CN105733275B - Rubber asphalt and preparation method thereof - Google Patents
Rubber asphalt and preparation method thereof Download PDFInfo
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- CN105733275B CN105733275B CN201410751712.7A CN201410751712A CN105733275B CN 105733275 B CN105733275 B CN 105733275B CN 201410751712 A CN201410751712 A CN 201410751712A CN 105733275 B CN105733275 B CN 105733275B
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- rubber
- asphalt
- rubber asphalt
- rubber powder
- pitch
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 226
- 239000010426 asphalt Substances 0.000 title claims abstract description 138
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 90
- 238000003756 stirring Methods 0.000 claims abstract description 33
- 239000002699 waste material Substances 0.000 claims abstract description 31
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000011159 matrix material Substances 0.000 claims abstract description 27
- 238000010008 shearing Methods 0.000 claims abstract description 21
- 230000003213 activating effect Effects 0.000 claims abstract description 17
- 239000000084 colloidal system Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 230000001172 regenerating effect Effects 0.000 claims description 16
- 239000012190 activator Substances 0.000 claims description 14
- XQVWYOYUZDUNRW-UHFFFAOYSA-N N-Phenyl-1-naphthylamine Chemical compound C=1C=CC2=CC=CC=C2C=1NC1=CC=CC=C1 XQVWYOYUZDUNRW-UHFFFAOYSA-N 0.000 claims description 6
- 239000007859 condensation product Substances 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 3
- 239000010920 waste tyre Substances 0.000 claims description 3
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- CMSNLOVMNRPLDK-UHFFFAOYSA-N C1(=CC=CC2=CC=CC=C12)N.C(C)=O Chemical group C1(=CC=CC2=CC=CC=C12)N.C(C)=O CMSNLOVMNRPLDK-UHFFFAOYSA-N 0.000 claims 1
- 238000003860 storage Methods 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 15
- 230000004913 activation Effects 0.000 abstract description 6
- 230000003712 anti-aging effect Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000012492 regenerant Substances 0.000 abstract 3
- 239000011295 pitch Substances 0.000 description 75
- 239000000047 product Substances 0.000 description 24
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- 230000032683 aging Effects 0.000 description 11
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- 238000010276 construction Methods 0.000 description 8
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- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
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- RUFPHBVGCFYCNW-UHFFFAOYSA-N 1-naphthylamine Chemical compound C1=CC=C2C(N)=CC=CC2=C1 RUFPHBVGCFYCNW-UHFFFAOYSA-N 0.000 description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 2
- LFQWWVLFISTXMR-UHFFFAOYSA-N 2,7-ditert-butyl-3,8-dithiatricyclo[5.1.0.02,4]oct-5-en-4-ol Chemical compound C(C)(C)(C)C12C(C=CC3(C1S3)C(C)(C)C)(O)S2 LFQWWVLFISTXMR-UHFFFAOYSA-N 0.000 description 2
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- 239000004902 Softening Agent Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
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- 150000003462 sulfoxides Chemical class 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- YHMYGUUIMTVXNW-UHFFFAOYSA-N 1,3-dihydrobenzimidazole-2-thione Chemical compound C1=CC=C2NC(S)=NC2=C1 YHMYGUUIMTVXNW-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- KEQFTVQCIQJIQW-UHFFFAOYSA-N N-Phenyl-2-naphthylamine Chemical compound C=1C=C2C=CC=CC2=CC=1NC1=CC=CC=C1 KEQFTVQCIQJIQW-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- GJEAMHAFPYZYDE-UHFFFAOYSA-N [C].[S] Chemical compound [C].[S] GJEAMHAFPYZYDE-UHFFFAOYSA-N 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- VCCBEIPGXKNHFW-UHFFFAOYSA-N biphenyl-4,4'-diol Chemical group C1=CC(O)=CC=C1C1=CC=C(O)C=C1 VCCBEIPGXKNHFW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
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- 230000029087 digestion Effects 0.000 description 1
- IMHDGJOMLMDPJN-UHFFFAOYSA-N dihydroxybiphenyl Natural products OC1=CC=CC=C1C1=CC=CC=C1O IMHDGJOMLMDPJN-UHFFFAOYSA-N 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 150000005002 naphthylamines Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- NCVCNEOCVSLHLC-UHFFFAOYSA-N para-tert. butyl phenol disulfide Chemical compound C12SC2(O)C=CC2(C(C)(C)C)C1S2 NCVCNEOCVSLHLC-UHFFFAOYSA-N 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011387 rubberized asphalt concrete Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002522 swelling effect Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- BPJYAXCTOHRFDQ-UHFFFAOYSA-L tetracopper;2,4,6-trioxido-1,3,5,2,4,6-trioxatriarsinane;diacetate Chemical compound [Cu+2].[Cu+2].[Cu+2].[Cu+2].CC([O-])=O.CC([O-])=O.[O-][As]1O[As]([O-])O[As]([O-])O1.[O-][As]1O[As]([O-])O[As]([O-])O1 BPJYAXCTOHRFDQ-UHFFFAOYSA-L 0.000 description 1
- 229920000428 triblock copolymer Polymers 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to rubber asphalt, which consists of matrix asphalt, waste rubber powder, an activating regenerant and a fixed anti-aging agent, wherein the components are respectively as follows by 100 percent of the total weight of the rubber asphalt: 70-89.4% of matrix asphalt; 10-29.4% of waste rubber powder; 0.1-1% of activating regenerant; 0.5-1.5% of fixed anti-aging agent. The preparation method comprises the following steps: heating the matrix asphalt to 120-160 ℃; slowly adding waste rubber powder and an activation regenerant into matrix asphalt according to a certain proportion in a reaction kettle, wherein the stirring speed is 300-1500 revolutions per minute, and the stirring time is 5-20 minutes; raising the temperature to 170-180 ℃, and shearing at high speed for 5-30 minutes by a shearing machine or a colloid mill, wherein the shearing speed is 3000-5000 r/min. Adding a fixed anti-aging agent, and reacting for 2-5 hours under a stirring state. The invention improves the compatibility of the rubber powder and the asphalt and solves the problem that the rubber asphalt is unstable during high-temperature storage.
