CN109534724A - A kind of High Modulus Asphalt Mixture and preparation method thereof modified based on high ash content rock asphalt - Google Patents
A kind of High Modulus Asphalt Mixture and preparation method thereof modified based on high ash content rock asphalt Download PDFInfo
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- CN109534724A CN109534724A CN201811488007.7A CN201811488007A CN109534724A CN 109534724 A CN109534724 A CN 109534724A CN 201811488007 A CN201811488007 A CN 201811488007A CN 109534724 A CN109534724 A CN 109534724A
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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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to pavement construction material fields, and in particular to a kind of mixture of the high-modulus asphalt modified based on high ash content rock asphalt.By high-modulus asphalt, gathering materials is made with miberal powder；High-modulus asphalt is made of high ash content rock asphalt, low-density multichain polyolefin, matrix pitch and compatilizer；It calculates by mass percentage, high ash content rock asphalt accounts for the 30% ~ 40% of rock asphalt modified high-modulus asphalt quality, and low-density multichain polyolefin volume accounts for the 2% ~ 4% of rock asphalt modified high-modulus asphalt quality.Have the characteristics that intensity is high, anti-deformation is good, anti-rut behavior is good, fatigue behaviour is good excellent based on the modified High Modulus Asphalt Mixture of high ash content rock asphalt, and meet the requirement in China's specification for plain asphalt mixture in terms of low temperature, it realizes low cost and prepares High Modulus Asphalt Mixture and solve the target of pavement track disease.
Description
Technical field
The invention belongs to pavement construction material fields, are related to a kind of preparation method of modified asphalt mixture, and in particular to
A kind of High Modulus Asphalt Mixture and preparation method thereof modified based on high ash content rock asphalt.
Background technique
Currently, Heavy Traffic phenomenon is more universal in China's road traffic, under Heavy Traffic, easily there is early stage in bituminous pavement
It destroys, such as high temperature track, crack, pushes, embraces disease.Therefore, how asphalt mixture material resistance to deformation is effectively improved
Ability and binder and the cohesive force between gathering materials, become the key that whether can solve road surface early disease.
Bitumen is by the deposition up to 1 years, variation, in the synthesis of heat, pressure, oxidation, catalyst, bacterium etc.
The lower bitumen generated of effect.For example, nitrogen exists in the form of functional group in natural rock asphalt, there is rock asphalt
Very strong wellability and high-resistance to free oxidation base, especially obtain significantly with the adhesiveness and stripper-resistance gathered materials
Improve.The softening point of rock asphalt itself reaches 300 DEG C or more, after being added to matrix pitch, makes it have good resistant to high temperatures, anti-
Ageing properties.Content of ashes reaches 50% or more rock asphalt, not only has the general characteristic of rock asphalt, but also pitch therein
The interaction for passing through 1 years with ash content, forms relatively stable activated interface.It is used in asphalt, no
It is only capable of playing the role of also improving the performance of asphalt mastic to asphalt modification, to promote the comprehensive performance of asphalt.
Natural rock asphalt originates from Hebei province in the earliest research in China and application.The last century 90's mid-term so far,
Communications Department, Hebei Province Road Design research institute has carried out North America natural rock asphalt, the high ash content rock asphalt in Trinida and river Bei Yan drip
The research as road asphalt modifier such as green (Natural Expressway Stuff rock asphalt).2005, Ministry of Communications west
Transport development technological project management portion, portion has approved " rock asphalt development of resources and pavement performance are studied " project, by Ministry of Communications's highway
Science Institute undertakes.The units such as Int. of Highway Sciences, Ministry of Communications and Beijing Highway Administration Bureau since 2001, bracing cable 110 in Beijing
National highway Yanqing section upper layer and middle surface layer, Hebei declare big highway upper layer, Hebei stone too highway upper layer and middle face
Layer, Hebei Xing face highway upper layer and middle surface layer, Hebei protect deep blue highway upper layer and middle surface layer, Tianjin east boundary are bonded
Port road upper layer and middle surface layer, 107 national highway Baoding, Hebei section upper layer and middle surface layer, Hebei provincial highway capital build line Iron Gate Pass extremely
Too line transit railway upper layer, Xinjiang Urumqi municipal administration Henan road surface layer, enshi are breathed out by butte subsegment upper layer, Jilin Province
Town road upper layer, Hubei expressway from Shanghai to Chendu cutting optimal, Guangdong Jing Zhunan highway upper layer, Guangdong Jing Zhunan high
The roads application BUTON rock asphalts such as fast highway connecting line upper layer, Anhui HeXu expressway highway upper layer and middle surface layer.
