Environment-friendly odorless instant high-viscosity asphalt and preparation method thereof

Abstract

The invention relates to the technical field of modified asphalt, in particular to environment-friendly odorless instant high-viscosity asphalt which comprises the following components in parts by weight: 60-70 parts of matrix asphalt, 15-20 parts of rubber powder, 5-8 parts of a cross-linking agent, 5-10 parts of an odorless agent, 3-6 parts of a compatilizer, 1-3 parts of an anti-aging agent, 2-4 parts of a light screening agent, 1-5 parts of a stabilizer and 2-5 parts of a coupling agent. The odor removing agent is added, so that the release of smoke with pungent odor in the mixing or spreading operation process is effectively reduced, the odor removing effect is excellent, the material is more environment-friendly, and the health of construction personnel is protected; by adding the compatilizer, the dispersity of the asphalt mixture in the mixing process can be improved, the construction workability is good, and the construction is more convenient; by adding the anti-aging agent, the light screening agent, the stabilizer and the coupling agent, the use performance of the asphalt mixture can be effectively improved, the asphalt mixture is good in thermal stability, excellent in aging resistance and good in obdurability and viscoelasticity, and the application range of asphalt is widened. Meanwhile, the preparation process is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of modified asphalt, and particularly relates to an environmentally friendly odorless instant high-viscosity asphalt and a preparation method thereof. Background Art

[0002] At present, in the technical field of modified asphalt, asphalt materials obtained by modifying petroleum asphalt with rubber powder made from waste tires not only improve the high and low temperature performance of asphalt, slow down the aging of asphalt pavement, improve the driving safety of vehicles and the service life of roads, but also contribute to the recycling of waste rubber and environmental protection. Therefore, it has also attracted more and more attention. However, due to the high production temperature of rubber modified asphalt, the temperature required for mixing and paving rubber asphalt mixture is also high, resulting in a large amount of odor gas and asphalt fumes during production and construction, causing environmental pollution and affecting physical health. The production and application of rubber modified asphalt are restricted. At the same time, too high temperature will also cause problems such as asphalt aging to a certain extent, which has an adverse effect on its service performance. Summary of the Invention

[0003] Aiming at the technical problems in the prior art, the purpose of the present invention is to provide an environmentally friendly odorless instant high-viscosity asphalt, which solves the problem of generating a large amount of odor substances during the mixing or paving process of modified asphalt mixture, is more environmentally friendly and will not cause damage to the human body; at the same time, it effectively improves the service performance of asphalt and improves the applicable range of rubber modified asphalt. At the same time, the present invention provides a preparation method thereof.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows: On the one hand, the present invention provides an environmentally friendly odorless instant high-viscosity asphalt, comprising the following components in parts by weight: 60 - 70 parts of matrix asphalt, 15 - 20 parts of rubber powder, 5 - 8 parts of crosslinking agent, 5 - 10 parts of odor remover, 3 - 6 parts of compatibilizer, 1 - 3 parts of antioxidant, 2 - 4 parts of light shielding agent, 1 - 5 parts of stabilizer, and 2 - 5 parts of coupling agent.

[0005] The present invention provides an environmentally friendly odorless instant high-viscosity asphalt. By adding an odorless agent, the release of fumes with pungent odors during the mixing or paving operation is effectively reduced, the odorless effect is excellent, it is more environmentally friendly and protects the health of construction workers; at the same time, by adding a compatibilizer, the dispersibility of the asphalt mixture during mixing can be improved, the workability during construction is good, and the construction is more convenient; by adding an antioxidant, a light shielding agent, a stabilizer and a coupling agent, the service performance of the asphalt mixture can be effectively improved, the asphalt mixture has good thermal stability, excellent aging resistance, and also has good toughness and viscoelasticity, improving the applicable range of the asphalt. Among them, the matrix asphalt is one of 70#, 90# or 110# asphalt, and the rubber powder uses C1 or C2 vulcanized rubber powder, and its technical indicators comply with "Vulcanized Rubber Powder GB / T19208-2008".

[0006] On the basis of the above technical solution, the cross-linking agent is insoluble sulfur. The sulfur in the insoluble sulfur cross-links with the modified asphalt, so that a cross-linked network is formed between the waste rubber and the asphalt, which can fundamentally inhibit the generation of hydrogen sulfide gas, reduce the odor generated during the production or processing of asphalt, reduce environmental pollution, and ensure the safety of operators; at the same time, it can also enhance the service performance of the asphalt.

