CN102964852A - Method for producing modified asphalt by using Buton rock asphalt and hot method crusher - Google Patents
Method for producing modified asphalt by using Buton rock asphalt and hot method crusher Download PDFInfo
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- CN102964852A CN102964852A CN2012104493827A CN201210449382A CN102964852A CN 102964852 A CN102964852 A CN 102964852A CN 2012104493827 A CN2012104493827 A CN 2012104493827A CN 201210449382 A CN201210449382 A CN 201210449382A CN 102964852 A CN102964852 A CN 102964852A
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Abstract
The invention discloses a method for producing modified asphalt by using Buton rock asphalt, comprising the following steps of: mixing rock asphalt particles with thermogravimetric pyrobitumen to obtain a mixed asphalt material with a diameter less than 1mm, wherein the amount of the thermogravimetric pyrobitumen is based on the fact that the rock asphalt particles can flow and are not caked as a limit; emulsifying and grinding the mixed asphalt material with a diameter less than 1mm to obtain a modified asphalt material with the fineness being not lower than 200 meshes; and carrying out conventional quality blending on the modified asphalt material to obtain the modified asphalt. The invention also discloses a hot method crusher which comprises a power device and a crushing device, wherein a shell of the crushing device is internally separated by a material separation cylinder; a stirring device is arranged at the middle segment of a main shaft in the material separation cylinder; a movable disc is arranged at the lower segment of the main shaft; and a static disc is arranged on the inner wall of the shell corresponding to the movable disc. According to the method and the device, the Buton rock asphalt with a melting point higher than 200 DEG C into the thermogravimetric pyrobitumen with modification temperature below 190 DEG C to obtain high-performance modified asphalt.
Description
Technical field
The present invention relates to a kind of production method and production unit of modifying asphalt, relate in particular to a kind of cloth rock asphalt that pauses that utilizes and produce method and the hot method crusher of modifying asphalt.
Background technology
Rock asphalt can be divided into viscid bitumen and gilsonite, and the general oil length of viscid bitumen is higher, use it as a kind of comprehensive fuel and extract lubricating oil, the fuel wet goods is of great value.And the main component of gilsonite is bituminous matter, colloid and mineral bitumen matrix, and its utility value on road is very high.
The natural cloth rock asphalt (also claiming BRA) that pauses originates from South Pacific Indonesia Sulawesi and economizes cloth Dun Dao, it is the deposition variation that oil process in the rock crack reached 1 years, in heat, pressure, oxidation, melt the bitumen that generates under the comprehensive action of enzyme, bacterium, gain the name because it originates in Indonesia cloth Dun Dao.The cloth rock asphalt that pauses is a kind of gilsonite, so be suitable for road bedding.
The cloth rock asphalt that pauses contains the unfilled bitumen of 20-40% usually, because rock asphalt and the coexistence in 1 years of physical environment make the unfilled bitumen of this 20-40% and the combination of sandstone reach unusual stable state, becomes a kind of novel compound.Cloth pause rock asphalt the same with heavy pyrobitumen (also claiming matrix pitch) all be the derivative of oil, extraordinary compatibleness is arranged between the two, so does not have segregation phenomenon when mixing.Cloth pauses rock asphalt as the properties-correcting agent that weighs pyrobitumen, the optimum activity material of become to attach most importance to pyrobitumen and sandstone, and its compatibility with heavy pyrobitumen is far superior to polymer modifiers and the compatibility that weighs pyrobitumen.
The fusing point of rock asphalt surpasses 200 ℃ but cloth pauses, and the Heating temperature that heavy pyrobitumen allows is below 190 ℃, and rock asphalt can not be dissolved in the heavy pyrobitumen by stirring so the lower cloth of fineness pauses.The cloth rock asphalt raw ore that pauses is very hard, and Brinell hardness is more than or equal to 3, and the raw ore bituminous matter is softer more sticking, is very easy to stop up by screen cloth, and the smalls after the fragmentation again is squeezed and will clumps together.So done a lot of tests for these characteristics of raw ore, don't work that jaw crushing, reaction type are broken, cycle is broken, circular cone type is broken, roll crushing, hammer crushing or vertical shaft impact crusher, can be broken, but rock asphalt is more sticking because the cloth after the fragmentation pauses, all the time do not cross sieve, even with pulse sieve high pressure air sifter, in the course of time, screen cloth is blocked in the capital, the rock asphalt raw ore is crushed to below the 3mm so traditional common crusher can't pause cloth, more can't reach the following fineness of 1mm.
