CN115386235B - Preparation method and application of high-viscosity asphalt modifier - Google Patents
Preparation method and application of high-viscosity asphalt modifier Download PDFInfo
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- CN115386235B CN115386235B CN202210035543.1A CN202210035543A CN115386235B CN 115386235 B CN115386235 B CN 115386235B CN 202210035543 A CN202210035543 A CN 202210035543A CN 115386235 B CN115386235 B CN 115386235B
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- 239000010426 asphalt Substances 0.000 title claims abstract description 78
- 239000003607 modifier Substances 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 26
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 26
- 229920005594 polymer fiber Polymers 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 15
- 239000003208 petroleum Substances 0.000 claims description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- 239000011593 sulfur Substances 0.000 claims description 14
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 claims description 13
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 12
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 10
- 229920000728 polyester Polymers 0.000 claims description 10
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 150000003751 zinc Chemical class 0.000 claims description 7
- 239000006184 cosolvent Substances 0.000 abstract description 7
- 239000003381 stabilizer Substances 0.000 abstract description 7
- 239000007822 coupling agent Substances 0.000 abstract description 6
- 239000003431 cross linking reagent Substances 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 6
- -1 polypropylene Polymers 0.000 description 5
- 239000006087 Silane Coupling Agent Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical group C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001021 polysulfide Polymers 0.000 description 2
- 239000005077 polysulfide Substances 0.000 description 2
- 150000008117 polysulfides Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 150000001923 cyclic compounds Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 150000004659 dithiocarbamates Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229940016373 potassium polysulfide Drugs 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 150000003557 thiazoles Chemical class 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- PGNWIWKMXVDXHP-UHFFFAOYSA-L zinc;1,3-benzothiazole-2-thiolate Chemical compound [Zn+2].C1=CC=C2SC([S-])=NC2=C1.C1=CC=C2SC([S-])=NC2=C1 PGNWIWKMXVDXHP-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- 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
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a high-viscosity asphalt modifier and a preparation method thereof, wherein the asphalt modifier comprises the following raw materials in parts by weight: 20-30 parts of SBS, 15-20 parts of fiber, 1-10 parts of cosolvent, 1-3 parts of cross-linking agent, 1-2 parts of accelerator, 1-3 parts of stabilizer and 1-2 parts of coupling agent; the preparation method comprises the steps of firstly mixing SBS and a cosolvent, and further mixing fiber, a cross-linking agent, an accelerator, a stabilizer and a coupling agent to form an asphalt modifier; its advantages are simple preparing process, high viscosity, and high cracking and water-proof performance.
Description
Technical Field
The invention relates to the technical field of modified asphalt preparation (C08L 95/00), in particular to a preparation method and application of a high-viscosity asphalt modifier.
Background
With the increasing number and frequency of vehicles traveling on roadways, and severe high and low temperature weather, there are significant challenges presented to modern roads and roadways. The asphalt material is the most widely applied asphalt material in the highway, but the traditional petroleum asphalt is used as a pavement structural material, so that phenomena such as rutting, cracks and the like appear on the pavement, the safety and comfort of driving are not facilitated, and the cost for repairing the road frequently is increased.
At present, SBS modified asphalt gradually replaces traditional asphalt. SBS modified asphalt is divided into a wet process and a dry process, and compared with the wet process, the dry process omits the steps of grinding and storing in factories and is more convenient. However, the modifier prepared by the dry process has the problems of low compatibility with asphalt and poor cracking resistance.
The patent (CN 201010179374.6) provides a high-viscosity asphalt modifier, which enables SBS to be grafted and modified under the action of a chemical grafting agent and an accelerator, thereby achieving good compatibility between SBS and asphalt and being easy to blend. Patent (CN 201510608456.0) discloses an SBS modified asphalt which is chemically stable, has good high temperature performance and rut resistance, and has excellent thermal stability, and a preparation method thereof. However, no report has been made on a solution to the problem of cracking resistance and increase in water repellency.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides a high viscosity asphalt modifier, which is prepared from the following raw materials: 20-30 parts of SBS, 15-20 parts of fiber, 1-10 parts of cosolvent, 1-3 parts of cross-linking agent, 1-2 parts of accelerator, 1-3 parts of stabilizer and 1-2 parts of coupling agent.
As a preferable technical scheme, the SBS is at least one of linear SBS and star SBS;
further, the linear SBS is at least one of YH-791 linear SBS, YH-792 linear SBS and YH-796 linear SBS;
further, the star SBS is at least one of YH-4303 star SBS, YH-815 star SBS and YH-803 star SBS;
as a preferable technical scheme, the fiber is at least one of polymer fiber and lignin fiber;
further, the fibers are preferably polymeric fibers;
further, the polymer fiber is at least one of polypropylene fiber, polyacrylonitrile fiber, polyvinyl alcohol fiber, polyamide fiber and polyester fiber;
further, the polymer fibers are preferably polyacrylonitrile fibers and polyester fibers.
