CN107056138B - A kind of modified asphalt mixture - Google Patents
A kind of modified asphalt mixture Download PDFInfo
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- CN107056138B CN107056138B CN201710049482.3A CN201710049482A CN107056138B CN 107056138 B CN107056138 B CN 107056138B CN 201710049482 A CN201710049482 A CN 201710049482A CN 107056138 B CN107056138 B CN 107056138B
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- modified asphalt
- asphalt mixture
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- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- 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
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- 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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The present invention discloses a kind of modified asphalt mixture, is related to chemical field, including matrix pitch, gathers materials and miberal powder and solid-state SBS modified asphalt mixture modifying agent；Wherein, fine and close film can be formed with miberal powder surface gathering materials after the solid-state SBS modified asphalt mixture modifying agent dissolves；Its additional amount is the 5wt%-25wt% of matrix pitch.Modified asphalt mixture anti-strip ability provided by the invention is strong, and preparation is simple, low in cost.
Description
Technical field
The present invention relates to chemical field more particularly to a kind of modified asphalt mixtures.
Background technique
SBS modified pitch is that a certain proportion of SBS modifier is added using matrix pitch as raw material, by shearing, stirring
Method is homogeneously dispersed in SBS in pitch, meanwhile, a certain proportion of exclusive stabilizer is added, forms SBS intermingling material, benefit
Modification is done to pitch with SBS good physical property.
Currently, the use of modified pitch is to solve the problems such as asphalt surface course height temperature stability drawn game portion damages from basic
Main means.But when processing SBS modified bitumen product in the prior art, generally added using wet process, i.e., first pitch is carried out
It is modified, then modified pitch is recycled to prepare modified asphalt mixture, therefore need to provide the modified drip of processing SBS in the prior art
Heat source and hot environment needed for green processing modified device and process prevent processing finished product during transportation or non-fortune
The special insulated and stirred device isolated during defeated.As it can be seen that used in existing wet processing modified asphalt mixture
SBS modified pitch is easy to happen isolation, saves requirement and higher cost, and transportation range is limited, general no more than 500km, storage
Depositing temperature cannot be below 160 DEG C.
Additionally, it is also well known that the adhesiveness of acid stone and SBS modified pitch is not strong, in order to reach preferable technology effect
Fruit should use nonacid building stones, it is seen then that existing wet process prepares asphalt there is also building stones requirement height, limits stone
The technical issues of source of material, the problem will cause building stones transport valuableness, and what non-acid local building stones can not efficiently use shows
As.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides one kind and is modified drip without wet process
The solid-state SBS modified asphalt mixture modifying agent and preparation method thereof of green mixture preparation, solid-state SBS provided by the invention are modified
Asphalt mixed material modifier, which can be directly added into mixing building, to be mixed to prepare modified pitch with matrix pitch and the miberal powder that gathers materials and mixes
Material avoids and needs processing modified device, heat source and high temperature item existing for SBS modified pitch prepared by existing wet process addition
Part, prevent processing finished product isolate special insulated and stirred device, can not long term storage the disadvantages of, moreover, the present invention offer
Modifying agent be added mixing building in can melt rapidly, stone surface formed one layer of fine and close film, make SBS modified pitch with
The nonacid surface of building stones contacts fusion, solves the acid stone technical problem poor with the adhesiveness of SBS modified pitch.
Technical purpose to realize the present invention, one aspect of the present invention provide a kind of SBS modified asphalt mixture, including matrix
Pitch gathers materials and miberal powder, further includes solid-state SBS modified asphalt modifier；
Wherein, it can be caused gathering materials to be formed with miberal powder surface after the solid-state SBS modified asphalt mixture modifying agent dissolves
Close film, for improving the anti-strip ability of modified asphalt mixture；
Wherein, the additional amount of the solid-state SBS modified asphalt mixture modifying agent is the 5-25% of matrix pitch weight.
Preferably, the additional amount of the solid-state SBS modified asphalt mixture modifying agent is the 10- of matrix pitch weight
20%.
In particular, the solid-state SBS modified asphalt mixture modifying agent can form one layer of packet with miberal powder surface gathering materials
Overlay film, to change the acid-base property of asphalt and aggregate and miberal powder contact surface.
Wherein, the matrix pitch, " the asphalt highway construction technology rule gathered materials with miberal powder according to national communication portion
Model " (JTGF40-2004) progress proportion design.