For these reasons, make the cloth application of rock asphalt on road bedding of pausing be subject to great limitation.
Summary of the invention
Purpose of the present invention just is to provide in order to address the above problem a kind of cloth rock asphalt that pauses that utilizes to produce method and the hot method crusher of modifying asphalt.
In order to achieve the above object, the present invention has adopted following technical scheme:
Utilize cloth to pause method that rock asphalt produces modifying asphalt of the present invention may further comprise the steps:
(1) with the rock asphalt particle with obtain diameter less than the mix asphalt material of 1mm after thermogravimetric pyrobitumen mixes, the amount of described thermogravimetric pyrobitumen is can make described rock asphalt particle flow, non-caked being limited;
(2) to diameter for carrying out emulsification and grinding less than the mix asphalt material of 1mm, obtain fineness and be not less than 200 purpose modifying asphalt material;
(3) the modifying asphalt material is allocated by Ordinary fruit quality, obtains satisfactory modifying asphalt.
In the aforesaid method, focus on the rock asphalt particle is mixed with thermogravimetric pyrobitumen, utilize the flowability of thermogravimetric pyrobitumen to make to be with sticking rock asphalt particle can flow, non-caked, thereby provide condition for next step emulsification and grinding.
Particularly, in the described step (1), described diameter is processed by the following method less than the mix asphalt material of 1mm: at first pulverize the cloth rock asphalt raw ore that pauses with common crusher, obtain diameter less than the rock asphalt particle of 10mm; Then rock asphalt particle and thermogravimetric pyrobitumen are carried out break process by hot method crusher, obtain diameter less than the mix asphalt material of 1mm; More specifically, the temperature of described thermogravimetric pyrobitumen is 150 ℃～190 ℃; Described hot method crusher adopts and comprises that the composite breaking method of pulverizing, stirring and high speed shear carries out break process to raw material.
Above-mentioned also is emphasis of the present invention to the cloth breaking method that the rock asphalt raw ore adopts that pauses, and rock asphalt raw ore hardness is very big because cloth pauses, the common crusher of China cloth can not be paused at all the rock asphalt crushing raw ore to diameter less than 1mm.
In the described step (2), adopt two emulsion tanks, with diameter for to send in one of them emulsion tank less than the mix asphalt material of 1mm, the mix asphalt material heats by outside circulating heater in emulsion tank, the temperature range of heating is 140 ℃～200 ℃, finish homogeneous, dispersion, emulsification, ripening process by stirring simultaneously, whole process is 15～30 minutes; Mix asphalt material after the emulsification maturation grinds with high-speed grinder, and a working cycle is finished in two tank alternations.
Hot method crusher of the present invention comprises power set and shredder assembly, described shredder assembly comprises housing and main shaft, the upper end of described housing is provided with the first opening for feed, be provided with in the described housing and be with meshed separated material cylinder, described main shaft places in the described separated material cylinder, form inner chamber in the described separated material cylinder, described inner chamber and described the first feeding inlet, form exocoel between described separated material cylinder and the described inner walls, the sidewall of described housing is provided with the second opening for feed, described exocoel and described the second feeding inlet, the upper end of described main shaft is passed described housing and is connected with the clutch end of described power set, the epimere of described main shaft is equipped with shredding unit, the stage casing of described main shaft is equipped with whipping appts, and the hypomere of described main shaft is equipped with Moving plate, evenly is provided with a plurality of Moving plate teeth on the circumference of described Moving plate upper surface, the position that is positioned at described exocoel lower end on the inwall of described housing is equipped with quiet dish, and the circumference of described quiet dish lower surface is provided with the quiet dish tooth that a plurality of and described Moving plate tooth cooperates.