As a preferable technical scheme, the cosolvent is at least one of aromatic hydrocarbon oil, naphthenic base rubber oil and ethylene-vinyl acetate copolymer;
further, the cosolvent is preferably ethylene-vinyl acetate copolymer;
further, the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 28-33%;
further, the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is preferably 30%.
As a preferable technical scheme, the cross-linking agent is at least one of sulfur, a sulfur compound and triallyl isocyanurate.
As a preferable technical scheme, the accelerator is at least one of thiazoles, thiurams, sulfenamides, dithiocarbamates, aldamines, metal oxides and fatty acids;
further, the accelerator is preferably thiazole and sulfenamide;
further, the thiazole is preferably a zinc salt of 2-mercaptobenzothiazole;
further, the sulfenamides are preferably N-cyclohexyl-2-benzothiazole sulfenamides.
As a preferred embodiment, the stabilizer is polysulfide.
Further, the polysulfide is at least one of potassium polysulfide and sodium polysulfide.
As a preferable technical scheme, the coupling agent is a silane coupling agent.
Further, the silane coupling agent contains at least one of chlorine group, methoxy group, ethoxy group, methoxyethoxy group, acetoxy group, vinyl group, amino group, epoxy group, mercapto group and methacryloxy group;
further, the silane coupling agent is preferably gamma-aminopropyl triethoxysilane.
The gamma-aminopropyl triethoxy silane contains two different active groups of amino and ethoxy, and the ethoxy group of the inorganics in the molecular structure can be subjected to coupling reaction with the surface of the fiber; the amino group of the organophilic matters can chemically react with SBS and other polymers or generate hydrogen bonds to dissolve in the SBS and other polymers, so that the interface effect between the fiber and SBS is improved, the viscosity of asphalt is increased, and the modified asphalt cement forms firm adhesive force with the surface of stone, thereby greatly improving the anti-falling property of stone.
In a second aspect, the present invention provides a method of preparing a high viscosity asphalt modifier, the method comprising the steps of:
(1) Mixing SBS and cosolvent at 100-120 deg.c for 10-30 min;
(2) Cooling to 60-90 ℃, adding the fiber, the cross-linking agent, the accelerator, the stabilizer and the coupling agent, and uniformly mixing for 30-50 minutes to obtain the modifier base material;
(3) Adding the modifier base material into an extruder for granulating at 60-70 ℃ to obtain the high-viscosity asphalt modifier.
As a preferred embodiment, the high viscosity asphalt modifier is used to modify road petroleum asphalt; wherein, 100 parts of road petroleum asphalt is added with 40 parts of high-viscosity asphalt modifier.
The beneficial effects are that:
(1) The addition of the cosolvent, the cross-linking agent, the accelerator, the stabilizer and the coupling agent makes the asphalt modifier and the petroleum asphalt not be simply physically blended; thus, stable chemical bond connection can be formed between the petroleum asphalt and the asphalt modifier, the asphalt colloid structure is changed, and the compatibility, cracking resistance and waterproofness of the asphalt are comprehensively improved. In addition, the stable chemical bond connection between the asphalt modifier and the petroleum asphalt can reduce segregation of the asphalt modifier.
(2) The polyacrylonitrile fiber and the polyester fiber can be compounded with asphalt modifier to modify petroleum asphalt. The polyacrylonitrile fiber and the polyester fiber can be filled in cracks of the modifier, so that the dispersion of the modifier phase is promoted, microcracks caused by environmental changes are prevented and inhibited, and the cracking resistance of the asphalt modifier is improved.
(3) The ethylene-vinyl acetate copolymer is a random copolymer with high branching degree, and is formed by copolymerizing nonpolar ethylene monomer and strong polar vinyl acetate monomer; the ethylene-vinyl acetate copolymer introduces vinyl acetate monomer into the molecular chain of the polyethylene, so that the copolymer can form a closed cell structure in the asphalt modifier, and the waterproof property of the asphalt modifier is improved. When the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 28-33%, the prepared asphalt modifier has the strongest effect of dispersing and stabilizing petroleum asphalt; when the mass fraction of the vinyl acetate groups is lower than 28%, the adsorption force between the asphalt modifier and petroleum asphalt molecules is weak, so that the asphalt modifier is not beneficial to dispersing the petroleum asphalt; when the mass fraction of the vinyl acetate group is more than 33%, the adsorption force between the asphalt modifier and petroleum asphalt molecules can be enhanced by increasing the mass fraction of the vinyl acetate group, but the space blocking effect generated by the nonpolar chain of the ethylene-vinyl acetate copolymer can be destroyed, so that the effect of dispersing and stabilizing the petroleum asphalt by the asphalt modifier is reduced.
