CN110066523B - Modified emulsified asphalt and preparation method thereof - Google Patents
Modified emulsified asphalt and preparation method thereof Download PDFInfo
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- CN110066523B CN110066523B CN201910439397.7A CN201910439397A CN110066523B CN 110066523 B CN110066523 B CN 110066523B CN 201910439397 A CN201910439397 A CN 201910439397A CN 110066523 B CN110066523 B CN 110066523B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses a modified emulsified asphalt and a preparation method thereof, wherein the preparation method comprises the following steps: (1) heating water to 70-90 ℃, then sequentially adding polyvinyl alcohol, talcum powder, ethanol, an antioxidant, a cationic emulsifier, tall oil and polyacrylamide, stirring and mixing for 5-15min at the rotation speed of 200-one-time stirring at 500r/min, then adding matrix asphalt and thermoplastic styrene butadiene rubber, heating to 125-one-time stirring at 175 ℃, stirring and mixing for 10-30min at the rotation speed of 200-one-time stirring at 500r/min, and obtaining a mixture; (2) shearing and dispersing the mixture at the rotation speed of 1000-. According to the modified emulsified asphalt disclosed by the invention, the bonding capacity of the modified emulsified asphalt is improved by adopting the modified emulsified asphalt prepared by reasonably proportioning the raw materials; the modified emulsified asphalt disclosed by the invention has good stability and oxidation resistance, improves the mechanical property and the anti-rutting capability of the asphalt, has good weather resistance, and can adapt to severe environments; the preparation method of the modified emulsified asphalt has the advantages of simple operation, wide raw material source and low cost.
Description
Technical Field
The invention relates to the technical field of asphalt, in particular to modified emulsified asphalt and a preparation method thereof.
Background
With the rapid development of national economy, the traffic volume of highway roads and urban roads is increased, vehicles are overweight increasingly, the abrasion and damage to the road surfaces are greatly increased compared with the prior art, and the highway is damaged early in the service life. The road surface sealing layer which is directly contacted with the vehicle is usually damaged firstly, and the problems of road surface damage such as cracking, longitudinal cracks, looseness, wave upheaval, rutting and the like occur, and if the maintenance is not carried out in time, the service performance and the service life of the road surface are influenced. At present, the pavement sealing layer repairing materials mainly comprise hot asphalt and emulsified asphalt, but the hot asphalt wastes energy sources, pollutes the environment and is inconvenient to construct; the emulsified asphalt has the advantages of economy, environmental protection, convenient construction and the like, and has been widely used in new roads and old road maintenance projects in recent years. Compared with common emulsified asphalt, the SBS modified emulsified asphalt is used as a special binding material in an adhesive layer and a sealing layer of a newly-repaired road, an interlayer and surface treatment in the reconstruction and maintenance of an old road and various introduction technologies, and can meet the requirements of modern traffic on high speed and heavy load.
Cyan is a product of crude oil processing, is a black or blackish brown viscous liquid or solid at normal temperature, mainly contains soluble trichloro olefin derivatives, and the properties and composition of the trichloro olefin derivatives vary with the source and the production method. Asphalt is a black-brown complex mixture composed of hydrocarbons with different molecular weights and nonmetallic derivatives thereof, and is one of high-viscosity organic liquids. Asphalt is widely used in civil engineering as a waterproof, moistureproof and anticorrosive organic cementing material. Since the reform was open, as the economy of China keeps increasing at high speed and the road mileage is increasing, asphalt as a pavement structure cementing material is also increasingly applied to road engineering.
The emulsified asphalt is liquid asphalt which is produced by asphalt and emulsifier under the action of a certain process. The emulsified asphalt is classified into cationic emulsified asphalt, anionic emulsified asphalt and nonionic emulsified asphalt. The asphalt particles of the cation emulsified asphalt have positive charges, and the anion emulsified asphalt particles have negative charges. When the cation emulsified asphalt is contacted with the surface of the aggregate, the charges are different, so that opposite attraction is generated, and asphalt particles can be coated on the surface of the aggregate in the presence of a water film, and the adsorption and the combination can be still good.