In the working process, shredding unit is pulverized the rock asphalt particle of bulk, and whipping appts fully mixes heavy pyrobitumen and the Bu Dun rock asphalt of heat, and extruding downwards, the Moving plate of main shaft bottom and quiet dish agree with mutually, to mix asphalt material high velocity impact, shearing, reach purpose broken and that mutually merge.The gap of agreeing with between Moving plate and the quiet dish is exactly the size of discharging-material size, regulates the size that the gap just can adjust material granularity.
Particularly, described shredding unit is a plurality of tups; Described whipping appts is screw-blade.
Further, described hot method crusher also comprises frame, and described power set and described shredder assembly all are installed on the described frame, and described power set comprises motor and driving wheel, the belt wheel of described motor is connected by belt with described driving wheel, and described driving wheel is connected with described main shaft.
Beneficial effect of the present invention is:
By method of the present invention, fusing point can be higher than 200 ℃ the cloth rock asphalt particle that pauses and be added to modification temperature in the heavy pyrobitumen below 190 ℃, finally obtain high performance modifying asphalt.Hot method crusher of the present invention utilizes the shredding unit realization to the pulverizing of raw material, utilize the whipping appts realization to the stirring of raw material, utilize Moving plate and quiet dish to realize high speed shear, grinding to raw material, finally reach the natural cloth rock asphalt that pauses is realized efficiency crushing to diameter 1mm and obtained carrying out with thermogravimetric pyrobitumen the purpose of the mix asphalt material of hot method dissolving.The main component of breeze is oil soluble limestone in the rock asphalt because cloth pauses, not only fineness is very thin, and has an ability of goodish absorption pitch, have and strengthen pitch and the adhering effect of gathering materials, thereby make gained modifying asphalt of the present invention have high work-ing life, high stability, high resistance damage by water and the ability of very strong anti-microbial attack, very high fatigue resistance, the bituminous pavement property of its making is significantly improved.
Description of drawings
Fig. 1 is that the cloth rock asphalt that pauses that utilizes of the present invention is produced one of the schema of the method for modifying asphalt;
Fig. 2 be of the present invention utilize cloth pause rock asphalt produce modifying asphalt method schema two;
Fig. 3 is the structural representation of assembly line equipment corresponding to the described schema of Fig. 2;
Fig. 4 is the main TV structure synoptic diagram of hot method crusher of the present invention;
Fig. 5 is the main sectional view of the shredder assembly of hot method crusher of the present invention;
Fig. 6 is the Moving plate of hot method crusher of the present invention and the main sectional view of quiet dish;
Fig. 7 is the upward view of the quiet dish of hot method crusher of the present invention;
Fig. 8 is the vertical view of the Moving plate of hot method crusher of the present invention.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described in detail:
The below with two embodiment to of the present invention utilize cloth to pause method that rock asphalt produces modifying asphalt is specifically described:
Embodiment 1:
As shown in Figure 1, utilize cloth to pause method that rock asphalt produces modifying asphalt of the present invention may further comprise the steps:
(1) with diameter less than the rock asphalt particle of 1mm with obtain diameter less than the mix asphalt material of 1mm after thermogravimetric pyrobitumen mixes, the amount of described thermogravimetric pyrobitumen is can make described rock asphalt particle flow, non-caked being limited; In the said process, realize the feed of rock asphalt particle and thermogravimetric pyrobitumen and mix by charging equipment and measurement controller; The temperature of thermogravimetric pyrobitumen is 150 ℃～190 ℃, specifically can be other temperature in 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ or 150 ℃～190 ℃, only otherwise being higher than 190 ℃ gets final product; Diameter then may be processed and get the cloth rock asphalt raw ore that pauses by external disintegrating apparatus less than the rock asphalt particle of 1mm, and concrete source does not repeat them here.