(4) The 2-mercaptobenzothiazole zinc salt and the N-cyclohexyl-2-benzothiazole sulfenamide are cyclic compounds containing sulfur and nitrogen heteroatoms, so that the content of aromatic components in the asphalt modifier is increased, the asphalt modifier can be better compatible in petroleum asphalt, and the compatibility rate of the asphalt modifier, the stabilizer and the like with asphalt is improved; promote the polymer in the asphalt modifier to form a sulfur-oxygen bond, so that the network structure of the system is firmer, and the high-temperature stability of the modified asphalt system is obviously improved.
Detailed Description
The present invention will be specifically described below by way of examples. It is noted herein that the following examples are given solely for the purpose of further illustration and are not to be construed as limitations on the scope of the invention, as will be apparent to those skilled in the art in light of the foregoing disclosure.
In addition, the raw materials used are commercially available unless otherwise indicated.
Example 1
Example 1 provides a high viscosity asphalt modifier comprising the following raw materials in parts by weight: 20 parts of SBS, 15 parts of polymer fiber, 1 part of ethylene-vinyl acetate copolymer (CAS NO: 24937-78-8), 1 part of sulfur, 1 part of accelerator, 1 part of sodium polysulfide and 1 part of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-4303 star-shaped SBS;
the polyacrylonitrile fiber and the polyester fiber in the polymer fiber are purchased from building materials of Hengzhou, and the weight ratio of the polyacrylonitrile fiber to the polyester fiber is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 28%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole (CAS NO: 155-04-4) to N-cyclohexyl-2-benzothiazole sulfenamide (CAS NO: 95-33-0) in the accelerator is 1:0.5;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 100deg.C for 10min; (2) Cooling to 60 ℃, adding polymer fiber, sulfur, accelerator, sodium polysulfide and gamma-aminopropyl triethoxysilane, and uniformly mixing for 30min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 60 ℃ to obtain the high-viscosity asphalt modifier.
Example 2
Example 2 provides a high viscosity asphalt modifier comprising the following raw materials in parts by weight: 25 parts of SBS, 18 parts of polymer fiber, 5 parts of ethylene-vinyl acetate copolymer, 2 parts of sulfur, 1.5 parts of accelerator, 2 parts of sodium polysulfide and 1.5 parts of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-791 linear SBS;
the weight ratio of the polyacrylonitrile fiber to the polyester fiber in the polymer fiber is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole to the N-cyclohexyl-2-benzothiazole sulfenamide in the accelerator is 1:0.5;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110deg.C for 20min; (2) Cooling to 75 ℃, adding polymer fiber, sulfur, accelerator, sodium polysulfide and gamma-aminopropyl triethoxysilane, and uniformly mixing for 40min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 65 ℃ to obtain the high-viscosity asphalt modifier.
Example 3
Example 3 provides a high viscosity asphalt modifier comprising the following raw materials in parts by weight: 30 parts of SBS, 20 parts of polymer fiber, 10 parts of ethylene-vinyl acetate copolymer, 3 parts of sulfur, 2 parts of accelerator, 3 parts of sodium polysulfide and 2 parts of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-796 linear SBS;
the weight ratio of the polyacrylonitrile fiber to the polyester fiber in the polymer fiber is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 33%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole to the N-cyclohexyl-2-benzothiazole sulfenamide in the accelerator is 1:0.5;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 120deg.C for 30min; (2) Cooling to 90 ℃, adding polymer fiber, sulfur, accelerator, sodium polysulfide and gamma-aminopropyl triethoxysilane, and uniformly mixing for 50min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 70 ℃ to obtain the high-viscosity asphalt modifier.
Comparative example 1
Comparative example 1 provides a high viscosity asphalt modifier comprising the following raw materials in parts by weight: 25 parts of SBS, 5 parts of ethylene-vinyl acetate copolymer, 2 parts of sulfur, 1.5 parts of accelerator, 2 parts of sodium polysulfide and 1.5 parts of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-796 linear SBS;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole to the N-cyclohexyl-2-benzothiazole sulfenamide in the accelerator is 1:0.5;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110deg.C for 20min; (2) Cooling to 75 ℃, adding sulfur, an accelerator, sodium polysulfide and gamma-aminopropyl triethoxysilane, and uniformly mixing for 40min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 65 ℃ to obtain the high-viscosity asphalt modifier.
