CN118109059A - High-viscosity-toughness emulsified asphalt composition, preparation method and application thereof, and pavement treatment method - Google Patents
High-viscosity-toughness emulsified asphalt composition, preparation method and application thereof, and pavement treatment method Download PDFInfo
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- CN118109059A CN118109059A CN202410243104.9A CN202410243104A CN118109059A CN 118109059 A CN118109059 A CN 118109059A CN 202410243104 A CN202410243104 A CN 202410243104A CN 118109059 A CN118109059 A CN 118109059A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 134
- 239000000203 mixture Substances 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title abstract description 6
- -1 alkyl imidazoline Chemical compound 0.000 claims abstract description 35
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 29
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 29
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 29
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 29
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 26
- 239000003208 petroleum Substances 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 24
- 229920005989 resin Polymers 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 claims abstract description 22
- 239000011159 matrix material Substances 0.000 claims abstract description 20
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical class C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229920003048 styrene butadiene rubber Polymers 0.000 claims abstract description 16
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 24
- 239000008149 soap solution Substances 0.000 claims description 21
- 238000010008 shearing Methods 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 239000003921 oil Substances 0.000 claims description 12
- 235000019198 oils Nutrition 0.000 claims description 12
- 239000004575 stone Substances 0.000 claims description 11
- 235000012424 soybean oil Nutrition 0.000 claims description 9
- 239000003549 soybean oil Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
- 239000011707 mineral Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 230000035515 penetration Effects 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 11
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 10
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 7
- 150000007522 mineralic acids Chemical class 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 6
- 239000005639 Lauric acid Substances 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 description 5
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 4
- 239000011259 mixed solution Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920002748 Basalt fiber Polymers 0.000 description 3
- 238000006683 Mannich reaction Methods 0.000 description 3
- FACXGONDLDSNOE-UHFFFAOYSA-N buta-1,3-diene;styrene Chemical compound C=CC=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 FACXGONDLDSNOE-UHFFFAOYSA-N 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 150000003141 primary amines Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- ZDESIKLNPAKKBA-UHFFFAOYSA-N 2-(2-heptadecyl-4,5-dihydroimidazol-1-yl)ethanamine Chemical group CCCCCCCCCCCCCCCCCC1=NCCN1CCN ZDESIKLNPAKKBA-UHFFFAOYSA-N 0.000 description 1
- 229920002153 Hydroxypropyl cellulose Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000012206 bottled water Nutrition 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 239000008096 xylene Substances 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
Landscapes
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Materials 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 discloses a high-viscosity and toughness emulsified asphalt composition, a preparation method and application thereof, and a pavement treatment method. The high-viscosity tough emulsified asphalt composition comprises a component A and a component B; the component A comprises: 100 parts of matrix asphalt, 4.5 to 8 parts of hydrogenated styrene-butadiene block copolymer, 2 to 5 parts of styrene-isoprene-styrene block copolymer, 12 to 20 parts of hydrogenated petroleum resin and 4 to 10 parts of compatilizer; the component B comprises: 2 to 3 parts by weight of alkyl imidazoline emulsifier, 0.2 to 1.0 part by weight of carboxymethyl cellulose and 30 to 120 parts by weight of water; the pH of the component B is 1.5-2.5. The asphalt composition disclosed by the invention is high in stability, and high in softening point and ductility.
Description
Technical Field
The invention relates to a high-viscosity and toughness emulsified asphalt composition, a preparation method and application thereof, and a pavement treatment method.
Background
With the development of asphalt technology and the continuous penetration of low-carbon environment-friendly concepts, the normal-temperature maintenance construction technology based on emulsified asphalt is gradually paid attention to. The traditional hot-mix hot-paving asphalt mixture consumes a large amount of energy in the production and construction process, and generates a large amount of carbon emission, so that the emulsified asphalt can effectively remedy the defects.
