CN104725883A - High-viscosity high-elasticity asphalt based on surface modification of rubber particles, and high-viscosity high-elasticity SMA (stone mastic asphalt) mixture based on surface modification of rubber particles and preparing method thereof - Google Patents
High-viscosity high-elasticity asphalt based on surface modification of rubber particles, and high-viscosity high-elasticity SMA (stone mastic asphalt) mixture based on surface modification of rubber particles and preparing method thereof Download PDFInfo
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Abstract
The invention discloses high-viscosity high-elasticity asphalt based on surface modification of rubber particles, and high-viscosity high-elasticity SMA (stone mastic asphalt) mixture based on surface modification of rubber particles and preparing method thereof. The high-viscosity high-elasticity asphalt is made from base asphalt, activated rubber powder, a weatherable component, a tackifying component, a plasticizing component, a compatibilizing component and a cross-linking component according to a mass ratio being 100:(15-20):(4-6):(2-4):(1-3):(1-5):(0.1-1). By applying the high-viscosity high-elasticity asphalt to the production of the SMA mixture, performances of the mixture, such as ageing resistance, low temperature performance, high-temperature performance and fatigue resistance. The technical problem that the composite modified asphalt with low amount of rubber powder is difficult to use in asphalt concrete is solved; the high-viscosity high-elasticity asphalt and the high-viscosity high-elasticity SMA mixture are suitable for popularization and application.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification and SAM compound and preparation method thereof.
Background technology
Along with national economy rapid development, the industry size of communications and transportation also constantly increases thereupon, it is also proposed higher requirement to the over-all properties of pavement material (weather resistance, usability and functional).In the last few years, domestic and international research institution developed multiple modification class bituminous material in succession, to promote the material property of road bitumen and asphalt.
Wherein, because SBS (styrene-butadiene-styrene block copolymer) and rubber powder are the most obvious to the lifting effect of pitch viscoelastic property, the research at present based on the asphalt modification technology of SBS or rubber powder is more deep.SBS forms macromolecule network by dispersion in pitch, reduces asphalt temperature susceptibility.But domestic and international result of study shows, there is ultimate value (about 8%) at the volume of pitch in SBS, after exceeding this volume, modifying asphalt system generation phase reversion, make its performance occur obviously to reduce, this factor causes SBS to promote limited extent to the viscoelastic property of pitch.In addition, rubber powder obviously can promote the elasticity of modifying asphalt, but due to the rubber grain poor storage stability at pitch, Special Equipment must be adopted in construction " now to change existing use ", not only stricter requirement is proposed to the application art of rubber asphalt, and the performance of rubber asphalt road pavement material after segregation also causes negative impact.
At present, there is research to adopt the technology of SBS and rubber combined modification, the viscoelastic property of pitch is further improved, but also there is obvious technical limitation: first, for guaranteeing that serious segregation does not occur the rubber powder in composite modified asphalt, its volume only can reach about 5 ~ 10%; Secondly, owing to adopting multiple modified component, cause the viscosity of pitch to significantly improve, apply in bituminous concrete, there is the problem that compactness is difficult to ensure, therefore SBS-rubber powder composite modified asphalt is only mainly used in stress absorbing layer or vibration damping structure at present.
Summary of the invention
The object of the invention is to provide a kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification and SAM asphalt and preparation method thereof, adopt the surface activation techniques of rubber grain, and carry out components do match optimization for bituminous material, obtain the pitch with high-viscosity high-elasticity performance, be applied to and prepare asphalt and effectively can improve the ageing-resistant performance of asphalt, low-temperature performance, high-temperature behavior and anti-fatigue performance etc.
For achieving the above object, the technical solution used in the present invention is: a kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, it is with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component, plasticizing component, increase-volume component and linked for raw material is prepared from, and the mass ratio between each component is: matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: linked=100:(15 ~ 20): (4 ~ 6): (2 ~ 4): (1 ~ 3): (1 ~ 5): (0.1 ~ 1).
In such scheme, described activating rubber powder by rubber powder and surface active component with 100:(5 ~ 30) mass ratio form through surface active, concrete preparation process is: rubber powder is stirred 30 ~ 120s in the agitator kettle of 40 ~ 60 DEG C; Then divide three times and add surface active component, each add-on is 10 ~ 70% of surface active component total mass, each stirring 5 ~ 20min, the amount added depends on and flows down without too much surface active component at the bottom of agitator kettle, and rubber grain is without the agglomerating phenomenon of serious bonding simultaneously; Finally, close agitator kettle temperature, make agitator kettle temperature be reduced to room temperature, after this phase lasts stirs 30 ~ 60min, obtain described activating rubber powder.
In such scheme, described rubber powder is 40 orders or 80 order bias tire vulcanized rubber powders.
In such scheme, described surface active component is aromatic base rubber oil, one or more in naphthenic rubber oil & fat hydrocarbon solvent oil mix by any proportioning.