Indonesia's BUTON rock asphalt, content of ashes are about 75%, and bitumen content is about 25%, with typical asphalt mastic shape
Formula exists, and price is lower.In order to improve the comprehensive performance of asphalt highway, using Indonesia's BUTON rock asphalt as modifying agent
It is compounded, the feasibility that upper layer mixture is applied in road surface has carried out experimental study, develops the modified AC-20 of rock asphalt
The composite modified SMA-13 mixture of asphalt, gap grading rock asphalt, and carried out the Performance Evaluation of system.This patent pair
The popularization and application of rock asphalt provide a kind of new selection, the construction and maintenance quality to bituminous pavement is improved, it may have certain
Meaning.
Wang Hengbin etc. is in order to evaluate modified effect of the BUTON rock asphalt to matrix pitch of different addition quantity, using dynamic shearing
Rheometer (AR) can be carried out experimental study to the high temperature dynamic rheologic property of processes of rock asphalt modified asphalt rubber cement, and primary evaluation index has
Phase angle, storage modulus, Rutting parameter and kinetic viscosity etc..Research finds that the high-temperature behavior of processes of rock asphalt modified asphalt rubber cement is obviously excellent
In matrix pitch；Rutting parameter and kinetic viscosity index show that processes of rock asphalt modified asphalt rubber cement has and SBS Stability of Modified Asphalt Mortar phase
When anti-rut behavior, still, temperature sensitivity be higher than SBS Stability of Modified Asphalt Mortar；Rock asphalt volume influences rubber cement performance
It is more apparent, when rock asphalt and matrix pitch mass ratio reach 1:1, the high-temperature behavior of asphalt mastic be improved significantly, can
To meet Pavement Condition requirement.
The researchs such as room million, Zhang Xiaoning repair full Gilsonite rock asphalt additive A ggregate Plus using difference, in high temperature
Under the conditions of to gather materials carry out premixing wrap with improve gather materials with pitch is cementing tremble between Adhesion Interface, then add Binzhou 70 again
Number matrix pitch mixing is trembled at pitch mixing, and studies its pavement performance.Studies have shown that adding suitable rock asphalt additive
Afterwards, the high-temperature behavior that pitch mixing is trembled significantly improves, and anti-water damage ability makes moderate progress, but cryogenic property decreases.
Zhong Ke, Cao Dongwei etc. use PG by dynamic shearing (DSR), bent beam rheology (BBR), Bu Shi rotary viscosity test
Grading evaluation system is tested for the property and analyzes to the processes of rock asphalt modified asphalt of variety classes, different addition quantity.Dynamic shearing stream
Become instrument and bending mechanical properties and provides foundation, Brookfield rotational viscometer to establish certain period creep curve and stiffness modulus
Asphalt high-temperature viscosity is measured by calculating shear rate and shear stress.Test result analysis shows: asphalt adhesive after rock asphalt is added
The PG high thermal level of ramming material improves, rut factor increases, complex modulus index (GTS) increase, the height for substantially increasing pitch
Temperature stability and reduce temperature sensitivity, and as the increase amplitude of variation of volume increases；Rock asphalt volume is controlled certain
In range, big adverse effect will not be generated to the cryogenic property of bituminous cements.High ash content rock asphalt contains 75% or so
Ash content, 25% or so bitumen pass through interaction in 1 years, form the glue for connecing stable interface between ash content and pitch
Slurry, high-temperature stability, cracking resistance and the anti-water damage property of asphalt can be improved as cementitious matter.
In terms of domestic existing research situation:
(1) asphalt material of the bitumen as a kind of self-assembling formation has maximum energy-saving and environment-friendly effect.It is previous right
Natural rock asphalt is studied, and is studied primarily directed to the angle of asphalt modification, and contains the natural of 50% or more ash content
Rock asphalt can not only improve the performance of pitch as modifying agent, can also improve the performance of bituminous cements, to promote drip
The comprehensive performance of green mixture.