CN117106314a discloses a block copolymer-nanocomposite modified emulsified asphalt, comprising modified asphalt and soap solution. The modified asphalt comprises the following substances in parts by mass: 100 to 120 parts of matrix asphalt, 6 to 16 parts of thermoplastic rubber modifier, 0.5 to 2 parts of phase change material, 0.3 to 1.5 parts of graphene, 1 to 4 parts of furfural extract oil and 1 to 5 parts of petroleum resin. The soap solution comprises the following substances in parts by mass: 100 parts of purified water, 5-20 parts of emulsifying agent, 0.1-2 parts of stabilizing agent and 0.1-3 parts of acid. The weight ratio of the modified asphalt to the soap solution is 1:0.2-0.7. The emulsified asphalt has poor stability.
CN103740118a discloses a sprinkling type SBS emulsified modified asphalt, which is prepared by mixing a material A and a material B according to the weight ratio of 60-70% to 30-40% and shearing by a colloid mill, wherein the material A is prepared from the following raw materials in parts by weight: 3-5 parts of furfural extract oil, 3-4 parts of styrene-butadiene-styrene block copolymer and 91-94 parts of asphalt. The material B is prepared from the following raw materials in parts by weight: 2 to 3 parts of cetyl trimethyl ammonium bromide, 95 to 96 parts of water and 2 to 2.5 parts of cationic neoprene latex. The emulsified asphalt has poor stability.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an asphalt composition having high stability, a high softening point and a high ductility. It is another object of the present invention to provide a method for preparing an asphalt composition. It is a further object of the present invention to provide the use of an organic composition which is capable of increasing the stability, softening point and ductility of asphalt compositions. Still another object of the present invention is to provide a pavement treatment method, which has a high friction coefficient, a high adhesive strength and a high water resistance.
The above object is achieved by the following scheme.
In one aspect, the present invention provides a high tack tough emulsified asphalt composition comprising: a component A and a component B;
the component A comprises:
the component B comprises:
2 to 3 parts by weight of alkyl imidazoline emulsifier,
Carboxymethyl cellulose 0.2-1.0 weight parts, and
30-120 Parts of water;
the pH of the component B is 1.5-2.5.
The asphalt composition according to the present invention, preferably, the penetration of the base asphalt is 50 to 100dmm; the molecular weight of the hydrogenated petroleum resin is 300-3000, and the softening point is 80-110 ℃; the compatilizer is one or more selected from furfural extract oil and epoxidized soybean oil.
According to the asphalt composition of the present invention, preferably, the aromatic hydrocarbon content of the furfural extract oil is not less than 85%, and the kinematic viscosity at 100 ℃ is 25 to 50cSt; the epoxy value of the epoxidized soybean oil is not less than 6%, and the viscosity at 25 ℃ is not more than 300 mPa.s.
The bitumen composition according to the present invention preferably has a viscosity of 600 to 1400 mPa.s and a pH of 6 to 8 in an aqueous carboxymethyl cellulose solution containing 2wt% of said carboxymethyl cellulose.
The asphalt composition according to the present invention preferably further comprises an inorganic acid selected from one or more of hydrochloric acid and sulfuric acid in the B component.
In another aspect, the present invention provides a method for preparing the above asphalt composition, comprising the steps of:
And shearing the modified asphalt formed by the component A and the soap solution formed by the component B for 0.5 to 5 minutes under the condition of the shearing rate of 2000 to 5000r/min to obtain the asphalt composition.
The preparation method according to the present invention preferably further comprises the steps of:
adding hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated petroleum resin and compatilizer into molten matrix asphalt, and shearing and stirring to obtain modified asphalt; and/or
And uniformly dispersing the alkyl imidazoline emulsifier, the carboxymethyl cellulose and the water to obtain the soap solution.
In yet another aspect, the present invention provides the use of an organic composition comprising 2 to 3 parts by weight of an alkyl imidazoline emulsifier and 0.2 to 1.0 parts by weight of carboxymethyl cellulose to improve the performance of an asphalt composition;
the properties of the asphalt composition include stability and at least one property selected from the group consisting of:
(A) The softening point of the material is determined,
(B) Ductility.
