CN115386235A - 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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- CN115386235A CN115386235A CN202210035543.1A CN202210035543A CN115386235A CN 115386235 A CN115386235 A CN 115386235A CN 202210035543 A CN202210035543 A CN 202210035543A CN 115386235 A CN115386235 A CN 115386235A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 85
- 239000003607 modifier Substances 0.000 title claims abstract description 70
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000006184 cosolvent Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 239000007822 coupling agent Substances 0.000 claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- -1 accelerant Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 24
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 24
- 229920005594 polymer fiber Polymers 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 16
- 239000003208 petroleum Substances 0.000 claims description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 150000003557 thiazoles Chemical class 0.000 claims description 4
- 229920001021 polysulfide Polymers 0.000 claims description 3
- 239000005077 polysulfide Substances 0.000 claims description 3
- 150000008117 polysulfides Polymers 0.000 claims description 3
- 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 claims description 2
- 239000010692 aromatic oil Substances 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000012990 dithiocarbamate Substances 0.000 claims description 2
- 150000004659 dithiocarbamates Chemical class 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 150000004665 fatty acids Chemical class 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 150000003464 sulfur compounds Chemical class 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical group CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 13
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 11
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical group CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 10
- 229920002239 polyacrylonitrile Polymers 0.000 description 9
- 229920000728 polyester Polymers 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- STSDHUBQQWBRBH-UHFFFAOYSA-N n-cyclohexyl-1,3-benzothiazole-2-sulfonamide Chemical compound N=1C2=CC=CC=C2SC=1S(=O)(=O)NC1CCCCC1 STSDHUBQQWBRBH-UHFFFAOYSA-N 0.000 description 6
- 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 6
- 238000001035 drying Methods 0.000 description 4
- 230000009471 action Effects 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
- 239000000126 substance Substances 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical class C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005204 segregation Methods 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
- SHXCHSNZIGEBFL-UHFFFAOYSA-N 1,3-benzothiazole;zinc Chemical compound [Zn].C1=CC=C2SC=NC2=C1 SHXCHSNZIGEBFL-UHFFFAOYSA-N 0.000 description 1
- GIUBHMDTOCBOPA-UHFFFAOYSA-N 3h-1,3-benzothiazole-2-thione;zinc Chemical compound [Zn].C1=CC=C2SC(S)=NC2=C1 GIUBHMDTOCBOPA-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
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 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
- 239000006185 dispersion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 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
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 239000007858 starting material Substances 0.000 description 1
- 238000003860 storage Methods 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
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 accelerant, 1-3 parts of stabilizer and 1-2 parts of coupling agent; the preparation method comprises the steps of firstly mixing SBS and cosolvent, and further mixing fiber, cross-linking agent, accelerant, stabilizing agent and coupling agent to form the asphalt modifier; its advantages are simple preparing process, high viscosity, and high resistance to cracking and water.
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 the harsh weather, modern highways and roadways are challenged severely. However, the asphalt material is the most widely used in the highway, but the phenomena of rutting, cracking and the like occur on the road surface due to the traditional petroleum asphalt as the road surface structure material, which is not favorable for the safety and comfort of driving, and increases the cost for frequently repairing the road.
Currently, SBS modified asphalt gradually replaces traditional asphalt. The SBS modified asphalt is divided into a wet process and a dry process, and compared with the wet process, the dry process omits the links of grinding and storage in a factory, so that the dry process 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 makes SBS graft modified through the action of chemical grafting agent and accelerant, thereby achieving good compatibility of SBS and asphalt and easy blending. The patent (CN 201510608456.0) discloses SBS modified asphalt and a preparation method thereof, and the SBS modified asphalt is chemically stable SBS modified asphalt, has good high-temperature performance and anti-rutting performance, and has excellent thermal stability. However, no report is made on a solution for improving both cracking resistance and water resistance.
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 accelerant, 1-3 parts of stabilizer and 1-2 parts of coupling agent.