Wherein, the solid-state SBS modified asphalt modifier includes:
Modification containing high-quality pitch is expected substantially；
The first additive for being used to increase ductility and viscosity containing calcium propionate and sulphur sodium aluminate；And
The Second addition for crosslinking containing sodium lignin sulfonate and carbon black；
Wherein, the modification expects to further include caoutchouc resin and synthetic rubber substantially.
Wherein, first additive for being used to increase ductility and viscosity containing calcium propionate and sulphur sodium aluminate further include:
Sodium thiosulfate, triethanolamine, aluminium chloride, butyl stearic acid, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer.
Wherein, the Second addition further includes resin.
Wherein, the modification is expected substantially, the weight of the first additive and Second addition is:
Modified basic material 71-107；
First additive 18.5-38；
Second addition 6.5-13.5.
Wherein, the modification expect substantially in high-quality pitch, caoutchouc resin and synthetic rubber weight are as follows:
High-quality pitch 55-85；
Caoutchouc resin 8-11；
Synthetic rubber 8-11.
Wherein, the sodium thiosulfate in first additive, triethanolamine, aluminium chloride, butyl stearic acid, cellulose,
Polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer weight are:
Wherein, the weight of the sodium lignin sulfonate in the Second addition, resin and carbon black are as follows:
Sodium lignin sulfonate 3-6；
Resin 3-6；
Carbon black 0.5-1.5.
Wherein, the SBS modified asphalt mixture is prepared in accordance with the following methods:
By the matrix pitch, " standard specification for construction and acceptance of highway asphalt pavement " that gathers materials with miberal powder according to national communication portion
(JTGF40-2004) it carries out proportion design, solid-state SBS modified asphalt modifier is added and mixes, after heating mix to obtain the final product.
Wherein, heating temperature is 100-180 DEG C, preferably 100-120 DEG C, preferably 170-180 DEG C.
Wherein, a length of 30-50s, preferably 30-40s when mix.
Technical purpose to realize the present invention, further aspect of the present invention provide a kind of solid-state SBS modified asphalt mixture and change
Property agent, after dissolving can stone surface formed film, comprising:
Modification containing high-quality pitch is expected substantially；
The first additive for being used to increase ductility and viscosity containing calcium propionate and sulphur sodium aluminate；And
The Second addition for crosslinking containing sodium lignin sulfonate and carbon black.
Wherein, antistripping agent is free of in first additive and the second addition.
Especially, the modification expects to further include caoutchouc resin and synthetic rubber substantially；
Wherein, the high-quality pitch is the pitch that its asphalt content is higher than plain asphalt studies on asphaltene content.
Preferably, the asphalt content in the high-quality pitch is higher than 80% or more.
Wherein, first additive further include: sodium thiosulfate, triethanolamine, aluminium chloride, butyl stearic acid, fiber
Element, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer.
Wherein, the Second addition further includes resin.
Wherein, the modification is expected substantially, the weight of the first additive and Second addition is:
Modified basic material 71-107；
First additive 18.5-38；
Second addition 6.5-13.5.
Wherein, the modification expect substantially in high-quality pitch, caoutchouc resin and synthetic rubber weight are as follows:
High-quality pitch 55-85；
Caoutchouc latex 8-11；
Synthetic rubber 8-11.
Wherein, the sodium thiosulfate in first additive, triethanolamine, aluminium chloride, butyl stearic acid, cellulose,
Polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer weight are:
Wherein, the weight of the sodium lignin sulfonate in the Second addition, resin and carbon black are as follows:
Sodium lignin sulfonate 3-6；
Resin 3-6；
Carbon black 0.5-1.5.
Technical purpose to realize the present invention, further aspect of the present invention provide a kind of solid-state SBS modified asphalt mixture and change
The preparation method of property agent, comprising:
It will include that the modification of high-quality pitch expects substantially and is used to increase ductility and viscosity including calcium propionate and sulphur sodium aluminate
The first additive mixing, carry out first heat treatment and the first isothermal holding, obtain being sufficiently mixed uniform first mixture；
The Second addition for being used to be crosslinked including sodium lignin sulfonate and carbon black is added in the first mixture, is carried out
Second heat treatment and the second isothermal holding, obtain the second mixture；
After the drying of the second mixture, solid SBS modifier is obtained.
