CN116426135A - Composite modified high-viscosity asphalt and preparation method thereof - Google Patents
Composite modified high-viscosity asphalt and preparation method thereof Download PDFInfo
- Publication number
- CN116426135A CN116426135A CN202310281859.3A CN202310281859A CN116426135A CN 116426135 A CN116426135 A CN 116426135A CN 202310281859 A CN202310281859 A CN 202310281859A CN 116426135 A CN116426135 A CN 116426135A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- viscosity
- percent
- composite modified
- raw materials
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 152
- 239000002131 composite material Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims description 13
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 239000000843 powder Substances 0.000 claims abstract description 32
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 27
- 239000002699 waste material Substances 0.000 claims abstract description 23
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 239000002318 adhesion promoter Substances 0.000 claims abstract description 20
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims abstract description 19
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 18
- QNYBOILAKBSWFG-UHFFFAOYSA-N 2-(phenylmethoxymethyl)oxirane Chemical compound C1OC1COCC1=CC=CC=C1 QNYBOILAKBSWFG-UHFFFAOYSA-N 0.000 claims abstract description 17
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims abstract description 17
- 229920001610 polycaprolactone Polymers 0.000 claims abstract description 17
- 239000004632 polycaprolactone Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims description 30
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 22
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 19
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 18
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 13
- 125000003545 alkoxy group Chemical group 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 229920000098 polyolefin Polymers 0.000 claims description 13
- 229910000077 silane Inorganic materials 0.000 claims description 13
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 10
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 10
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 10
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- GXJQMKFJQFGQKV-KHPPLWFESA-N 2-[methyl-[(z)-octadec-9-enoyl]amino]ethanesulfonic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)N(C)CCS(O)(=O)=O GXJQMKFJQFGQKV-KHPPLWFESA-N 0.000 claims description 7
- 239000003945 anionic surfactant Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- 229920000642 polymer Polymers 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 235000019441 ethanol Nutrition 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 239000012264 purified product Substances 0.000 claims description 3
- 239000011541 reaction mixture Substances 0.000 claims description 3
- 230000036632 reaction speed Effects 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000000859 sublimation Methods 0.000 claims description 3
- 230000008022 sublimation Effects 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 125000000524 functional group Chemical group 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- 229940104256 sodium taurate Drugs 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 20
- 230000008901 benefit Effects 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 22
- 230000032683 aging Effects 0.000 description 17
- 238000004064 recycling Methods 0.000 description 13
- 238000011056 performance test Methods 0.000 description 9
- 239000010920 waste tyre Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000004698 Polyethylene Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 6
- 229920000573 polyethylene Polymers 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000003712 anti-aging effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005204 segregation Methods 0.000 description 3
- 230000002522 swelling effect Effects 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000010538 cationic polymerization reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229940104261 taurate Drugs 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 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
- 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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of road material modified asphalt, and provides composite modified high-viscosity asphalt which comprises the following raw materials in parts by weight: 70.0% of sk90 matrix asphalt, 18.5% of waste rubber powder, 2.0% of acrylonitrile-butadiene-styrene copolymer, 1.7% of polycaprolactone, 1.2% of benzyl glycidyl ether 692, 0.7% of dicyclopentadiene, 0.9% of POE DF840, 3.0% of viscosity reducer and 2.0% of adhesion promoter. The result of a great deal of research and experiments shows that the modified asphalt produced by the invention is applied to the pavement of asphalt pavement, can obviously improve the high-temperature stability and construction workability of the pavement, improves the poor low-temperature performance of rubber asphalt to a certain extent, reduces the cost of overall engineering, and has better economic benefit and environmental benefit.
Description
Technical Field
The invention relates to the technical field of road material modified asphalt, in particular to composite modified high-viscosity asphalt and a preparation method thereof.
Background
Along with the gradual promotion of sponge city construction, the pavement area of the drainage pavement is larger and larger, and the demand for the drainage asphalt mixture is rapidly increased. The drainage asphalt mixture has large gaps and more communicated gaps, so that the adhesion and ageing resistance requirements on asphalt binders are extremely high. It is estimated that the yield of the waste tires in China is close to 2000 ten thousand tons at the end of 2020, and serious environmental pollution and resource waste are caused along with the massive discarding and accumulation of the waste tires. The rubber-asphalt prepared by grinding the waste tires into waste tire rubber powder has good high-temperature property, ageing resistance and durability, shows good road performance, and is widely paid attention to by industry personnel due to good economic and environmental benefits. The traditional high-viscosity asphalt has high cost and weak ageing resistance. Meanwhile, the waste tire rubber powder belongs to inert materials, and has poor compatibility with asphalt, so that the partial service performance of rubber-asphalt is limited, and the excessive viscosity of the waste tire rubber powder can cause the excessive mixing construction temperature of the mixture, further increase the construction difficulty, accelerate the thermo-oxidative aging of asphalt and cause excessive consumption of energy.
