High-viscosity high-elasticity composite modified asphalt
By adding specific viscosity enhanced additives and other modifiers to asphalt to form a high -viscosity and high bomb composite modified asphalt, the existing asphalt viscosity and lack of elasticity are solved, and its adhesion and durability significantly improved. The scope of application has been expanded.
Patent Information
- Application Number
- CN202411641591.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-01-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The viscosity of existing asphalt is relatively low and elastic, which limits its application range.
Using high -viscosity and high bomb composite modified asphalt, including matrix asphalt, viscosity enhanced auxiliary, plasticizer, waste gel powder, promotional agent and stabilizer. asphalt.
It has improved the adhesion and durability of asphalt, enhanced its resistance to water erosion, extended the service life of the road, and it is easier to build operations to expand the application field.
Smart Images
Figure CN119371835A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of asphalt, in particular to a high-viscosity and high-elasticity composite modified asphalt. Background Art
[0002] Asphalt is a dark brown complex mixture of hydrocarbons of different molecular weights and their non-metallic derivatives. It is a kind of high-viscosity organic liquid.
[0003] The properties of asphalt include: 1. Appearance: Asphalt is mostly in black semi-solid or liquid state with low surface gloss.
[0004] 2. Solubility: Soluble in organic solvents such as carbon disulfide and carbon tetrachloride, but insoluble in water, acetone, ether, etc.
[0005] 3. Density and melting point: The density is usually between 1.15 and 1.25 g / cm3. It has no fixed melting point, but has a certain softening point and flash point.
[0006] 4. Electrical properties: It is an insulator at room temperature and has good electrical insulation properties.
[0007] Asphalt application areas include: Road construction: Asphalt mixtures are widely used in paving highways, urban roads, airport runways and other transportation infrastructure. Its excellent durability and crack resistance enable asphalt pavement to withstand heavy traffic and adverse weather conditions.
[0008] Waterproof materials: Asphalt waterproofing membranes and coatings are widely used in waterproofing projects such as roofs, basements, tunnels, etc. With the acceleration of urbanization and the continuous development of the construction industry, the demand for asphalt waterproofing materials is also growing continuously.
[0009] Paint manufacturing: Asphalt paint is widely used in protective coatings for ships, bridges, storage tanks and other facilities due to its good corrosion resistance and weather resistance.
[0010] Other applications: In addition, asphalt is also used as an insulation material for cables and wires, and as a raw material for making various specifications of petroleum asphalt paper-based felt, asphalt waterproofing membranes and other products.
[0011] To sum up, asphalt, as an important building material and industrial raw material, plays an irreplaceable role in many fields.
[0012] However, the viscosity of asphalt in the prior art is relatively low and its elasticity is relatively general, which limits the application scope of asphalt.
[0013] Based on this, the present invention provides a high-viscosity and high-elastic composite modified asphalt to solve the corresponding problem, which can further improve the surface hardness of the recycled aluminum alloy. Summary of the invention
[0014] In view of the problems in the prior art, the present invention provides a high-viscosity and high-elastic composite modified asphalt.
[0015] The technical solution adopted by the present invention to solve the technical problem is: a high-viscosity and high-elastic composite modified asphalt, which comprises the following components by weight: 80-88 parts of base asphalt, 3-5 parts of viscosity enhancing agent, 1-2 parts of plasticizer, 6-8 parts of waste rubber powder, 1-1.5 parts of accelerator, 1-2 parts of stabilizer; The matrix asphalt is: 70# matrix asphalt; The plasticizer is triethyl phthalate.
[0016] As a further technical solution: the preparation method of the viscosity enhancing additive is: (1) First, add deionized water and trisodium phosphate into the reactor, stir and mix them evenly, then introduce inert gas into the reactor, exhaust the air in the reactor, adjust the temperature to 60°C, and keep warm; (2) Add styrene, acrylonitrile and modifier to acetone in sequence, stir and mix evenly to obtain a mixed dispersion; The mixed dispersion is added to the reactor in step (1), and then the initiator solution is added dropwise, the temperature is adjusted to 80°C, the mixture is stirred for 10 hours, cooled to room temperature, and then discharged, filtered, washed, and dried to obtain; The mixed dispersion and initiator solution had a mixing volume ratio of 5:1.