Wherein, the modification expects to further include caoutchouc resin and synthetic rubber substantially.
Wherein, first additive further includes sodium thiosulfate, triethanolamine, aluminium chloride, butyl stearic acid, fiber
Element, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer.
Wherein, the Second addition further includes resin.
Wherein, the temperature of first heat treatment is 175-180 DEG C, and the processing time is 30min.
Wherein, the time of first isothermal holding is 40min.
Wherein, the temperature of second heat treatment is 170-180 DEG C, and the processing time is 20-30min.
Wherein, the time of second isothermal holding is 15-30min.
Wherein, the modification is expected substantially, the weight of the first additive and Second addition is:
Modified basic material 71-107；
First additive 18.5-38；
Second addition 6.5-13.5.
Beneficial effects of the present invention:
1, the anti-strip ability of modified asphalt mixture provided by the invention is strong, at low cost, and preparation is simple.
2, SBS modifier provided by the invention is solid state product, when use direct plunge into mixing building with mixture one
Playing mix can be obtained by modified pitch or modified asphalt mixture, and maintain asphalt original processing and subsequent booth
It is constant the traditional handicrafts such as to spread, roll.
3, it is direct putting type, easy construction that the present invention, which provides SBS modifier solid state product, cost is saved, relative to existing
Modified pitch factory-modified or situ modified wet process in technology use technique, without being equipped with the modified process equipment of SBS, SBS
The costs such as modified pitch personnel, equipment occupied ground, power fuel energy consumption and process time are brought for construction work unit
Great convenience, is truly realized material and walks with project, energy conservation and environmental protection, remarkable in economical benefits.
4, solid-state SBS modifier transport storage provided by the invention is convenient, does not need special heat preservation and closes slot loading, is more not required to
The continuous insulated and stirred that segregation phenomenon occur in order to prevent during transportation and carry out can still keep SBS modified
The quality of pitch, especially, SBS modifier solid state product asphalt mixed material modifier of the invention are that several millimeters of brown is solid
Body little particle, nontoxic, stable in physicochemical property, mono- bag of papery valve bag packaging of 25Kg can satisfy various forms of transport, no
Influenced by road, can indefinite duration long-time storage, it is on-demand.Therefore solid-state SBS modifier provided by the invention solves
In the prior art using the radius of SBS modifier no more than 500km, storage is generally no more than 24 hours, and storage temperature is not
The technical issues of 160 DEG C can be lower than.
5, solid-state SBS modifier provided by the invention is extensive to the selectivity of building stones, the mixing of SBS modifier solid state pitch
Expect that modifying agent in mixing building, can melt rapidly, uniformly wrap up in and be attached on building stones, has completely cut off building stones in advance and subsequent matrix drips
Green contact, solving building stones acid-base property influences the adhesiveness of pitch.It is well known that acid stone and SBS modified pitch
Adhesiveness it is not strong, and due to building stones transport it is expensive, all can be preferentially using local building stones.So solving the acid-base property of building stones
Problem just solves the cost problem of building stones, also just further solves the problems, such as the material source of project.
6, the matrix pitch of the alternative equivalent of solid SBS modifier provided by the invention saves pitch input cost.
Specific embodiment
To better understand the objects, features and advantages of the present invention, With reference to embodiment
The present invention is further described in detail.
Many concrete details are explained in the following description to facilitate a thorough understanding of the present invention, still, the present invention is also
It can be implemented using other than the one described here other modes, therefore, the present invention is not limited to following public specific
The limitation of embodiment.
Pitch used in the present invention is 70# matrix pitch, is provided, is met by petroleum dyestuff pitch Co., Ltd in Qinhuangdao
70#, 90# or 110# road asphalt of JTG F40-2004 " Ministry of Communications's bi tumenf orr oad technical requirements " is suitable for this hair
It is bright.
Embodiment 1
1, proportion stock
Modified basic material, the first additive and Second addition are stocked up according to following weight part ratio: high-quality pitch 55；It
Right elastomer latex 11；Synthetic rubber 11；Sodium thiosulfate 3.5；Triethanolamine 5；Calcium propionate 2；Aluminium chloride 3；Butyl stearic acid
3.5；Cellulose 2；Polycyclic aromatic hydrocarbon sodium sulfonate 1.5；Acrylic copolymer 3.5；Sulphur sodium aluminate 3；Sodium lignin sulfonate 3；Resin 3；
Carbon black 1.5.
