CN104292598A - Anti-rut agent and asphalt mixture containing same - Google Patents
Anti-rut agent and asphalt mixture containing same Download PDFInfo
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- CN104292598A CN104292598A CN201410462358.6A CN201410462358A CN104292598A CN 104292598 A CN104292598 A CN 104292598A CN 201410462358 A CN201410462358 A CN 201410462358A CN 104292598 A CN104292598 A CN 104292598A
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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 invention provides an asphalt mixture anti-rut agent which comprises direct coal liquefaction residues, polyolefin elastomer and additives, wherein the weight ratio of the direct coal liquefaction residues to the polyolefin elastomer is 1:(1-4); the additives account for 5-20% of the sum of the weight of the direct coal liquefaction residues and the polyolefin elastomer. The asphalt mixture anti-rut agent provided by the invention is outstanding in high-temperature resistance, good in durability and low-temperature property and can be used in the surface layer of a road so as to improve the anti-rut property of a pavement, so that the service life and repairing period of the pavement are prolonged.
Description
Technical field
The invention belongs to field of road, be specifically related to a kind of asphalt mixture additive containing coal directly-liquefied residue and polyolefin elastomer and the asphalt containing this additive.
Background technology
Along with the fast development of country, highway, especially motorway, carry increasing carrying cargo amount, and meanwhile, pavement track disease is day by day serious.The asphalt pavement maintenance of China 80% is all relevant with rut disease, and the road surface medium-capital overhauling time limit only has 6-8, and manpower and materials loss is huge.The Long Life Pavement that current research and development field is paid close attention to, its gordian technique is that road base will use high-modulus, anti-rutting asphalt material.
The PR series product that the anti-rut agent product that success uses in the world at present has France to produce, the Duroflex of Germany and LF8000 asphalt mixture additive, the SEAM Sulphur asphalt properties-correcting agent that U.S.'s shell is produced.But external product prevailing price is high, causes pavement construction cost to increase substantially, make it apply and be restricted.In recent years, domestic relevant enterprise also develops similar product, as patented technology CN1887951, CN1052740, CN1110693, CN1847318, CN1757663, CN101054469, CN1164548, CN101041744, CN100567400C etc.Domestic product main component is all the thermoplasticss such as PE, PP, or reprocessed plastic(s).Select a certain plastics as properties-correcting agent, anti-rut behavior increases, but have certain restriction in high-temperature stability.Single polyvinyl resin fusing point is low, and can form a good interfacial configuration during asphalt mixture mixing, but anti-rut behavior is not optimum.Although single acrylic resin fusing point improves, its mix difficulty, poor compatibility causes being not easy dispersion.Need broken grade for pre-treating technology as reprocessed plastic(s) use is last, add difficulty and the expense of construction.
Coal directly-liquefied residue is a kind of mixture of complicated components, not moisture, high ash content, high charcoal, high-sulfur, and thermal value is high, and agglutinating value(of coal) is strong.China Coal Research Institute (Beijing) has the Direct coal liquefaction device of 2000 tons/year, will produce the coal directly-liquefied residue of nearly 700 tons/year; There is the Direct coal liquefaction device of 1,700,000 tons/year in Inner Mongol Firing Shenhua Coal liquefaction company limited, by the coal directly-liquefied residue of generation 500,000 tons/year.These coal directly-liquefied residues also do not have application approach well.Coal directly-liquefied residue prepares anti-rut agent, not only solves the place to go of a large amount of coal directly-liquefied residue in liquefaction process, and greatly reduces the Financial cost of asphalt, have good environment and'economy benefit.Domestic patent of invention CN101844892B (coal directly-liquefied residue prepares the preparation method of bituminous concrete pavement anti-rutting agent) discloses the method that coal directly-liquefied residue prepares anti-rut agent, preparation asphalt mixture anti-rutting performance good, high-temperature stability and water stability good.Correlative study also shows, coal directly-liquefied residue can show the high-temperature behavior that strengthens asphalt and water resistant damages performance, but can make the deteriorated low temperature performance of compound.
Thermoplastic Elastomer, Olefinic (POE) is prepared by octene and ethylene copolymer, its performance characteristics as physical crosslinking point, makes the toughness of its existing excellence have again good processibility with the flexible chain coiled structure of octene and the ethylene chain of crystallization; There is no unsaturated double-bond in POE molecular structure, there is excellent ageing-resistant performance; POE narrow molecular weight distribution, has good mobility, good with polyolefine compatibility, and when preparing anti-rut agent, processing characteristics is excellent.The mobility that POE is good can improve the dispersion effect of anti-rut agent at asphalt, improves high-temperature stability and the ageing resistance of asphalt simultaneously.
