CN109777134A - A kind of high-modulus warm-mixed asphalt additive and its preparation method and application - Google Patents
A kind of high-modulus warm-mixed asphalt additive and its preparation method and application Download PDFInfo
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- CN109777134A CN109777134A CN201910095821.0A CN201910095821A CN109777134A CN 109777134 A CN109777134 A CN 109777134A CN 201910095821 A CN201910095821 A CN 201910095821A CN 109777134 A CN109777134 A CN 109777134A
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Abstract
The invention belongs to traffic engineering additive fields, are related to the preparation and its application of a kind of high-modulus warm-mixed asphalt additive.The additive is prepared using high-modulus warm mix host agent, thermoplastic elastomer (TPE), vegetable oil, crosslinking agent, coupling agent, antioxidant, antiager and tackifying resin as primary raw material by single-screw low-temperature extruding pelletization.High-modulus warm-mixing additive prepared by the present invention directly outer can be thrown in mixture, be suitable for the higher high-modulus asphalt pavement engineering of environmental requirement and winter low temperature construction environment；Have the characteristics that high-temperature behavior protrusion, dynamic modulus high and low temperature good toughness, anti-water damage property are excellent using asphalt prepared by the high-modulus warm-mixed asphalt additive, and 20-30 DEG C of the construction temperatures such as mixture mix and decking and rolling can be reduced, it realizes warm mix effect, is suitble to promote and apply.
Description
Technical field
The invention belongs to traffic engineering additive fields, and in particular to a kind of high-modulus warm-mixed asphalt additive and its preparation
Methods and applications.
Background technique
In recent years, following to occur with the rapid development of national economy and the continuous expansion of highway construction scale
Overload of vehicle, traction engine increase problem, make bituminous pavement damage get worse.High-modulus asphalt pavement technique is different from biography
The addition anti-rut agent of system improves road surface rutting resistance, is from road surface overall construction design, by promoting material synthesis
It is required that and road surface thickness is thinned to reach good engineering and economic benefit.
High-modulus asphalt pavement technique originates from the France in last century, to 15 DEG C of asphalt, 10Hz dynamic modulus
It proposes and clearly requires.China is studied from introducing high-modulus technology in 2001 by constantly groping, in material, construction work
Continuous technological progress has also been obtained in terms of skill and technical indicator, and has proposed 45 DEG C according to the climatic characteristic in China, 10Hz's
High temperature dynamic modulus is greater than the requirement of 2000MPa, and wherein high-temperature modulus can react pavement usage temperature and modulus improves
The contribution of road pavement structure.High-modulus asphalt road surface is in addition to the comprehensive performances such as excellent anti-rut behavior, water resistant damage, antifatigue
It has outstanding performance, has broad application prospects in special road sections such as highway, large longitudinal slope, intersection, deck pavings.
However, with the complexity of engineering-environment, in municipal administration, tunnel etc. to the demanding region of Environmental Safety, pitch smoke problems demand
It solves；Low-temperature construction environment in winter, normal high-modulus asphalt road surface are difficult to the compacting that paves, therefore special engineer application ring
All to high-modulus warm mix technology, more stringent requirements are proposed in border.
Currently, high-modulus asphalt road surface and warm-mixed asphalt technology are realized by asphalt modifier.China
Patent CN103102707B discloses a kind of high-modulus asphalt modifying agent, and granulation is blended by waste plastic and is prepared, although at
This is lower, preparation method is simple；But lack the related experiment and Performance Properties Evaluation of asphalt.CN104194366B is disclosed
A kind of low-temperature type high-modulus asphalt modifying agent and preparation method thereof overcomes waste plastics by cold machining process and rubber is total
The apparent problem of work process variations is mixed, the modifying agent high temperature performance of preparation is excellent；But application is limited, it is difficult to adapt to low
Warm construction environment.CN102976649B discloses a kind of waste rubber powder modified asphalt warm-mixing agent and preparation method thereof, the temperature of preparation
Mixing agent can obviously reduce the viscosity of rubber powder modified asphalt, reduce construction temperature；But the high-temperature behavior of modified pitch is promoted little.
