CN109721286A - A kind of heat-resisting Recycled Asphalt Pavement and preparation method thereof - Google Patents
A kind of heat-resisting Recycled Asphalt Pavement and preparation method thereof Download PDFInfo
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- CN109721286A CN109721286A CN201910050551.1A CN201910050551A CN109721286A CN 109721286 A CN109721286 A CN 109721286A CN 201910050551 A CN201910050551 A CN 201910050551A CN 109721286 A CN109721286 A CN 109721286A
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- asphalt pavement
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- 238000002360 preparation method Methods 0.000 title claims abstract description 50
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- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical group [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 description 2
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- 102100033842 General transcription factor IIF subunit 2 Human genes 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
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- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000005211 alkyl trimethyl ammonium group Chemical group 0.000 description 1
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
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- JHLNERQLKQQLRZ-UHFFFAOYSA-N calcium silicate Chemical compound [Ca+2].[Ca+2].[O-][Si]([O-])([O-])[O-] JHLNERQLKQQLRZ-UHFFFAOYSA-N 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of heat-resisting Recycled Asphalt Pavements and preparation method thereof.Heat-resisting Recycled Asphalt Pavement includes following components: new pitch, regenerative agent, steel slag, ceramic, miberal powder, is newly gathered materials, silica, glass fibre at RAP material；Regenerative agent includes following components: base oil, dispersing agent, alkylated diphenylamine antioxidant, methylene chloride, ultraviolet absorbing agent, cumyl peroxide, surfactant, SBS modifier, dehydrated alcohol, butadiene-styrene rubber powder, hollow glass micropearl；Preparation method are as follows: S1, collect RAP material；S2, the first mixture of preparation；S3, the second mixture of preparation；S4, preparation third mixture；S5, finished product preparation.Crack resistance, durability and the high temperature resistant Rut resistance of heat-resisting Recycled Asphalt Pavement of the invention deform more excellent；In addition, preparation method of the invention has the advantages that pitch is made to be evenly distributed.
Description
Technical field
The present invention relates to highway engineering technical field, more specifically, it relates to a kind of heat-resisting Recycled Asphalt Pavement and
Preparation method.
Background technique
With the development of national economy and highway communication cause, the specific gravity of the medium-and-large-sized goods stock of haulage vehicle constantly increases
Add, the increase year by year of the volume of traffic, in addition pavement structure is in vehicular load, especially in the prevalence of overload of vehicle and the phenomenon that transfinite
It is under the repeated action of loaded vehicle load, and in wheel edge failure by shear occurs for mixture, and asphalt surface course generates irrecoverable
Residual deformation and accumulate rapidly, or crack, and gradually extend, cause structure sheaf that the diseases such as track and fatigue occur, it is right
Highway causes serious influence, leads to early damage to pavement, and service life greatly shortens, and Pavement Condition decaying is accelerated,
Therefore more stringent requirements are proposed for the material of road pavement.People's also increasingly saving and utilization of emphasis resource in recent years simultaneously,
Also more extensive as regeneration techniques develop to the development and utilization of milling waste material, technical staff is constantly inquiring into such as
What make reclaimed asphalt mixture compared with low production cost and it is convenient to carry out in the case where have preferable performance.
In the prior art, application No. is disclose a kind of fibre in 201610170219.5 Chinese invention patent application file
Composite regenerated bituminous concrete is tieed up, is prepared by following components by weight: 0-5mm Recycled Asphalt Pavement RAP30
Part, RAP25 parts of 5-10mm Recycled Asphalt Pavement, RAP28 parts of 10-30mm Recycled Asphalt Pavement, 10-30mm newly gathers materials 15
Part, 2 parts of miberal powder, 1.5 parts of cement, 1 part of 4 parts of emulsified asphalt and regenerative agent and 1.2 parts of glass fibre.
Existing this fiber composite Recycled Asphalt Pavement uses Coarse Graded Bituminous Concrete, increases the partial size to gather materials,
And tensile property and cracking resistance that glass fibre increases mixture are added, but since bituminous pavement temperature stability is poor, summer
Weather temperature is high, sunshine foot, and bituminous pavement easily absorbs heat thawings, will cause bituminous pavement not after causing strength reduction, vehicle to be ground
It is smooth, influence the service life of bituminous pavement.
How under the premise of not reducing the cracking resistance of bituminous concrete, propose that one kind still has at high operating temperatures
Higher rutting resistance, and the Recycled Asphalt Pavement with durability, are that those skilled in the art's technology to be solved is asked
Topic.
Summary of the invention
In view of the deficienciess of the prior art, the first purpose of this invention is to provide a kind of coagulation of resistance to heat regeneration asphalt
Soil has the advantages that crack resistance, durability, heat-resisting quantity and Rut resistance deformability are preferable.
Second object of the present invention is to provide a kind of preparation method of heat-resisting Recycled Asphalt Pavement, old with making
Change pitch and merges uniform advantage with regenerative agent.
To realize above-mentioned first purpose, the present invention provides the following technical scheme that a kind of heat-resisting Recycled Asphalt Pavement,
It is characterised in that it includes the component of following parts by weight: 60-90 parts of new pitch, 50-70 parts of RAP material, 2-6 parts of regenerative agents, 10-20
Part steel slag, 10-20 parts of ceramics, 4-9 parts of miberal powders, 10-20 parts newly gather materials, 1-5 parts of silica, 3-8 parts of glass fibres；
The regenerative agent comprises the following components in parts by weight: 80-100 parts of base oils, 10-20 parts of dispersing agents, 1-5 parts of alkylated diphenylamines
Antioxidant, 0.5-2 part methylene chloride, 10-30 parts of ultraviolet absorbing agents, 0.1-0.5 parts of cumyl peroxides, 10-15 parts of tables
Face activating agent, 0.5-1.5 part SBS modifier, 10-20 parts of dehydrated alcohols, 10-20 parts of butadiene-styrene rubber powder, 5-10 parts of hollow glass
Glass microballon.
The usage amount newly gathered materials is reduced using this waste of steel slag by using above-mentioned technical proposal, it can be effective
Reduction is cut into a mountain fried stone, is playing the role of preserving the ecological environment to a certain degree, the main component of steel slag is calcium, iron, magnesium, aluminium etc.
