CN114790337B - Asphalt modifier, preparation method thereof and modified low-carbon asphalt - Google Patents
Asphalt modifier, preparation method thereof and modified low-carbon asphalt Download PDFInfo
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Abstract
The invention provides a preparation method of an asphalt modifier, which comprises the following steps: firstly, mixing a phthalate compound and a hydroxyethyl-2-heptadecenyl imidazoline betaine polymer in a solvent I, and carrying out wet grinding treatment and low-temperature pressure reduction treatment to obtain a low-carbon agent; secondly, mixing animal fibers and the recovered biological oil uniformly, carrying out wet grinding treatment to obtain a wet grinding product, separating and screening slurry of the wet grinding product, washing with cyclohexane, centrifuging and drying to obtain modified fibers; and finally, mixing the modified fiber and the low-carbon agent according to a certain proportion to obtain the asphalt modifier. The invention also provides modified low-carbon asphalt containing the asphalt modifier, which has the advantages of low mixing temperature, less carbon dioxide emission, energy conservation and the like, and also has better anti-aging performance. The asphalt modifier and the modified low-carbon asphalt provided by the invention broaden the application field of asphalt materials and provide an ideal material for low-carbon asphalt for roads.
Description
Technical Field
The invention belongs to the technical field of modified asphalt materials, and particularly relates to an asphalt modifier and a preparation method thereof, and also relates to modified low-carbon asphalt.
Background
Asphalt pavement refers to various types of pavement that are made by incorporating into mineral materials a road asphalt material. The asphalt binder improves the capability of the paving aggregate to resist damage of traveling vehicles and natural factors to the pavement, so that the pavement is smooth, less in dust, impermeable and durable. Accordingly, asphalt pavement is one of the most widely used high-grade pavements in road construction. However, during the production of raw materials during the construction of asphalt pavements, such as the mining of stone materials, the refining of asphalt, and the use of large machines during the mixing, paving and rolling of high-temperature asphalt during the construction, a large amount of energy is consumed, and simultaneously, greenhouse gases emitted from the processing links also increase the burden of serious pollution to the global environment.
In recent years, resource saving and environmental protection are always important topics of concern in China and all countries in the world, and in order to effectively solve the problems of large resource consumption, high pollution emission and the like in the engineering construction industry, carbon emission in the construction engineering is effectively controlled, energy conservation and emission reduction are realized, sustainable, green and low-carbon development of the construction industry is promoted, and the urgent need exists.
The patent CN101837603B discloses a preparation method of a low-carbon asphalt mixture, and the invention reduces the emission of carbon dioxide, lowers the mixing temperature and the paving temperature of the asphalt mixture and reduces the energy consumption by directly adding a low-carbon agent into modified asphalt or matrix asphalt.
However, the mixing temperature of the low-carbon asphalt mixture cannot be well controlled, and the mixing uniformity of the low-carbon agent and the matrix asphalt is poor; in addition, the high-temperature stability and the aging resistance of the modified asphalt are not ideal enough, so that the application field and the applicable environment of the modified asphalt are limited to a certain extent.
Disclosure of Invention
The invention aims to provide a preparation method of an asphalt modifier, which can effectively reduce the mixing temperature of asphalt, reduce the emission of carbon dioxide and improve the aging resistance of the asphalt.
The invention also aims to provide the asphalt modifier which can effectively reduce the mixing temperature of the asphalt, reduce the emission of carbon dioxide and improve the aging resistance of the asphalt.
The invention also aims to provide the modified asphalt with low mixing temperature, less carbon dioxide emission, low energy consumption, good ageing resistance and excellent high-temperature stability.
The fourth purpose of the invention is to provide a preparation method of modified asphalt with low mixing temperature, less carbon dioxide emission, low energy consumption, good ageing resistance and excellent high-temperature stability.
The technical scheme adopted by the invention for realizing the purpose is to provide a preparation method of the asphalt modifier, which comprises the following steps:
s1, mixing a phthalate compound and a hydroxyethyl-2-heptadecenyl imidazoline betaine polymer in a solvent I, and carrying out wet grinding treatment and low-temperature pressure reduction treatment to obtain a low-carbon agent;
s2, mixing animal fibers and the recovered bio-oil uniformly, carrying out wet grinding treatment to obtain a wet grinding product, separating and screening slurry of the wet grinding product, washing with cyclohexane, centrifuging and drying to obtain modified fibers;
s3, mixing the modified fiber and the low-carbon agent according to the mass ratio of 1;
in the steps S1 and S2, the wet grinding process uses agate balls as a grinding medium, and the composition of the agate balls is 10mm.
