CN104710134B - A kind of stable storing, ageing-resistant particle modified bituminous concretes of composite S BS and preparation method thereof - Google Patents
A kind of stable storing, ageing-resistant particle modified bituminous concretes of composite S BS and preparation method thereof Download PDFInfo
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Abstract
A kind of stable storing, the ageing-resistant particle modified bituminous concretes of composite S BS and preparation method thereof of the present invention, composite S BS particles include SBS15% 38%, deep activation rubber powder 56% 82%, interfacial compatibilizer 3% 6%, wherein the deep activation rubber powder is made up of rubber powder, softening oil and activator.This method utilizes the high temperature of double screw extruder, high shear forces to obtain deep activation rubber powder in waste Crumb rubber.It is sufficiently mixed SBS particles/deep activation rubber powder using the blending effect of screw rod and is granulated and prepare composite S BS particles, modified asphalt concrete is prepared by composite S BS particles.Compared to conventional SBS modified dose, the particle modified bituminous concrete ageing-resistant performance of composite S BS of the invention is fabulous, and thermmal storage does not separate out substantially.Junked tire can be largely consumed, is mitigated " black pollution ".City noise pollution can be reduced, road table microstructure is advantageous to road surface drainage, mitigation water splashes, improves traffic safety performance.
Description
Technical field
The present invention relates to a kind of construction material for engineering field, more particularly to a kind of stable storage, ageing-resistant answer
Close particle modified bituminous concretes of SBS and preparation method thereof.
Background technology
At present, polymer is added to improve the performance of matrix pitch and then obtain modified asphalt concrete to be extensive in the industry
Accreditation.Styrene butadiene block copolymer (SBS) is a kind of ripe polymer modified asphalt modifying agent, and its dosage accounts for modification
More than half of agent total amount.Feature of the thermoplastic elastomer SBS due to having rubber and plastics two-phase concurrently, modified drip prepared therefrom
Green grass or young crops has good high temperature performance, is provided simultaneously with preferable modification recovery capability, is a kind of excellent modifying agent.But its
Fancy price, higher modified asphalt material cost limit SBS extensive use.Therefore, people are look for one kind more
The more excellent asphalt modifier of economy, performance, to substitute SBS.Be related to mix in SBS modified pitch at present a small amount of rubber powder with
The report of composite modified asphalt.The ripe rubber powder mode of production is ambient ground grinding method.
China has substantial amounts of waste old to produce every year, and SBS composite modified asphalts are substituted using rubber powder part, can
It is effective to save rubber sources, it can also promote the recycling of waste old, not cause " secondary pollution ", while its is cheap
Price can also reduce the modified pitch cost of raw material to a certain extent.Patent CN102601975A reports a kind of using double
Screw extruder continuously extrudes the method for liquid reclaimed rubber, and introduces example and performance that liquid regeneration glue substitutes matrix pitch,
Though performance makes moderate progress but DeGrain.Patent CN102977621A reports a kind of rubber powder and SBS composite modified asphalt
Method.Its SBS incorporation is 0.5-6%, and rubber powder incorporation is 0.5-12%, and mineral powder loading is 0.5-8%.It is this
Method can improve the ageing resistace of modified pitch to a certain extent, while high-temperature behavior also has certain improvement.But hand over
Join the incorporation of the rubber powder of state, cause SBS modified pitch network stabilization to decline, reduce the cryogenic property of modified pitch.Together
When, the rubber powder incorporation of crosslinking condition, which absorbs light component and is swelled, causes the viscosity of modified pitch substantially to rise, and adds the difficulty of construction
Degree.The rubber powder incorporation of this method is relatively low, and SBS volumes are of a relatively high, and the reduction contribution rate to modified pitch cost is limited.
Patent CN101812234A reports a kind of method of waste rubber powder/waste plastics material/SBS composite modified asphalts.Its scrap rubber
Volume 5-15% in powder, waste plastics 1-5%, SBS1-3%.This method first puts into waste plastics at 120-150 DEG C matrix drip
Green grass or young crops, stirring and dissolving, 180-200 DEG C is then raised temperature to, put into shoddy and SBS, stirring 0.5-3 hours prepare modified pitch.This
The waste plastics incorporation of kind method is higher, although the high-temperature behavior of modified pitch is preferably improved, due to plastics
Black brittleness the characteristics of can cause modified pitch cryogenic property notable loss, meanwhile, it is this only with being dispersed with stirring
Mode it is difficult to ensure that SBS it is uniform, refinement, the modified pitch network structure of formation is unstable, cannot preferably be modified drip
Blue or green effect.Simultaneously as adding more crisp plastics, the cryogenic property and anti-fatigue performance of its ground surface material have larger damage
Lose.