Oxide, and in steel slag contain tricalcium silicate similar with cement, dicalcium silicate and ferrous aluminate isoreactivity minerals, tool
There is hydraulic gelling, the density of steel slag is big, intensity is high, rough surface, stability are good, wearability and durability are good, with pitch knot
It closes securely, can be improved the intensity of heat-resisting Recycled Asphalt Pavement, so that the Rut resistance for improving heat-resisting Recycled Asphalt Pavement becomes
Shape ability.
The main component of ceramic is silica and aluminum oxide, is a kind of intensity height and hard microballoon, divides
It is good to dissipate property, heat resisting temperature is high, the addition of ceramic, can be improved the compactness of heat-resisting Recycled Asphalt Pavement, durability,
Heat-resisting quantity and machine capability, glass fibre are that a kind of heat resistance is strong, and the inorganic non-metallic material of high mechanical strength is mixed
With in Recycled Asphalt Pavement, the tensile strength of heat-resisting Recycled Asphalt Pavement can be enhanced, prevent its cracking, titanium dioxide
Silicon has chemical inertness, can be improved the resistance to corrosion of bituminous pavement, and it has the performance of high temperature resistance, is dispersed in pitch
In concrete, cooperates with steel slag, the heat-resisting ability of bituminous pavement can be further enhanced.
Because the thermal conductivity of steel slag is higher than commonly gathering materials, to the more demanding of regenerative agent, and the water absorption rate of steel slag is high,
When making Recycled Asphalt Pavement, regenerative agent is easy to be adsorbed by steel slag, can not expect to merge with RAP, it is therefore desirable to regenerative agent
Improved, softening agent is done with methylene chloride in the present invention, when regenerative agent and aged asphalt can be made to contact with each other, softening is old
Change pitch, contact aged asphalt with regenerative agent sufficiently, uniformly, uvioresistant auxiliary agent can be improved resistance to heat regeneration asphalt for fusion
The anti-ultraviolet property of concrete improves durability and ageing-resistant performance, and dehydrated alcohol is used as fusion agent, can make regenerative agent and
Aged asphalt rapid fusion, butadiene-styrene rubber powder are cross-linked with each other with new pitch and aged asphalt, form three-dimensional net structure, from
And wear-resisting property, heat resistance and the ageing-resistant performance of bituminous pavement are greatly improved, hollow glass micropearl has light, low lead
The advantages that heat, high-melting-point, higher intensity, good chemical stability, surface have oleophyllie hydrophobic by specially treated
Can, it when being mixed with base oil, can rapidly be dispersed in base oil, since the inside of hollow glass micropearl is thin
Air, therefore it has good thermal insulation separation thermal property, the heat resistance and Rut resistance that can be improved heat-resisting bituminous pavement become
Shape ability.
Further, the regenerative agent the preparation method is as follows: (1) by base oil, surfactant and dispersing agent be added
In reactor, it is heated to 150-170 DEG C, 20-30min is stirred at 1000-1500r/min, stirs evenly；
(2) butadiene-styrene rubber powder and hollow glass micropearl are stirred under the revolving speed of 500-800r/min 30-40min, are added anti-
It answers in device, sequentially adds cumyl peroxide and dehydrated alcohol is added in reactor, under conditions of 140-180 DEG C,
Stir 30-50min with the revolving speed of 800- 1000r/min, be added when naturally cooling to 60-80 DEG C methylene chloride, SBS modifier,
Ultraviolet absorbing agent and alkylated diphenylamine antioxidant continue to stir 30-50min, squeeze as in 120-140 DEG C of extruder
Regenerative agent out.
By using above-mentioned technical proposal, base oil, surfactant and dispersing agent are mixed first, then by butylbenzene rubber
Rubber powder end and hollow glass micropearl are stirred mixing, and each raw material and high molecular material can be made uniformly to mix, rapid generation
Rationality set is prepared and improves RAP material utilization rate, improves RAP material and newly gather materials, the caking property of new pitch and steel slag, improves resistance to
High-temperature stability, crack resistance and the anti-fatigue performance of heat regeneration asphalt concrete.
Further, it is (2-4): (1-1.5): tung oil, turpentine oil and the rubber oil of (3-5) that the base oil, which is mass ratio,
The mixture of composition, rubber oil are naphthenic rubber oil.
Pitch can be provided in long-term ageing by using above-mentioned technical proposal to contain a large amount of mineral oil in tung oil
Lost lightweight oil ingredient in the process, and contain the higher unsaturated fatty acid of a large amount of boiling points in tung oil, it is regenerated in aged asphalt
High temperature resistance with higher in the process, tung oil can not only reduce the viscosity of RAP material, be also beneficial to improve the low of pitch
Warm nature energy, turpentine oil have good dissolubility, and its permeance property that can be improved regenerative agent to pitch, accelerate regenerative agent
Speed is merged when mixing with aged asphalt, improves the rate of recovery of aged asphalt, rubber oil belongs to environmentally friendly machine, can
Guarantee the balance of component in regeneration asphalt, and can be improved the high temperature resistance of aged asphalt, tung oil and turpentine oil phase interworking
It closes, can speed up merge speed of the regenerative agent with aged asphalt, and improve the high temperature resistance of pitch, tung oil and naphthenic base rubber
Glue oil cooperates, and can balance the component in regeneration asphalt, improve the high-temperature stability of regeneration asphalt, turpentine oil and cycloalkanes
The collaboration of base rubber oil uses, and can accelerate merge speed of the regenerative agent with aged asphalt, balances the component in regeneration asphalt, improves
The high temperature resistance of regeneration asphalt.
Further, the dispersing agent is (0.5-1): the stearmide and higher alcohol mixing group of (15-20) by mass ratio
At higher alcohol is one of n-butanol, isobutanol, isoamyl alcohol and normal propyl alcohol.
By using above-mentioned technical proposal, stearmide is used in mixed way with higher alcohol, can be improved dispersion effect, and change
The lubricity and thermal stability of kind regenerative agent, and then improve the mixed effect and heat resistance of heat-resisting Recycled Asphalt Pavement.
Further, the surfactant is hexadecyltrimethylammonium chloride, in octadecyltrimethylammonium chloride
One or two kinds of mixtures.