[0017] As a further technical solution: in step (1), the mass ratio of deionized water to trisodium phosphate is 100:3-5; The inert gas is nitrogen.
[0018] As a further technical solution: in step (2), the mass ratio of styrene, acrylonitrile, modifier and acetone is 2:1:5-6:40; The initiator solution is azobisisobutyronitrile solution.
[0019] As a further technical solution: the structural formula of the modifier is: .
[0020] As a further technical solution: the azobisisobutyronitrile solution is an azobisisobutyronitrile acetone solution; The mass fraction of the azobisisobutyronitrile is 5%.
[0021] As a further technical solution: the accelerator is a mixture of 2-mercaptobenzothiazole and dibenzothiazole disulfide; Among them, the mixing mass ratio of 2-mercaptobenzothiazole and dibenzothiazole disulfide is 3:1.
[0022] As a further technical solution: the stabilizer is a PN-2 type or HMD type stabilizer.
[0023] As a further technical solution: the waste rubber powder is waste tire powder.
[0024] Beneficial effects of the present invention: The composite modified asphalt prepared by the present invention has a higher viscosity, so that the prepared composite modified asphalt can have better adhesion and durability in road construction and maintenance, and due to the higher viscosity, the composite modified asphalt can better resist moisture erosion and extend the service life of the road. At the same time, the composite modified asphalt prepared by the present invention is easier to construct and operate, can meet the needs of different road construction conditions, and the application field has been greatly expanded.
[0025] When the viscosity enhancing agent is added to asphalt in the present invention, a certain swelling effect will occur under the action of the viscosity enhancing agent, which is helpful to form a new colloidal structure. In addition, the viscosity enhancing agent can form a network structure in the asphalt, and this network structure can significantly improve the elasticity and strength properties of the asphalt.
[0026] By introducing the viscosity enhancing agent, it can be evenly and stably distributed in the asphalt, which can effectively avoid the stratification, agglomeration or segregation of the prepared composite modified asphalt, greatly improve the stability of the composite modified asphalt, and also significantly improve its viscosity performance.
[0027] The viscosity enhancing additive can fully exert its unique properties in the composite modified asphalt, thereby improving the overall performance of the composite modified asphalt.
[0028] At the same time, some groups in the viscosity enhancing agent can also interact with the components in the asphalt to slow down the aging rate of the composite modified asphalt. The significant reduction in the aging rate can help extend the service life of the composite modified asphalt while maintaining its excellent elastic properties. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a flow chart for the preparation of a high-viscosity and high-elastic composite modified asphalt. DETAILED DESCRIPTION
[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.
[0031] A method for preparing high-viscosity and high-elastic composite modified asphalt includes: preparing materials, melting, heating and stirring, adding materials, heat-insulating and stirring, shearing, and obtaining a finished product; The raw materials were weighed according to the corresponding weight ratio, the base asphalt was heated to melt, and then the viscosity enhancing agent was added and stirred for 3 hours, then the temperature was raised to 175°C, and waste rubber powder and plasticizer were added, and the mixture was stirred for 40 minutes. Then the temperature was lowered to 155°C, the accelerator was added, and the mixture was stirred for 1 hour. Then, the mixture was sheared on a high-speed shearing machine for 40 minutes to obtain a composite modified asphalt.
[0032] The following are specific embodiments: Example
[0033] A high-viscosity and high-elastic composite modified asphalt, comprising the following components by weight: 80 parts of base asphalt, 3 parts of viscosity enhancing agent, 1 part of plasticizer, 6 parts of waste rubber powder, 1 part of accelerator, and 1 part of stabilizer; The base asphalt is: 70# base asphalt; the accelerator is a mixture of 2-mercaptobenzothiazole and dibenzothiazole disulfide; Among them, the mixing mass ratio of 2-mercaptobenzothiazole and dibenzothiazole disulfide is 3:1.
[0034] The stabilizer is PN-2 type.
[0035] Waste rubber powder is waste tire powder.
[0036] The plasticizer is triethyl phthalate.
[0037] The preparation method of the viscosity enhancing additive is as follows: (1) First, add deionized water and trisodium phosphate into the reactor, stir and mix them evenly, then introduce inert gas into the reactor, exhaust the air in the reactor, adjust the temperature to 60°C, and keep warm; the mass ratio of deionized water to trisodium phosphate is 100:3; The inert gas is nitrogen.