In such scheme, described matrix pitch is that 70# or 90# heavily hands over petroleum pitch; Weather-proof component is line style styrene-butadiene-styrene block copolymer; Adhesion promoting component is note olefine resin, one or more in Gum Rosin, C9 petroleum resin and C5 petroleum resin mix in any proportion; Plasticizing component is for facing phthalic acid dibutyl ester or facing phthalic acid dibutyl ester; Increase-volume component is furfural extract oil, second line of distillation extracts oil out, subtract one or more of extracting out in oil, aromatic hydrocarbon oil of three lines mixes in any proportion; Linked is sulphur or dicumyl peroxide.
The preparation method of above-mentioned a kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, comprises the steps: 1) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: linked=100:(15 ~ 20): (4 ~ 6): (2 ~ 4): (1 ~ 3): (1 ~ 5): the mass ratio of (0.1 ~ 1) takes each raw material; 2) matrix pitch is heated to 160 ~ 170 DEG C, opens high-speed shearing machine; Gradually rotating speed is promoted to 2000 ~ 3000r/min, then adds weather-proof component, continue shearing 10 ~ 20min; Keep shearing rotating speed constant, add adhesion promoting component, continue shearing 3 ~ 5min; Then promote velocity of shear to 5000 ~ 6000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 20 ~ 40min; Reduce velocity of shear to 3000 ~ 4000r/min, add linked, continue shearing 20 ~ 40min; Above shear history control temperature is between 185 ~ 200 DEG C; 3) after shear history completes, by sample as growth 30 ~ 60min swelling in the baking oven of 135 ~ 145 DEG C; From baking oven, take out sample, after cooling, namely obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
A kind of high-viscosity high-elasticity asphalt compound based on rubber particle surface modification, it is with coarse aggregate, fine aggregate, filler, fiber, high-viscosity high-elasticity asphalt and viscosity regulation component for raw material is prepared from, and the mass ratio between each component is: coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: viscosity regulation component=75:(10 ~ 15): (8 ~ 12): (0.2 ~ 0.4): (6.0 ~ 6.5): (6 ~ 10).
In such scheme, described viscosity regulation component is sodium silicoaluminate or sulphonated polystyrene.
In such scheme, described high-viscosity high-elasticity asphalt is the above-mentioned high-viscosity high-elasticity asphalt based on rubber particle surface modification; Coarse aggregate is that basalt or diabase gather materials, crush values < 10%; Fine aggregate is that limestone, basalt or diabase gather materials; Filler is the levigate breeze obtained of strong subsiliceous rock in limestone mineral powder or magmatite; Fiber is polyacrylonitrile fibre or trevira.Wherein fine aggregate, filler, fiber, high-viscosity high-elasticity asphalt form high stiffness asphalt mastic, and coarse aggregate forms the skeleton that gathers materials.
Preferably, the formate gradation composition scope of described coarse aggregate, fine aggregate, filler is as shown in table 1:
The preferred grading limit of table 1 high-viscosity high-elasticity asphalt compound
The preparation method of above-mentioned a kind of high-viscosity high-elasticity asphalt compound based on rubber particle surface modification, comprises the following steps: 1) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: viscosity regulation component=75:(10 ~ 15): (8 ~ 12): (0.2 ~ 0.4): (6.0 ~ 6.5): the mass ratio of (6 ~ 10) takes each raw material; 2) coarse aggregate, fine aggregate are heated 5 ~ 8h in 190 ~ 200 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3 ~ 4h in 160 ~ 170 DEG C of baking ovens; 3) successively coarse aggregate, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber and viscosity regulation component are added in the agitator kettle of 160 ~ 170 DEG C, stir 90 ~ 180s, obtain described high-viscosity high-elasticity SMA asphalt; Then roller-compaction at 160 ~ 170 DEG C, obtains high-viscosity high-elasticity SMA bituminous concrete.
Beneficial effect of the present invention is:
1) the present invention is by the surface activation techniques of rubber grain, and the swelling transition region thickness in the surface that rubber grain is formed in asphalt system increases, and promotes the stability in storage of rubber powder in asphalt adhesive body structure; And by reasonably introducing the materials such as increase-volume component, linked, the colloidal structure of pitch is regulated and controled, form SBS molecular chain and the surface-crosslinked composite elastic network of rubber powder, and dipole orientation power between polymer macromolecule under weakening high temperature in pitch, increase molecular chain movability, realize the regulation and control to asphalt modulus, promote the dispersed of properties-correcting agent, the viscoelastic property of pitch is made to obtain comprehensive remarkable lifting, under overcoming the condition of conventional rubber powder high additive (> 15wt%), pitch cannot stably stored problem.
2) the present invention proposes a kind of mineral aggregate gradation scope of new high-viscosity high-elasticity asphalt compound, compared with common bituminous concrete, there is high contents of ground slag, high microsteping volume, the high stiffness asphalt mastic of high pitch volume and macrovoid to gather materials the feature of skeleton, simultaneously using the high-viscosity high-elasticity asphalt after rubber powder surface active as agglutinate, ageing-resistant performance, low-temperature performance, high-temperature behavior, water resistant stability and the anti-fatigue performance etc. of the bituminous concrete (high-viscosity high-elasticity SMA asphalt) obtained all comprehensively are promoted.