(2) to diameter for carrying out emulsification and grinding less than the mix asphalt material of 1mm, obtain fineness and be not less than 200 purpose modifying asphalt material; In this process, adopt two emulsion tanks, with diameter for to send in one of them emulsion tank less than the mix asphalt material of 1mm, the mix asphalt material heats by outside circulating heater in emulsion tank, the temperature range of heating is 140 ℃～200 ℃, specifically can be 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃, other temperature in 200 ℃ or 140 ℃～200 ℃, finish homogeneous by stirring simultaneously, disperse, emulsification, ripening process, whole process is 15～30 minutes, specifically can be 15 minutes, 20 minutes, 25 minutes, in 30 minutes or 15～30 minutes At All Other Times; Mix asphalt material after the emulsification maturation grinds with high-speed grinder, and a working cycle is finished in two tank alternations, and finally obtaining fineness, to be not less than 200 purpose modifying asphalt material be cloth among Fig. 1 rock modifying asphalt that pauses; Also show the heat exchanging apparatus of emulsion tank outside and the schematic block diagram of cycle control among Fig. 1.
(3) the modifying asphalt material is allocated by Ordinary fruit quality, obtains satisfactory modifying asphalt.
Embodiment 2:
As shown in Figures 2 and 3, utilize cloth to pause another kind of method that rock asphalt produces modifying asphalt of the present invention may further comprise the steps:
(1) pulverize the cloth rock asphalt raw ore that pauses with common crusher, obtain diameter less than the rock asphalt particle of 10mm, expression adopts common impact crusher to carry out the fragmentation of rock asphalt raw ore among Fig. 2;
(2) the rock asphalt particle quantitatively is transported in the hot method crusher 6 by belt pulley 3, screw lifting transfer roller 4 and electronic measurement transfer roller 5, to send in the hot method crusher 6 through the thermogravimetric pyrobitumen of asphalt flow meter 1 metering (being the measure control among Fig. 2) simultaneously, the amount of thermogravimetric pyrobitumen is can make rock asphalt particle flow, non-caked being limited, hot method crusher 6 comprises that the composite breaking method of pulverizing, stirring and high speed shear carries out break process to raw material, obtains diameter less than the mix asphalt material of 1mm; In this step, the temperature of thermogravimetric pyrobitumen is 150 ℃～190 ℃, specifically can be other temperature in 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ or 150 ℃～190 ℃, only otherwise being higher than 190 ℃ gets final product;
(3) diameter is carried out emulsification and grinding for the mix asphalt material less than 1mm, obtain fineness and be not less than 200 purpose modifying asphalt material, concrete grammar is: the pipeline between bitumenpump 7 and the first emulsion tank 8 is equipped with the first pneumavalve 10, and the pipeline between bitumenpump 7 and the second emulsion tank 9 is equipped with the second pneumavalve 11; First the mix asphalt material is sent into first the first emulsion tank 8 by bitumenpump 7, mix asphalt circulating heater by the outside in the first emulsion tank 8 is well heater 21 and recycle pump 22 heating, finish homogeneous, disperse, emulsification, ripe, the temperature range of heating is 140 ℃～200 ℃, specifically can be 140 ℃, 145 ℃, 150 ℃, 155 ℃, 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃, 195 ℃, other temperature in 200 ℃ or 140 ℃～200 ℃, be 15～30 minutes heat-up time, specifically can be 15 minutes, 20 minutes, 25 minutes, At All Other Times, the mix asphalt material after the emulsification grinds with high-speed grinder 20 in 30 minutes or 15～30 minutes; Then utilize the second emulsion tank 9 second emulsion tanks 9 to carry out and upper identical process, two tank alternations, finally continuing to obtain fineness, to be not less than 200 purpose modifying asphalt material be cloth among Fig. 2 rock modifying asphalt that pauses; In above-mentioned emulsification and the grinding plant, the first average stirrer 23 is installed above the first emulsion tank 8, the above is equipped with the second average stirrer 24, pipeline between the first emulsion tank 8 and high-speed grinder 20 is equipped with the 3rd pneumavalve 16, pipeline between the second emulsion tank 9 and high-speed grinder 20 is equipped with the 4th pneumavalve 19, the first emulsion tank 8 also is provided with another discharge nozzle that the 5th pneumavalve 12 is installed and is connected with total discharge nozzle 25, the second emulsion tank 9 also is provided with another discharge nozzle that the 6th pneumavalve 13 is installed and is connected with total discharge nozzle 25, the 7th pneumavalve 17 is installed on the circulation discharge nozzle of the first emulsion tank 8, the 8th pneumavalve 14 is installed on the recycle feed pipe of the first emulsion tank 8, the 9th pneumavalve 18 is installed on the circulation discharge nozzle of the second emulsion tank 9, the tenth pneumavalve 15 is installed on the recycle feed pipe of the second emulsion tank 9, on total discharge nozzle 25 the 11 pneumavalve 26 is installed, total discharge nozzle 25 mix asphalt out is the modifying asphalt material, and the concrete fineness of modifying asphalt material can realize by controlling each pneumavalve.
