CN117024981A - Rubber modified asphalt and its production and preparation process - Google Patents
Rubber modified asphalt and its production and preparation process Download PDFInfo
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- CN117024981A CN117024981A CN202311162987.2A CN202311162987A CN117024981A CN 117024981 A CN117024981 A CN 117024981A CN 202311162987 A CN202311162987 A CN 202311162987A CN 117024981 A CN117024981 A CN 117024981A
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- Prior art keywords
- asphalt
- modified asphalt
- rubber powder
- rubber
- mixing
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- 239000010426 asphalt Substances 0.000 title claims abstract description 170
- 238000004519 manufacturing process Methods 0.000 title abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 62
- 238000002156 mixing Methods 0.000 claims abstract description 44
- 239000011159 matrix material Substances 0.000 claims abstract description 31
- 239000003607 modifier Substances 0.000 claims abstract description 30
- 238000000227 grinding Methods 0.000 claims abstract description 28
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 18
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 26
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 10
- 239000003345 natural gas Substances 0.000 claims description 8
- 239000000084 colloidal system Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- -1 organic ester compound Chemical class 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 2
- 238000010008 shearing Methods 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 19
- 238000007599 discharging Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 239000003517 fume Substances 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000010692 aromatic oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
- C10C3/02—Working-up pitch, asphalt, bitumen by chemical means reaction
- C10C3/026—Working-up pitch, asphalt, bitumen by chemical means reaction with organic compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses rubber modified asphalt, which relates to the technical field of petrochemical industry, and comprises the following components of matrix asphalt, rubber powder, an asphalt modifier, an auxiliary agent and a cross-linking agent, wherein the production and preparation process steps of the rubber modified asphalt comprise: and (3) heat exchanging the matrix asphalt, adding the matrix asphalt, the rubber powder, the SBS modifier, the auxiliary agent and the crosslinking agent into a tubular mixer for stirring and mixing, shearing and grinding by a primary grinding device to obtain modified asphalt, and storing in a finished product tank. The invention has the advantages of simple process, convenient transportation, environmental protection and no pollution, meets the requirements of civilized production, and the produced rubber modified asphalt has stable performance, high safety and high yield.
Description
Technical Field
The invention relates to the technical field of petrochemical industry, in particular to rubber modified asphalt and a production and preparation process thereof.
Background
Rubber powder and a plurality of modifiers are added into matrix asphalt according to a certain proportion and different sequences, stirred and sheared with high intensity, and the rubber powder and the modifiers are uniformly dispersed in the asphalt for development reaction under the combined action of chemical energy, thermal energy and mechanical energy to form a stable rubber modified asphalt structure system; is an effective measure for improving the asphalt performance and realizing the recycling treatment of the waste rubber. Compared with the common asphalt, the rubber modified asphalt has obvious advantages in the aspect of road performance, and the concrete performances are as follows: the road noise is reduced, and the influence on residents is reduced; the pavement has high elasticity and restorability at high temperature, and the resistance of the pavement to fatigue cracks and reflection cracks is improved; the tire is thrown at low temperature, has certain elasticity, can increase the sliding resistance between the tire and the road surface, and improves the driving safety coefficient; meanwhile, the anti-skid and anti-dazzle surface is improved, the color contrast with the sign line is strong, the visibility of night driving is enhanced, and the safety of night driving is improved.
The process flow for producing the rubber modified asphalt by the traditional equipment is as follows:
the first step: asphalt modifier and plasticizer are mixed into matrix asphalt in a preset proportion, and heated and stirred to 190 ℃. And a second step of: mixing the rubber powder and the compound stabilizer, stirring and heating to 185-190 ℃. And a third step of: and (3) performing first shearing, shearing and uniformly stirring the auxiliary agent and the asphalt. Fourth step: adding a cross-linking agent, and carrying out cross-linking and stirring on the asphalt modifier, the rubber powder and the asphalt. Fifth step: and (3) carrying out secondary shearing and discharging, and shearing and stirring various auxiliary agents and asphalt in the loading process. At present, the traditional production equipment adopts a vertical reaction kettle for stirring and mixing, utilizes heat transfer oil for heat exchange, belongs to an intermittent production mode, has large volume and is immovable, and has great limitation.