(2) compared with Gilsonite rock asphalt, Indonesia's BUTON rock asphalt content of ashes is higher, and content is about 75% or so, is dripping
Cutting optimal application is more universal in green road surface, therefore is directed to Indonesia's BUTON rock asphalt characteristic, needs exploitation and is suitable for high-grade public affairs
The asphalt type of Lu Zhong, upper layer.
China is mainly mixed to improve by adding high-modulus additive for the thinking that High Modulus Asphalt Mixture is studied
The modulus of material is closed, and mainly using the PR. high-modulus additive of France as reference in terms of high-modulus additive, in market application aspect
Still based on French PR series high-modulus additive, since import high-modulus additive price is high, volume is high, causes production cost
Rise, which results in High Modulus Asphalt Mixtures not to obtain large-scale application in China.In addition high-modulus is dripped
Green mixture ununified defining standard and appraisement system, this also results in High Modulus Asphalt Mixture, and in China, there is no obtain
To large-scale application.
Summary of the invention
The present invention provides a kind of using preparing based on high ash content rock asphalt, low-density multichain polyolefin, compatilizer
Novel high-modulus asphalt, this high-modulus asphalt can effectively replace traditional high-modulus asphalt, and using the high-modulus asphalt as glue
Ramming material prepares the excellent asphalt of pavement performance.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt, by high-modulus asphalt, gathers materials and miberal powder system
At；The rock asphalt modified high-modulus pitch is by high ash content rock asphalt, low-density multichain polyolefin, matrix pitch and compatilizer system
At；It calculates by mass percentage, high ash content rock asphalt accounts for the 30%~40% of rock asphalt modified high-modulus asphalt quality, low-density
Multichain polyolefin volume accounts for the 2%~4% of rock asphalt modified high-modulus asphalt quality.
Further, matrix pitch is 70# or 90# pitch.
Further, high ash content rock asphalt is BUTON rock asphalt.
Further, the density of low-density multichain polyolefin is 0.91~0.92g/cm3, and molecular structure includes branch
Linear macromolecule, crystallinity are 55%~65%.
Further, compatilizer is MAH maleic anhydride graft compatilizer.
Further, the preparation method of rock asphalt modified high-modulus pitch is:
Matrix pitch is heated into 2h in 140 DEG C of baking ovens, while high ash content rock asphalt slowly being poured into the matrix after heating
In pitch, while low-density multichain polyolefin, compatilizer is added, is kept for 160 DEG C of temperature, shears 2~3h using high-speed shearing machine,
Shear velocity is 2500~3000r/min, and modified pitch is put into 140 DEG C of baking ovens cultivation 2h and obtains the high-modulus drip
It is green.
Further, a kind of preparation method for the High Modulus Asphalt Mixture that high ash content rock asphalt is modified, including walk as follows
It is rapid:
Step 1., which will gather materials, to be heated 4~5h at 190 DEG C~210 DEG C and obtains heat and gather materials；
Step 2. gathers materials miberal powder addition heat, and will be after 150 DEG C~170 DEG C heating at the high-modulus asphalt of flowable state
Addition step 1 heat obtains mixture in gathering materials, and bitumen aggregate ratio is 4.5%~6.5%；
The mixture that step 2 obtains is stirred within the temperature range of 170 DEG C~185 DEG C 120~180s and obtained by step 3.
High Modulus Asphalt Mixture forms within the temperature range of 165 DEG C ± 3 DEG C.
By using above-mentioned technical proposal, the present invention provides a kind of novel high-modulus asphalt and its mixtures of preparing
Method, this method has abandoned traditional method using high-modulus asphalt additive, more cheap using price, more convenient to be easy to get
High ash content rock asphalt as basic modified material, be aided with other auxiliary agents such as low-density multichain polyolefin modifiers and compatilizer
It is prepared.Design of material method combination China's Asphalt Mixture Design specification proposes that this method uses special gradation,
Also there is biggish difference with current Chinese code of practice in material volume index, but its technical indicator can still pass through the existing evaluation in China
Means are evaluated.The asphalt prepared by the high-modulus asphalt can effectively improve the resistance to permanent deformation energy of asphalt
Power, anti-shear ability, high temperature anti-rut behavior, anti-water damage property, fatigue behaviour, and cryogenic property meets " highway asphalt road
Surface construction technical specification " requirement in (JTG F40-2004) to modified asphalt mixture, the high-modulus asphalt and its mixture
It can be used in road surface, cutting optimal, realize bituminous pavement high temperature anti-rut behavior and promote the double goal of pavement durability energy,
Construction cost can be saved in life cycle management.