Description
Technical field
The present invention relates to road-making material technical fields, specifically, being to be related to a kind of rubber asphalt and preparation method thereof.
Background technique
Pitch is a kind of important road and construction material.In recent years, the high speed development of social economy promotes traffic fortune
Defeated industry and each grade bitumen highway are rapidly promoted, and have thus driven the raising to Service Performance of Asphalt Pavement requirement.Plain asphalt
Road surface is big to the sensibility of temperature, there are it is fragile under low temperature split, high temperature easily softens, poor flexibility, bad ageing-resistant performance the disadvantages of,
It is difficult to meet requirement of the modern high-grade highway to high temperature performance, pitch must be modified thus.
So-called modified pitch, according to the definition of China " highway Construction of Modified Asphalt Pavement technical specification " (JTJ036-98),
Refer to and " adds the outer-penetrating agents (modifying agent) such as rubber, resin, high molecular polymer, levigate rubber powder or other fillers, or take
To measures such as pitch mild oxidation processing, the performance of pitch or asphalt is made to be improved and manufactured asphalt binder ",
Wherein again to add the application of high molecular polymer modifying agent and study the most extensive.Most high molecular polymers is applied at present
Modifying agent is thermoplastic elastomer (TPE) polystyrene-polybutadiene-polystyrene triblock copolymer (SBS), and modified effect is good,
Service Performance of Asphalt Pavement can be significantly improved, temperature sensitivity is reduced, improves elasticity, toughness, viscosity, high temperature Rut resistance is low
Warm cracking resistance, and ageing-resistant performance is good, but adds expensive SBS and the cost of modified pitch is obviously increased.
Rubber asphalt refers to that waste rubber tyre powder meets Specifications requirement with obtained from pitch by a certain percentage mix
Product, wherein the volume of waste rubber tyre powder is not less than 15% (inside mixing) or 17.6% (mixing outside), also known as asphalt rubber.Work as rubber powder
After mixing heated bitumen, rubber grain absorbs the oil in pitch and is swollen, using the stages such as high shear, development, rubber grain
Again there is certain viscosity, of a relatively loose flocculent structure is become by original tight structure, the swollen rubber after preparation
Grain is relatively evenly dispersed in suspension in pitch, and matrix pitch becomes sticky due to also oil is absorbed because of part.With modified rubber
Asphalt material not only maintains the main physical and mechanical preperties of pitch and restores the viscosity and plasticity of rubber material part raw rubber,
And be used for road engineering, high temperature performance, anti-aging property, the anti-fatigue performance of pitch can be improved, play thinned road surface,
Prolonging service life of pavement, mitigates the effects of driving noise at delayed reflex crack, has excellent winter flexible.
Foreign countries by damaged tire be applied to prepare rubber asphalt starting it is more early, China then in recent years for environmental protection, at
The factors such as this reduction and high performance just start the research and production of paying attention to rubber asphalt.The production work of rubber asphalt at present
Skill is usually that waste rubber tyre powder is carried out to high temperature swelling, physical shear, grinding and dispersion stirring in pitch.It is well known that being used for
The waste Crumb rubber of asphalt modification is the rubber through over cure.Vulcanization is one of the main processes of rubber product processing, and
The last one manufacturing procedure in rubber product production, could be obtained only after over cure more perfect physical mechanical property with
Chemical property.In Vulcanization Process of Rubber, linear macromolecule issues biochemical cross-linking reaction in physicochemical effect, forms three
Netted three-dimensional-structure is tieed up, the sizing material of plasticity is transformed into high elastic rubber, the performances such as physical mechanical, heat-resisting, solvent resistant improve.
But the formation of three-dimensional net structure, so that the light component in pitch cannot dissolve rubber powder, and can only lack after pitch is added in rubber powder
Amount swelling, the big group of its reactivity or atom have not existed rubber powder granule after curing, poor with pitch chemical interactions, add
Rubber powder and pitch in density, polarity, solubility parameter etc. there are bigger difference, cause its compatibility between pitch not
Well, unstable when high-temperature storage, rubber powder is also easy to produce precipitating.Therefore rubber asphalt production facility must be disposed in actual production
It at construction of the highway mixing station scene, is used in production, the mode of scene processing is difficult to the product quality of rubber asphalt
Detection control, and limitation of constructing is very big.
In the prior art in order to solve the above problem, increase the intermiscibility of rubber powder and pitch using a variety of methods:
1, using granularity is smaller or the waste Crumb rubber of specific shape, such as Chinese invention patent application CN1114258A is mentioned
Waste rubber tire fine strip shape or fine powder is whittled into out to be used in mixed way with pitch.It can be preferably dispersed in using the small rubber powder of granularity
In asphalt system, but the difficulty and cost of rubber powder crushing are on the one hand increased, rubber powder granule in another aspect rubber asphalt system
It is only physical mixed with matrix pitch, does not reach stable chemical colloform texture, thus making often goes out on road
Existing waste rubber tyre powder particle removing falls off, to influence the quality on road surface.This method is also only that production scene uses, and could not be solved
Actual problems of stability in storage.
