CN104292598B - A kind of anti-rut agent and the asphalt containing the anti-rut agent - Google Patents
A kind of anti-rut agent and the asphalt containing the anti-rut agent Download PDFInfo
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- CN104292598B CN104292598B CN201410462358.6A CN201410462358A CN104292598B CN 104292598 B CN104292598 B CN 104292598B CN 201410462358 A CN201410462358 A CN 201410462358A CN 104292598 B CN104292598 B CN 104292598B
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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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
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/24—Macromolecular compounds
- C04B24/26—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/223—Packed additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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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
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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
- C08L2310/00—Masterbatches
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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
- C08L2555/00—Characteristics of bituminous mixtures
- C08L2555/40—Mixtures based upon bitumen or asphalt containing functional additives
- C08L2555/80—Macromolecular constituents
- C08L2555/86—Polymers containing aliphatic hydrocarbons only, e.g. polyethylene, polypropylene or ethylene-propylene-diene copolymers
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Abstract
The present invention provides a kind of Asphalt mixture anti-rut agent, and the anti-rut agent includes that the weight ratio of coal directly-liquefied residue, polyolefin elastomer and additive, described coal directly-liquefied residue and polyolefin elastomer is 1：14, described additive accounts for the 5%～20% of the weight sum of coal directly-liquefied residue and polyolefin elastomer.The High Temperature Stability of Asphalt Mixture protrusion of the present invention, durability and low temperature performance well, can use surface layer in the road to improve the rutting resistance on road surface, prolonging service life of pavement and maintenance cycle.
Description
Technical field
The invention belongs to field of road, and in particular to a kind of containing coal directly-liquefied residue and polyolefin elastomer
Asphalt mixture additive and the asphalt containing the additive.
Background technology
Along with the fast development of country, highway, especially highway carry increasing carrying cargo amount,
At the same time, pavement track disease is increasingly serious.The asphalt pavement maintenance of China 80% is all relevant with rut disease, and road surface is big
In repair the time limit and there was only 6-8, manpower and materials loss is huge.Current research and development field Long Life Pavement of interest, its key technology
It is that road base will use high-moduluss, anti-rutting asphalt material.
The anti-rut agent product for successfully using in the world at present has the PR series of products of France's production, the Duroflex of Germany
With LF8000 asphalt mixture additive, the SEAM sulphur asphalt modifying agents of U.S.'s shell production.But external product is universal
Price is high, causes pavement construction cost to increase substantially so as to which popularization and application are restricted.In recent years, domestic relevant enterprise
Also similar product, such as patented technology CN1887951 are developed, CN1052740, CN1110693, CN1847318,
CN1757663, CN101054469, CN1164548, CN101041744, CN100567400C etc..Domestic product main component
It is the thermoplastics such as PE, PP, or regenerated plastics.From a certain plastics as modifying agent, have on anti-rut behavior
Improved, but had certain restriction in high-temperature stability.Single polyvinyl resin fusing point is low, during with asphalt mixture mixing
A good interface configuration can be formed, but anti-rut behavior is not optimum.Although single acrylic resin fusing point is improved,
Its mix is difficult, and poor compatibility causes to be not easy dispersion.Regenerated plastics are increased using broken grade for pre-treating technology is front generally required
The difficulty and expense of construction.
Coal directly-liquefied residue is a kind of mixture of complicated components, not aqueous, high ash, high charcoal, high-sulfur, caloric value
Height, cohesiveness are strong.China Coal Research Institute (Beijing) has 2000 tons/year of Direct coal liquefaction device, will produce nearly 700 tons/
The coal directly-liquefied residue in year；There is 1,700,000 tons/year of Direct coal liquefaction device in coal liquifaction company limited of Inner Mongol Shenhua, will produce
500000 tons/year of coal directly-liquefied residue.These coal directly-liquefied residues are also without application approach well.DCL/Direct coal liquefaction is residual
Slag prepares anti-rut agent, not only solves the place to go of a large amount of coal directly-liquefied residues in liquefaction process, and greatly reduces drip
The Financial cost of blue or green compound, has good environment and economic benefit.Domestic patent of invention CN101844892B (DCL/Direct coal liquefaction
Residue prepares the preparation method of bituminous concrete pavement anti-rutting agent) disclose the side that coal directly-liquefied residue prepares anti-rut agent
Method, the asphalt mixture anti-rutting performance of preparation are good, and high-temperature stability and water stability are good.Correlational study also indicates that coal is direct
Liquefied residue can damage performance with the significant high-temperature behavior and water resistant for strengthening asphalt, but can make the cryogenic property of compound
It is deteriorated.