The use according to the invention preferably comprises the steps of:
(A) Adding hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated petroleum resin and compatilizer into molten matrix asphalt, and shearing and stirring to obtain modified asphalt;
(B) Uniformly dispersing an alkyl imidazoline emulsifier, carboxymethyl cellulose and water to obtain soap solution;
(C) And shearing the modified asphalt and the soap solution to obtain the asphalt composition.
In yet another aspect, the present invention provides a pavement treatment method, comprising the steps of:
(1) Uniformly mixing the asphalt composition, the I-shaped broken stone and the fibers, and paving the mixture on a pavement to be maintained, so as to form a first structural layer on the pavement to be maintained;
(2) A second structural layer is formed on the first structural layer by spreading type II crushed stone and then spreading the asphalt composition described above.
The asphalt composition provided by the invention has higher stability, higher softening point and ductility and good performance.
Detailed Description
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited thereto.
< Asphalt composition >
The asphalt composition of the present invention comprises component a and component B. In certain embodiments, the asphalt composition consists of component a and component B. The asphalt composition of the present invention can be obtained from the component A and the component B by shearing and stirring. Component A and component B are described in detail below.
Component A
Component a of the present invention includes a base asphalt, a hydrogenated styrene-butadiene block copolymer (SEBS), a styrene-isoprene-styrene block copolymer (SIS), a hydrogenated petroleum resin, and a compatibilizer. In certain embodiments, component a consists of the above materials.
The penetration of the matrix asphalt of the invention can be 50-100 dmm; preferably 60 to 75dmm. The matrix asphalt of the present invention may be one or more of No. 70 asphalt and No. 90 asphalt. According to one embodiment of the invention, the matrix asphalt is No. 70 asphalt.
The hydrogenated styrene-butadiene block copolymer may be referred to simply as "SEBS". The hydrogenated styrene-butadiene block copolymer may be a hydrogenated styrene-butadiene block copolymer of the brand YH-503 produced by Baling petrochemical company, inc. of China petrochemical group asset management.
The hydrogenated styrene-butadiene block copolymer is used in an amount of 4.5 to 8 parts by weight based on 100 parts by weight of the base asphalt; preferably 5 to 7 parts by weight; more preferably 5 to 6 parts by weight.
The styrene-isoprene-styrene block copolymer may be simply referred to as "SIS". The styrene-isoprene-styrene block copolymer can be 1209 styrene-isoprene-styrene block copolymer produced by Baling petrochemical company, china petrochemical company, limited.
Based on 100 parts by weight of matrix asphalt, the using amount of the styrene-isoprene-styrene block copolymer is 2-5 parts by weight; preferably 2 to 4 parts by weight; more preferably 2 to 3 parts by weight.
The molecular weight of the hydrogenated petroleum resin may be 300 to 3000. The softening point may be 80 to 110 ℃. The hydrogenated petroleum resin can be C5 hydrogenated petroleum resin or C9 hydrogenated petroleum resin. The hydrogenated petroleum resin can be made into Puyang Hengtai petrochemical Co., ltdHydrogenated petroleum resin of H9-90.
The dosage of the hydrogenated petroleum resin can be 12 to 20 weight parts based on 100 weight parts of matrix asphalt; preferably 14 to 18 parts by weight; more preferably 15 to 16 parts by weight.
The compatilizer can be one or more selected from furfural extract oil and epoxidized soybean oil. In certain embodiments, the compatibilizer is furfural extract oil. The aromatic hydrocarbon content of the furfural extract oil is not less than 85 percent, and the kinematic viscosity at 100 ℃ is 25 to 50cSt. The furfural extract oil can be produced by Shandong Tai petrochemical technology Co. In certain embodiments, the phase solvent is epoxidized soybean oil. The epoxy value of the epoxidized soybean oil is not less than 6% and the viscosity at 25 ℃ is not more than 300 mPa.s. The epoxidized soybean oil can be epoxidized soybean oil produced by Shandong chemical industry Co., ltd.