Emulsified asphalt provides a system which is safer, energy-saving and environment-friendly than hot asphalt, but with the development of social urbanization, science and technology and humanization, people have higher and higher requirements on asphalt, and the existing asphalt cannot meet the use requirements and is to be further improved.
Disclosure of Invention
The invention aims to make up for the defects of the prior art and provides modified emulsified asphalt and a preparation method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of modified emulsified asphalt comprises the following steps:
(1) heating water to 70-90 ℃, then sequentially adding polyvinyl alcohol, talcum powder, ethanol, cationic emulsifier, tall oil and polyacrylamide, stirring and mixing for 5-15min at the rotation speed of 200-500r/min, then adding matrix asphalt and thermoplastic styrene butadiene rubber, heating to 125-175 ℃, stirring and mixing for 10-30min at the rotation speed of 200-500r/min, and obtaining a mixture;
(2) shearing and dispersing the mixture at the rotation speed of 1000-.
A preparation method of modified emulsified asphalt comprises the following steps:
(1) heating 90-110 parts by weight of water to 70-90 ℃, then sequentially adding 3-7 parts by weight of polyvinyl alcohol, 2-7 parts by weight of modified talcum powder, 2-6 parts by weight of ethanol, 0.2-1.5 parts by weight of antioxidant, 1-2 parts by weight of cationic emulsifier, 0.02-0.06 part by weight of tall oil and 0.5-1.5 parts by weight of polyacrylamide, stirring and mixing for 5-15min at the rotation speed of 200-500r/min, then adding 95-105 parts by weight of matrix asphalt and 3-7 parts by weight of thermoplastic styrene butadiene rubber, heating to the temperature of 175 ℃ of 125-180 ℃ and stirring and mixing for 10-30min at the rotation speed of 200-500r/min to obtain a mixture;
(2) shearing and dispersing the mixture at the rotation speed of 1000-.
The matrix asphalt is at least one of natural asphalt, petroleum asphalt, coal tar asphalt and oil sand asphalt.
The all-weather aging of the road asphalt mainly comprises oxidation aging, volatile matter attenuation, physical hardening, water aging and the like, and the aging degree and the aging type are closely related to the chemical composition and the structure type. The factors which can cause the asphalt aging mainly include temperature, oxygen, illumination, water and the like or the combination of the factors.
The cationic emulsifier is at least one of cetyl trimethyl ammonium chloride, cetyl trimethyl ammonium bromide and octadecyl dimethyl hydroxyethyl ammonium chloride.
In order to improve the all-weather aging resistance of the road asphalt, besides selecting crude oil suitable for producing high-quality asphalt materials, some technological measures such as shallow oxidation, solid storage, nitrogen protection and the like are also adopted, but the measures have limited effect on improving the all-weather aging resistance of the road asphalt materials, so that the method for improving the all-weather aging resistance of the asphalt by using the additive becomes an important way.
The antioxidant is at least one of p-methyl phenol-dicyclopentadiene styrenated antioxidant resin and 3,3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant. Further, the antioxidant is prepared from p-methylphenol-dicyclopentadiene styrenated antioxidant resin, 3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant according to the mass ratio of (1-2): 1.
The polyacrylamide is nonionic polyacrylamide.
The preparation method of the modified talcum powder comprises the following steps: weighing 20-30g of talcum powder and 40-60g of 3-mercaptopropyltriethoxysilane, adding the talcum powder and the 3-mercaptopropyltriethoxysilane into 1100g of 900-fold water, uniformly mixing, adjusting the pH to 2-5 by using 0.1-0.5mol/L hydrochloric acid, stirring for 10-20h at the temperature of 75-95 ℃ and the rotating speed of 500-fold water at 900r/min, then carrying out centrifugal separation, washing for 1-3 times by using water, and drying to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], liquid phosphite ester antioxidant and dimethylbenzene according to the mass ratio of 1: (0.4-0.6): (0.05-0.15): (1-3) uniformly mixing to obtain a mixed solution; ball-milling the mixed solution with a ball mill for 5-50min, centrifuging, washing with ethanol for 1-3 times, and oven drying.
The ball milling medium for ball milling treatment is zirconia beads with the diameter of 5-10mm, and the mass ratio of the mixed solution to the ball milling medium is 1: (10-100).