[0007] On the basis of the above technical solution, the odorless agent is one or more of zinc ricinoleate, ethoxystearamide, and zinc oxide. Preferably, when the odorless agent uses a mixture of zinc ricinoleate and zinc oxide, the mass ratio of zinc ricinoleate to zinc oxide is 2:5. Zinc ricinoleate can react with sulfur-containing compounds, etc., and zinc oxide can react with hydrogen sulfide and sulfur dioxide to eliminate odors; at the same time, it can also promote the cross-linking process of sulfur and improve the stability of the overall asphalt mixture system, and the two cooperate to achieve a better odorless effect.

[0008] Preferably, the odorless agent is selected as ethoxystearamide, which can chemically react with heteroatoms such as sulfur and nitrogen in the asphalt above 140 °C to convert into high-boiling compounds, thereby inhibiting the volatilization of harmful substances, reducing the emission of unpleasant gases generated by the high-temperature oxidation and light-component volatilization of the asphalt, improving the production and construction environment of the asphalt and asphalt mixture, and is applicable to the production of modified asphalt, waterproof coiled materials, asphalt mixture production and urban road asphalt mixture paving, especially has a significant inhibitory effect on the odor of rubber asphalt.

[0009] On the basis of the above technical solution, the compatibilizer is one or more of paraffin wax, tall oil, phenyl silicone oil, methylphenyl silicone oil, methylchlorophenyl silicone oil, and methylethoxysilicone oil.

[0010] The compatibilizer used is silicone oil, especially silicone oil containing a benzene ring in the organic group, which has good compatibility with asphalt. At the same time, it has advantages such as good radiation resistance, high oxidation stability, ultraviolet resistance, and chemical resistance, which can effectively improve the service performance of asphalt pavement. Paraffin has good compatibility with SEBS, which can improve the fluidity and ductility of the asphalt system during use, making the construction operation more convenient; and realizing the rapid solubility of asphalt mixture.

[0011] Based on the above technical solution, the anti-aging agent is a linear triblock copolymer with a polystyrene end segment and an ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block.

[0012] Specifically, SEBS (Styrene Ethylene Butylene Styrene) is selected as the anti-aging agent. It is a linear triblock copolymer with a polystyrene end segment and an ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block; it does not contain unsaturated double bonds and can be processed and used without vulcanization. It has good ultraviolet stability, antioxidant property, and thermal stability, which can improve the stability and aging resistance of asphalt materials; at the same time, it also has high elasticity, which can improve the toughness of asphalt mixture. It can be reused, has a more practical environmental protection performance, can be processed at high temperatures without easy decomposition, and can improve the stability of the overall asphalt mixture.

[0013] Based on the above technical solution, the light shielding agent is a black coating or carbon black. Among them, carbon black materials can not only enhance the strength of asphalt materials, but also play a role in shading, reducing the photo-oxidation process of asphalt materials during long-term use, effectively improving the anti-aging performance of asphalt, and extending the service life.

[0014] Based on the above technical solution, the stabilizer is surface-modified modified graphene oxide prepared with graphene oxide as the base material and zinc stearate as the modifier.

[0015] Graphene oxide has a high-density pore structure, which can adsorb harmful gases in asphalt fumes in the pores to achieve the effect of odor purification; at the same time, the modified graphene oxide has good surface activity and can react chemically with harmful gases in the fumes to form stable compounds, thereby reducing the release of odor gases and having a good odor purification effect. It also has good thermal stability and good lubricating performance, which can not only achieve the use stability during the asphalt mixing process, but also realize the fluidity of asphalt, facilitating construction.

[0016] Based on the above technical solution, the coupling agent is one or more of silane coupling agents, titanate coupling agents, and aluminate coupling agents.

[0017] Based on the above technical solution, the coupling agent is one or more of silane coupling agent KH570, tetraethoxysilane, and chelating titanate coupling agent 311.

[0018] The addition of the coupling agent and the crosslinking agent can further improve the adhesiveness and elasticity of the material. The coupling agent can also improve the connection between the organic substrate and the inorganic material, reduce the risk of peeling and cracking of the asphalt road during long-term use, and improve the service life and stability.