By using above-mentioned technical proposal, hexadecyltrimethylammonium chloride and octadecyltrimethylammonium chloride can
The degrees of fusion for improving the old and new's pitch, makes the old and new's pitch form relatively stable and new asphalt interface, improves resistance to heat regeneration asphalt
Caking property, intensity and the high-temperature stability of concrete.
Further, the RAP material that the RAP material is expected including the RAP that 30% partial size is 1-8mm, 40% partial size is 8-15mm
With the RAP material that 30% partial size is 15-25mm.
By using above-mentioned technical proposal, the content of fines is more in particle lesser RAP material, utilization rate when regeneration
It is low, therefore the RAP material that partial size is 1-8mm, 8-15mm and 15-25mm is selected to be compounded, the utilization rate of RAP material can be improved.
Further, it is 3.5- that the bitumen aggregate ratio of the 1-8mmRAP material, which is the bitumen aggregate ratio of 3-4%, 8-15mmRAP material,
4.1%, the bitumen aggregate ratio of 15-25mmRAP material is 2.8-3.2%.
By using above-mentioned technical proposal, the bitumen aggregate ratio of RAP material is rationally controlled, the resistance to height of Recycled Asphalt Pavement can be improved
Warm nature can be with Rut resistance deformability.
Further, the new pitch is one of No. 70 pitches of matter and SBS modified pitch.
By using above-mentioned technical proposal, the needle penetration of No. 70 pitches and SBS modified pitch is big, and softening temperature is high, and 70
15 DEG C of ductilities of number pitch and 5 DEG C of ductilities of SBS modified pitch are larger, can be improved the heat-resisting quantity of Recycled Asphalt Pavement
Energy, cracking resistance and durability, and SBS pitch is styrene-butadiene-styrene triblock copolymer, the modified drip of SBS
Two phase structure is significantly presented in polystyrene chain segment and polybutadiene segments in blueness, and this two-phase laminated flow structure can be with drip
Green matrix forms space multistory network structure, to be effectively improved the temperature performance of pitch, tensile property, elasticity, cohesion attachment
Performance, the stability of mixture, resistance to ag(e)ing etc., wherein SBS modified pitch high temperature resistant with higher and anti-seismic design,
The temperature stability of asphalt concrete pavement can be effectively improved, and SBS modified pitch has preferable rutting resistance, bullet
Property and good toughness, improve the anti-fatigue ability on road surface, reduce the permanent deformation on road surface.
Further, described newly to gather materials including 10-15 parts of 1-3mm limestone, 20-30 parts of 3-5mm limestone, 5-10 parts
The basalt of basalt and 5-10 part 10-16mm of 5-10mm.
By using above-mentioned technical proposal, what different-grain diameter gradation obtained newly gathers materials and is preparing heat-resisting Recycled Asphalt Pavement
When, it can be filled between the basaltic hole of greater particle size compared with the limestone of small particle, make heat-resisting Recycled Asphalt Pavement
When being laid with, surface compact, to improve the Rut resistance deformability and cracking resistance of heat-resisting Recycled Asphalt Pavement, and profound
The high temperature resistance of Wu Yan is good, and water absorption rate is low, the strong and wear-resisting advantage of crushing resistance, for energy in heat-resisting Recycled Asphalt Pavement
Enough improve high temperature resistance, anti-permeability performance and the cracking resistance of heat-resisting Recycled Asphalt Pavement.
To realize above-mentioned second purpose, the present invention provides the following technical scheme that a kind of heat-resisting Recycled Asphalt Pavement
Preparation method, which comprises the following steps:
S1, RAP material: the old aggregate of the damaged pitch of milling is collected, and carries out sizing screening, form RAP material；
S2: the first mixture of preparation: 5-10min is dried under conditions of 140-160 DEG C by newly gathering materials, the new pitch with 60% amount
It stirs evenly, the first mixture is made；
S3, the second mixture of preparation: regenerative agent is preheated into 10-15min at 110-130 DEG C, RAP material dries at 100-120 DEG C
Dry 30- 40min, steel slag heating are heated to 5-10min at 180-210 DEG C, and regenerative agent, RAP material and steel slag after preheating are mixed
With, the regenerative agent after mixing and stirring, RAP material and steel slag are added in the first mixture, are stirred, it is uniformly mixed, it is mixed to be made second
Close object；
S4, preparation third mixture: the new pitch of remaining 40% amount is added in the second mixture, and third is made in uniform mixing
Mixture；
S5, finished product preparation: miberal powder is preheated into 5-10min at 140-160 DEG C, is added in third mixture, is added after uniform mixing
Enter glass fibre, ceramic and silica, Recycled Asphalt Pavement is made in uniform mixing.
By using above-mentioned technical proposal, since Bituminous concrete surface is weathered in RAP material, consistency is very big, and mobility is very poor,
It is carried out in mixing process with newly gathering materials, Bituminous concrete surface can not be evenly distributed to all new surface of aggregate, and new pitch is in two times
It is added, during mixing and stirring, new pitch and newly gathers materials and first mixed and stirred, avoid the absorption because newly gathering materials with RAP material to new pitch
Wrap up a large amount of new pitch on the material of RAP caused by ability is different, and the less phenomenon of upper new pitch of newly gathering materials, it has fully considered new
Gather materials with RAP material to the difference of new pitch adsorption capacity, new surface of aggregate can be made to wrap up in attached more new pitch, so that regeneration drip
Pitch distribution is more uniform in green concrete, dries to RAP material, because if RAP material heating temperature is too low, to meet
The drop temperature of mixture then needs excessively to improve the heating temperature newly gathered materials, and new aggregate quality is caused to decline, and heats temperature
When spending high, asphalt melting in RAP material is not only caused, RAP material is made to bond agglomerating occluding device, and is will cause in RAP material again
The further aging of aged asphalt, influences the quality of Recycled Asphalt Pavement.