2, pre-add is heat-treated
By after weighing high-quality pitch, caoutchouc latex, synthetic rubber, sodium thiosulfate, triethanolamine, calcium propionate,
Aluminium chloride, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer, sulphur sodium aluminate, butyl stearic acid are added to pre-heating reaction
In kettle, by the heating of pre-heating reaction kettle heating 30 minutes, so that the mass temperature in reaction kettle is reached 175-180 DEG C, then protect
Temperature 40 minutes, is sufficiently mixed the substance in reaction kettle uniformly, obtains the first mixture.
3, heat
Sodium lignin sulfonate, resin, carbon black are added into the reaction kettle for fill mixture to carry out Hybrid Heating 20 minutes, makes
Mass temperature in reaction kettle is maintained at 170-180 DEG C, reacts substance therein sufficiently, continues heat preservation 15 minutes, is flowed
The second mixture of liquid of denaturation and plasticity.
4, it is granulated
Second mixture of liquid is sent into pelletizer to be granulated, water removal drying is carried out after granulation, removes water drying means
Can use any progress in the prior art, such as forced air drying, the qualified product after quality inspection, be sent into packing machine into
Row packaging, obtains granular SBS modifier.SBS modifier solid state granule technology quality obtained is as shown in table 1.
Embodiment 2
1, proportion stock
Modified basic material, the first additive and Second addition are stocked up according to following weight part ratio: high-quality pitch 85；It
Right elastomer latex 8；Synthetic rubber 8；Sodium thiosulfate 2.5；Triethanolamine 2；Calcium propionate 2；Aluminium chloride 6；Butyl stearic acid 2.5；
Cellulose 5；Polycyclic aromatic hydrocarbon sodium sulfonate 3.5；Acrylic copolymer 1.5；Sulphur sodium aluminate 1.5；Sodium lignin sulfonate 6；Resin 6；Charcoal
Black 0.5.
2, pre-add is heat-treated
By after weighing high-quality pitch, caoutchouc latex, synthetic rubber, sodium thiosulfate, triethanolamine, calcium propionate,
Aluminium chloride, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer, sulphur sodium aluminate, butyl stearic acid are added to pre-heating reaction
In kettle, by the heating of pre-heating reaction kettle heating 30 minutes, so that the mass temperature in reaction kettle is reached 175-180 DEG C, then protect
Temperature 40 minutes, is sufficiently mixed the substance in reaction kettle uniformly, obtains the first mixture.
3, heat
Sodium lignin sulfonate, resin, carbon black are added into the reaction kettle for fill mixture to carry out Hybrid Heating 30 minutes, makes
Mass temperature in reaction kettle is maintained at 170-180 DEG C, reacts substance therein sufficiently, continues heat preservation 30 minutes, is flowed
The second mixture of liquid of denaturation and plasticity.
4, it is granulated
Second mixture of liquid is sent into pelletizer to be granulated, water removal drying is carried out after granulation, removes water drying means
Can use any progress in the prior art, such as forced air drying, the qualified product after quality inspection, be sent into packing machine into
Row packaging, obtains granular SBS modifier.SBS modifier solid state granule technology quality obtained is as shown in table 1.
Embodiment 3
1, proportion stock
Modified basic material, the first additive and Second addition are stocked up according to following weight part ratio: high-quality pitch 62；It
Right elastomer latex 9；Synthetic rubber 10；Sodium thiosulfate 3；Triethanolamine 3；Calcium propionate 3；Aluminium chloride 4；Butyl stearic acid 3；Fiber
Element 3；Polycyclic aromatic hydrocarbon sodium sulfonate 1.9；Acrylic copolymer 2.2；Sulphur sodium aluminate 2.3；Sodium lignin sulfonate 4.1；Resin 5.2；Charcoal
Black 0.9.
2, pre-add is heat-treated
By after weighing high-quality pitch, caoutchouc latex, synthetic rubber, sodium thiosulfate, triethanolamine, calcium propionate,
Aluminium chloride, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer, sulphur sodium aluminate, butyl stearic acid are added to pre-heating reaction
In kettle, by the heating of pre-heating reaction kettle heating 25 minutes, so that the mass temperature in reaction kettle is reached 175-180 DEG C, then protect
Temperature 40 minutes, is sufficiently mixed the substance in reaction kettle uniformly, obtains the first mixture.
