CN105316991B - A kind of process units of warm-mixed asphalt - Google Patents
A kind of process units of warm-mixed asphalt Download PDFInfo
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- CN105316991B CN105316991B CN201510256916.8A CN201510256916A CN105316991B CN 105316991 B CN105316991 B CN 105316991B CN 201510256916 A CN201510256916 A CN 201510256916A CN 105316991 B CN105316991 B CN 105316991B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a kind of process units of warm-mixed asphalt, and wherein the raw material components of warm-mixed asphalt are 70# matrix pitch or SBS pitch and warm mix modifying agent and other additives.The warm-mixed asphalt the preparation method comprises the following steps: matrix pitch is preheated, modifying agent is added under 140 DEG C of constant temperature, is stirred at low speed to obtain warm-mixed asphalt with machine；The process units of warm-mixed asphalt, including pitch preheating can, constant temperature agitator tank, bituminous pitch storing tank, electric machine control system, wherein pitch is preheated and is stirred through pitch preheating can, at 140 DEG C of constant temperature, through pressure system by asphalt delivery to agitator tank, warm mix modifying agent is added, continues to stir, until obtaining warm-mixed asphalt, resulting warm-mixed asphalt is finally delivered to bituminous pitch storing tank.Warm-mixed asphalt provided by the invention can obviously reduce the discharge amount of the pollutants such as dust, discarded, and construction temperature is lower, and asphalt production device structure provided by the invention is simple, at low cost, i.e. guarantee production requirement, and energy saving.
Description
Technical field
The invention belongs to asphalt modification technical field more particularly to a kind of warm-mixed asphalts and its process units.
Background technique
Bituminous pavement is a kind of high class pavement (including sub-high class pavement) being the most widely used in road construction, is in mine
Various types of road surfaces of bitumen for road use material making are mixed in material；Asphalt binder is improved to pave the way to be resisted with pellet and be gone
The ability of vehicle and the damage of natural cause road pavement, makes evenness of road surface lack dirt, waterproof, durable；And existing bituminous pavement paving
If required asphalt mostly uses hot-mix asphalt mixture, production, construction temperature are high, therefore waste thermal energy, pollute ring
Border is serious, and it is inconvenient to construct.
Summary of the invention
The purpose of the present invention is to provide a kind of warm-mixed asphalt and its process units, it is desirable to provide a kind of structure is simply real
With can reduce production and construction temperature, therefore saving heat energy, reduce environmental and production cost, and bring construction just
The warm-mixed asphalt and its process units of benefit.
The invention is realized in this way a kind of process units of warm-mixed asphalt, the process units of the warm-mixed asphalt include
Pitch preheating can, feed proportioning system, screw conveyor, high-shear emulsion machine, constant temperature agitator tank, bituminous pitch storing tank and motor control system
System；
The pitch preheating can is connect by feed proportioning system with screw conveyor, high-shear emulsion machine, high-shear emulsion machine
It is connect with constant temperature agitator tank, the asphalt delivery of the stirred completion of constant temperature agitator tank is into bituminous pitch storing tank.
Further, the pitch preheating can further includes weighing scale device and stirring system；
Filter screen is provided in the middle part of the tank body of the pitch preheating can；
The bituminous pitch storing tank includes shell, insulating layer, heating liner, liner, pitch injection pipe, pitch delivery line and rotation
System is disposed with insulating layer and heating liner between shell and liner, the top of liner is arranged in pitch injection pipe, and pitch is led
Outlet pipe is arranged below liner, and rotary system is connect with liner；
The liner is provided with rotary shaft and device for monitoring temperature；The liner is provided with the wake turbulence plate from agitating function；
The wake turbulence plate is 2-4 be evenly distributed in liner；The heating method of the heating liner is that heating rod or electromagnetic coil add
Heat.