In conclusion the invention has the following advantages:
The first, since the present invention uses steel slag and ceramic as the raw material for preparing heat-resisting Recycled Asphalt Pavement, can subtract
Few usage amount newly gathered materials, preserves the ecological environment, economizes on resources simultaneously, accomplish the regeneration of resource, because of the hardness of steel slag
Greatly, wearability is good, intensity is high, and preferable with the adhesiveness of pitch, can adhere in steel slag incorporation new pitch and aged asphalt
On the two surface, improve the intensity, Rut resistance deformability and heat resistance of bituminous pavement, ceramic be intensity it is higher and
Hard microballoon, heat resisting temperature are high, cooperate with steel slag, can be improved the compactness, strong of heat-resisting Recycled Asphalt Pavement
Degree and wearability, to improve Rut resistance deformability, durability and the high temperature resistance of bituminous pavement.
The second, regenerative agent is prepared using hollow glass micropearl, dehydrated alcohol and methylene chloride in the present invention, due to hollow glass
The thermal coefficient of glass microballon is small, fusing point is high, intensity is high, and the surface Jing Guo specially treated has oleophyllie hydrophobic, can fill
Be dispersed in base oil, improve the heat resisting temperature of regenerative agent, make the bituminous pavement being laid to have heat preservation and insulation it is good,
The advantage that intensity is higher, heat resistance is good, methylene chloride can soften new pitch and aged asphalt, make new pitch, aging drip
It is green, newly gather materials, the mixing of steel slag and ceramic when, fusion is uniform, prevents steel slag from causing regenerative agent complete because water absorption rate is higher
It is adsorbed by steel slag, dehydrated alcohol can make new pitch and aged asphalt rapid fusion, form stable new asphalt interface.
Using oil based on tung oil, turpentine oil and naphthenic rubber oil, tung oil can be aged asphalt by third, the present invention
Lightweight oil ingredient is provided, and the higher unsaturated fatty acid of boiling point wherein contained can be improved heat-resisting Recycled Asphalt Pavement
Heat resistance, while reduce RAP material viscosity, make RAP material merged with new pitch and regenerative agent sufficiently, turpentine oil can add
The fusion speed of fast regenerative agent and aged asphalt, naphthenic rubber oil can balance the component in regeneration asphalt, three's phase interworking
It closes, the heat resistance that merges speed and regeneration asphalt of the regenerative agent with aged asphalt can be further increased.
4th, method of the invention, by by new pitch in two times with newly gather materials with RAP material mix, new pitch can be made to exist
Newly gather materials and wrap up more uniform on RAP material, prevent from newly gathering materials and expect with RAP because the adsorption capacity to new pitch is different, and causes newly
The upper new pitch package that gathers materials is more, and new pitch package is less on RAP material.
Specific embodiment
Invention is further described in detail with reference to embodiments.
The preparation example 1-3 of regenerative agent
Lc-0001 type tung oil, the turpentine oil that tung oil is selected from that Lv Cheng Chemical Co., Ltd. in Shandong sells in preparation example 1-3 are selected from Jinan
AOX-68 type turpentine oil, the naphthenic rubber oil of fly Chemical Co., Ltd. sale are selected from Shanghai Ju Dao Chemical Co., Ltd. and go out
KN4010 type ring alkyl rubber oil, the alkylated diphenylamine antioxidant sold are selected from what Sheng great Chemical Company in Jinzhou sold
T534 type alkylated diphenylamine antioxidant, SBS modifier are selected from the YH- that plastic material business department, Dongguan City Huang Jiangsheng nation sells
It is purple that 801 type SBS modifying agent, ultraviolet absorbing agent are selected from the UV-531 type that Dongguan City Kang Jin new material Science and Technology Ltd. sells
Ultraviolet absorbers, butadiene-styrene rubber powder are selected from the YDH-SBR type styrene butadiene rubber powder that Yu Dahang Trade Co., Ltd. in Beijing sells
End, hollow glass micropearl are selected from the hollow glass micropearl that the article No. that Lingshou County Feng Heng mineral products processing factory sells is fj032.
Preparation example 1: according to the proportion in table 1, (1) adds 80kg base oil, 10kg surfactant and 10kg dispersing agent
Enter in reactor, be heated to 150 DEG C, stirs 20min at 1000r/min, stir evenly, wherein base oil is by mass ratio
The mixture that tung oil, turpentine oil and the rubber oil of 2:1:3 forms, rubber oil are naphthenic rubber oil, and surfactant is 16
Alkyl trimethyl ammonium chloride, dispersing agent are the mixture of the stearmide that mass ratio is 0.5:15 and n-butanol composition；
(2) 10kg butadiene-styrene rubber powder and 5kg hollow glass micropearl are stirred under the revolving speed of 500r/min 30min, are added anti-
It answers in device, sequentially adds 0.1kg cumyl peroxide and 10kg dehydrated alcohol is added in reactor, in 140 DEG C of item
Under part, 30min is stirred with the revolving speed of 800r/min, 0.5kg methylene chloride is added when naturally cooling to 60 DEG C, 0.5kgSBS changes
Property agent, 10kg ultraviolet absorbing agent and 1.0kg alkylated diphenylamine antioxidant, continue stir 30min, as 120 DEG C of extrusion
Regenerative agent is squeezed out in machine；Wherein the partial size of butadiene-styrene rubber powder is 180 μm, and the partial size of hollow glass micropearl is 150 μm, regeneration
The partial size of agent is 2cm.
The raw material proportioning of regenerative agent in 1 preparation example 1-3 of table
Preparation example 2: according to the proportion in table 1, (1) 90kg base oil, 13kg surfactant and 15kg dispersing agent is added anti-
It answers in device, is heated to 160 DEG C, stir 25min at 1300r/min, stir evenly, wherein base oil is 3:1.3 by mass ratio:
The mixture that 4 tung oil, turpentine oil and rubber oil forms, rubber oil are naphthenic rubber oil, and surfactant is octadecyl
Trimethyl ammonium chloride, dispersing agent are the mixture of the stearmide that mass ratio is 0.8:18 and n-butanol composition；
(2) 15kg butadiene-styrene rubber powder and 8kg hollow glass micropearl are stirred under the revolving speed of 700r/min 35min, are added anti-
It answers in device, sequentially adds 0.3kg cumyl peroxide and 15kg dehydrated alcohol is added in reactor, in 160 DEG C of item
Under part, 40min is stirred with the revolving speed of 900r/min, 1.0kg methylene chloride is added when naturally cooling to 70 DEG C, 1.0kgSBS changes
Property agent, 20kg ultraviolet absorbing agent and 3.0kg alkylated diphenylamine antioxidant, continue stir 40min, as 130 DEG C of extrusion
Regenerative agent is squeezed out in machine, wherein the partial size of butadiene-styrene rubber powder is 190 μm, and the partial size of hollow glass micropearl is 124 μm of regenerative agents
Partial size be 3cm.
