CN105859175A - Plant-mixed warm regenerated asphalt mixture of large-proportion RAP material - Google Patents
Plant-mixed warm regenerated asphalt mixture of large-proportion RAP material Download PDFInfo
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- CN105859175A CN105859175A CN201610254966.7A CN201610254966A CN105859175A CN 105859175 A CN105859175 A CN 105859175A CN 201610254966 A CN201610254966 A CN 201610254966A CN 105859175 A CN105859175 A CN 105859175A
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/02—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing the materials
- E01C19/10—Apparatus or plants for premixing or precoating aggregate or fillers with non-hydraulic binders, e.g. with bitumen, with resins, i.e. producing mixtures or coating aggregates otherwise than by penetrating or surface dressing; Apparatus for premixing non-hydraulic mixtures prior to placing or for reconditioning salvaged non-hydraulic compositions
- E01C19/1004—Reconditioning or reprocessing bituminous mixtures, e.g. salvaged paving, fresh patching mixtures grown unserviceable; Recycling salvaged bituminous mixtures; Apparatus for the in-plant recycling thereof
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a compound regeneration agent for a plant-mixed warm regenerated asphalt mixture of a large-proportion RAP material and a production method. The compound regeneration agent is obtained by mixing a regeneration agent, an asphalt adhesion reinforcing agent and an anti-ageing agent and then stirring for 5min to 10min under the condition that the temprature is 90 DEG C to 110 DEG C; the regenerated asphalt mixture is produced by recycled crushed waste asphalt road surface materials, new aggregate materials, the compound regeneration agent and warm mixed asphalt according to a procedure method. By adding a warm mixing agent and the compound regeneration agent, the utilization amount of a waste asphalt mixture is greatly improved on the basis of guaranteeing properties of the mixture; meanwhile, a construction temperature is 20 to 40 DEG C lower than traditional hot mixing and hot spreading, and the construction and the feasibility of asphalt concrete are improved.
Description
Technical field
The invention belongs to road asphalt compound technical field, be specifically related to a kind of vast scale RAP and expect plantmix's temperature
Reclaimed asphalt mixture and the preparation method of composite regenerant.
Technical background
In China, the construction on a large scale of asphalt concrete pavement is from the eighties in 20th century, and highway
Generally use and year be limited to 10-15.Present stage, having a large amount of highway to arrive service life, the whole nation is annual about
The high-grade highway having 12% needs overhaul, conservative estimation annual bituminous paving dead meal 2,200,000 tons.In addition people
The environmental problem be concerned about can not be ignored, can this non-renewable resources of Colophonium need more to treasure simultaneously,
The recycling old material of limits has become as a hot issue in industry.
Modal method is utilized to be hot in-plant reclaimed currently for asphalt pavement regeneration, although with traditional drip
Blue or green compound produces has compared the biggest advantage, but hot in-plant reclaimed asphalt mixture still also exists old material and adds
Rate is low;Regenerating mixture ageing of asphalt is serious;Compound produces power consumption height;Harmful gas emission is big;Mixing
Material mix construction temperature requires high drawback.Therefore to reduction energy consumption;Improve old material utilization rate;Reduce environment
Pollute;Reduce Bituminous concrete surface secondary at high temperature heat in RAP material aging, therefore, find one to improve
The mix ratio of RAP material, ensures that Asphalt Mixture production technology has the biggest value simultaneously.
In the exploitation of regenerative agent, all there are a considerable amount of research and practice, owing to major part is adopted both at home and abroad at present
With the immiscible material of copolymer resins Yu light oil, so certainly existing two problems, first is that cost is the highest, people
New Colophonium making again would rather be used, be also unwilling to use regenerative agent that asphalt waste is recycled, this
One of reason that Ye Shi China Recycling Old Asphalt Mixture is backward in technique, second, due to the lightweight in regenerative agent
Oil point, makes the Colophonium response to temperature after regeneration and ageing resistance poor, and the every annual meeting of China's Petrochemical produces various waste materials,
Mostly it is discharged through simple process or burns, not only causing the burden of environment, and containing a large amount of in these waste materials
Useful material, only causes huge waste because present technology cannot process, therefore, from cost.Environment and
Twice laid considers, we select from the waste material of refinery, and real accomplishes the treatment of wastes with processes of wastes against one another, turns waste into wealth.