CN107383907A discloses a kind of warm mix high-modulus asphalt modifying agent, preparation method and applications, is split by polymer beads
Solution preparation warm mix high-modulus host agent, the modifying agent of preparation still have excellent synthesis under the premise of reducing by 30 DEG C of forming temperature
Performance；But the preparation of warm mix high-modulus host agent is to the more demanding of equipment in the patent, and reaction temperature is very high, reaction is difficult to
Control.To sum up, although the problems such as above-mentioned modification technology can solve pitch high-modulus to a certain extent or reduce construction temperature,
It is difficult to meet the service performance requirement of high-modulus, warm mix and synthesis simultaneously.
Summary of the invention
It is a primary object of the present invention to add in view of the deficienciess of the prior art, providing a kind of high-modulus warm-mixed asphalt
Add agent, is modified gained High Temperature Stability of Asphalt Mixture protrusion, dynamic modulus high and low temperature good toughness, anti-water damage property using it
It is excellent, it can express excellent comprehensive performance, and the preparation method designed is simple, be suitble to promote and apply.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of high-modulus warm-mixed asphalt additive, each component and its shared parts by weight include:
Preferably, the high-modulus warm mix host agent is by polyethylene powder and polyethylene wax, Fischer-Tropsch wax, ethylene stearic bicine diester
Amine, pentaerythritol stearate, oleamide, at least three kinds in glyceryl monostearate be mixed to prepare, wherein polyethylene powder
Agent accounts for the 40-60% of high-modulus warm mix host agent gross mass.
Preferably, the thermoplastic elastomer (TPE) is the mixture of type SBS and star-shaped sbs, wherein quality shared by type SBS
Percentage is 70-80%.
Preferably, the tackifying resin is at least one of rosin resin, Petropols, terpene resin.
Preferably, the vegetable oil be epoxidized vegetable oil, can be selected epoxidized soybean oil, epoxy corn oil, epoxy rapeseed oil,
At least one of epoxy peanut oil.
Preferably, the coupling agent is amino silicane coupling agent, and it is even that mono amino silane coupling agent, double amino silanes can be selected
Join at least one of agent or triamido silane coupling agent.
Preferably, the antioxidant be four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters and/or
Three (2,4- di-t-butyl) phenyl-phosphites.
Preferably, the antiager is at least one of montmorillonite, nano silica, diatomite.
Preferably, the crosslinking agent is sulphur.
A kind of preparation method of above-mentioned high-modulus warm-mixed asphalt additive, includes the following steps:
1) each raw material is weighed according to the ratio；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is oil-filled to be placed in stirring at normal temperature progress in horizontal elastomer blender
Processing, standing obtain oil-extended thermoplastic's property elastomer；
3) by weighed high-modulus warm mix host agent, tackifying resin, coupling agent, antioxidant, antiager, crosslinking agent in blender
Middle carry out mixing；
4) oil-extended thermoplastic's property elastomer is added in mixed powder obtained by step 3), mix is carried out in blender, then
Single screw extrusion machine progress extruding pelletization is added and obtains the high-modulus warm-mixed asphalt additive.
In above scheme, Oil treatment time described in step 2) is 1-3h；Time of repose is 4-8h.
In above scheme, temperature that the extruding pelletization uses is between 40~100 DEG C.
The present invention also provides a kind of applications of high-modulus warm-mixed asphalt additive, are added using above-mentioned high-modulus warm-mixed asphalt
Agent is added to prepare modified asphalt mixture, it includes high-modulus warm-mixed asphalt additive, SBS pitch, is gathered materials and miberal powder, wherein Gao Mo
Measuring mass percent shared by warm-mixed asphalt additive is 0.2~0.4%.
A kind of preparation method of above-mentioned modified asphalt mixture, it includes the following steps:
By high-modulus warm-mixed asphalt additive, gather materials and first mix mix in pot at 160~180 DEG C, SBS pitch is added and continues to mix
It closes, is eventually adding miberal powder and stirs up to modified asphalt mixture.Wherein the bitumen aggregate ratio of used AC20 asphalt is fixed,
The high-modulus warm-mixed asphalt additive accounts for the 0.2-0.4% of mixture total mass；Gather materials, 160~180 DEG C of miberal powder heating temperature
Left and right, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature.