3, heat
Sodium lignin sulfonate, resin, carbon black are added into the reaction kettle for fill mixture to carry out Hybrid Heating 25 minutes, makes
Mass temperature in reaction kettle is maintained at 170-180 DEG C, reacts substance therein sufficiently, continues heat preservation 20-30 minutes, obtains
The second mixture of liquid of rheological characteristic and plasticity.
4, it is granulated
Second mixture of liquid is sent into pelletizer to be granulated, water removal drying is carried out after granulation, removes water drying means
Can use any progress in the prior art, such as forced air drying, the qualified product after quality inspection, be sent into packing machine into
Row packaging, obtains granular SBS modifier.SBS modifier solid state granule technology quality obtained is as shown in table 1:
The preparation of 4 solid state modification agent of embodiment
1, proportion stock
Modified basic material, the first additive and Second addition are stocked up according to following weight part ratio: high-quality pitch 73；It
Right elastomer latex 10.4；Synthetic rubber 9.7；Sodium thiosulfate 3.2；Triethanolamine 4.6；Calcium propionate 2.6；Aluminium chloride 4.5；Butyl
Stearic acid 3.1；Cellulose 4.6；Polycyclic aromatic hydrocarbon sodium sulfonate 2.8；Acrylic copolymer 3.1；Sulphur sodium aluminate 2.4；Lignin sulfonic acid
Sodium 5.3；Resin 5.2；Carbon black 1.2.
2, pre-add is heat-treated
By after weighing high-quality pitch, caoutchouc latex, synthetic rubber, sodium thiosulfate, triethanolamine, calcium propionate,
Aluminium chloride, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer, sulphur sodium aluminate, butyl stearic acid are added to pre-heating reaction
In kettle, by the heating of pre-heating reaction kettle heating 30 minutes, so that the mass temperature in reaction kettle is reached 175-180 DEG C, then protect
Temperature 40 minutes, is sufficiently mixed the substance in reaction kettle uniformly, obtains the first mixture.
3, heat
Sodium lignin sulfonate, resin, carbon black are added into the reaction kettle for fill mixture to carry out Hybrid Heating 22 minutes, makes
Mass temperature in reaction kettle is maintained at 170-180 DEG C, reacts substance therein sufficiently, continues heat preservation 26 minutes, is flowed
The second mixture of liquid of denaturation and plasticity.
4, it is granulated
Second mixture of liquid is sent into pelletizer to be granulated, water removal drying is carried out after granulation, removes water drying means
Any progress in the prior art, including but not limited to forced air drying can be used, the qualified product after quality inspection is sent into
Packing machine is packed, and granular SBS modifier is obtained.SBS modifier solid state granule technology quality obtained such as 1 institute of table
Show:
1 SBS modifier solid state granule technology quality of table
Wherein, appearance is measured using photoelectric detector, and granularity is measured using 6-8mm sieve method, and specific gravity uses GB/
T1033.1-2008 standard is measured, and water content is measured by difference assay, and cone penetration uses GB/T269-91 standard test, soft
Change point and uses GB/T4507-2014 standard test.
According to the measurement result of table 1 it is found that solid-state SBS modifier prepared by the present invention meets the requirements, SBS can be used as
The modifying agent of modified asphalt mixture.
The preparation of 5 asphalt of embodiment
Raw material uses gradation for AC-16 type, 70# matrix pitch, calculates pitch and mineral aggregate according to bitumen aggregate ratio for 4.6%
The dosage of (gather materials and miberal powder), mineral aggregate 100kg, heating temperature are 180 DEG C, duration of mixing 30s, and 170-180 DEG C is hit real temperature
Degree, experimental basis " JTG E20-2011 highway engineering pitch and Asphalt Mixture Experiment regulation " detection, the additive amount of modifying agent
For the materials ratio for accounting for matrix pitch 0,10wt%, 15wt%, 20wt%, 25wt% respectively, five kinds of adding proportion institute mixs
Different Asphalt Mixture testing results are as shown in table 2:
2 pavement performance measurement result of table
In table 2, LM-0 indicates that tret is 0 usage ratio, and LM-15 indicates that tret is 15 usage ratio, and LM-20 is indicated
The usage ratio that tret is 20.