Disclosure of Invention
The invention aims to solve the technical problem of providing rubber modified asphalt with stable product performance, and the production and preparation process which can realize continuous production and is suitable for mobile equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
the rubber modified asphalt comprises matrix asphalt, rubber powder, an asphalt modifier, an auxiliary agent and a cross-linking agent, wherein the asphalt modifier is an SBS modifier, and the weight portions of the components are as follows:
400+/-20 parts of matrix asphalt, 90-240 parts of rubber powder, 1-2 parts of SBS modifier, 0-2 parts of auxiliary agent and 0.5-1.5 parts of cross-linking agent.
Preferably, the matrix asphalt is 70#a grade road petroleum asphalt; the mesh number of the rubber powder is 24-40 mesh.
Preferably, the SBS modifier is a linear SBS modifier.
Preferably, the auxiliary agent is generally an organic ester compound or aromatic oil.
The invention also provides a production and preparation process of the rubber modified asphalt, which comprises the following steps:
1) Preheating asphalt and rubber powder: pumping the modified asphalt into an asphalt heat exchanger for heat exchange, heating to 185-200 ℃, and preheating rubber powder to 80-90 ℃:
2) Firstly starting a tubular mixer to stir and mix, then conveying preheated matrix asphalt and rubber powder into the tubular mixer, and simultaneously adding an SBS modifier, an auxiliary agent and a cross-linking agent;
3) The materials are mixed in a tubular mixer and then enter a primary grinding device to obtain modified asphalt;
4) Conveying the modified asphalt to a finished product tank for storage;
the modified asphalt pump, the asphalt heat exchanger, the tubular mixer, the primary grinding device and the finished product tank can be assembled and carried.
Preferably, in the step 4), when the rubber powder is 90-130 parts, the development time is not needed in a finished product tank, and the construction can be directly mixed; when 130-240 parts of rubber powder is used, the development time is correspondingly increased by 15-40 min in a finished product tank, and then the construction can be carried out by mixing.
Preferably, the asphalt heat exchanger used in the step 1) comprises a plurality of heating tanks which are connected in sequence, an asphalt pipeline for conveying asphalt is arranged in each heating tank, a first natural gas burner is arranged at the top of each heating tank, and a temperature sensor is arranged on a discharge pipe of each heating tank; the outlet of the discharge pipe of the heating tank is connected with the compressed air pipe and the blow-down pipe through three-way valves; the discharge pipe of the asphalt heat exchanger is connected with a preheated asphalt pump, and the discharge port of the preheated asphalt pump is connected with a pipeline for conveying matrix asphalt; the preheating asphalt pump and the asphalt heat exchanger are both arranged in the frame, and a central control chamber is also arranged in the frame and used for controlling the asphalt heat exchanger and the preheating asphalt pump.
Preferably, the tubular mixer used in the step 2) comprises a plurality of mixing barrels which are horizontally arranged, the mixing barrels are sequentially connected from top to bottom, and the discharge port of the upper mixing barrel is in butt joint with the feed port of the adjacent lower mixing barrel; the inner cavity of the mixing cylinder is provided with a spiral blade driven by a motor; the top mixing cylinder is provided with a matrix asphalt inlet, and a rubber powder, an SBS modifier, an auxiliary agent and a cross-linking agent inlet; the discharge hole of the bottom mixing cylinder is connected with a modified asphalt pump; the modified asphalt pump, the tubular mixer and the primary grinding device are all arranged on the mounting frame.
Preferably, in step 2), the rubber powder is added into the tubular mixer through the metering feeder, the helical blade in the metering feeder is of a hollow structure, and the helical blade is filled with a heating medium for preheating the rubber powder.
Preferably, the primary grinding device used in step 3) is a shear or colloid mill.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: compared with the prior art, the modified asphalt pump, the asphalt heat exchanger, the tubular mixer, the primary grinding device and the finished product tank which can be assembled and carried are utilized, the production equipment is compact in structure, suitable for moving production sites along with projects, capable of realizing continuous production, stable in the prepared rubber modified asphalt product, high in safety and large in yield, no harmful gas is generated in the whole production process, and the requirements of civilized production and environmental protection are met.