The general concept of the preparation method of the asphalt modifier provided by the invention is as follows: firstly, the invention prepares a novel low-carbon agent, and the applicant finds that the low-carbon agent prepared by taking a phthalate compound and a hydroxyethyl-2-heptadecenyl imidazoline betaine polymer as raw materials can obtain a better compatibility effect with asphalt compared with other types of low-carbon agents through a great deal of research, and the prepared low-carbon agent can obviously reduce the viscosity among the asphalt and reduce the mixing temperature. In addition, phthalate and hydroxyethyl-2-heptadecenyl imidazoline betaine polymers can play a certain plasticizing role. Secondly, the modified fiber is prepared from the animal fiber, and the recovered bio-oil is used as a solvent to carry out wet grinding modification on the modified fiber, so that the dispersion degree of the fiber is improved, and the better fusion of the low-carbon agent and the modified fiber is promoted; and thirdly, the invention also adopts a novel oil milling process, adopts grinding media with proper proportion to respectively carry out liquid phase grinding treatment on the raw materials of the low-carbon agent and the modified fiber, so that the raw materials are better fused, and the high temperature stability of the asphalt modifier and the asphalt material is improved. Finally, the modified fiber and the low-carbon agent are mixed according to the mass ratio of 1 to 10-30, so that the asphalt modifier capable of effectively reducing the asphalt mixing temperature, maintaining the asphalt stability and improving the asphalt aging resistance is prepared.
The mass ratio of the modified fiber to the low-carbon agent is controlled to be 1-30, so that the fiber and the low-carbon agent can be fully mixed to achieve a uniform distribution effect, and when the ratio is higher or lower than the range, the modification effect is not obvious enough, and the cost is increased and the raw materials are wasted.
According to the present invention, the agate balls are used as a grinding medium, wet grinding is performed, and the composition of the agate balls is set to be 10mm.
In the invention, in the step S1, the mass ratio of the phthalate compound to the hydroxyethyl-2-heptadecenyl imidazoline betaine polymer is 1; preferably, the mass ratio of the phthalate compound to the hydroxyethyl oleic acid imidazoline betaine is 1.
Further, the solvent I is selected from one of chloroform, ethyl acetate or ethanol; the mass ratio of the phthalate compound to the solvent I is 1; preferably, the mass ratio of the phthalate compound to the solvent I is 1:100.
preferably, the phthalate-based compound is selected from diethyl phthalate or dimethyl phthalate; the hydroxyethyl-2-heptadecenyl imidazoline betaine polymer (hydroxyethyl oleic imidazoline betaine polymer HEOIB) is selected from hydroxyethyl oleic imidazoline betaine.
Further, the wet grinding treatment is carried out by adopting a planetary high-speed ball mill. The rotation speed of the wet grinding treatment is 500-800 rpm, and the time of the wet grinding treatment is 10-60 min. Preferably, the time of the wet-milling process is 30min. The temperature of the low-temperature decompression operation is-50 to-30 ℃, and the pressure is 50 to 200pa.
In the present invention, in step S2, the animal fibers include silk and/or feathers; the recovered bio-oil comprises waste vegetable oil. Preferably, the mass ratio of the animal fibers to the recovered bio-oil is 1.
In general, waste animal and vegetable oil undergoes a series of chemical changes such as rancidity, oxidation and decomposition at high temperature to generate toxic substances, and if the waste animal and vegetable oil is mistakenly put on a dining table, the toxic substances can cause damage to a human body; if any of them is scattered, it will cause some pollution to water source and soil. The invention recovers and reasonably utilizes the biological oil, thereby not only realizing the reutilization of resources; meanwhile, the animal fibers are ground by taking the bio-oil as a grinding solvent, and compared with other solvents, the bio-oil modified asphalt can better disperse the animal fibers, improve the compatibility of the asphalt modifier and the modified asphalt, further improve the stability of a final asphalt product and prolong the service life of the asphalt. Preferably, the recovered bio-oil of the present invention is selected from waste vegetable oil subjected to suction filtration dehydration treatment.