And for not additivated benchmark mixture, (will gather materials the first mix in mixing pot, and SBS pitch is added and continues to mix
It closes, is eventually adding miberal powder and stirs to obtain benchmark asphalt；Wherein the bitumen aggregate ratio of used AC20 asphalt is fixed),
It gathers materials, the heating temperature of miberal powder is 180 DEG C, and 160 DEG C of SBS asphalt heating temperature, guarantee mix drop temperature is 160 DEG C of left sides
It is right.
The construction temperature such as mixture mix and decking and rolling can be reduced using high-modulus warm-mixed asphalt additive of the present invention
20-30 DEG C of degree；Suitable for the projects under construction such as the high municipal administration of environmental requirement, tunnel and winter low temperature construction environment.
The principle of the present invention are as follows:
Ingredient design: the present invention is with high-modulus warm mix host agent, thermoplastic elastomer (TPE), epoxidized vegetable oil and hybrid reaction auxiliary agent
Deng for primary raw material, high-modulus warm-mixed asphalt additive is prepared by single-screw low-temperature extruding pelletization: the polyethylene that wherein uses,
The material softenings such as polyethylene wax point is high, and the high-modulus warm mix host agent of composition is conducive to improve mixture high-temperature behavior and dynamic analog
Amount；The low melting points such as pentaerythritol stearate, Fischer-Tropsch wax can obviously reduce asphalt viscosity, make mix and decking and rolling temperature
20-30 DEG C of subnormal temperature；By adjusting the ratio of high-melting-point and low-melting component, high-temperature behavior and warm mix can be effectively taken into account
Effect；The thermoplastic elastomer (TPE) and epoxidized vegetable oil of use have excellent low temperature properties, can play synergistic effect and be obviously improved and change
The cryogenic property of property pitch, and with high-modulus warm mix host agent mating reaction, take into account high-temperature behavior and cryogenic property；Furthermore epoxy is planted
PART EPOXY base on object oil can issue with the amino on amino silicane coupling agent in the hot conditions of asphalt mixing biochemical
Pitch, modifying agent and the efficient adherency gathered materials are realized in reaction, and the water resistant for further promoting modified pitch damages performance；Montmorillonite is received
The addition of the antiagers such as rice silica can form intercalation synthesis structure or nano modification to pitch, can obviously improve pitch
Anti-aging property；The introducing of crosslinking agent can further improve the compatibility of modifying agent and pitch and promote the high/low temperature of modified pitch
Comprehensive performance.
Process modification: additive of the present invention is by the way that cotton-shaped to thermoplastic elastomer (TPE) and powder granule shifts to an earlier date oil-filled place
Reason can sufficiently be swollen, improve the compatibility with pitch in oil suction；Friendship is introduced in material system using low temperature extruding and pelletizing process
Conjuncted system, so guarantee be granulated process be not crosslinked and in asphalt modification stage crosslinked；The content of crosslinking agent is controlled simultaneously
It is lower and crosslinking accelerator cannot be added, the increase for causing asphalt viscosity during asphalt mixing is prevented, is further implemented in
Bitumen transportation and the slow crosslinking after paving；In addition, extrusion equipment uses single screw rod extruding pelletization rather than double screw extruder, have
When effect overcomes double screw extruder to process under cryogenic, material plasticizing is insufficient, and the resistance ratios between twin-screw are larger, difficult
To guarantee normal the problems such as squeezing out.
Compared with prior art, the invention has the benefit that
1) present invention gained high-modulus warm-mixed asphalt additive is conducive to be promoted the comprehensive performance of asphalt, high temperature
Performance protrusion, dynamic modulus high and low temperature good toughness, water resistant damage are had excellent performance；And pitch smoke can be reduced and extend pavement construction
Season realizes warm mix purpose, effectively takes into account high-modulus, warm mix and comprehensive service performance requirement.
2) present invention is using low temperature extruding and pelletizing process, the slow crosslinking after can effectively realizing bitumen transportation and pave, into
One step improves the service performance of gained asphalt；And the reaction condition being related to is mild, has significant energy consumption benefit.