According to measurement result shown in table 2 it is found that the mixture of above-mentioned five kinds of modifying agent additive amounts reaches JTGF40-
The requirement of 2004 " standard specification for construction and acceptance of highway asphalt pavement ", especially when the additive amount of modifying agent gradually increases, performance is more
It is good, moreover, when the dosage of the modifying agent of the application is that protobitumen dosage (is used according to the calculated theoretical pitch of bitumen aggregate ratio 4.6%
Amount) 10%, 70# asphalt content be protobitumen dosage 90.1wt%.The asphalt prepared with this condition is saved
The asphalt content of 9.9wt%；When the dosage of the modifying agent of the application is that protobitumen dosage is (calculated according to bitumen aggregate ratio 5.0%
Theoretical asphalt content) 15%, 70# asphalt content be protobitumen dosage 87.0wt%.The pitch prepared with this condition is mixed
Material is closed, the asphalt content of 13wt% has been saved；When the dosage of the modifying agent of the application is protobitumen dosage (according to bitumen aggregate ratio
5.0% calculated theoretical asphalt content) 20wt%, 70# asphalt content is the 83.3wt% of protobitumen dosage.In this condition
The asphalt of lower preparation, has saved the asphalt content of 16.7wt%；When the dosage of the modifying agent of the application is protobitumen use
The 25wt% of amount (according to the calculated theoretical asphalt content of bitumen aggregate ratio 5.0%), 70# asphalt content is protobitumen dosage
80wt%.The asphalt prepared with this condition has saved the asphalt content of 20wt%.
As it can be seen that the dosage of matrix pitch can be reduced using modifying agent provided by the invention, 20wt% is reached as high as.
The preparation of 5 asphalt of embodiment
It is to gather materials with the Red Sandstone (acidity) of AC13 gradation, according to the asphalt component in I-C grades of SBS modified asphalt mixtures
And its 4.7% bitumen aggregate ratio prepare asphalt, and solid-state SBS modified asphalt mixture modifying agent provided by the invention is added,
Additional amount is the 25% of matrix pitch content, the operation item of heating temperature and duration of mixing and I-C grades of SBS modified asphalt mixtures
Part is consistent, be heating temperature be 185 DEG C, duration of mixing 40s, 180 DEG C of compaction temperature, the LM-S being prepared in table 3 changes
Property, by it with I-C grades of SBS modified asphalt mixtures according to " JTG E20-2011 highway engineering pitch and Asphalt Mixture Experiment
Regulation " its pavement performance is detected, obtain measurement result as shown in table 3:
3 pavement performance measurement result of table
Measurement result as shown in table 3 is it is found that asphalt made from solid SBS modifier of the invention is added is full
The requirement of sufficient JTG F40-2004 " standard specification for construction and acceptance of highway asphalt pavement ", and properties than I-C grades SBS are modified
Height, especially dynamic stability reach 5537 times/mm.
Also, it can also be seen that solid-state SBS modified asphalt mixture modifying agent provided by the invention from the data in table 3
The acid-base property that can solve the problems, such as building stones, the preparation for being modified asphalt even with acidity aggregate not only conform to JTG
The requirement of F40-2004 " standard specification for construction and acceptance of highway asphalt pavement ", and its Pavement Performance is higher than I-C grades of SBS modified pitch and mixes
Close material.
Embodiment 6
Limestone with 70# pitch, AC-20 is the gather materials asphalt of miberal powder and the SBS modifier solid-state of the application
Change asphalt mixed material modifier and prepare modified asphalt mixture, petroleum ratio is 4.7%, and modifying agent additional amount is the weight of 70# pitch
The 15% of amount, heating temperature are 170 DEG C, duration of mixing 50s, and 175 DEG C of compaction temperature are made with mixture prepared by 70# matrix pitch
Comparison carries out Pavement Performance detection, obtains testing result as shown in table 4, wherein utilizes the modified drip of the solid-state SBS of the application
The petroleum of the asphalt of the asphalt and 70# matrix pitch preparation of green mixed material modifier preparation when operating condition
It is identical.
4 pavement performance measurement result of table
According to the measurement result of table 4 it is found that asphalt (the i.e. LM-S shown in table prepared using the method for the present invention
It is modified) each performance be above 70# matrix pitch compound, and the dynamic stability of LM-S modified asphalt mixture reaches
7537 times/mm, be 3 times of 70# matrix pitch compound.