It is sheared additionally by high temperature multistage to improve the mixed effect of rubber powder, such as Chinese invention patent application CN1834159A
" one kind is suitable for industrial rubber powder modified asphalt by " production equipment of appts of modified asphalt by utilizing waste tyre rubber powder " and CN1923902A
Preparation method " be using multistage shear at high temperature so that process is complicated, energy consumption height, the production cycle is long.
2, rubber powder desulfurization.Chinese invention patent CN1226351C discloses a kind of asphalt modified with desulfurized rubber powder, by desulfurization
Rubber powder, pitch and compatilizer are made in the 160-210 DEG C of grinding by high shear agitation or colloid mill.Rubber powder after desulfurization
There is preferable dissolution swellability in pitch, simultaneously because there is certain active group on desulfurization powder surface, is conducive to and pitch
Chemical action is generated, the storage stability of rubber asphalt is improved.But the invention is not to the source of desulfurization powder and desulfurization side
Method is explained, therefore is affected by raw material sources and desulfurization degree, and industrialized production is unfavorable for.
3, crumb rubber activation.Chinese invention patent application CN101817946A " activated waste rubber powder, preparation method and changes
Property pitch and preparation method thereof " is based on such a technology, discloses a kind of shoddy and activates and prepare modified pitch
Method.Activated waste rubber powder in the invention is by the mixture containing waste Crumb rubber, softening agent and/or rubber activator in 50-
It is kneaded 10-20 minutes and is made at a temperature of 100 DEG C, be then added to activated waste rubber powder in 100-220 DEG C of matrix pitch,
Through 30-90 minutes obtained modified pitch of high speed shear.Wherein softening agent plays swelling action to rubber, keeps three-dimensional net structure loose
Relax, increase the osmosis of oxygen, accelerate shoddy activation process, activator be then the vulcanized network of shoddy is opened, and
It generates free radicals under high temperature, is combined with the free radical in shoddy, is polymerize again after preventing rubber molecule from being broken.But this method
The net macromolecular structure of middle rubber powder is destroyed after oxidation, desulfurization occurs, and forms small-sized netted and linear chain structure, is inhaled
It receives in pitch and is dispersed in pitch after light component swelling with fine particle, although preferably improving storage stability, glue
Chemical action between powder particles, between rubber powder and matrix pitch is not strong, and does not form crosslinking after desulfurization again, and there are rubber
Problem of aging once again.
4, additive.Chinese invention patent application CN101747637A " a kind of low-temperature environment-friendly rubber asphalt and its preparation side
Method " mixes rubber powder and additive, carries out mixing plasticizing with screw extruder and is granulated, then plasticized granule is mixed with cross-linking reaction agent
It is added after conjunction at 140-170 DEG C of pitch and is mixed with rubber asphalt.The invention realizes rubber powder by rubber powder plasticizing extrusion process
Slight plasticizing, rubber powder issues the reduction of raw rubber powder particles, the disconnected sulphur of rubber powder in higher temperature (120-200 DEG C) under the action of additive
And plasticizing, so that vulcanized rubber powder activation degradation, increases the intermiscibility with pitch.But this method preparation process is complicated, needs pair
Rubber powder extruding pelletization, and operation temperature height again, needs the plurality of devices such as joint high-speed mixer, screw extruder to be given birth to
It produces.
Chinese invention patent application CN1441005A " asphalt modified with desulfurized rubber powder " discloses a kind of modified drip of desulfurization powder
Green production technology passes through grinding for high shear agitation or colloid mill by desulfurization powder, pitch and additive at relatively high temperatures
It grinds and is made, additive improves the compatibility of each component in rubber powder modified asphalt, but due to needing to take off rubber powder in advance
Then sulphuring treatment carries out asphalt modification, the higher cost of raw material by raw material of desulfurization powder again, and its additive used is handed over
It is limited to join effect.
Chinese invention patent application CN101870818A " a kind of durable rubber asphalt and preparation method thereof " is provided durable
Rubber asphalt by the way that the pitch is heated to 170-190 DEG C, according to a certain ratio be added rubber powder, activator (used oil, it is excellent
Select thermal finalization machine oil), it stirs evenly, temperature is kept to 170-200 DEG C, is sent after to storage with the overground 1-3 of high-speed shearing machine shearing
It deposits in tank, anti-agent (4,4- dimorpholinyl disulfide) of reverting is added and stirs evenly up to durable rubber asphalt, rubber asphalt obtained
Have the characteristics that anti-softening point decaying when high temperature storage, and feature low with oil mass, that crack resistance at low-temperature is good, but the temperature of its reaction
Up to 200 DEG C of degree be easy to cause rubber powder degradation and energy consumption big, although viscosity and softening point decline during high-temperature storage
Subtract slow, but whether has the phenomenon that upper lower leaf after not can guarantee long term storage, and storage time is limited.