(4) the modifying asphalt material is allocated by Ordinary fruit quality, obtains satisfactory modifying asphalt, and concrete grammar is: the modifying asphalt material is sent into blend tank 27 by total discharge nozzle 25 and is allocated with other pitch, obtains satisfactory modifying asphalt; Stirrer 28 is installed above the blend tank 27 and is used for the opening for feed 29 of other pitch.
As shown in Figure 4, hot method crusher of the present invention comprises frame 30, power set 32 and shredder assembly 31, power set 32 and shredder assembly 31 all are installed on the frame 30, and power set 32 comprises motor 36 and driving wheel 33, and the belt wheel 35 of motor 36 is connected by belt 34 with driving wheel 33.
As shown in Figure 3, shredder assembly 31 comprises housing 37 and main shaft 38, the upper end of housing 37 is provided with the first opening for feed 39, be provided with in the housing 37 and be with meshed separated material cylinder 44, main shaft 38 places in the separated material cylinder 44, separated material cylinder 44 interior formation inner chambers 46, inner chamber 46 communicates with the first opening for feed 39, form exocoel 47 between the inwall of separated material cylinder 44 and housing 37, the sidewall of housing 37 is provided with the second opening for feed 45, and exocoel 47 communicates with the second opening for feed 45, and the upper end of main shaft 38 is passed housing 37 and is connected with driving wheel 33, the epimere of main shaft 38 is equipped with tup 41, tup 41 also can be other shredding unit, and the stage casing of described main shaft is equipped with screw-blade 40, and screw-blade 40 also can be other whipping appts, the hypomere of main shaft 38 is equipped with Moving plate 43, and the position that is positioned at exocoel 47 lower ends on the inwall of housing 37 is equipped with quiet dish 42; Such as Fig. 4, Fig. 5 and shown in Figure 6, evenly be provided with a plurality of Moving plate teeth 49 on the circumference of Moving plate 43 upper surfaces, the circumference of quiet dish 42 lower surfaces is provided with a plurality of quiet dish teeth 48 that cooperate with Moving plate tooth 49.Quiet dish tooth 48 and Moving plate tooth 49 have the gap of 0.1-3mm each other, decide on its discharging-material size, a Moving plate 43 and a quiet dish 42 form one group of sound dish, cutting out section can be comprised of one group of sound dish, also can be in series by the sound dish in many groups of multiple gaps, there is shown one group of sound dish.
As shown in Figures 2 and 3, in the working process, motor 36 drives main shaft 38 high speed rotating, the heavy pyrobitumen of heating enters exocoel 47 by the second opening for feed 45, enter inner chamber 46 in the separated material cylinder 44 with the sticking cloth rock asphalt particle that pauses from the first opening for feed 39, by tup 41 rock asphalt of bulk is smashed, the rock asphalt of smashing be subject to screw-blade 40 extruding and because the power that screw-blade 40 produces so that thermogravimetric pyrobitumen and rock asphalt fully mix, and extruding downwards, the quiet dish tooth 48 of the Moving plate tooth 49 of the Moving plate 43 of bottom and quiet dish 42 agrees with mutually, to the rock asphalt high velocity impact, shear, gap between Moving plate tooth 49 and the quiet dish tooth 48 is exactly the size of discharging-material size, regulates the size that the gap just can adjust material granularity.
Claims (8)
1. utilize cloth to pause method that rock asphalt produces modifying asphalt is characterized in that: may further comprise the steps:
(1) with the rock asphalt particle with obtain diameter less than the mix asphalt material of 1mm after thermogravimetric pyrobitumen mixes, the amount of described thermogravimetric pyrobitumen is can make described rock asphalt particle flow, non-caked being limited;
(2) to diameter for carrying out emulsification and grinding less than the mix asphalt material of 1mm, obtain fineness and be not less than 200 purpose modifying asphalt material;
(3) the modifying asphalt material is allocated by Ordinary fruit quality, obtains satisfactory modifying asphalt.