In some preferred embodiments, the animal fibers are pretreated, including: drying the animal fibers in an oven at 85-95 ℃ for 18-24 h, and grinding to be not less than 400 meshes.
Further, in the step S3, the mixing temperature is 30-40 ℃, the mixing stirring speed is 500-800 rpm, and the mixing stirring time is 1-2 h.
In some preferred embodiments, the preparation method of the asphalt modifier comprises the following steps:
s1, adding 1-4 parts by weight of phthalate compounds and 1-4 parts by weight of hydroxyethyl-2-heptadecenyl imidazoline betaine polymers into 100 parts by weight of organic solvents, and carrying out wet grinding treatment for 30-60 min (taking agate balls as grinding media, setting the composition of the agate balls as being 10mm = 8 mm;
s2, uniformly mixing 1-3 parts by weight of animal fibers and 30-45 parts by weight of recovered bio-oil, wet-milling for 30-60 min (taking agate balls as a grinding medium, and setting the grading of the agate balls to be 10mm, 8mm, and 5mm = 1;
and S3, mixing 1-3 parts by weight of the modified fiber with 30 parts by weight of the low-carbon agent, controlling the temperature to be 30-40 ℃, controlling the stirring speed to be 500-800 rpm, and stirring for 1-2 hours to obtain the asphalt modifier.
The second technical scheme for achieving the purpose of the invention is to provide the asphalt modifier prepared based on the preparation method.
The technical scheme adopted by the invention for realizing the third purpose is to provide modified asphalt containing the asphalt modifier, and the modified low-carbon asphalt comprises the following components in parts by weight: 100 parts of matrix asphalt, 5-10 parts of cosolvent, 10-15 parts of flexibilizer, 1-5 parts of stabilizer and 5-10 parts of asphalt modifier.
The fourth technical scheme adopted by the invention for achieving the aim is to provide a preparation method of modified low-carbon asphalt, which comprises the following steps: adding an asphalt modifier into matrix asphalt at 130-150 ℃, adding a cosolvent, a toughening agent and a stabilizing agent, stirring at the rotating speed of 3000-5000 r/min for 30-60 min, controlling the temperature of the asphalt at 130-150 ℃, and swelling and developing the stirred product to obtain the modified low-carbon asphalt.
Further, the temperature of swelling development is 135 ℃, and the time of swelling development is 20min.
Further, the base asphalt is subjected to a pretreatment step comprising: heating the matrix asphalt to 130-150 ℃, and stirring at the rotating speed of 600-800 r/min for 5-10 min.
Preferably, the cosolvent is one of waste engine oil, coal tar or naphthenic oil; the toughening agent is a styrene-butadiene-styrene block copolymer or 100-mesh crumb rubber; the stabilizer is one of oleic acid, sodium dodecyl benzene sulfonate or cellulose ether.
Compared with the prior art, the invention has the following beneficial effects:
(1) The preparation method of the modified low-carbon asphalt provided by the invention prepares a novel low-carbon agent, can reduce the viscosity of asphalt, forms a lubricating structure in the middle of the asphalt during asphalt processing, and reduces the mixing temperature and the construction temperature of the asphalt, thereby reducing the emission of carbon dioxide and reducing the consumption of energy. By adding the animal fibers, the toughness, compressive strength and tensile strength of the asphalt can be effectively improved, and the adaptability of the asphalt is improved. By means of a novel ball milling process, materials of the low-carbon agent and the modified fibers are subjected to wet milling treatment, the particle size of the animal fibers is reduced, the dispersion degree of the fibers is improved, and better fusion between the low-carbon agent and the modified fibers, and between the asphalt modifier and the matrix asphalt is promoted.
(2) The modified low-carbon asphalt prepared by the method has the advantages of low mixing temperature, less carbon dioxide emission, energy conservation and the like, and meanwhile, the modified asphalt prepared by the method also has better ageing resistance. The modified asphalt has excellent comprehensive performance, widens the application field of asphalt materials, and is an ideal material for low-carbon asphalt for roads.
Drawings
FIG. 1 is a schematic flow chart of a preparation method of an asphalt modifier provided by the invention.