The intermiscibility of above-described existing rubber asphalt production technology, generally existing rubber and pitch, dispersibility and steady
Qualitative question.Although being taken the problem of improving intermiscibility and stability down to a certain degree using the methods of crumb rubber activation, desulfurization
Obtained certain effect, but there are still complex process, the problems such as production cycle is long, and equipment investment is big, and rubber asphalt and common
Pitch is the same all to have that aging, the aging of pitch are the processes gradually occurred, and rate directly affects road surface
Service life, this is because pitch is during storage, transport, construction and use, due to being exposed in air for a long time, by
The effect of the natural conditions such as the environmental factor such as variation of sunlight, oxygen gas and water and temperature, occurs a series of physics and chemistry becomes
Change, mainly fragrant oil is reduced, and asphalitine increases, so that the colloform texture of pitch is changed, to occur old once again
Change problem, after influencing the pavement performance rubber powder desulfurization of pitch, activation, the active group regenerated brings aging once again and asks
Topic.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of cryogenic property, anti-aging is provided
Performance is good, the excellent rubber asphalt of high-temperature storage property, to be effectively improved the compatibility of waste Crumb rubber and pitch, increases scrap rubber
The dosage of powder, and delay the ageing process once again of rubber and pitch.
In order to achieve the above object, rubber asphalt provided by the invention, by matrix pitch, waste rubber powder, activating and regenerating
Agent and fixed antiager composition, wherein each component proportion based on rubber asphalt total weight 100% is respectively as follows:
Matrix pitch 70~89.4%；
Waste rubber powder 10~29.4%；
Activating and regenerating agent 0.1~1%；
Fixed antiager 0.5~1.5%.
Above-mentioned rubber asphalt, wherein each component proportion based on rubber asphalt total weight 100% is respectively as follows: matrix pitch
74~84.4%, waste rubber powder 15~25%, activating and regenerating agent is 0.1~1%, and fixed antiager is 0.5~1.5%.
Above-mentioned rubber asphalt, wherein the matrix pitch be crineous dissolve in benzene or carbon disulfide solvent solid,
Semisolid or sticky mass.
Above-mentioned rubber asphalt, wherein the matrix pitch is by high-molecular hydrocarbons and its non metallic derivatives
The mixture of composition.
Above-mentioned rubber asphalt, wherein the matrix pitch is 30~110dmm of needle penetration, 40 DEG C~62 DEG C of softening point
The composition of one or more of straight asphalt, oxidized asphalt, reconciliation pitch.
Above-mentioned rubber asphalt, wherein the waste rubber powder is levigate cotton-shaped for the waste tire prepared using normal temperature method
Rubber powder, technical indicator are as follows: moisture is less than 1%, and tenor is less than 0.1%, and fiber, dust content are less than 1.5%, fineness
For 20~120 mesh.
Above-mentioned rubber asphalt, wherein the fineness of the waste rubber powder is 40-80 mesh.
Above-mentioned rubber asphalt, wherein the activating and regenerating agent is activated again containing rubber activator class, disulfides
Raw one or more mixtures of agent or sulfoxide regeneration activator.
Above-mentioned rubber asphalt, wherein the rubber activator class includes rubber activator 450 and rubber activator 480.
Above-mentioned rubber asphalt, wherein the disulfides activating and regenerating agent includes dithio-xylene compound, positive 12
Mercaptan, phenol disulfide, alkyl phenol disulfide, 4- methylphenol disulphide, 4- t-butyl phenol disulphide, 4-
Benzene isopropyl-phenol disulphide, 2,4- di-tert-butylphenol disulphide.
Above-mentioned rubber asphalt, wherein the fixed antiager includes 6- ethyoxyl -2,2,4- trimethyl -1,2- dihydro
Change one or more mixtures of quinoline, phenols antiager, 4,4' dihydroxy diphenyl or 2-mercaptobenzimidazole.
Above-mentioned rubber asphalt, wherein the phenols antiager includes 2,6- di-tert-butyl-methylphenol, 2,2'- methylene
Base is bis- (4- methyl-6-tert-butylphenol).
Further, the present invention provides the preparation method of above-mentioned rubber asphalt, includes the following steps:
Matrix pitch is heated to T1 temperature, T1 is 120~160 DEG C；
Waste rubber powder and activating and regenerating agent are slowly added in matrix pitch by a certain percentage in a kettle, stirring turns
Speed is 300~1500 revs/min, mixing time 5~20 minutes；
Temperature is increased to T2, using cutter or colloid mill high speed shear 5~30 minutes, shearing rotating speed was 3000~5000
Rev/min, T2 is 170~180 DEG C；
Fixed antiager is added to react 2~5 hours under stirring.
The preparation method of above-mentioned rubber asphalt, wherein further comprise the steps of: the temperature in control shear history in T2 ± 3
℃。
Beneficial functional of the invention is:
(1) at a temperature of 120~160 DEG C rubber powder granule occurs for the waste Crumb rubber vulcanized under the action of activating and regenerating agent
Activation and Partial digestion, tridimensional network relaxation, bridge linking effect destroy, the active force between strand reduces, and is being added
To after matrix pitch, 170~180 DEG C are warming up to, rubber powder is further swollen by the light component in pitch, the rubber powder under shear action
Particle is fully dispersed in pitch, and original a large amount of three sulfide linkage, disulfide bond and sulphur carbon key etc. are cut off, and unfolds as line style plasticity knot
Structure, and generate certain active group.It is eventually adding fixed antiager, with the active group in rubber powder strand and matrix pitch
The rubber powder strand of line style is changed into reticular structure again, and graft crosslinking effect, rubber asphalt occurs with pitch by reaction
Colloidal dispersion chemical stabilization, dramatically increase its storage stability.On the other hand, due to the activity in rubber powder strand and pitch
Group is reacted away, therefore has excellent anti-aging property, can obviously inhibit the aging again of rubber powder.