Patent CN103146206A reports a kind of preparation method of the composite modified asphalt of stable storing.This method is first
SBS and rubber powder powder are put into double screw extruder in proportion, rubber powder/SBS grains are prepared through high temperature (more than 190 DEG C) blending extrusion
Son, the SBS shearings that 0-5% is then added in 130-170 DEG C of matrix pitch disperse and add 1-20% SBS/ rubber powder grains
Son and 5% or so furfural extract oil, stirring development 3-5 hours prepare composite modified asphalt.This method is in high temperature, high shear
Under the conditions of SBS and rubber powder prepared particle by blending, this high temperature, high shear can cause SBS to degrade, and then weaken its modification
Effect；Meanwhile under no external assistant activator auxiliary, only by hot shearing, rubber powder can not reach overactive state, protect
Substantial portion of cross-linked structure is stayed, a large amount of admixtures of the rubber powder particle of this cross-linked structure can lift modified pitch system viscosity,
Increase difficulty of construction.And this method is mixed with the higher furfural extract oil of price, this reduction to modified pitch cost is simultaneously
Without benefit.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, propose a kind of new stable storing, ageing-resistant answer
Particle modified bituminous concretes of SBS and preparation method thereof are closed, the problem of scrap rubber cycling and reutilization can be solved, can reduce and change again
SBS addition contents in property bituminous concrete, and significantly improve the hot storage stabilities of the particle modified bituminous concretes of SBS with
And ageing-resistant performance.
Technical scheme：
A kind of stable storing, the ageing-resistant particle modified bituminous concretes of composite S BS, it is characterised in that by gather materials with it is compound
The particle modified pitches of SBS mix, wherein the modified pitch is 100 by mass ratio:2-30:It is 0.1-3 pitch, compound
SBS particles and stabilizer are mixed to prepare；The composite S BS particles include SBS, deep activation rubber powder, interfacial compatibilizer, its quality
Percentage is 15-38:56-82:3-6, wherein the deep activation rubber powder is 100 by mass ratio：3-20：0.3-4 scrap rubber
Powder, softening oil and activator are made by stirring extrusion.
The waste Crumb rubber is preferably made by the one or more in damaged tire, useless hand cart tyre, useless conveyer belt, scrap rubber footwear,
Particle size range is 0.1-10mm；Described to gather materials with the bitumen aggregate ratio of the particle modified pitches of composite S BS be preferably 5.0-5.2, is AC-13
Grading.
The softening oil is preferably one or more of mixing in pine tar, naphthenic oil, tall oil, aromatic naphtha, rosin
Thing.
The activator is preferably in phenyl disulfide, benzenethiol, polyalkylbenzene phenol disulphide, octadecylamine
One or several kinds of mixtures.
The preferable sol content of deep activation rubber powder is more than 80%, and Mooney viscosity is less than 1, and Sol molecular weight is more than 1
Ten thousand.
The SBS is preferably the hub-and-spoke configuration that molecular weight is 15-50 ten thousand and/or the linear structure that molecular weight is 5-25 ten thousand.
The interfacial compatibilizer be preferably Research of Grafting Malaic Anhydride Onto Polyethylene, ethylene-vinyl acetate copolymer, polyethylene,
One or more of mixtures in polypropylene, polyethylene glycol oxide.
A kind of above-mentioned stable storing, the preparation method of the ageing-resistant particle modified bituminous concretes of composite S BS, its feature
It is to comprise the following steps：
It will be added to after the rubber powder, softening oil, activator mixing, stirring in the first screw extruder, control temperature
For 100-380 DEG C, continuously extruded after clipped, reaction, obtain deep activation rubber powder；
The deep activation rubber powder and SBS and interfacial compatibilizer are added in the second screw extruder, control temperature exists
80-200 DEG C, extruded after well mixed, granulation obtains composite S BS particles；
Pitch is heated to 160-180 DEG C, stirring adds composite S BS particle heat-insulatings premix 5-100 minutes, then with shearing
1000-10000 revs/min of speed shearing 1-100 minutes, during add stabilizer；
With 100-500 revs/min of quick stirring insulation development 60-300 minute, modified pitch is prepared；
Modified pitch is added in gathering materials and modified asphalt concrete is made.