Detailed Description
The technical solutions of the present invention will be described below clearly and completely in conjunction with the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
(1) The low-carbon agent is prepared by adding 1 part by weight of diethyl phthalate and 1 part by weight of hydroxyethyl oleic acid imidazoline betaine to 100 parts by weight of chloroform, activating by liquid phase grinding (wet grinding in a planetary high-speed ball mill, using agate balls as grinding media, the agate ball grading being 10mm, 8mm =1, 3, grinding for 30 min), and by a low-temperature pressure reduction process.
(2) The animal fiber (silk) is refined by adopting a novel liquid phase ball milling process. The fiber is heated to 85 deg.C
Then 30 parts by weight of the recovered bio-oil and 1 part by weight of the above fiber were uniformly mixed and wet-milled in a planetary high-speed ball mill. Agate balls are used as grinding media, and the grade of the agate balls is 10mm:
8mm:5mm = 1. Grinding for 30min, separating the slurry, sieving, and sampling. And ultrasonically washing the fiber by cyclohexane, centrifuging, and freeze-drying to obtain the modified fiber.
(3) Adding 1 part by weight of modified fiber into 30 parts by weight of low-carbon agent, and stirring for 1 hour under the condition of controlling the temperature to be 30 ℃ and controlling the stirring speed to be 500 rpm.
(4) Heating 100 parts by weight of matrix asphalt to 130 ℃, stirring for 5min at a speed of 600r/min in a stirrer, controlling the stirring temperature at 150 ℃, adding 5 parts by weight of cosolvent, and simultaneously adding 10 parts by weight of flexibilizer, 1 part by weight of stabilizer and 5 parts by weight of asphalt modifier. Stirring with a high speed shearing instrument at 3000r/min for 30min, controlling the temperature of the asphalt at 150 ℃, and finally putting the asphalt into a 135 ℃ oven for swelling development for 20min to obtain the modified asphalt.
Example 2
(1) The low-carbon agent is prepared by adding 2 parts by weight of diethyl phthalate and 2 parts by weight of hydroxyethyl oleic acid imidazoline betaine to 100 parts by weight of ethanol, activating by liquid phase grinding (wet grinding in a planetary high-speed ball mill, using agate balls as grinding media, the agate ball grading being 10mm, 8mm =1, 3, grinding for 60 min), and by using a low-temperature pressure reduction process.
(2) The animal fiber (feather) is refined by adopting a novel liquid phase ball milling process. The fiber is heated to 85 deg.C
Then 35 parts by weight of the recovered bio-oil and 1 part by weight of the above fiber were uniformly mixed and wet-milled in a planetary high-speed ball mill. Agate balls are used as grinding media, and the grade of the agate balls is 10mm:
8mm:5mm = 1. After grinding for 40min, the slurry was separated, sieved and sampled. And (3) ultrasonically washing the fibers with cyclohexane, centrifuging, freeze-drying, adding the low-carbon agent, and controlling the process to prepare the asphalt modifier.
(3) Adding 1 part by weight of modified fiber into 30 parts by weight of low-carbon agent, controlling the stirring speed to be 500rpm under the condition of controlling the temperature to be 30 ℃, and stirring for 1 hour, thereby preparing the asphalt modifier.
(4) Heating 100 parts by weight of matrix asphalt to 135 ℃, stirring for 6min at a speed of 600r/min in a stirrer, controlling the stirring temperature to 145 ℃, and adding 6 parts by weight of cosolvent, 11 parts by weight of flexibilizer, 2 parts by weight of stabilizer and 6 parts by weight of asphalt modifier. Stirring with a high-speed shear apparatus at 3500r/min for 40min, controlling the temperature of the asphalt at 145 ℃, and finally putting the asphalt into a 135 ℃ oven for swelling development for 20min to obtain the modified asphalt.
Example 3
(1) The low-carbon agent is prepared by adding 2 parts by weight of diethyl phthalate and 3 parts by weight of hydroxyethyl oleic imidazoline betaine to 100 parts by weight of ethyl acetate, activating by liquid phase grinding (wet grinding in a planetary high-speed ball mill, using agate balls as a grinding medium, the agate ball grading being 10mm, 8mm = 3, grinding for 30 min).