Summary of the invention
For the weak point that this area exists, object of the present invention the object of the present invention is to provide a kind of anti-rut agent of low cost, preparation method and its purposes, this preparation method is simple, production process pollute little, raw material sources wide, can continuous seepage.Gained anti-rut agent can be dispersed in asphalt, directly can throw in use in compound production.
Another object of the present invention is the preparation method proposing described anti-rut agent.
3rd object of the present invention proposes the asphalt containing described anti-rut agent.
The concrete technical scheme realizing the object of the invention is:
A kind of anti-rut agent, this anti-rut agent comprises coal directly-liquefied residue, thermoplastic elastomer and additive, described coal directly-liquefied residue and the weight ratio of polyolefin elastomer are 1:1-4, described additive account for coal directly-liquefied residue and polyolefin elastomer weight and 5% ~ 20%.
Preferably, the weight ratio of coal directly-liquefied residue and polyolefin elastomer is 1:1-1.6.
Coal is after high-temperature and high-pressure hydrogenation, and wherein most of organic matter transformation is light component, discharges, and produce the heavy product accounting for raw coal quality 30% with gas or liquid form.Be called coal directly-liquefied residue.Softening temperature is generally greater than 150 DEG C.
Preferably, the preferred asphalt content of the application is 60-85%; C and H element relative content are the coal directly-liquefied residue of 70-90%.
Bituminous matter is the aromatic material of the complexity contained in pitch, and its polarity is very strong; Bituminous matter is dispersed in other components of pitch as the core of colloidal solution, and performance pitch being formed to stable colloidal dispersion and bituminous material has considerable influence.The temperature sensibility of such as pitch, high-temperature behavior etc.
Wherein, described additive is selected from pitch, oil, one or several in stearate and Masterbatch,
Wherein, described pitch is coal-tar pitch or rock asphalt; One or several in rubber oil, aromatic hydrocarbon oil, coal tar or naphthenic oil of described grease separation; Described stearate is one or several in Zinic stearas, calcium stearate, barium stearate.
The preparation method of anti-rut agent of the present invention, comprises step: coal directly-liquefied residue, polyolefin elastomer and additive are mixed in proportion, and, screw extrusion press mixing through rubber internal mixer is extruded, the granulation of air-cooled die-surface granulate equipment obtains.
Further, the melting temperature of rubber internal mixer is 80-160 DEG C, and mixing time is 3-60 minute, and the extrusion temperature of described screw extrusion press is 150-230 DEG C.
Adopt method of the present invention, after granulation, the size of particles of gained is less than 4mm, and melting index is greater than 6g/10min (190 DEG C, 2.16kg).
Asphalt containing anti-rut agent of the present invention.
A kind of asphalt, it comprises anti-rut agent, mineral aggregate and matrix pitch, and the weight ratio of described anti-rut agent, mineral aggregate and matrix pitch is 0.2-1.4:94-96:2.9-5.4, and described anti-rut agent is anti-rut agent of the present invention.
The preparation method of asphalt of the present invention, the method comprises: by anti-rut agent and hot mineral aggregate mix, and then by the mixture after mix and liquid matrix asphalt mixing, described anti-rut agent is anti-rut agent of the present invention.
Preferably, the temperature of described hot mineral aggregate is 140-210 DEG C, and the time of described anti-rut agent and hot mineral aggregate mix is 5-30 second, and the time of the mixture after described mix and liquid matrix asphalt mixing is 20-90 second.
Beneficial effect of the present invention is:
(1) anti-rut agent provided by the invention, by the Strong shear effect of the mixture containing coal directly-liquefied residue, polyolefin elastomer and additive in mixing and extrusion, the particle diameter of the particle of original coal directly-liquefied residue and polyolefin elastomer is reduced, short texture, under Additive, coal directly-liquefied residue and polyolefin elastomer reach similar compatibility.Therefore, when using anti-rut agent of the present invention to mix and stir compound, the time reaching desirable modified effect obviously being reduced, dry process production and application can be adopted.
(2) density of anti-rut agent of the present invention can be close with matrix pitch, by this anti-rut agent and matrix pitch used in combination time can reduce segregation, improve the stability of asphalt, especially this anti-rut agent employs the thermoplastic elastomer of excellent performance, and the Marshall performance of the asphalt of preparation, water stabilizing, the properties such as high temperature stability performance and cold cracking property are all fine.
(3) in the preparation method of anti-rut agent of the present invention, the generative process smoke pollution of anti-rut agent is little, can rapid dispersion when carrying out dry process mixing asphalt, compared with wet processing, and energy-conserving and environment-protective more.
(4) when using anti-rut agent mixing asphalt of the present invention, suitable to the modified effect of matrix pitch and wet processing, but technique is simple, equipment funds drop into low, can continuous seepage, convenient transportation, stable storing, easily promote the use of.There is good economic benefit social benefit.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
The raw material used in embodiment
Coal directly-liquefied residue (DCLR) (Firing Shenhua Coal liquefaction company limited), softening temperature is 190 DEG C.Wherein asphalt content ratio is 80.2%, C and the actual measurement of H element relative content is 80%.