Preferable first screw extruder is double screw extruder, material pressure 2-20MPa, and screw speed is
10rpm-300rpm, reaction time 5-20min；Second screw extruder is single screw extrusion machine, screw speed 10-
200rpm, barrel pressure 2-20MPa；.
The preferable mixing, stirring are with 50-100 DEG C of pretreatment 10-30 minute in homogenizer.
The advantageous effects of the present invention：
(1) deep activation rubber powder is prepared using twin-screw, cost is cheap, can efficiently control traditional scrap rubber and regenerate
Caused waste water, waste gas etc. " secondary pollution " in journey, the scrap rubber environment-friendly type regeneration belonged to truly utilize；
(2) the deep activation rubber powder of high desulfurization degree, linear molecule content is high (being higher than 80%), and molecular weight is big, molecular structure
It is similar with SBS, with SBS through mixing, miscible granulation, SBS can be partly substituted, is mixed with pitch by shearing homogenizing, is formed and dripped
The stabilizing network structure of green grass or young crops-SBS- deep activation rubber powder types, it is preferably multiple in the case where SBS dosages are relatively low still to obtain effect
Close the particle modified pitches of SBS；
(3) the deep activation rubber powder of high desulfurization degree, the active site of backbone molecule disappear substantially, and ageing-resistant performance is more excellent
It is different, with SBS through mixing, miscible granulation, it can effectively delay the aging attenuation problem of SBS modified pitch, obtain high-temperature storage
The particle modified pitches of composite S BS of excellent in stability.
(4) incorporation of the deep activation rubber powder of high desulfurization degree, adds modified pitch and that gathers materials wraps up in attached ability, enhances
The interface binding power of asphalt and aggregate, then improve the water stabilizing of asphalt；Meanwhile a large amount of elastomeric materials are mixed
Enter, improve the low temperature flexibility and elasticity of asphalt material, then improve the fatigue performance of asphalt.
Brief description of the drawings
Fig. 1 is a kind of stable storage of the present invention, the preparation flow of the ageing-resistant particle modified bituminous concretes of composite S BS
Figure.
Embodiment
In order to which present disclosure is expressly understood, will be described in more detail by specific embodiments and the drawings.
Below by the comparative example 1,2 and SBS and the mixed and modified comparative example of common waste Crumb rubber by being modified using only SBS
3, the embodiment 1-6 with being modified according to flow chart shown in Fig. 1 is contrasted, and is shown with the composite S BS particles of the present invention
The obtained performance difference of bituminous concrete is modified with prior art.
Waste Crumb rubber is 1mm full tire meridian glue rubber powder in following comparative example and embodiment；Softening oil is pine tar；Activation
Agent is rubber activator 420；Interfacial compatibilizer is Research of Grafting Malaic Anhydride Onto Polyethylene；Stabilizer is using Cosan, zinc oxide, tristearin
Acid, TMTD compound stabilizer, its mass ratio are：Cosan 80wt%, zinc oxide 5wt%, stearic acid 10wt%,
TMTD5wt%；Matrix pitch is the one or more in asphalt, bitumen, coal tar pitch；Gather materials and refer to be applied to pitch
Rubble, crushing gravel, graded gravel and the slag of particle diameter more than more than 2.36mm in concrete namely asphalt etc..
Comparative example 1：
4.5%SBS (linear) is weighed by matrix pitch weight ratio to be added in matrix pitch and shear 5min, is subsequently agitated for
Add 0.4% stabilizer and bred at 170-175 DEG C 4 hours, conventional SBS modified asphalt, numbering 1# is made, and test it
Performance.
Comparative example 2：
4.0%SBS (linear) is weighed by matrix pitch weight ratio to be added in matrix pitch and shear 5min, is subsequently agitated for
Add 0.4% stabilizer and bred at 170-175 DEG C 4 hours, conventional SBS modified modified pitch, numbering 2# is made, and survey
Try its performance.
Comparative example 3：
4.0%SBS (linear) is weighed by matrix pitch weight ratio, 5% waste Crumb rubber (40 mesh) is added in matrix pitch
And 5min is sheared, it is subsequently agitated for the stabilizer of addition 0.4% and is bred at 170-175 DEG C 4 hours, is made conventional SBS modified
Pitch, numbering 3#, and test its performance.