The drying temperature is 45-65 ℃, the absolute pressure is 100-200Pa, and the time is 15-25 h.
The invention also provides modified emulsified asphalt prepared by the preparation method of the modified emulsified asphalt.
The invention has the beneficial effects that:
the modified emulsified asphalt prepared by adopting the reasonable mixture ratio of the raw materials improves the bonding capacity of the modified emulsified asphalt.
The modified emulsified asphalt provided by the invention has good stability and oxidation resistance, improves the mechanical property and anti-rutting capability of the asphalt, has good weather resistance, and can adapt to severe environments.
The modified emulsified asphalt has good adaptability to various construction methods; the hardness is good, and the puncture resistance is good; the plasticity is good, and the low-temperature extensibility is excellent; the storage stability performance is excellent; excellent in shear failure resistance.
The preparation method of the modified emulsified asphalt has the advantages of simple operation, wide raw material source and low cost.
Detailed Description
The materials used are described below: the high-speed shearing disperser is a high-speed shearing disperser with the specification of FL4, which is provided by Luguan chemical machinery, Inc. in Laizhou. The talcum powder is 400 meshes of talcum powder provided by Zhanteng mineral processing factories in Lingshou county, and the product grade is a superior product. The ball mill is an upright ball mill provided by Mindssun machinery, Inc. of Ministry of Jiangyin and with model number of LQM-200, and the rotating speed of a ball milling shaft is 130 r/min. Xylene, CAS number: 1330-20-7. 3-mercaptopropyltriethoxysilane, CAS No.: 14814-09-6. Hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], CAS no: 35074-77-2. The liquid phosphite antioxidant was prepared according to the method described in example 1 of the specific embodiment of the chinese patent application No. 201610582274.5. The polyvinyl alcohol is 2488 type polyvinyl alcohol provided by Pengyu chemical Co., Ltd, Yuchu City, Hebei province. The polyacrylamide is non-ionic Polyacrylamide (PAMN) provided by Pengyang chemical Co., Ltd. of Fuchung City with a molecular weight of 500-600 ten thousand. Cetyltrimethylammonium chloride, CAS number: 112-02-7. Tall oil is provided by Zhenli chemical company, Inc. in Datian county, and is DTO-40. The thermoplastic styrene-butadiene rubber is provided by the stocky petrochemical division of China petrochemical group asset management and management company Limited and has the model of YH791(SBS 1301). The petroleum asphalt is 70# petroleum asphalt provided by SK group (shanghai) ltd. The 3,3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant was prepared according to the method shown in example 2 of the specific embodiment of the chinese patent application No. 201510412515.7. The p-methylphenol-dicyclopentadiene styrenated antioxidant resin was prepared according to the method shown in example 1 in the detailed embodiment of chinese patent application No. 200610017126.5. Solubility: soluble in aromatic solvents such as styrene, acetone and alcohols, and insoluble in water and aliphatic solvents.
Example 1
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of talcum powder, 4 parts by weight of ethanol, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The polyacrylamide is nonionic polyacrylamide.
Example 2
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of modified talcum powder, 4 parts by weight of ethanol, 1.02 parts by weight of antioxidant, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The antioxidant is p-methylphenol-dicyclopentadiene styrenated antioxidant resin.
The polyacrylamide is nonionic polyacrylamide.
The preparation method of the modified talcum powder comprises the following steps: weighing 25g of talcum powder and 50g of 3-mercaptopropyltriethoxysilane, adding 1000g of deionized water, uniformly mixing, adjusting the pH to 4 by using 0.2mol/L hydrochloric acid, stirring at 80 ℃ and 600r/min for 15h, centrifuging at 6000r/min for 30min, removing supernatant, washing the precipitate with water for 2 times, wherein the amount of washing water is 2 times of the weight of the precipitate, and drying the precipitate at 50 ℃ and 130Pa absolute pressure for 20h to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], liquid phosphite ester antioxidant and dimethylbenzene according to the mass ratio of 1: 0.5: 0.1: 2, uniformly mixing to obtain a mixed solution; carrying out ball milling treatment on the mixed solution for 30min by using a ball mill, wherein the ball milling medium subjected to the ball milling treatment is zirconia beads with the diameter of 6mm, and the mass ratio of the mixed solution to the ball milling medium is 1: 50, obtaining the ball grinding material; and then centrifugally separating the ball grinding material for 20min at the rotating speed of 6000r/min, removing supernatant, washing the precipitate with ethanol for 2 times, wherein the amount of the ethanol used for washing each time is 2 times of the weight of the precipitate, and drying the precipitate at the temperature of 50 ℃ and the absolute pressure of 130Pa for 20h to obtain the modified talcum powder.