[0038] (2) Add styrene, acrylonitrile and modifier to acetone in sequence, stir and mix evenly to obtain a mixed dispersion; The mixed dispersion is added to the reactor in step (1), and then the initiator solution is added dropwise, the temperature is adjusted to 80°C, the mixture is stirred for 10 hours, cooled to room temperature, and then discharged, filtered, washed, and dried to obtain; The mixed dispersion and initiator solution have a mixing volume ratio of 5:1; the mass ratio of styrene, acrylonitrile, modifier and acetone is 2:1:5:40; The initiator solution is azobisisobutyronitrile solution.
[0039] The structural formula of the modifier is: .
[0040] The azobisisobutyronitrile solution is azobisisobutyronitrile acetone solution; The mass fraction of the azobisisobutyronitrile is 5%. Example
[0041] A high-viscosity and high-elastic composite modified asphalt, comprising the following components by weight: 82 parts of base asphalt, 4 parts of viscosity enhancing agent, 1.5 parts of plasticizer, 7 parts of waste rubber powder, 1.2 parts of accelerator, and 1.5 parts of stabilizer; The base asphalt is: 70# base asphalt; the accelerator is a mixture of 2-mercaptobenzothiazole and dibenzothiazole disulfide; Among them, the mixing mass ratio of 2-mercaptobenzothiazole and dibenzothiazole disulfide is 3:1.
[0042] The stabilizer is PN-2 type.
[0043] Waste rubber powder is waste tire powder.
[0044] The plasticizer is triethyl phthalate.
[0045] The preparation method of the viscosity enhancing additive is as follows: (1) First, add deionized water and trisodium phosphate into the reactor, stir and mix them evenly, then introduce inert gas into the reactor, exhaust the air in the reactor, adjust the temperature to 60°C, and keep warm; the mass ratio of deionized water to trisodium phosphate is 100:3.5; The inert gas is nitrogen.
[0046] (2) Add styrene, acrylonitrile and modifier to acetone in sequence, stir and mix evenly to obtain a mixed dispersion; The mixed dispersion is added to the reactor in step (1), and then the initiator solution is added dropwise, the temperature is adjusted to 80°C, the mixture is stirred for 10 hours, cooled to room temperature, and then discharged, filtered, washed, and dried to obtain; The mixed dispersion and initiator solution have a mixing volume ratio of 5:1; the mass ratio of styrene, acrylonitrile, modifier and acetone is 2:1:5.5:40; The initiator solution is azobisisobutyronitrile solution.
[0047] The structural formula of the modifier is: .
[0048] The azobisisobutyronitrile solution is azobisisobutyronitrile acetone solution; The mass fraction of the azobisisobutyronitrile is 5%. Example
[0049] A high-viscosity and high-elastic composite modified asphalt, comprising the following components by weight: 88 parts of base asphalt, 5 parts of viscosity enhancing agent, 2 parts of plasticizer, 8 parts of waste rubber powder, 1.5 parts of accelerator, and 2 parts of stabilizer; The base asphalt is: 70# base asphalt; the accelerator is a mixture of 2-mercaptobenzothiazole and dibenzothiazole disulfide; Among them, the mixing mass ratio of 2-mercaptobenzothiazole and dibenzothiazole disulfide is 3:1.
[0050] The stabilizer is PN-2 type.
[0051] Waste rubber powder is waste tire powder.
[0052] The plasticizer is triethyl phthalate.
[0053] The preparation method of the viscosity enhancing additive is as follows: (1) First, add deionized water and trisodium phosphate into the reactor, stir and mix them evenly, then introduce inert gas into the reactor, exhaust the air in the reactor, adjust the temperature to 60°C, and keep warm; the mass ratio of deionized water to trisodium phosphate is 100:5; The inert gas is nitrogen.
[0054] (2) Add styrene, acrylonitrile and modifier to acetone in sequence, stir and mix evenly to obtain a mixed dispersion; The mixed dispersion is added to the reactor in step (1), and then the initiator solution is added dropwise, the temperature is adjusted to 80°C, the mixture is stirred for 10 hours, cooled to room temperature, and then discharged, filtered, washed, and dried to obtain; The mixed dispersion and initiator solution have a mixing volume ratio of 5:1; the mass ratio of styrene, acrylonitrile, modifier and acetone is 2:1:6:40; The initiator solution is azobisisobutyronitrile solution.
