CN105440713B - A kind of pitch blended stock performance enhancers and preparation method thereof - Google Patents
A kind of pitch blended stock performance enhancers and preparation method thereof Download PDFInfo
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- CN105440713B CN105440713B CN201610052002.4A CN201610052002A CN105440713B CN 105440713 B CN105440713 B CN 105440713B CN 201610052002 A CN201610052002 A CN 201610052002A CN 105440713 B CN105440713 B CN 105440713B
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- 239000012744 reinforcing agent Substances 0.000 claims abstract description 63
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/15—Heterocyclic compounds having oxygen in the ring
- C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
- C08K5/1535—Five-membered rings
- C08K5/1539—Cyclic anhydrides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The present invention relates to a kind of pitch blended stock performance enhancers and preparation method thereof, belong to pavement material technical field.The invention discloses a kind of performance of asphalt mixture reinforcing agents, are made of rock asphalt and outer-penetrating agent, and the mass ratio of rock asphalt and outer-penetrating agent is more than 9：1.The performance of asphalt mixture reinforcing agent is prepared the present invention also provides a kind of.Mixture performance reinforcing agent provided by the present invention, which easily melts, to be distributed in pitch blended stock, and the performance improvement efficiency to pitch blended stock can be given full play to, and while keeping high temperature stability performance, also has better water stability and low-temperature cracking-resistance.
Description
Technical field
The present invention relates to a kind of pitch blended stock performance enhancers and preparation method thereof, and in particular to rock asphalt and outer-penetrating agent
The pitch blended stock performance enhancers being mixed with and preparation method thereof, belong to pavement material technical field.
Background technology
The mineral deposit of rock asphalt is due to crustal movement, fracture so that the crude oil contained in crust depth constantly pours into ground
Table passes through millions upon millions of years time, in temperature, pressure, sunshine, gas, inorganic matter catalyst, microorganism and water under field conditions (factors)
Bitumen made of oxidation polymerization under the comprehensive function divided.
The test of extreme natural environment in nature and is subjected to due to long-term existence, the property of rock asphalt is extremely stable,
Ageing-resistant performance protrudes.Rock asphalt is bitumen, is not used directly usually, but as modified material and matrix pitch, collection
Material mixing is mixed and is matched, and the pavement performance of matrix pitch is improved.Rock asphalt is all the derivative of oil as matrix pitch, with
Segregation phenomenon is not present when having extraordinary compatibility and matrix pitch to mix between matrix pitch.As matrix pitch
Performance enhancers are far superior to the compatibility of polymer performance reinforcing agent and matrix pitch with the compatibility of matrix pitch.This
Outside, the main component of miberal powder is limestone in rock asphalt, and particle is superfine and with the ability of fairly good absorption pitch, has
Reinforce the effect of the adhesiveness of asphalt and aggregate.Therefore, rock asphalt or rock asphalt mixture is used alone to carry out asphalt
It is modified, by it with asphalt making on road surface, high-temperature behavior, the water resistant on road surface on the one hand can be improved to a certain extent
Performance and anti-fatigue performance are damaged, but modified effect is very limited, another aspect cryogenic property allows of no optimist, the addition of rock asphalt
Amount is much bigger to cryogenic property destruction.So currently, there is the lower additive of rock asphalt mass percentage content, it is only capable of improving
The high-temperature stability of asphalt, and the problems such as mixture water stability is low, crack resistance at low-temperature is poor can not be effectively improved.Cause
This, there is an urgent need for develop one kind to realize high-temperature stability and realize the rock asphalt reinforcing agent of crack resistance at low-temperature.
Invention content
The purpose of the present invention is being directed to, water stability existing for existing pitch blended stock performance enhancers is low, low-temperature cracking-resistance
The problem of energy difference, it is proposed that a kind of by fine and closely woven uniform rock asphalt particle (bitumen content >=15%, grain diameter≤5mm) and outer
Performance of asphalt mixture reinforcing agent made of agent mixes is mixed, this mixture performance reinforcing agent, which easily melts, is distributed in pitch blended stock
In, the performance improvement efficiency to pitch blended stock can be given full play to, while keeping high temperature stability performance, is also had better
Water stability and low-temperature cracking-resistance.