Preparation example 3: according to the proportion in table 1, (1) is by 100kg base oil, 15kg surfactant and 20kg dispersing agent
It is added in reactor, is heated to 170 DEG C, stirs 30min at 1500r/min, stir evenly, wherein base oil is by mass ratio
For the mixture that the tung oil, turpentine oil and rubber oil of 4:1.5:5 form, rubber oil is naphthenic rubber oil, and surfactant is
Octadecyltrimethylammonium chloride, dispersing agent are the mixture of the stearmide that mass ratio is 1:20 and n-butanol composition；
(2) 20kg butadiene-styrene rubber powder and 10kg hollow glass micropearl are stirred under the revolving speed of 800r/min 40min, are added anti-
It answers in device, sequentially adds 0.5kg cumyl peroxide and 20kg dehydrated alcohol is added in reactor, in 180 DEG C of item
Under part, 50min is stirred with the revolving speed of 1000r/min, 2.0kg methylene chloride is added when naturally cooling to 80 DEG C, 1.5kgSBS changes
Property agent, 30kg ultraviolet absorbing agent and 5.0kg alkylated diphenylamine antioxidant, continue stir 50min, as 140 DEG C of extrusion
Regenerative agent is squeezed out in machine, wherein the partial size of butadiene-styrene rubber powder is 200 μm, and the partial size of hollow glass micropearl is 104 μm, regeneration
The partial size of agent is 4cm.
Embodiment
Glass fibre is selected from the glass fibre that the article No. that Huimin County Qinghe town will big chemical fibre netting factory sells is 44954, pottery
Porcelain micro mist is selected from Shanghai remittance smart sub-nanometer new material Co., Ltd, and silica is selected from the limited public affairs of Shijiazhuang first rays of the morning sun refractory material
The A130 type silica sold is taken charge of, steel slag is selected from the steel slag that the article No. that Lingshou County lark mineral products processing factory sells is 005,
The miberal powder that miberal powder is KZF01 selected from the article No. that Lingshou County Jin Yuan mining industry processing factory sells, No. 70 pitches and SBS modified pitch
Performance indicator is shown in Table 2 and table 3 respectively.
The performance indicator of 2 No. 70 pitch of table
| Index | No. 70 pitches |
| (15 DEG C/(g/cm of density3) | 1.036 |
| Flash-point/DEG C | > 300 |
| Wax content (way of distillation)/% | 1.90 |
| 10 DEG C of ductility/cm | 36.4 |
| Penetration index PI value | -1.041 |
| 60 DEG C of dynamic viscosity/Pas | 222 |
| Mass change/% after TFOT | -0.079 |
| Penetration ratio (25 DEG C, %) are remained after TFOT | 76.41 |
| Ductility (10 DEG C, cm) are remained after TFOT | 9.8 |
| Solubility/% | 99.97 |
The performance indicator of 3 SBS modified pitch of table
| Index | SBS modified pitch |
| Flash-point/DEG C | > 300 |
| Elasticity restores 25 DEG C | 825 |
| 135 DEG C/Pas of kinematic viscosity | 222 |
| Mass change/% after TFOT | -0.1 |
| Penetration ratio (25 DEG C, %) are remained after TFOT | 72 |
| Ductility (5 DEG C, cm) are remained after TFOT | 17 |
| Solubility/% | 99.75 |
Embodiment 1: a kind of heat-resisting Recycled Asphalt Pavement, raw material proportioning is as shown in table 4, the preparation of the heat-resisting regeneration concrete
Method the following steps are included:
S1, RAP material is collected: according to the proportion in table 4, the old aggregate of the damaged pitch of milling, and sizing screening is carried out, it is formed
50kgRAP material, the RAP material and 30% partial size that RAP material is expected including the RAP that 30% partial size is 1mm, 40% partial size is 8mm are 15mm
RAP material；The bitumen aggregate ratio for the RAP material that the bitumen aggregate ratio for the RAP material that partial size is 1mm is 3%, partial size is 8mm is 3.5%, partial size is
The bitumen aggregate ratio of the RAP material of 15mm is 2.8%；
S2: the first mixture of preparation: 10kg is newly gathered materials and dries 5min under conditions of 140 DEG C, with 36kg70 asphalt mixing
Uniformly, the first mixture is made；Newly gather materials including 10kg partial size be 1mm limestone, 20kg partial size be 3mm limestone,
The basalt that the basalt and 5kg partial size that 5kg partial size is 5kg are 10mm；
S3, the second mixture of preparation: preheating 10min for 2kg regenerative agent at 110 DEG C, and RAP material dries 30min at 100 DEG C,
The heating of 10kg steel slag is heated to 5min at 180 DEG C, regenerative agent, RAP material and steel slag after preheating is mixed and stirred, after mixing and stirring
Regenerative agent, RAP material and steel slag be added the first mixture in, be stirred, be uniformly mixed, be made the second mixture, regenerative agent by
Preparation example 1 is prepared；
S4, preparation third mixture: remaining 24kg70 pitch is added in the second mixture, uniform mixing, it is mixed that third is made
Close object；
S5, finished product preparation: 4kg miberal powder is preheated into 5min at 140 DEG C, is added in third mixture, 3kg is added after uniform mixing
Recycled Asphalt Pavement, the length of glass fibre is made in glass fibre, 10kg ceramic and 1kg silica, uniform mixing
Degree is 3mm, and the partial size of ceramic is 0.2 μm, and the partial size of silica is 5.5 μm.
