asphalt components, further reducing the surface tack coat's viscosity and preventing it from adhering to wheels during construction. Simultaneously, the polar groups of oxidized wax promote the dispersion of SBS, enhancing its modification effect on the tack coat. The combination of SBS, oxidized wax, fibers, loading agents, and antioxidants in this application reduces the amount of tack coat adhering to the construction machinery wheels, preventing thinning and loss of the tack coat during construction, which could affect its strength and construction quality.

[0009] Preferably, the emulsifier comprises C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is (1.5~2.5):1.

[0010] By adopting the above technical solutions, C18 quaternary ammonium salt provides strong charge adsorption capacity, enhancing the adhesion between tack coat and aggregate. In addition, C18 quaternary ammonium salt improves the storage stability of emulsified asphalt, and the cationic properties of C18 quaternary ammonium salt can be directionally adsorbed on the surface of fibers (such as polyester) to form "fiber-asphalt" chemical bonds, thereby improving the interfacial tensile strength of the tack coat. The EO chain of OP-10 can entangle SBS molecules, making up for the insufficient coating of C18, preventing SBS aggregation, and further improving the stability of emulsified asphalt tack coat. OP-10 promotes uniform wax dispersion, and the loading agent can adsorb free wax to extend the anti-sticking time of the tack coat. In addition, OP-10 can improve the low-temperature stability and hard water resistance of the emulsion, so that the production of tack coat can adapt to the variable water quality conditions at high altitudes.

[0011] Preferably, the loading agent comprises organo-modified montmorillonite.

[0012] By adopting the above technical solutions, the nanolayered structure of montmorillonite can effectively intercalate oxidized wax molecules, delaying their migration to the surface and making the non-stick properties of the tack coat more durable. After the organic montmorillonite sheets are peeled off in the asphalt, they form a "nano-brick wall" structure that interpenetrates with the SBS network, significantly improving the high-temperature rutting resistance and low-temperature crack resistance of the tack coat. The polar groups of organic montmorillonite interact with the styrene segments in SBS, reducing SBS aggregation and improving emulsion uniformity. Organic montmorillonite can form a "carrot house structure" in the aqueous phase to impart thixotropy to the emulsion, making the emulsion thicken upon standing and thinner under shear, preventing particle sedimentation in the emulsified asphalt tack coat during storage, thereby improving the storage stability of the emulsified asphalt tack coat. The cationic C18 quaternary ammonium salt electrostatically binds with the negatively charged montmorillonite sheets, enhancing the zeta potential of the emulsion, thereby achieving the purpose of resisting electrolyte demulsification and further improving the stability of the emulsified asphalt tack coat.

[0013] Preferably, the loading agent comprises maleic anhydride-grafted modified organo-montmorillonite.

[0014] By adopting the above technical solutions, the carboxyl groups of maleic anhydride can undergo esterification or grafting reactions with the active groups in asphalt and the double bonds in SBS to form chemical bonds, thereby significantly improving the interfacial bonding force; the polar groups of maleic anhydride are bonded to the carboxyl / hydroxyl groups of oxidized wax through hydrogen bonds, realizing the directional fixation of oxidized wax, thereby reducing the adhesion between the tack coat and the wheel while extending the anti-sticking time of the tack coat; the grafted chains of maleic anhydride can improve the compatibility between montmorillonite and asphalt, making it easier to peel off into nanosheets and form a "nano-reinforced skeleton"; the carboxyl groups of maleic anhydride can capture free radicals and synergistically delay asphalt aging with antioxidants, improving the weather resistance of the tack coat.

[0015] Preferably, the emulsified asphalt tack coat further includes 0.1 to 0.2 parts by weight of siloxane.