To achieve the above object, the present invention uses following technical scheme：
A kind of performance of asphalt mixture reinforcing agent, is made of rock asphalt and outer-penetrating agent, the quality of rock asphalt and outer-penetrating agent it
Than being more than 9：1.
The outer-penetrating agent mainly include plastics, fiber, rubber, resin it is one or more.Wherein, fiber can be natural
Fiber can also be chemical synthetic fiber, preferably lignocellulosic or ground carbon fiber；Rubber can be natural rubber or synthesis
Rubber, preferably butadiene-styrene rubber or neoprene；The preferred low density polyethylene (LDPE) of resin, linear low density polyethylene or polyvinyl alcohol contracting
Butyraldehyde.
Can also include grafting agent in the outer-penetrating agent, grafting agent selects maleic anhydride or fumaric acid anhydride, the matter of grafting agent
Amount percentage composition accounts for the 1% of reinforcing agent gross mass.
In the rock asphalt, asphalt quality percentage composition is more than or equal to 15%, and softening point is more than 45 DEG C.
The present invention also provides a kind of preparation methods of the performance of asphalt mixture reinforcing agent：
Rock asphalt is broken into particle, grain diameter≤5mm first；Then it is total to be dried to wherein biodiversity≤rock asphalt
The 2% of quality, then it is more than 9 in mass ratio with outer-penetrating agent particle (grain size≤5mm)：1 mixing is mixed thoroughly to get to asphalt
It can reinforcing agent.
The present invention be directed to problem of the prior art, by rock asphalt mass percentage content in reinforcing agent creatively improve to
90% or more, then the addition by matching rational other components, efficiently solve that mixture water stability is low, anti-low-temperature cracking
The problems such as poor performance, and high-temperature stability can be made greatly to be improved.
Testing result show asphalt using reinforcing agent provided by the invention with without the reinforcing agent pitch or
Asphalt is compared, and has better high-temperature stability, water stability, crack resistance at low-temperature；And the present invention is used in outer-penetrating agent
Measure it is less in the case of can realize better high-temperature stability, water stability, crack resistance at low-temperature, not only saved cost, also
Reduce the environmental pollution brought by outer-penetrating agent.Suitable for summer hot humid is rainy and highway, the city of winter severe cold area
It is used in city's road and other asphalt highways.
The advantages of this performance of asphalt mixture reinforcing agent is：
(1) high temperature resistant, rutting resistance is strong, is adapted to hot area and cold district：Experiments have shown that mixing mixed with this pitch
Asphalt has very excellent high-temperature behavior obtained from closing material performance enhancers, can significantly improve the Rut resistance on road surface
Ability, specially dynamic stability can reach 6000 times/mm or more, much larger than the 2800 times/mm that national regulation requires, and not
2300 times/mm of the asphalt containing reinforcing agent.
(2) water resistant damage capability is strong, is adapted to area of heavy rainfull：This performance of asphalt mixture reinforcing agent nitrogen content is high, more general
Logical pitch is higher by several times to tens times and differs, and nitrogen exists in the form of functional group, the adhesiveness especially gathered materials and anti-stripping
From property be improved significantly, water resistant damage capability is more stable and durable.The viscous of asphalt and aggregate is improved compared to organic amine substance
Attached property, organic amine antistrip performance under the conditions of high temperature long-time can reduce rapidly.It is added to the pitch mixing of this reinforcing agent
Material, immersion Marshall residual stability is up to 96% or more, and for freeze-thaw split intensity ratio up to 88%, national regulation requires immersion
Marshall residual stability is 85%, and freeze-thaw split intensity ratio is 80%.
(3) crack resistance at low-temperature is strong, can be used for cold district：It can make to be doped with-the 10 of the asphalt of reinforcing agent
DEG C girder bending failure strain is improved to 3026.37 μ ε, and -10 DEG C of girder bending failures much larger than matrix pitch compound strain
2305.39 μ ε, -10 DEG C of girder bending failures strain for meeting the winter severe cold area required in national regulation are not less than 3000 μ ε.