Summary of the invention
The present invention to solve to be the technology little for RAP material adding proportion in regenerating mixture production process
Problem.This production technology can to a greater extent on utilize reclaimed materials, in the method RAP material recovery utilization rate
Reach more than 70%.Meanwhile, the secondary reducing RAP material medium pitch is aging, it is ensured that asphalt road property
While energy, reach the effect of energy-saving and emission-reduction.
It is an object of the invention to be achieved through the following technical solutions:
A kind of vast scale RAP material plantmix temperature reclaimed asphalt mixture composite regenerant, component be regenerative agent,
Asphalt adhesion reinforcing agent and antiaging agent, preparation method is:
Prepare composite regenerant: after regenerative agent, asphalt adhesion reinforcing agent and antiaging agent being mixed, in temperature
Stir 5min~10min under conditions of being 150 DEG C~160 DEG C, obtain composite regenerant;Described composite regenerant
The mass content of middle regenerative agent is 80%~85%, and the mass content of asphalt adhesion reinforcing agent is 1%~10%,
The mass content of antiaging agent is 5%~10%.
And, the fragrance of described regenerative agent divides 46%, saturated point 43%, colloid 10%, asphalitine 1%.
And, described asphalt adhesion reinforcing agent is that the molecular weight that amino amine is derived is up to 30000-40000.
And, described antiaging agent is furfural oil.
A kind of vast scale RAP expects the production method of plantmix's temperature reclaimed asphalt mixture, and step is as follows:
(1) carried reclaiming the old bitumen pavement material after crushing to heat by belt transport in 70-90% ratio, enter
Enter cylinder, carry out heating heating-up temperature 110-130 DEG C, weigh, store for future use;
(2) the cylinder by mixing machine that newly gathers materials is heated to 190-210 DEG C, is carried by heat, after screening, enter heat
Feed bin, is weighed by the requirement of proportioning 10-30%, to mixing in pot;
(3) reclaimed materials adds mix pot, and after the mixing of new and old compound, temperature reaches 120-130 DEG C, then sprays
Composite regenerant, composite regenerant addition is usually in reclaimed asphalt mixture the 1%-3% of total asphalt quality,
Stirring 10-20s;Described composite regenerant is that the vast scale RAP described in claim 1 expects plantmix's temperature regeneration drip
Blue or green compound composite regenerant;
(4) add warm-mixed asphalt, mix 15s~20s according to the design optimum oil-stone ratio of proportion design process;
(5) breeze is added mix pot, the 1-2% of breeze addition total quality, mix 10-20s, it is thus achieved that temperature
Reclaimed asphalt mixture.
And, the preparation method of described warm-mixed asphalt is: be 150 DEG C~160 DEG C by warm-mixing agent and Colophonium in temperature
Under conditions of stir 5min~10min, obtain warm-mixed asphalt;The mass content of warm-mixing agent in described warm-mixed asphalt
It is 5%~10%.
And, described warm-mixing agent is aliphatic compound class warm-mixing agent, fusing point between 94-114 DEG C,
Carbon number alkane more than 22;
Advantages of the present invention and good effect are as follows:
1, the warm reclaimed asphalt mixture renovation process milling material adding proportion that the present invention provides is high, milling material
Adding proportion is 70%-90%, improves 40%-60% than conventional thermal reproduction, and other parts are primarily to mend
Filling the grating of compound, temperature regeneration is greatly improved the utilization rate of old material, saves and produce while protection environment
Cost.
2, the present invention also provides for a kind of composite regenerant, in process of production, by regenerative agent and warm-mixing agent
Adding, milling material actively heating-up temperature is 110-120 DEG C, and the heating-up temperature newly gathered materials is 190-210 DEG C, finished product
Material drop temperature 120-130 DEG C.
3, the present invention addition by warm-mixing agent, the viscosity greatly reducing Bituminous concrete surface reaches the effect of warm mix,
Drop temperature substantially reduces, simultaneously construction temperature relatively conventional thermal mix heat paving low 30-40 DEG C, improve Colophonium coagulation
The construction workability of soil.
Specific embodiment
In order to understand the present invention, below in conjunction with embodiment, the invention will be further described: following embodiment is to say
Bright property, be not determinate, it is impossible to limit protection scope of the present invention with following embodiment.