[0016] By adopting the above technical solutions, the active groups of siloxane react with the polar components in asphalt and the silanol groups of the base layer to form Si-OC or Si-O-Si covalent bonds, which significantly improves the bonding strength of the tack coat. Siloxane forms a hydrophobic film at the interface, reducing water permeability and allowing the tack coat to maintain high adhesion after immersion in water or freeze-thaw cycles. Siloxane can also coat the outer surface of fibers to reduce interfacial defects between fibers and asphalt and enhance stress transfer efficiency. The hydrophobic segments of siloxane are compatible with oxidized wax, helping to achieve uniform dispersion of oxidized wax and prolonging the non-sticking aging time of oxidized wax.

[0017] Preferably, the emulsified asphalt tack coat further includes 3 to 5 parts by weight of SBR latex.

[0018] By adopting the above technical solutions, the flexible molecular chains of SBR latex combine with SBS to form a dual-elastic network, which greatly improves the low-temperature ductility of asphalt. The small particle size of SBR latex allows it to penetrate into the micropores of the base layer, and after curing, it forms a dual effect of mechanical interlocking and chemical bonding to improve the bonding strength between the tack coat and the base layer. SBR latex contains its own emulsifier, which can be compounded with C18 quaternary ammonium salt / OP-10 to form composite micelles, enhancing the stability of the emulsion. The slow cracking characteristics of SBR can balance the fast cracking tendency of cationic emulsifiers, which facilitates the application of tack coat.

[0019] Preferably, the SBR latex is a cationic SBR latex.

[0020] Secondly, this application provides a method for preparing high-strength, high-durability, non-sticky emulsified asphalt tack coat oil, using the following technical solution:

[0021] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0022] S1. Heat the asphalt until it melts;

[0023] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase;

[0024] S3. Dissolve the emulsifier in water and mix thoroughly. The mass ratio of emulsifier to water is 17% to 23%. Then add hydrochloric acid solution to adjust the pH to 2 to 3 to obtain the aqueous phase.

[0025] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Other components are mixed evenly with the precast material to obtain emulsified asphalt tack coat.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. The addition of SBS can modify emulsified asphalt to improve its elasticity, fatigue resistance and temperature stability, so that the tack coat interface is less prone to fatigue failure, thereby reducing the impact of temperature changes on the strength of the tack coat and making the surface layer less prone to peeling. The addition of fibers to the tack coat allows it to form a three-dimensional network structure, enhancing its crack resistance and shear strength, thereby further reducing the risk of interlayer delamination. The addition of antioxidants delays asphalt aging, ensuring the tack coat maintains stable performance under high temperature and UV conditions, thus improving its durability. The addition of oxidized wax allows it to migrate to the asphalt surface, reducing adhesion, while the addition of a loading agent adsorbs free asphalt components, further reducing the surface tack coat's viscosity and preventing it from adhering to wheels during construction. Simultaneously, the polar groups of oxidized wax promote the dispersion of SBS, enhancing its modification effect on the tack coat. The combination of SBS, oxidized wax, fibers, loading agents, and antioxidants in this application reduces the amount of tack coat adhering to the construction machinery wheels, preventing thinning and loss of the tack coat during construction, which could affect its strength and construction quality.

[0028] 2. The method of this application has the advantage of being simple to operate. Detailed Implementation

[0029] The following detailed description of this application is provided in conjunction with specific examples. All raw materials used in this application are commercially available. Specifically, the asphalt used is 70# base asphalt; the C18 quaternary ammonium salt, octadecyltrimethylammonium chloride, was purchased from Shanghai Hande Yunjia New Material Co., Ltd.; the OP-10 emulsifier was purchased from Shanghai Lianji Chemical Co., Ltd.; the siloxane used is amino-terminated polydimethylsiloxane, purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd.; the SBR latex is cationic SBR styrene-butadiene latex, purchased from Boxing County Runda Chemical Co., Ltd.; the oxidized wax is Honeywell AC316A from Jiangsu Faer Wax Industry Co., Ltd.; the fiber is polyester fiber, with a length of 3-6 mm and a diameter of 10-20 μm; the montmorillonite was purchased from Shijiazhuang Zhengyu New Material Technology Co., Ltd., and the montmorillonite specification is 325 mesh; and the anionic SBR latex was purchased from Shandong Fushun New Material Technology Co., Ltd.