(4) ageing resistance is strong, has good weatherability：Due to the rock asphalt in this performance of asphalt mixture reinforcing agent
Natural environment, it is middle there are millions upon millions of years, ingredient that is easy to aging, being easily corroded disappears already in original composition, existing
The property of ingredient is particularly stable.This performance of asphalt mixture reinforcing agent can form fine and close, bright, enrichment guarantor in Free Surface
Sheath protects matrix pitch not to be etched.The high nitrogen content of this performance of asphalt mixture reinforcing agent keeps modified pitch mixed
It is significantly improved with material viscosity, inoxidizability enhancing.These effects improve the weatherability of bituminous paving, slow down ageing of asphalt speed
Degree, to extend Road Service Life.
(5) it is not necessarily to heat transport, can stack at the construction field (site), mixture environmental protection convenient for production：This performance of asphalt mixture
Reinforcing agent is immobilising dusty material, and when storage will not lump, and be easy to store up, can stock up at the construction field (site) in advance.And this
Performance of asphalt mixture reinforcing agent has extraordinary compatibility with matrix pitch, segregation phenomenon is not present, and mixture produces
(using dry process) simple for process, mixture quality is stablized.
(6) mixing of this performance of asphalt mixture reinforcing agent and matrix pitch is excellent, and anti-aging and anti-fatigue performance is excellent
It is good；This performance of asphalt mixture reinforcing agent is produced using ripe dry process need not for a long time be heated at high temperature, mixture
It can stablize, anti-aging and anti-fatigue performance is far superior to the asphalt using wet production such as SBS mixtures and TLA.
(7) reproducible utilization, it is energy saving, meet environmentally protective development trend：
This performance of asphalt mixture reinforcing agent can save the use of matrix pitch, reduce the dependence to asphalt.And this
Special equipment is not necessarily in the production process of performance of asphalt mixture reinforcing agent, matrix pitch does not need long-time heating, can reduce
Energy consumption reduces CO2、NOx、SO2Etc. discharge capacitys.
In conclusion the comprehensive benefit of the present invention is mainly manifested in：1) temperature sensitivity for improving asphalt, increases
Stability and non-deformability in a high temperauture environment increase toughness at low ambient temperatures and cracking resistance；2) mixed to pitch
Material enhancing durability is closed, increases antifatigue cracking strength and reduction is cracked, reduce maintaining cost, prolong the service life；3)
Anti-skidding power, road improvement traffic safety are enhanced to asphalt；4) water resistance is enhanced to asphalt, improves water resistant damage
Evil ability；5) enhance asphalt normal use ability under the conditions of adverse circumstances and heavy traffic；6) mixed to pitch
It closes material and reduces the dosage of matrix pitch, and have extensive adaptability to matrix pitch, while the use of pitch can be effectively improved
Performance；7) asphalt can be used in mixed way with other various performance enhancers and outer-penetrating agent, adapts to any hardness and viscosity
Matrix pitch, different mixture proportions need only be adjusted, you can reach modified purpose；8) mixed using this pitch to asphalt
The increased overall cost of material performance enhancers institute is closed less than polymer modified asphalt mixture, other modified pitch (such as SBS, TLA
Deng) similar product of mixture and external import.
Operation strategies：1) high-grade highway or the big urban road of vehicle flowrate；2) city road crossing and traffic refer to
Show the vehicles such as lamp, stop line jogging region and slope, bridge floor；3) Bus lane, taxiway, vehicle yard and container
Stack goods yard；4) runway and airport hardstand；5) cement pavement overlays anti-skidding wearing course of asphalt etc..
Specific implementation mode
Embodiment 1
Performance of asphalt mixture reinforcing agent 1：By 91wt% rock asphalt, 8wt% linear low density polyethylene and 1wt% richness horses
Acid anhydrides forms.Wherein, in rock asphalt, asphalt quality accounts for the 15% of rock asphalt gross mass, and softening point is 85 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 15% is broken into particle, particle
Grain size is 3.53mm；Then be dried to biodiversity accounts for gross mass 1.28%, then with linear low density polyethylene that grain size is 4mm
Alkene and fumaric acid anhydride particle are rock asphalt according to mass ratio:Linear low density polyethylene:Fumaric acid anhydride=91：8：1 mixing is mixed thoroughly,
Obtain performance of asphalt mixture reinforcing agent.
Embodiment 2
Contrast test：
Performance of asphalt mixture reinforcing agent 0：It is made of 80wt% rock asphalt, 20wt% linear low density polyethylene.Wherein,
In rock asphalt, asphalt quality accounts for the 25% of rock asphalt gross mass, and softening point is 85 DEG C.
