CN108129074A - A kind of high-strength asphalt and preparation method thereof - Google Patents

A kind of high-strength asphalt and preparation method thereof Download PDF

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Publication number
CN108129074A
CN108129074A CN201810090707.4A CN201810090707A CN108129074A CN 108129074 A CN108129074 A CN 108129074A CN 201810090707 A CN201810090707 A CN 201810090707A CN 108129074 A CN108129074 A CN 108129074A
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asphalt
parts
particles
mineral aggregate
strength
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CN201810090707.4A
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CN108129074B (en
Inventor
王真
李振
柳浩�
杨丽英
孙文龙
蔡玮
关爱博
王建国
杨炎生
李宁
布海玲
周世生
叶春琳
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Beijing Municipal Administration Road And Bridge Ltd Co
Beijing Municipal Road & Bridge Building Material Group Co ltd
BEIJING ZHENGDA KUNSHUN TECHNOLOGY TESTING CO LTD
Beijing Municipal Road and Bridge Co Ltd
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Beijing Municipal Administration Road And Bridge Ltd Co
Beijing Municipal Road & Bridge Building Material Group Co ltd
BEIJING ZHENGDA KUNSHUN TECHNOLOGY TESTING CO LTD
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Priority to CN201710425979 priority
Application filed by Beijing Municipal Administration Road And Bridge Ltd Co, Beijing Municipal Road & Bridge Building Material Group Co ltd, BEIJING ZHENGDA KUNSHUN TECHNOLOGY TESTING CO LTD filed Critical Beijing Municipal Administration Road And Bridge Ltd Co
Publication of CN108129074A publication Critical patent/CN108129074A/en
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Publication of CN108129074B publication Critical patent/CN108129074B/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02Macromolecular compounds
    • C04B26/26Bituminous materials, e.g. tar, pitch
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0076Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0075Uses not provided for elsewhere in C04B2111/00 for road construction
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention belongs to the technical fields of asphalt road surface material manufacture, more particularly to a kind of high-strength asphalt and preparation method thereof, the mixture is by waste asphalt pavement material, asphalt binder, new mineral aggregate, additive forms, and weight ratio is (10-16):(4-5):(85-90):(0.25 0.5), asphalt binder is by lake asphalt:Matrix pitch=(25 35):100 compositions;Total bitumen aggregate ratio is 4 5% in high-strength asphalt, and the additive melts agent by anti-rut agent and increasing and forms.The characteristics of high-strength asphalt of the present invention utilizes waste asphalt pavement material hardening brittle, it is big to play lake asphalt hardness, the characteristics of viscosity is high, and melt agent with reference to other increasings, a kind of high-strength asphalt is prepared, available for the section of high-strength asphalt mixture, that is, has dissolved the waste asphalt pavement material that conventional regeneration technology is difficult to be utilized, the performance of asphalt is improved again, saves material cost.