[0030] Example of raw material preparation

[0031] Preparation Example 1

[0032] Organic montmorillonite

[0033] S1. Add 20g of montmorillonite to deionized water and stir magnetically at 60℃ for 2 hours to form a uniform suspension with a solid content of 2.5%. Then, treat the suspension with ultrasound at 300W and 20kHz for 10 minutes.

[0034] S2. Dissolve 7.5g of C18 quaternary ammonium salt in 200mL of ethanol aqueous solution, wherein the ethanol aqueous solution has a mass concentration of 70%, to obtain quaternary ammonium salt solution;

[0035] S3. Add the quaternary ammonium salt solution dropwise to the montmorillonite suspension and stir at 60℃ for 6 hours. Then add 0.1 mol / L hydrochloric acid to adjust the pH to 4-5 and let it stand for 15 minutes to obtain the mixture.

[0036] S4. Centrifuge the mixture to collect the precipitate, and wash the precipitate three times with a 50% (v / v) ethanol aqueous solution.

[0037] S5. The washed precipitate is dried at 60℃ for 24 hours, and then ground through a 200-mesh sieve to obtain organic montmorillonite.

[0038] Preparation Example 2

[0039] Maleic anhydride-grafted modified organic montmorillonite

[0040] S1. Disperse 100g of organo-modified montmorillonite into 1kg of xylene, then add 10g of maleic anhydride and 0.1g of dicumyl peroxide to obtain a mixture;

[0041] S2. Under nitrogen protection, the mixture was refluxed at 110°C for 4 hours;

[0042] S3. The mixture reacted in S2 is centrifuged, then the precipitate is washed three times with acetone, then washed three times with ethanol, and finally dried under vacuum at 60°C for 24 hours and passed through a 200-mesh sieve to obtain maleic anhydride-grafted modified organo-montmorillonite.

[0043] Example

[0044] Example 1

[0045] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0046] S0. Weigh the following components by weight: 60 kg asphalt, 1.2 kg emulsifier, 2 kg SBS, 0.3 kg oxidized wax, 0.5 kg loading agent, 0.2 kg fiber, and 0.05 kg antioxidant. The emulsifier is C18 quaternary ammonium salt, the loading agent is montmorillonite, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0047] S1. Heat the asphalt to 165℃ until it melts;

[0048] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0049] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 17%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 2 to obtain the aqueous phase.

[0050] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Siloxane and fiber are then mixed evenly with the precast material in sequence to obtain emulsified asphalt tack coat. The mixing speed during mixing is 200 r / min.

[0051] Example 2

[0052] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0053] S0. Weigh the following components by weight: 70 kg asphalt, 2 kg emulsifier, 3 kg SBS, 0.5 kg oxidized wax, 1 kg loading agent, 0.3 kg fiber, and 0.1 kg antioxidant. The emulsifier is C18 quaternary ammonium salt, the loading agent is montmorillonite, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0054] S1. Heat the asphalt to 165℃ until it melts;

[0055] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0056] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 23%. Then add 0.1 mol / L hydrochloric acid solution to adjust the pH to 3 to obtain the aqueous phase.

[0057] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Siloxane and fiber are then mixed evenly with the precast material in sequence to obtain emulsified asphalt tack coat. The mixing speed during mixing is 200 r / min.

[0058] Example 3

[0059] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0060] S0. Weigh the following components by weight: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, and 0.07 kg antioxidant. The emulsifier is C18 quaternary ammonium salt, the loading agent is montmorillonite, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0061] S1. Heat the asphalt to 165℃ until it melts;

[0062] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0063] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 20%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 3 to obtain the aqueous phase.

[0064] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Siloxane and fiber are then mixed evenly with the precast material in sequence to obtain emulsified asphalt tack coat. The mixing speed during mixing is 200 r / min.