Further, the feed proportioning system includes:
Multiple feed bins, each feed bin is for holding a kind of raw material in the multiple feed bin；
The feeding valve that the bottom of each feed bin is set and is connected with each feed bin, it is described every for exporting
The raw material held in a feed bin；
The first meausring apparatus being connected with the feeding valve, for claiming to the raw material of each feed bin output
Amount；
The discharge port of first meausring apparatus is set, is exported for raw material therein will to be entered；
The feeding device being connected with the discharge port, feedstock transportation for exporting the discharge port to Downstream processing
Device；
The controller being connected respectively with the feeding valve, first meausring apparatus, for according to default ingredient inventory
Determination need to configure the preset weight value of raw material type and every kind of raw material, and it is clear until obtaining the ingredient to repeat following steps
It is all in list to configure raw material:
Control need to configure the feeding valve of the corresponding feed bin of a certain raw material type in raw material type to first meausring apparatus
Export the raw material that wherein holds, and by first meausring apparatus to the pre- of weight value and the raw material after the raw material weighing
If weight value compares, the feeding valve is controlled when the two is consistent and stops output.
Further, the feeding valve is pneumatic stopping valve；
The feed proportioning system further include:
Programmable controller, for the controller to be connected with the first meausring apparatus, the feeding valve respectively；Setting
The second meausring apparatus between the discharge port and the feeding device；
Second meausring apparatus is connected with the controller, for it is all according to the resourcing manifest from multiple institutes
The total weight for stating the plurality of raw materials exported in feed bin is weighed and exports gross weight magnitude；
The discharge valve that second meausring apparatus bottom is set and is connected with second meausring apparatus；
The total weight is compared by the controller with the total weight in the default ingredient inventory, when the two is consistent
When control the discharge valve plurality of raw materials be output to the feeding device, the discharge valve is controlled when the two is inconsistent
The plurality of raw materials is abandoned into processing；
Scrap device with what the discharge valve was connected, for the discharge valve is abandoned the plurality of raw materials of processing into
Row scraps processing.
The quantity of first meausring apparatus be it is multiple, be connected respectively with one or more feeding valves；
The human-computer interaction device being connected with the controller, for receiving and exporting the default original to the controller
Expect inventory.
Further, the screw conveyor includes rack, driving mechanism, transport tube, helical axis, conveyor screw, head transmission
Bearing box and aft drive shaft hold box, and rack supports transport tube, and transport tube is equipped with feed inlet and outlet, and driving mechanism drives transport tube
Interior conveyor screw, the transport tube end are equipped with flange bracket, the helical axis of flange bracket support helix axis body, head drive shaft
It holds box and aft drive shaft holds the outside that box is located at conveyor screw both ends；
The flange bracket is equipped with the nylon bearing set of support helix axis.
Further, the high-shear emulsion machine includes: motor, Double-output-shaft gear box, center agitating paddle, outer stirring
Paddle, emulsion tank, the emulsion tank are cylindrical structure, and cover board is equipped at the top of emulsion tank, and cover board center upside is equipped with double output shaft
Gear-box, Double-output-shaft gear box top are connected with motor, and Double-output-shaft gear box is passed using the two-stage gear of interior external toothing
Dynamic or Planetary Gear Transmission, Double-output-shaft gear box is interior to be equipped with center input shaft, outer output shaft, and center output shaft passes through fixed pin
Fastening is connect with central stirring shaft, outer output shaft is fastened by fixed pin and outer stirring axis connection, central stirring shaft and outer stirring
Axis lower end passes through cover board and extend into inside emulsion tank, and center agitating paddle is equipped in central stirring shaft, is passed through on outer agitating shaft solid
Fixed hoop is equipped with outer agitating paddle, and central stirring shaft and outer agitating shaft lower end are mounted on bottom bracket；It is solid to emulsify pot bottom nozzle
Dingan County is equipped with emulsification shearing net.
Further, it is connected between the central stirring shaft and bottom bracket by center rotor；
It is connected between the outer agitating shaft and bottom bracket by outer rotor, outer rotor is mounted on bottom bracket by stator
On；
The central stirring shaft is equipped with 2-5 center agitating paddle；
The outer agitating shaft is equipped with 2-5 outer agitating paddles.
Another object of the present invention is to provide a kind of warm-mixed asphalt, the raw material components of the warm-mixed asphalt are 70# base
Matter pitch or SBS pitch and warm mix modifying agent and other additives；The pitch includes following components and mass percent
Content are as follows: saturation component 21.15%~23.43%, aromatised fraction 32.26%~46.00%, colloid 21.64%~
33.73%, asphalitine 7.96%~10.83%；The softening point of the pitch is 99.5 DEG C~101.4 DEG C；It is described
Warm mix modifying agent be synthesis straight-chain aliphatic hydrocarbon or polyolefins asphalt modifier.