[0019] On the other hand, the present invention provides a method for preparing an environmentally friendly odorless instant high-viscosity asphalt, comprising the following steps: Step 1: Accurately weigh each raw material according to the dosage ratio for standby, including 60 - 70 parts of matrix asphalt, 15 - 20 parts of rubber powder, 5 - 8 parts of crosslinking agent, 5 - 10 parts of odorless agent, 3 - 6 parts of compatibilizer, 1 - 3 parts of antioxidant, 2 - 4 parts of light shielding agent, 1 - 5 parts of stabilizer, and 2 - 5 parts of coupling agent; Step 2: Stir and heat the matrix asphalt to 160°C - 190°C to uniformly heat the matrix asphalt, add the rubber powder and the crosslinking agent, stir evenly, and shear and develop in a high-speed shearing device for 1 h; Step 3: Add the odorless agent, compatibilizer, antioxidant, light shielding agent, stabilizer, and coupling agent to the mixture in Step 2, and continue stirring and reacting to obtain the final environmentally friendly odorless instant high-viscosity asphalt mixture.

[0020] The beneficial effects of the technical solution provided by the present invention are as follows: The present invention provides an environmentally friendly odorless instant high-viscosity asphalt. By adding an odorless agent, the release of irritating fumes during the mixing or paving operation is effectively reduced, the odorless effect is excellent, it is more environmentally friendly and protects the health of construction workers; at the same time, by adding a compatibilizer, the dispersibility of the asphalt mixture during mixing can be improved, the workability during construction is good, and the construction is more convenient; by adding an antioxidant, a light shielding agent, a stabilizer, and a coupling agent, the service performance of the asphalt mixture can be effectively improved, the asphalt mixture has good thermal stability, excellent aging resistance, and also has good toughness and viscoelasticity, improving the application range of the asphalt. At the same time, the present invention also provides a preparation method thereof, and the preparation process is simple and the operation is more convenient. Specific Embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the content in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items. It should be understood that, unless otherwise specified, all raw materials in this invention can be obtained commercially.

[0023] Example 1 The present invention provides an environmentally friendly odorless instant high-viscosity asphalt, comprising the following components in parts by weight: The matrix asphalt is 70# asphalt; the rubber powder is C1 vulcanized rubber powder; the crosslinking agent is insoluble sulfur; the odorless agent is ethoxystearamide; the compatibilizer is paraffin wax; the antioxidant is SEBS linear triblock copolymer; the light shielding agent is carbon black; the stabilizer is modified graphene oxide; and the coupling agent is silane coupling agent KH570;.

[0024] The present invention provides a preparation method of an environmentally friendly odorless instant high-viscosity asphalt, comprising the following steps: Step 1, accurately weigh each raw material according to the dosage ratio for standby, 60 parts of matrix asphalt, 15 parts of rubber powder, 5 parts of crosslinking agent, 5 parts of odorless agent, 3 parts of compatibilizer, 1 part of antioxidant, 2 parts of light shielding agent, 1 part of stabilizer and 2 parts of coupling agent; Step 2, stir and heat the matrix asphalt to 185 °C to uniformly heat the matrix asphalt, add the rubber powder and the crosslinking agent, stir evenly and shear and develop in a high-speed shearing device for 1 h; Step 3, add the odorless agent, the compatibilizer, the antioxidant, the light shielding agent, the stabilizer and the coupling agent to the mixture in Step 2, and continue to stir and react to obtain the final environmentally friendly odorless instant high-viscosity asphalt mixture.

[0025] Example 2 The present invention provides an environmentally friendly odorless instant high-viscosity asphalt, comprising the following components in parts by weight: The matrix asphalt is 90# asphalt; the rubber powder is C1 vulcanized rubber powder; the crosslinking agent is insoluble sulfur; the odorless agent is ethoxystearamide; the compatibilizer is phenyl silicone oil; the antioxidant is SEBS linear triblock copolymer; the light shielding agent is carbon black; the stabilizer is modified graphene oxide; and the coupling agent is silane coupling agent KH570;.