(2) 180 DEG C of rotary viscosity values of rubber asphalt of the invention are positively retained at 2.0~5.0Pas, and mobility refers to
The nearly asphalt of tag splice, construction workability greatly enhance, and the implementation for adding waste rubber tyre powder for high proportion provides feasibility.
(3) there is good compatibility, in fixed age resister and work between waste Crumb rubber and matrix pitch of the invention
Under the synergistic effect for changing regenerative agent, be conducive to the formation of stable colloid system, compare for other rubber asphalts high-temperature behavior,
A grade is improved in terms of Modified bitumen and ageing resistance, is glued under the 160-170 DEG C of high-temperature storage up to one month
The trend continued to increase is spent, other indexs do not have relaxation phenomenon, more convenient construction, and the rubber-asphalt mixture designed
Pavement performance is good.
(4) use rubber asphalt simple production process, rationally, energy consumption it is lower.
(5) road construction work, the especially needs of high-grade highway engineering are able to satisfy.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Detailed description of the invention
Fig. 1 is the preparation flow figure of rubber asphalt of the invention.
Specific embodiment
Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments, to be further understood that
The purpose of the present invention, scheme and effect, but it is not intended as the limitation of scope of the appended claims of the present invention.
In conjunction with refering to fig. 1, as shown, the preparation flow of rubber asphalt of the invention are as follows:
Step S100: matrix pitch is heated to T1 temperature, T1 is 120~160 DEG C.
Step S200: waste rubber powder and activating and regenerating agent are slowly added to matrix pitch by a certain percentage in a kettle
In, speed of agitator is 300~1500 revs/min, mixing time 5~20 minutes.
Step 300: increasing temperature to T2, using cutter or colloid mill high speed shear 5~30 minutes, shearing rotating speed was
3000~5000 revs/min, T2 is 170~180 DEG C.In this step, need to control the temperature in shear history in T2 ± 3
℃。
Step S400: fixed antiager is added and is reacted 2~5 hours under stirring.
Introduction is compared to the prior art and the present invention below in conjunction with multiple embodiments.
Comparative example (not plus the preparation of the rubber asphalt of modifying agent)
No. 70 reconciliation pitches of rubber asphalt gross mass 80% are heated to 120 DEG C in heating mantle, in heating stirring
40 mesh damaged tire rubber powders of the total pitch 20% of rubber asphalt are added, revolving speed is 1500 revs/min, is stirred 15 minutes, mixed to be formed
Close uniform mixture.When temperature rises to 180 DEG C, high shear agitation is carried out 10 minutes with high-shearing dispersion emulsifying machine,
In (180 ± 3) DEG C, revolving speed is 3000 revs/min for temperature control in shear history, after be stirred with blender, be stirred to react
In (180 ± 3) DEG C, mixing time is 3 hours to get the rubber asphalt finished product for not adding agent for temperature control in the process.
Embodiment 1
By the mixture (weight ratio 3:7) of No. 30 straight asphaltes of rubber asphalt gross mass 78.4% and No. 90 reconciliation pitches
It is heated to 120 DEG C in heating mantle, 80 mesh damaged tire rubber powders and 0.1% of rubber asphalt gross mass 21% are added while stirring
N- dodecyl mereaptan, revolving speed are 1300 revs/min, are stirred 5 minutes, to form uniformly mixed mixture.180 are risen to temperature
DEG C when, carry out high shear agitation 15 minutes with high-shearing dispersion emulsifying machine, in shear history temperature control in (180 ± 3) DEG C,
Revolving speed is 3000 revs/min, rear 6- ethyoxyl -2,2 that rubber asphalt gross mass 0.5% is added, 4- trimethyl -1,2- dihydro
The mixture (ratio 1:1) of quinoline and aldol-alpha-naphthylamine is stirred with blender, temperature control during being stirred to react
For system in (180 ± 3) DEG C, mixing time is 3 hours to get rubber asphalt finished product.
Embodiment 2
No. 70 reconciliation pitches of rubber asphalt gross mass 75% are heated to 130 DEG C in heating mantle, are added while stirring
60 mesh damaged tire rubber powders of rubber asphalt gross mass 24% and 0.5% rubber activator 480, revolving speed be 1300 revs/min, stir
It mixes 10 minutes, to form uniformly mixed mixture.When temperature rises to 180 DEG C, height is carried out with high-shearing dispersion emulsifying machine
Fast shear agitation 10 minutes, in (180 ± 3) DEG C, revolving speed is 4000 revs/min for temperature control in shear history, and rubber is added afterwards
How the mixture (ratio 1:1) of amine condensation product and N- phenyl-α-naphthylamine is carried out the acetaldehyde-α of pitch gross mass 0.5% with blender
Stirring, in (180 ± 3) DEG C, mixing time is 3 hours to get rubber asphalt finished product for temperature control during being stirred to react.
Embodiment 3
No. 50 oxidized asphalts of rubber asphalt gross mass 75.5% are heated to 150 DEG C in heating mantle, while stirring plus
Enter the mixed of 60 mesh damaged tire rubber powders of rubber asphalt gross mass 23% and 0.5% dithio-xylene compound and phenol disulfide
It closes object (ratio 1:1), revolving speed is 1000 revs/min, is stirred 10 minutes, to form uniformly mixed mixture.Rise to temperature
When to 180 DEG C, carry out high shear agitation 15 minutes with high-shearing dispersion emulsifying machine, in shear history temperature control (180 ±
3) DEG C, revolving speed is 3000 revs/min, the rear acetaldehyde-α that rubber asphalt gross mass 1% is added how amine condensation product ' and N- phenyl-β-
The mixture (ratio 1:1) of naphthylamines is stirred with blender, and temperature control is in (180 ± 3) DEG C, stirring during being stirred to react
Time is 2 hours to get rubber asphalt finished product.