Example 3
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of talcum powder, 4 parts by weight of ethanol, 1.02 parts by weight of antioxidant, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The antioxidant is p-methylphenol-dicyclopentadiene styrenated antioxidant resin.
The polyacrylamide is nonionic polyacrylamide.
Example 4
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of modified talcum powder, 4 parts by weight of ethanol, 1.02 parts by weight of antioxidant, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The antioxidant is p-methylphenol-dicyclopentadiene styrenated antioxidant resin.
The polyacrylamide is nonionic polyacrylamide.
The preparation method of the modified talcum powder comprises the following steps: weighing 25g of talcum powder and 50g of 3-mercaptopropyltriethoxysilane, adding 1000g of deionized water, uniformly mixing, adjusting the pH to 4 by using 0.2mol/L hydrochloric acid, stirring at 80 ℃ and 600r/min for 15h, centrifuging at 6000r/min for 30min, removing supernatant, washing the precipitate with water for 2 times, wherein the amount of washing water is 2 times of the weight of the precipitate, and drying the precipitate at 50 ℃ and 130Pa absolute pressure for 20h to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], and dimethylbenzene according to a mass ratio of 1: 0.5: 2, uniformly mixing to obtain a mixed solution; carrying out ball milling treatment on the mixed solution for 30min by using a ball mill, wherein the ball milling medium subjected to the ball milling treatment is zirconia beads with the diameter of 6mm, and the mass ratio of the mixed solution to the ball milling medium is 1: 50, obtaining the ball grinding material; and then centrifugally separating the ball grinding material for 20min at the rotating speed of 6000r/min, removing supernatant, washing the precipitate with ethanol for 2 times, wherein the amount of the ethanol used for washing each time is 2 times of the weight of the precipitate, and drying the precipitate at the temperature of 50 ℃ and the absolute pressure of 130Pa for 20h to obtain the modified talcum powder.
Example 5
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of modified talcum powder, 4 parts by weight of ethanol, 1.02 parts by weight of antioxidant, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The antioxidant is 3,3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant.
The polyacrylamide is nonionic polyacrylamide.
The preparation method of the modified talcum powder comprises the following steps: weighing 25g of talcum powder and 50g of 3-mercaptopropyltriethoxysilane, adding 1000g of deionized water, uniformly mixing, adjusting the pH to 4 by using 0.2mol/L hydrochloric acid, stirring at 80 ℃ and 600r/min for 15h, centrifuging at 6000r/min for 30min, removing supernatant, washing the precipitate with water for 2 times, wherein the amount of washing water is 2 times of the weight of the precipitate, and drying the precipitate at 50 ℃ and 130Pa absolute pressure for 20h to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], liquid phosphite ester antioxidant and dimethylbenzene according to the mass ratio of 1: 0.5: 0.1: 2, uniformly mixing to obtain a mixed solution; carrying out ball milling treatment on the mixed solution for 30min by using a ball mill, wherein the ball milling medium subjected to the ball milling treatment is zirconia beads with the diameter of 6mm, and the mass ratio of the mixed solution to the ball milling medium is 1: 50, obtaining the ball grinding material; and then centrifugally separating the ball grinding material for 20min at the rotating speed of 6000r/min, removing supernatant, washing the precipitate with ethanol for 2 times, wherein the amount of the ethanol used for washing each time is 2 times of the weight of the precipitate, and drying the precipitate at the temperature of 50 ℃ and the absolute pressure of 130Pa for 20h to obtain the modified talcum powder.