Specific embodiment
For a better understanding of the present invention, below with reference to the embodiment content that the present invention is furture elucidated, but it is of the invention
Content is not limited solely to the following examples.
In following embodiment, adding in Asphalt Mixture Experiment or do not add high-modulus warm-mixed asphalt additive does not influence oil
Stone ratio, therefore fix level is matched and bitumen aggregate ratio, variation high-modulus warm-mixed asphalt additive material composition, volume and mix condition；Its
In, bitumen aggregate ratio is defined as the percentage of SBS asphalt and aggregate and miberal powder three's gross mass, and the SBS pitch of use is mentioned by South Korea SK
For gathering materials for basalt building stones；Miberal powder is limestone dust；Bitumen aggregate ratio is fixed as 4.6, and specific gradation information is shown in Table 1.
1 gradation information of table
The preparation method of not additivated benchmark mixture specifically comprises the following steps: the first mix in mixing pot that will gather materials
30s is added SBS pitch and continues mix 90s, is eventually adding miberal powder stirring 90s to get benchmark asphalt.Wherein, use
Bitumen aggregate ratio is 4.6；Gather materials, miberal powder heating temperature is 180 DEG C, SBS asphalt heating temperature is 160 DEG C, and guarantees that mix goes out material temperature
Degree is 160 DEG C or so.
Embodiment 1
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: 100 parts of (its of high-modulus warm mix host agent
50 parts of middle polyethylene powder, 10 parts of polyethylene wax, 15 parts of ethylene bis stearamide, 25 parts of pentaerythritol stearate), thermoplasticity
40 parts of elastomer (28 parts of type SBS, 12 parts of star-shaped sbs), 60 parts of epoxidized soybean oil, 10 parts of terpene resin, monoamine base silane are even
Join 3 parts of agent, three 1 part of (2,4- di-t-butyl) phenyl-phosphite antioxidant, 2 parts of montmorillonite, 0.5 part of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 2h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 6h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 5min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 5min in low-speed mixer, be then added
(extruder screw draw ratio is 20:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 60 DEG C of cryogenic conditions
100rpm), the high-modulus warm-mixed asphalt additive is obtained.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 180 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s to get modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.25% (gathers materials, 180 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 2.
The correlated performance test result of additive modification asphalt mixture described in 2 embodiment 1 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.409 | 2.404 |
| Marshall stability (KN) | 14.5 | 16.6 | 14.9 |
| It soaks residual stability (%) | 81.1 | 87.2 | 84.9 |
| Freeze-thaw split (%) | 75.9 | 84.5 | 80.3 |
| Dynamic stability (secondary/mm) | 4000 | 10000 | 8000 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2390 | 2100 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2500 | 2250 |
Embodiment 2
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: 100 parts of (its of high-modulus warm mix host agent
50 parts of middle polyethylene powder, 15 parts of ethylene bis stearamide, 20 parts of oleamide, 15 parts of glyceryl monostearate), thermoplastic elastomehc
Property 80 parts of body (64 parts of type SBS, 16 parts of star-shaped sbs), 60 parts of epoxy peanut oil, 8 parts of Petropols, double amino silanes coupling
5 parts of agent, four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] 2 parts of pentaerythritol esters, 3 parts of nano silica, sulphur
1.0 part；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 3h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 5h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 5min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 3min in low-speed mixer, be then added
Single screw extrusion machine extruding pelletization (extruder screw draw ratio is 28:1, screw speed 50rpm) under 80 DEG C of cryogenic conditions,
Obtain the high-modulus warm-mixed asphalt additive.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 170 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s to get modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.3% (gathers materials, 170 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 3.