Embodiment 1：
By rubber powder, softening oil, activator according to weight than 100：5：2 pre-process in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, control twin-screw difference zone temperatures are at 100-380 DEG C.Wherein, first paragraph：
150-200 DEG C, second segment：250-300℃；3rd section：300-350℃；4th section：300-350℃；5th section：150-200
DEG C, material pressure is controlled the rotating speed of screw rod in 100rpm in 10Mpa or so by adjusting suitable, left-hand thread element mixing pressurization
From die extrusion deep activation rubber powder behind left and right, clipped, reaction 10min or so.Then, deep activation rubber powder passes through connector
Metering enters the second screw extruder, while adjusts hopper feed speed according to SBS, deep activation rubber powder, interfacial compatibilizer
Weight ratio is 15：82：3 add SBS and interfacial compatibilizer, and control single-screw barrel temperature is at 120 DEG C or so, screw speed
100rpm, barrel pressure 10Mpa or so, uniformly mixing, extrusion, stable storing, ageing-resistant compound is prepared by water cooling granulation
SBS particles.By matrix pitch weight than weighing 10% stable storing, ageing-resistant composite S BS particles, it is added in matrix pitch
And 5min is sheared, it is subsequently agitated for the stabilizer of addition 0.4% and is bred at 170-175 DEG C 4 hours, composite S BS particles is made
Modified pitch, numbering 4#.
Embodiment 2：
By rubber powder, softening oil, activator according to weight than 100：10：1 pre-processes in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, from die extrusion deep activation rubber powder after clipped, reaction.Then, depth
Activated rubber powder enters the second screw extruder by connector metering, while adjusts hopper feed speed and lived according to SBS, depth
Change rubber powder, interfacial compatibilizer weight than 20:75:5 add SBS and interfacial compatibilizer, and uniformly mixing, extrusion, are granulated by water cooling
Prepare stable storing, ageing-resistant composite S BS particles.Each process parameter is substantially the same as embodiment 1.By matrix pitch weight ratio
10% stable storing, ageing-resistant composite S BS particles are weighed, is added in matrix pitch and shears 5min, be subsequently agitated for adding
0.4% stabilizer simultaneously breeds 4 hours at 170-175 DEG C, and the particle modified pitches of composite S BS, numbering 5# is made.
Embodiment 3：
By rubber powder, softening oil, activator according to weight than 100：15：3 pre-process in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, from die extrusion deep activation rubber powder after clipped, reaction.Then, depth
Activated rubber powder enters the second screw extruder by connector metering, while adjusts hopper feed speed and lived according to SBS, depth
Change rubber powder, interfacial compatibilizer weight than 28:68:4 add SBS and interfacial compatibilizer, and uniformly mixing, extrusion, are granulated by water cooling
Prepare stable storing, ageing-resistant composite S BS particles.Each process parameter is substantially the same as embodiment 1.By matrix pitch weight ratio
12% stable storing, ageing-resistant composite S BS particles are weighed, is added in matrix pitch and shears 5min, be subsequently agitated for adding
0.4% stabilizer simultaneously breeds 4 hours at 170-175 DEG C, and the particle modified pitches of composite S BS, numbering 6# is made.
Embodiment 4：
By rubber powder, softening oil, activator according to weight than 100：18：0.5 pre-processes in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, from die extrusion deep activation rubber powder after clipped, reaction.Then, depth
Activated rubber powder enters the second screw extruder by connector metering, while adjusts hopper feed speed and lived according to SBS, depth
Change rubber powder, interfacial compatibilizer weight than 32:63:5 add SBS and interfacial compatibilizer, and uniformly mixing, extrusion, are granulated by water cooling
Prepare stable storing, ageing-resistant composite S BS particles.Each process parameter is substantially the same as embodiment 1.By matrix pitch weight ratio
15% stable storing, ageing-resistant composite S BS particles are weighed, is added in matrix pitch and shears 5min, be subsequently agitated for adding
0.4% stabilizer simultaneously breeds 4 hours at 170-175 DEG C, and the particle modified pitches of composite S BS, numbering 7# is made.