Description

A kind of high-strength asphalt and preparation method thereof
Technical field
The invention belongs to the technical field of asphalt road surface material manufacture more particularly to a kind of high-strength asphalt and Preparation method.
Background technology
China's bituminous paving is perplexed for a long time by track disease, as Heavy Traffic section, urban road intersection, public transport are special With road etc., the generation of track not only seriously affects traveling comfort, also jeopardizes traffic safety.According in the world in relation to data statistic It is bright:It is rutting deformation to have more than 80% in the maintenance of bituminous paving.And the maintenance of track damage is more difficult, Usually regarding rutting depth determines maintenance program if the deeper section of track needs in milling, making again after upper layer, to repair Project cost is higher.Meanwhile compared with the pavement diseases such as cracking, Moisture Damage, the harmfulness of track is maximum, directly threatens traffic peace Entirely, it is the immediate cause of many major traffic accidents.
In recent years, the track disease of bituminous paving is not reduced, on the contrary, quantity and severity are all more serious, is also drawn The concern of people is played, the processing and repair of track disease have become a routine work of road maintenance department, some roads Section track has to half a year processing once, causes serious economic loss.
At present, it is general that track prevention is carried out, but this method cost is higher using the technological means for adding anti-rut agent, it makes The about large-scale promotion application of Rut resistance technology.
China's road has been enter into the extensive maintenance phase, and the design life of bituminous paving is generally 8 to 15 years, from It counts, the bituminous paving for having about 10% is entered into maintenance every year or rebuilds the period now.According to statistics, what China generated every year is waste and old Asphalt pavement material reaches up to ten million tons, if waste asphalt pavement material is given it up, can not only occupy a large amount of soil, together When will cause the wasting of resources and environmental pollution.
Applied of Asphalt Pavement Recycle Technique is will to be applied to road basis after the processing of original bituminous paving waste and scrap regeneration cycle In Facilities Construction and maintenance project, turn waste into wealth, form an industrial chain for meeting Mode of Circular, it can be to avoid building rubbish Pollution of the rubbish to appropriation of land and to environment, can also reduce the dependence to the common Load materials such as building stones, pitch, cement, And reduce and build the road, road maintaining cost, meet the environmental protection principle of " whose production, whose processing ", there is significant society, economic effect Benefit.The regeneration of bituminous paving salvage material reduces the pollution to environment, reduces the waste of the energy, reduce due to Largely using the ecological environment destructions such as forest cover reduction, soil erosion caused by sandstone material, there is immeasurable society Value and environment protection significance.
Applied of Asphalt Pavement Recycle Technique includes cold recycling technology and hot in-place recycling.However, cold recycled asphalt mixture performance It is poor compared with hot-mix asphalt mixture, and the problem of due to equipment and material property, close hot recycling is several with hot-mix asphalt mixture The old material that aging is serious, thinner can not be dissolved.
Waste asphalt pavement material (including old mineral aggregate, Bituminous concrete surface) waste asphalt pavement material has high recycling valency Value, if filling roadbed its simply will be caused the great wasting of resources.Waste asphalt pavement material is no longer that a kind of solid gives up Gurry becomes a kind of resource of preciousness instead.
Invention content
The purpose of the present invention is to provide a kind of high-strength asphalt and preparation method thereof, for highway and urban road Heavy Traffic section, urban road intersection, public transportation lane etc. in newly-built and medium-capital overhauling engineering, the asphalt improve Asphalt pavement rut resisting performance, reduces conventional anti-rutting asphalt mixture cost, and has dissolved conventional regeneration technology hardly possible With the waste asphalt pavement material utilized.
The present invention provides following scheme:
A kind of high-strength asphalt, the mixture is by waste asphalt pavement material, asphalt binder, new mineral aggregate, addition Agent forms, and weight ratio is (10-16):(4-5):(85-90):(0.25-0.5), asphalt binder is by lake asphalt:Matrix Pitch=(25-35):100 compositions;Total oilstone mass ratio is (Bituminous concrete surface+asphalt binder) in high-strength asphalt:It is (old Mineral aggregate+new mineral aggregate)=(4-5) %, the additive is by anti-rut agent:Agent=(4-8) is melted in increasing:(1-2) is formed, described waste and old Bituminous concrete surface and old mineral aggregate content determine method in asphalt pavement material:(1) waste asphalt pavement material co-grinding diameter< 10mm, (2) take part waste asphalt pavement material, reference《Highway engineering pitch and Asphalt Mixture Experiment regulation》T0722- 2011, the ratio of old mineral aggregate and Bituminous concrete surface in waste asphalt pavement material is determined by extraction test, (3) measure 25 DEG C of Bituminous concrete surface Needle penetration is not more than 30, unit:0.1mm, ring and ball softening point are not less than 60 DEG C.
The lake asphalt be Trinidad Lake Asphalt, the matrix pitch be AH-70 pitches, the waste asphalt pavement material In material 25 DEG C of needle penetrations of pitch be 21-23, unit:0.1mm, ring and ball softening point are 62-65 DEG C.
The increasing melts agent as tapped oil or subtracts third fractional oil, and 60 DEG C of viscosity are less than 1000cSt, flash-point>220 DEG C, thin film oven Ratio of viscosities before and after experiment<3%, mass change absolute value<3.
Preferably, total mineral aggregate in the asphalt includes new mineral aggregate and old mineral aggregate, and total mineral aggregate closes It is made of into grading gathering materials for following particle size:
4 parts~6 parts of 19~26.5mm particles;
11 parts~12 parts of 16~19mm particles;
10 parts~12 parts of 13.2~16mm particles;
14 parts~15 parts of 9.5~13.2mm particles;
20 parts of 4.75~9.5mm particles;
12 parts of 2.36~4.75mm particles;
8 parts of 1.18~2.36mm particles;
2 parts~4 parts of 0.6~1.18mm particles;
4 parts of 0.3~0.6mm particles;
4 parts of 0.15~0.3mm particles;
2 parts of 0.075~0.15mm particles;
4 parts~6 parts of 0~0.075mm particles.
A kind of preparation method of high-strength asphalt, includes the following steps:
(1) it is heated after new mineral aggregate is mixed;
(2) anti-rut agent is added in, is stirred after mixing;
(3) it adds in waste asphalt pavement material and increases and melt agent, stirred after mixing;
(4) asphalt binder after preheating is added in, is stirred after mixing.
Wherein, heating temperature is 190~220 DEG C after the step (1) mixes new mineral aggregate.
Wherein, anti-rut agent is added in the step (2), mixing time is 5~10 seconds after mixing.
Waste asphalt pavement material is added in the step (3) and is increased and melts agent, mixing time is 10~15 seconds after mixing.
Wherein, the preheating temperature of asphalt binder is 155~165 DEG C in the step (4), and mixing time is 15 after mixing ~20s.
Preferably, it is further included before the step (4):
Asphalt binder after preheating is to stir into pitch knot after mixing the matrix pitch after preheating respectively and lake asphalt Close material;Wherein, the matrix pitch preheating temperature is 145~150 DEG C, and lake asphalt preheating temperature is 150~160 DEG C;After mixing Mixing time is 0.5~1 hour.
In order to prepare high-strength asphalt, the present invention plays the characteristics of lake asphalt hardness is big, and viscosity is high, meanwhile, it will be useless Aged asphalt is considered as a kind of hard grades of bitumen in old bitumen pavement material, with reference to additive, high-strength asphalt is prepared, in order to make Material meets deformation performance requirement and uniformity, need to add in certain proportion increasing and melt agent.Pitch in the waste asphalt pavement material 25 DEG C of needle penetrations are 21-23, unit:0.1mm, ring and ball softening point are 62-65 DEG C, are mixed available for preparing the high-strength pitch of the present invention Close material.Beneficial effects of the present invention:
1. the characteristics of asphalt of the present invention utilizes waste asphalt pavement material hardening brittle, and melt with reference to other increasings A kind of high-strength asphalt is prepared in agent, available for the section of high-strength asphalt mixture, that is, has dissolved conventional regeneration technology The waste asphalt pavement material being difficult to be utilized, and the performance of asphalt is improved, material cost is saved, solves heavily loaded friendship The tracks disease such as forehearth section, urban road intersection, public transportation lane, the asphalt are hard using waste asphalt pavement material The characteristics of changing embrittlement.
2. asphalt of the present invention has higher dynamic stability, up to 6000 times/more than mm, mixed than conventional pitch Material improves 5 times or more, and water stability, cryogenic property meet specification corresponding requirements simultaneously, and asphalt of the present invention has higher Compression rebound modulu, rutting deformation can be resisted under extreme conditions, as the bearing bed in bituminous paving, excellent mechanics Performance is to be enough to undertake certain traffic loading.
3. asphalt of the present invention has following advantageous effect:
(1) fines being difficult to be utilized in waste asphalt pavement material is dissolved, achievees the purpose that resource regeneration.