[0055] The structural formula of the modifier is: .
[0056] The azobisisobutyronitrile solution is azobisisobutyronitrile acetone solution; The mass fraction of the azobisisobutyronitrile is 5%.
[0057] Comparative Example 1: On the basis of Example 1, no viscosity enhancing agent is added, and the rest of the technical scheme remains unchanged.
[0058] Comparative Example 2: On the basis of Example 1, no waste rubber powder is added and the rest of the technical scheme remains unchanged.
[0059] Comparative Example 3: On the basis of Example 1, no stabilizer is added and the rest of the technical solutions remain unchanged.
[0060] Comparative Example 4: On the basis of Example 1, no accelerant is added and the rest of the technical scheme remains unchanged.
[0061] test The performance of the composite modified asphalt of the embodiment and the comparative example samples was tested in accordance with the "Experimental Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" JTGE20-2011. The test results are shown in Table 1, Table 2, and Table 3: Table 1
[0062] It can be seen from Table 1 that the modified asphalt prepared by the present invention has higher elastic properties.
[0063] The dynamic viscosity of the samples of the embodiment and the comparative example was tested, as shown in Table 2; Table 2
[0064] It can be seen from Table 2 that the composite modified asphalt prepared by the present invention has a higher dynamic viscosity.
[0065] The kinematic viscosity of the samples of the embodiment and the comparative example was tested, as shown in Table 3; Table 3
[0066] It can be seen from Table 3 that the modified asphalt prepared by the present invention has a lower kinematic viscosity.
[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-viscosity and high-elastic composite modified asphalt, characterized in that: The following ingredients are included by weight: 80-88 parts of base asphalt, 3-5 parts of viscosity enhancing agent, 1-2 parts of plasticizer, 6-8 parts of waste rubber powder, 1-1.5 parts of accelerator, 1-2 parts of stabilizer; The matrix asphalt is: 70# matrix asphalt; The plasticizer is triethyl phthalate.
2. The high-viscosity and high-elastic composite modified asphalt according to claim 1, characterized in that: The preparation method of the viscosity enhancing auxiliary agent is: (1) First, add deionized water and trisodium phosphate into the reactor, stir and mix them evenly, then introduce inert gas into the reactor, exhaust the air in the reactor, adjust the temperature to 60° C., and keep warm; (2) adding styrene, acrylonitrile and a modifier to acetone in sequence, stirring and mixing evenly to obtain a mixed dispersion; The mixed dispersion is added to the reactor in step (1), and then the initiator solution is added dropwise, the temperature is adjusted to 80° C., the mixture is stirred for 10 hours, cooled to room temperature, and then discharged, filtered, washed, and dried to obtain; The mixed dispersion and initiator solution had a mixing volume ratio of 5:
1.
3. The high-viscosity and high-elastic composite modified asphalt according to claim 2, characterized in that: In step (1), the mass ratio of deionized water to trisodium phosphate is 100:3-5; The inert gas is nitrogen.
4. The high-viscosity and high-elastic composite modified asphalt according to claim 2, characterized in that: In step (2), the mass ratio of styrene, acrylonitrile, modifier and acetone is 2:1:5-6:40; The initiator solution is azobisisobutyronitrile solution.
5. The high-viscosity and high-elastic composite modified asphalt according to claim 4, characterized in that: The structural formula of the modifier is:
6. The high-viscosity and high-elastic composite modified asphalt according to claim 4, characterized in that: The azobisisobutyronitrile solution is an azobisisobutyronitrile acetone solution; The mass fraction of the azobisisobutyronitrile is 5%.
7. The high-viscosity and high-elastic composite modified asphalt according to claim 1, characterized in that: The accelerator is a mixture of 2-mercaptobenzothiazole and dibenzothiazole disulfide; Among them, the mixing mass ratio of 2-mercaptobenzothiazole and dibenzothiazole disulfide is 3:
1.
8. The high-viscosity and high-elastic composite modified asphalt according to claim 7, characterized in that: The stabilizer is a PN-2 type or HMD type stabilizer.
9. The high-viscosity and high-elastic composite modified asphalt according to claim 1, characterized in that: The waste rubber powder is waste tire powder.