Embodiment 4
No. 90 reconciliation pitches of rubber asphalt gross mass 74.5% are heated to 120 DEG C in heating mantle, while stirring plus
Enter 40 mesh damaged tire rubber powders of rubber asphalt gross mass 23.5% and 1% two sulphur of 4- methylphenol disulphide and alkylphenol
The mixture (ratio 1:1) of compound, revolving speed are 1500 revs/min, are stirred 5 minutes, to form uniformly mixed mixture.To temperature
When degree rises to 180 DEG C, high shear agitation is carried out 15 minutes with high-shearing dispersion emulsifying machine, and temperature control exists in shear history
(180 ± 3) DEG C, revolving speed are 4000 revs/min, rear aldol-alpha-naphthylamine, the N- benzene that rubber asphalt gross mass 1% is added
Base-alpha-naphthylamine and 2,6- di-tert-butyl-methylphenol mixture (ratio 1:1:1) are stirred with blender, are stirred to react
In (180 ± 3) DEG C, mixing time is 4 hours to get rubber asphalt finished product for temperature control in the process.
Embodiment 5
No. 90 oxidized asphalts of rubber asphalt gross mass 77.8% are heated to 150 DEG C in heating mantle, while stirring plus
Entering 80 mesh damaged tire rubber powders of rubber asphalt gross mass 21% and 0.2% New Regenerated activator sulfoxide, revolving speed is 900 turns/
Minute, it stirs 5 minutes, to form uniformly mixed mixture.When temperature rises to 180 DEG C, high-shearing dispersion emulsifying machine is used
It carries out high shear agitation 5 minutes, in (180 ± 3) DEG C, revolving speed is 3000 revs/min, rear to be added for temperature control in shear history
The N- phenyl-α-naphthylamine and N- phenyl-N β '-cyclohexyl p-phenylenediamine mixture (ratio 1:1) of rubber asphalt gross mass 1%
It is stirred with blender, in (180 ± 3) DEG C, mixing time is 3 hours to get rubber for temperature control during being stirred to react
Pitch finished product.
Embodiment 6
No. 70 straight asphaltes of rubber asphalt gross mass 83.7% are heated to 130 DEG C in heating mantle, while stirring plus
Entering 40 mesh damaged tire rubber powders of rubber asphalt gross mass 15% and 0.8% rubber activator 480, revolving speed is 1500 revs/min,
Stirring 5 minutes, to form uniformly mixed mixture.When temperature rises to 180 DEG C, height is carried out with high-shearing dispersion emulsifying machine
Fast shear agitation 5 minutes, in (180 ± 3) DEG C, revolving speed is 5000 revs/min for temperature control in shear history, rear that rubber drip is added
The N- phenyl-β-naphthylamine of green gross mass 0.5% and N- phenyl-N β '-cyclohexyl p-phenylenediamine mixture (ratio 1:1) are with stirring
It mixes device to be stirred, in (180 ± 3) DEG C, mixing time is 5 hours to get rubber asphalt for temperature control during being stirred to react
Finished product.
Embodiment 7
By the mixture (weight ratio 3:7) of No. 30 oxidized asphalts of rubber asphalt gross mass 78% and No. 110 reconciliation pitches
It is heated to 130 DEG C in heating mantle, 60 mesh damaged tire rubber powders and 0.5% of rubber asphalt gross mass 20% are added while stirring
The mixture (ratio 1:1) of dithio-xylene compound and 4- benzene isopropyl-phenol disulphide, revolving speed are 800 revs/min, stirring
15 minutes, to form uniformly mixed mixture.When temperature rises to 180 DEG C, high speed is carried out with high-shearing dispersion emulsifying machine
Shear agitation 20 minutes, in (180 ± 3) DEG C, revolving speed was 5000 revs/min for temperature control in shear history, rear that rubber drip is added
2,6- di-tert-butyl-the methylphenol and 2,2' methylene bis (4- methyl-6-tert-butylphenol) of green gross mass 1.5% mix
It closes object (ratio 1:1) to be stirred with blender, temperature control is in (180 ± 3) DEG C, mixing time 4 during being stirred to react
Hour is to get rubber asphalt finished product.
Embodiment 8
No. 50 reconciliation pitches of rubber asphalt gross mass 78.5% are heated to 160 DEG C in heating mantle, while stirring plus
Enter 80 mesh damaged tire rubber powders of rubber asphalt gross mass 20% and 0.5% alkyl phenol disulfide and 4- benzene isopropyl-phenol
The mixture (ratio 1:1) of disulphide, revolving speed are 600 revs/min, are stirred 10 minutes, to form uniformly mixed mixture.
When temperature rises to 180 DEG C, high shear agitation is carried out 5 minutes with high-shearing dispersion emulsifying machine, temperature control in shear history
For system in (180 ± 3) DEG C, revolving speed is 3000 revs/min, rear 6- ethyoxyl -2,2 that rubber asphalt gross mass 1% is added, 4- front three
The stirring of the mixture (ratio 1:1) of base -1,2- dihyaroquinoline and 2,2' methylene bis (4- methyl-6-tert-butylphenol)
Device is stirred, during being stirred to react temperature control in (180 ± 3) DEG C, mixing time be 2 hours to get rubber asphalt at
Product.