(2) Animal fibers (silk and feathers) are refined by adopting a novel liquid phase ball milling process. The above fibers were dried in an oven at 90 ℃ for 20 hours and ground to 400 mesh, and then 35 parts by weight of recovered bio-oil and 2 parts by weight of the above fibers were uniformly mixed and wet-ground in a planetary high-speed ball mill. The agate balls are used as grinding media, and the grade of the agate balls is 10mm:8mm:5mm = 1. Grinding for 45min, separating the slurry, sieving, and sampling. And (3) performing cyclohexane ultrasonic washing, centrifuging, freeze drying on the fibers, adding the fibers into the low-carbon agent, and controlling the process to prepare the asphalt modifier.
(3) Adding 2 parts by weight of modified fiber into 30 parts by weight of low-carbon agent, and stirring for 1 hour under the condition of controlling the temperature to be 30 ℃ and controlling the stirring speed to be 700 rpm.
(4) Heating 100 parts by weight of matrix asphalt to 135 ℃, stirring for 7min at 700r/min in a stirrer, controlling the stirring temperature to 140 ℃, and adding 7 parts by weight of cosolvent, 12 parts by weight of flexibilizer, 2 parts by weight of stabilizer and 7 parts by weight of asphalt modifier. Stirring with a high-speed shear apparatus at 3500r/min for 40min, controlling the temperature of the asphalt at 140 ℃, and finally putting the asphalt into a 135 ℃ oven for swelling development for 20min to obtain the modified asphalt.
Example 4
(1) The low-carbon agent is prepared by adding 3 parts by weight of diethyl phthalate and 3 parts by weight of hydroxyethyl oleic imidazoline betaine to 100 parts by weight of ethyl acetate, activating by liquid phase grinding, and using a low-temperature reduced-pressure process (wet grinding in a planetary high-speed ball mill using agate balls as a grinding medium, the agate ball grading being 10mm, 5mm =1, 3.
(2) Animal fibers (silk and feather) are refined by adopting a novel liquid phase ball milling process. The fibers were dried in an oven at 90 ℃ for 21h and ground to 400 mesh, then 40 parts by weight of the recovered bio-oil and 2 parts by weight of the fibers were mixed uniformly and wet milled in a planetary high speed ball mill. Agate balls are used as grinding media, and the grade of the agate balls is 10mm:8mm:5mm = 1. Grinding for 50min, separating the slurry, sieving, and sampling. And (3) ultrasonically washing the fibers with cyclohexane, centrifuging, freeze-drying, adding the low-carbon agent, and controlling the process to prepare the asphalt modifier.
(3) Adding 2 parts by weight of modified fiber into 30 parts by weight of low-carbon agent, and stirring for 1 hour under the condition of controlling the temperature to be 30 ℃ and controlling the stirring speed to be 700 rpm.
(4) Heating 100 parts by weight of matrix asphalt to 135 ℃, stirring in a stirrer at 700r/min for 7min, controlling the stirring temperature at 130 ℃, and adding 8 parts by weight of cosolvent, 13 parts by weight of flexibilizer, 4 parts by weight of stabilizer and 8 parts by weight of asphalt modifier. Stirring with a high-speed shear apparatus at 3500r/min for 40min, controlling the temperature of the asphalt at 130 ℃, and finally putting the asphalt into a 135 ℃ oven for swelling development for 20min to obtain the modified asphalt.
Example 5
(1) Adding 3 parts by weight of diethyl phthalate and 4 parts by weight of hydroxyethyl oleic acid imidazoline betaine into 100 parts by weight of ethyl acetate, activating by liquid phase grinding (wet grinding in a planetary high-speed ball mill, using agate balls as grinding media, the agate ball grading being 10mm, 8mm = 5mm = 3, grinding for 20 min), and preparing the low-carbon agent by adopting a low-temperature pressure reduction process.
(2) Animal fibers (silk and feather) are refined by adopting a novel liquid phase ball milling process. The fibers were dried in an oven at 95 ℃ for 23 hours and ground to 400 mesh, then 45 parts by weight of the recovered bio-oil and 3 parts by weight of the fibers were mixed uniformly and wet milled in a planetary high speed ball mill. Agate balls are used as grinding media, and the grade of the agate balls is 10mm:8mm:5mm = 1. Grinding for 50min, separating the slurry, sieving, and sampling. And (3) ultrasonically washing the fibers with cyclohexane, centrifuging, freeze-drying, adding the low-carbon agent, and controlling the process to prepare the asphalt modifier.