TPO (POE) is prepared by octene and ethylene copolymer, its performance characteristics with
The flexible chain coiled structure of octene and the ethylene chain of crystallization make its existing excellent toughness have good again as physical crosslinking point
Processability；No unsaturated double-bond in POE molecular structures, with excellent ageing-resistant performance；POE narrow molecular weight distributions, have
Preferable mobility, good with polyolefin compatibility, when preparing anti-rut agent, processing characteristics is excellent.POE good mobility can change
Dispersion effect of the kind anti-rut agent in asphalt, while improve the high-temperature stability and resistance to ag(e)ing of asphalt.
The content of the invention
For this area exist weak point, the purpose of the present invention it is an object of the invention to provide it is a kind of low cost
Anti-rut agent, preparation method and its purposes, the preparation method is simple, the production process little, raw material sources of pollution are wide, can be even
Continuous production.Gained anti-rut agent can be dispersed in asphalt, can use producing directly to throw in compound.
It is another object of the present invention to propose the preparation method of the anti-rut agent.
Third object of the present invention is to propose the asphalt containing the anti-rut agent.
The concrete technical scheme for realizing the object of the invention is：
A kind of anti-rut agent, the anti-rut agent include coal directly-liquefied residue, thermoplastic elastomer (TPE) and additive, described
The weight ratio of coal directly-liquefied residue and polyolefin elastomer is 1：1-4, described additive account for coal directly-liquefied residue and gather
The 5%～20% of the weight sum of olefin elastomer.
Preferably, the weight ratio of coal directly-liquefied residue and polyolefin elastomer is 1：1-1.6.
After high-temperature and high-pressure hydrogenation, wherein most organic matter transformation is light components to coal, with gas or liquid form
Discharge, and produce the heavy product for accounting for raw coal quality 30%.Referred to as coal directly-liquefied residue.Generally higher than 150 DEG C of softening point.
Preferably, the preferred asphalt content of the application is 60-85%；C and H element relative amount are straight for the coal of 70-90%
Connect liquefied residue.
Asphalitine is the aromatic material of the complexity contained in Colophonium, and its polarity is very strong；Asphalitine is used as colloid solution
Core is dispersed in the other components of Colophonium, and the performance that stable colloidal dispersion and asphalt material are formed to Colophonium has larger shadow
Ring.The response to temperature of such as Colophonium, high-temperature behavior etc..
Wherein, described additive is selected from Colophonium, oil, one or several in stearate and Masterbatch,
Wherein, described Colophonium is coal tar pitch or bitumen；Described grease separation is from rubber oil, aromatic naphtha, coal tar
Or one or several in naphthenic oil；Described stearate is zinc stearate, calcium stearate, the one kind in barium stearate
Or it is several.
The preparation method of anti-rut agent of the present invention, including step：By coal directly-liquefied residue, polyolefin elastomer and
Additive is mixed in proportion, and the mixing of Jing rubber internal mixers, screw extruder extrusion, the pelletize of air-cooled die-surface granulate equipment are obtained.
Further, the melting temperature of rubber internal mixer be 80-160 DEG C, mixing time be 3-60 minutes, the screw rod squeeze
The extrusion temperature for going out machine is 150-230 DEG C.
Using the method for the present invention, after pelletize, the particle size of gained is less than 4mm, and melt index is more than 6g/10min (190
DEG C, 2.16kg).
Asphalt containing anti-rut agent of the present invention.
A kind of asphalt, which includes anti-rut agent, mineral aggregate and matrix pitch, the anti-rut agent, mineral aggregate and substrate
The weight ratio of Colophonium is 0.2-1.4：94-96：2.9-5.4, the anti-rut agent are anti-rut agent of the present invention.
The preparation method of asphalt of the present invention, the method include：By anti-rut agent and hot mineral aggregate mix, then
Again by the mixture after mix and liquid matrix asphalt mixing, the anti-rut agent is anti-rut agent of the present invention.