It is therefore important to study how to reduce the cost and increase the compatibility of high viscosity modified asphalt, while properly reducing the viscosity of rubber-asphalt can increase workability and reduce energy consumption. Based on the method, the invention provides the high-viscosity composite modified asphalt which takes the waste rubber powder as the main material and has the advantages of low cost, resource recycling, high viscosity, strong aging resistance and the like.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the composite modified high-viscosity asphalt with the advantages of low cost, resource recycling, high viscosity, strong ageing resistance, good construction workability and the like, so as to delay the ageing of asphalt, ensure the high-low temperature performance of the asphalt pavement in the later use period and prolong the service life of the asphalt pavement. The invention is realized by adopting the following technical scheme:
the preparation raw materials of the composite modified high-viscosity asphalt comprise:
SK90 matrix asphalt, waste rubber powder, acrylonitrile-butadiene-styrene copolymer, polycaprolactone, benzyl glycidyl ether 692, dicyclopentadiene and POE DF840, viscosity reducer, and adhesion promoter.
In the preferred scheme, the preparation raw materials comprise 65.8-70.6% of sk90 matrix asphalt, 18.0-20.0% of waste rubber powder, 1.7-2.5% of acrylonitrile-butadiene-styrene copolymer, 1.5-2.0% of polycaprolactone, 1.0-1.5% of benzyl glycidyl ether 692, 0.5-1.0% of dicyclopentadiene, 0.7-1.0% of POE DF840, 3.0-5.0% of viscosity reducer and 2.0-3.0% of adhesion promoter by weight percent.
In a preferred scheme, the preparation raw materials comprise 70.0% of sk90 matrix asphalt, 18.5% of waste rubber powder, 2.0% of acrylonitrile-butadiene-styrene copolymer, 1.7% of polycaprolactone, 1.2% of benzyl glycidyl ether 692, 0.7% of dicyclopentadiene, 0.9% of POE DF840, 3.0% of viscosity reducer and 2.0% of adhesion promoter in percentage by weight.
In a preferred scheme, the viscosity reducer adopts an anionic surfactant N-oleoyl N-methyl taurine sodium salt to carry out organic modification on montmorillonite, and then three monomers of maleic anhydride, acrylamide and methyl alkenyl polyoxyethylene ether are selected and grafted under the condition that potassium persulfate is taken as an initiator to form the nano montmorillonite and polymer composite viscosity reducer.
In a preferred scheme, the viscosity reducer is prepared by mixing the following raw materials in parts by weight: 3.0 to 5.0 percent of anionic surfactant N-oleoyl N-methyl taurine sodium, 45.6 to 50.8 percent of montmorillonite, 3.0 to 4.0 percent of potassium persulfate, 15.6 to 18.8 percent of maleic anhydride, 12.6 to 14.8 percent of acrylamide and 10.2 to 11.4 percent of methyl alkenyl polyoxyethylene ether.
In a preferred scheme, the viscosity reducer is prepared by mixing the following raw materials in parts by weight: 4.0% of anionic surfactant N-oleoyl N-methyl taurine sodium, 48.6% of montmorillonite, 3.5% of potassium persulfate, 18.6% of maleic anhydride, 13.9% of acrylamide and 11.4% of methyl alkenyl polyoxyethylene ether. The sum of the weight portions of the raw materials is 100 percent.
In a preferred scheme, the adhesion promoter is prepared by mixing the following raw materials in parts by weight: chlorinated polyolefin, alkoxy functional silane oligomer, BH-403 epoxy resin.
In a preferred scheme, the adhesion promoter is prepared by mixing the following raw materials in parts by weight: 18 to 20 percent of chlorinated polyolefin, 25 to 30 percent of alkoxy functional group silane oligomer and 45 to 50 percent of BH-403 epoxy resin.
In a preferred scheme, the adhesion promoter is prepared by mixing the following raw materials in parts by weight: 20% of chlorinated polyolefin, 30% of alkoxy functional silane oligomer and 50% of BH-403 epoxy resin.