Performance of asphalt mixture reinforcing agent 2：
It is made of 91wt% rock asphalt, 8wt% linear low density polyethylene and the non-linear low density polyethylene (LDPE)s of 1wt%.Its
In, in rock asphalt, asphalt quality accounts for the 25% of rock asphalt gross mass, and softening point is 75 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 25% is broken into particle, particle
Grain size is 2.82mm, is then dried to biodiversity accounts for gross mass 1.25%, then with linear low density polyethylene that grain size is 5mm
Alkene and non-linear low density polyethylene (LDPE) particle press 91：8：1 mass ratio mixing is mixed thoroughly to be enhanced to get to performance of asphalt mixture
Agent 2.
Laboratory test is carried out using dry process, in the mixer that the target level of preheating is matched to addition experiment of gathering materials, is mixed
Enter the performance of asphalt mixture reinforcing agent in the implementation case, adds matrix pitch mix, prepares test specimen.Test temperature is 60
Degree Celsius.High temperature and low temperature dynamic stability test relevant parameter difference are as shown in Table 1 and Table 2：
The high temperature dynamic stability test result (test temperature of 1 performance of asphalt mixture reinforcing agent 2 of table：60℃)
Crack resistance at low-temperature is tested：
Specific detection method is as follows：
According to《Highway engineering pitch and Asphalt Mixture Experiment regulation》(JTJ 052-2000) Asphalt Mixture is bent
The regulation of test method is prepared the prism girder test specimen of 250mm × 30mm × 35mm by 4.70% bitumen aggregate ratio, measures it
- 10 DEG C, loading speed be 50mm/min under the conditions of destruction when strain, the test result such as table 2 of reinforcing agent 2 of the invention
Shown, the test result of the reinforcing agent 0 in contrast test is as shown in table 3：
Table 2 adds the mixture low-temperature bending strain-gauge test result (test temperature of reinforcing agent 2：-10℃)
Remarks：
(1) sample dimensions：(30×35×250)mm；
(2) test method：T0715-1993；
(3) test temperature：-10℃；Loading speed：50mm/min.
Table 3 adds the mixture low-temperature bending strain-gauge test result (test temperature of reinforcing agent 0：-10℃)
Remarks：
(1) sample dimensions：(30×35×250)mm；
(2) test method：T0715-1993；
(3) test temperature：-10℃；Loading speed：50mm/min.
It is compared from table 2 and table 3：The mixture for having added pitch blended stock reinforcing agent 2 also has excellent low temperature anti-
Fragility energy strains 2302.39 μ of failure strain that 3027.07 μ ε are much larger than matrix pitch blended stock in -10 DEG C of girder bending failures
ε, the 2751.86 μ ε of failure strain of the pitch blended stock reinforcing agent 0 also greater than in contrast test.With meeting in technical specification severe cold
Area is not less than the requirement of 2800 μ ε.
Embodiment 3
Performance of asphalt mixture reinforcing agent 3：By 91wt% rock asphalt, 8wt% ground carbon fibers and 1wt% maleic anhydride groups
At.Wherein, in rock asphalt, asphalt quality accounts for the 30% of rock asphalt gross mass, and softening point is 75 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 30% is broken into particle, particle
Grain size is 0.93mm, is then dried to biodiversity accounts for gross mass 1.74%, then with carbon fiber and maleic acid that grain size is 2mm
Acid anhydride particle presses 91：8：1 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Embodiment 4
Performance of asphalt mixture reinforcing agent 4：It is made of 91wt% rock asphalt and 9% linear low density polyethylene.Wherein, rock
In pitch, asphalt quality accounts for the 35% of rock asphalt gross mass, and softening point is 80 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 35% is broken into particle, particle
Grain size is 4.93mm, is then dried to biodiversity accounts for gross mass 0.95%, then poly- for the linea low density of 2.8mm with grain size
Ethylene particle presses 91：9 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Embodiment 5
Performance of asphalt mixture reinforcing agent 5：It is made of 91wt% rock asphalt and 9wt% neoprenes.Wherein, rock asphalt
In, asphalt quality accounts for the 18% of rock asphalt gross mass, and softening point is 85 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 18% is broken into particle, particle
Grain size is 1.78mm, is then dried to biodiversity accounts for gross mass 1.16%, then with neoprene that grain size is 1.03mm