Drawings
FIG. 1 is a process flow diagram in an embodiment of the invention;
FIG. 2 is a schematic view of the asphalt heat exchanger of FIG. 1;
FIG. 3 is a schematic view of the tube mixer of FIG. 1;
FIG. 4 is a schematic view of the construction of the incinerator and media heat exchange apparatus of FIG. 1;
in the figure: 1-a modified asphalt pump; 2-asphalt heat exchanger; 3-a tubular mixer, 31-a first mixing cylinder, 32-a second mixing cylinder and 33-a third mixing cylinder; 4-a primary grinding device; 5-a finished product tank; 6-an incinerator; 7-a medium heat exchange device; 8-induced draft fan; 9-a rubber powder tank; 10-measuring a feeding machine; 11-an exhaust fan; 12-an oil pump; 13-a cabinet body; 14-a second natural gas burner; 15-an asphalt fume exhaust pipe; 16-a heat conducting oil outlet; 17-mounting frame; 18-a rubber powder inlet; 19-matrix asphalt inlet; 20-a modified asphalt output pipe; 22-heating the tank; 23-a first natural gas burner; 24-a temperature sensor; 25-a three-way valve; 26-a compressed air tube; 27-a blow-down pipe; 28-preheating an asphalt pump; 29-a frame; 30-a central control room; 34-compressed air inlet; 35-matrix asphalt inlet; 36-matrix asphalt outlet; 37-natural gas pipe; 38-natural gas inlet.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
The rubber modified asphalt comprises matrix asphalt, rubber powder, an asphalt modifier, an auxiliary agent and a cross-linking agent, wherein the asphalt modifier is an SBS modifier, and the weight portions of the components are as follows:
400+/-20 parts of matrix asphalt, 90-240 parts of rubber powder, 1-2 parts of SBS modifier, 0-2 parts of auxiliary agent and 0.5-1.5 parts of cross-linking agent.
Wherein, the matrix asphalt is 70# A grade road petroleum asphalt; the mesh number of the rubber powder is 24-40 mesh; the SBS modifier is a linear SBS modifier; the auxiliary agent is one of an organic ester compound or aromatic hydrocarbon oil. The rubber powder can be common rubber powder or pretreated rubber powder.
The invention also provides a production and preparation process of the rubber modified asphalt, which comprises the following steps:
1) Preheating asphalt and rubber powder: and (3) pumping the modified asphalt into an asphalt heat exchanger for heat exchange, heating to 185-200 ℃, and preheating the rubber powder to 80-90 ℃.
2) Firstly, starting a tubular mixer to stir and mix, then conveying preheated matrix asphalt and rubber powder into the tubular mixer, and simultaneously adding an SBS modifier, an auxiliary agent and a cross-linking agent to realize the full mixing of materials.
3) The materials are mixed in a tubular mixer and then enter a primary grinding device, so as to obtain the modified asphalt.
4) Conveying the modified asphalt to a finished product tank for storage; when the rubber powder is 90-130 parts, the development time is not needed in the finished product tank, and the construction can be directly mixed; when 130-240 parts of rubber powder is used, the development time is correspondingly increased by 15-40 min in a finished product tank, and then the construction can be carried out by mixing.
The primary grinding device used here is a shear or colloid mill.
The modified asphalt pump, the asphalt heat exchanger, the tubular mixer, the primary grinding device and the finished product tank can be assembled and carried, and are convenient to shift along with projects.
The specific parameter values of each batch in the rubber modified asphalt production process are shown in the following table.