A kind of preparation prepared composite regenerant and prepare warm-mixed asphalt, comprises the following steps:
(1) prepare composite regenerant: in temperature after regenerative agent, asphalt adhesion reinforcing agent and antiaging agent being mixed
Stir 5min~10min under conditions of being 90 DEG C~110 DEG C, obtain composite regenerant;In described composite regenerant
The mass content of regenerative agent is 80%~85%, and the mass content of asphalt adhesion reinforcing agent is 1%~10%,
The mass content of antiaging agent is 5%~10%;
(2) prepare warm-mixed asphalt: warm-mixing agent and Colophonium are stirred under conditions of temperature is 90 DEG C~110 DEG C
5min~10min, obtains warm-mixed asphalt;In described warm-mixed asphalt, the mass content of warm-mixing agent is 5%~10%.
The composition of described composite regenerant is: regenerative agent mass content is 80%~85%, and regenerative agent is Fushun stone
Oil one factory provides, and asphalt adhesion reinforcing agent is the U.S. angstrom Stevr--asphalt anti-stripping agent External-2500,
Its mass content is 1%~10%, described antiaging agent be furfural oil, the mass content of antiaging agent be 5%~
10%.
Wherein said asphalt adhesion reinforcing agent is the U.S. angstrom Stevr--asphalt anti-stripping agent External-2500,
Be the molecular weight being derived by amino amine be up to 30000-40000 (molecular weight of common antistripping agent be about
2000), having outstanding heat stability, flash-point reaches more than 200 DEG C, deposits several weeks under conditions of 170 DEG C
After still can keep original more than 90% antistrip performance, be low abnormal smells from the patient, the environment-friendly products of low smog simultaneously.
Described antiaging agent is furfural oil, calls furtural, molecular formula C5H4O2;C4H3OCHO.
Described regenerative agent is refinery's waste material of the fragrant lean wax of a kind of richness, fragrance point 46%, saturated point 43%, colloid 10%,
Asphalitine 1%.
Described warm-mixing agent is that organic fall of Shenzhen Haichuan Engineering Technology Co., Ltd's exploitation sticks type warm-mixing agent EC120,
It is mainly composed of aliphatic compound, and fusing point is between 94-114 DEG C, and exterior appearance is schistose granular solid.
Wherein aliphatic hydrocarbon has: carbon number carbochain alkane more than 22 and the alkane with its principal component
Mixture.
The main production of the present invention is as follows:
One, carry out crushing and sieving by the reclaimed materials of milling, be divided into thickness two grades, analyzed by extraction test old
The bitumen content of material and grating.
Two, select 5 bitumen aggregate ratios, be that the bitumen aggregate ratio being spaced carries out mix material proportioning design with 0.3%, utilize rotation
Turn compactor 6 marshal pieces of molding under conditions of each described bitumen aggregate ratio, then design according to Marshall
Method determines that the optimum oil-stone ratio of warm-mixed recycled asphalt mixture sample, described bitumen aggregate ratio are that warm mix regeneration asphalt mixes
Close the quality of new Colophonium in material samples and newly gather materials and the ratio of new powdered ore quality sum, described marshal piece
Forming temperature is 110 DEG C~130 DEG C, and the concrete preparation process of described warm-mixed recycled asphalt mixture sample is:
(1) RAP expected, newly gather materials (10%-30%) and composite regenerant is 120 DEG C~the bar of 130 DEG C in temperature
Mix 10-20s under part, obtains mixture X;The consumption of described composite regenerant is Bituminous concrete surface in described RAP material
The 1%~3% of quality;
(2), under conditions of temperature is 120 DEG C~130 DEG C, add warm-mixed asphalt, mix 15s~20s, obtain
Mixture Y.The consumption of warm-mixed asphalt adds according to the design optimum oil-stone ratio of proportion design process.
The newest breeze is joined in mixture Y, mix under conditions of temperature is 120 DEG C~130 DEG C
15s~25s, obtains warm-mixed recycled asphalt mixture sample.
Embodiment 1
Vast scale RAP expects plantmix's temperature reclaimed asphalt mixture, and production method is as follows:
(1) carried reclaiming the old bitumen pavement material (RAP) after crushing to heat by belt transport in 70% ratio,
Enter cylinder, carry out heating heating-up temperature 110-130 DEG C, weigh, store for future use.