As a preferred technical solution, 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-shaped SBS is at least one of YH-4303 star-shaped SBS, YH-815 star-shaped SBS and YH-803 star-shaped SBS;
as a preferred technical solution, the fiber is at least one of polymer fiber and lignin fiber;
further, the fibers are preferably polymer 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 fiber is preferably polyacrylonitrile fiber and polyester fiber.
As a preferred technical scheme, the cosolvent is at least one of aromatic 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%.
In a preferred embodiment, the crosslinking agent is at least one of sulfur, a sulfur compound, and triallyl isocyanurate.
As a preferable technical scheme, the accelerant is at least one of thiazoles, thiurams, sulfenamides, dithiocarbamates, aldamines, metal oxides and fatty acids;
further, the accelerators are preferably thiazoles and sulfenamides;
further, the thiazoles are preferably 2-mercaptobenzothiazole zinc salt;
further, the sulfenamides are preferably N-cyclohexyl-2-benzothiazolesulfenamides.
As a preferred embodiment, the stabilizer is polysulfide.
Further, the polysulfide is at least one of potassium polysulfide and sodium polysulfide.
As a preferred technical scheme, the coupling agent is a silane coupling agent.
Further, the silane coupling agent contains at least one of a chloro group, a methoxy group, an ethoxy group, a methoxyethoxy group, an acetoxy group, a vinyl group, an amino group, an epoxy group, a mercapto group and a methacryloxy group as a functional group;
further, the silane coupling agent is preferably γ -aminopropyltriethoxysilane.
The gamma-aminopropyl triethoxy silane contains two different active groups of amino and ethoxy, and the ethoxy group of an inorganics in a molecular structure can generate coupling reaction with the surface of the fiber; the amino group of the organophilic group can react with SBS and other polymers or generate hydrogen bond to be dissolved in the SBS, so that the interface action between the fiber and SBS is improved, the viscosity of the asphalt is increased, and the modified asphalt cement and the surface of stone form firm adhesion, thereby greatly improving the anti-falling performance of the stone.
The second aspect of the present invention provides a preparation method of a high viscosity asphalt modifier, comprising the following steps:
(1) Mixing SBS and cosolvent at 100-120 deg.c for 10-30 min;
(2) Cooling to 60-90 ℃, adding the fiber, the crosslinking agent, the accelerator, the stabilizer and the coupling agent, and uniformly mixing for 30-50 minutes to obtain a modifier base material;
(3) Adding the modifier base material into an extruder for granulation at the temperature of 60-70 ℃ to obtain the high-viscosity asphalt modifier.
As a preferred embodiment, the high viscosity asphalt modifier is used for modifying road petroleum asphalt; wherein 40 parts of high-viscosity asphalt modifier is added into 100 parts of road petroleum asphalt.
Has the advantages that:
(1) The addition of the cosolvent, the crosslinking agent, the accelerator, the stabilizer and the coupling agent ensures that the asphalt modifier and the petroleum asphalt are not simply physically blended; therefore, stable chemical bond connection can be formed between the petroleum asphalt and the asphalt modifier, the asphalt colloid structure is changed, and the compatibility, the cracking resistance and the water resistance of the asphalt are comprehensively improved. In addition, the stable chemical bond connection between the asphalt modifier and the petroleum asphalt can reduce the segregation of the asphalt modifier.
(2) The polyacrylonitrile fiber and the polyester fiber can be compounded with the asphalt modifier to modify the petroleum asphalt. The polyacrylonitrile fiber and the polyester fiber can be filled in the crack of the modifier, promote the dispersion of the modifier phase, prevent and inhibit the micro-crack caused by environmental change, and improve the anti-cracking performance of the asphalt modifier.