Preferably, the temperature of the hot mineral aggregate is 140-210 DEG C, and the anti-rut agent is 5- with the time of hot mineral aggregate mix
30 seconds, the mixture after the mix was the 20-90 seconds with the time of liquid matrix asphalt mixing.
The beneficial effects of the present invention is：
(1) anti-rut agent that the present invention is provided, is by containing coal directly-liquefied residue, polyolefin elastomer and additive
Strong shear effect of the mixture in mixing and extrusion, makes original coal directly-liquefied residue and polyolefin elastomer
The particle diameter of particle reduces, short texture, and under Additive, coal directly-liquefied residue and polyolefin elastomer have reached similar
It is compatible.Therefore, when compound is mixed and stirred using the anti-rut agent of the present invention, the time for reaching preferable modified effect is made substantially to reduce,
Dry process production and application can be adopted.
(2) density of anti-rut agent of the invention can be close to matrix pitch, and the anti-rut agent and matrix pitch are being mixed
Close and isolation when using, can be reduced, improve the stability of asphalt, the especially anti-rut agent has used the heat of excellent performance
Thermoplastic elastic, the Marshall performance of the asphalt of preparation, water stabilizing, high temperature stability performance and cold cracking property
It is fine Deng properties.
(3), in the preparation method of anti-rut agent of the present invention, the generating process smoke pollution of anti-rut agent is little, carries out dry method work
Energy rapid dispersion during skill mixing asphalt, compared with wet processing, more energy-conserving and environment-protective.
(4) modified effect and wet method work when using the anti-rut agent mixing asphalt of the present invention, to matrix pitch
Quite, but process is simple, equipment funds input is low, continuously can produce, convenient transportation, stable storing, easily promote the use of for skill.Have
Good economic benefit social benefit.
Specific embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Raw material used in embodiment
Coal directly-liquefied residue (DCLR) (coal liquifaction company limited of Shenhua), softening point are 190 DEG C.Wherein asphalt content
Than being 80.2%, C and the actual measurement of H element relative amount is for 80%.
POE (ethylene-octene copolymer elastomer, Dupont, 7467)
Rubber oil (middle extra large Colophonium Binzhou company limited)
Zinc stearate, barium stearate (Beijing Le Tai Chemical Co., Ltd.s)
Masterbatch (Beijing Le Tai Chemical Co., Ltd.s)
Coal tar pitch (Hebei Xu Yang Coal Chemical Industries company)
Coal tar (Hebei Xu Yang Coal Chemical Industries company)
Bitumen (BUTON rock asphalt)
Colophonium：Middle extra large 70# asphalt；
Bitumen aggregate ratio：4.3%；
Mineral aggregate, from AC20 types, its mineral aggregate gradation is shown in Table 1：
Table 1：Mineral aggregate gradation
Embodiment 1：
By POE 4000g, coal directly-liquefied residue 2000g, rubber oil 480g, coal tar pitch 480g, Masterbatch 60g, in rubber
Glue banbury (Nanjing Kaichi Machinery Co., Ltd.) is kneaded 10 minutes at 90 DEG C, then using double screw extruder (Zhangjiagang
Chuan Jia Machinery Co., Ltd.s of city, SJ are serial) extrude at 120 DEG C, then (Nanjing extensively reaches rubber machine to Jing air-cooled die-surfaces granulate equipment
Tool factory) pelletize, obtain anti-rut agent.
After pelletize, the particle size of gained is respectively less than 4mm, and melt index is 2.5g/10min (190 DEG C, 2.16kg).
Embodiment 2：
By POE 3200g, coal directly-liquefied residue 2000g, rubber oil 480g, zinc stearate 480g, BUTON rock asphalt
480g, Masterbatch 60g, knead 10 minutes at 90 DEG C in rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.), using list
Screw extruder (Chuan Jia Machinery Co., Ltd.s of Zhangjagang City, SJ are serial) is extruded at 120 DEG C, and then Jing air-cooled die-surfaces pelletizing sets
Standby (Nanjing extensively reaches rubber and plastics machine factory) pelletize, obtains anti-rut agent BH-2.
After pelletize, the particle size of gained is respectively less than 4mm, and melt index is 8.0g/10min (190 DEG C, 2.16kg).