[0065] Example 4

[0066] The difference between this embodiment and Embodiment 3 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. Montmorillonite is used as the loading agent, lignin fiber is used as the fiber, and antioxidant 168 is used as the antioxidant.

[0067] Example 5

[0068] The difference between this embodiment and Embodiment 3 is as follows: S0, each component is weighed according to the following mass parts: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 2.5:1. Montmorillonite is used as the loading agent, lignin fiber is used as the fiber, and antioxidant 168 is used as the antioxidant.

[0069] Example 6

[0070] The difference between this embodiment and Embodiment 3 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 2:1. Montmorillonite is used as the loading agent, lignin fiber is used as the fiber, and antioxidant 168 is used as the antioxidant.

[0071] Example 7

[0072] The difference between this embodiment and Example 6 is as follows: S0, each component is weighed according to the following mass parts: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is the organic montmorillonite prepared in Preparation Example 1, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0073] Example 8

[0074] The difference between this embodiment and Example 6 is as follows: S0, each component is weighed according to the following mass parts: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite obtained in Preparation Example 2. The fiber is lignin fiber and the antioxidant is antioxidant 168.

[0075] Example 9

[0076] The difference between this embodiment and Example 8 is as follows: S0, each component is weighed according to the following mass parts: 65 kg of asphalt, 1.6 kg of emulsifier, 2.5 kg of SBS, 0.4 kg of oxidized wax, 0.75 kg of loading agent, 0.25 kg of fiber and 0.07 kg of antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Example 2. The fiber is polyester fiber and the antioxidant is antioxidant 168.

[0077] Example 10

[0078] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0079] S0. Weigh the following components by mass: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.1 kg siloxane, and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane.

[0080] S1. Heat the asphalt to 165℃ until it melts;

[0081] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0082] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 20%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 3 to obtain the aqueous phase.

[0083] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Siloxane and fiber are then mixed evenly with the precast material in sequence to obtain emulsified asphalt tack coat. The mixing speed during mixing is 200 r / min.

[0084] Example 11

[0085] The difference between this embodiment and Example 10 is as follows: S0, each component is weighed according to the following mass parts: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.2 kg siloxane and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane.

[0086] Example 12

[0087] The difference between this embodiment and Example 10 is as follows: S0, each component is weighed according to the following mass parts: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane.

[0088] Example 13

[0089] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps: S0, weigh the following components by mass: 65 kg asphalt, 1.6 kg emulsifier, 2.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, 3 kg SBR latex, and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane. The SBR latex is cationic SBR latex.

[0090] S1. Heat the asphalt to 165℃ until it melts;

[0091] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0092] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 20%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 3 to obtain the aqueous phase.

[0093] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. SBR latex, siloxane and fiber are added to the precast material in sequence and mixed evenly with the precast material to obtain emulsified asphalt tack coat. The mixing speed is 200 r / min.

[0094] Example 14

[0095] The difference between this embodiment and Example 13 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, 3 kg SBR latex and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane. The SBR latex is cationic SBR latex.

[0096] Example 15

[0097] The difference between this embodiment and Example 13 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, 4 kg SBR latex and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane. The SBR latex is cationic SBR latex.

[0098] Example 16

[0099] The difference between this embodiment and Example 15 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, 4 kg SBR latex and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane. The SBR latex is anionic SBR latex.

[0100] Example 17

[0101] The difference between this embodiment and Example 15 is as follows: S0. Weigh each component by mass: 65 kg asphalt, 1.6 kg emulsifier, 5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, 4 kg SBR latex and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is epoxy siloxane. The SBR latex is cationic SBR latex.

[0102] Comparative Example

[0103] Comparative Example 1

[0104] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0105] S0. Weigh the following components by weight: 60 kg asphalt, 1.2 kg emulsifier, 2 kg SBS, 0.5 kg loading agent, 0.2 kg fiber, and 0.05 kg antioxidant. The emulsifier is C18 quaternary ammonium salt, the loading agent is montmorillonite, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0106] S1. Heat the asphalt to 165℃ until it melts;

[0107] S2. Add SBS, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0108] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 17%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 2 to obtain the aqueous phase.