(3) The ethylene-vinyl acetate copolymer is a random copolymer with high branching degree and is formed by copolymerizing non-polar ethylene monomers and strong-polar vinyl acetate monomers; the ethylene-vinyl acetate copolymer introduces vinyl acetate monomer into the molecular chain of polyethylene, so that the copolymer can form a closed cell structure in the asphalt modifier, and the waterproofness 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 group is less than 28%, the adsorption action force between the asphalt modifier and the petroleum asphalt molecules is weak, which is not beneficial to the asphalt modifier to disperse the petroleum asphalt; when the mass fraction of the vinyl acetate group is more than 33 percent, the increase of the mass fraction of the vinyl acetate group can enhance the adsorption force between the asphalt modifier and petroleum asphalt molecules, but can destroy the steric hindrance effect generated by the nonpolar chain of the ethylene-vinyl acetate copolymer, thereby reducing the effect of the asphalt modifier in dispersing and stabilizing the petroleum asphalt.
(4) The 2-thiol benzothiazole zinc salt and the N-cyclohexyl-2-benzothiazole sulfonamide 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 well compatible in petroleum asphalt, and the compatibility rate of the asphalt modifier, the stabilizer and the like with the asphalt is improved; promote the polymer in the asphalt modifier to form sulfur-oxygen bonds, 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 to be noted that the following examples are given solely for the purpose of illustration and are not to be construed as limitations on the scope of the invention, as many insubstantial modifications and variations of the invention described above will now occur to those skilled in the art.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Example 1
Embodiment 1 provides a high viscosity asphalt modifier, which comprises 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 accelerant, 1 part of sodium polysulfide and 1 part of gamma-aminopropyltriethoxysilane;
wherein SBS is YH-4303 star SBS;
the polyacrylonitrile fiber and the polyester fiber in the polymer fiber are purchased from Changzhou Tunwei building materials, inc., 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 percent;
the weight ratio of the 2-mercaptobenzothiazole zinc salt (CAS NO: 155-04-4) to the N-cyclohexyl-2-benzothiazole sulfonamide (CAS NO: 95-33-0) in the accelerator is 1;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 100 deg.C for 10min; (2) Cooling to 60 ℃, adding polymer fiber, sulfur, accelerator, sodium polysulfide and gamma-aminopropyltriethoxysilane, and mixing uniformly for 30min to obtain modifier base material; (3) And adding the modifier base material into an extruder for granulation at the temperature of 60 ℃ to obtain the high-viscosity asphalt modifier.
Example 2
Embodiment 2 provides a high viscosity asphalt modifier, which comprises 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-aminopropyltriethoxysilane;
wherein SBS is YH-791 linear SBS;
the weight ratio of polyacrylonitrile fibers to polyester fibers in the polymer fibers is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30 percent;
the weight ratio of the 2-mercaptobenzothiazole zinc salt to the N-cyclohexyl-2-benzothiazole sulfonamide in the accelerator is 1;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110 deg.C for 20min; (2) Cooling to 75 ℃, adding polymer fiber, sulfur, an accelerator, sodium polysulfide and gamma-aminopropyltriethoxysilane, and mixing uniformly for 40min to obtain a modifier base material; (3) And adding the modifier base material into an extruder for granulation at the temperature of 65 ℃ to obtain the high-viscosity asphalt modifier.