3) the present invention by introducing viscosity regulation component in high-viscosity high-elasticity asphalt concrete preparation process, significantly reduce the compacting difficulty of bituminous concrete, achieve and roll in temperature range at conventional pavement construction, high-viscosity high-elasticity asphalt is concrete to pave and roller compaction construction, solves the problem that SBS-rubber powder composite modified asphalt is applied to the compactness deficiency that bituminous concrete very easily exists.
4) invention increases the volume of rubber powder, there is significant environment protection significance, and effectively can improve use properties and the endurance quality of pavement material, there is significant economic and social profit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with specific embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In following examples, as no specific instructions, the reagent of employing is commercially available chemical reagent or Industrial products.
Described weather-proof component is line style styrene-butadiene-styrene block copolymer (SBS); Matrix pitch selects 90# heavily to hand over petroleum pitch; Surface active component selects aromatic base rubber oil.
Embodiment 1
1) high-viscosity high-elasticity asphalt
A kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component (C5 petroleum resin), plasticizing component (facing phthalic acid dibutyl ester), increase-volume component (second line of distillation extracts oil out) and linked (dicumyl peroxide) for raw material is prepared from, concrete preparation process is as follows:
A) preparation of activating rubber powder: be that 100:5 takes raw material by the mass ratio of rubber powder (80 order bias tire vulcanized rubber powder) and surface active component; First rubber powder is stirred 120s in the agitator kettle of 40 DEG C; Then, divide and add surface active component three times, the amount that first time adds with second time is 40% of total amount (surface active component total mass), and stirs 15min respectively, and the amount that the 3rd ground adds is 20% of total amount, and stirs 5min; Finally, close agitator kettle heating unit, make agitator kettle temperature be reduced to room temperature, continue Keep agitation 45min in the process, obtain described surface active rubber powder.
B) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: the mass ratio of linked=100:18:4.7:3.2:1.7:3.3:0.8 takes each raw material.
C) matrix pitch is heated to 170 DEG C, and opens high-speed shearing machine; After gradually rotating speed being risen to 2000r/min, add weather-proof component, continue to shear 20min; Keep shearing rotating speed constant, add adhesion promoting component, continue to shear 5min; Promote velocity of shear to 5500r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 30min; Reduce velocity of shear to 4000r/min, add linked, continue to shear 40min; Above shear history control temperature is between 190 DEG C ~ 200 DEG C.
D) after shear history completes, by sample as growth 60min swelling in 135 DEG C of baking ovens; Take out sample in an oven, after cooling, obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
The high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification that the present embodiment obtains are as described in Table 2:
The obtained high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification of table 2 embodiment 1
| Test event | Unit | Index request | Technical indicator |
| Softening temperature | ℃ | ≥90 | 92.7 |
| 5 DEG C of ductilities | cm | ≥40 | 59.6 |
| 25 DEG C of recovery of elasticity | ％ | ≥95 | 99.6 |
| Sticky toughness | N·m | ≥25 | 32.5 |
| 60 DEG C of viscosity | Pa·s | ≥70000 | 92500 |
2) high-viscosity high-elasticity SMA asphalt
The above-mentioned obtained high-viscosity high-elasticity asphalt based on rubber particle surface modification is applied to and prepares asphalt, with coarse aggregate, (diabase gathers materials described high-viscosity high-elasticity asphalt compound, crush values 8.2%), fine aggregate (diabase gathers materials), filler (limestone mineral powder), fiber (polyacrylonitrile fibre), high-viscosity high-elasticity asphalt (high-viscosity high-elasticity asphalt based on rubber particle surface modification) and viscosity regulation component (sodium silicoaluminate) be prepared from for raw material, concrete preparation process is as follows:
A) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: the mass ratio of viscosity regulation component=75:11:8:0.3:6.5:9 takes each raw material, and the formate gradation composition of coarse aggregate, fine aggregate, filler meets the requirement of table 3.
B) first, coarse aggregate, fine aggregate are heated 5h in 200 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3.5h in 160 DEG C of baking ovens; Then, be sequentially added into coarse aggregate respectively, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber, viscosity regulation component add in the agitator kettle of 165 DEG C, stir 155s, the high-viscosity high-elasticity SMA asphalt taking out described, then at 165 DEG C of roller-compactions, high-viscosity high-elasticity SMA bituminous concrete is obtained.
The formate gradation composition of the high-viscosity high-elasticity SMA bituminous concrete that the present embodiment obtains is as shown in table 3, and its performance index are as shown in table 4.