Example 6
The preparation method of the modified emulsified asphalt comprises the following steps:
(1) heating 100 parts by weight of water to 80 ℃, then sequentially adding 5 parts by weight of polyvinyl alcohol, 4 parts by weight of modified talcum powder, 4 parts by weight of ethanol, 1.02 parts by weight of antioxidant, 1.6 parts by weight of cationic emulsifier, 0.04 part by weight of tall oil and 0.8 part by weight of polyacrylamide, stirring and mixing for 10min at the rotating speed of 300r/min, then adding 100 parts by weight of matrix asphalt and 5 parts by weight of thermoplastic styrene-butadiene rubber, heating to 155 ℃, stirring and mixing for 20min at the rotating speed of 300r/min, and obtaining a mixture;
(2) and shearing and dispersing the mixture for 20min at the rotating speed of 1200r/min to obtain the modified emulsified asphalt.
The matrix asphalt is petroleum asphalt.
The cationic emulsifier is cetyl trimethyl ammonium chloride.
The antioxidant is prepared from p-methylphenol-dicyclopentadiene styrenated antioxidant resin, 3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant and a mixture of the two in a mass ratio of (2): 1 are mixed to obtain the product.
The polyacrylamide is nonionic polyacrylamide.
The preparation method of the modified talcum powder comprises the following steps: weighing 25g of talcum powder and 50g of 3-mercaptopropyltriethoxysilane, adding 1000g of deionized water, uniformly mixing, adjusting the pH to 4 by using 0.2mol/L hydrochloric acid, stirring at 80 ℃ and 600r/min for 15h, centrifuging at 6000r/min for 30min, removing supernatant, washing the precipitate with water for 2 times, wherein the amount of washing water is 2 times of the weight of the precipitate, and drying the precipitate at 50 ℃ and 130Pa absolute pressure for 20h to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], liquid phosphite ester antioxidant and dimethylbenzene according to the mass ratio of 1: 0.5: 0.1: 2, uniformly mixing to obtain a mixed solution; carrying out ball milling treatment on the mixed solution for 30min by using a ball mill, wherein the ball milling medium subjected to the ball milling treatment is zirconia beads with the diameter of 6mm, and the mass ratio of the mixed solution to the ball milling medium is 1: 50, obtaining the ball grinding material; and then centrifugally separating the ball grinding material for 20min at the rotating speed of 6000r/min, removing supernatant, washing the precipitate with ethanol for 2 times, wherein the amount of the ethanol used for washing each time is 2 times of the weight of the precipitate, and drying the precipitate at the temperature of 50 ℃ and the absolute pressure of 130Pa for 20h to obtain the modified talcum powder.
Test example 1
The modified emulsified asphalt of examples 2 to 6 were tested for properties. Specific results are shown in table 1.
Ductility was tested according to the bitumen ductility test T0605-1993. The ductility test after aging before high-temperature storage is to store the modified emulsified asphalt at 163 ℃ for 2 days and then measure the ductility again. The storage stability was tested according to the test for storage stability of emulsified bitumen, T0655 + 1993. The bonding strength after paving the asphalt concrete is tested according to JT T983-2015 solvent asphalt-based waterproof bonding coating for roads and bridges.
Table 1: test result table
Claims (9)
1. The preparation method of the modified emulsified asphalt is characterized by comprising the following steps:
(1) heating 90-110 parts by weight of water to 70-90 ℃, then sequentially adding 3-7 parts by weight of polyvinyl alcohol, 2-7 parts by weight of modified talcum powder, 2-6 parts by weight of ethanol, 0.2-1.5 parts by weight of antioxidant, 1-2 parts by weight of cationic emulsifier, 0.02-0.06 part by weight of tall oil and 0.5-1.5 parts by weight of polyacrylamide, stirring and mixing for 5-15min at the rotation speed of 200-500r/min, then adding 95-105 parts by weight of matrix asphalt and 3-7 parts by weight of thermoplastic styrene butadiene rubber, heating to the temperature of 175 ℃ of 125-180 ℃ and stirring and mixing for 10-30min at the rotation speed of 200-500r/min to obtain a mixture;
(2) shearing and dispersing the mixture at the rotation speed of 1000-;
the preparation method of the modified talcum powder comprises the following steps: weighing 20-30g of talcum powder and 40-60g of 3-mercaptopropyltriethoxysilane, adding the talcum powder and the 3-mercaptopropyltriethoxysilane into 1100g of 900-fold water, uniformly mixing, adjusting the pH to 2-5 by using 0.1-0.5mol/L hydrochloric acid, stirring for 10-20h at the temperature of 75-95 ℃ and the rotating speed of 500-fold water at 900r/min, then carrying out centrifugal separation, washing for 1-3 times by using water, and drying to obtain silane-treated talcum powder; treating talcum powder treated by silane, hexanediol bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], liquid phosphite ester antioxidant and dimethylbenzene according to the mass ratio of 1: (0.4-0.6): (0.05-0.15): (1-3) uniformly mixing to obtain a mixed solution; ball-milling the mixed solution with a ball mill for 5-50min, centrifuging, washing with ethanol for 1-3 times, and oven drying.