Based on 100 parts by weight of matrix asphalt, the amount of the compatilizer can be 4-10 parts by weight; preferably 5 to 8 parts by weight; more preferably 6 to 7 parts by weight.
Component B
Component B of the present invention comprises an alkyl imidazoline emulsifier, carboxymethyl cellulose, and water. The pH of the component B is 1.5-2.5; preferably, the pH is 2. In certain embodiments, component B further comprises a mineral acid. The mineral acid adjusts component B to the appropriate pH. Preferably, component B consists of an alkyl imidazoline emulsifier, carboxymethyl cellulose, an inorganic acid, and water.
The alkyl imidazoline emulsifier of the invention can be prepared by the following method: (1) Lauric acid and tetraethylenepentamine are reacted to obtain a reaction product. (2) And (3) cyclizing the reaction product to obtain the long-chain alkyl imidazoline. (3) And (3) carrying out a Mannich reaction on the long-chain alkyl imidazoline in the presence of formaldehyde and acetone to obtain the alkyl imidazoline emulsifier.
In the step (1), the molar ratio of lauric acid to tetraethylenepentamine is 1 (1-2); preferably 1 (1.05-1.5).
Lauric acid and tetraethylenepentamine may be reacted in the presence of xylene. After the reaction of lauric acid and tetraethylenepentamine is completed, the dimethylbenzene is distilled off, so that a reaction product is obtained.
Step (2) reacting under the pressure of 0.05-0.1 MPa; preferably, the reaction is carried out under a pressure of 0.07 to 0.09 MPa.
The reaction temperature in the step (2) can be 200-250 ℃; preferably 220 to 230 ℃.
In the step (3), the molar ratio of formaldehyde, acetone and long-chain alkyl imidazole may be (0.8 to 1.5): (0.8-1.5): 1, a step of; preferably (1 to 1.2): (1-1.2): 1. formaldehyde and acetone may be titrated into a reaction vessel containing long chain alkyl imidazolines.
The reaction temperature in the step (3) can be 60-90 ℃; preferably 70 to 80 ℃. The reaction time can be 2-10 h; preferably 3 to 7 hours. Step (3) may be performed under heated reflux conditions.
Primary amine can be methylated through Mannich reaction, so that a long-chain alkyl imidazoline grafted modified product is obtained.
The alkyl imidazoline emulsifier may be used in an amount of 2 to 3 parts by weight based on 100 parts by weight of the base asphalt; preferably 2.2 to 2.5 parts by weight; more preferably 2.4 to 2.5 parts by weight.
The carboxymethyl cellulose solution with concentration of 2wt% formed by the carboxymethyl cellulose and water has viscosity of 600-1400 mPa.s and pH value of 6-8. In certain embodiments, the carboxymethyl cellulose may be a carboxymethyl cellulose manufactured by Shanghai Ala Biochemical technologies Co., ltd. Under the trade designation C501052.
Based on 100 parts by weight of matrix asphalt, the dosage of the carboxymethyl cellulose can be 0.2 to 1.0 part by weight; preferably 0.3 to 0.6 parts by weight; more preferably 0.3 to 0.4 parts by weight.
The water may be selected from distilled water, potable water, tap water. The pH of the water may be from 6 to 8. Based on 100 parts by weight of matrix asphalt, the water consumption can be 30-120 parts by weight; preferably 40 to 80 parts by weight; more preferably 40 to 50 parts by weight.
The inorganic acid may be selected from one or more of hydrochloric acid and sulfuric acid. In certain embodiments, the mineral acid is hydrochloric acid. The inorganic acid may be an aqueous solution of an inorganic acid. The concentration of the aqueous mineral acid solution may be 30 to 38%. In certain embodiments, the concentration of the aqueous mineral acid is 37%. The amount of the inorganic acid aqueous solution can be 2 to 6 parts by weight based on 100 parts by weight of the matrix asphalt; preferably 4 to 5 parts by weight.