Embodiment 9
No. 70 oxidized asphalts of rubber asphalt gross mass 74% are heated to 140 DEG C in heating mantle, are added while stirring
40 mesh damaged tire rubber powders of rubber asphalt gross mass 25% and 0.5% n- dodecyl mereaptan and 4- methylphenol disulphide it is mixed
It closes object (ratio 1:1), revolving speed is 1000 revs/min, is stirred 20 minutes, to form uniformly mixed mixture.Rise to temperature
When to 180 DEG C, carry out high shear agitation 10 minutes with high-shearing dispersion emulsifying machine, in shear history temperature control (180 ±
3) DEG C, revolving speed is 3000 revs/min, the rear acetaldehyde-α that rubber asphalt gross mass 0.5% is added how amine condensation product and 2,2'- methylene
The mixture (ratio 1:1) of base bis- (4- methyl-6-tert-butylphenols) is stirred with blender, temperature during being stirred to react
In (180 ± 3) DEG C, mixing time is 3 hours to get rubber asphalt finished product for control.
Embodiment 10
No. 70 reconciliation pitches of rubber asphalt gross mass 75% are heated to 140 DEG C in heating mantle, are added while stirring
80 mesh damaged tire rubber powders of rubber asphalt gross mass 24% and 0.5% 4- methylphenol disulphide and 4- t-butyl phenol two
The mixture (ratio 1:1) of sulfide, revolving speed are 1100 revs/min, are stirred 10 minutes, to form uniformly mixed mixture.
When temperature rises to 180 DEG C, high shear agitation is carried out 5 minutes with high-shearing dispersion emulsifying machine, temperature control in shear history
For system in (180 ± 3) DEG C, revolving speed is 3000 revs/min, the rear acetaldehyde-α that rubber asphalt gross mass 0.5% is added how amine condensation product
Methoxycyclohexyl-P-nethoxyaniline mixture (ratio 1:1) is stirred with blender with N- cyclohexyl-, is stirred
In (180 ± 3) DEG C, mixing time is 3 hours to get rubber asphalt finished product for temperature control in reaction process.
Embodiment 11
No. 70 straight asphaltes of rubber asphalt gross mass 74.5% are heated to 140 DEG C in heating mantle, while stirring plus
Enter 40 mesh damaged tire rubber powders of rubber asphalt gross mass 23.5% and 1% 2,4- di-tert-butylphenol disulphide and 4- spy's fourth
The mixture (ratio 1:1) of base phenol disulfide, revolving speed are 1200 revs/min, stir 10 minutes, are uniformly mixed with formation
Mixture.When temperature rises to 180 DEG C, high shear agitation is carried out 10 minutes with high-shearing dispersion emulsifying machine, shear history
In (180 ± 3) DEG C, revolving speed is 3000 revs/min for middle temperature control, the rear 3- hydroxybutyraldehyde-that rubber asphalt gross mass 1% is added
Alpha-naphthylamine and N- cyclohexyl-stir methoxycyclohexyl-P-nethoxyaniline mixture (ratio 1:1) with blender
It mixes, in (180 ± 3) DEG C, mixing time is 4 hours to get rubber asphalt finished product for temperature control during being stirred to react.
Embodiment 12
Reconcile pitches and No. 110 straight asphaltes for No. 30 of rubber asphalt gross mass 74.5% mixture (weight ratio 4:
6) it is heated to 140 DEG C in heating mantle, 40 mesh damaged tire rubber powders and 1% of rubber asphalt gross mass 23% are added while stirring
Rubber activator 480, revolving speed are 1500 revs/min, are stirred 5 minutes, to form uniformly mixed mixture.It is risen to temperature
At 180 DEG C, high shear agitation is carried out 5 minutes with high-shearing dispersion emulsifying machine, and temperature control is in (180 ± 3) in shear history
DEG C, revolving speed is 5000 revs/min, rear N- phenyl-N β '-cyclohexyl p-phenylenediamine and 4 that rubber asphalt gross mass 1.5% is added,
The mixture (ratio 1:1) of 4'- dihydroxybiphenyl is stirred with blender, during being stirred to react temperature control (180 ±
3) DEG C, mixing time is 4 hours to get rubber asphalt finished product.
Test result is as shown in table 1, the comparative example in addition to being not added with activating and regenerating agent and fixed antiager, the rubber of production
The needle penetration of pitch, softening point, rotary viscosity, elasticity recovery indices reach Ministry of Communications, and " rubber asphalt and mixture are set
Count construction technology guide " in rubber asphalt technical indicator, be demonstrated by splendid high temperature resistant storage and ageing-resistant performance.
The performance of the rubber asphalt of each embodiment of table 1
The fixed antiager of rubber asphalt of the invention and activating and regenerating agent have synergistic effect, during thermmal storage, no
The aging that rubber asphalt product can only be slowed down more can guarantee that rubber powder can be stably dispersed in pitch, do not degrade, thus
Guarantee the pavement performance of product.By comparative example and embodiment as it can be seen that under the synergistic effect of activator and fixed antiager, rubber
The indexs such as softening point, ductility and the viscosity of pitch improve a lot, and whole pavement performance significantly improves.
