CN115029006A - Asphalt regenerant and preparation method and using method thereof - Google Patents
Asphalt regenerant and preparation method and using method thereof Download PDFInfo
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- CN115029006A CN115029006A CN202210731463.XA CN202210731463A CN115029006A CN 115029006 A CN115029006 A CN 115029006A CN 202210731463 A CN202210731463 A CN 202210731463A CN 115029006 A CN115029006 A CN 115029006A
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- asphalt
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- plasticizer
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- 239000012492 regenerant Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000839 emulsion Substances 0.000 claims abstract description 107
- 239000011347 resin Substances 0.000 claims abstract description 95
- 229920005989 resin Polymers 0.000 claims abstract description 95
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 87
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 87
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000004014 plasticizer Substances 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 31
- 238000004064 recycling Methods 0.000 claims abstract description 28
- 239000003921 oil Substances 0.000 claims abstract description 24
- 239000007800 oxidant agent Substances 0.000 claims abstract description 17
- 239000002199 base oil Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 11
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims abstract description 9
- 229920000728 polyester Polymers 0.000 claims abstract description 9
- 125000000524 functional group Chemical group 0.000 claims abstract description 7
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 6
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 33
- ZFOZVQLOBQUTQQ-UHFFFAOYSA-N Tributyl citrate Chemical compound CCCCOC(=O)CC(O)(C(=O)OCCCC)CC(=O)OCCCC ZFOZVQLOBQUTQQ-UHFFFAOYSA-N 0.000 claims description 30
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 28
- 238000010008 shearing Methods 0.000 claims description 24
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 15
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 15
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 7
- 229910017604 nitric acid Inorganic materials 0.000 claims description 7
- 239000012286 potassium permanganate Substances 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 claims description 3
- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 claims description 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 claims description 3
- 229920000903 polyhydroxyalkanoate Polymers 0.000 claims description 3
- 230000003716 rejuvenation Effects 0.000 claims description 3
- 239000001069 triethyl citrate Substances 0.000 claims description 3
- VMYFZRTXGLUXMZ-UHFFFAOYSA-N triethyl citrate Natural products CCOC(=O)C(O)(C(=O)OCC)C(=O)OCC VMYFZRTXGLUXMZ-UHFFFAOYSA-N 0.000 claims description 3
- 235000013769 triethyl citrate Nutrition 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 abstract description 8
- 238000011069 regeneration method Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- 235000019198 oils Nutrition 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 230000018109 developmental process Effects 0.000 description 7
- 238000004321 preservation Methods 0.000 description 7
- 239000011521 glass Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 235000015112 vegetable and seed oil Nutrition 0.000 description 3
- 239000008158 vegetable oil Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 235000019484 Rapeseed oil Nutrition 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002285 corn oil Substances 0.000 description 1
- 235000005687 corn oil Nutrition 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- -1 polyoxyethylene octyl phenol Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/11—Esters; Ether-esters of acyclic polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L93/00—Compositions of natural resins; Compositions of derivatives thereof
- C08L93/04—Rosin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09F—NATURAL RESINS; FRENCH POLISH; DRYING-OILS; OIL DRYING AGENTS, i.e. SICCATIVES; TURPENTINE
- C09F1/00—Obtaining purification, or chemical modification of natural resins, e.g. oleo-resins
- C09F1/04—Chemical modification, e.g. esterification
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- 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
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention discloses an asphalt regenerant, which comprises the following components: 50-70 parts by weight of base oil, 0.5-5 parts by weight of plasticizer and 10-20 parts by weight of tackifying resin; the base oil is light oil with aromatic hydrocarbon content of 60-70%; the plasticizer is at least one of a citrate plasticizer and a flexible polyester plasticizer; the tackifying resin is a modified rosin resin emulsion prepared by the following method: heating the rosin resin emulsion until the rosin resin emulsion is softened into a flowing state, then adding an oxidant into the rosin resin emulsion and reacting to obtain a mixed emulsion with an infrared spectrum C = O functional group index of 0.16-0.32, and finally adjusting the pH value of the mixed emulsion to 4.2-5.8 to obtain the modified rosin resin emulsion. The invention also discloses a preparation method and a use method of the asphalt recycling agent. Compared with the prior art, the asphalt regenerant disclosed by the invention has better regeneration performance and stronger applicability, and can effectively recover the cohesive force of asphalt materials, especially high-viscosity asphalt.
Description
Technical Field
The invention relates to the technical field of asphalt regeneration, in particular to an asphalt regenerant capable of effectively recovering asphalt binding power and a preparation method thereof.