< Process for producing asphalt composition >
The preparation method of the asphalt composition comprises the following steps: the modified asphalt formed from component A and the soap solution formed from component B are sheared to obtain an asphalt composition.
The shear rate can be 2000-5000 r/min; preferably 3000-4000 r/min; more preferably 3500 to 4000r/min. The shearing time can be 0.5-5 min; preferably 1 to 4 minutes; more preferably 2 to 3 minutes.
The temperature of the modified asphalt can be 160-180 ℃; preferably 165 to 175 ℃.
In certain embodiments, the method further comprises the step of preparing the modified asphalt and/or preparing the soap solution. The following is a detailed description.
Step of preparing modified asphalt
Adding the hydrogenated styrene-butadiene block copolymer, the styrene-isoprene-styrene block copolymer, the hydrogenated petroleum resin and the compatilizer into the molten matrix asphalt, and shearing and stirring to obtain the modified asphalt.
The temperature of the matrix asphalt in a molten state can be 120-160 ℃; preferably 130 to 150 ℃.
Step of preparing soap solution
And uniformly dispersing the alkyl imidazoline emulsifier, the carboxymethyl cellulose and the water to obtain the soap solution. Specifically, an alkyl imidazoline emulsifier and carboxymethyl cellulose are dispersed in water to form a mixed solution. The temperature of the mixed solution is regulated to 50-80 ℃; preferably 60-70 ℃, and then adding inorganic acid into the mixed solution to obtain soap solution.
< Use of organic composition >
The organic compositions of the present invention are capable of increasing the stability, softening point and/or ductility of asphalt compositions. Accordingly, the present invention provides the use of an organic composition for improving the properties of a bitumen composition, the properties of said bitumen composition comprising stability and at least one property selected from the group consisting of: softening point (A) and ductility (B).
The organic composition of the present invention comprises 2 to 3 parts by weight of an alkyl imidazoline emulsifier and 0.2 to 1.0 parts by weight of carboxymethyl cellulose. Preferably, the alkyl imidazoline emulsifier is used in an amount of preferably 2.2 to 2.5 parts by weight; more preferably 2.4 to 2.5 parts by weight. Preferably, the carboxymethyl cellulose is used in an amount of 0.3 to 0.6 parts by weight; more preferably 0.3 to 0.4 parts by weight.
Specifically, the method comprises the following steps: (A) Adding hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated petroleum resin and compatilizer into molten matrix asphalt, and shearing and stirring to obtain modified asphalt; (B) Uniformly dispersing an alkyl imidazoline emulsifier, carboxymethyl cellulose and water to obtain soap solution; (C) And shearing the modified asphalt and the soap solution to obtain the asphalt composition. The raw materials and the amounts thereof, as well as the specific steps, are as described above, and are not described in detail herein.
< Method of treating pavement >
The pavement treatment method of the invention comprises the following steps: (1) a step of forming a first structural layer; and (2) a step of forming a second structural layer. The following is a detailed description.
Step of forming a first structural layer
And uniformly mixing the asphalt composition, the I-shaped broken stone and the fibers, and paving the mixture on a pavement to be cured, thereby forming a first structural layer on the pavement to be cured. The asphalt composition is as described above and will not be described in detail herein.
The pavement to be cured can be a pretreated pavement. The surface of the pavement to be maintained can be leveled by pretreatment. Methods of pretreatment include, but are not limited to, crack pouring, rut repair, pit repair, and the like. These methods are common in the art and are not described in detail herein.
The particle size of the I-shaped crushed stone can be 3-5 mm. The amount of type I crushed stone may be 100 parts by weight.
The asphalt composition may be used in an amount of 10 to 20 parts by weight; preferably 12 to 18 parts by weight; more preferably 14 to 16 parts by weight.