Example 3
Embodiment 3 provides a high viscosity asphalt modifier, which comprises 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 accelerant, 3 parts of sodium polysulfide and 2 parts of gamma-aminopropyl triethoxysilane;
wherein SBS is YH-796 linear SBS;
the weight ratio of polyacrylonitrile fibers to polyester fibers in the polymer fibers is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 33 percent;
the weight ratio of the 2-mercaptobenzothiazole zinc salt to the N-cyclohexyl-2-benzothiazole sulfonamide in the accelerator is 1;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 120 deg.C for 30min; (2) Cooling to 90 ℃, adding polymer fiber, sulfur, an accelerator, sodium polysulfide and gamma-aminopropyltriethoxysilane, and mixing uniformly for 50min to obtain a modifier base material; (3) Adding the modifier base material into an extruder for granulation at the temperature of 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 accelerant, 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 percent;
the weight ratio of the 2-mercaptobenzothiazole zinc salt to the N-cyclohexyl-2-benzothiazole sulfonamide in the accelerator is 1;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110 deg.C for 20min; (2) Cooling to 75 ℃, adding sulfur, an accelerator, sodium polysulfide and gamma-aminopropyltriethoxysilane, and uniformly mixing for 40min to obtain a modifier base material; (3) And adding the modifier base material into an extruder for granulation at the temperature of 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 accelerant and 2 parts of sodium polysulfide;
wherein SBS is YH-796 linear SBS;
the weight ratio of polyacrylonitrile fibers to polyester fibers in the polymer fibers is 1:1;
the mass fraction of vinyl acetate groups in the ethylene-vinyl acetate copolymer is 30 percent;
the weight ratio of the 2-mercaptobenzothiazole zinc salt to the N-cyclohexyl-2-benzothiazole sulfonamide in the accelerator is 1;
the preparation method comprises the following steps: (1) Mixing SBS and ethylene-vinyl acetate copolymer at 110 deg.C for 20min; (2) Cooling to 75 ℃, adding polymer fiber, sulfur, accelerant and sodium polysulfide, and mixing uniformly for 40min to obtain modifier base material; (3) And adding the modifier base material into an extruder for granulation at the temperature of 65 ℃ to obtain the high-viscosity asphalt modifier.
Performance testing
The asphalt modifier prepared in the examples 1-3 and the comparative examples 1-2 is used as a raw material, 100 parts of road petroleum asphalt and 40 parts of high-viscosity asphalt modifier are calculated according to parts by weight, and the following tests are carried out:
1. the performance measurement is carried out according to JTG F40-2004 technical Specification for construction of asphalt pavement for roads (Marshall stability is not less than 8N, marshall stability ratio for soaking is not less than 85%, freeze splitting strength ratio is not less than 80%, standard scattering is not more than 15%, scattering for soaking is not more than 20%, etc.).
2. Segregation property: performance measurements were carried out according to T0661-2000 (. Ltoreq.2.5 ℃ C.).
The performance tests of the modified asphalts obtained in examples 1 to 3 and comparative examples 1 to 2 are shown in Table 1:
TABLE 1
Claims (10)
1. The high-viscosity asphalt modifier is characterized by comprising 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 accelerant, 1-3 parts of stabilizer and 1-2 parts of coupling agent.
2. The high viscosity asphalt modifier according to claim 1, wherein the SBS is at least one of a linear SBS and a star SBS.
3. The high viscosity asphalt modifier according to claim 1, wherein the fiber is at least one of a polymer fiber and a lignin fiber.
4. The high viscosity asphalt modifier according to claim 1, wherein the cosolvent is at least one of aromatic oil, naphthenic rubber oil, and ethylene-vinyl acetate copolymer.
5. The high viscosity asphalt modifier according to claim 1, wherein the crosslinking agent is at least one of sulfur, a sulfur compound, and triallyl isocyanurate.
6. The high viscosity asphalt modifier according to claim 1, wherein the accelerator is at least one of thiazoles, thiurams, sulfenamides, dithiocarbamates, aldamines, metal oxides, and fatty acids.
7. The high viscosity asphalt modifier according to claim 1, wherein the stabilizer is a polysulfide.
8. The high viscosity asphalt modifier according to claim 1, wherein the coupling agent is a silane coupling agent.
9. A method for preparing a high viscosity asphalt modifier according to any one of claims 1 to 8, 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 crosslinking agent, the accelerator, the stabilizer and the coupling agent, and uniformly mixing for 30-50 minutes to obtain a modifier base material;
(3) Adding the modifier base material into an extruder for granulation at the temperature of 60-70 ℃ to obtain the high-viscosity asphalt modifier.
10. Use of the high viscosity asphalt modifier according to any one of claims 1 to 9, wherein the high viscosity asphalt modifier is used for modifying road petroleum asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210035543.1A CN115386235B (en) | 2022-01-13 | 2022-01-13 | Preparation method and application of high-viscosity asphalt modifier |
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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 |
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- 2022-01-13 CN CN202210035543.1A patent/CN115386235B/en active Active
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 |
Non-Patent Citations (1)
| Title |
|---|
| 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"" * |
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