In order to which the beneficial effect to product of the present invention is verified, as shown in table 2, inventor chooses in construction and typically gives up
The rubber asphalt of tire rubber powder mixture proportion (volume 20%) is prepared for rubber asphalt product according to the proportion of embodiment 2, in 160-
170 DEG C of baking oven high temperature stores nearly one month, and softening point and viscosity do not have relaxation phenomenon.From table 2 it can also be seen that
160-170 DEG C of hot conditions, rubber asphalt of the invention can store 30 days, the indices attenuation degree very little of product,
And softening point and viscosity do not have significant change.
Performance under 2 rubber asphalt thermmal storage of table
Meanwhile it being dripped by the rubber of wheel tracking test, low temperature bend test and indirect tensile test on frozen-thaw to the proportion preparation of embodiment 2
Green product carries out mixture performance verifying, and test result is as shown in table 3.All technical is all satisfied that " asphalt highway is applied
Work technical specification " JTG F40-2004 technical requirement on design, and from table 3, it is apparent that the mixture of product of the present invention
Performance is very good, and high temperature Rut resistance dynamic stability has reached 7200 times/mm or more, significantly larger than the 3000 of index request
Secondary/mm；Low temperature flexural-tensile strain reaches 3300 μ ε or more, better than 2800 μ ε of index request；Freeze-thaw split tensile strength ratio reaches
83% or more, better than the 70% of index request.
3 mixture evaluation test of table
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present invention
Shape all should fall within the scope of protection of the appended claims of the present invention.
Claims (5)
1. a kind of rubber asphalt, which is characterized in that by matrix pitch, waste rubber powder, activating and regenerating agent and fixed antiager group
At, wherein each component proportion based on rubber asphalt total weight 100% is respectively as follows:
Matrix pitch 70~89.4%；
Waste rubber powder 10~29.4%；
Activating and regenerating agent 0.1~1%；
Fixed antiager 0.5~1.5%；
Wherein, the activating and regenerating agent is rubber activator 480；The fixed antiager is acetaldehyde-alpha-naphthylamine condensation product and N-
Phenyl-α-naphthylamine, the mass ratio of the two are 1:1；
Wherein, the matrix pitch be 30~110dmm of needle penetration, 40 DEG C~62 DEG C of softening point of straight asphalt, oxidized asphalt,
The composition of one or more of reconciliation pitch；The waste rubber powder is that the waste tire prepared using normal temperature method is ground
Thin cotton-shaped rubber powder, technical indicator are as follows: moisture less than 1%, tenor less than 0.1%, fiber, dust content less than 1.5%,
Fineness is 20~120 mesh.
2. rubber asphalt according to claim 1, which is characterized in that each component matches based on rubber asphalt total weight 100%
It is respectively as follows: matrix pitch 74~84.4%, waste rubber powder 15~25%, activating and regenerating agent is 0.1~1%, and fixed antiager is
0.5~1.5%.
3. rubber asphalt according to claim 1 or 2, which is characterized in that the fineness of the waste rubber powder is 40-80
Mesh.
4. the preparation method of rubber asphalt described in a kind of any one of claim 1-3, which is characterized in that including walking as follows
It is rapid:
Matrix pitch is heated to T1 temperature, T1 is 120~160 DEG C；
Waste rubber powder and activating and regenerating agent are slowly added in matrix pitch by a certain percentage in a kettle, speed of agitator is
300~1500 revs/min, mixing time 5~20 minutes；
Temperature is increased to T2, using cutter or colloid mill high speed shear 5~30 minutes, shearing rotating speed is 3000~5000 turns/
Minute, T2 is 170~180 DEG C；
Fixed antiager is added to react 2~5 hours under stirring.
5. the preparation method of rubber asphalt according to claim 4, which is characterized in that further comprise the steps of: control and sheared
Temperature in journey is in T2 ± 3 DEG C.
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| CN109206927A (en) * | 2017-06-30 | 2019-01-15 | 霍尼韦尔国际公司 | A kind of asphalt modification composite material and preparation method and application |
| CN108329704B (en) * | 2018-02-09 | 2020-10-23 | 山东星火科学技术研究院 | Durable rubber asphalt and preparation method thereof |
| CN113061288B (en) * | 2021-03-29 | 2023-03-17 | 广西交科集团有限公司 | Desulfurized rubber powder and preparation method thereof, and rubber asphalt composite material and preparation method thereof |
| CN115678295B (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 |
| CN116444994B (en) * | 2022-01-06 | 2024-10-01 | 中国石油化工股份有限公司 | Viscosity reducing material and preparation method and application thereof |
| CN114479496B (en) * | 2022-02-15 | 2023-03-31 | 天津城建大学 | Preparation method of desulfurized rubber modified asphalt |
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| CN1342726A (en) * | 2000-09-12 | 2002-04-03 | 攀钢集团煤化工公司 | Method for preparing modified coal tar pitch road building oil |
| CN102249599A (en) * | 2011-05-05 | 2011-11-23 | 刘廷国 | Method for preparing rubber asphalt by using discarding tire rubber block |
| CN103881405A (en) * | 2014-04-08 | 2014-06-25 | 王国清 | Waste rubber powder modified asphalt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1342726A (en) * | 2000-09-12 | 2002-04-03 | 攀钢集团煤化工公司 | Method for preparing modified coal tar pitch road building oil |
| CN102249599A (en) * | 2011-05-05 | 2011-11-23 | 刘廷国 | Method for preparing rubber asphalt by using discarding tire rubber block |
| CN103881405A (en) * | 2014-04-08 | 2014-06-25 | 王国清 | Waste rubber powder modified asphalt and preparation method thereof |
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