Embodiment 3：
By POE 2000g, coal directly-liquefied residue 2000g, rubber oil 480g, zinc stearate 480g, coal tar pitch 480g,
Rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.) is kneaded 10 minutes at 90 DEG C in, using single screw extrusion machine (Zhangjiagang
Chuan Jia Machinery Co., Ltd.s of city, SJ are serial) extrude at 120 DEG C, then (Nanjing extensively reaches rubber machine to Jing air-cooled die-surfaces granulate equipment
Tool factory) pelletize, obtain anti-rut agent BH-3.
After pelletize, the particle size of gained is respectively less than 4mm, and melt index is 6.5g/10min (190 DEG C, 2.16kg).
Embodiment 4：
By POE 2800g, coal directly-liquefied residue 2000g, rubber oil 480g, barium stearate 480g, bitumen 480g,
Knead 10 minutes at 90 DEG C in rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.), using a single screw extrusion machine (family
Harbor city Chuan Jia Machinery Co., Ltd.s, SJ are serial) extrude at 120 DEG C, then (Nanjing extensively reaches rubber and plastic to Jing air-cooled die-surfaces granulate equipment
Machinery plant) pelletize, obtain anti-rut agent BH-3.
After pelletize, the particle size of gained is respectively less than 4mm, and melt index is 7.3g/10min (190 DEG C, 2.16kg).
The melt index of the anti-rut agent that test above-described embodiment is obtained.And above-mentioned additive is inserted into asphalt
In (anti-rut agent 37.7g is put into dry method in accommodating 160 DEG C of hot mineral aggregate 5100g to mix and stir 10 seconds, then by bitumenpump penetrating
40 seconds are mixed and stirred in middle extra large 70# matrix pitches 212.3g) observation dispersing uniformity, the results are shown in Table 2.
2 melt index of table and dispersibility result
| Numbering | Melt index | Dispersibility |
| (190℃/2.16kg) | (180℃) | |
| Embodiment 1 | 2.5 | Typically |
| Embodiment 2 | 8.0 | It is good |
| Embodiment 3 | 6.5 | It is good |
| Embodiment 4 | 7.3 | It is good |
From table 2 it can be seen that the asphalt for being added with 4 additive of embodiment 2,3 and embodiment has reached substantially
Require, its favorable dispersibility.
Embodiment 5：Prepare asphalt
Anti-rut agent (37.7g) obtained by embodiment 2 is put into and accommodates mixing and stirring for 160 DEG C hot mineral aggregate (5100g)
In machine, dry method is mixed and stirred 10 seconds, then sea 70# matrix pitches (212.3g) is mixed and stirred 40 seconds in being sprayed into by bitumenpump, obtains Colophonium mixing
Material.
Embodiment 6：Prepare asphalt
Anti-rut agent (50.5g) obtained by embodiment 3 is put into mixing for hot mineral aggregate (5100g) that accommodate 150 DEG C
Mix and stir 30 seconds with dry method in machine, then sea 70# matrix pitches (230g) is mixed and stirred 20 seconds in being sprayed into by bitumenpump, obtain Colophonium mixing
Material.
Embodiment 7：Prepare asphalt
Anti-rut agent (50.5g) obtained by embodiment 4 is put into mixing for hot mineral aggregate (5100g) that accommodate 150 DEG C
Mix and stir 30 seconds with dry method in machine, then sea 70# matrix pitches (230g) is mixed and stirred 20 seconds in being sprayed into by bitumenpump, obtain Colophonium mixing
Material.
Performance test
According to traffic industry standard《Highway engineering Colophonium and Asphalt Mixture Experiment code (JTGE20-2011)》In survey
Method for testing, respectively the asphalt to preparing in 70# substrate asphalt compounds and above-described embodiment carry out height
The performance test such as low temperature and water stability.
Test result is shown in Table 3.
3 performance of asphalt mixture the result of table
Knowable to above-mentioned data, 2,3,4 anti-rut agent product processed of embodiment Rut resistance, water resistant damage, anti-low-temperature cracking and
Better performances in terms of the pavement performances such as aging resistance, can dramatically prolongation Heavy Traffic, the use longevity of areas of high temperature and rainfall bituminous paving
Life, this product have powerful rutting resistance.And Jing calculates, this project additive is cheap, with great cost performance
Advantage.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.It will be understood by those skilled in the art that straight from this patent disclosure and general knowledge
Some deformations derived or associate, or the replacement of prior art, and equivalence changes or the modification of feature are connect, this can be realized
The function and effect of patent description, belongs to this patent protection domain.