The correlated performance test result of additive modification asphalt mixture described in 3 embodiment 2 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.411 | 2.406 |
| Marshall stability (KN) | 14.5 | 17.1 | 15.6 |
| It soaks residual stability (%) | 81.1 | 88.2 | 85.1 |
| Freeze-thaw split (%) | 75.9 | 84.7 | 80.6 |
| Dynamic stability (secondary/mm) | 4000 | 11500 | 8500 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2460 | 2100 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2730 | 2370 |
Embodiment 3
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: that 100 parts of high-modulus warm mix host agent is (poly-
60 parts of ethylene pulvis, 10 parts of Fischer-Tropsch wax, 5 parts of ethylene bis stearamide, 10 parts of pentaerythritol stearate, 15 parts of oleamide),
60 parts of thermoplastic elastomer (TPE) (45 parts of type SBS, 15 parts of star-shaped sbs), 30 parts of epoxy corn oil, 50 parts of epoxy rapeseed oil, terpenes
10 parts of resin, 3 parts of triamido silane coupling agent, three 5 parts of (2,4- di-t-butyl) phenyl-phosphite antioxidant, 3 parts of diatomite, sulphur
1.5 parts of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 1h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 7h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 4min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 5min in low-speed mixer, be then added
(extruder screw draw ratio is 25:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 40 DEG C of cryogenic conditions
200rpm), the high-modulus warm-mixed asphalt additive is obtained.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 160 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s to get modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.2% (gathers materials, 160 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 4.
The correlated performance test result of additive modification asphalt mixture described in 4 embodiment 3 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.407 | 2.403 |
| Marshall stability (KN) | 14.5 | 16.1 | 14.5 |
| It soaks residual stability (%) | 81.1 | 86.7 | 84.5 |
| Freeze-thaw split (%) | 75.9 | 83.6 | 80.5 |
| Dynamic stability (secondary/mm) | 4000 | 8900 | 7300 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2300 | 1850 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2610 | 2230 |
Embodiment 4
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: that 100 parts of high-modulus warm mix host agent is (poly-
50 parts of ethylene pulvis, 15 parts of polyethylene wax, 10 parts of ethylene bis stearamide, 25 parts of pentaerythritol stearate), thermoplastic elastic
50 parts of body (35 parts of type SBS, 15 parts of star-shaped sbs), 50 parts of epoxidized soybean oil, 5 parts of rosin resin, mono amino silane coupling agent 3
Part, four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] 3 parts of pentaerythritol esters, 1 part of montmorillonite, 0.8 part of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 2h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 8h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 5min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 5min in low-speed mixer, be then added
(extruder screw draw ratio is 30:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 65 DEG C of cryogenic conditions
100rpm), the high-modulus warm-mixed asphalt additive is obtained.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 180 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s to get modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.4% (gathers materials, 180 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 5.
The correlated performance test result of additive modification asphalt mixture described in 5 embodiment 4 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.410 | 2.406 |
| Marshall stability (KN) | 14.5 | 17.8 | 16.5 |
| It soaks residual stability (%) | 81.1 | 86.3 | 84.9 |
| Freeze-thaw split (%) | 75.9 | 84.1 | 81.5 |
| Dynamic stability (secondary/mm) | 4000 | 13000 | 10000 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2500 | 2250 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2490 | 2210 |
Embodiment 5
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: that 100 parts of high-modulus warm mix host agent is (poly-
45 parts of ethylene pulvis, 10 parts of polyethylene wax, 10 parts of ethylene bis stearamide, 35 parts of oleamide), 60 parts of thermoplastic elastomer (TPE)
(48 parts of type SBS, 12 parts of star-shaped sbs), 80 parts of epoxy rapeseed oil, 8 parts of rosin resin, 3 parts of triamido silane coupling agent, three
3 parts of (2,4- di-t-butyl) phenyl-phosphite antioxidant, 1 part of montmorillonite, 0.5 part of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is oil-filled to be placed in stirring at normal temperature in horizontal elastomer blender
1.5h is then allowed to stand 6.5h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 4min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 4min in low-speed mixer, be then added
(extruder screw draw ratio is 25:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 50 DEG C of cryogenic conditions
150rpm), the high-modulus warm-mixed asphalt additive is obtained.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 180 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s up to modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.3% (gathers materials, 175 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 6.