The grading limit of high-viscosity high-elasticity SMA asphalt described in table 3 embodiment 1
The performance index of table 4 embodiment 1 gained high-viscosity high-elasticity SMA asphalt
| Performance perameter | Unit | Index request | Technical indicator |
| Voidage | ％ | 3～4 | 3.4 |
| 60 DEG C of dynamic stabilities | Secondary/mm | >8000 | 9304 |
| Immersion residual stability | ％ | ≥90 | 92.8 |
| Freeze-thaw split strength ratio | ％ | ≥85 | 93.1 |
| The maximum flexural-tensile strain of low temperature | με | ≥3000 | 3588 |
Embodiment 2
1) high-viscosity high-elasticity asphalt
A kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component (note olefine resin), plasticizing component (facing phthalic acid dibutyl ester), increase-volume component (furfural extract oil) and linked (sulphur) for raw material is prepared from, concrete preparation process is as follows:
A) preparation of activating rubber powder: be that 100:25 takes raw material by rubber powder (40 orders or 80 order bias tire vulcanized rubber powders) and the mass ratio of surface active component; First rubber powder is stirred 80s in the agitator kettle of 50 DEG C; Then, a point three phases adds surface active component, and the amount that first time adds is 20% of total amount (surface active component total mass), stir 5min, the amount that second time adds is 30% of total amount, stirs 15min, the amount that third time adds is 50% of total amount, stirs 20min; Finally, close agitator kettle heating unit, make agitator kettle temperature be reduced to room temperature, continue Keep agitation 30min in the process, obtain described surface active rubber powder.
B) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: the mass ratio of linked=100:15:5.2:2.0:1.3:2.2:0.8 takes each raw material.
C) matrix pitch is heated to 160 DEG C, and opens high-speed shearing machine; After gradually rotating speed being risen to 2500r/min, add weather-proof component, continue to shear 15min; Keep shearing rotating speed constant, add adhesion promoting component, continue to shear 3min; Promote velocity of shear to 5000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 20min; Reduce velocity of shear to 3500r/min, add linked, continue to shear 30min; Above shear history control temperature is between 185 ~ 190 DEG C.
D) after shear history completes, by sample as growth 60min swelling in 145 DEG C of baking ovens; Take out sample in an oven, after cooling, obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
The high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification that the present embodiment obtains are as described in Table 5:
The obtained high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification of table 5 embodiment 2
| Test event | Unit | Index request | Technical indicator |
| Softening temperature | ℃ | ≥90 | 92.2 |
| 5 DEG C of ductilities | cm | ≥40 | 60.1 |
| 25 DEG C of recovery of elasticity | ％ | ≥95 | 99.3 |
| Sticky toughness | N·m | ≥25 | 32.5 |
| 60 DEG C of viscosity | Pa·s | ≥70000 | 91600 |
2) high-viscosity high-elasticity SMA asphalt
The above-mentioned obtained high-viscosity high-elasticity asphalt based on rubber particle surface modification is applied to and prepares asphalt, described high-viscosity high-elasticity asphalt compound is with coarse aggregate (basalt aggregate, crush values 6.9%), fine aggregate (basalt aggregate), filler (the strong subsiliceous rock in magmatite is levigate the breeze obtained), fiber (trevira), high-viscosity high-elasticity asphalt (high-viscosity high-elasticity asphalt based on rubber particle surface modification) and viscosity regulation component (sulphonated polystyrene) be prepared from for raw material, concrete preparation process is as follows:
A) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: the mass ratio of viscosity regulation component=75:14.5:11.8:0.2:6.0:6.2 takes each raw material, and the formate gradation composition of coarse aggregate, fine aggregate, filler meets the requirement of table 6.
B) first, coarse aggregate, fine aggregate are heated 5h in 190 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3h in 170 DEG C of baking ovens; Then, be sequentially added into coarse aggregate respectively, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber, viscosity regulation component add in the agitator kettle of 160 DEG C, stir 180s, the high-viscosity high-elasticity SMA asphalt taking out described, then at 170 DEG C of roller-compactions, high-viscosity high-elasticity SMA bituminous concrete is obtained.
The formate gradation composition of the high-viscosity high-elasticity SMA bituminous concrete that the present embodiment obtains is as shown in table 6, and its performance index are as shown in table 7.
The grading limit of high-viscosity high-elasticity SMA asphalt described in table 6 embodiment 2
The performance index of table 7 embodiment 2 gained high-viscosity high-elasticity SMA asphalt
| Performance perameter | Unit | Index request | Technical indicator |
| Voidage | ％ | 3～4 | 3.2 |
| 60 DEG C of dynamic stabilities | Secondary/mm | >8000 | 9501 |
| Immersion residual stability | ％ | ≥90 | 93.0 |
| Freeze-thaw split strength ratio | ％ | ≥85 | 92.2 |
| The maximum flexural-tensile strain of low temperature | με | ≥3000 | 3650 |
Embodiment 3
1) high-viscosity high-elasticity asphalt
A kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component (Gum Rosin), plasticizing component (facing phthalic acid dibutyl ester), increase-volume component (subtract three lines and extract oil out) and linked (sulphur) for raw material is prepared from, concrete preparation process is as follows:
A) preparation of activating rubber powder: be that 100:30 takes raw material by the mass ratio of rubber powder (80 order bias tire vulcanized rubber powder) and surface active component; First rubber powder is stirred 60s in the agitator kettle of 55 DEG C; Then, a point three phases adds surface active component, and the amount that first time adds is 10% of total amount (surface active component total mass), stir 5min, the amount that second time adds is 20% of total amount, stirs 5min, the amount that third time adds is 70% of total amount, stirs 20min; Finally, close agitator kettle heating unit, make agitator kettle temperature be reduced to room temperature, continue Keep agitation 60min in the process, obtain described surface active rubber powder.
B) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: the mass ratio of linked=100:20:4.2:3.0:3.0:4.6:0.2 takes each raw material.
C) matrix pitch is heated to 165 DEG C, and opens high-speed shearing machine; After gradually rotating speed being risen to 3000r/min, add weather-proof component, continue to shear 10min; Keep shearing rotating speed constant, add adhesion promoting component, continue to shear 4min; Promote velocity of shear to 6000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 40min; Reduce velocity of shear to 3500r/min, add linked, continue to shear 40min; Above shear history control temperature is between 185 ~ 195 DEG C.
D) after shear history completes, by sample as growth 50min swelling in 135 DEG C of baking ovens; Take out sample in an oven, after cooling, obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
The high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification that the present embodiment obtains are as described in Table 8:
The obtained high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification of table 8 embodiment 3
| Performance perameter | Unit | Index request | Technical indicator |
| Softening temperature | ℃ | ≥90 | 92.2 |
| 5 DEG C of ductilities | cm | ≥40 | 59.9 |
| 25 DEG C of recovery of elasticity | ％ | ≥95 | 99.0 |
| Sticky toughness | N·m | ≥25 | 32.4 |
| 60 DEG C of viscosity | Pa·s | ≥70000 | 92250 |
2) high-viscosity high-elasticity SMA asphalt
The above-mentioned obtained high-viscosity high-elasticity asphalt based on rubber particle surface modification is applied to and prepares asphalt, with coarse aggregate, (diabase gathers materials described high-viscosity high-elasticity asphalt compound, crush values 8.2%), fine aggregate (diabase gathers materials), filler (the strong subsiliceous rock in magmatite is levigate the breeze obtained), fiber (trevira), high-viscosity high-elasticity asphalt (high-viscosity high-elasticity asphalt based on rubber particle surface modification) and viscosity regulation component (sulphonated polystyrene) be prepared from for raw material, concrete preparation process is as follows:
A) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: the mass ratio of viscosity regulation component=75:15:8.1:0.4:6.5:10 takes each raw material, and the formate gradation composition of coarse aggregate, fine aggregate, filler meets the requirement of table 9.
B) first, coarse aggregate, fine aggregate are heated 6h in 200 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3h in 160 DEG C of baking ovens; Then, be sequentially added into coarse aggregate respectively, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber, viscosity regulation component add in the agitator kettle of 160 DEG C, stir 100s, the high-viscosity high-elasticity SMA asphalt taking out described, then at 160 DEG C of roller-compactions, high-viscosity high-elasticity SMA bituminous concrete is obtained.
The formate gradation composition of the high-viscosity high-elasticity SMA bituminous concrete that the present embodiment obtains is as shown in table 9, and its performance index are as shown in table 10.
The grading limit of high-viscosity high-elasticity SMA asphalt described in table 9 embodiment 3
The performance index of table 10 embodiment 3 gained high-viscosity high-elasticity SMA asphalt
| Performance perameter | Unit | Index request | Technical indicator |
| Voidage | ％ | 3～4 | 3.3 |
| 60 DEG C of dynamic stabilities | Secondary/mm | >8000 | 9494 |
| Immersion residual stability | ％ | ≥90 | 92.8 |
| Freeze-thaw split strength ratio | ％ | ≥85 | 93.1 |
| The maximum flexural-tensile strain of low temperature | με | ≥3000 | 3508 |
Embodiment 4
1) high-viscosity high-elasticity asphalt
A kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component (C9 petroleum resin), plasticizing component (facing phthalic acid dibutyl ester), increase-volume component (furfural extract oil and subtract three lines extract out oil mixture, mass ratio is 100:30) and linked (dicumyl peroxide) be prepared from for raw material, concrete preparation process is as follows:
A) preparation of activating rubber powder: be that 100:15 takes raw material by the mass ratio of rubber powder (80 order bias tire vulcanized rubber powder) and surface active component (aromatic base rubber oil); First rubber powder is stirred 120s in the agitator kettle of 45 DEG C; Then, a point three phases adds surface active component, and the amount that first time adds is 40% of total amount (surface active component total mass), stir 15min, the amount that second time adds is 30% of total amount, stirs 10min, the amount that third time adds is 30% of total amount, stirs 20min; Finally, close agitator kettle heating unit, make agitator kettle temperature be reduced to room temperature, continue Keep agitation 30min in the process, obtain described surface active rubber powder.
B) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: the mass ratio of linked=100:16:5.8:3.8:1.0:1.2:0.6 takes each raw material.
C) matrix pitch is heated to 170 DEG C, and opens high-speed shearing machine; After gradually rotating speed being risen to 2000r/min, add weather-proof component, continue to shear 20min; Keep shearing rotating speed constant, add adhesion promoting component, continue to shear 3min; Promote velocity of shear to 5000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 20min; Reduce velocity of shear to 3500r/min, add linked, continue to shear 20min; Above shear history control temperature is between 190 ~ 200 DEG C.
D) after shear history completes, by sample as growth 30min swelling in 145 DEG C of baking ovens; Take out sample in an oven, after cooling, obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
The high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification that the present embodiment obtains are as described in Table 11:
The obtained high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification of table 11 embodiment 4
| Test event | Unit | Index request | Technical indicator |
| Softening temperature | ℃ | ≥90 | 92.7 |
| 5 DEG C of ductilities | cm | ≥40 | 59.8 |
| 25 DEG C of recovery of elasticity | ％ | ≥95 | 99.3 |
| Sticky toughness | N·m | ≥25 | 32.2 |
| 60 DEG C of viscosity | Pa·s | ≥70000 | 92400 |
2) high-viscosity high-elasticity SMA asphalt
The above-mentioned obtained high-viscosity high-elasticity asphalt based on rubber particle surface modification is applied to and prepares asphalt, with coarse aggregate, (diabase gathers materials described high-viscosity high-elasticity asphalt compound, crush values 8.2%), fine aggregate (diabase gathers materials), filler (limestone mineral powder), fiber (polyacrylonitrile fibre), high-viscosity high-elasticity asphalt (high-viscosity high-elasticity asphalt based on rubber particle surface modification) and viscosity regulation component (sodium silicoaluminate) be prepared from for raw material, concrete preparation process is as follows:
A) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: the mass ratio of viscosity regulation component=75:13:12:0.4:6.2:6.0 takes each raw material, and the formate gradation composition of coarse aggregate, fine aggregate, filler meets the requirement of table 12.
B) first, coarse aggregate, fine aggregate are heated 8h in 195 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3h in 170 DEG C of baking ovens; Then, be sequentially added into coarse aggregate respectively, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber, viscosity regulation component add in the agitator kettle of 170 DEG C, stir 90s, the high-viscosity high-elasticity SMA asphalt taking out described, then at 170 DEG C of roller-compactions, high-viscosity high-elasticity SMA bituminous concrete is obtained.
The formate gradation composition of the high-viscosity high-elasticity SMA bituminous concrete that the present embodiment obtains is as shown in table 12, and its performance index are as shown in table 13.
The grading limit of high-viscosity high-elasticity SMA asphalt described in table 12 embodiment 4
The performance index of table 13 embodiment 4 gained high-viscosity high-elasticity SMA asphalt
| Performance perameter | Unit | Index request | Technical indicator |
| Voidage | ％ | 3～4 | 3.4 |
| 60 DEG C of dynamic stabilities | Secondary/mm | >8000 | 9379 |
| Immersion residual stability | ％ | ≥90 | 92.2 |
| Freeze-thaw split strength ratio | ％ | ≥85 | 92.7 |
| The maximum flexural-tensile strain of low temperature | με | ≥3000 | 3587 |
Embodiment 5
1) high-viscosity high-elasticity asphalt
A kind of high-viscosity high-elasticity asphalt based on rubber particle surface modification, be prepared from for raw material with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component (in C5 petroleum resin), plasticizing component (facing phthalic acid dibutyl ester), increase-volume component (aromatic hydrocarbon oil) and linked (sulphur), concrete preparation process is as follows:
A) preparation of activating rubber powder: be that 100:12 takes raw material by the mass ratio of rubber powder (80 order bias tire vulcanized rubber powder) and surface active component; First rubber powder is stirred 30s in the agitator kettle of 60 DEG C; Then, a point three phases adds surface active component, and the amount that first time adds is 20% of total amount (surface active component total mass), stir 10min, the amount that second time adds is 50% of total amount, stirs 15min, the amount that 3rd ground adds is 30% of total amount, stirs 20min; Finally, close agitator kettle heating unit, make agitator kettle temperature be reduced to room temperature, continue Keep agitation 30min in the process, obtain described surface active rubber powder.
B) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: the mass ratio of linked=100:15:6.0:2.0:1.5:4.8:0.1 takes each raw material.
C) matrix pitch is heated to 165 DEG C, and opens high-speed shearing machine; After gradually rotating speed being risen to 2000r/min, add weather-proof component, continue to shear 10min; Keep shearing rotating speed constant, add adhesion promoting component, continue to shear 5min; Promote velocity of shear to 6000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 40min; Reduce velocity of shear to 3000r/min, add linked, continue to shear 40min; Above shear history control temperature is between 185 ~ 190 DEG C.