Comparative example 2
Comparative example 2 provides a high viscosity asphalt modifier comprising the following raw materials in parts by weight: 25 parts of SBS, 18 parts of polymer fiber, 5 parts of ethylene-vinyl acetate copolymer, 2 parts of sulfur, 1.5 parts of accelerator and 2 parts of sodium polysulfide;
wherein SBS is YH-796 linear SBS;
the weight ratio of the polyacrylonitrile fiber to the polyester fiber in the polymer fiber is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole to the N-cyclohexyl-2-benzothiazole sulfenamide in the accelerator is 1:0.5;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110deg.C for 20min; (2) Cooling to 75 ℃, adding polymer fibers, sulfur, an accelerator and sodium polysulfide, and uniformly mixing for 40min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 65 ℃ to obtain the high-viscosity asphalt modifier.
Performance testing
The asphalt modifiers prepared in examples 1 to 3 and comparative examples 1 to 2 were used as raw materials, and the following tests were performed on road petroleum asphalt 100 parts by weight and high-viscosity asphalt modifier 40 parts by weight to prepare modified asphalt:
1. performance measurement is carried out according to JTG F40-2004 technical Specification for Highway asphalt pavement construction (Marshall stability is not less than 8N; soaking Marshall stability ratio is not less than 85%, freezing splitting strength ratio is not less than 80%, standard fly is not more than 15%, soaking fly is not more than 20%, etc.).
2. Isolation: performance measurements were carried out according to T0661-2000 (at. Ltoreq.2.5℃).
The performance test of the modified asphalt obtained in examples 1 to 3 and comparative examples 1 to 2 is shown in Table 1:
TABLE 1
Claims (3)
1. The high-viscosity asphalt modifier is characterized by comprising the following raw materials in parts by weight: 25 parts of SBS, 18 parts of polymer fiber, 5 parts of ethylene-vinyl acetate copolymer, 2 parts of sulfur, 1.5 parts of accelerator, 2 parts of sodium polysulfide and 1.5 parts of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-791 linear SBS;
the weight ratio of the polyacrylonitrile fiber to the polyester fiber in the polymer fiber is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30%;
the weight ratio of the zinc salt of 2-mercaptobenzothiazole to the N-cyclohexyl-2-benzothiazole sulfenamide in the accelerator is 1:0.5.
2. A method of preparing the high viscosity asphalt modifier of claim 1, comprising the steps of:
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110deg.C for 20min; (2) Cooling to 75 ℃, adding polymer fiber, sulfur, accelerator, sodium polysulfide and gamma-aminopropyl triethoxysilane, and uniformly mixing for 40min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulating at 65 ℃ to obtain the high-viscosity asphalt modifier.
3. Use of the high viscosity asphalt modifier according to claim 1 for modifying road petroleum asphalt.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3442841A (en) * | 1962-04-13 | 1969-05-06 | Du Pont | Asphalt-ethylene/vinyl acetate copolymer compositions |
| JPH07278440A (en) * | 1994-04-06 | 1995-10-24 | Oozeki Kagaku Kogyo Kk | Asphalt composition and road pavement material using the same |
| CN106587705A (en) * | 2016-12-21 | 2017-04-26 | 北京中路铺面技术有限公司 | SMA asphalt concrete modifier and preparation method thereof |
| CN109762350A (en) * | 2018-12-19 | 2019-05-17 | 青岛科凯达橡塑有限公司 | A kind of conductive asphalt modifying agent and preparation method thereof |
-
2022
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3442841A (en) * | 1962-04-13 | 1969-05-06 | Du Pont | Asphalt-ethylene/vinyl acetate copolymer compositions |
| JPH07278440A (en) * | 1994-04-06 | 1995-10-24 | Oozeki Kagaku Kogyo Kk | Asphalt composition and road pavement material using the same |
| CN106587705A (en) * | 2016-12-21 | 2017-04-26 | 北京中路铺面技术有限公司 | SMA asphalt concrete modifier and preparation method thereof |
| CN109762350A (en) * | 2018-12-19 | 2019-05-17 | 青岛科凯达橡塑有限公司 | A kind of conductive asphalt modifying agent and preparation method thereof |
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| Title |
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| 肖庆一等."偶联剂改善沥青混凝土性能及油石界面试验研究".《东南大学学报（自然科学版）》.2004,第34卷(第4期),第485-489页. * |
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| CN115386235A (en) | 2022-11-25 |
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