Embodiment 7
On the south Guangdong 70# pitch, GAC-16C limestone be gather materials miberal powder asphalt and solid-state provided by the invention
SBS modified asphalt mixture modifying agent prepares asphalt, and petroleum ratio is 4.7%, and modifying agent additional amount is the weight of 70# pitch
The 15% of amount, heating temperature are 170 DEG C, duration of mixing 30s, 180 DEG C of compaction temperature, are changed with 70# matrix pitch compound and SBS
Property pitch compare, carry out Pavement Performance detection, specific testing result is as shown in table 5, wherein 70# matrix pitch compound and
SBS modified pitch prepares the operating condition of asphalt, petroleum than identical with the modifying agent provided using invention.
5 pavement performance measurement result of table
| Mix type | 70# matrix | SBS is modified | LM-S |
| It soaks Marshall residual stability (%) | 84.3 | 90.1 | 87.9 |
| Freeze-thaw split intensity ratio TSR (%) | 98 | 90.6 | 93.4 |
| Dynamic stability (secondary/mm) | 1378 | 6295 | 6812 |
According to 5 result of table it is found that providing the Asphalt Mixture Performance and 70# matrix of modifying agent preparation using the present invention
Asphalt and SBS modified pitch are suitable, and its dynamic stability is much higher than 70# matrix pitch compound.
Embodiment 8
With high richness 70# pitch, AC-13 limestone be gather materials miberal powder asphalt and solid-state SBS of the invention it is modified
Asphalt mixed material modifier prepares asphalt, and petroleum ratio is 4.6%, and modifying agent additional amount is the weight of 70# pitch
15%, heating temperature is 180 DEG C, duration of mixing 30s, and compaction temperature is 180 DEG C, and other conditions are referring to JTG F40-2004
The requirement of " standard specification for construction and acceptance of highway asphalt pavement " carries out, and compares with 70# matrix pitch compound and SBS modified pitch,
Pavement Performance detection is carried out, measures that the results are shown in Table 6, wherein 70# matrix pitch compound and SBS modified pitch and benefit
When operating condition is consistent for the petroleum of the asphalt prepared with modifying agent of the invention.
6 pavement performance measurement result of table
| Mix type | 70# matrix | SBS is modified | LM-S is modified | Code requirement |
| It soaks Marshall residual stability (%) | 96.4 | 92.6 | 97.5 | ≥85 |
| Freeze-thaw split intensity ratio TSR (%) | 83.6 | 90.8 | 92.8 | ≥75 |
| Dynamic stability (secondary/mm) | 1803 | 4194 | 4724 | ≥2400 |
| Failure strain (μ ε) | 2895 | 2509 | 2588 | ≥2500 |
Wherein, the low temperature bend test temperature for measuring failure strain is -10 DEG C, loading speed 50mm/min.
According to measurement result shown in table 6 it is found that using solid-state SBS modified asphalt mixture modifying agent provided by the invention
The asphalt of preparation and performance and 70# matrix and SBS it is modified asphalt it is identical, some performance indicators are even high
In the modified asphalt of 70# matrix and SBS.
Embodiment 9
SBS modifier solid state asphalt mixed material modifier is subjected to adhesiveness examination to granite (acidity) using water-boiling method
It tests, the specific method is as follows:
1, test prepares
Granite is gathered materials and is sieved with 13.2mm, 19mm (or round-hole mesh 15mm, 25mm), partial size 13.2-19mm (circular hole is taken
Sieve 15-25mm) rule of shape close to cube gathers materials 5, cleaned with clean water, it sets in the baking oven that temperature is (105 ± 5) DEG C
Drying, is then placed on spare in drier.And will be filled with water in large beaker, it is boiled on the asbestos gauge of juxtaposition heating furnace.
2, test procedure
It will gather materials and be fastened one by one with filament at middle part, then be placed in 1h in 105 DEG C of soil, 5 DEG C of baking ovens.Prepare matrix pitch and consolidates
State SBS modified asphalt mixture modifying agent sample.The mineral aggregate particle for taking out heating one by one is lifted with line, immerses pre-heated base
In matter pitch and solid-state SBS modified asphalt mixture modifying agent sample after 45s, gently take out, making aggregate particle is entirely pitch
It is wrapped.The aggregate particle for wrapping pitch is hung on test stand, pads a scrap of paper below, extra modifying agent is made to pour off,
And 15min is cooled down at room temperature.After aggregate particle is cooling, being lifted one by one with line, leaching people fills the large beaker center of boil water,
Heating furnace is adjusted, the water in beaker is made to keep slight boiling condition, but is not allow for the foam that boiling is opened.After digestion 3min, will gather materials from
It is taken out in water, observes the peeling degree of pitch on mineral aggregate particle, evaluate its adhesion level.