Further, other described additives are eliminating smell agent, fumet, compatilizer, oxygenated pigment；The 70# matrix
The optimum oil-stone ratio of asphalt is 4.6%~4.7%.
Further, the optimum oil-stone ratio of the SBS asphalt is 6.1%~6.2%%；The compatilizer is
High molecular weight compatibilizer containing epoxy group；The weight of the eliminating smell agent and fumet is the 1% and 0.5% of matrix pitch；
The warm-mixed asphalt the preparation method comprises the following steps:
(1) modifying agent and additive are uniformly mixed, at 120 DEG C, reaction mixing 30min, is changed in mixer
Property compound, obtains modified composite particle after mechanical pelleting；
(2) matrix pitch is heated to 140 DEG C, is slowly added to modified composite particle, under steady temperature, use high speed shear
Mulser shears 45min, and control cutter revolving speed is 3500~4500r/min, is subsequently placed under blender and stirs at low speed
Warm-mixed asphalt is prepared in 30min.
Effect summarizes
Warm-mixed asphalt provided by the invention can obviously reduce the discharge amount of the pollutants such as dust, discarded, and construction technology is simple
Convenient, construction temperature is lower, and asphalt production device structure provided by the invention is simple, at low cost, i.e. guarantee production requirement, and saves
The about energy.
Detailed description of the invention
Fig. 1 is the schematic diagram of warm-mixed asphalt process units provided in an embodiment of the present invention；
Fig. 2 is the liner schematic diagram of process units provided by the invention；
In figure: 1, pitch preheating can；2, screw conveyor；3, high-shear emulsion machine；4, constant temperature agitator tank；5, bituminous pitch storing
Tank；5-1, shell；5-2, insulating layer；5-3, heating liner；5-4, liner；5-5, pitch injection pipe；5-6, pitch delivery line；5-
7, rotary system.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment 1, the invention is realized in this way, a kind of warm-mixed asphalt, which is characterized in that the original of the warm-mixed asphalt
Material group is divided into 70# matrix pitch or SBS pitch and warm mix modifying agent and other additives.
Further, the pitch includes following components and mass percentage content are as follows: and saturation 21.15 % of component~
23.43%, aromatised fraction 32.26%~46.00%, colloid 21.64%~33.73%, 7.96 %~10.83% of asphalitine.
Further, the softening point of the pitch is 99.5 DEG C~101.4 DEG C.
Further, the warm mix modifying agent is synthesis straight-chain aliphatic hydrocarbon or polyolefins asphalt modification
Agent.
Further, other described additives are eliminating smell agent, fumet, compatilizer, oxygenated pigment.
Further, the optimum oil-stone ratio of the 70# matrix pitch compound is 4.6%~4.7%.
Further, the optimum oil-stone ratio of the SBS asphalt is 6.1%~6.2%%.
Further, the compatilizer is the high molecular weight compatibilizer containing epoxy group.
Further, the weight of the eliminating smell agent and fumet is the 1% and 0.5% of matrix pitch.
Further, the feed proportioning system includes:
Multiple feed bins, each feed bin is for holding a kind of raw material in the multiple feed bin；
The feeding valve that the bottom of each feed bin is set and is connected with each feed bin, it is described every for exporting
The raw material held in a feed bin；
The first meausring apparatus being connected with the feeding valve, for claiming to the raw material of each feed bin output
Amount；
The discharge port of first meausring apparatus is set, is exported for raw material therein will to be entered；
The feeding device being connected with the discharge port, feedstock transportation for exporting the discharge port to Downstream processing
Device；
The controller being connected respectively with the feeding valve, first meausring apparatus, for according to default ingredient inventory
Determination need to configure the preset weight value of raw material type and every kind of raw material, and it is clear until obtaining the ingredient to repeat following steps
It is all in list to configure raw material:
Control need to configure the feeding valve of the corresponding feed bin of a certain raw material type in raw material type to first meausring apparatus
Export the raw material that wherein holds, and by first meausring apparatus to the pre- of weight value and the raw material after the raw material weighing
If weight value compares, the feeding valve is controlled when the two is consistent and stops output.