The correlated performance test result of additive modification asphalt mixture described in 6 embodiment 5 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.411 | 2.406 |
| Marshall stability (KN) | 14.5 | 16.8 | 15.5 |
| It soaks residual stability (%) | 81.1 | 86.1 | 84.5 |
| Freeze-thaw split (%) | 75.9 | 84.3 | 81.2 |
| Dynamic stability (secondary/mm) | 4000 | 10500 | 8000 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2380 | 2190 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2790 | 2490 |
Embodiment 6
A kind of high-modulus warm-mixed asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: that 100 parts of high-modulus warm mix host agent is (poly-
55 parts of ethylene pulvis, 5 parts of polyethylene wax, 25 parts of ethylene bis stearamide, 15 parts of pentaerythritol stearate), thermoplastic elastic
60 parts of body (42 parts of type SBS, 18 parts of star-shaped sbs), 50 parts of epoxidized soybean oil, 8 parts of Petropols, double amino silicane coupling agents 5
Part, four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] 4 parts of pentaerythritol esters, 2 parts of montmorillonite, 1.5 parts of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 3h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 6h, obtains oil-extended thermoplastic's property elastomer；
3) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 5min；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 3min in low-speed mixer, be then added
(extruder screw draw ratio is 28:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 70 DEG C of cryogenic conditions
120rpm), the high-modulus warm-mixed asphalt additive is obtained.
Application examples
High-modulus warm-mixed asphalt additive obtained by the present embodiment is applied to prepare modified asphalt mixture, specifically include as
Lower step: by high-modulus warm-mixed asphalt additive, gather materials and first mix mix 30s in pot at 180 DEG C, SBS pitch is added and continues mix
90s is eventually adding miberal powder stirring 90s up to modified asphalt mixture.The wherein bitumen aggregate ratio of used AC20 asphalt
It is 4.6, what the high-modulus warm-mixed asphalt additive accounted for mixture total mass 0.3% (gathers materials, 180 DEG C of left sides of miberal powder heating temperature
The right side, guarantees that mix drop temperature is 130~140 DEG C or so by 160 DEG C of SBS asphalt heating temperature).
The mixture for increasing modulus warm-mixed asphalt additive is prepared into marshal piece in 130 DEG C and 140 DEG C of compactings respectively
And bulk density is tested, the benchmark mixture that high-modulus warm-mixing additive is not added is hit at 160 DEG C prepares marshal piece in fact, right
The test result answered is shown in Table 7.
The correlated performance test result of additive modification asphalt mixture described in 7 embodiment 6 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.408 | 2.402 |
| Marshall stability (KN) | 14.5 | 17.2 | 16.8 |
| It soaks residual stability (%) | 81.1 | 87.1 | 85.2 |
| Freeze-thaw split (%) | 75.9 | 84.2 | 81.8 |
| Dynamic stability (secondary/mm) | 4000 | 11900 | 9000 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2450 | 2175 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2450 | 2180 |
Above-mentioned test result shows: the data such as dynamic stability, Marshall stability, dynamic modulus illustrate that gained is modified respectively
Asphalt has good high temperature resistance；Low-temperature bending failure strain illustrates that gained modified asphalt mixture has respectively
Good low-temperature flexibility；Immersion residual stability and indirect tensile test on frozen-thaw show that gained modified asphalt mixture has excellent resist
Water damages performance；The bulk density variation of different forming temperature marshal pieces shows that high-modulus warm mix modifying agent, which is added, to be reduced
20-30 DEG C of forming temperature.
Comparative example 1
A kind of asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: 100 parts of (its of high-modulus warm mix host agent
50 parts of middle polyethylene powder, 15 parts of ethylene bis stearamide, 20 parts of oleamide, 15 parts of glyceryl monostearate), Petropols
8 parts, 5 parts of double amino silicane coupling agents, four [β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol esters 2 part, nanometer
3 parts of silica, 1.0 parts of sulphur；
2) weighed high-modulus warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent are mixed in low-speed mixer
Expect 5min, single screw extrusion machine is then added, and (extruder screw draw ratio is 28:1, spiral shell to extruding pelletization under 80 DEG C of cryogenic conditions
Bar revolving speed is 50rpm) to get the asphalt additive.