2. The method for preparing modified emulsified asphalt as claimed in claim 1, wherein the base asphalt is at least one of petroleum asphalt, coal tar asphalt, and oil sand asphalt.
3. The method for preparing modified emulsified asphalt as claimed in claim 1, wherein the cationic emulsifier is at least one of cetyltrimethylammonium chloride, cetyltrimethylammonium bromide, and octadecyldimethylhydroxyethylammonium chloride.
4. The method for preparing modified emulsified asphalt as claimed in claim 1, wherein the antioxidant is at least one of p-methylphenol-dicyclopentadiene styrenated antioxidant resin, 3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant.
5. The method for preparing modified emulsified asphalt as claimed in claim 4, wherein the antioxidant is selected from p-methylphenol-dicyclopentadiene styrenated antioxidant resin, 3',5,5' -tetra-tert-butyl-2, 2' -biphenol hindered phenol antioxidant, in a mass ratio of (1-2): 1.
6. The process for producing modified emulsified asphalt as claimed in claim 1, wherein the polyacrylamide is nonionic polyacrylamide.
7. The method for preparing modified emulsified asphalt according to claim 1, wherein the ball milling medium for ball milling treatment is zirconia beads with the diameter of 5-10mm, and the mass ratio of the mixed solution to the ball milling medium is 1: (10-100).
8. The method for preparing modified emulsified asphalt as claimed in claim 1, wherein the drying temperature is 45-65 ℃, the absolute pressure is 100-200Pa, and the time is 15-25 h.
9. A modified emulsified asphalt, which is characterized by being prepared by the preparation method of the modified emulsified asphalt as claimed in any one of claims 1 to 8.
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| US3539368A (en) * | 1967-12-13 | 1970-11-10 | Armour Ind Chem Co | Method of incorporating fillers in cationic bituminous emulsions and products produced thereby |
| CN102898850A (en) * | 2012-11-10 | 2013-01-30 | 广西金雨伞防水装饰有限公司 | Modified emulsified asphalt waterproof sealant and preparation method thereof |
| CN102898947A (en) * | 2012-11-10 | 2013-01-30 | 广西金雨伞防水装饰有限公司 | Reaction bonding modified emulsified asphalt waterproof paint and preparation method thereof |
| CN106118092A (en) * | 2016-07-02 | 2016-11-16 | 青岛百千川海洋生态科技有限公司 | A kind of feature of environmental protection type rubber latex modified emulsified asphalt |
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| US3539368A (en) * | 1967-12-13 | 1970-11-10 | Armour Ind Chem Co | Method of incorporating fillers in cationic bituminous emulsions and products produced thereby |
| CN102898850A (en) * | 2012-11-10 | 2013-01-30 | 广西金雨伞防水装饰有限公司 | Modified emulsified asphalt waterproof sealant and preparation method thereof |
| CN102898947A (en) * | 2012-11-10 | 2013-01-30 | 广西金雨伞防水装饰有限公司 | Reaction bonding modified emulsified asphalt waterproof paint and preparation method thereof |
| CN106118092A (en) * | 2016-07-02 | 2016-11-16 | 青岛百千川海洋生态科技有限公司 | A kind of feature of environmental protection type rubber latex modified emulsified asphalt |
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