Grain presses 91：9 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Embodiment 6
Performance of asphalt mixture reinforcing agent 6：By 93wt% rock asphalt, 5wt% low density polyethylene (LDPE)s and 2wt% butadiene-styrene rubber
Composition.Wherein, in rock asphalt, asphalt quality accounts for the 40% of rock asphalt gross mass, and softening point is 75 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 40% is broken into particle, particle
Grain size is 0.95mm, is then dried to biodiversity accounts for gross mass 1.44%, then with low density polyethylene that grain size is 0.58mm
Alkene and butadiene-styrene rubber particle press 93：5：2 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Laboratory test is carried out using dry process, in the mixer that the target level of preheating is matched to addition experiment of gathering materials, is mixed
Enter the performance of asphalt mixture reinforcing agent in the implementation case, volume is the 3% of mixture quality, mix 15 to 30 seconds, then is added
Enter matrix pitch mix, prepare test specimen.To be not added with the test specimen of reinforcing agent and be added to reinforcing agent asphalt it is dynamic steady
The indexs such as fixed degree, immersion Marshall residual stability, freeze-thaw split intensity, -10 DEG C of girder bending failure strains are detected dynamic
Stability uses national sector standard T0719-2000 test methods, 60 DEG C of test temperature, tire pressure 0.7Mpa；Immersion horse has a rest
Your residual stability uses national sector standard T0709-2000 test methods, freeze-thaw split intensity to use national sector standard
T0729-2000 test methods, -10 DEG C of girder bending failure strains use national sector standard T0715-1993 test methods, examination
Test -10 DEG C of temperature, loading speed 50mm/min.Obtain result shown in table 4：
4 performance of asphalt mixture reinforcing agent of table, 6 performance test results
Embodiment 7
Performance of asphalt mixture reinforcing agent 7：It is wooden by 91wt% rock asphalt, 5wt% linear low density polyethylene and 4wt%
Cellulose forms.Wherein, in rock asphalt, asphalt quality accounts for the 22% of rock asphalt gross mass, and softening point is 55 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 22% is broken into particle, particle
Grain size is 1.03mm, is then dried to biodiversity accounts for gross mass 1.64%, then with linear low density polyethylene that grain size is 5mm
Alkene and lignocellulosic particles press 91：5：4 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Embodiment 8
Performance of asphalt mixture reinforcing agent 8：It is made of 95wt% rock asphalt and 5wt% polyvinyl butyrals.Wherein, rock
In pitch, asphalt quality accounts for the 25% of rock asphalt gross mass, and softening point is 80 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 25% is broken into particle, particle
Grain size is 1.18mm, is then dried to biodiversity accounts for gross mass 1.03%, then with polyvinyl alcohol contracting fourth that grain size is 2.4mm
Aldehyde particle presses 95：5 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Laboratory test is carried out using dry process, in the mixer that the target level of preheating is matched to addition experiment of gathering materials, is mixed
Enter the performance of asphalt mixture reinforcing agent in the implementation case, volume is the 1.5% of mixture quality.60 DEG C of vehicles are carried out to test specimen
Rut is tested, the Marshall stability test after leaching 60 DEG C of water 30min and 48h, freeze-thaw split test for tensile strength, as a result such as table
Shown in 5：
5 performance of asphalt mixture reinforcing agent of table, 8 performance test results
Embodiment 9
Performance of asphalt mixture reinforcing agent 9：It is made of 98wt% rock asphalt and 2wt% polyvinyl butyrals.Wherein, rock
In pitch, asphalt quality accounts for the 25% of rock asphalt gross mass, and softening point is 75 DEG C.
Specific preparation process is as follows：The rock asphalt that asphalt quality is accounted for rock asphalt gross mass 25% is broken into particle, particle
Grain size is 0.88mm, is then dried to biodiversity accounts for gross mass 2%, then contract for the outer-penetrating agent polyvinyl alcohol of 3mm with grain size
Butyraldehyde particle presses 98：2 mass ratio mixing is mixed thoroughly to get to performance of asphalt mixture reinforcing agent.