The fibers may be selected from one or more of polyester fibers, basalt fibers, lignin fibers, glass fibers. In certain embodiments, the fibers are basalt fibers. The length of the fibers may be 50 to 70mm.
The amount of the fiber may be 0.1 to 0.8 parts by weight; preferably 0.2 to 0.7 parts by weight; more preferably 0.3 to 0.5 parts by weight.
In certain embodiments, the well-mixed asphalt composition, type I macadam, and fibers are subjected to curing after being spread on the pavement to be cured. The health preserving time can be 60-100 min; preferably 70 to 90 minutes.
Step of forming a second structural layer
A second structural layer is formed on the first structural layer by spreading type II crushed stone and then spreading the asphalt composition. The asphalt composition is as described above and will not be described in detail herein.
The particle size of the II-type broken stone can be less than or equal to 3mm. The dispersion amount of the II-type broken stone can be 1-6 kg/m 2; preferably 2 to 5kg/m 2.
The asphalt composition may be dispersed in an amount of 0.5 to 3kg/m 2; preferably 1 to 2kg/m 2.
In certain embodiments, the method further comprises the steps of: after the asphalt composition is completely dispersed, rolling by using a rubber wheel, and then removing the floating particles. And forming a second structural layer on the first structural layer through curing. The health preserving time can be 60-100 min; preferably 70 to 90 minutes.
The following raw materials are introduced:
Matrix asphalt: pitch No. 70, penetration 68dmm.
Hydrogenated styrene-butadiene Block copolymer (SEBS) was sold under the trademark YH-503 by Baling petrochemical company, inc. of asset management of China petrochemical company.
Styrene-isoprene-styrene block copolymer (SIS) grade 1209, purchased from the paling petrochemical company, a company of the China petrochemical group asset management Limited.
The hydrogenated petroleum resin is C9 hydrogenated petroleum resin with the brand number ofH9-90, purchased from Puyang Hengtai petrochemical Co.
Furfural extraction oil was purchased from Shandong Tai Chemicals, inc.
The alkyl imidazoline emulsifier is prepared by the following method: the molar ratio was set to 1:1.05 lauric acid and tetraethylenepentamine are added into a reactor, then dimethylbenzene is added, heating, stirring and reflux are carried out, and dimethylbenzene is distilled off after reaction, thus obtaining a reaction product. And regulating the reaction system to the pressure of 0.086MPa and the temperature of 220 ℃ to carry out cyclization reaction on the reaction product, thus obtaining the long-chain alkyl imidazoline. Titrating formaldehyde and acetone into a three-neck flask filled with long-chain alkyl imidazoline, carrying out reflux reaction for 5 hours at 75 ℃, and carrying out Mannich reaction to methylate primary amine to prepare an alkyl imidazoline emulsifier; the molar ratio of formaldehyde, acetone and long-chain alkyl imidazole is 1:1:1.
Carboxymethyl cellulose is available under the trade designation C501052 from Shanghai Ala Biochemical technologies Co., ltd.
The fiber is basalt fiber, and the length of the fiber is 50-70 mm.
The particle size of the I-shaped broken stone is 3-5 mm.
The particle size of the II-type broken stone is less than or equal to 3mm.
The test method is described as follows:
the properties of the asphalt composition were tested according to the methods specified in JTG E20-2011, highway engineering asphalt and asphalt mixture testing procedure.
Example 1
100 Parts by weight of the base asphalt was heated to 140℃to obtain a molten base asphalt. 5 parts by weight of a hydrogenated styrene-butadiene block copolymer (SEBS), 2 parts by weight of a styrene-isoprene-styrene block copolymer (SIS), 15 parts by weight of a hydrogenated petroleum resin and 6 parts by weight of a furfural extract oil were added to a molten matrix asphalt, and the mixture was sheared and stirred to obtain a modified asphalt.