In conclusion the invention has the following advantages:
From the point of view of material structure feature, for special gradation the characteristics of High Modulus Asphalt Mixture provided by the invention
Range (percent of pass of Partial key sieve pore has exceeded the existing asphalt mixture gradation specification in China), low porosity (porosity
Design between 2%~4%, lower than in China's specification to the requirement of the porosity of Heavy Traffic dense bitumen mixture), high oil
Stone ratio (bitumen aggregate ratio designs between 4.5%~6.5%, higher than the bitumen aggregate ratio of traditional dense bitumen mixture).The present invention mentions
The High Modulus Asphalt Mixture of confession dynamic modulus with higher, static modulus, compression rebound modulu meet French high-modulus drip
The requirement of green mixture, while there is excellent high temperature anti-rut behavior, anti-water damage, permanent deformation resistance and antifatigue
Performance, while cryogenic property meets the related request in China's specification to modified asphalt mixture.By Gao Mo provided by the invention
Measure asphalt be applied in road, cutting optimal, can effectively solve serious, anti-fatigue performance difference of asphalt pavement rut damage etc.
Pavement disease.
Since the application layer position of this kind of High Modulus Asphalt Mixture is mainly in road surface, cutting optimal, the present invention is proposed
Grading limit based on the modified High Modulus Asphalt Mixture of high ash content rock asphalt is as shown in table 1:
The grading limit of 1 High Modulus Asphalt Mixture of table
The basic performance indices of high-modulus asphalt and its mixture are shown in Table 2, table 3 in the present invention:
The basic performance indices of 2 high-modulus asphalt of table
| Performance indicator | High-modulus asphalt |
| 25 DEG C of density, g/cm3 | 1.15~1.25 |
| Softening point, DEG C | ≥60 |
| 25 DEG C of needle penetrations, 0.1mm | 10~35 |
| 15 DEG C of ductilities, cm | ≥10 |
| Flash-point, DEG C | > 230 |
| Brittle point, DEG C | ≤-15 |
The basic performance indices of 3 High Modulus Asphalt Mixture of table
The present invention has dynamic modulus height, non-deformability, anti-vehicle by the asphalt of cementitious matter of high-modulus asphalt
The good feature of rut performance, anti-water damage, fatigue behaviour.High Modulus Asphalt Mixture according to the preferred embodiment of the present invention
Dynamic modulus at 15 DEG C, 10Hz reaches 16000MPa~19000MPa, and the standard of more French High Modulus Asphalt Mixture mentions
It is high by about 15%~30%；Wanting for above-mentioned High Modulus Asphalt Mixture is all satisfied in terms of high temperature performance anti-water damage property
It asks.
The anti-vehicle of road surface overall structure can be improved suitable for road, cutting optimal in High Modulus Asphalt Mixture in the present invention
Rut ability, prolonging service life of pavement.
Specific embodiment
Invention is further described in detail below.
The technology of preparing scheme of high-modulus asphalt is as follows:
Embodiment 1:
Gather materials for the combination of basalt, limestone, meets in China's specification to thick, fine aggregate technical requirements；Filler is
Limestone dust.Mixture is designed, the design level of High Modulus Asphalt Mixture matches such as table 4:
The design level of 4 High Modulus Asphalt Mixture of table is matched
Matrix pitch is using friendship 70# pitch again；
It is 35% that high ash content rock asphalt, which accounts for mass ratio, in high-modulus asphalt；
Low-density multichain polyolefin modifiers volume accounts for the 2.5% of high-modulus asphalt quality, and compatilizer accounts for high-modulus asphalt
The 0.4% of quality；
High-modulus asphalt quality and mineral aggregate mass ratio are 5.5:100, i.e., mixture bitumen aggregate ratio is 5.5%.