The raw material proportioning of heat-resisting Recycled Asphalt Pavement in 4 embodiment 1-5 of table
Embodiment 2: a kind of heat-resisting Recycled Asphalt Pavement, raw material proportioning is as shown in table 4, the preparation of the heat-resisting regeneration concrete
Method the following steps are included:
S1, RAP material is collected: according to the proportion in table 4, the old aggregate of the damaged pitch of milling, and sizing screening is carried out, it is formed
70kgRAP material, the RAP material and 30% partial size that RAP material is expected including the RAP that 30% partial size is 5mm, 40% partial size is 12mm are
The RAP of 20mm expects；The bitumen aggregate ratio for the RAP material that partial size is 5mm is 3.5%, the bitumen aggregate ratio that the RAP that partial size is 12mm expects is
3.8%, the bitumen aggregate ratio for the RAP material that partial size is 20mm is 3.0%；
S2: the first mixture of preparation: 13kg is newly gathered materials and dries 8min under conditions of 150 DEG C, with 42kg70 asphalt mixing
Uniformly, the first mixture is made；Newly gather materials including 13kg partial size be 2mm limestone, 25kg partial size be 4mm limestone,
The basalt that the basalt and 8kg partial size that 8kg partial size is 8kg are 14mm；
S3, the second mixture of preparation: preheating 13min for 3kg regenerative agent at 120 DEG C, and RAP material dries 35min at 110 DEG C,
The heating of 12kg steel slag is heated to 8min at 190 DEG C, regenerative agent, RAP material and steel slag after preheating is mixed and stirred, after mixing and stirring
Regenerative agent, RAP material and steel slag be added the first mixture in, be stirred, be uniformly mixed, be made the second mixture, regenerative agent by
Preparation example 2 is prepared；
S4, preparation third mixture: remaining 28kg70 pitch is added in the second mixture, uniform mixing, it is mixed that third is made
Close object；
S5, finished product preparation: 5kg miberal powder is preheated into 8min at 150 DEG C, is added in third mixture, 4kg is added after uniform mixing
Recycled Asphalt Pavement, the length of glass fibre is made in glass fibre, 12kg ceramic and 3kg silica, uniform mixing
Degree is 6mm, and the partial size of ceramic is 0.3 μm, and the partial size of silica is 5.5 μm.
Embodiment 3: a kind of heat-resisting Recycled Asphalt Pavement, raw material proportioning is as shown in table 4, the heat-resisting regeneration concrete
Preparation method the following steps are included:
S1, RAP material is collected: according to the proportion in table 4, the old aggregate of the damaged pitch of milling, and sizing screening is carried out, it is formed
75kgRAP material, the RAP material and 30% partial size that RAP material is expected including the RAP that 30% partial size is 8mm, 40% partial size is 15mm are
The RAP of 25mm expects；The bitumen aggregate ratio for the RAP material that the bitumen aggregate ratio of RAP that partial size is 8mm material is 4%, partial size is 15mm is 4.1%,
The bitumen aggregate ratio for the RAP material that partial size is 25mm is 3.2%；
S2: the first mixture of preparation: 15kg is newly gathered materials and dries 10min under conditions of 160 DEG C, with 45kg70 asphalt mixing
Uniformly, the first mixture is made；Newly gather materials including 15kg partial size be 3mm limestone, 30kg partial size be 5mm limestone,
The basalt that the basalt and 10kg partial size that 10kg partial size is 10kg are 16mm；
S3, the second mixture of preparation: preheating 15min for 4kg regenerative agent at 130 DEG C, and RAP material dries 40min at 120 DEG C,
The heating of 15kg steel slag is heated to 10min at 210 DEG C, regenerative agent, RAP material and steel slag after preheating is mixed and stirred, after mixing and stirring
Regenerative agent, RAP material and steel slag be added the first mixture in, be stirred, be uniformly mixed, be made the second mixture, regenerative agent by
Preparation example 3 is prepared；
S4, preparation third mixture: remaining 30kg70 pitch is added in the second mixture, uniform mixing, it is mixed that third is made
Close object；
S5, finished product preparation: 6kg miberal powder is preheated into 10min at 160 DEG C, is added in third mixture, is added after uniform mixing
Recycled Asphalt Pavement is made in 6kg glass fibre, 15kg ceramic and 3kg silica, uniform mixing, glass fibre
Length is 9mm, and the partial size of ceramic is 0.4 μm, and the partial size of silica is 5.5 μm.
Embodiment 4-5: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, raw material proportioning such as 4 institute of table
Show, the preparation method of the heat-resisting Recycled Asphalt Pavement is same as Example 1.
Embodiment 6: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, new pitch is the modified drip of SBS
The preparation method of blueness, the heat-resisting Recycled Asphalt Pavement is same as Example 1.
Comparative example
Comparative example 1: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, steel slag is not added in raw material.
Comparative example 2: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, it is micro- that ceramics are not added in raw material
Powder.
Comparative example 3: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, it is not added in regenerative agent hollow
Glass microballoon.
Comparative example 4: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, dichloro is not added in regenerative agent
Methane.
Comparative example 5-10: a kind of heat-resisting Recycled Asphalt Pavement, the difference from embodiment 1 is that, the raw material base of regenerative agent
The mass ratio of tung oil, turpentine oil and naphthenic rubber oil is ("/" indicates to be free of the substance in table) as shown in table 5 in plinth oil.
The mass ratio of tung oil, turpentine oil and naphthenic rubber oil in 5 comparative example 5-10 of table
Performance detection test
Recycled Asphalt Pavement is prepared according to the method in embodiment 1-6 and comparative example 1-10, and again according to following standard detection
The properties of bituminous concrete are given birth to, the testing result of Recycled Asphalt Pavement made from embodiment 1-6 is as shown in table 6, comparison
The testing result of Recycled Asphalt Pavement made from example 1-10 is as shown in table 6:
1, it needle penetration: is tested according to GB/T4509-2010 " Asphalt Penetration measuring method "；
2, it is measured according to GB/T4507-2010 " asphalt softening point measuring method "；
3, it ductility: is measured according to GB/T4508-2010 " effecting determination of asphalt ductility method ", testing result is as shown in table 6；
4, freeze-thaw split retained strength ratio: according in JTJ052-2000 " highway engineering pitch and Asphalt Mixture Experiment regulation "
The method of T0729- 2000 is measured；
5, soak Marshall residual stability: being surveyed according to T0709-2000 " Bituminous Mixtures MLS Stabilization Experiment "
It is fixed；
6, dynamic stability: according to the T0719- in JTGE20-2011 " highway engineering pitch and Asphalt Mixture Experiment regulation "
2011 are measured；
7, fatigue test: according to NFP98-261-1, " the measurement first part of Asphalt Mixtures Fatigue Properties: constant winding degree is curved
Qu Bianhua test " it is measured.