Background
Due to good drainage performance, safety, driving comfort and the like, the drainage asphalt pavement is more and more widely applied to the road industry. Due to the special framework-gap structure of the drainage pavement, the bonding force of the high-viscosity asphalt cement is reduced under the action of environmental factors such as temperature, rain, snow, ultraviolet rays and the like, and diseases such as stripping, scattering, pit and the like are generated, so that the pavement performance is reduced.
The rejuvenation of bitumen is the reverse of aging, which is generally performed by the addition of rejuvenating agents. The compatibility of the four components of the asphalt is improved by adding a regenerant (the main component is low-viscosity oil), redundant asphaltene is dissolved and dispersed, and the penetration and ductility of the asphalt are improved, so that the asphalt is recovered and close to the original performance.
For example, chinese patent application CN201911321455.2 discloses an aged asphalt recycling agent and a preparation method thereof, wherein the aged asphalt recycling agent comprises 20 to 50 parts of vegetable oil, 0.5 to 4 parts of plasticizer, 0.5 to 8 parts of surfactant and 0.5 to 8 parts of antioxidant, the surfactant is polyoxyethylene octyl phenol ether-10, the antioxidant is zinc dialkyl dithiophosphate, the vegetable oil is one or more selected from corn oil, soybean oil, peanut oil, rapeseed oil, castor oil and linseed oil, and the plasticizer is epoxidized vegetable oil. The aging asphalt regenerant mainly aims at the regeneration of matrix asphalt, and the using condition of the regenerant is limited with the application of more and more modified asphalt. For another example, patent CN106497097B discloses a method for preparing a synergistic asphalt recycling agent, which comprises extracting light oil, modifying rubber powder, and mixing the obtained concentrated light oil, rubber powder, SBS, anti-aging agent, and anti-aging agent to prepare the synergistic asphalt recycling agent. Although the invention can improve the aging resistance, high temperature and viscoelasticity of asphalt, the formula of the regenerant contains rubber powder, which can generate larger pungent smell and pollute the environment in the using process, in addition, SBS is expensive, accounts for a higher proportion in the formula, and the cost of the regenerant is high.
CN201410828996.5 is a reactive waste SBS modified asphalt regenerant and a preparation method thereof, and the component regulator, the structure repair agent, the plasticizer and the retarder are adopted to improve the high-low temperature and fatigue performance of the waste SBS modified asphalt. The structure repairing agent is adopted to react with the aged asphalt, side reaction exists in the process, the product conversion efficiency is low, the use cost is increased, and meanwhile, due to the aging complexity of the modified asphalt, the product of the side reaction may influence the performance of the modified asphalt.
In conclusion, the problems of poor applicability and insufficient regeneration performance generally exist in the existing asphalt regeneration technology; more importantly, the existing asphalt recycling technology can not effectively recover the cohesive force of asphalt materials, particularly high-viscosity asphalt, and can not meet the requirement of recycling the cohesive force of the high-viscosity asphalt used in the drainage asphalt pavement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an asphalt regenerant which has better regenerability and stronger applicability and can effectively recover the cohesive force of asphalt materials, particularly high-viscosity asphalt.
The invention specifically adopts the following technical scheme to solve the technical problems:
an asphalt recycling agent comprising: 50-70 parts by weight of base oil, 0.5-5 parts by weight of plasticizer and 10-20 parts by weight of tackifying resin; the base oil is light oil with aromatic hydrocarbon content of 60-70%; the plasticizer is at least one of a citrate plasticizer and a flexible polyester plasticizer; the tackifying resin is a modified rosin resin emulsion prepared by the following method: heating the rosin resin emulsion until the rosin resin emulsion is softened into a flowing state, then adding an oxidant into the rosin resin emulsion and reacting to obtain a mixed emulsion with an infrared spectrum C-O functional group index of 0.16-0.32, and finally adjusting the pH value of the mixed emulsion to 4.2-5.8 to obtain the modified rosin resin emulsion.
Preferably, the citrate plasticizer is at least one of tributyl citrate, triethyl citrate and acetyl tributyl citrate.
Preferably, the flexible polyester plasticizer is at least one of polyhydroxyalkanoate and polydiethylene glycol adipate.
Preferably, the base oil is a furfural extract oil.
Preferably, the oxidant is one of an acidic potassium permanganate solution and concentrated nitric acid.
Preferably, the rosin resin emulsion is reacted after the addition of the oxidizing agent by: reacting for 30min at 75-80 ℃, and standing and reacting for 1-2 h at room temperature.