(2) bituminous paving integrated carrying ability is improved.
(3) material cost, more conventional anti-rutting asphalt mixture low cost are saved.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and specific implementation Mode is described in further detail the present invention.
Embodiment 1:
High-strength asphalt is admixed according to the component of following weight ratio, waste asphalt pavement material:New mineral aggregate: Anti-rut agent:Asphalt binder:Agent=15.75 are melted in increasing:85:0.4:4.4:0.06;Wherein asphalt binder is by lake asphalt:Matrix Pitch=30: 100 compositions;Old mineral aggregate in waste asphalt pavement material:Bituminous concrete surface=100:5;Bituminous concrete surface is met the requirements.The present invention High-strength asphalt in aggregate quality number it is as follows:
19-26.5mm:5 parts;
16-19mm:11 parts;
13.2-16mm:12 parts;
9.5-13.2mm:14 parts;
4.75-9.5mm:20 parts;
2.36-4.75mm:12 parts;
1.18-2.36mm:8 parts;
0.6-1.18mm:3 parts;
0.3-0.6mm:4 parts;
0.15-0.3mm:4 parts;
0.075-0.15mm:2 parts;
<0.075mm:5 parts.
Waste asphalt pavement material particle size<10mm, Asphalt Penetration (5s, 100g, 25 in the waste asphalt pavement material DEG C) it is 21 (0.1mm), softening point (TR&B) it is 62 DEG C.
The increasing melts agent as tapped oil, and 60 DEG C of viscosity are less than 1000cSt, flash-point>It 220 DEG C, is glued before and after Thin Film Oven Test TFOT Degree ratio<3, mass change absolute value<3.
Lake asphalt used is Trinidad Lake Asphalt, and matrix pitch used is AH-70 pitches.
1 lake asphalt performance requirement of table
Embodiment 2:
High-strength asphalt is admixed according to the component of following weight ratio, waste asphalt pavement material:New mineral aggregate: Anti-rut agent:Asphalt binder:Agent=15.9 are melted in increasing:85:0.3:4.3:0.08;Wherein asphalt binder is by lake asphalt:Matrix Pitch=30: 100 compositions;Old mineral aggregate in waste asphalt pavement material:Bituminous concrete surface=100:6;The high-strength pitch mixing of the present invention Expect that Mineral Material mass fraction is as follows:
19-26.5mm:6 parts;
16-19mm:11 parts;
13.2-16mm:10 parts;
9.5-13.2mm:14 parts;
4.75-9.5mm:20 parts;
2.36-4.75mm:12 parts;
1.18-2.36mm:8 parts;
0.6-1.18mm:4 parts;
0.3-0.6mm:4 parts;
0.15-0.3mm:4 parts;
0.075-0.15mm:2 parts;
<0.075mm:5 parts.
Waste asphalt pavement material particle size<10mm, Asphalt Penetration (5s, 100g, 25 in the waste asphalt pavement material DEG C) it is 22 (0.1mm), softening point (TR&B) it is 65 DEG C.
The increasing melts agent as tapped oil, and 60 DEG C of viscosity are less than 1000cSt, flash-point>It 220 DEG C, is glued before and after Thin Film Oven Test TFOT Degree ratio<3, mass change absolute value<3.
Lake asphalt used is Trinidad Lake Asphalt.
Embodiment 3:
High-strength asphalt is admixed according to the component of following weight ratio, waste asphalt pavement material:New mineral aggregate: Anti-rut agent:Asphalt binder:Agent=10.5 are melted in increasing:90:0.4:4.5:0.05;Wherein asphalt binder is by lake asphalt:Matrix Pitch=35: 100 compositions;Old mineral aggregate in waste asphalt pavement material:Bituminous concrete surface=100:5;The high-strength pitch mixing of the present invention Expect that Mineral Material mass fraction is as follows:
19-26.5mm:5 parts;
16-19mm:12 parts;
13.2-16mm:10 parts;
9.5-13.2mm:15 parts;
4.75-9.5mm:20 parts;
2.36-4.75mm:12 parts;
1.18-2.36mm:8 parts;
0.6-1.18mm:3 parts;
0.3-0.6mm:4 parts;
0.15-0.3mm:4 parts;
0.075-0.15mm:2 parts;
<0.075mm:5 parts.
Waste asphalt pavement material particle size<10mm, Asphalt Penetration (5s, 100g, 25 in the waste asphalt pavement material DEG C) it is 23 (0.1mm), softening point (TR&B) it is 64 DEG C.
The increasing melts agent and is less than 1000cSt, flash-point to subtract third fractional oil, 60 DEG C of viscosity>220 DEG C, before and after Thin Film Oven Test TFOT Ratio of viscosities<3, mass change absolute value<3.
Pitch used is Trinidad Lake Asphalt.
Preparation method and detection:
Preparation method:Plain asphalt is heated 145~150 DEG C first, lake asphalt is heated to 150~160 DEG C, and by than Example is mixed and stirred for 1~2h.It is proportionally mixed newly gathering materials, and be heated to 190~220 DEG C, proportionally adds in Rut resistance 5~10s is stirred in agent, is added in waste asphalt pavement material and is increased and melts agent, 10~15s of stirring, addition asphalt mastic (155~ 165 DEG C), 15~20s is stirred, high-strength asphalt is made.Drop temperature is 165~175 DEG C, and paving material is not less than 160 DEG C, temperature is initially rolled not less than 150 DEG C, and final pressure temperature is not less than 100 DEG C, and road table temperature is not higher than 50 DEG C during open to traffic.
High-strength performance of asphalt mixture is as shown in the table.
2 high-strength Asphalt Mixture Performance of table
3 high-strength asphalt other performances of table
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make other various Corresponding change and deformation, and all these changes and deformation should all belong to the protection domain of the claims in the present invention Within.