Application examples
Asphalt additive obtained by this comparative example is applied to prepare modified asphalt mixture, specifically comprise the following steps: by
Comparison asphalt additive gathers materials and first mixes mix 30s in pot at 170 DEG C, and SBS pitch is added and continues mix 90s, is eventually adding miberal powder
90s is stirred up to modified asphalt mixture.Wherein the bitumen aggregate ratio of used AC20 asphalt is 4.6, the comparison drip
Green additive account for mixture total mass 0.3% (gather materials, 170 DEG C of miberal powder heating temperature or so, SBS asphalt heating temperature 160
DEG C, guarantee that mix drop temperature is 130~140 DEG C or so).
The mixture for adding asphalt additive described in this comparative example is prepared into Marshall in 130 DEG C and 140 DEG C of compactings respectively
Test specimen simultaneously tests bulk density, and the benchmark mixture that comparative additive is not added is hit at 160 DEG C prepares marshal piece in fact, corresponding
Test result be shown in Table 3.
The correlated performance test result of additive modification asphalt mixture described in 8 comparative example 1 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.412 | 2.407 |
| Marshall stability (KN) | 14.5 | 16.5 | 14.6 |
| It soaks residual stability (%) | 81.1 | 83.2 | 81.2 |
| Freeze-thaw split (%) | 75.9 | 79.7 | 78.6 |
| Dynamic stability (secondary/mm) | 4000 | 10000 | 8000 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2310 | 2075 |
| Low-temperature bending failure strain (μ ε) | 1890 | 1930 | 1870 |
As can be seen from Table 8, though can express using asphalt additive agent modified obtained by this comparative example certain
Warm mix effect, but there are a degree of reductions for high-temperature behavior, dynamic modulus and water resistant damage performance, and cryogenic property reduction is bright
It is aobvious.
Comparative example 2
A kind of asphalt additive, preparation method include the following steps:
1) each raw material is weighed according to the ratio, and each raw material and its shared parts by weight include: that (ethylene is double hard for 100 parts of warm mix host agent
25 parts of acyl amine, 75 parts of pentaerythritol stearate), 50 parts of thermoplastic elastomer (TPE) (35 parts of type SBS, 15 parts of star-shaped sbs),
50 parts of epoxidized soybean oil, 5 parts of rosin resin, 3 parts of mono amino silane coupling agent, four [β-(3,5- di-tert-butyl-hydroxy phenyl)
Propionic acid] 3 parts of pentaerythritol ester, 1 part of montmorillonite, 0.8 part of sulphur；
2) by weighed thermoplastic elastomer (TPE) and vegetable oil, it is placed in the oil-filled 2h of stirring at normal temperature in horizontal elastomer blender,
It is then allowed to stand 8h, obtains oil-extended thermoplastic's property elastomer；
3) by weighed warm mix host agent, coupling agent, antioxidant, antiager, crosslinking agent mixing 5min in low-speed mixer；
4) oil-extended thermoplastic's property elastomer is added into second step powder and stirs 5min in low-speed mixer, be then added
(extruder screw draw ratio is 30:1 to extruding pelletization to single screw extrusion machine, and screw speed is under 65 DEG C of cryogenic conditions
100rpm), the comparison asphalt additive is obtained.
Application examples
Asphalt additive obtained by this comparative example is applied to prepare modified asphalt mixture, specifically includes following step
It is rapid: will comparison asphalt additive, gather materials and first mix mix 30s in pot at 180 DEG C, SBS pitch is added and continues mix 90s, finally plus
Enter miberal powder stirring 90s to get modified asphalt mixture.Wherein the bitumen aggregate ratio of used AC20 asphalt is 4.6, described
Comparison asphalt additive account for mixture total mass 0.4% (gather materials, 180 DEG C of miberal powder heating temperature or so, SBS pitch heating temperature
160 DEG C of degree guarantees that mix drop temperature is 130~140 DEG C or so).
The mixture for adding asphalt additive obtained by this comparative example is prepared into Marshall in 130 DEG C and 140 DEG C of compactings respectively
Test specimen simultaneously tests bulk density, and the benchmark mixture that the additive is not added is hit at 160 DEG C prepares marshal piece in fact, corresponding
Test result is shown in Table 5.