Further, the asphalt recycling agent also comprises: 0.5-5 parts by weight of an antioxidant.
Preferably, the antioxidant is 2, 6-di-tert-butyl-p-cresol.
The preparation method of the asphalt recycling agent in any technical scheme comprises the following steps: mixing and preheating the components except the modified rosin resin emulsion to 130-140 ℃, placing the mixture into a shearing machine for shearing for 0.5-1 h after preliminary stirring, wherein the shearing temperature is 140-160 ℃, the shearing rate is 4000 plus 5000r/min, and after the preliminary stirring, carrying out heat preservation development for 2h at 160-180 ℃ to obtain a dissolving solution; and then uniformly mixing the modified rosin resin emulsion and the dissolved liquid.
According to the using method of the asphalt regenerant in any technical scheme, the asphalt regenerant is added into aged asphalt according to the addition amount of 2-8%.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention takes light oil with aromatic hydrocarbon content of 60-70% as base oil component, and takes citrate plasticizer and/or flexible polyester plasticizer as plasticizer, the mutual solubility of the two base components is strong, and the compatibility to other components is strong, the high temperature performance and the low temperature performance of the regenerated asphalt can be considered, and a good base configuration is provided for the regenerant for recovering the bonding force of the asphalt; on the basis, the special modified rosin resin emulsion is used for tackifying, the rosin resin emulsion is modified by an oxidant, unstable C (C) in the molecular formula of the rosin resin emulsion can be oxidized into carboxyl, the pH value of the solution is controlled to ensure the stability of the carboxyl, and the carboxyl active group contained in the modified rosin resin greatly improves the binding power between the modified asphalt and aggregate. The asphalt regenerated by the regenerant is stable and uniform, the adhesion force between the asphalt and stone can be restored to be close to a normal level, and meanwhile, the modified rosin emulsion can prevent raw materials from agglomerating, so that the promotion effect of the regenerant on the adhesion force restoration of waste high-viscosity asphalt is exerted to the maximum extent.
The plasticizer used in the invention has the characteristics of good high-low temperature performance, no need of heating and mixing and the like, and the use of the plasticizer in the preparation of the regenerant can ensure that the prepared asphalt regenerant has good effect of adjusting asphalt viscosity and ductility, thereby being beneficial to ensuring that the prepared regenerated asphalt has good ductility; in addition, the plasticizer is biodegradable as an environment-friendly plasticizer, and the environment is greatly protected.
Drawings
FIG. 1 is an infrared spectrum of the modified rosin resin emulsions of examples 1 to 6.
Detailed Description
Aiming at the defects of the prior art, the solution idea of the invention is to take light oil with 60-70% of aromatic hydrocarbon content as base oil component, take citrate plasticizer and/or flexible polyester plasticizer as plasticizer, and add special modified rosin resin emulsion as tackifying resin, so as to greatly improve the regeneration performance of asphalt regenerant, especially the regeneration performance of asphalt bond force.
The asphalt regenerant provided by the invention comprises the following components: 50-70 parts by weight of base oil, 0.5-5 parts by weight of plasticizer and 10-20 parts by weight of tackifying resin; the base oil is light oil with aromatic hydrocarbon content of 60-70%; the plasticizer is at least one of a citrate plasticizer and a flexible polyester plasticizer; the tackifying resin is a modified rosin resin emulsion prepared by the following method: heating the rosin resin emulsion until the rosin resin emulsion is softened into a flowing state, then adding an oxidant into the rosin resin emulsion to react to obtain a mixed emulsion with an infrared spectrum C ═ O functional group index of 0.16-0.32, and finally adjusting the pH value of the mixed emulsion to be 4.2-5.8 to obtain the modified rosin resin emulsion.
Preferably, the citrate plasticizer is at least one of tributyl citrate, triethyl citrate and acetyl tri-n-butyl citrate.
Preferably, the flexible polyester plasticizer is at least one of polyhydroxyalkanoate and polydiethylene glycol adipate.
Preferably, the base oil is a furfural extract oil.
The oxidant can be various existing oxidants flexibly selected according to actual conditions, the conditions of the oxidation reaction can also be flexibly set according to the specific oxidant, and only the oxidant can react with the rosin resin emulsion to obtain the mixed emulsion with the infrared spectrum C ═ O functional group index of 0.16-0.32; preferably, the oxidizing agent is one of an acidic potassium permanganate solution, concentrated nitric acid and a hydrogen peroxide solution.