The performance test results of heat-resisting Recycled Asphalt Pavement made from each embodiment of table 6 and each comparative example
The softening point of the heat-resisting Recycled Asphalt Pavement prepared it can be seen from data in table 6 according to method in embodiment 1-6
Height, reaches 94 DEG C or more, and needle penetration is in 27mm hereinafter, 10 DEG C of ductility is in 56/cm or more, and freeze-thaw split intensity
Preferable than, immersion Marshall residual stability, dynamic stability, fatigue performance is good, illustrate according to method preparation in the present invention
Heat-resisting Recycled Asphalt Pavement has good heat resistance, Rut resistance deformability, ageing-resistant performance and durability.
Comparative example 1 because being not added with steel slag in heat-resisting Recycled Asphalt Pavement, the needle penetration of heat-resisting Recycled Asphalt Pavement with
Embodiment 1 is compared to significantly increasing, and softening point is reduced to 68 DEG C, 10 DEG C of ductilities, freeze-thaw split intensity ratio, immersion Marshall residual
The performance test results such as stability are obvious compared with Example 1 to be deteriorated, and fatigue test numerical value reduces, and illustrates mixing for steel slag
Enter the heat resistance that can significantly improve heat-resisting Recycled Asphalt Pavement, Rut resistance deformability and ageing-resistant performance, makes heat-resisting
The pavement performance of Recycled Asphalt Pavement is preferable.
Comparative example 2 is because being not added with ceramic in heat-resisting Recycled Asphalt Pavement, the resistance to hot recycling drip as made from comparative example 2
The softening point of green concrete and 10 DEG C of ductilities are substantially reduced, and needle penetration increases, the property such as freeze-thaw split intensity ratio and fatigue test
It can be deteriorated, illustrate that the addition of ceramic can be improved Rut resistance deformability, the endurance of heat-resisting Recycled Asphalt Pavement
Performance and high temperature resistance.
Comparative example 3 is because being not added with hollow glass micropearl in regenerative agent, the heat-resisting Recycled Asphalt Pavement as made from comparative example 3
Compared with the heat-resisting Recycled Asphalt Pavement made from the embodiment, needle penetration increases, and softening point and 10 DEG C of ductilities reduce, freeze thawing
Ratio of split strength, immersion Marshall residual stability decline obviously, say that hollow glass micropearl can be improved resistance to heat regeneration asphalt
The softening point of concrete reduces needle penetration, increases the heat resistance of Recycled Asphalt Pavement, Rut resistance deformability and durable
Property.
Because being not added with methylene chloride in regeneration, the needle of heat-resisting Recycled Asphalt Pavement as made from comparative example 4 enters comparative example 4
The test results such as degree and 10 DEG C of ductilities are compared with Example 1, poor, illustrate that methylene chloride can be improved resistance to heat regeneration asphalt
High temperature resistance, durability and the Rut resistance deformability of concrete.
It is not added with naphthenic rubber oil in the oil of 5 gene basis of comparative example, is not added with turpentine oil in the oil of 6 gene basis of comparative example, it is right
The properties of heat-resisting Recycled Asphalt Pavement made from ratio 5 and comparative example 6 are poor compared with Example 1, illustrate naphthenic base
Rubber oil and turpentine oil can be improved the high temperature resistance and Rut resistance deformability of heat-resisting Recycled Asphalt Pavement, and energy
Enough make heat-resisting Recycled Asphalt Pavement that there is stronger cracking resistance and durability, is not added with simultaneously in the oil of 3 gene basis of comparative example
Naphthenic rubber oil and turpentine oil, the performance test results and comparative example 1 of heat-resisting Recycled Asphalt Pavement made from comparative example 3
It is compared with heat-resisting Recycled Asphalt Pavement the performance test results made from comparative example 2, properties are poor, illustrate naphthenic base
Rubber oil and turpentine oil have good compounding effect, and naphthenic rubber oil and turpentine oil use, can significantly improve it is heat-resisting again
High temperature resistance, Rut resistance deformation performance, durability and the crack resistance of raw bituminous concrete.
Tung oil, the properties of heat-resisting Recycled Asphalt Pavement made from comparative example 8 are not added in the oil of 8 gene basis of comparative example
It is poor compared with Example 1, it is not added with tung oil and turpentine oil in the oil of 9 gene basis of comparative example, it is heat-resisting as made from comparative example 9
Compared with Recycled Asphalt Pavement items test result heat-resisting Recycled Asphalt Pavement made from the comparative example 8 and comparative example 6,
It is poor, illustrate that tung oil and turpentine oil mutually cooperate with, the heat resistance of heat-resisting Recycled Asphalt Pavement, anti-vehicle can be significantly improved
Rut deformability and durability.
10 gene basis of comparative example oil in simultaneously be not added with tung oil and naphthenic rubber oil, as made from comparative example 10 it is heat-resisting again
The properties test result of raw bituminous concrete, compared with the heat-resisting Recycled Asphalt Pavement made from comparative example 5, the comparative example 8
It is poor, illustrate tung oil and naphthenic rubber oil synergistic effect, can be improved heat-resisting Recycled Asphalt Pavement heat resistance,
Rut resistance deformability and ageing-resistant performance.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in scope of the presently claimed invention.
Claims (10)
1. a kind of heat-resisting Recycled Asphalt Pavement, which is characterized in that comprise the following components in parts by weight: 60-90 parts of new pitch,
50-70 parts of RAP material, 2-6 portions of regenerative agents, 10-20 parts of steel slags, 10-20 parts of ceramics, 4-9 parts of miberal powders, 10-20 parts newly gather materials,
1-5 parts of silica, 3-8 parts of glass fibres；
The regenerative agent comprises the following components in parts by weight: 80-100 parts of base oils, 10-20 parts of dispersing agents, 1-5 parts of alkylations two
Aniline antioxidant, 0.5-2 part methylene chloride, 10-30 parts of ultraviolet absorbing agents, 0.1-0.5 parts of cumyl peroxides, 10-15
Part surfactant, 0.5-1.5 parts of SBS modifiers, 10-20 parts of dehydrated alcohols, 10-20 parts of butadiene-styrene rubber powder, 5-10 parts of skies
Heart glass microballoon.