The preparation method of the composite modified high-viscosity asphalt comprises the following steps:
s1: firstly, montmorillonite and absolute ethyl alcohol are added into a reaction bottle according to the mass ratio of 1:20, and are placed into a constant-temperature water bath kettle at 80 ℃ to be stirred for 1h at a high speed of 4000r/min under the ultrasonic condition; dissolving N-oleoyl N-methyl sodium taurate surfactant with a certain amount of absolute ethyl alcohol, adding into a reaction bottle, and continuing ultrasonic stirring for 2h at high speed; filtering and washing the reacted product with deionized water until no Cl-exists by using an AgNO3 solution with the concentration of 0.20 mol/L; drying the product in a vacuum drying oven at 100 ℃ for 36h; grinding and sieving to obtain organic modified montmorillonite, i.e. uniform mixture A;
s2: adding maleic anhydride, acrylamide, methyl alkenyl polyoxyethylene ether and the mixture A into a three-neck flask with a dropping funnel, a stirrer and a thermometer; heating the reaction mixture to a reaction temperature, adding potassium persulfate through a dropping funnel, simultaneously adding the potassium persulfate under the protection of nitrogen for reacting for a preset time, and cooling to room temperature; repeatedly washing the reactant cooled to room temperature with ethanol, and then drying the precipitate at room temperature in vacuum to obtain a final purified product; changing the dosage of the three monomers to prepare the nano montmorillonite and polymer composite viscosity reducer with different grafting rates, namely a mixture B;
s3: mixing chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin according to the ratio of 2:3:5, pouring a certain amount of chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin into a 100ml beaker, then placing the beaker filled with the mixture into a DF-101S constant temperature oil bath pot (manufactured by a pre-sublimation instrument) with the temperature raised to 80 ℃ for rapid heating, starting stirring, wherein the stirring speed is required to be increased from slow to a set reaction speed of 2500r/min, and after the mixture reacts for 60min, finishing organic modification of montmorillonite to obtain a uniform mixture C;
s4, preheating sk90 matrix asphalt to 185 ℃ in an oven, adding the mixture B and the mixture C, stirring at a high speed at 180 ℃ for 90min, adding acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride, polycaprolactone, benzyl glycidyl ether 692, dicyclopentadiene and POE DF840 according to the proportion, and stirring at 180 ℃ for 30min by using an electric stirrer at 3000r/min to obtain the modified asphalt.
The beneficial effects achieved by the invention are as follows:
1. the rubber asphalt has the advantages of low cost, resource recycling, high viscosity, strong aging resistance and the like. The invention adds the waste rubber powder into the asphalt, can greatly improve the viscosity of the asphalt material, improve the volume deformation caused by temperature change, improve the cracking resistance, and reduce the engineering cost and the later road maintenance cost.
2. The method comprises the steps of firstly, organically modifying montmorillonite by adopting an anionic surfactant N-oleoyl N-methyl taurine sodium, and then, under the condition that potassium persulfate is used as an initiator, selecting three monomers of maleic anhydride, acrylamide and methyl alkenyl polyoxyethylene ether, and grafting to form the nano montmorillonite and polymer composite viscosity reducer. The viscosity of asphalt can be properly reduced by adding the viscosity reducing agent into rubber asphalt, so that the construction difficulty is reduced, and the viscosity reducing agent has important significance for saving energy consumption.
3. The adhesion promoter used in the invention is prepared by mixing chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin according to the ratio of 2:3:5, and can effectively improve the adhesion of asphalt and aggregate interfaces.
4. The acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride and polycaprolactone used in the invention can improve the compatibility between waste rubber powder and asphalt, improve the swelling effect and reduce the occurrence of asphalt pavement segregation.
5. The benzyl glycidyl ether 692, dicyclopentadiene and POE DF840 used in the invention can be added into rubber asphalt to improve the low-temperature ductility and crack resistance of the rubber asphalt.
6. The result of a great number of researches and experiments shows that the modified asphalt produced by the invention is applied to the pavement of asphalt pavement, can obviously reduce the construction difficulty and the manufacturing cost, reduce the energy consumption, effectively improve the adhesion between asphalt and aggregate interface, improve the compatibility between waste rubber powder and asphalt, improve the swelling effect, reduce the occurrence of segregation phenomenon of asphalt pavement and improve the low-temperature ductility and crack resistance of rubber asphalt. Meanwhile, as a plurality of anti-aging agents exist in the waste rubber powder, the anti-aging capability of asphalt can be effectively improved, cracking phenomenon caused by embrittlement and hardening in the later use period of the asphalt pavement is prevented, and the maintenance period and the service life of the pavement are prolonged.
Detailed Description
The embodiments of the present invention will be clearly and fully described below with reference to examples of the present invention, and the configurations of the structures described in the following embodiments are merely examples, and the present invention is not limited to the configurations described in the following embodiments, and all other embodiments obtained by a person having ordinary skill in the art without making any inventive effort are within the scope of the present invention.