POE (ethylene-octene copolymer elastomerics, Dupont, 7467)
Rubber oil (middle extra large pitch Binzhou company limited)
Zinic stearas, barium stearate (Beijing Le Tai Chemical Co., Ltd.)
Masterbatch (Beijing Le Tai Chemical Co., Ltd.)
Coal-tar pitch (Hebei Xu Yang Coal Chemical Industry company)
Coal tar (Hebei Xu Yang Coal Chemical Industry company)
Rock asphalt (BUTON rock asphalt)
Pitch: middle extra large 70# petroleum pitch;
Bitumen aggregate ratio: 4.3%;
Mineral aggregate, selects AC20 type, and its mineral aggregate gradation is 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, rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.) at 90 DEG C mixing 10 minutes, then twin screw extruder (Chuan Jia Machinery Co., Ltd. of Zhangjagang City is used, SJ series) extrude at 120 DEG C, then through air-cooled die-surface granulate equipment (Nanjing Guang Da rubber and plastics machine factory) granulation, obtain anti-rut agent.
After granulation, the size of particles of gained is all less than 4mm, and melting index is 2.5g/10min (190 DEG C, 2.16kg).
Embodiment 2:
By POE 3200g, coal directly-liquefied residue 2000g, rubber oil 480g, Zinic stearas 480g, BUTON rock asphalt 480g, Masterbatch 60g, rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.) at 90 DEG C mixing 10 minutes, use single screw extrusion machine (Chuan Jia Machinery Co., Ltd. of Zhangjagang City, SJ series) to extrude at 120 DEG C, then through air-cooled die-surface granulate equipment (Nanjing Guang Da rubber and plastics machine factory) granulation, anti-rut agent BH-2 is obtained.
After granulation, the size of particles of gained is all less than 4mm, and melting index is 8.0g/10min (190 DEG C, 2.16kg).
Embodiment 3:
By POE 2000g, coal directly-liquefied residue 2000g, rubber oil 480g, Zinic stearas 480g, coal-tar pitch 480g, rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.) at 90 DEG C mixing 10 minutes, use single screw extrusion machine (Chuan Jia Machinery Co., Ltd. of Zhangjagang City, SJ series) extrude at 120 DEG C, then through air-cooled die-surface granulate equipment (Nanjing Guang Da rubber and plastics machine factory) granulation, obtain anti-rut agent BH-3.
After granulation, the size of particles of gained is all less than 4mm, and melting 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, rock asphalt 480g, rubber internal mixer (Nanjing Kaichi Machinery Co., Ltd.) at 90 DEG C mixing 10 minutes, use single screw extrusion machine (Chuan Jia Machinery Co., Ltd. of Zhangjagang City, SJ series) extrude at 120 DEG C, then through air-cooled die-surface granulate equipment (Nanjing Guang Da rubber and plastics machine factory) granulation, obtain anti-rut agent BH-3.
After granulation, the size of particles of gained is all less than 4mm, and melting index is 7.3g/10min (190 DEG C, 2.16kg).
The melting index of the anti-rut agent that test above-described embodiment obtains.And above-mentioned additive to be inserted in asphalt and (anti-rut agent 37.7g is put into and accommodates dry method in 160 DEG C of hot mineral aggregate 5100g and mix and stir 10 seconds, sprayed in middle extra large 70# matrix pitch 212.3g by bitumenpump again and mix and stir 40 seconds) observe dispersing uniformity, the results are shown in Table 2.
Table 2 melting index and dispersed result
| Numbering | Melting index | Dispersed |
| ? | (190℃/2.16kg) | (180℃) |
| Embodiment 1 | 2.5 | Generally |
| Embodiment 2 | 8.0 | Good |
| Embodiment 3 | 6.5 | Good |
| Embodiment 4 | 7.3 | Good |
As can be seen from Table 2, the asphalt being added with embodiment 2,3 and embodiment 4 additive reaches basic demand, its favorable dispersity.
Embodiment 5: prepare asphalt
The anti-rut agent (37.7g) embodiment 2 obtained is put into dry method in the amalgamator accommodating 160 DEG C of hot mineral aggregates (5100g) and is mixed and stirred 10 seconds, spray into middle extra large 70# matrix pitch (212.3g) by bitumenpump again and mix and stir 40 seconds, obtain asphalt.
Embodiment 6: prepare asphalt
The anti-rut agent (50.5g) embodiment 3 obtained is put into dry method in the amalgamator of the hot mineral aggregate (5100g) accommodating 150 DEG C and is mixed and stirred 30 seconds, spray into middle extra large 70# matrix pitch (230g) by bitumenpump again and mix and stir 20 seconds, obtain asphalt.