Table one: parameter values of each batch in the production process of rubber powder modified asphalt
And (II) table: matrix asphalt heating temperature parameter value in asphalt heat exchanger
| Batch of | 1 | 2 | 3 | 4 | 5 |
| Heating temperature (. Degree. C.) | 185 | 190 | 200 | 190 | 200 |
The rubber modified asphalt production equipment used in the rubber modified asphalt production and preparation process comprises a modified asphalt pump 1, an asphalt heat exchanger 2, a tubular mixer 3, a primary grinding device 4, a finished product tank 5, an incinerator 6 and a medium heat exchange device 7 which can be assembled and carried, wherein a discharge port of the modified asphalt pump 1 is connected with a feed port of the asphalt heat exchanger 2, the tubular mixer 3 is provided with a feed port for adding rubber powder and various additives, the feed port of the tubular mixer 3 is connected with the discharge port of the asphalt heat exchanger 2, the discharge port of the tubular mixer 3 is connected with a feed port of the primary grinding device 4, and the discharge port of the primary grinding device 4 is connected with the finished product tank 5; the asphalt smoke discharge pipe of the finished product tank 5 is connected with the incinerator 6 through an induced draft fan 8, and a flue of the incinerator 6 penetrates through the medium heat exchange device 7 and is used for heat exchange between medium in the medium heat exchange device 7 and combusted smoke; the medium pipeline of the medium heat exchange device 7 penetrates through the discharging pipe of the asphalt heat exchanger 2 and is used for raising the temperature of asphalt secondarily to maintain the temperature of the asphalt entering the pipe mixer 3. Heating asphalt to a process required temperature by utilizing an asphalt heat exchanger, fully stirring and mixing asphalt, rubber powder and various additives by utilizing a tubular mixer, grinding the mixture by a grinding device again, and then entering a finished product tank for storage; after the asphalt fume of the finished product tank enters the incinerator to burn through the induced draft fan, the high-heat fume exchanges heat with the medium in the medium heat exchange device, the temperature of the matrix asphalt entering the tubular mixer is ensured to be between 180 ℃ and 200 ℃, and the fume after heat exchange is discharged through the flue after reaching the standard.
When the rubber powder is 90-130 parts, development time is not needed in the finished product tank; when the rubber powder is 130-240 parts, the development time of 15-40 min is correspondingly increased in the finished product tank, and the rubber powder can be used only through a secondary grinding device. The discharge port of the finished product tank 5 is connected with a secondary grinding device; the primary grinding device 4 and the secondary grinding device are a shearing machine or a colloid mill. If the equipment is used on a construction site, the equipment is directly fed into a mixture mixing building after passing through a secondary shearing machine; if the equipment is used in a factory, the equipment is loaded after the secondary shearing machine and then transported to a construction site.
As shown in fig. 2, the asphalt heat exchanger 2 includes a plurality of heating tanks 22 connected in sequence, an asphalt pipeline for conveying asphalt is arranged in the heating tanks 22, a first natural gas burner 23 is arranged at the top of the heating tanks 22, and a temperature sensor 24 is arranged on a discharge pipe of the heating tanks 22; the discharge port of the heating tank 22 is connected with a compressed air pipe 26 and a blow-down pipe 27 through a three-way valve 25. The specific structure of the asphalt heat exchanger is disclosed in the patent cn201910597492.X, and will not be described herein.
Wherein, the discharge port of the asphalt heat exchanger 2 is connected with a preheated asphalt pump 28, and the discharge port of the preheated asphalt pump 28 is connected with a pipeline for conveying matrix asphalt; the preheating asphalt pump 28 and the asphalt heat exchanger 2 are both arranged in a frame 29, and a central control room 30 is also arranged in the frame 29 and used for controlling the asphalt heat exchanger 2 and the preheating asphalt pump 28. Each part is integrated into the frame, so that the lifting and carrying are convenient, and the lifting and carrying device can be moved to any place along with the project.
Further, as shown in fig. 4, as a specific embodiment of the present invention, the medium heat exchange device 7 is a heat conduction oil furnace, a medium outlet pipe of the heat conduction oil furnace is connected to a medium inlet pipe in a discharging pipe of the asphalt heat exchanger 2 through an oil pump 12, and a medium outlet pipe in the discharging pipe of the asphalt heat exchanger 2 is connected to a medium inlet pipe of the heat conduction oil furnace. The incinerator 6 and the heat conduction oil furnace are both arranged in a transportable cabinet body 13, a second natural gas burner 14 is arranged at the bottom of the incinerator 6, and the inner cavity of the incinerator 6 is communicated with an asphalt smoke discharge pipe 15; the heat conduction oil furnace and the incinerator 6 are arranged in the cabinet body 13 in parallel, and the bottom of the heat conduction oil furnace is provided with an oil pump 12 and a heat conduction oil outlet 16; the flue of the incinerator 6 penetrates through the rear outlet of the heat conduction oil furnace and is connected with the exhaust fan 11. The incinerator and the heat conduction oil furnace are integrated into the cabinet body, so that the incinerator is convenient to hoist and transport, and can be moved to any place along with the project.