Claims (10)

1. a kind of high-strength asphalt, the mixture is by waste asphalt pavement material, asphalt binder, new mineral aggregate, additive Composition, weight ratio are (10-16):(4-5):(85-90):(0.25-0.5), asphalt binder is by lake asphalt:Matrix drips Green=(25-35):100 compositions;Total oilstone mass ratio is (Bituminous concrete surface+asphalt binder) in high-strength asphalt:(old mineral aggregate + new mineral aggregate)=(4-5) %, the additive by anti-rut agent and:Agent=(4-8) is melted in increasing:(1-2) is formed, the waste asphalt Bituminous concrete surface and old mineral aggregate content determine method in ground surface material:(1) waste asphalt pavement material co-grinding diameter<10mm, (2) Take part waste asphalt pavement material, reference《Highway engineering pitch and Asphalt Mixture Experiment regulation》T0722-2011 passes through Extraction test determines the ratio of old mineral aggregate and Bituminous concrete surface in waste asphalt pavement material, and (3) measure 25 DEG C of needle penetrations of Bituminous concrete surface not More than 30, unit:0.1mm, ring and ball softening point are not less than 60 DEG C.
2. high-strength asphalt according to claim 1, the lake asphalt is Trinidad Lake Asphalt, the matrix drip Blueness is AH-70 pitches;In the waste asphalt pavement material 25 DEG C of needle penetrations of pitch be 21-23, unit:0.1mm, ring and ball method are soft It is 62-65 DEG C to change point.
3. high-strength asphalt according to claim 1, the increasing melts agent as tapped oil or subtracts third fractional oil, 60 DEG C of viscosity Less than 1000cSt, flash-point>220 DEG C, ratio of viscosities before and after Thin Film Oven Test TFOT<3%, mass change absolute value<3.
4. high-strength asphalt according to claim 1, total mineral aggregate in the asphalt include new mineral aggregate and Old mineral aggregate, total mineral aggregate formate gradation composition are made of gathering materials for following particle size:
4 parts~6 parts of 19~26.5mm particles;
11 parts~12 parts of 16~19mm particles;
10 parts~12 parts of 13.2~16mm particles;
14 parts~15 parts of 9.5~13.2mm particles;
20 parts of 4.75~9.5mm particles;
12 parts of 2.36~4.75mm particles;
8 parts of 1.18~2.36mm particles;
2 parts~4 parts of 0.6~1.18mm particles;
4 parts of 0.3~0.6mm particles;
4 parts of 0.15~0.3mm particles;
2 parts of 0.075~0.15mm particles;
4 parts~6 parts of 0~0.075mm particles.
5. a kind of preparation method of high-strength asphalt, includes the following steps:
(1) it is heated after new mineral aggregate is mixed;
(2) anti-rut agent is added in, is stirred after mixing;
(3) it adds in waste asphalt pavement material and increases and melt agent, stirred after mixing;
(4) asphalt binder after preheating is added in, is stirred after mixing.
6. preparation method according to claim 5, heating temperature is 190~220 after the step (1) mixes new mineral aggregate ℃。
7. preparation method according to claim 5, the step (2) is middle to add in anti-rut agent, and mixing time is 5 after mixing ~10 seconds.
8. preparation method according to claim 5, agent is melted in the middle addition waste asphalt pavement material of the step (3) and increasing, Mixing time is 10~15 seconds after mixing.
9. preparation method according to claim 5, the preheating temperature of asphalt binder is 155~165 in the step (4) DEG C, mixing time is 15~20s after mixing.
10. preparation method according to claim 5, the asphalt binder after the preheating is by the matrix after preheating respectively Asphalt binder, which is stirred into, after pitch and lake asphalt mixing is warming up to 155~165 DEG C again;Wherein, matrix pitch preheating temperature is 145~150 DEG C, lake asphalt preheating temperature is 150~160 DEG C;Mixing time is 0.5~1 hour after mixing.
CN201810090707.4A 2017-06-08 2018-01-30 High-strength asphalt mixture and preparation method thereof Active CN108129074B (en)

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CN201710425979 2017-06-08

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CN108129074B CN108129074B (en) 2021-03-09

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CN112694287A (en) * 2021-02-09 2021-04-23 交通运输部公路科学研究所 Early-strength anti-loosening emulsified asphalt cold-recycling mixture and preparation method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110183147A (en) * 2019-04-30 2019-08-30 中国建筑土木建设有限公司 A kind of environment friendly road asphalt and preparation method thereof
CN110183147B (en) * 2019-04-30 2021-09-03 中国建筑土木建设有限公司 Asphalt mixture for environment-friendly road and preparation method thereof
CN112694287A (en) * 2021-02-09 2021-04-23 交通运输部公路科学研究所 Early-strength anti-loosening emulsified asphalt cold-recycling mixture and preparation method thereof

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