From above-mentioned technical scheme, the synergy mechanism between the raw materials of this application is: waste rubber powder, acrylonitrile-butadiene-styrene copolymer, maleic anhydride, polycaprolactone, benzyl glycidyl ether 692, dicyclopentadiene and POE DF840, viscosity reducer and adhesion promoter. The materials are synergistic mutually, so that the road performance of the modified asphalt is improved.
The rubber asphalt prepared by taking the waste tire rubber powder as the modifier can obviously improve the road performance of asphalt, and improve the road performance of asphalt pavement such as rut resistance, reflection crack resistance, water stability, fatigue crack resistance and the like. The properties of rubber asphalt are mainly due to interactions between rubber and asphalt. After the rubber particles are fully mixed with the asphalt at a high temperature, light components in the asphalt are absorbed, so that the residual asphalt is hardened and the viscosity is increased.
The ABS resin prepared by graft copolymerization of acrylonitrile, butadiene and styrene has the advantages of good strength and toughness, easy processing and forming, low price, degradability, excellent biocompatibility, functional modification and the like, and the maleic anhydride is used as one of components of the anti-stripping agent, so that the adhesion capability of asphalt and aggregate can be effectively increased, and the anti-stripping performance of asphalt pavement is improved. The acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride and polycaprolactone are added into asphalt, so that the interaction between several materials can be enhanced, and meanwhile, the maleic anhydride has some polar groups, so that the polarity of the asphalt is increased, and the adhesive strength between the modified asphalt and aggregate is improved. The compatibility between the rubber powder and the asphalt is improved, the swelling effect is improved, and the occurrence of asphalt pavement segregation is further reduced.
Benzyl glycidyl ether 692 is a common cationic polymerization type epoxy resin reactive diluent, has good dilution effect on epoxy resin, dicyclopentadiene is a novel thermosetting engineering plastic with excellent toughness and rigidity dual mechanical property, can improve the toughness of modified asphalt to a certain extent, and the modified asphalt can generate a large number of cracks when the POE DF840 and dicyclopentadiene core-shell particles impact under the synergistic toughening effect of the POE DF840 and the dicyclopentadiene, thereby absorbing and dispersing a large number of impact energy, preventing the generation of pavement rutting, improving the toughness and the crack resistance of asphalt pavement and improving the low-temperature stability of asphalt.
And simultaneously adding a viscosity reducing agent and an adhesion promoter to improve the construction workability of asphalt and the adhesion performance of aggregate. The method achieves the effects of improving the high-low temperature performance of the rubber asphalt and properly reducing the high-temperature viscosity of the rubber asphalt, so that the modified asphalt has the characteristics of low cost, resource recycling, high viscosity, strong anti-aging capability, good construction workability and the like, realizes the proper utilization of waste tires, is economical and environment-friendly, and has important practical significance and engineering application value.
Comparative example 1: SBR modified asphalt
The comparative example shows an SBR modified asphalt prepared by adding SBR with the weight of 90# matrix asphalt to 90# matrix asphalt, wherein the low-temperature ductility of the SBR modified asphalt is very outstanding, and the SBR modified asphalt is directly provided by manufacturers.
The asphalt performance test results of this comparative example are shown in Table 1.
Comparative example 2: SBS modified asphalt
The comparative example shows a SBS modified asphalt, which is prepared by adding SBS with the weight of 4% of that of 90# matrix asphalt into 90# matrix asphalt, and is directly provided by manufacturers.
The asphalt performance test results of this comparative example are shown in Table 1.
Comparative example 3: waste rubber powder modified asphalt
The comparative example provides waste rubber powder modified asphalt which comprises the following raw materials in parts by weight: 82% of 90# matrix asphalt and 18% of waste rubber powder (40 meshes).
The asphalt performance test results of this comparative example are shown in Table 1.
Comparative example 4: polyethylene and rubber powder composite modified asphalt
The comparative example provides a polyethylene and rubber powder composite modified asphalt which comprises the following raw materials in parts by weight: 80.0% of 90# matrix asphalt, 18.0% of waste rubber powder (40 meshes) and 2.0% of polyethylene.
The asphalt performance test results of this comparative example are shown in Table 1.
Example 1A high viscosity composite modified asphalt
The embodiment provides the composite modified asphalt with the advantages of low cost, high resource recycling rate, high viscosity, strong ageing resistance, good construction workability and the like, which comprises the following raw materials in percentage by weight: the material consists of the following raw materials in parts by weight: 70.0% of sk90 matrix asphalt, 18.5% of waste rubber powder, 2.0% of acrylonitrile-butadiene-styrene copolymer, 1.7% of polycaprolactone, 1.2% of benzyl glycidyl ether 692, 0.7% of dicyclopentadiene, 0.9% of POE DF840, 3.0% of viscosity reducer, 2.0% of adhesion promoter and 100% of the sum of the weight percentages of the raw materials.