(2) the cylinder by mixing machine that newly gathers materials is heated to 190-210 DEG C, is carried by heat, after screening, enter heat
Feed bin, is weighed by proportioning 30% requirement, to mixing in pot.
(3) reclaimed materials is added mix pot (after the mixing of new and old compound, temperature reaches 120-130 DEG C), then sprays
Spill composite regenerant (consumption be described RAP material in Bituminous concrete surface quality 1%~3%), stir 10-20s.
(4) add warm-mixed asphalt according to the design optimum oil-stone ratio (generally 0.5%-1.5%) of proportion design process,
Mix 15s~20s.
(5) breeze (0-3%) is added mix pot, mix 10-20s.
The composition of described composite regenerant: regenerative agent mass content is 85%, regenerative agent is that Fushun oil one factory carries
Confession, asphalt adhesion reinforcing agent is the U.S. angstrom Stevr--asphalt anti-stripping agent External-2500, its quality
Content is 0%, and described antiaging agent is furfural oil, and the mass content of antiaging agent is 5%.
Vast scale RAP of the present invention expects that the construction method of plantmix's temperature regeneration mixes hot black top compound with traditional heat
Construction method is essentially identical.Warm-Mix Bitumen Mixture compaction technology should follow " closely follow, high frequency, by a narrow margin, at the uniform velocity,
Few water " principle.
For verifying that the quality of vast scale RAP material temperature of the present invention regeneration does following experiment.
Relevant regulations pair according to " highway engineering Colophonium and Asphalt Mixture Experiment code " (JTJE20-2011)
The asphalt of the embodiment of the present invention 1, tradition hot-mixed asphaltic concrete carry out immersion Marshall stability, freeze
Melt cleavage strength, mixture density, infiltration coefficient carry out testing the test data such as following table of gained:
, testing job site, core sample is closely knit meanwhile, and compactness reaches more than the 97% of test chamber standard,
Pavement seepage coefficient and the structure degree of depth are the most qualified.The reclaimed asphalt mixture produced meets " highway asphalt road
Face regeneration techniques specification " (FTGF41-2008) engineering grating require mixture performance.
The above, be only presently preferred embodiments of the present invention, not impose any restrictions the present invention.Every basis
Any simple modification, change and the equivalence change that above example is made by inventive technique essence, all still falls within
In the protection domain of technical solution of the present invention.
Claims (7)
1. a vast scale RAP expects plantmix's temperature reclaimed asphalt mixture composite regenerant, it is characterised in that: component is regenerative agent, asphalt adhesion reinforcing agent and antiaging agent, and preparation method is:
Prepare composite regenerant: after regenerative agent, asphalt adhesion reinforcing agent and antiaging agent being mixed, under conditions of temperature is 150 DEG C~160 DEG C, stirs 5min~10min, obtains composite regenerant;In described composite regenerant, the mass content of regenerative agent is 80%~85%, and the mass content of asphalt adhesion reinforcing agent is 1%~10%, and the mass content of antiaging agent is 5%~10%.
Vast scale RAP the most according to claim 1 material plantmix temperature reclaimed asphalt mixture composite regenerant, it is characterised in that: the fragrance of described regenerative agent divides 46%, saturated point 43%, colloid 10%, asphalitine 1%.
Vast scale RAP the most according to claim 1 expects plantmix's temperature reclaimed asphalt mixture composite regenerant, it is characterised in that: described asphalt adhesion reinforcing agent is that the molecular weight that amino amine is derived is up to 30000-40000.
Vast scale RAP the most according to claim 1 expects plantmix's temperature reclaimed asphalt mixture composite regenerant, it is characterised in that: described antiaging agent is furfural oil.
5. the production method of vast scale RAP material plantmix temperature reclaimed asphalt mixture, it is characterised in that: step is as follows:
(1) carried reclaiming the old bitumen pavement material after crushing to heat by belt transport in 70-90% ratio, enter cylinder, carry out heating heating-up temperature 110-130 DEG C, weigh, store for future use;
(2) the cylinder by mixing machine that newly gathers materials is heated to 190-210 DEG C, is carried by heat, enter hot aggregate bin after screening, weigh by the requirement of proportioning 10-30%, to mixing in pot;
(3) reclaimed materials adds mix pot, and after the mixing of new and old compound, temperature reaches 120-130 DEG C, then sprays composite regenerant, and composite regenerant addition is usually in reclaimed asphalt mixture the 1%-3% of total asphalt quality, stirs 10-20s;Described composite regenerant is that the vast scale RAP described in claim 1 expects plantmix's temperature reclaimed asphalt mixture composite regenerant;
(4) add warm-mixed asphalt, mix 15s~20s according to the design optimum oil-stone ratio of proportion design process;
(5) breeze is added mix pot, the 1-2% of breeze addition total quality, mix 10-20s, it is thus achieved that temperature reclaimed asphalt mixture.