[0109] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Other components are mixed evenly with the precast material to obtain emulsified asphalt tack coat.

[0110] Comparative Example 2

[0111] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps:

[0112] S0. Weigh the following components by mass: 60 kg asphalt, 1.2 kg emulsifier, 0.3 kg oxidized wax, 0.5 kg loading agent, 0.2 kg fiber, and 0.05 kg antioxidant. The emulsifier is C18 quaternary ammonium salt, the loading agent is montmorillonite, the fiber is lignin fiber, and the antioxidant is antioxidant 168.

[0113] S1. Heat the asphalt to 165℃ until it melts;

[0114] S2. Oxidized wax, antioxidant and loading agent are added to the molten base asphalt in sequence and mixed evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0115] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 17%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 2 to obtain the aqueous phase.

[0116] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Other components are mixed evenly with the precast material to obtain emulsified asphalt tack coat.

[0117] Comparative Example 3

[0118] A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat includes the following steps: S0, weigh the following components by mass: 65 kg asphalt, 1.6 kg emulsifier, 5.5 kg SBS, 0.4 kg oxidized wax, 0.75 kg loading agent, 0.25 kg fiber, 0.15 kg siloxane, and 0.07 kg antioxidant. The emulsifier is obtained by uniformly mixing C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is 1.5:1. The loading agent is maleic anhydride-modified organic montmorillonite prepared in Preparation Example 2. The fiber is polyester fiber. The antioxidant is antioxidant 168. The siloxane is aminosiloxane.

[0119] S1. Heat the asphalt to 165℃ until it melts;

[0120] S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase. The shear rate during the mixing process is 3000 r / min and the temperature is 170℃.

[0121] S3. Dissolve the emulsifier in water at 65℃ and mix thoroughly. The mass ratio of emulsifier to water is 20%. Then add 0.1mol / L hydrochloric acid solution to adjust the pH to 3 to obtain the aqueous phase.

[0122] S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. SBR latex, siloxane and fiber are added to the precast material in sequence and mixed evenly with the precast material to obtain emulsified asphalt tack coat. The mixing speed is 200 r / min.

[0123] Performance testing

[0124] Detection methods

[0125] According to T0655-1993, the tack coat oils prepared in the examples and comparative examples were subjected to a 5-day storage stability test, and the data are recorded in Table 1.

[0126] The tack coat oils prepared in the examples and preparation examples were subjected to pull-out strength tests at 25°C according to AASHTOT 361-16, and the data are recorded in Table 1.

[0127] The softening point of the tack coat oils prepared in the examples and preparation examples was tested according to T0606-2000, and the data are recorded in Table 1.

[0128] According to T0604-2011, the penetration of the tack coat oils prepared in the examples and preparation examples was tested, and the data are recorded in Table 1.

[0129] The tack coat oils prepared in the examples and preparation examples were tested according to the tire adhesion rate test method, and the data are recorded in Table 1. Tire adhesion rate test (4h):

[0130] A1. Apply tack coat to the steel plate at a rate of 0.3 kg / m2 to obtain the sample;

[0131] A2. Cut out a rubber sheet with dimensions of 200mm*50mm*1mm;

[0132] A3. Place the rubber sheet, blank steel plate and sample in a 60℃ oven for 4 hours, weigh the blank steel plate and sample, and calculate the mass difference M0.

[0133] A4. Attach the rubber sheet to the sample to obtain the sample piece, then put the sample piece into the rutting instrument and roll it for 1 minute. Then peel off the rubber sheet, and control the peeling time within 2 seconds.

[0134] A5. Weigh the blank steel plate and the sample after the rubber sheet has been peeled off to obtain the mass difference M1. Calculate the tire adhesion rate according to the following formula.

[0135] Tire adhesion rate (%) = (M0-M1) / M0*100 / 100.