[0026] The present invention provides a preparation method of an environmentally friendly odorless instant high-viscosity asphalt, comprising the following steps: Step 1: Accurately weigh each raw material according to the dosage ratio for standby, including 62 parts of matrix asphalt, 17 parts of rubber powder, 7 parts of crosslinking agent, 6 parts of odorless agent, 4 parts of compatibilizer, 2 parts of antioxidant, 2 parts of light shielding agent, 2 parts of stabilizer, and 3 parts of coupling agent; Step 2: Stir and heat the matrix asphalt to 185°C to uniformly heat the matrix asphalt, add the rubber powder and crosslinking agent, stir evenly, and shear and develop in a high-speed shearing device for 1 hour; Step 3: Add the odorless agent, compatibilizer, antioxidant, light shielding agent, stabilizer, and coupling agent to the mixture in Step 2, continue stirring and reacting to obtain the final environmentally friendly odorless and instant high-viscosity asphalt mixture.

[0027] Example 3 The present invention provides an environmentally friendly odorless and instant high-viscosity asphalt, comprising the following components in parts by weight: The matrix asphalt is 70# asphalt; the rubber powder is C2 vulcanized rubber powder; the crosslinking agent is insoluble sulfur; the odorless agent is zinc ricinoleate and zinc oxide with a mass ratio of 2:5; the compatibilizer is tall oil and phenyl silicone oil; the antioxidant is SEBS linear triblock copolymer; the light shielding agent is carbon black; the stabilizer is modified graphene oxide; and the coupling agent is chelating titanate coupling agent 311.

[0028] The present invention provides a preparation method of an environmentally friendly odorless and instant high-viscosity asphalt, comprising the following steps: Step 1: Accurately weigh each raw material according to the dosage ratio for standby, including 65 parts of matrix asphalt, 18 parts of rubber powder, 6 parts of crosslinking agent, 8 parts of odorless agent, 5 parts of compatibilizer, 2 parts of antioxidant, 3 parts of light shielding agent, 2 parts of stabilizer, and 3 parts of coupling agent; Step 2: Stir and heat the matrix asphalt to 185°C to uniformly heat the matrix asphalt, add the rubber powder and crosslinking agent, stir evenly, and shear and develop in a high-speed shearing device for 1 hour; Step 3: Add the odorless agent, compatibilizer, antioxidant, light shielding agent, stabilizer, and coupling agent to the mixture in Step 2, continue stirring and reacting to obtain the final environmentally friendly odorless and instant high-viscosity asphalt mixture.

[0029] Example 4 The present invention provides an environmentally friendly odorless and instant high-viscosity asphalt, comprising the following components in parts by weight: The matrix asphalt is 90# asphalt; the rubber powder is C1 vulcanized rubber powder; the crosslinking agent is insoluble sulfur; the odorless agent is zinc ricinoleate; the compatibilizer is methylphenyl silicone oil; the antioxidant is SEBS linear triblock copolymer; the light shielding agent is carbon black; the stabilizer is modified graphene oxide; and the coupling agent is tetraethoxysilane.

[0030] The present invention provides a preparation method of an environmentally friendly odorless and instant high-viscosity asphalt, comprising the following steps: Step 1: Accurately weigh each raw material for standby according to the dosage ratio, including 70 parts of matrix asphalt, 20 parts of rubber powder, 5 parts of crosslinking agent, 6 parts of odorless agent, 5 parts of compatibilizer, 1 part of antioxidant, 2 parts of light shielding agent, 1 part of stabilizer, and 2 parts of coupling agent; Step 2: Stir and heat the matrix asphalt to 185°C to uniformly heat the matrix asphalt, add the rubber powder and crosslinking agent, stir evenly and shear and develop in a high-speed shearing device for 1 hour; Step 3: Add the odorless agent, compatibilizer, antioxidant, light shielding agent, stabilizer, and coupling agent to the mixture in Step 2, continue stirring and reacting to obtain the final environmentally friendly odorless instant high-viscosity asphalt mixture.

[0031] Example 5 The present invention provides an environmentally friendly odorless instant high-viscosity asphalt, comprising the following components in parts by weight: The matrix asphalt is 110# asphalt; the rubber powder is C1 vulcanized rubber powder; the crosslinking agent is insoluble sulfur; the odorless agent is ethoxystearamide; the compatibilizer is methyl ethoxysiloxane; the antioxidant is SEBS linear triblock copolymer; the light shielding agent is carbon black; the stabilizer is modified graphene oxide; and the coupling agent is silane coupling agent KH570;