In order to facilitate rubber powder feeding, a rubber powder feeding device is arranged on the side face of a feeding hole of the tubular mixer 3, the rubber powder feeding device comprises a rubber powder tank 9 and a metering feeder 10, a feeding hole of the metering feeder 10 is connected with a bottom discharging hole of the rubber powder tank 9, and a discharging hole of the metering feeder 10 is connected with the feeding hole of the tubular mixer 3. And the rubber powder is conveyed to the tubular mixer by using the metering feeder, so that the device is convenient and quick, and the labor intensity of workers can be reduced.
Since the rubber powder needs to be preheated, further, the spiral blade of the metering feeder 10 can be designed to be of a hollow structure, and the inner cavity of the spiral blade is filled with a heating medium for preheating the rubber powder. The heat conduction oil can be input into the spiral blade, and the rubber powder is preheated by utilizing the heat of the heat conduction oil. Meanwhile, a metering module is arranged at a discharge port of the metering feeder 10, so that the feeding amount of rubber powder is conveniently metered; or a metering module is arranged at the feed inlet of the tubular mixer.
Further, referring to fig. 1 and 3, as a specific embodiment of the present invention, the tubular mixer 3 includes a plurality of mixing drums horizontally arranged, the plurality of mixing drums are sequentially connected from top to bottom, and a discharge port of an upper mixing drum is in butt joint with a feed port of an adjacent lower mixing drum; the inner cavity of the mixing cylinder is provided with a spiral blade driven by a motor, and the motor is arranged at the end part of the mixing cylinder; the discharge hole of the bottom mixing cylinder is connected with the modified asphalt pump 1. For convenient lifting and carrying, the modified asphalt pump 1, the tubular mixer 3 and the primary grinding device 4 can be arranged on the mounting frame 17, and the modified asphalt pump 1 and the primary grinding device 4 are arranged at the bottom of the side surface of the tubular mixer 3. In the embodiment shown in fig. 1 and 3, the number of mixing barrels is 3, in the figure, the mixing barrels are a first mixing barrel 31, a second mixing barrel 32 and a third mixing barrel 33 sequentially from top to bottom, a rubber powder inlet 18 and a matrix asphalt inlet 19 are arranged on the upper surface of the first mixing barrel 31, and a discharge hole of a primary grinding device 4 (a shearing machine) is connected with a modified asphalt output pipe 20. The additives are added through a rubber powder inlet, the matrix asphalt, the rubber powder and the additives are added in a first mixing cylinder, then the raw materials are uniformly mixed through a second mixing cylinder and a third mixing cylinder, and finally the mixture is output through a modified asphalt pump.
In summary, compared with the prior art, the production equipment has the advantages of compact structure and convenient carrying, the asphalt heat exchanger is arranged in the frame, the incinerator and the heat conduction oil furnace are arranged in the cabinet, the modified asphalt pump, the tubular mixer and the primary grinding device are arranged in the mounting frame, and the modular structure is convenient to hoist and carry and can also move along with the change of project places. The asphalt heat exchanger is utilized to heat the matrix asphalt, then the matrix asphalt enters the tubular mixer to be fully stirred and mixed with rubber powder and various additives, and the mixture enters a finished product tank to be stored, so that continuous production can be realized, the production efficiency can reach 30 tons/hour, and the power of the whole equipment is 200kw. The asphalt smoke of the finished product tank enters the incinerator for combustion, so that the standard emission is realized, and meanwhile, the waste heat of the smoke is reused through the heat conduction oil furnace, so that the purposes of energy saving, consumption reduction and environmental protection production are realized. The product produced by the equipment has stable performance, high safety and large yield, can move along with projects, and is convenient to popularize and apply.
In the foregoing description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed above.
Claims (10)
1. A rubber modified asphalt is characterized in that: the asphalt comprises matrix asphalt, rubber powder, an asphalt modifier, an auxiliary agent and a cross-linking agent, wherein the asphalt modifier is an SBS modifier, and the weight parts of the components are as follows:
400+/-20 parts of matrix asphalt, 90-240 parts of rubber powder, 1-2 parts of SBS modifier, 0-2 parts of auxiliary agent and 0.5-1.5 parts of cross-linking agent.
2. The rubber modified asphalt of claim 1, wherein: the matrix asphalt is 70# A grade road petroleum asphalt; the mesh number of the rubber powder is 24-40 mesh.