Embodiment 5：
By rubber powder, softening oil, activator according to weight than 100：3：4 pre-process in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, from die extrusion deep activation rubber powder after clipped, reaction.Then, liquid
Reclaimed rubber enters the second screw extruder by connector metering, while adjusts hopper feed speed according to SBS, deep activation
Rubber powder, interfacial compatibilizer weight ratio：34:61:5 add SBS and interfacial compatibilizer, and uniformly mixing, extrusion, are granulated by water cooling and make
Standby stable storing, ageing-resistant composite S BS particles.Each process parameter is substantially the same as embodiment 1.By matrix pitch weight than claiming
20% stable storing, ageing-resistant composite S BS particles are taken, is added in matrix pitch and shears 5min, be subsequently agitated for adding
0.4% stabilizer simultaneously breeds 4 hours at 170-175 DEG C, and the particle modified pitches of composite S BS, numbering 8# is made.
Embodiment 6：
By rubber powder, softening oil, activator according to weight than 100：20：0.3 pre-processes in homogenizer at 70 DEG C
15min, the first screw extruder is dosed to, from die extrusion deep activation rubber powder after clipped, reaction.Then, depth
Activated rubber powder enters the second screw extruder by connector metering, while adjusts hopper feed speed and lived according to SBS, depth
Change rubber powder, interfacial compatibilizer weight than 38:56:6 add SBS and interfacial compatibilizer, and uniformly mixing, extrusion, are granulated by water cooling
Prepare stable storing, ageing-resistant composite S BS particles.Each process parameter is substantially the same as embodiment 1.By matrix pitch weight ratio
25% stable storing, ageing-resistant composite S BS particles are weighed, is added in matrix pitch and shears 5min, be subsequently agitated for adding
0.4% stabilizer simultaneously breeds 4 hours at 170-175 DEG C, and the particle modified pitches of composite S BS, numbering 9# is made.
Modified asphalt material made above is mixed to prepare to the modified asphalt concrete of AC-13 gradings with gathering materials respectively,
Tested by Marshall, high-temperature stability is tested, water stability is tested, crack resistance at low-temperature experiment and four-point bending fatigue try
Test, experimental result is as follows：
The modified asphalt concrete performance of table 1
The four-point bending fatigue test results of the modified asphalt concrete of table 2
The particle modified pitches of 4#, 5#, 6#, 7#, 8#, 9# composite S BS in embodiment 1-6 are can be seen that from table 2 and table 3
Bitumen aggregate ratio compared with 1#, 2#, 3# essentially unchangedization in comparative example 1,2,3.But 4#, 5#, 6#, 7#, 8#, 9# composite S BS particles
The water stability of modified asphalt concrete has larger improvement.The particle modified bituminous concretes of 7#, 9# composite S BS are common compared with 1# simultaneously
SBS modified asphalt concrete fatigue performances are more excellent.Therefore, the road of the particle modified bituminous concretes of composite S BS of the invention
Face performance is more preferably.
Described above is only the preferred embodiment of the present invention, using foregoing preferred processing condition, mass ratio and difference
Additive component carries out multigroup experiment, can obtain the result of above-mentioned improvement.It should be pointed out that for the general of the art
For logical technical staff, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of stable storing, the ageing-resistant particle modified bituminous concretes of composite S BS, it is characterised in that by gather materials with it is compound
The particle modified pitches of SBS mix, wherein the modified pitch is 100 by mass ratio:2-30:It is 0.1-3 pitch, compound
SBS particles and stabilizer are mixed to prepare；The composite S BS particles include SBS, deep activation rubber powder, interfacial compatibilizer, its quality
Percentage is 15-38:56-82:3-6, wherein the deep activation rubber powder is 100 by mass ratio：3-20：0.3-4 scrap rubber
Powder, softening oil and activator are made by stirring extrusion.
2. modified asphalt concrete according to claim 1, it is characterised in that the waste Crumb rubber is by damaged tire, useless conveying
One or more in band, scrap rubber footwear are made, particle size range 0.1-10mm；It is described to gather materials and the particle modified pitches of composite S BS
Bitumen aggregate ratio be 5.0-5.2, be AC-13 gradings.
3. modified asphalt concrete according to claim 1, it is characterised in that the softening oil be pine tar, naphthenic oil,
One or more of mixtures in aromatic naphtha, rosin.
4. modified asphalt concrete according to claim 1, it is characterised in that the activator is phenyl disulfide, benzene
One or several kinds of mixtures in thiophenol, polyalkylbenzene phenol disulphide, octadecylamine.
5. modified asphalt concrete according to claim 1, it is characterised in that the sol content of the deep activation rubber powder
More than 80%, Mooney viscosity is less than 1, and Sol molecular weight is more than 10,000.