[0136] The tack coat oils prepared in the examples and preparation examples were tested according to the tire adhesion rate test method, and the data are recorded in Table 1. Tire adhesion rate test (48h):

[0137] A1. Apply tack coat to the steel plate at a rate of 0.3 kg / m2 to obtain the sample;

[0138] A2. Cut out a rubber sheet with dimensions of 200mm*50mm*1mm;

[0139] A3. Place the rubber sheet, blank steel plate and sample in a 60℃ oven for 48 hours, weigh the blank steel plate and sample, and calculate the mass difference M0.

[0140] A4. Attach the rubber sheet to the sample to obtain the sample piece, then put the sample piece into the rutting instrument and roll it for 1 minute. Then peel off the rubber sheet, and control the peeling time within 2 seconds.

[0141] A5. Weigh the blank steel plate and the sample after the rubber sheet has been peeled off to obtain the mass difference M1. Calculate the tire adhesion rate according to the following formula.

[0142]

[0143] Tire adhesion rate (%) = (M0-M1) / M0*100 / 100.

[0144] Table 1

[0145] As can be seen from Example 1 and Comparative Example 1 and Table 1, the addition of oxidized wax in this application can significantly reduce the amount of emulsified asphalt adhesive oil adhering to the wheels, while increasing the softening point of the emulsified asphalt, so as to reduce the amount of emulsified asphalt adhesive oil adhering to the wheels under high-temperature operating conditions.

[0146] Combining Examples 3 and 4 with Table 1, it can be seen that the use of two emulsifiers in Example 4 significantly improved the various properties of the emulsified asphalt tack coat. This is because: C18 quaternary ammonium salt improves the storage stability of the emulsified asphalt, and the cationic properties of C18 quaternary ammonium salt can be directionally adsorbed onto the fiber surface to form a "fiber-asphalt" chemical bond, thereby improving the interfacial tensile strength of the tack coat. In addition, OP-10 promotes the uniform dispersion of wax, and the loading agent can adsorb free wax, further reducing the amount of emulsified asphalt tack coat adhering to the wheels, while also extending the anti-sticking time of the tack coat.

[0147] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high-strength, high-durability, non-sticky emulsified asphalt tack coat, characterized in that, It includes the following components by weight: 60-70 parts asphalt, 1.2-2 parts emulsifier, 2-3 parts SBS, 0.3-0.5 parts oxidized wax, 0.5-1 part loading agent, 0.2-0.3 parts fiber and 0.05-0.1 parts antioxidant.

2. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 1, characterized in that, The emulsifier comprises C18 quaternary ammonium salt and OP-10, and the mass ratio of C18 quaternary ammonium salt to OP-10 is (1.5~2.5):

1.

3. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 1, characterized in that, The loading agent includes organo-modified montmorillonite.

4. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 2, characterized in that, The loading agent includes maleic anhydride-grafted modified organo-montmorillonite.

5. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 4, characterized in that, The emulsified asphalt tack coat also includes 0.1 to 0.2 parts by weight of siloxane.

6. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 5, characterized in that, The emulsified asphalt tack coat also includes 3 to 5 parts by weight of SBR latex.

7. The high-strength, high-durability, non-sticky emulsified asphalt tack coat oil according to claim 6, characterized in that, The SBR latex is a cationic SBR latex.

8. A method for preparing a high-strength, high-durability, non-sticky emulsified asphalt tack coat, characterized in that, Includes the following steps: S1. Heat the asphalt until it melts; S2. Add SBS, oxidized wax, antioxidant and loading agent to the molten base asphalt in sequence and mix evenly to obtain the asphalt phase; S3. Dissolve the emulsifier in water and mix thoroughly. The mass ratio of emulsifier to water is 17% to 23%. Then add hydrochloric acid solution to adjust the pH to 2 to 3 to obtain the aqueous phase. S4. After the asphalt phase and the water phase are mixed evenly, a precast material is obtained. Other components are mixed evenly with the precast material to obtain emulsified asphalt tack coat.

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