3. The rubber modified asphalt of claim 1, wherein: the SBS modifier is a linear SBS modifier or a star SBS modifier.
4. The rubber modified asphalt of claim 1, wherein: the auxiliary agent is an organic ester compound or aromatic hydrocarbon oil.
5. The process for producing a rubber-modified asphalt according to claim 1, comprising the steps of:
1) Preheating asphalt and rubber powder: pumping the modified asphalt into an asphalt heat exchanger for heat exchange, heating to 185-200 ℃, and preheating rubber powder to 80-90 ℃:
2) Firstly starting a tubular mixer for stirring, then conveying preheated matrix asphalt and rubber powder into the tubular mixer, and simultaneously adding an SBS modifier, an auxiliary agent and a cross-linking agent for stirring and mixing;
3) The materials are mixed in a tubular mixer and then enter a primary grinding device to obtain modified asphalt;
4) Conveying the modified asphalt to a finished product tank for storage;
the modified asphalt pump, the asphalt heat exchanger, the tubular mixer, the primary grinding device and the finished product tank can be assembled and carried, wherein the finished product tank is self-provided or is stored in a construction site.
6. The process for producing and preparing the rubber modified asphalt according to claim 5, wherein: in the step 4), when the rubber powder is 90-130 parts, development time is not needed in a finished product tank and the rubber powder is used for direct mixing construction; when 130-240 parts of rubber powder is used, the development time is correspondingly increased by 15-40 min in a finished product tank, and then the construction can be carried out by mixing.
7. The process for producing and preparing the rubber modified asphalt according to claim 5, wherein: the asphalt heat exchanger used in the step 1) comprises a plurality of heating tanks which are connected in sequence, an asphalt pipeline for conveying asphalt is arranged in each heating tank, a first natural gas burner is arranged at the top of each heating tank, and a temperature sensor is arranged on a discharge pipe of each heating tank; the outlet of the discharge pipe of the heating tank is connected with the compressed air pipe and the blow-down pipe through three-way valves; the discharge pipe of the asphalt heat exchanger is connected with a preheated asphalt pump, and the discharge port of the preheated asphalt pump is connected with a pipeline for conveying matrix asphalt; the preheating asphalt pump and the asphalt heat exchanger are both arranged in the frame, and a central control chamber is also arranged in the frame and used for controlling the asphalt heat exchanger and the preheating asphalt pump.
8. The process for producing and preparing the rubber modified asphalt according to claim 5, wherein: the tubular mixer used in the step 2) comprises a plurality of mixing barrels which are horizontally arranged, the mixing barrels are sequentially connected from top to bottom, and the discharge port of the upper mixing barrel is in butt joint with the feed port of the adjacent lower mixing barrel; the inner cavity of the mixing cylinder is provided with a spiral blade driven by a motor; the top mixing cylinder is provided with a matrix asphalt inlet, and a rubber powder, an SBS modifier, an auxiliary agent and a cross-linking agent inlet; the discharge hole of the bottom mixing cylinder is connected with a modified asphalt pump; the modified asphalt pump, the tubular mixer and the primary grinding device are all arranged on the mounting frame.
9. The process for producing and preparing the rubber modified asphalt according to claim 5, wherein: in the step 2), the rubber powder is added into a tubular mixer through a metering feeder, a spiral blade in the metering feeder is of a hollow structure, and a heating medium is filled in the spiral blade for preheating the rubber powder.
10. The process for producing and preparing the rubber modified asphalt according to claim 5, wherein: the primary grinding device used in step 3) is a shear or colloid mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162987.2A CN117024981A (en) | 2023-09-11 | 2023-09-11 | Rubber modified asphalt and its production and preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311162987.2A CN117024981A (en) | 2023-09-11 | 2023-09-11 | Rubber modified asphalt and its production and preparation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117024981A true CN117024981A (en) | 2023-11-10 |
Family
ID=88635537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311162987.2A Withdrawn CN117024981A (en) | 2023-09-11 | 2023-09-11 | Rubber modified asphalt and its production and preparation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117024981A (en) |
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2023
- 2023-09-11 CN CN202311162987.2A patent/CN117024981A/en not_active Withdrawn
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Application publication date: 20231110 |