Further, the feeding valve is pneumatic stopping valve；
The feed proportioning system further include:
Programmable controller, for the controller to be connected with the first meausring apparatus, the feeding valve respectively；Setting
The second meausring apparatus between the discharge port and the feeding device；
Second meausring apparatus is connected with the controller, for it is all according to the resourcing manifest from multiple institutes
The total weight for stating the plurality of raw materials exported in feed bin is weighed and exports gross weight magnitude；
The discharge valve that second meausring apparatus bottom is set and is connected with second meausring apparatus；
The total weight is compared by the controller with the total weight in the default ingredient inventory, when the two is consistent
When control the discharge valve plurality of raw materials be output to the feeding device, the discharge valve is controlled when the two is inconsistent
The plurality of raw materials is abandoned into processing；
Scrap device with what the discharge valve was connected, for the discharge valve is abandoned the plurality of raw materials of processing into
Row scraps processing.
The quantity of first meausring apparatus be it is multiple, be connected respectively with one or more feeding valves；
The human-computer interaction device being connected with the controller, for receiving and exporting the default original to the controller
Expect inventory.
Further, the screw conveyor includes rack, driving mechanism, transport tube, helical axis, conveyor screw, head transmission
Bearing box and aft drive shaft hold box, and rack supports transport tube, and transport tube is equipped with feed inlet and outlet, and driving mechanism drives transport tube
Interior conveyor screw, the transport tube end are equipped with flange bracket, the helical axis of flange bracket support helix axis body, head drive shaft
It holds box and aft drive shaft holds the outside that box is located at conveyor screw both ends；
The flange bracket is equipped with the nylon bearing set of support helix axis.
Further, the high-shear emulsion machine includes: motor, Double-output-shaft gear box, center agitating paddle, outer stirring
Paddle, emulsion tank, the emulsion tank are cylindrical structure, and cover board is equipped at the top of emulsion tank, and cover board center upside is equipped with double output shaft
Gear-box, Double-output-shaft gear box top are connected with motor, and Double-output-shaft gear box is passed using the two-stage gear of interior external toothing
Dynamic or Planetary Gear Transmission, Double-output-shaft gear box is interior to be equipped with center input shaft, outer output shaft, and center output shaft passes through fixed pin
Fastening is connect with central stirring shaft, outer output shaft is fastened by fixed pin and outer stirring axis connection, central stirring shaft and outer stirring
Axis lower end passes through cover board and extend into inside emulsion tank, and center agitating paddle is equipped in central stirring shaft, is passed through on outer agitating shaft solid
Fixed hoop is equipped with outer agitating paddle, and central stirring shaft and outer agitating shaft lower end are mounted on bottom bracket；It is solid to emulsify pot bottom nozzle
Dingan County is equipped with emulsification shearing net.
Further, it is connected between the central stirring shaft and bottom bracket by center rotor；
It is connected between the outer agitating shaft and bottom bracket by outer rotor, outer rotor is mounted on bottom bracket by stator
On；
The central stirring shaft is equipped with 2-5 center agitating paddle；
The outer agitating shaft is equipped with 2-5 outer agitating paddles.
Embodiment 2, warm-mixed asphalt of the present invention the preparation method comprises the following steps:
(1) modifying agent and additive are uniformly mixed, at 120 DEG C, reaction mixing 30min, is changed in mixer
Property compound, obtains modified composite particle after mechanical pelleting；
(2) matrix pitch is heated to 140 DEG C, is slowly added to modified composite particle, under steady temperature, use high speed shear
Mulser shears 45min, and control cutter revolving speed is 3500~4500r/min, is subsequently placed under blender and stirs at low speed
Warm-mixed asphalt is prepared in 30min.
Embodiment 3, Fig. 1 show the structure of process units provided by the invention, and Fig. 2 shows liners in this process units
Structure, as shown, being used to prepare the process units of warm-mixed asphalt described in claim 1, which is characterized in that the life
Producing device includes pitch preheating can 1, feed proportioning system, screw conveyor 2, high-shear emulsion machine 3, constant temperature agitator tank 4, bituminous pitch storing
Tank 5 and electric machine control system, wherein pitch preheating can 1 is connected by feed proportioning system and screw conveyor 2, high-shear emulsion machine 3
It connects, high-shear emulsion machine 3 is connect with constant temperature agitator tank 4, and constant temperature agitator tank 4 stirs the asphalt delivery completed to bituminous pitch storing tank
In 5.