(3) Adding 3 parts by weight of modified fiber into 30 parts by weight of low-carbon agent, and stirring for 1 hour under the condition of controlling the temperature to be 30 ℃ and controlling the stirring rotating speed to be 800 rpm.
(4) Heating 100 parts by weight of matrix asphalt to 145 ℃, stirring at 800r/min in a stirrer for 9min, controlling the stirring temperature at 130 ℃, and adding 9 parts by weight of cosolvent, 14 parts by weight of flexibilizer, 5 parts by weight of stabilizer and 9 parts by weight of asphalt modifier. Stirring with a high speed shearing instrument at 5000r/min for 55min, controlling the temperature of the asphalt at 130 deg.C, and finally putting the asphalt into a 135 deg.C oven for swelling development for 20min to obtain the modified asphalt.
Example 6
(1) Adding 4 parts by weight of diethyl phthalate and 4 parts by weight of hydroxyethyl oleic acid imidazoline betaine into 100 parts by weight of chloroform, activating by liquid phase grinding (wet grinding in a planetary high-speed ball mill, using agate balls as grinding media, the agate ball grading is 10mm, 8mm = 5mm = 3, grinding for 45 min), and preparing the low-carbon agent by adopting a low-temperature pressure reduction process.
(2) Animal fibers (silk and feather) are refined by adopting a novel liquid phase ball milling process. The above fibers were dried in an oven at 95 ℃ for 24 hours and then ground to 400 mesh, and then 45 parts by weight of recovered bio-oil and 3 parts by weight of the above fibers were uniformly mixed and wet-ground in a planetary high-speed ball mill. Agate balls are used as grinding media, and the grade of the agate balls is 10mm:8mm:5mm = 1. Grinding for 60min, separating the slurry, sieving, and sampling. And (3) ultrasonically washing the fibers with cyclohexane, centrifuging, freeze-drying, adding the low-carbon agent, and controlling the process to prepare the asphalt modifier.
(3) Adding 3 parts by weight of modified fiber into 30 parts by weight of low-carbon agent, controlling the stirring speed to 800rpm under the condition of controlling the temperature to be 30 ℃, and stirring for 1 hour, thereby preparing the asphalt modifier.
(4) Heating 100 parts by weight of matrix asphalt to 150 ℃, stirring at 800r/min in a stirrer for 10min, controlling the stirring temperature at 135 ℃, and adding 10 parts by weight of cosolvent, 15 parts by weight of toughener, 5 parts by weight of stabilizer and 10 parts by weight of asphalt modifier. Stirring with high speed shear apparatus at 5000r/min for 60min, and controlling asphalt temperature at
And finally, putting the asphalt into a 135 ℃ oven for swelling development for 20min to obtain the modified asphalt.
Application example
The basic properties of the modified low carbon asphalts prepared in examples 1-6 were compared with those of commercial No. 70 base asphalt, and the results are shown in the following table:
TABLE 1
As can be seen from the above table,
compared with the 70# base asphalt, the modified low-carbon asphalt prepared in the embodiments 1-6 of the invention has better high-temperature stability (the softening point is 80.9-105 ℃) and low-temperature flexibility (the ductility at 5 ℃ is 63-73.5 cm) under the condition of meeting the precursor of the hardness of the asphalt. In addition, the modified low carbon asphalts prepared in examples 1 to 6 required lower mixing temperatures than the base asphalt, and only 130 ℃ was required in examples 4 and 5, which can reduce energy consumption and carbon dioxide emissions. Further, the data of the residual penetration ratio after the film oven is aged for 5 hours show that the residual penetration ratio after the film oven is aged for 5 hours of the modified low-carbon asphalt prepared in examples 1 to 6 is 11.7 to 32.5 percent, which shows that the modified low-carbon asphalt prepared by the invention also has better thermal stability and anti-aging effect.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A preparation method of an asphalt modifier comprises the following steps:
s1, mixing a phthalate compound and a hydroxyethyl-2-heptadecenyl imidazoline betaine polymer in a solvent I, and performing wet grinding treatment and low-temperature pressure reduction treatment to obtain a low-carbon agent;
s2, mixing animal fibers and the recovered bio-oil uniformly, carrying out wet grinding treatment to obtain a wet grinding product, separating and screening slurry of the wet grinding product, washing with cyclohexane, centrifuging and drying to obtain modified fibers;
s3, mixing the modified fiber and the low-carbon agent according to the mass ratio of 1;
in the steps S1 and S2, the wet grinding process uses agate balls as a grinding medium, and the composition of the agate balls is 10mm.