Through examining: asphalt membrane saves complete before and after aging, and stripping area is close to 0, and adhesiveness is 5 grades before and after aging.It can
See, the preparation of asphalt can be made to be no longer limited by acid-base property and its source of mineral aggregate, nothing using modifying agent of the invention
The ingredients such as antistripping agent need to be added into asphalt, and realize gathering materials on the spot for building stones, have been saved great amount of cost, have been filled
Divide and local building stones are utilized.
By the testing result of above embodiments, we can clearly have found to utilize solid-state SBS modified asphalt mixture
Mixture made by modifying agent dry method (direct putting type), not only can comprehensive modified asphalt mixture, every road can be competent at
The requirement of road ability, while also higher than the pavement performance of SBS modified asphalt mixture, the modified drip of substitution of having the ability completely SBS
It is green.Moreover, being more convenient, economic benefit is higher using SBS modifier solid state asphalt mixed material modifier product, dry process.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included in protection scope of the present invention etc.
Claims (5)
1. a kind of modified asphalt mixture, including matrix pitch, gather materials and miberal powder, which is characterized in that further include solid-state SBS modified
Asphalt mixed material modifier；
Wherein, densification can be formed with miberal powder surface gathering materials after the solid-state SBS modified asphalt mixture modifying agent dissolves
Film, for improving the anti-strip ability of modified asphalt mixture；
Wherein, the additional amount of the solid-state SBS modified asphalt mixture modifying agent is the 5wt%-25wt% of matrix pitch；
Wherein, the solid-state SBS modified asphalt mixture modifying agent includes: that the modification containing high-quality pitch is expected substantially；
The first additive for being used to increase ductility and viscosity containing calcium propionate and sulphur sodium aluminate；And
The Second addition for crosslinking containing sodium lignin sulfonate and carbon black；
Wherein, antistripping agent is free of in first additive and Second addition；
Wherein, the modification expects to further include caoutchouc resin and synthetic rubber substantially；
Wherein, first additive for being used to increase ductility and viscosity containing calcium propionate and sulphur sodium aluminate further include: thio
Sodium sulphate, triethanolamine, aluminium chloride, butyl stearic acid, cellulose, polycyclic aromatic hydrocarbon sodium sulfonate, acrylic copolymer；
Wherein, the Second addition further includes resin.
2. modified asphalt mixture as described in claim 1, which is characterized in that the modification expects substantially, the first additive and
The weight of Second addition is:
Modified basic material 71-107；
First additive 18.5-38；
Second addition 6.5-13.5.
3. modified asphalt mixture as described in claim 1, which is characterized in that the modification expect substantially in high-quality pitch, day
The weight of right rubber resin and synthetic rubber are as follows:
High-quality pitch 55-85；
Caoutchouc resin 8-11；
Synthetic rubber 8-11.
4. modified asphalt mixture as described in claim 1, which is characterized in that the first weight of additive part proportion is:
Sodium thiosulfate 2.5-3.5；
Triethanolamine 2-5；
Calcium propionate 2-5；
Aluminium chloride 3-6；
Butyl stearic acid 2.5-3.5；
Cellulose 2-5；
Polycyclic aromatic hydrocarbon sodium sulfonate 1.5-3.5；
Acrylic copolymer 1.5-3.5；
Sulphur sodium aluminate 1.5-3.
5. modified asphalt mixture as claimed in claim 2, which is characterized in that the lignin sulfonic acid in the Second addition
The weight of sodium, resin and carbon black are as follows:
Sodium lignin sulfonate 3-6；
Resin 3-6；
Carbon black 0.5-1.5.
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| CN108918838A (en) * | 2018-07-10 | 2018-11-30 | 上海理工大学 | A kind of water stability test method of emulsified asphalt fine sand mixture |
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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 |
| CN105330202A (en) * | 2015-11-04 | 2016-02-17 | 同济大学 | Preparation method of modified asphalt mixture |
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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 |
| CN105330202A (en) * | 2015-11-04 | 2016-02-17 | 同济大学 | Preparation method of modified asphalt mixture |
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