Sequentially adding 2.5 parts by weight of alkyl imidazoline emulsifier and 0.3 part by weight of carboxymethyl cellulose into 20 parts by weight of water at 25 ℃ for uniform dispersion, and then mixing with 20 parts by weight of water to obtain a mixed solution. The temperature of the mixture was adjusted to 65℃and then 4 parts by weight of hydrochloric acid having a concentration of 37% by weight was added to the mixture to obtain a soap solution having a pH of 2.
And sequentially adding the soap solution and the modified asphalt at 170 ℃ into an emulsified asphalt colloid mill, and shearing the soap solution and the modified asphalt for 2min under the condition that the shearing rate is 3500r/min to obtain an asphalt composition.
The properties of the bitumen compositions are shown in Table 1.
Comparative example 1
Example 1 was repeated except that the hydrogenated styrene-butadiene block copolymer (SEBS) was used in an amount of 4 parts by weight and the styrene-isoprene-styrene block copolymer (SIS) was used in an amount of 1.5 parts by weight. The properties of the bitumen compositions are shown in Table 1.
Comparative example 2
Example 1 was repeated except that 10 parts by weight of hydrogenated petroleum resin was used. The properties of the bitumen compositions are shown in Table 1.
Comparative example 3
Example 1 was repeated except that the amount of the compatibilizer was 2 parts by weight. The properties of the bitumen compositions are shown in Table 1.
Comparative example 4
Example 1 was repeated except that the alkyl imidazoline emulsifier was used in an amount of 1.5 parts by weight. The properties of the bitumen compositions are shown in Table 1.
Comparative example 5
Example 1 was repeated except that carboxymethyl cellulose was used in an amount of 0.1 part by weight. The properties of the bitumen compositions are shown in Table 1.
Comparative example 6
Example 1 was repeated except that 10 parts by weight of hydrochloric acid was used. The properties of the bitumen compositions are shown in Table 1.
Comparative example 7
Example 1 was repeated except that the hydrogenated petroleum resin was replaced with a petroleum resin. The properties of the bitumen compositions are shown in Table 1.
Comparative example 8
Example 1 was repeated except that the alkyl imidazoline emulsifier was replaced with 1-aminoethyl-2-heptadecyl imidazoline. The properties of the bitumen compositions are shown in Table 1.
Comparative example 9
Example 1 was repeated except that the alkyl imidazoline emulsifier was replaced with cetyl trimethylammonium bromide. The properties of the bitumen compositions are shown in Table 1.
Comparative example 10
Example 1 was repeated except that carboxymethyl cellulose was replaced with hydroxypropyl cellulose. The properties of the bitumen compositions are shown in Table 1.
Comparative example 11
Example 1 was repeated except that the hydrogenated styrene-butadiene block copolymer (SEBS) and the styrene-isoprene-styrene block copolymer (SIS) were replaced with 8 parts by weight of styrene-butadiene-styrene (SBS). The properties of the bitumen compositions are shown in Table 1.
TABLE 1
Example 2
And (3) carrying out crack pouring, rut repairing and pit repairing on the pavement to be maintained so as to make the surface of the pavement to be maintained flat and obtain the pretreated pavement.
The asphalt composition, the type I macadam and the fibers of the embodiment 1 with the mass ratio of 14:100:0.3 are mixed and stirred uniformly, then are paved on a pretreated pavement, and are cured for 80 minutes, so that a first structural layer is formed on the pretreated pavement.
The asphalt composition of example 1 was spread on the first structural layer at a spread of 4kg/m 2 and then at a spread of 1kg/m 2. After the asphalt composition is completely dispersed, rolling by using a rubber wheel, and then removing the floating particles. After the health maintenance is carried out for 80 minutes, a second structural layer is formed on the first structural layer, and the traffic can be opened.
The road surface properties are shown in table 2.