The matrix asphalt adopts sk90# matrix asphalt and can be replaced by other types of asphalt.
The waste rubber powder adopts 40 meshes, and can be replaced by other proper meshes, such as 20 meshes or 80 meshes.
The preparation method of the modified asphalt with the advantages of low cost, high resource recycling rate, high viscosity, strong aging resistance, good construction workability and the like comprises the following steps:
firstly, montmorillonite and absolute ethyl alcohol are added into a reaction bottle according to the mass ratio of 1:20, and are placed into a constant-temperature water bath kettle at 80 ℃ to be stirred for 1h at the high speed of 4000r/min under the ultrasonic condition. Dissolving N-oleoyl sodium N-methyl taurate surfactant with a certain amount of absolute ethanol, adding into a reaction bottle, and continuing ultrasonic stirring at high speed for 2h. The product after the reaction was filtered and washed with deionized water until no Cl-was detected with a 0.20mol/L AgNO3 solution. The product was dried in a vacuum oven at 100deg.C for 36h. Grinding and sieving to obtain organic modified montmorillonite, i.e. uniform mixture A.
Step two, a three-necked flask with a dropping funnel, a stirrer and a thermometer was charged with maleic anhydride, acrylamide, methyl alkenyl polyoxyethylene ether and mixture a. The reaction mixture was heated to the reaction temperature, added to potassium persulfate through a dropping funnel while adding the mixture under nitrogen protection for a predetermined time, and cooled to room temperature. The reaction mass cooled to room temperature was repeatedly rinsed with ethanol and the precipitate was then dried in vacuo at room temperature to give the final purified product. The dosage of the three monomers is changed to prepare the nano montmorillonite and polymer composite viscosity reducer with different grafting rates, namely the mixture B.
Step three, mixing chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin according to the ratio of 2:3:5, pouring a certain amount of chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin into a 100ml beaker, then placing the beaker filled with the mixture into a DF-101S constant temperature oil bath pot (manufactured by a pre-sublimation instrument) with the temperature raised to 80 ℃ for rapid heating, starting stirring, wherein the stirring speed is required to be increased from slow to fast to slow to a set reaction speed of 2500r/min, and finishing the organic modification of montmorillonite after the mixture reacts for 60min, thus obtaining a uniform mixture C.
Preheating sk90 matrix asphalt to 185 ℃ in a baking oven, adding the mixture B and the mixture C, stirring at a high speed for 90min at 180 ℃, adding acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride, polycaprolactone and benzyl glycidyl ether 692, dicyclopentadiene and POE DF840, and stirring for 30min at 180 ℃ with an electric stirrer at 3000r/min to obtain modified asphalt
The performance test results of the modified asphalt in the embodiment, which have the advantages of low cost, high resource recycling rate, high viscosity, strong aging resistance, good construction workability and the like, are shown in table 1.
Example 2: high-viscosity composite modified asphalt
The embodiment provides the high-viscosity composite modified asphalt which has the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong ageing resistance, good construction workability and the like, and comprises the following raw materials in parts by weight: 69.0% of sk90 matrix asphalt, 18.0% of waste rubber powder, 2.5% of acrylonitrile-butadiene-styrene copolymer, 2.0% of polycaprolactone, 1.4% of benzyl glycidyl ether 692, 0.7% of dicyclopentadiene, 0.9% of POE DF840, 3.0% of viscosity reducer, 2.0% of adhesion promoter and 100% of the sum of the weight percentages of the raw materials.
The requirements for the raw materials and the preparation method of this example are the same as in example 1.
The performance test results of the high-viscosity composite modified asphalt with the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong aging resistance, good construction workability and the like are shown in table 1.
Example 3: high-viscosity composite modified asphalt
The embodiment provides the high-viscosity composite modified asphalt which has the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong ageing resistance, good construction workability and the like, and comprises the following raw materials in parts by weight: 68.0% of sk90 matrix asphalt, 19.0% of waste rubber powder, 2.5% of acrylonitrile-butadiene-styrene copolymer, 2.0% of polycaprolactone, 1.0% of benzyl glycidyl ether 692, 1.0% of dicyclopentadiene, 1.0% of POE DF840, 3.0% of viscosity reducer, 2.0% of adhesion promoter and 100% of the sum of the weight percentages of the raw materials.
The requirements for the raw materials and the preparation method of this example are the same as in example 1.
The performance test results of the high-viscosity composite modified asphalt with the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong aging resistance, good construction workability and the like are shown in table 1.