The correlated performance test result of additive modification asphalt mixture described in 9 comparative example 2 of table
| Test item | 160 DEG C of benchmark moldings | 140 DEG C of doping moldings | 130 DEG C of doping moldings |
| Bulk density | 2.405 | 2.412 | 2.406 |
| Marshall stability (KN) | 14.5 | 15.1 | 14.0 |
| It soaks residual stability (%) | 81.1 | 85.7 | 84 |
| Freeze-thaw split (%) | 75.9 | 83.9 | 82.1 |
| Dynamic stability (secondary/mm) | 4000 | 8100 | 6530 |
| Dynamic modulus (45 DEG C, 10Hz, MPa) | 1400 | 2100 | 1750 |
| Low-temperature bending failure strain (μ ε) | 1890 | 2195 | 2070 |
The above results show: though it can express certain temperature using asphalt additive agent modified obtained by this comparative example
Effect is mixed, but high-temperature behavior and dynamic modulus are declined.
To sum up, present invention gained high-modulus warm-mixed asphalt additive can take into account the various aspects of performance of asphalt, and can
It is directly outer to throw in mixture, suitable for the high high-modulus asphalt pavement engineering of environmental requirement and winter low temperature construction environment.
The above is only a preferred embodiment of the present invention, it is noted that come for those of ordinary skill in the art
It says, without departing from the concept of the premise of the invention, several modifications and variations can also be made, belong to protection of the invention
Range.
Claims (10)
1. a kind of high-modulus warm-mixed asphalt additive, each component and its shared parts by weight include:
2. high-modulus warm-mixed asphalt additive according to claim 1, which is characterized in that the high-modulus warm mix host agent by
Polyethylene powder and polyethylene wax, Fischer-Tropsch wax, ethylene bis stearamide, pentaerythritol stearate, oleamide, stearic acid list
At least three kinds in glyceride are mixed to prepare, and wherein polyethylene powder accounts for the 40-60% of high-modulus warm mix host agent gross mass.
3. high-modulus warm-mixed asphalt additive according to claim 1, which is characterized in that the thermoplastic elastomer (TPE) is line
The mixture of type SBS and star-shaped sbs, wherein mass percent shared by type SBS is 70-80%.
4. high-modulus warm-mixed asphalt additive according to claim 1, which is characterized in that the tackifying resin is rosin tree
At least one of rouge, Petropols, terpene resin.
5. high-modulus warm-mixed asphalt additive according to claim 1, which is characterized in that the vegetable oil is epoxy plant
Oil；The coupling agent is amino silicane coupling agent.
6. high-modulus warm-mixed asphalt additive according to claim 1, which is characterized in that the antioxidant be four [β-(3,
5- di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and/or three (2,4- di-t-butyl) phenyl-phosphites；It is described anti-ageing
Agent is at least one of montmorillonite, nano silica, diatomite；The crosslinking agent is sulphur.
7. the preparation method of any one of the claim 1~6 high-modulus warm-mixed asphalt additive, which is characterized in that including such as
Lower step:
1) each raw material is weighed according to the ratio；
2) it by weighed thermoplastic elastomer (TPE) and vegetable oil, is placed in stirring at normal temperature in horizontal elastomer blender and carries out oil-filled place
Reason, standing obtain oil-extended thermoplastic's property elastomer；
3) by weighed high-modulus warm mix host agent, tackifying resin, coupling agent, antioxidant, antiager, crosslinking agent in low-speed mixer
Middle carry out mixing；
4) oil-extended thermoplastic's property elastomer is added in mixed powder obtained by step 3), mix is carried out in low-speed mixer, then
Single screw extrusion machine progress extruding pelletization is added and obtains the high-modulus warm-mixed asphalt additive.
8. preparation method according to claim 7, which is characterized in that the Oil treatment time is 1-3h.
9. preparation method according to claim 7, which is characterized in that the temperature that the extruding pelletization uses is 40~100
Between DEG C.
10. claim 1~6 is described in any item or high-modulus warm mix is made in any one of claim 7~9 preparation method
The application of asphalt additive, which is characterized in that applied to preparing in modified asphalt mixture, wherein high-modulus warm-mixed asphalt is added
The additive amount of agent is the 0.2~0.4% of modified asphalt mixture gross mass.
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