Pavement performance such as table 5 based on the modified High Modulus Asphalt Mixture of high ash content rock asphalt.
Pavement performance of the table 5 based on the modified High Modulus Asphalt Mixture of bitumen
| Experimental project | Experimental result | Execute specification |
| Marshall stability, kN | 15.58 | T0709-2011 |
| Soak residual stability, % | 92.1 | T0709-2011 |
| Freeze-thaw split retained strength ratio, % | 83.5 | T0729-2000 |
| Dynamic stability, secondary/mm | 6469 | T0719-2011 |
| 15 DEG C, 10Hz, dynamic modulus, MPa | 16284 | T0738-2011 |
| Maximum low temperature flexural-tensile strain, μ ε | 2862 | T0715-2011 |
| 15 DEG C, 0.2 stress ratio, times of fatigue are secondary | 64929 | T0739-2011 |
Embodiment 2:
Gather materials for the combination of basalt, limestone, meets in China's specification to thick, fine aggregate technical requirements；Filler is
Limestone dust.Mixture is designed, the design level of High Modulus Asphalt Mixture matches such as table 6:
The design level of 6 High Modulus Asphalt Mixture of table is matched
Matrix pitch is using friendship 90# pitch again；
It is 40% that high ash content rock asphalt, which accounts for mass ratio, in high-modulus asphalt；
Low-density multichain polyolefin modifiers volume accounts for the 3.0% of high-modulus asphalt quality, and compatilizer accounts for high-modulus asphalt
The 0.5% of quality；
High-modulus asphalt quality and mineral aggregate mass ratio are 6.0:100, i.e., mixture bitumen aggregate ratio is 6.0%.
Pavement performance such as table 7 based on the modified High Modulus Asphalt Mixture of bitumen.
Pavement performance of the table 7 based on the modified High Modulus Asphalt Mixture of high ash content rock asphalt
| Experimental project | Experimental result | Execute specification |
| Marshall stability, kN | 18.42 | T0709-2011 |
| Soak residual stability, % | 91.7 | T0709-2011 |
| Freeze-thaw split retained strength ratio, % | 84.4 | T0729-2000 |
| Dynamic stability, secondary/mm | 8680 | T0719-2011 |
| 15 DEG C, 10Hz, dynamic modulus, MPa | 17844 | T0738-2011 |
| Maximum low temperature flexural-tensile strain, μ ε | 2751 | T0715-2011 |
| 15 DEG C, 0.2 stress ratio, times of fatigue are secondary | 84276 | T0739-2011 |
As can be seen from the above embodiments, it is prepared using high ash content rock asphalt, low-density multichain polyolefin as modifying agent
High-modulus asphalt binding material, and then prepare the requirement in High Modulus Asphalt Mixture satisfaction France specification to high-modulus.Preparation
High Modulus Asphalt Mixture meets code requirement in terms of cryogenic property and water stability, this is High Modulus Asphalt Mixture material
The characteristics of material composition aspect, this is the difference of High Modulus Asphalt Mixture Yu traditional dense-graded mix.Due to set
The feature that the High Modulus Asphalt Mixture gradation of meter is thin, bitumen aggregate ratio is high, voidage is low has this material excellent high temperatures
Energy, anti-fatigue performance solve bituminous pavement high temperature Rut resistance, extension pavement usage using in, cutting optimal so as to play
The purpose in service life.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (7)
1. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt, which is characterized in that by the modified Gao Mo of rock asphalt
Amount pitch, gathering materials is made with miberal powder；The rock asphalt modified high-modulus pitch is by high ash content rock asphalt, low-density multichain polyene
Hydrocarbon, matrix pitch and compatilizer are made；It calculates by mass percentage, high ash content rock asphalt accounts for rock asphalt modified high-modulus asphalitine
The 30% ~ 40% of amount, low-density multichain polyolefin volume accounts for the 2% ~ 4% of rock asphalt modified high-modulus asphalt quality.
2. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt according to claim 1, feature exist
In the matrix pitch is 70# or 90# pitch.
3. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt according to claim 1, feature exist
In the high ash content rock asphalt is BUTON rock asphalt.
4. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt according to claim 1, feature exist
In the density of the low-density multichain polyolefin is 0.91 ~ 0.92g/cm3, molecular structure is the linear macromolecule comprising branch,
Crystallinity is 55% ~ 65%.
5. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt according to claim 1, feature exist
In the compatilizer is MAH maleic anhydride graft compatilizer.
6. a kind of High Modulus Asphalt Mixture modified based on high ash content rock asphalt according to claim 1, feature exist
In the preparation method of the rock asphalt modified high-modulus pitch is:
Matrix pitch is heated into 2h in 140 DEG C of baking ovens, high ash content rock asphalt is poured into the matrix pitch after heating, is added simultaneously
Enter low-density multichain polyolefin, compatilizer, kept for 160 DEG C of temperature, shears 2 ~ 3h using high-speed shearing machine, shear velocity is 2500
Modified pitch is put into 140 DEG C of baking ovens cultivation 2h and obtains the rock asphalt modified high-modulus pitch by ~ 3000r/min.
7. a kind of preparation method for the High Modulus Asphalt Mixture that high ash content rock asphalt is modified, includes the following steps:
Step 1., which will gather materials, to be heated 4~5h at 190 DEG C ~ 210 DEG C and obtains heat and gather materials；
Step 2. gathers materials miberal powder addition heat, and will be added after 150 DEG C ~ 170 DEG C heating at the high-modulus asphalt of flowable state
Step 1 heat obtains mixture in gathering materials, and bitumen aggregate ratio is 4.5% ~ 6.5%；
The mixture that step 2 obtains is stirred within the temperature range of 170 DEG C ~ 185 DEG C 120 ~ 180s and obtains the height by step 3.
Modulus asphalt mixture forms within the temperature range of 165 DEG C ± 3 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110982433A (en) * | 2019-12-25 | 2020-04-10 | 江苏中路工程技术研究院有限公司 | Composite modified interface agent for treatment of splicing interface and preparation method thereof |
| CN112574581A (en) * | 2019-09-30 | 2021-03-30 | 西安众力沥青有限公司 | High-modulus asphalt binder for cold regions, mixture and preparation method of mixture |
| CN112608610A (en) * | 2020-12-17 | 2021-04-06 | 江苏长路交通工程有限公司 | Special additive for low-temperature-resistant high-modulus asphalt mixture and preparation method thereof |
| CN113150566A (en) * | 2020-12-07 | 2021-07-23 | 南京兴佑交通科技有限公司 | High-melt-index high-modulus asphalt mixture additive and preparation method and application thereof |
| CN113772998A (en) * | 2021-08-25 | 2021-12-10 | 新疆路桥建设集团有限公司 | High-modulus asphalt mixture and preparation method and application thereof |
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| CN112574581A (en) * | 2019-09-30 | 2021-03-30 | 西安众力沥青有限公司 | High-modulus asphalt binder for cold regions, mixture and preparation method of mixture |
| CN112574581B (en) * | 2019-09-30 | 2023-08-22 | 西安众力沥青有限公司 | High-modulus asphalt binder for cold regions, high-modulus asphalt mixture for cold regions and preparation method of high-modulus asphalt binder |
| CN110982433A (en) * | 2019-12-25 | 2020-04-10 | 江苏中路工程技术研究院有限公司 | Composite modified interface agent for treatment of splicing interface and preparation method thereof |
| CN113150566A (en) * | 2020-12-07 | 2021-07-23 | 南京兴佑交通科技有限公司 | High-melt-index high-modulus asphalt mixture additive and preparation method and application thereof |
| CN113150566B (en) * | 2020-12-07 | 2022-04-12 | 南京兴佑交通科技有限公司 | High-melt-index high-modulus asphalt mixture additive and preparation method and application thereof |
| CN112608610A (en) * | 2020-12-17 | 2021-04-06 | 江苏长路交通工程有限公司 | Special additive for low-temperature-resistant high-modulus asphalt mixture and preparation method thereof |
| WO2022126739A1 (en) * | 2020-12-17 | 2022-06-23 | 江苏中路工程技术研究院有限公司 | Low-temperature-resistant additive specially for high-modulus asphalt mixture and preparation method therefor |
| CN113772998A (en) * | 2021-08-25 | 2021-12-10 | 新疆路桥建设集团有限公司 | High-modulus asphalt mixture and preparation method and application thereof |
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Application publication date: 20190329 |