Example 4: high-viscosity composite modified asphalt
The embodiment provides the high-viscosity composite modified asphalt which has the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong ageing resistance, good construction workability and the like, and comprises the following raw materials in parts by weight: 66.0% of sk90 matrix asphalt, 18.5% of waste rubber powder, 2.5% of acrylonitrile-butadiene-styrene copolymer, 2.0% of polycaprolactone, 1.3% of benzyl glycidyl ether 692, 1.0% of dicyclopentadiene, 1.0% of POE DF840, 4.0% of viscosity reducer, 2.2% of adhesion promoter and 100% of the sum of the weight percentages of the raw materials.
The requirements for the raw materials and the preparation method of this example are the same as in example 1.
The high-viscosity composite modified asphalt has the advantages of low manufacturing cost, high resource recycling rate, high viscosity, strong aging resistance, good construction workability and the like, and the performance test results are shown in table 1.
Testing the performance of the modified asphalt:
the samples of comparative examples 1 to 4 and the samples of examples 1 to 4 were subjected to performance tests as follows.
The test includes penetration, softening point, ductility (low temperature ductility, 5 ℃ C.) and Brookfield viscosity at 135 ℃ of the modified asphalt of the example sample and the comparative sample, and is specifically referred to JTG E20-2011, test procedure for Highway engineering asphalt and asphalt mixture.
As shown in Table 1, the penetration, softening point, low temperature ductility and viscosity test results of the examples of the present invention and the comparative samples are shown. From table 1, it can be seen that comparative example 1 (SBR modified asphalt) has a low softening point and viscosity, so that the high temperature stability of the asphalt pavement is poor, and the use requirement of the asphalt pavement is obviously not met; each index of comparative example 2 (SBS modified asphalt) is stable compared with comparative example 1, but the viscosity is lower and does not meet the requirement of the Brinell viscosity of 1.5-3.0 Pa at the standard 135 ℃, so that the road condition requirement of the high-temperature and rainy region of China cannot be met; from the performance parameters of comparative example 3 (rubber modified asphalt) and comparative example 4 (polyethylene and rubber powder), the effect of the single rubber blend on asphalt modification is poor, and the high temperature performance of asphalt is remarkably improved, but the low temperature performance of asphalt is poor. In addition, the viscosity of the rubber powder and the polyethylene composite modified asphalt is too high, the rubber powder and the polyethylene composite modified asphalt obviously exceed the standard requirements, the actual construction workability is seriously affected, the ductility is too low, and the low-temperature performance is poor. Compared with comparative examples 1-4, the 4 examples of the invention have the advantages that under the combined action of various modifiers and a plurality of materials, various indexes of the modified asphalt are obviously improved, so that the modified asphalt has higher softening point and certain ductility, the high-low temperature performance of the modified asphalt is obviously improved, and the viscosity also reaches a reasonable range without increasing the construction difficulty due to overhigh viscosity. Has stronger technical advantages in high-temperature and rainy areas with higher requirements on high-temperature performance of asphalt pavement.
Table 1 test results of various indexes of the modified asphalt of the example sample and the comparative example sample
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The composite modified high-viscosity asphalt is characterized by comprising the following raw materials:
SK90 matrix asphalt, waste rubber powder, acrylonitrile-butadiene-styrene copolymer, polycaprolactone, benzyl glycidyl ether 692, dicyclopentadiene and POE DF840, viscosity reducer, and adhesion promoter.
2. The composite modified high-viscosity asphalt according to claim 1, wherein: the preparation raw materials comprise 65.8 to 70.6 percent of sk90 matrix asphalt, 18.0 to 20.0 percent of waste rubber powder, 1.7 to 2.5 percent of acrylonitrile-butadiene-styrene copolymer, 1.5 to 2.0 percent of polycaprolactone, 1.0 to 1.5 percent of benzyl glycidyl ether 692, 0.5 to 1.0 percent of dicyclopentadiene, 0.7 to 1.0 percent of POE DF840, 3.0 to 5.0 percent of viscosity reducer and 2.0 to 3.0 percent of adhesion promoter.
3. The composite modified high-viscosity asphalt according to claim 2, wherein: the preparation raw materials comprise 70.0% of sk90 matrix asphalt, 18.5% of waste rubber powder, 2.0% of acrylonitrile-butadiene-styrene copolymer, 1.7% of polycaprolactone, 1.2% of benzyl glycidyl ether 692, 0.7% of dicyclopentadiene, 0.9% of POE DF840, 3.0% of viscosity reducer and 2.0% of adhesion promoter.
4. The composite modified high-viscosity asphalt according to claim 1, wherein the viscosity reducer adopts anionic surfactant N-oleoyl N-methyl taurine sodium to carry out organic modification on montmorillonite, and then three monomers of maleic anhydride, acrylamide and methyl alkenyl polyoxyethylene ether are selected under the condition that potassium persulfate is taken as an initiator to graft to form the nano montmorillonite and polymer composite viscosity reducer.