TABLE 2
| Test item | Technical requirements | Detection value | Detection method |
| Pendulum friction coefficient, BPN | ≥60 | 72 | T0964 |
| Bond strength with asphalt pavement, MPa | ≥0.5 | 1.1 | T0985 |
| Water permeability coefficient, ml/min | ≤120 | Water-impermeable | T0971 |
Note that: technical requirements are determined according to JTG 3450-2019 on-site test procedure for highway subgrade and road surface
The present invention is not limited to the above-described embodiments, and any modifications, improvements, substitutions, and the like, which may occur to those skilled in the art, fall within the scope of the present invention without departing from the spirit of the invention.
Claims (10)
1. A high-viscosity-toughness emulsified asphalt composition, which is characterized by comprising a component A and a component B;
the component A comprises:
the component B comprises:
2 to 3 parts by weight of alkyl imidazoline emulsifier,
Carboxymethyl cellulose 0.2-1.0 weight parts, and
30-120 Parts of water;
the pH of the component B is 1.5-2.5.
2. The high tack emulsified asphalt composition of claim 1, wherein the penetration of the base asphalt is 50 to 100dmm; the molecular weight of the hydrogenated petroleum resin is 300-3000, and the softening point is 80-110 ℃; the compatilizer is one or more selected from furfural extract oil and epoxidized soybean oil.
3. The high-viscosity tough emulsified asphalt composition according to claim 2, wherein the aromatic hydrocarbon content of the furfural extract oil is not less than 85%, and the kinematic viscosity at 100 ℃ is 25 to 50cSt; the epoxy value of the epoxidized soybean oil is not less than 6%, and the viscosity at 25 ℃ is not more than 300 mPa.s.
4. The high-viscosity and tough emulsified asphalt composition according to claim 1, wherein the aqueous carboxymethyl cellulose solution containing 2wt% of the carboxymethyl cellulose has a viscosity of 600 to 1400 mPa-s and a pH of 6 to 8.
5. The high tack emulsified asphalt composition of claim 1, wherein the B component further comprises a mineral acid selected from one or more of hydrochloric acid and sulfuric acid.
6. The method for producing a high-viscosity-toughness emulsified asphalt composition according to any one of claims 1 to 5, comprising the steps of:
And shearing the modified asphalt formed by the component A and the soap solution formed by the component B for 0.5 to 5 minutes under the condition of the shearing rate of 2000 to 5000r/min to obtain the asphalt composition.
7. The method of manufacturing according to claim 6, further comprising the step of:
adding hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated petroleum resin and compatilizer into molten matrix asphalt, and shearing and stirring to obtain modified asphalt; and/or
And uniformly dispersing the alkyl imidazoline emulsifier, the carboxymethyl cellulose and the water to obtain the soap solution.
8. Use of an organic composition for improving the performance of an asphalt composition, characterized in that the organic composition comprises 2 to 3 parts by weight of an alkyl imidazoline emulsifier and 0.2 to 1.0 parts by weight of carboxymethyl cellulose;
the properties of the asphalt composition include stability and at least one property selected from the group consisting of:
(A) The softening point of the material is determined,
(B) Ductility.
9. Use according to claim 8, characterized in that it comprises the following steps:
(A) Adding hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene block copolymer, hydrogenated petroleum resin and compatilizer into molten matrix asphalt, and shearing and stirring to obtain modified asphalt;
(B) Uniformly dispersing an alkyl imidazoline emulsifier, carboxymethyl cellulose and water to obtain soap solution;
(C) And shearing the modified asphalt and the soap solution to obtain the asphalt composition.
10. A pavement treatment method, characterized by comprising the steps of:
(1) Uniformly mixing the high-viscosity tough emulsified asphalt composition, the type I macadam and the fibers according to any one of claims 1 to 5, and paving the mixture on a pavement to be maintained, so as to form a first structural layer on the pavement to be maintained;
(2) Distributing type II crushed stone over the first structural layer and then distributing the asphalt composition of any one of claims 1 to 5, thereby forming a second structural layer over the first structural layer.
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