Further, the pitch preheating can 1 further includes weighing scale device and stirring system.
Further, filter screen is provided in the middle part of the tank body of the pitch preheating can 1.
Further, the bituminous pitch storing tank 5 includes shell 5-1, insulating layer 5-2, heating liner 5-3, liner 5-4, pitch
Injection pipe 5-5, pitch delivery line 5-6 and rotary system 5-7, wherein heat preservation is disposed between shell 5-1 and liner 5-4
The top of liner 5-4 is arranged in layer 5-2 and heating liner 5-3, pitch injection pipe 5-5, and pitch delivery line 5-6 is arranged in liner 5-4
Lower section, rotary system 5-7 are connect with liner 5-4.
Further, the liner 5-4 is provided with rotary shaft and device for monitoring temperature.
Further, the liner 5-4 is provided with the wake turbulence plate from agitating function.
Further, the wake turbulence plate is 2-4 be evenly distributed in liner.
Further, the heating method of the heating liner 5-3 is that heating rod or electromagnetic coil heat.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
The various modifications or changes that needing to pay creative labor can make are still fallen within the protection scope of the present invention.
Claims (3)
1. a kind of process units of warm-mixed asphalt, which is characterized in that the process units of the warm-mixed asphalt include pitch preheating can,
Feed proportioning system, screw conveyor, high-shear emulsion machine, constant temperature agitator tank, bituminous pitch storing tank and electric machine control system；
The pitch preheating can is connect by feed proportioning system with screw conveyor, high-shear emulsion machine, high-shear emulsion machine and perseverance
Warm agitator tank connection, the asphalt delivery of the stirred completion of constant temperature agitator tank is into bituminous pitch storing tank；
The pitch preheating can further includes weighing scale device and stirring system；
Filter screen is provided in the middle part of the tank body of the pitch preheating can；
The bituminous pitch storing tank includes shell, insulating layer, heating liner, liner, pitch injection pipe, pitch delivery line and rotation system
System, is disposed with insulating layer and heating liner between shell and liner, the top of liner, pitch export is arranged in pitch injection pipe
Pipe is arranged below liner, and rotary system is connect with liner；
The liner is provided with rotary shaft and device for monitoring temperature；The liner is provided with the wake turbulence plate from agitating function；It is described
Wake turbulence plate is 2-4 be evenly distributed in liner；The heating method of the heating liner is that heating rod or electromagnetic coil heat；
The feed proportioning system includes:
Multiple feed bins, each feed bin is for holding a kind of raw material in the multiple feed bin；
The feeding valve that the bottom of each feed bin is set and is connected with each feed bin, for exporting each material
The raw material held in storehouse；
The first meausring apparatus being connected with the feeding valve, for being weighed to the raw material of each feed bin output；
The discharge port of first meausring apparatus is set, is exported for raw material therein will to be entered；
The feeding device being connected with the discharge port, the feedstock transportation for exporting the discharge port are filled to Downstream processing
It sets；
The controller being connected respectively with the feeding valve, first meausring apparatus, for determining according to ingredient inventory is preset
The preset weight value of raw material type and every kind of raw material need to be configured, and repeats following steps until obtaining in the ingredient inventory
It is all to configure raw material:
The feeding valve that control need to configure the corresponding feed bin of a certain raw material type in raw material type is exported to first meausring apparatus
The raw material wherein held, and by first meausring apparatus to the default weight of weight value and the raw material after the raw material weighing
Magnitude compares, and the feeding valve is controlled when the two is consistent and stops output；
The feeding valve is pneumatic stopping valve；The feed proportioning system further include:
Programmable controller, for the controller to be connected with the first meausring apparatus, the feeding valve respectively；Setting is in institute
State the second meausring apparatus between discharge port and the feeding device；
Second meausring apparatus is connected with the controller, for it is all according to the resourcing manifest from multiple material
The total weight of the plurality of raw materials exported in storehouse is weighed and exports gross weight magnitude；
The discharge valve that second meausring apparatus bottom is set and is connected with second meausring apparatus；
The total weight is compared by the controller with the total weight in the default ingredient inventory, when the consistent time control of the two
It makes the discharge valve and the plurality of raw materials is output to the feeding device, the discharge valve is controlled when the two is inconsistent by institute
It states plurality of raw materials and abandons processing；
Device is scrapped with what the discharge valve was connected, the plurality of raw materials for abandoning processing to the discharge valve is reported
Useless processing；
The quantity of first meausring apparatus be it is multiple, be connected respectively with one or more feeding valves；
The human-computer interaction device being connected with the controller is clear for receiving and exporting the default raw material to the controller
It is single.
2. the process units of warm-mixed asphalt as described in claim 1, which is characterized in that the screw conveyor include rack,
Driving mechanism, transport tube, helical axis, conveyor screw, head drive shaft hold box and aft drive shaft holds box, and rack supports transport tube,
Transport tube is equipped with feed inlet and outlet, and driving mechanism drives the conveyor screw in transport tube, and the transport tube end is equipped with flange bracket,
The helical axis of flange bracket support helix axis body, head drive shaft holds box and aft drive shaft holds box and is located at conveyor screw both ends
Outside；The flange bracket is equipped with the nylon bearing set of support helix axis；
The high-shear emulsion machine includes: motor, Double-output-shaft gear box, center agitating paddle, outer agitating paddle, emulsion tank, institute
Stating emulsion tank is cylindrical structure, and cover board is equipped at the top of emulsion tank, and cover board center upside is equipped with Double-output-shaft gear box, dual output
Shaft gear case top is connected with motor, and Double-output-shaft gear box is passed using the two-stage gear drive of interior external toothing or planetary gear
It is dynamic, center input shaft, outer output shaft are equipped in Double-output-shaft gear box, center output shaft is connected by fixed pin and central stirring shaft
Fastening is connect, outer output shaft is fastened by fixed pin and outer stirring axis connection, and central stirring shaft and outer agitating shaft lower end pass through cover board
It extend into inside emulsion tank, center agitating paddle is installed in central stirring shaft, is equipped on outer agitating shaft by clips and is stirred outside
Paddle is mixed, central stirring shaft and outer agitating shaft lower end are mounted on bottom bracket；Emulsification pot bottom nozzle is fixedly installed with emulsification and cuts
Cut net.
3. the process units of warm-mixed asphalt as claimed in claim 2, which is characterized in that the central stirring shaft and bottom bracket
Between pass through center rotor connect；
It is connected between the outer agitating shaft and bottom bracket by outer rotor, outer rotor is mounted on bottom bracket by stator；
The central stirring shaft is equipped with 2-5 center agitating paddle；
The outer agitating shaft is equipped with 2-5 outer agitating paddles.
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| CN201510256916.8A CN105316991B (en) | 2015-05-20 | 2015-05-20 | A kind of process units of warm-mixed asphalt |
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| CN201510256916.8A CN105316991B (en) | 2015-05-20 | 2015-05-20 | A kind of process units of warm-mixed asphalt |
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| CN108824131A (en) * | 2018-07-24 | 2018-11-16 | 长江南京航道工程局 | A kind of environment-friendly type asphalt mixing plant and its stirring means |
| CN109867478A (en) * | 2019-03-15 | 2019-06-11 | 深圳海川新材料科技股份有限公司 | A kind of warm mix regeneration asphalt modifying agent and preparation method thereof |
| CN111849532A (en) * | 2020-07-23 | 2020-10-30 | 方苏峤 | Production method of modified asphalt |
| CN112376357B (en) * | 2020-12-05 | 2022-11-29 | 江苏雷畅建设发展有限公司 | Asphalt heating device for road maintenance |
| CN113584999A (en) * | 2021-08-23 | 2021-11-02 | 武汉理工大学 | Ultrasonic stirring device and stirring method based on warm-mixed asphalt |
| CN114857773B (en) * | 2022-05-31 | 2023-12-12 | 河南哲伦新材料科技服务有限公司 | Heating device for preparing warm mix asphalt modifier and preparation process thereof |
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