5. The composite modified high-viscosity asphalt according to claim 4, wherein the viscosity reducer is prepared by mixing the following raw materials in parts by weight: 3.0 to 5.0 percent of anionic surfactant N-oleoyl N-methyl taurine sodium, 45.6 to 50.8 percent of montmorillonite, 3.0 to 4.0 percent of potassium persulfate, 15.6 to 18.8 percent of maleic anhydride, 12.6 to 14.8 percent of acrylamide and 10.2 to 11.4 percent of methyl alkenyl polyoxyethylene ether.
6. The composite modified high-viscosity asphalt according to claim 5, wherein the viscosity reducer comprises the following raw materials in parts by weight: 4.0% of anionic surfactant N-oleoyl N-methyl taurine sodium, 48.6% of montmorillonite, 3.5% of potassium persulfate, 18.6% of maleic anhydride, 13.9% of acrylamide and 11.4% of methyl alkenyl polyoxyethylene ether. The sum of the weight portions of the raw materials is 100 percent.
7. The composite modified high-viscosity asphalt according to claim 1, wherein the adhesion promoter is prepared by mixing the following raw materials in parts by weight: chlorinated polyolefin, alkoxy functional silane oligomer, BH-403 epoxy resin.
8. The composite modified high-viscosity asphalt according to claim 7, wherein the adhesion promoter is prepared by mixing the following raw materials in parts by weight: 18 to 20 percent of chlorinated polyolefin, 25 to 30 percent of alkoxy functional group silane oligomer and 45 to 50 percent of BH-403 epoxy resin.
9. The composite modified high-viscosity asphalt according to claim 8, wherein the adhesion promoter comprises the following raw materials in parts by weight: 20% of chlorinated polyolefin, 30% of alkoxy functional silane oligomer and 50% of BH-403 epoxy resin.
10. A method for preparing composite modified high-viscosity asphalt, wherein the composite modified high-viscosity asphalt is the composite modified high-viscosity asphalt according to any one of claims 1 to 9, and is characterized by comprising the following steps:
s1: firstly, montmorillonite and absolute ethyl alcohol are added into a reaction bottle according to the mass ratio of 1:20, and are placed into a constant-temperature water bath kettle at 80 ℃ to be stirred for 1h at a high speed of 4000r/min under the ultrasonic condition; dissolving N-oleoyl N-methyl sodium taurate surfactant with a certain amount of absolute ethyl alcohol, adding into a reaction bottle, and continuing ultrasonic stirring for 2h at high speed; filtering and washing the reacted product with deionized water until no Cl-exists by using an AgNO3 solution with the concentration of 0.20 mol/L; drying the product in a vacuum drying oven at 100 ℃ for 36h; grinding and sieving to obtain organic modified montmorillonite, i.e. uniform mixture A;
s2: adding maleic anhydride, acrylamide, methyl alkenyl polyoxyethylene ether and the mixture A into a three-neck flask with a dropping funnel, a stirrer and a thermometer; heating the reaction mixture to a reaction temperature, adding potassium persulfate through a dropping funnel, simultaneously adding the potassium persulfate under the protection of nitrogen for reacting for a preset time, and cooling to room temperature; repeatedly washing the reactant cooled to room temperature with ethanol, and then drying the precipitate at room temperature in vacuum to obtain a final purified product; changing the dosage of the three monomers to prepare the nano montmorillonite and polymer composite viscosity reducer with different grafting rates, namely a mixture B;
s3: mixing chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin according to the ratio of 2:3:5, pouring a certain amount of chlorinated polyolefin, alkoxy functional silane oligomer and BH-403 epoxy resin into a 100ml beaker, then placing the beaker filled with the mixture into a DF-101S constant temperature oil bath pot (manufactured by a pre-sublimation instrument) with the temperature raised to 80 ℃ for rapid heating, starting stirring, wherein the stirring speed is required to be increased from slow to a set reaction speed of 2500r/min, and after the mixture reacts for 60min, finishing organic modification of montmorillonite to obtain a uniform mixture C;
s4, preheating sk90 matrix asphalt to 185 ℃ in an oven, adding the mixture B and the mixture C, stirring at a high speed at 180 ℃ for 90min, adding acrylonitrile-butadiene-styrene copolymer grafted maleic anhydride, polycaprolactone, benzyl glycidyl ether 692, dicyclopentadiene and POE DF840 according to the proportion, and stirring at 180 ℃ for 30min by using an electric stirrer at 3000r/min to obtain the modified asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310281859.3A CN116426135A (en) | 2023-03-22 | 2023-03-22 | Composite modified high-viscosity asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310281859.3A CN116426135A (en) | 2023-03-22 | 2023-03-22 | Composite modified high-viscosity asphalt and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116426135A true CN116426135A (en) | 2023-07-14 |