2. The method according to claim 1, wherein in the step S1, the mass ratio of the phthalate compound to the hydroxyethyl-2-heptadecenyl imidazoline betaine polymer is 1;
the phthalate ester compound is selected from diethyl phthalate or dimethyl phthalate; the hydroxyethyl-2-heptadecenyl imidazoline betaine polymer is selected from hydroxyethyl oleic acid imidazoline betaine; the solvent I is selected from one of chloroform, ethyl acetate or ethanol.
3. The method according to claim 1, wherein the rotation speed of the wet milling process is 500 to 800rpm and the time of the wet milling process is 30 to 60min in the steps S1 and S2.
4. The method according to claim 1, wherein in step S2, the animal fiber comprises silk and/or feather, and the recovered bio-oil is selected from recovered vegetable oil subjected to suction filtration dehydration; the mass ratio of the animal fibers to the recovered bio-oil is 1.
5. The method according to claim 1, wherein the mixing temperature in step S3 is 30 to 40 ℃, the mixing speed is 500 to 800rpm, and the mixing time is 1 to 2 hours.
6. An asphalt modifier, characterized by being produced by the production method according to any one of claims 1 to 5.
7. The modified low-carbon asphalt is characterized by comprising the following components in parts by weight: 100 parts of matrix asphalt, 5-10 parts of cosolvent, 10-15 parts of toughening agent, 1-5 parts of stabilizer and 5-10 parts of asphalt modifier according to claim 6.
8. The preparation method of the modified low-carbon asphalt of claim 7, comprising the following steps: adding an asphalt modifier into matrix asphalt at 130-150 ℃, adding a cosolvent, a toughening agent and a stabilizing agent, stirring at the rotating speed of 3000-5000 r/min for 30-60 min, controlling the temperature of the asphalt at 130-150 ℃, and swelling and developing a stirred product at 135 ℃ for 20min to obtain the modified low-carbon asphalt.
9. The method according to claim 8, characterized in that said base asphalt is subjected to a pre-treatment step comprising: heating the matrix asphalt to 130-150 ℃, and stirring at the rotating speed of 600-800 r/min for 5-10 min.
10. The preparation method according to claim 8, wherein the co-solvent is selected from one of used engine oil, coal tar or naphthenic oil; the toughening agent is selected from a block copolymer of styrene-butadiene-styrene or 100-mesh crumb rubber; the stabilizer is selected from one of oleic acid, sodium dodecyl benzene sulfonate or cellulose ether.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861360A (en) * | 2007-11-14 | 2010-10-13 | 阿克佐诺贝尔股份有限公司 | Asphalt modifiers for 'warm mix' applications including adhesion promoter |
| CN110228965A (en) * | 2019-06-24 | 2019-09-13 | 中国路桥工程有限责任公司 | Highway Warm-Mix Bitumen Mixture and preparation method thereof |
| CN112094505A (en) * | 2020-11-04 | 2020-12-18 | 佛山市交通科技有限公司 | SBS modified asphalt regenerant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7597754B2 (en) * | 2005-06-21 | 2009-10-06 | Andrew L. Argenio | Asphaltic compositions and methods of their manufacture |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861360A (en) * | 2007-11-14 | 2010-10-13 | 阿克佐诺贝尔股份有限公司 | Asphalt modifiers for 'warm mix' applications including adhesion promoter |
| CN110228965A (en) * | 2019-06-24 | 2019-09-13 | 中国路桥工程有限责任公司 | Highway Warm-Mix Bitumen Mixture and preparation method thereof |
| CN112094505A (en) * | 2020-11-04 | 2020-12-18 | 佛山市交通科技有限公司 | SBS modified asphalt regenerant and preparation method thereof |
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