Preferably, the rosin resin emulsion is reacted after the addition of the oxidizing agent by: reacting for 30min at 75-80 ℃, and standing and reacting for 1-2 h at room temperature.
In order to improve the performance stability of the asphalt recycling agent of the invention during long-term storage, further, the asphalt recycling agent further comprises: 0.5-5 parts by weight of an antioxidant.
Preferably, the antioxidant is 2, 6-di-tert-butyl-p-cresol.
The preparation method of the asphalt recycling agent in any technical scheme comprises the following steps: mixing and preheating the other components except the modified rosin resin emulsion to 130-140 ℃, placing the mixture into a shearing machine for shearing for 0.5-1 h after preliminary stirring, wherein the shearing temperature is 140-160 ℃, the shearing rate is 4000-; then the modified rosin resin emulsion and the dissolved liquid are mixed evenly.
For the public understanding, the technical scheme of the invention is explained in detail by the following specific embodiments:
example 1:
the asphalt regenerant of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 10 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at 110 ℃ until the rosin resin emulsion is softened into a flowing state, and mixing the acidic potassium permanganate solution with the rosin resin emulsion according to the ratio of 1: 8, stirring and reacting at 75 ℃ for 30min, standing and reacting at room temperature for 2h to obtain a mixed emulsion, titrating a NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring by using a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then carrying out heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) and mixing the modified rosin resin emulsion and the dissolving solution, and fully and uniformly stirring.
Example 2:
the asphalt recycling agent of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 15 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at 110 ℃ until the rosin resin emulsion is softened into a flowing state, mixing the acidic potassium permanganate solution with the rosin resin emulsion according to the weight ratio of 1: 8, stirring and reacting at 75 ℃ for 30min, standing and reacting at room temperature for 2h to obtain a mixed emulsion, titrating a NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring by using a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then carrying out heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) mixing the modified rosin resin emulsion and the dissolving solution according to the proportion of 1: 4, and fully and uniformly stirring.
Example 3:
the asphalt recycling agent of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 20 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at 110 ℃ until the rosin resin emulsion is softened into a flowing state, mixing the acidic potassium permanganate solution with the rosin resin emulsion according to the weight ratio of 1: 8, stirring and reacting at 75 ℃ for 30min, standing and reacting at room temperature for 2h to obtain a mixed emulsion, titrating a NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring by using a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then carrying out heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) and mixing the modified rosin resin emulsion and the dissolving solution, and fully and uniformly stirring.
Example 4:
the asphalt viscosity regenerant of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 10 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at the temperature of 110 ℃ until the rosin resin emulsion is softened into a flowing state, mixing concentrated nitric acid and the rosin resin emulsion according to the weight ratio of 1: 6, stirring and reacting for 30min at 75 ℃, standing and reacting for 2h at room temperature to obtain a mixed emulsion, titrating NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring with a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then performing heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) and mixing the modified rosin resin emulsion and the dissolving solution, and fully and uniformly stirring.
Example 5:
the asphalt recycling agent of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 15 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at the temperature of 110 ℃ until the rosin resin emulsion is softened into a flowing state, mixing concentrated nitric acid and the rosin resin emulsion according to the weight ratio of 1: 6, stirring and reacting for 30min at 75 ℃, standing and reacting for 2h at room temperature to obtain a mixed emulsion, titrating NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring by using a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then carrying out heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) and mixing the modified rosin resin emulsion and the dissolving solution, and fully and uniformly stirring.
Example 6:
the asphalt recycling agent of the embodiment has the following formula in parts by weight:
70 parts of furfural extract oil, 20 parts of modified rosin resin emulsion, 5 parts of tributyl citrate and 5 parts of 2, 6-di-tert-butyl-p-cresol.
The preparation method comprises the following steps:
(1) preparing modified rosin resin emulsion: pouring the rosin resin emulsion into a beaker, heating at 110 ℃ until the rosin resin emulsion is softened into a flowing state, and mixing concentrated nitric acid and the rosin resin emulsion according to the proportion of 1: 6, stirring and reacting for 30min at 75 ℃, standing and reacting for 2h at room temperature to obtain a mixed emulsion, titrating NaOH solution into the mixed emulsion, and adjusting the pH value to 5.0 to obtain a modified rosin resin emulsion;
(2) mixing furfural extract oil, tributyl citrate and 2, 6-di-tert-butyl-p-cresol, preheating to 140 ℃, primarily stirring by using a glass rod, shearing and stirring for 50min at the rotation speed of 4000r/min and the temperature of 160 ℃ by using a high-speed shearing machine, and then carrying out heat preservation development for 2h at 140 ℃ to obtain a solution;
(3) and mixing the modified rosin resin emulsion and the dissolving solution, and fully and uniformly stirring.