6. modified asphalt concrete according to claim 1, it is characterised in that the SBS is that molecular weight is 15-50 ten thousand
Hub-and-spoke configuration and/or the linear structure that molecular weight is 5-25 ten thousand.
7. modified asphalt concrete according to claim 1, it is characterised in that the interfacial compatibilizer is polycthylene grafted
One or more of mixing in maleic anhydride, ethylene-vinyl acetate copolymer, polyethylene, polypropylene, polyethylene glycol oxide
Thing.
8. according to a kind of any described stable storings of claim 1-7, the ageing-resistant particle modified bituminous concretes of composite S BS
Preparation method, it is characterised in that comprise the following steps：
The rubber powder, softening oil, activator are mixed, be added to after stirring in the first screw extruder, controls the temperature to be
100-380 DEG C, continuously extruded after clipped, reaction, obtain deep activation rubber powder；
The deep activation rubber powder and SBS and interfacial compatibilizer are added in the second screw extruder, control temperature is in 80-
200 DEG C, extruded after well mixed, granulation obtains composite S BS particles；
Pitch is heated to 160-180 DEG C, stirring adds composite S BS particle heat-insulatings premix 5-100 minutes, then with shear rate
1000-10000 revs/min shearing 1-100 minutes, during add stabilizer；
With 100-500 revs/min of quick stirring insulation development 60-300 minute, modified pitch is prepared；
Modified pitch is added in gathering materials and modified asphalt concrete is made.
9. according to the method for claim 8, it is characterised in that first screw extruder is double screw extruder, material
Pressure is 2-20MPa, screw speed 10rpm-300rpm, reaction time 5-20min；Second screw extruder is single
Screw extruder, screw speed 10-200rpm, barrel pressure 2-20MPa.
10. according to the method for claim 8, it is characterised in that the mixing, stirring are with 50- in homogenizer
100 DEG C of pretreatment 10-30 minutes.
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| CN105887608B (en) * | 2016-04-01 | 2018-03-06 | 江苏东浦管桩有限公司 | Water Permeability Multi-purpose Concrete and component for sponge urban construction |
| CN110436827B (en) * | 2019-08-08 | 2021-11-30 | 辽宁新发展公路科技养护有限公司 | Method for preparing prefabricated pedestrian pavement brick by utilizing pavement milling and planing material regeneration of asphalt pavement |
| CN110436826B (en) * | 2019-08-08 | 2021-11-02 | 辽宁新发展公路科技养护有限公司 | Method for preparing prefabricated drainage ditch by utilizing asphalt pavement surface layer milling material regeneration |
| CN110616632A (en) * | 2019-09-25 | 2019-12-27 | 齐鲁交通发展集团有限公司青临分公司 | Concrete bridge deck waterproof bonding material and construction method |
| CN111995808A (en) * | 2020-08-05 | 2020-11-27 | 江苏中宏环保科技有限公司 | Instant high-adhesion golden asphalt modified material, preparation method and application |
| CN115678294B (en) * | 2021-07-27 | 2023-09-01 | 中国石油化工股份有限公司 | Anti-stripping agent and preparation method and application thereof |
| CN115974456A (en) * | 2022-03-29 | 2023-04-18 | 刘雪梅 | Preparation method of SBS modified asphalt concrete |
| CN115490917B (en) * | 2022-09-13 | 2023-08-29 | 山东大学 | Waste rubber powder dissociation reconstruction-gradient activation method and rubber powder-resin rubber plastic asphalt composite modifier |
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| CN101817946A (en) * | 2010-04-19 | 2010-09-01 | 交通部公路科学研究所 | Activated waste rubber powder and preparation method thereof as well as modified asphalt and preparation method thereof |
| CN102433007A (en) * | 2011-10-12 | 2012-05-02 | 中国石油化工股份有限公司 | Caulking asphalt for roads and bridges, and preparation method for caulking asphalt |
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| CN101817946A (en) * | 2010-04-19 | 2010-09-01 | 交通部公路科学研究所 | Activated waste rubber powder and preparation method thereof as well as modified asphalt and preparation method thereof |
| CN102993755A (en) * | 2011-09-14 | 2013-03-27 | 路翔股份有限公司 | Modified asphalt, its preparation method, and asphalt concrete |
| CN102433007A (en) * | 2011-10-12 | 2012-05-02 | 中国石油化工股份有限公司 | Caulking asphalt for roads and bridges, and preparation method for caulking asphalt |
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