D) after shear history completes, by sample as growth 30min swelling in 140 DEG C of baking ovens; Take out sample in an oven, after cooling, obtain the described high-viscosity high-elasticity asphalt based on rubber particle surface modification.
The high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification that the present embodiment obtains are as described in Table 14:
The obtained high-viscosity high-elasticity asphalt performance index based on rubber particle surface modification of table 14 embodiment 5
| Test event | Unit | Index request | Technical indicator |
| Softening temperature | ℃ | ≥90 | 92.6 |
| 5 DEG C of ductilities | cm | ≥40 | 60.1 |
| 25 DEG C of recovery of elasticity | ％ | ≥95 | 98.8 |
| Sticky toughness | N·m | ≥25 | 32.2 |
| 60 DEG C of viscosity | Pa·s | ≥70000 | 92700 |
2) high-viscosity high-elasticity SMA asphalt
The above-mentioned obtained high-viscosity high-elasticity asphalt based on rubber particle surface modification is applied to and prepares asphalt, with coarse aggregate, (diabase gathers materials described high-viscosity high-elasticity asphalt compound, crush values 8.2%), fine aggregate (basalt aggregate), filler (the strong subsiliceous rock in magmatite is levigate the breeze obtained), fiber (trevira), high-viscosity high-elasticity asphalt (high-viscosity high-elasticity asphalt based on rubber particle surface modification) and viscosity regulation component (sodium silicoaluminate) be prepared from for raw material, concrete preparation process is as follows:
A) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: the mass ratio of viscosity regulation component=75:10.3:10.5:0.4:6.4:8.3 takes each raw material, and the formate gradation composition of coarse aggregate, fine aggregate, filler meets the requirement of table 15.
B) first, coarse aggregate, fine aggregate are heated 5h in 190 DEG C of baking ovens, high-viscosity high-elasticity asphalt is heated 3.5h in 165 DEG C of baking ovens; Then, be sequentially added into coarse aggregate respectively, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber, viscosity regulation component add in the agitator kettle of 160 DEG C, stir 120s, the high-viscosity high-elasticity SMA asphalt taking out described, then at 160 DEG C of roller-compactions, high-viscosity high-elasticity SMA bituminous concrete is obtained.
The formate gradation composition of the high-viscosity high-elasticity SMA bituminous concrete that the present embodiment obtains is as shown in Table 15, and its performance index are shown in table 16.
The grading limit of high-viscosity high-elasticity SMA asphalt described in table 15 embodiment 5
The performance index of table 16 embodiment 5 gained high-viscosity high-elasticity SMA asphalt
| Performance perameter | Unit | Index request | Technical indicator |
| Voidage | ％ | 3～4 | 3.6 |
| 60 DEG C of dynamic stabilities | Secondary/mm | >8000 | 9258 |
| Immersion residual stability | ％ | ≥90 | 92.6 |
| Freeze-thaw split strength ratio | ％ | ≥85 | 92.9 |
| The maximum flexural-tensile strain of low temperature | με | ≥3000 | 3678 |
The above results shows: the viscoelastic property of the high-viscosity high-elasticity asphalt adopting rubber powder surface activation techniques to prepare promotes, temperature sensitivity reduces, the high-viscosity high-elasticity SMA asphalt concrete material high temperature stability performance adopting this pitch to prepare, water stabilizing, crack resistance at low-temperature are excellent, have significant technical advance and novelty.
The foregoing is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, make some improvement and conversion, these all belong to protection scope of the present invention.
Claims (10)
1. the high-viscosity high-elasticity asphalt based on rubber particle surface modification, it is characterized in that, it is with matrix pitch, activating rubber powder, weather-proof component, adhesion promoting component, plasticizing component, increase-volume component and linked for raw material is prepared from, and the mass ratio between each component is: matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: linked=100:(15 ~ 20): (4 ~ 6): (2 ~ 4): (1 ~ 3): (1 ~ 5): (0.1 ~ 1).
2. high-viscosity high-elasticity asphalt according to claim 1, it is characterized in that, described activating rubber powder by rubber powder and surface active component with 100:(5 ~ 30) mass ratio form through surface active, concrete preparation process is: rubber powder is stirred 30 ~ 120s at 40 ~ 60 DEG C; Then divide three times and add surface active component, each add-on is 10 ~ 70% of surface active component total mass, each stirring 5 ~ 20min, the amount added depends on and flows down without too much surface active component at the bottom of agitator kettle, and rubber grain is without the agglomerating phenomenon of serious bonding simultaneously; Finally be cooled to room temperature, after this phase lasts stirs 30 ~ 60min, obtain described activating rubber powder.
3. high-viscosity high-elasticity asphalt according to claim 2, is characterized in that, described rubber powder is 40 orders or 80 order bias tire vulcanized rubber powders; Surface active component is aromatic base rubber oil, one or more in naphthenic rubber oil & fat hydrocarbon solvent oil mix in any proportion.