Vast scale RAP the most according to claim 5 expects the production method of plantmix's temperature reclaimed asphalt mixture, it is characterized in that: the preparation method of described warm-mixed asphalt is: warm-mixing agent and Colophonium are stirred 5min~10min under conditions of temperature is 150 DEG C~160 DEG C, obtains warm-mixed asphalt;In described warm-mixed asphalt, the mass content of warm-mixing agent is 5%~10%.
Vast scale RAP the most according to claim 6 material plantmix temperature reclaimed asphalt mixture composite regenerant, it is characterised in that: described warm-mixing agent is aliphatic compound class warm-mixing agent, fusing point between 94-114 DEG C, carbon number alkane more than 22.
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Cited By (8)
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CN106316219A (en) * | 2016-08-18 | 2017-01-11 | 酒泉通达路桥有限责任公司 | Recycled asphalt mixture and preparation method thereof |
CN106946501A (en) * | 2017-03-22 | 2017-07-14 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
CN108316094A (en) * | 2018-03-19 | 2018-07-24 | 六安市交通公路实业有限公司 | A kind of bituminous paving reclaimed materials and its warm mix regeneration technology |
CN109400009A (en) * | 2018-11-08 | 2019-03-01 | 重庆市智翔铺道技术工程有限公司 | Remelting casting type heat regeneration asphalt mixture and preparation method thereof |
CN109534723A (en) * | 2018-11-09 | 2019-03-29 | 龙德建设有限公司 | A kind of preparation method of warm-mixed recycled asphalt mixture |
CN112853866A (en) * | 2021-01-13 | 2021-05-28 | 陕西中霖集团工程设计研究有限公司 | Thermal regeneration method for asphalt pavement |
CN113235359A (en) * | 2021-01-26 | 2021-08-10 | 蔡立军 | Production and processing technology of anti-ultraviolet aging asphalt |
CN114892464A (en) * | 2022-05-24 | 2022-08-12 | 上海缤德新材料科技有限公司 | High-doping-amount milling material regenerated thin layer and construction method thereof |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106316219A (en) * | 2016-08-18 | 2017-01-11 | 酒泉通达路桥有限责任公司 | Recycled asphalt mixture and preparation method thereof |
CN106316219B (en) * | 2016-08-18 | 2018-07-13 | 甘肃省酒泉公路管理局 | A kind of reclaimed asphalt mixture and preparation method thereof |
CN106946501A (en) * | 2017-03-22 | 2017-07-14 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
CN106946501B (en) * | 2017-03-22 | 2019-07-19 | 泰州职业技术学院 | Concrete debris regenerated aggregate Warm-Mix Bitumen Mixture and preparation method thereof |
CN108316094A (en) * | 2018-03-19 | 2018-07-24 | 六安市交通公路实业有限公司 | A kind of bituminous paving reclaimed materials and its warm mix regeneration technology |
CN109400009A (en) * | 2018-11-08 | 2019-03-01 | 重庆市智翔铺道技术工程有限公司 | Remelting casting type heat regeneration asphalt mixture and preparation method thereof |
CN109534723A (en) * | 2018-11-09 | 2019-03-29 | 龙德建设有限公司 | A kind of preparation method of warm-mixed recycled asphalt mixture |
CN112853866A (en) * | 2021-01-13 | 2021-05-28 | 陕西中霖集团工程设计研究有限公司 | Thermal regeneration method for asphalt pavement |
CN113235359A (en) * | 2021-01-26 | 2021-08-10 | 蔡立军 | Production and processing technology of anti-ultraviolet aging asphalt |
CN114892464A (en) * | 2022-05-24 | 2022-08-12 | 上海缤德新材料科技有限公司 | High-doping-amount milling material regenerated thin layer and construction method thereof |
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Application publication date: 20160817 |