2. heat-resisting Recycled Asphalt Pavement according to claim 1, which is characterized in that the preparation method of the regenerative agent is such as
Under: (1) base oil, surfactant and dispersing agent are added in reactor, 150-170 DEG C are heated to, in 1000-1500r/
20-30min is stirred under min, is stirred evenly；
(2) butadiene-styrene rubber powder and hollow glass micropearl are stirred under the revolving speed of 500-800r/min 30-40min, are added anti-
It answers in device, sequentially adds cumyl peroxide and dehydrated alcohol is added in reactor, under conditions of 140-180 DEG C,
Stir 30-50min with the revolving speed of 800-1000r/min, be added when naturally cooling to 60-80 DEG C methylene chloride, SBS modifier,
Ultraviolet absorbing agent and alkylated diphenylamine antioxidant continue to stir 30-50min, as squeezing out in 120-140 DEG C of extruder
Regenerative agent.
3. heat-resisting Recycled Asphalt Pavement according to claim 2, which is characterized in that the base oil is that mass ratio is
(2-4): (1-1.5): the mixture that tung oil, turpentine oil and the rubber oil of (3-5) form, rubber oil are naphthenic rubber oil.
4. heat-resisting Recycled Asphalt Pavement according to claim 2, which is characterized in that the dispersing agent is by mass ratio
(0.5-1): the stearmide and higher alcohol of (15-20) mix composition, and higher alcohol is n-butanol, isobutanol, isoamyl alcohol and positive third
One of alcohol.
5. heat-resisting Recycled Asphalt Pavement according to claim 2, which is characterized in that the surfactant is hexadecane
The mixture of one or both of base trimethyl ammonium chloride, octadecyltrimethylammonium chloride.
6. heat-resisting Recycled Asphalt Pavement according to claim 1, which is characterized in that the RAP material includes that 30% partial size is
The RAP material that the RAP material and 30% partial size that RAP material, 40% partial size of 1-8mm is 8-15mm are 15-25mm.
7. heat-resisting Recycled Asphalt Pavement according to claim 1, which is characterized in that the bitumen aggregate ratio of the 1-8mmRAP material
Bitumen aggregate ratio for 3-4%, 8-15mmRAP material is that the bitumen aggregate ratio of 3.5-4.1%, 15-25mmRAP material is 2.8-3.2%.
8. heat-resisting Recycled Asphalt Pavement according to claim 1, which is characterized in that the new pitch is No. 70 pitches of matter
One of with SBS modified pitch.
9. heat-resisting Recycled Asphalt Pavement according to claim 1, which is characterized in that described newly to gather materials including 10-15 parts
The basalt of 1-3mm limestone, 20-30 parts of 3-5mm limestone, the basalt of 5-10 parts of 5-10mm and 5-10 parts of 10-16mm.
10. a kind of preparation method of -9 described in any item heat-resisting Recycled Asphalt Pavements according to claim 1, feature exist
In, comprising the following steps:
S1, RAP material: the old aggregate of the damaged pitch of milling is collected, and carries out sizing screening, form RAP material；
S2: the first mixture of preparation: 5-10min is dried under conditions of 140-160 DEG C by newly gathering materials, the new pitch with 60% amount
It stirs evenly, the first mixture is made；
S3, the second mixture of preparation: regenerative agent is preheated into 10-15min at 110-130 DEG C, RAP material dries at 100-120 DEG C
Dry 30-40min, steel slag heating are heated to 5-10min at 180-210 DEG C, and regenerative agent, RAP material and steel slag after preheating are mixed
With, the regenerative agent after mixing and stirring, RAP material and steel slag are added in the first mixture, are stirred, it is uniformly mixed, it is mixed to be made second
Close object；
S4, preparation third mixture: the new pitch of remaining 40% amount is added in the second mixture, and it is mixed that third is made in uniform mixing
Close object；
S5, finished product preparation: miberal powder is preheated into 5-10min at 140-160 DEG C, is added in third mixture, is added after uniform mixing
Enter glass fibre, ceramic and silica, Recycled Asphalt Pavement is made in uniform mixing.
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| CN110700033A (en) * | 2019-09-06 | 2020-01-17 | 北京中天路业科技有限公司 | Method for preparing durable asphalt concrete old material regeneration additive by utilizing waste tire rubber powder |
| CN110790535A (en) * | 2019-12-05 | 2020-02-14 | 广东高翔建设有限公司 | Maintenance method of asphalt road |
| CN110922098A (en) * | 2019-11-21 | 2020-03-27 | 宏辉建材有限公司 | Regenerated asphalt mixture and preparation method thereof |
| CN111505253A (en) * | 2020-03-25 | 2020-08-07 | 东南大学 | Evaluation method for distribution uniformity of regenerant in aged asphalt |
| TWI710539B (en) * | 2019-06-05 | 2020-11-21 | 輔英科技大學 | Insulation bricks made from inorganic slag and sludge |
| CN112321201A (en) * | 2020-11-25 | 2021-02-05 | 宁波东兴沥青制品有限公司 | High-density asphalt concrete and preparation method thereof |
| CN112960940A (en) * | 2021-02-07 | 2021-06-15 | 枣阳市锦烨节能建材有限公司 | Recycled asphalt concrete and preparation method thereof |
| CN113372041A (en) * | 2021-07-13 | 2021-09-10 | 上海繁荣道路建设工程有限公司 | Asphalt mixture and preparation method thereof |
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| CN112321201A (en) * | 2020-11-25 | 2021-02-05 | 宁波东兴沥青制品有限公司 | High-density asphalt concrete and preparation method thereof |
| CN112321201B (en) * | 2020-11-25 | 2021-08-20 | 宁波东兴沥青制品有限公司 | High-density asphalt concrete and preparation method thereof |
| CN112960940A (en) * | 2021-02-07 | 2021-06-15 | 枣阳市锦烨节能建材有限公司 | Recycled asphalt concrete and preparation method thereof |
| CN113372041A (en) * | 2021-07-13 | 2021-09-10 | 上海繁荣道路建设工程有限公司 | Asphalt mixture and preparation method thereof |
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