2. utilize cloth to pause method that rock asphalt produces modifying asphalt according to claim 1, it is characterized in that: in the described step (1), described diameter is processed by the following method less than the mix asphalt material of 1mm: at first pulverize the cloth rock asphalt raw ore that pauses with common crusher, obtain diameter less than the rock asphalt particle of 10mm; Then rock asphalt particle and thermogravimetric pyrobitumen are carried out break process by hot method crusher, obtain diameter less than the mix asphalt material of 1mm.
3. utilize cloth to pause method that rock asphalt produces modifying asphalt according to claim 2, it is characterized in that: the temperature of described thermogravimetric pyrobitumen is 150 ℃～190 ℃; Described hot method crusher adopts and comprises that the composite breaking method of pulverizing, stirring and high speed shear carries out break process to raw material.
4. utilize cloth to pause method that rock asphalt produces modifying asphalt according to claim 1, it is characterized in that: in the described step (2), adopt two emulsion tanks, with diameter for to send in one of them emulsion tank less than the mix asphalt material of 1mm, the mix asphalt material heats by outside circulating heater in emulsion tank, the temperature range of heating is 140 ℃～200 ℃, finishes homogeneous, dispersion, emulsification, ripening process by stirring simultaneously, and whole process is 15～30 minutes; Mix asphalt material after the emulsification maturation grinds with high-speed grinder, and a working cycle is finished in two tank alternations.
5. one kind such as claim 2, the hot method crusher that 3 or 4 described methods adopt, comprise power set and shredder assembly, it is characterized in that: described shredder assembly comprises housing and main shaft, the upper end of described housing is provided with the first opening for feed, be provided with in the described housing and be with meshed separated material cylinder, described main shaft places in the described separated material cylinder, form inner chamber in the described separated material cylinder, described inner chamber and described the first feeding inlet, form exocoel between described separated material cylinder and the described inner walls, the sidewall of described housing is provided with the second opening for feed, described exocoel and described the second feeding inlet, the upper end of described main shaft is passed described housing and is connected with the clutch end of described power set, the epimere of described main shaft is equipped with shredding unit, the stage casing of described main shaft is equipped with whipping appts, the hypomere of described main shaft is equipped with Moving plate, evenly be provided with a plurality of Moving plate teeth on the circumference of described Moving plate upper surface, the position that is positioned at described exocoel lower end on the inwall of described housing is equipped with quiet dish, and the circumference of described quiet dish lower surface is provided with the quiet dish tooth that a plurality of and described Moving plate tooth cooperates.
6. hot method crusher according to claim 5, it is characterized in that: described shredding unit is a plurality of tups.
7. hot method crusher according to claim 5, it is characterized in that: described whipping appts is screw-blade.
8. hot method crusher according to claim 5, it is characterized in that: described hot method crusher also comprises frame, described power set and described shredder assembly all are installed on the described frame, described power set comprises motor and driving wheel, the belt wheel of described motor is connected by belt with described driving wheel, and described driving wheel is connected with described main shaft.
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| CN201210449382.7A CN102964852B (en) | 2012-11-12 | 2012-11-12 | Method for producing modified asphalt by using Buton rock asphalt and hot method crusher |
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| CN201210449382.7A CN102964852B (en) | 2012-11-12 | 2012-11-12 | Method for producing modified asphalt by using Buton rock asphalt and hot method crusher |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819913A (en) * | 2014-02-21 | 2014-05-28 | 淄博京源新材料科技有限公司 | High-performance modified asphalt, and preparation method and preparation apparatus thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103819913A (en) * | 2014-02-21 | 2014-05-28 | 淄博京源新材料科技有限公司 | High-performance modified asphalt, and preparation method and preparation apparatus thereof |
| CN103819913B (en) * | 2014-02-21 | 2016-05-04 | 淄博京源新材料科技有限公司 | High performance modified bitumen and preparation method thereof and device |
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