[0032] The present invention provides a preparation method of an environmentally friendly odorless instant high-viscosity asphalt, comprising the following steps: Step 1: Accurately weigh each raw material for standby according to the dosage ratio, including 68 parts of matrix asphalt, 16 parts of rubber powder, 6 parts of crosslinking agent, 7 parts of odorless agent, 4 parts of compatibilizer, 2 parts of antioxidant, 4 parts of light shielding agent, 5 parts of stabilizer, and 5 parts of coupling agent; Step 2: Stir and heat the matrix asphalt to 185°C to uniformly heat the matrix asphalt, add the rubber powder and crosslinking agent, stir evenly and shear and develop in a high-speed shearing device for 1 hour; Step 3: Add the odorless agent, compatibilizer, antioxidant, light shielding agent, stabilizer, and coupling agent to the mixture in Step 2, continue stirring and reacting to obtain the final environmentally friendly odorless instant high-viscosity asphalt mixture.

[0033] Comparative Example 1: This comparative example is the same as Example 3, except that the odorless agent is not added; Comparative Example 2: This comparative example is the same as Example 3, except that the compatibility is not added; Comparative Example 3: This comparative example is the same as Example 3, except that the stabilizer is not added; Experimental results and performance analysis The asphalt mixtures prepared in multiple examples and comparative examples were tested, and the test results are shown in the following table.

[0034]

[0035] The test methods for the above asphalt test indexes are as follows:

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claim concerned. In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. A person skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. An environmentally friendly, odorless, instant, high-viscosity asphalt, characterized in that: The composition comprises the following components in parts by weight: 60-70 parts of base asphalt, 15-20 parts of rubber powder, 5-8 parts of cross-linking agent, 5-10 parts of deodorizing agent, 3-6 parts of compatibilizer, 1-3 parts of antioxidant, 2-4 parts of light shielding agent, 1-5 parts of stabilizer and 2-5 parts of coupling agent.

2. The environmentally friendly, odorless, instant, high-viscosity asphalt according to claim 1, characterized in that: The cross-linking agent is insoluble sulfur.

3. The environmentally friendly, odorless, instant, high-viscosity asphalt according to claim 1, characterized in that: The deodorant is one or more of zinc ricinoleate, ethoxy stearamide and zinc oxide.

4. The environmentally friendly, odorless, instant, high-viscosity asphalt according to claim 1, characterized in that: The compatibilizer is one or more of paraffin, tall oil, phenyl silicone oil, methylphenyl silicone oil, methylchlorophenyl silicone oil, and methylethoxy silicone oil.

5. The environmentally friendly, odorless, instant, high-viscosity asphalt according to claim 1, characterized in that: The anti-aging agent is a linear triblock copolymer with polystyrene as the terminal segment and ethylene-butene copolymer obtained by hydrogenating polybutadiene as the middle elastic block.

6. The environmentally friendly, odorless, fast-dissolving, high-viscosity asphalt according to claim 1, characterized in that: The light shielding agent is a black coating or carbon black.

7. The environmentally friendly, odorless, instant, high-viscosity asphalt according to claim 1, characterized in that: The stabilizer uses graphene oxide as a base material and zinc stearate as a modifier to prepare modified graphene oxide after surface modification.

8. The environmentally friendly, odorless, fast-dissolving, high-viscosity asphalt according to claim 1, characterized in that: The coupling agent is one or more of a silane coupling agent, a titanate coupling agent, and an aluminate coupling agent.

9. The environmentally friendly, odorless, fast-dissolving, high-viscosity asphalt according to claim 8, characterized in that: The coupling agent is one or more of silane coupling agent KH570, tetraethoxysilane, and chelate titanate coupling agent 311.

10. A method for preparing the environmentally friendly, odorless, fast-dissolving, high-viscosity asphalt according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, accurately weigh each raw material according to the usage ratio, 60-70 parts of base asphalt, 15-20 parts of rubber powder, 5-8 parts of cross-linking agent, 5-10 parts of deodorizing agent, 3-6 parts of compatibilizer, 1-3 parts of antioxidant, 2-4 parts of light shielding agent, 1-5 parts of stabilizer and 2-5 parts of coupling agent; Step 2: Stir and heat the base asphalt to 160°C-190°C to make the base asphalt evenly heated, add rubber powder and cross-linking agent, stir evenly and shear and develop in a high-speed shearing device for 1 hour; Step three, add deodorizer, compatibilizer, antioxidant, light shielding agent, stabilizer and coupling agent to the mixture in step two, continue stirring and reacting, and obtain the final environmentally friendly, deodorizing, instant and high-viscosity asphalt mixture.

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