The infrared spectrogram of the modified rosin resin emulsion in examples 1 to 6 is shown in fig. 1, and the index of the obtained C ═ O functional group is shown in table 1.
Table 1: the modified rosin resin emulsions of examples 1 to 6 had C ═ O functional group indices
The asphalt regenerant of the invention is used for recovering the performance of aged asphalt, and the addition amount of the asphalt regenerant is 2-8%. To verify the asphalt recycling performance of the present invention, the asphalt recycling agents prepared in examples 1 to 6 were added to the aged high-viscosity modified asphalt at a ratio of 4%, and the penetration (25 ℃), softening point, ductility (5 ℃) and pull strength were measured according to T361-16 (15) in the AASHTO standard, and if the results are shown in table 2:
table 2: examples 1 to 6 asphalt recycling agent regeneration Performance
The examples 1 to 3 are rosin resin emulsions modified by using acidic potassium permanganate as an oxidant, and the examples 4 to 6 are rosin resin emulsions modified by using concentrated nitric acid as an oxidant, and it can be seen from table 2 that the penetration, ductility and adhesion of the aged high-viscosity asphalt are effectively improved and the softening point is reduced to a certain extent after the rosin resin emulsions modified by the two methods are added. In conclusion, the asphalt regenerant disclosed by the invention has a good recovery effect on aged high-viscosity modified asphalt, and can basically recover to the index requirement of new high-viscosity modified asphalt.
For different mixing amounts of the modified rosin resin emulsion, the detection result of the 15% mixing amount is more improved than that of the 10% mixing amount, but the detection result of the 20% mixing amount is close to that of the 15% mixing amount by continuously increasing the modified rosin resin emulsion. With the increase of the mixing amount of the modified rosin resin emulsion, the performance of the regenerated high-viscosity modified asphalt is further recovered, but the performance is not greatly influenced by the increase of the mixing amount after the mixing amount reaches 15 percent.
Claims (10)
1. An asphalt recycling agent, comprising: 50-70 parts by weight of base oil, 0.5-5 parts by weight of plasticizer and 10-20 parts by weight of tackifying resin; the base oil is light oil with aromatic hydrocarbon content of 60-70%; the plasticizer is at least one of a citrate plasticizer and a flexible polyester plasticizer; the tackifying resin is a modified rosin resin emulsion prepared by the following method: heating the rosin resin emulsion until the rosin resin emulsion is softened into a flowing state, then adding an oxidant into the rosin resin emulsion and reacting to obtain a mixed emulsion with an infrared spectrum C = O functional group index of 0.16-0.32, and finally adjusting the pH value of the mixed emulsion to 4.2-5.8 to obtain the modified rosin resin emulsion.
2. The asphalt regenerant of claim 1, wherein the citrate-based plasticizer is at least one of tributyl citrate, triethyl citrate, acetyl tri-n-butyl citrate.
3. The asphalt recycling agent according to claim 1, wherein the flexible polyester-based plasticizer is at least one of a polyhydroxyalkanoate and a polydiethylene glycol adipate.
4. The asphalt rejuvenating agent according to claim 1 wherein said base oil is a furfural extract oil.
5. The asphalt regenerant of claim 1, wherein the oxidizing agent is one of an acidic potassium permanganate solution and a concentrated nitric acid solution.
6. The asphalt recycling agent according to claim 1, wherein the rosin resin emulsion is reacted by adding an oxidizing agent thereto under the following conditions: reacting for 30min at 75-80 ℃, and standing and reacting for 1-2 h at room temperature.
7. The asphalt recycling agent according to any one of claims 1 to 6, further comprising: 0.5-5 parts by weight of an antioxidant.
8. The asphalt recycling agent according to claim 7, wherein the antioxidant is 2, 6-di-tert-butyl-p-cresol.
9. The method for preparing the asphalt recycling agent according to any one of claims 1 to 8, comprising the steps of: mixing and preheating the other components except the modified rosin resin emulsion to 130-140 ℃, placing the mixture into a shearing machine for shearing for 0.5-1 h after preliminary stirring, wherein the shearing temperature is 140-160 ℃, the shearing rate is 4000-; and then uniformly mixing the modified rosin resin emulsion and the dissolved liquid.
10. The use method of the asphalt recycling agent according to any one of claims 1 to 8, wherein the asphalt recycling agent is added to aged asphalt in an amount of 2% to 8%.
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