Claims (4)
1. a kind of asphalt, which includes anti-rut agent, mineral aggregate and matrix pitch, the drip of the anti-rut agent, mineral aggregate and substrate
Blue or green weight ratio is 0.2-1.4：94-96：2.9-5.4, the anti-rut agent by coal directly-liquefied residue, polyolefin elastomer and
Additive is constituted, and the weight ratio of described coal directly-liquefied residue and polyolefin elastomer is 1：1-1.6, described additive are accounted for
The 5%～20% of the weight sum of coal directly-liquefied residue and polyolefin elastomer.；The polyolefin elastomer is ethylene-octene
Copolymer elastomer；
Wherein, the coal directly-liquefied residue studies on asphaltene content is 60-85%；C and H element relative amount are 70-90%；Institute
The additive stated is Colophonium, oily and Masterbatch, or the combination of Colophonium, oil and Masterbatch and stearate,
Wherein, described Colophonium be asphalt, coal tar pitch, one or several in bitumen；Described grease separation is from rubber
One or several in glue oil, aromatic naphtha, coal tar；Described stearate is zinc stearate, calcium stearate, barium stearate
In one kind；
Described anti-rut agent is prepared by following steps：By coal directly-liquefied residue, polyolefin elastomer and additive
It is mixed in proportion, the mixing of Jing rubber internal mixers, screw extruder extrusion, the pelletize of air-cooled die-surface granulate equipment are obtained.
2. asphalt according to claim 1, it is characterised in that the melting temperature of the rubber internal mixer is 80-
160 DEG C, mixing time is 3-60 minutes, and the extrusion temperature of the screw extruder is 150-230 DEG C.
3. asphalt according to claim 1, it is characterised in that the asphalt is prepared by the following method：
By anti-rut agent and hot mineral aggregate mix, then again by the mixture after mix and liquid matrix asphalt mixing.
4. asphalt according to claim 1, it is characterised in that the temperature of the hot mineral aggregate is 140-210 DEG C, institute
The time for stating anti-rut agent and hot mineral aggregate mix is the 5-30 seconds, the mixture after the mix and liquid matrix asphalt mixing when
Between be the 20-90 seconds.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106147247B (en) * | 2015-03-25 | 2019-11-12 | 交通运输部公路科学研究所 | A kind of asphalt modifier and its preparation and application |
| CN104744954B (en) * | 2015-04-17 | 2018-03-02 | 神华集团有限责任公司 | Anti-rut agent, the composition and its preparation method for preparing it |
| CN105348829B (en) * | 2015-12-09 | 2017-06-20 | 焦作大学 | A kind of method that building asphalt is prepared with coal liquifaction residue |
| CN109593369B (en) * | 2017-09-30 | 2022-06-21 | 国家能源投资集团有限责任公司 | Road asphalt modifier, modified road asphalt, preparation method of modified road asphalt and asphalt mixture |
| CN109593370B (en) * | 2017-09-30 | 2022-06-21 | 国家能源投资集团有限责任公司 | Road asphalt modifier, modified road asphalt, preparation method of modified road asphalt and asphalt mixture |
| CN112852050A (en) * | 2021-01-22 | 2021-05-28 | 河南泽远新材料科技有限公司 | Anti-rutting agent, asphalt mixture and preparation method of anti-rutting agent and asphalt mixture |
| CN114380530B (en) * | 2021-12-14 | 2023-03-28 | 中路高科(北京)公路技术有限公司 | High-modulus additive for asphalt mixture, preparation method of high-modulus additive and asphalt mixture |
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| CN101775223A (en) * | 2009-12-24 | 2010-07-14 | 交通部公路科学研究所 | Additive for drainage asphalt mixture of high temperature heavy load road and preparation method thereof |
| CN101844892A (en) * | 2010-06-12 | 2010-09-29 | 长安大学 | Method for preparing bituminous concrete pavement anti-rutting agent from directly-liquefied coal residue |
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