4. high-viscosity high-elasticity asphalt according to claim 2, is characterized in that, described matrix pitch is that 70# or 90# heavily hands over petroleum pitch; Weather-proof component is line style styrene-butadiene-styrene block copolymer; Adhesion promoting component is note olefine resin, one or more in Gum Rosin, C9 petroleum resin and C5 petroleum resin mix in any proportion; Plasticizing component is for facing phthalic acid dibutyl ester or facing phthalic acid dibutyl ester; Increase-volume component is furfural extract oil, second line of distillation extracts oil out, subtract one or more of extracting out in oil and aromatic hydrocarbon oil of three lines mixes in any proportion; Linked is sulphur or dicumyl peroxide.
5. the high-viscosity high-elasticity asphalt preparation method based on rubber particle surface modification described in any one of Claims 1 to 4, it is characterized in that, comprise the following steps: 1) by matrix pitch: activating rubber powder: weather-proof component: adhesion promoting component: plasticizing component: increase-volume component: linked=100:(15 ~ 20): (4 ~ 6): (2 ~ 4): (1 ~ 3): (1 ~ 5): the mass ratio of (0.1 ~ 1) takes each raw material; 2) matrix pitch is heated to 160 ~ 170 DEG C, opens high-speed shearing machine; Gradually rotating speed is promoted to 2000 ~ 3000r/min, then adds weather-proof component, continue shearing 10 ~ 20min; Keep shearing rotating speed constant, add adhesion promoting component, continue shearing 3 ~ 5min; Then promote velocity of shear to 5000 ~ 6000r/min, add activating rubber powder, plasticizing component, increase-volume component, continue high speed shear 20 ~ 40min; Reduce velocity of shear to 3000 ~ 4000r/min, add linked, continue shearing 20 ~ 40min; Above shear history control temperature is between 185 ~ 200 DEG C; 3) after shear history completes, by sample as growth 30 ~ 60min swelling in the baking oven of 135 ~ 145 DEG C; The high-viscosity high-elasticity asphalt cooling described.
6. the high-viscosity high-elasticity SAM asphalt based on rubber particle surface modification, it is characterized in that, it is with coarse aggregate, fine aggregate, filler, fiber, high-viscosity high-elasticity asphalt and viscosity regulation component for raw material, and the mass ratio between each component is: coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: viscosity regulation component=75:(10 ~ 15): (8 ~ 12): (0.2 ~ 0.4): (6.0 ~ 6.5): (6 ~ 10).
7. high-viscosity high-elasticity asphalt compound according to claim 6, is characterized in that, described viscosity regulation component is sodium silicoaluminate or sulphonated polystyrene.
8. high-viscosity high-elasticity SAM asphalt according to claim 6, is characterized in that, described high-viscosity high-elasticity asphalt is the high-viscosity high-elasticity asphalt based on rubber particle surface modification; Coarse aggregate is that basalt or diabase gather materials, crush values < 10%; Fine aggregate is that limestone, basalt or diabase gather materials; Filler is the levigate breeze obtained of strong subsiliceous rock in limestone mineral powder or magmatite; Fiber is polyacrylonitrile fibre or trevira.
9. high-viscosity high-elasticity SAM asphalt according to claim 6, it is characterized in that, in the formate gradation composition scope of described coarse aggregate, fine aggregate, filler, sieve aperture percent of pass mainly comprises: the 13.2mm sieve aperture 88 ~ 100% of SMA-13,4.75mm sieve aperture 20 ~ 26%, 2.36mm sieve aperture 16 ~ 22,0.075mm sieve aperture 10 ~ 12%; 16mm sieve aperture 88 ~ 100%, 4.75mm sieve aperture 20 ~ 24%, 2.36mm sieve aperture 15 ~ 20, the 0.075mm sieve aperture 10 ~ 12% of SMA-16.
10. the preparation method of the high-viscosity high-elasticity SAM asphalt based on rubber particle surface modification described in any one of claim 6 ~ 9, it is characterized in that, comprise the following steps: 1) by coarse aggregate: fine aggregate: filler: fiber: high-viscosity high-elasticity asphalt: viscosity regulation component=75:(10 ~ 15): (8 ~ 12): (0.2 ~ 0.4): (6.0 ~ 6.5): the mass ratio of (6 ~ 10) takes each raw material; 2) coarse aggregate, fine aggregate are heated 5 ~ 8h at 190 ~ 200 DEG C, high-viscosity high-elasticity asphalt is heated 3 ~ 4h at 160 ~ 170 DEG C; 3) add coarse aggregate, fine aggregate, high-viscosity high-elasticity asphalt, filler, fiber and viscosity regulation component successively, and stir 90 ~ 180s at 160 ~ 170 DEG C, obtain described high-viscosity high-elasticity SMA asphalt; Then roller-compaction at 160 ~ 170 DEG C, obtains described high-viscosity high-elasticity SMA bituminous concrete.
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