Embodiment 10
The mixture for having added pitch blended stock performance enhancers provided by the invention has excellent crack resistance at low-temperature.
The mixture for adding pitch blended stock performance enhancers provided by the invention, in -10 DEG C of girder bending failure strains 2931.63
μ ε are more than the 2321.90 μ ε of failure strain of matrix pitch blended stock, meet severe cold area in technical specification and are not less than 2800 μ ε's
It is required that.
In order to examine the crack resistance at low-temperature of the performance of asphalt mixture reinforcing agent in embodiment 4, according to《Highway engineering drips
Green and Asphalt Mixture Experiment regulation》The regulation of (JTJ 052-2000) Asphalt Mixture bend test method, by 3.80%
Bitumen aggregate ratio prepare the prism girder test specimen of 250mm × 30mm × 35mm, measure it at -10 DEG C, loading speed 50mm/
Bending tensile strength when destruction under the conditions of min, the results are shown in Table 6：
6 mixture low-temperature bending strain-gauge test result of table
Remarks：
(1) sample dimensions：(30×35×250)mm；
(2) test method：T0715-1993；
(3) test temperature：-10℃；Loading speed：50mm/min.
Claims (2)
1. a kind of performance of asphalt mixture reinforcing agent, it is characterised in that：It is made of rock asphalt and outer-penetrating agent, rock asphalt and outer-penetrating agent
Mass ratio be 91：9；Bitumen content in the rock asphalt is 25%, and softening point is 75 DEG C；The outer-penetrating agent is by linear low close
Spend polyethylene and non-linear low density polyethylene (LDPE) composition, and the quality of linear low density polyethylene and non-linear low density polyethylene (LDPE)
Than being 8:1.
2. a kind of preparation method of performance of asphalt mixture reinforcing agent, it is characterised in that：It is first 25% by bitumen content, softening
Rock asphalt of the point equal to 75 DEG C is broken into particle, then grain diameter 2.82mm is dried to wherein biodiversity and accounts for rock asphalt
The 1.25% of gross mass；It is again 91 in mass ratio with outer-penetrating agent particle：9 mixing are mixed thoroughly to be enhanced to get to performance of asphalt mixture
Agent；The outer-penetrating agent is made of linear low density polyethylene and non-linear low density polyethylene (LDPE), and linear low density polyethylene and
The mass ratio of non-linear low density polyethylene (LDPE) is 8:1.
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| CN101104742A (en) * | 2007-08-23 | 2008-01-16 | 交通部公路科学研究院 | Rock asphalt composite modifier and its preparation method and use |
| CN101831190A (en) * | 2010-05-20 | 2010-09-15 | 李滢 | High-viscosity asphalt modifier soluble in asphalt and production method thereof |
| CN103613940A (en) * | 2013-11-15 | 2014-03-05 | 同济大学 | Rock asphalt composite modifier as well as preparation method and application thereof |
| CN105153719A (en) * | 2015-10-23 | 2015-12-16 | 王新航 | Rare-earth modified asphalt and preparation method thereof |
| CN105176107A (en) * | 2015-08-13 | 2015-12-23 | 山西省交通科学研究院 | Modified asphalt particles and preparation method thereof |
| CN105199406A (en) * | 2015-10-10 | 2015-12-30 | 上海森锐道路工程技术有限公司 | Rock-asphalt-modified asphalt mixture and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101104742A (en) * | 2007-08-23 | 2008-01-16 | 交通部公路科学研究院 | Rock asphalt composite modifier and its preparation method and use |
| CN101831190A (en) * | 2010-05-20 | 2010-09-15 | 李滢 | High-viscosity asphalt modifier soluble in asphalt and production method thereof |
| CN103613940A (en) * | 2013-11-15 | 2014-03-05 | 同济大学 | Rock asphalt composite modifier as well as preparation method and application thereof |
| CN105176107A (en) * | 2015-08-13 | 2015-12-23 | 山西省交通科学研究院 | Modified asphalt particles and preparation method thereof |
| CN105199406A (en) * | 2015-10-10 | 2015-12-30 | 上海森锐道路工程技术有限公司 | Rock-asphalt-modified asphalt mixture and preparation method thereof |
| CN105153719A (en) * | 2015-10-23 | 2015-12-16 | 王新航 | Rare-earth modified asphalt and preparation method thereof |
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