Embodiment 7: prepare asphalt
The anti-rut agent (50.5g) embodiment 4 obtained is put into dry method in the amalgamator of the hot mineral aggregate (5100g) accommodating 150 DEG C and is mixed and stirred 30 seconds, spray into middle extra large 70# matrix pitch (230g) by bitumenpump again and mix and stir 20 seconds, obtain asphalt.
Performance test
According to the testing method in traffic industry standard " highway engineering pitch and Asphalt Mixture Experiment code (JTGE20-2011) ", respectively the performance test such as high/low temperature and water stability is carried out to the asphalt prepared in 70# matrix petroleum pitch compound and above-described embodiment.
Test result is in table 3.
Table 3 performance of asphalt mixture the result
From above-mentioned data, embodiment 2,3,4 anti-rut agent product processed damages in Rut resistance, water resistant, better performances in anti-low-temperature cracking and the pavement performance such as anti-aging, can dramatically the work-ing life extending Heavy Traffic, areas of high temperature and rainfall bituminous pavement, this product has powerful rutting resistance.And through measuring and calculating, this project additive is cheap, has great superiority of effectiveness.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.For a person skilled in the art; from some distortion that this patent disclosure and general knowledge directly derive or associate, or prior art is alternative, and the equivalence of feature changes or modifies; function and the effect of this patent description can be realized, all belong to this patent protection domain.
Claims (9)
1. an anti-rut agent, it is characterized in that, this anti-rut agent comprises coal directly-liquefied residue, polyolefin elastomer and additive, described coal directly-liquefied residue and the weight ratio of polyolefin elastomer are 1-4:1, described additive account for coal directly-liquefied residue and polyolefin elastomer weight and 5% ~ 20%.
2. anti-rut agent according to claim 1, is characterized in that: described coal directly-liquefied residue studies on asphaltene content is 60-85%; C and H element relative content are 70-90%.
3. anti-rut agent according to claim 1, is characterized in that: described additive is selected from pitch, oil, one or several in stearate and Masterbatch,
Wherein, described pitch is one or several in petroleum pitch, coal-tar pitch, rock asphalt; One or several in rubber oil, aromatic hydrocarbon oil, coal tar or naphthenic oil of described grease separation; Described stearate is one or several in Zinic stearas, calcium stearate, barium stearate.
4. the preparation method of the arbitrary described anti-rut agent of claim 1-3, it is characterized in that, comprise step: coal directly-liquefied residue, polyolefin elastomer and additive are mixed in proportion, screw extrusion press mixing through rubber internal mixer extruded, the granulation of air-cooled die-surface granulate equipment obtain.
5. preparation method according to claim 4, is characterized in that, the melting temperature of described rubber internal mixer is 80-160 DEG C, and mixing time is 3-60 minute, and the extrusion temperature of described screw extrusion press is 150-230 DEG C.
6. the asphalt containing the arbitrary described anti-rut agent of claim 1-3.
7. an asphalt, it comprises anti-rut agent, mineral aggregate and matrix pitch, and the weight ratio of described anti-rut agent, mineral aggregate and matrix pitch is 0.2-1.4:94-96:2.9-5.4, and described anti-rut agent is arbitrary described anti-rut agent in claim 1-3.
8. the preparation method of asphalt described in claim 6 or 7, it is characterized in that, the method comprises: by anti-rut agent and hot mineral aggregate mix, and then by the mixture after mix and liquid matrix asphalt mixing, and described anti-rut agent is arbitrary described anti-rut agent in claim 1-3.
9. the preparation method of asphalt according to claim 8, it is characterized in that, the temperature of described hot mineral aggregate is 140-210 DEG C, and the time of described anti-rut agent and hot mineral aggregate mix is 5-30 second, and the time of the mixture after described mix and liquid matrix asphalt mixing is 20-90 second.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104744954A (en) * | 2015-04-17 | 2015-07-01 | 神华集团有限责任公司 | Anti-rut agent, composition for preparing anti-rut agent and preparation method of anti-rut agent |
| CN105348829A (en) * | 2015-12-09 | 2016-02-24 | 焦作市新科资源综合利用研发有限公司 | Method for preparing building asphalt from coal oil residues |
| CN106147247A (en) * | 2015-03-25 | 2016-11-23 | 交通运输部公路科学研究所 | A kind of asphalt modifier and preparation thereof and application |
| CN109593370A (en) * | 2017-09-30 | 2019-04-09 | 神华集团有限责任公司 | Road asphalt modifier and modified pavement asphalt and preparation method thereof and asphalt |
| CN109593369A (en) * | 2017-09-30 | 2019-04-09 | 神华集团有限责任公司 | Road asphalt modifier and modified pavement asphalt and preparation method thereof and asphalt |
| 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 |
| CN114380530A (en) * | 2021-12-14 | 2022-04-22 | 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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