Family
ID=87084699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310281859.3A Pending CN116426135A (en) | 2023-03-22 | 2023-03-22 | Composite modified high-viscosity asphalt and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116426135A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443270A (en) * | 2010-10-11 | 2012-05-09 | 北京化工大学 | Asphalt modifier, modified asphalt containing the asphalt modifier and preparation method of the two |
| CN107722648A (en) * | 2016-08-12 | 2018-02-23 | 交通运输部公路科学研究所 | A kind of high-viscosity high-elasticity modified pitch and its preparation and application |
| CN108610644A (en) * | 2018-03-22 | 2018-10-02 | 中路高科(北京)公路技术有限公司 | A kind of dicyclopentadiene Type of Collective object modified pitch and preparation method thereof |
| CN109880384A (en) * | 2019-01-22 | 2019-06-14 | 长安大学 | A kind of composite modified high-viscosity asphalt of environment-friendly type and preparation method |
-
2023
- 2023-03-22 CN CN202310281859.3A patent/CN116426135A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443270A (en) * | 2010-10-11 | 2012-05-09 | 北京化工大学 | Asphalt modifier, modified asphalt containing the asphalt modifier and preparation method of the two |
| CN107722648A (en) * | 2016-08-12 | 2018-02-23 | 交通运输部公路科学研究所 | A kind of high-viscosity high-elasticity modified pitch and its preparation and application |
| CN108610644A (en) * | 2018-03-22 | 2018-10-02 | 中路高科(北京)公路技术有限公司 | A kind of dicyclopentadiene Type of Collective object modified pitch and preparation method thereof |
| CN109880384A (en) * | 2019-01-22 | 2019-06-14 | 长安大学 | A kind of composite modified high-viscosity asphalt of environment-friendly type and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Duan et al. | Research progress and performance evaluation of crumb-rubber-modified asphalts and their mixtures | |
| CN101531792A (en) | Low-expansion coefficient polyvinyl chloride alloy material and manufacturing method thereof | |
| CN105541212A (en) | Composite material toughened ceramisite concrete and preparation method thereof | |
| CN109880384A (en) | A kind of composite modified high-viscosity asphalt of environment-friendly type and preparation method | |
| CN112225491A (en) | Fiber-modified SMA-13 asphalt mixture with excellent long-term performance | |
| CN114804726B (en) | EME-14 high-modulus asphalt concrete and preparation method thereof | |
| CN111847973A (en) | Compound double-modified asphalt mixture additive | |
| CN105694239B (en) | A kind of discarded printed circuit boards non-metal powder/ternary ethlene propyene rubbercompound material and preparation method thereof | |
| CN1854200A (en) | Asphalt composition containing styrene-butadiene-styrene block copolymer having asymmetric polystyrene block | |
| CN114716839A (en) | Modified asphalt for heavy-duty pavement, modified asphalt mixture and preparation method thereof | |
| CN114656793A (en) | PPA (polyphthalamide) -based compounded high-toughness SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method thereof | |
| CN112745062A (en) | Composite fiber modified asphalt mixture with excellent performance and preparation method thereof | |
| CN116947376B (en) | Mineral fiber modified asphalt concrete and preparation method thereof | |
| CN116426135A (en) | Composite modified high-viscosity asphalt and preparation method thereof | |
| Jiang et al. | Preparation and evaluation of performance and mechanism of gallic acid–rubber powder–microalgae bio-oil/styrene block copolymers composite modified asphalt | |
| CN108676339A (en) | A kind of toughening lower shrinkage tubular molding compound and preparation method thereof | |
| CN103450398B (en) | Method for preparing fast vulcanized nitrile rubber by emulsion polymerization | |
| CN111087697A (en) | Long glass fiber reinforced polypropylene composite material with good adhesive property and preparation method thereof | |
| CN113265154B (en) | Modified emulsified asphalt and preparation method thereof | |
| CN114477925A (en) | High-low temperature resistant asphalt concrete and preparation method thereof | |
| CN101585977A (en) | Preparation method of polypropylene reinforced plasticized modifier | |
| CN110551383B (en) | Reinforced and toughened road rapid repair material and preparation method thereof | |
| CN104610767B (en) | A kind of method that utilization SBS g-sisal Fibers prepare sisal hemp modified pitch | |
| CN114179219B (en) | Preparation method of acidic aggregate asphalt concrete in plateau area and asphalt concrete | |
| CN116444200A (en) | Preparation method of regenerated basalt asphalt mixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |