CN112251038A - Asphalt modification method - Google Patents
Asphalt modification method Download PDFInfo
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- CN112251038A CN112251038A CN202011172308.6A CN202011172308A CN112251038A CN 112251038 A CN112251038 A CN 112251038A CN 202011172308 A CN202011172308 A CN 202011172308A CN 112251038 A CN112251038 A CN 112251038A
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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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/28—Treatment by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2395/00—Bituminous materials, e.g. asphalt, tar or pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
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Abstract
The invention provides a modification method of asphalt, which comprises the following steps: a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt; b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material. Compared with the prior art, the modification method provided by the invention adopts a specific process, and the ultrasonic technology is used for modifying the asphalt, so that the normal operation of an instrument can be ensured, and the ultrasonic energy can be efficiently utilized; in addition, the modification method can improve the compatibility of the matrix asphalt and the modifier, and the obtained modified asphalt has good ageing resistance and high stability, so that the index of the modified asphalt is improved, and the pavement performance of the modified asphalt is improved.
Description
Technical Field
The invention relates to the technical field of road materials, in particular to a method for modifying asphalt.
Background
The traditional asphalt modification process comprises three stages of shearing, swelling and development, wherein the development process is carried out in a stirring mode. However, asphalt is easy to age in the stirring process, so that the ageing resistance is poor, and the road performance is poor; meanwhile, the polymer in the modified asphalt has poor dispersibility in the asphalt, the compatibility of the asphalt and the modifier is poor, and the modifier is easy to separate from the asphalt.
In order to solve the technical problems, the prior art is expected to apply ultrasonic technology to asphalt modification; however, asphalt is a high-viscosity system, the viscosity of modified asphalt is higher, and the reaction temperature is above 180 ℃, and the ultrasonic technology is mostly used in low-viscosity and normal-temperature systems, so the high-viscosity and high-temperature system is not favorable for normal operation of ultrasonic waves, high-temperature hot gas also easily causes damage to electronic elements or circuits, and high temperature can cause overheating protection of equipment and over-high current to cause breakdown of a main board, thereby affecting the working performance of ultrasonic equipment.
Disclosure of Invention
In view of the above, the present invention provides a method for modifying asphalt, which can use ultrasonic technology for asphalt modification to improve the compatibility between matrix asphalt and a modifier, and the obtained modified asphalt has good aging resistance and high stability.
The invention provides a modification method of asphalt, which comprises the following steps:
a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt;
b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material.
Preferably, the SBS asphalt modifier in step a) is selected from 791HSBS, HY-7301SBS or LG501S SBS.
Preferably, the mass ratio of the base asphalt to the SBS asphalt modifier in the step a) is 100: (1-10).
Preferably, the temperature of the shearing treatment in the step a) is 170-190 ℃, the rotating speed is 4000-5000 r/min, and the time is 30-120 min.
Preferably, the cosolvent in the step b) is aromatic oil; the stabilizer is sulfur; the mass ratio of the cosolvent to the stabilizer to the matrix asphalt in the step a) is (0.5-10): (0.1-1): 100.
preferably, the combination of power ultrasound and stirring in step b) is specifically that power ultrasound and stirring are performed alternately and power ultrasound is performed first.
Preferably, the development process in the step b) by combining power ultrasound and stirring is specifically as follows:
firstly, carrying out power ultrasonic treatment for 4-6 min, and then stirring for 4-6 min; repeating the above steps until the development is completed.
Preferably, the power of the power ultrasound in the step b) is 1kW to 2 kW.
Preferably, the rotating speed of the stirring in the step b) is 600 r/min-800 r/min.
Preferably, the temperature of development in step b) is from 170 ℃ to 190 ℃.
The invention provides a modification method of asphalt, which comprises the following steps: a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt; b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material. Compared with the prior art, the modification method provided by the invention adopts a specific process, and the ultrasonic technology is used for modifying the asphalt, so that the normal operation of an instrument can be ensured, and the ultrasonic energy can be efficiently utilized; in addition, the modification method can improve the compatibility of the matrix asphalt and the modifier, and the obtained modified asphalt has good ageing resistance and high stability, so that the index of the modified asphalt is improved, and the pavement performance of the modified asphalt is improved.
In addition, the modification method provided by the invention can shorten the development time, improve the production efficiency and has wide application prospect.
Drawings
FIG. 1 is a fluorescence microscope image of a modified asphalt material obtained by the modification method provided in example 1;
FIG. 2 is a fluorescence microscope image of the modified asphalt material obtained by the modification method provided in comparative example 1.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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.
The invention provides a modification method of asphalt, which comprises the following steps:
a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt;
b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material.
The invention firstly mixes the matrix asphalt and the SBS asphalt modifier, and then carries out shearing treatment to obtain the initial modified asphalt.
The present invention is not particularly limited in kind and source of the base asphalt, and various kinds of base asphalt known to those skilled in the art may be used as commercially available products. In a preferred embodiment of the invention, the base asphalt is asphalt No. 70.
In the present invention, the SBS asphalt modifier is preferably selected from 791H SBS, HY-7301SBS or LG501S SBS, more preferably 791H SBS. The source of the SBS asphalt modifier is not particularly limited in the present invention, and commercially available products of the 791H SBS, HY-7301SBS and LG501S SBS as described above, which are well known to those skilled in the art, may be used.
In the present invention, the mass ratio of the base asphalt to the SBS asphalt modifier is preferably 100: (1-10), more preferably 100: (4-5).
The apparatus for the shearing treatment according to the present invention is not particularly limited, and a shearing machine well known to those skilled in the art may be used. In the invention, the temperature of the shearing treatment is preferably 170-190 ℃, and more preferably 180-185 ℃; the rotating speed of the shearing treatment is preferably 4000 r/min-5000 r/min, and more preferably 4500 r/min; the time for the shearing treatment is preferably 30 to 120min, more preferably 50 to 60 min.
After the initial modified asphalt is obtained, the initial modified asphalt is mixed with a cosolvent and a stabilizer, and the mixture is developed for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material.
In the present invention, the co-solvent is preferably an aromatic oil; the aromatic hydrocarbon oil can be rubber oil, furfural extract oil or reduced third-line wax oil, and the source of the aromatic hydrocarbon oil is not particularly limited. In the present invention, the stabilizer is preferably sulfur, and the source of the sulfur is not particularly limited in the present invention. In the invention, the mass ratio of the cosolvent, the stabilizer and the matrix asphalt in the step a) is preferably (0.5-10): (0.1-1): 100, more preferably (3-5): (0.15-0.25): 100.
in the invention, the development process adopts a mode of combining power ultrasound and stirring, on one hand, the development of asphalt can be strengthened to obtain modified asphalt with better compatibility and better ageing resistance, on the other hand, the smooth implementation of an ultrasonic technology under a high-viscosity high-temperature system is met, and the technical barrier of the ultrasonic technology in the asphalt field is overcome, so that the normal operation of an instrument is ensured, and the ultrasonic energy can be efficiently utilized.
In the present invention, the combination of the power ultrasound and the stirring is preferably performed in a manner that the power ultrasound and the stirring are performed alternately and the power ultrasound is performed first. The power ultrasound is used as an ultrasonic technology, which is beneficial to strengthening the development process of the asphalt through ultrasonic waves and generating a series of physical and chemical effects such as cavitation effect, mechanical effect, thermal effect and the like, and the physical and chemical effects can improve the physical change and chemical reaction of the treated medium; in the invention, during the development process of the modified asphalt, the network structure formed by the SBS asphalt modifier has important influence on the performance of the modified asphalt, a large amount of organic functional groups such as hydroxyl, carbon group and ester group exist in the matrix asphalt, and energy generated by cavitation causes the breakage of C-C, C-S bond, generates a large amount of free radicals, decomposes the asphaltene into small molecular substances, promotes the reaction between the matrix asphalt and the SBS asphalt modifier, enhances the stability of the network structure or forms a new network structure, thereby improving the road performance and the stability of the modified asphalt; in addition, the cavitation effect generated by the ultrasonic can also refine polymer particles and enhance the stirring effect on the system.
In the invention, the development process by combining power ultrasound and stirring is preferably as follows:
firstly, carrying out power ultrasonic treatment for 4-6 min, and then stirring for 4-6 min; repeating the above steps until the development is completed;
more preferably:
firstly, carrying out power ultrasonic treatment for 5min, and then stirring for 5 min; repeating the above steps until the development is completed.
In a preferred embodiment of the present invention, the development time is 30min, and on this basis, the development process by combining power ultrasound and stirring specifically includes:
firstly carrying out power ultrasound for 5in, then stirring for 5min, then carrying out power ultrasound for 5min, and then stirring for 5min, thus finishing the development process.
The power ultrasonic device is not limited in particular, and ultrasonic transducers known to those skilled in the art can be used. In the invention, the power of the power ultrasound is preferably 1kW to 2kW, more preferably 1.2kW to 1.8kW, and more preferably 1.6 kW.
In the present invention, the rotation speed of the stirring is preferably 600r/min to 800r/min, more preferably 650r/min to 750r/min, and still more preferably 700 r/min.
In the present invention, the temperature of development is preferably 170 to 190 ℃, more preferably 180 to 185 ℃.
The modification method provided by the invention adopts a power ultrasonic and stirring combined technology in a development stage, and the traditional asphalt modification process adopts a stirring mode for development, so that the obtained modified asphalt has poor ageing resistance and is easy to age, and the modifier and the asphalt have poor compatibility and are easy to segregate; and the development is carried out by adopting an ultrasonic technology, so that the normal operation of equipment cannot be ensured. On the basis, the invention adopts the ultrasonic wave reinforced asphalt development and stirring combined technology, on one hand, the equipment obstacle is overcome, on the other hand, a series of physical and chemical effects such as cavitation effect, mechanical effect, thermal effect and the like generated by the ultrasonic technology are efficiently utilized, and the combined effect of 1+1 & gt 2 is achieved; the obtained modified asphalt has good compatibility and excellent ageing resistance, thereby improving the index of the modified asphalt and improving the pavement performance of the modified asphalt; and the development time is shortened, and the production efficiency is improved.
Experimental results show that the modified asphalt material obtained by the modification method provided by the invention has good compatibility, the segregation index is 0.5, the development time is shortened, the ductility of the modified asphalt material after rotary aging is higher by 23cm, and the aging resistance of the asphalt is obviously improved; the PG grade is 82-28, under the conditions that the original rutting factor G/sin delta is not less than 1.0kPa and the rutting factor G/sin delta after the aging of a rotary film oven is not less than 2.2kPa, the high temperature grade is 82, which shows that the anti-rutting performance is better, the analysis reason is that the power ultrasonic technology is adopted to strengthen the development of asphalt, the cavitation generated by ultrasonic refines polymer particles, the compatibility of modifier particles and the asphalt is better, and the high temperature grade is higher; the fatigue cracking factor G/sin delta is smaller than that of a conventional experiment at the same temperature, which shows that the fatigue resistance is better; the low temperature grade is 28, which indicates that the low temperature performance is better, and the analysis reason is that the power ultrasound enables the matrix asphalt and the SBS asphalt modifier to react, so that the stability of the network structure is enhanced or a new network structure is formed; finally, the fluorescence microscope image also confirms the spatial network structure formed.
Meanwhile, the modified asphalt can be obtained by only shearing and developing the raw materials, and the modification method provided by the invention has the advantages of simple process and lower cost, and is also suitable for large-scale industrial production.
The invention provides a modification method of asphalt, which comprises the following steps: a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt; b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material. Compared with the prior art, the modification method provided by the invention adopts a specific process, and the ultrasonic technology is used for modifying the asphalt, so that the normal operation of an instrument can be ensured, and the ultrasonic energy can be efficiently utilized; in addition, the modification method can improve the compatibility of the matrix asphalt and the modifier, and the obtained modified asphalt has good ageing resistance and high stability, so that the index of the modified asphalt is improved, and the pavement performance of the modified asphalt is improved.
In addition, the modification method provided by the invention can shorten the development time, improve the production efficiency and has wide application prospect.
To further illustrate the present invention, the following examples are provided for illustration. The raw materials used in the following examples of the present invention are all commercially available products; wherein the matrix asphalt is Marie No. 70 matrix asphalt; the SBS asphalt modifier is 791H SBS; the cosolvent is rubber oil; the stabilizer is sulfur.
Example 1
Adding 500g of matrix asphalt and 20.5g of SBS asphalt modifier into a 1L enamel cylinder, controlling the temperature to be 185 ℃ by adopting a heating sleeve, shearing for 50min at the rotating speed of 4500r/min, after the shearing is finished, adding 20g of cosolvent and 1g of stabilizer into the obtained sample, controlling the temperature to be 185 ℃, and developing for 30min by adopting a mode of combining power ultrasound and stirring (firstly, adopting power ultrasound for 5min, then stirring for 5min, and alternately developing according to the period, wherein the power of the power ultrasound is 1.6kW, and the rotating speed of the stirring is 700r/min), thus obtaining the modified asphalt material.
Example 2
Adding 500g of matrix asphalt and 20.5g of SBS asphalt modifier into a 1L enamel cylinder, controlling the temperature to be 185 ℃ by adopting a heating sleeve, shearing for 50min at the rotating speed of 4500r/min, adding 20g of cosolvent and 1g of stabilizer into the obtained sample after the shearing is finished, controlling the temperature to be 185 ℃, and developing for 30min by adopting a mode of combining power ultrasound and stirring (firstly, adopting power ultrasound for 5min, then stirring for 5min, and alternately developing according to the period, wherein the power of the power ultrasound is 1kW, and the rotating speed of the stirring is 700r/min), thus obtaining the modified asphalt material.
Example 3
Adding 500g of matrix asphalt and 20.5g of SBS asphalt modifier into a 1L enamel cylinder, controlling the temperature to be 185 ℃ by adopting a heating sleeve, shearing for 50min at the rotating speed of 4500r/min, adding 20g of cosolvent and 1g of stabilizer into the obtained sample after the shearing is finished, controlling the temperature to be 185 ℃, and developing for 30min by adopting a mode of combining power ultrasound and stirring (firstly, adopting power ultrasound for 5min, then stirring for 5min, and alternately developing according to the period, wherein the power of the power ultrasound is 2kW, and the rotating speed of the stirring is 700r/min), thus obtaining the modified asphalt material.
Comparative example 1
The modification process provided in example 1 was used with the difference that: developing for 30min by stirring; obtaining the modified asphalt material.
The modified asphalt materials provided in example 1 and comparative example 1 were tested for various properties, and the results are shown in table 1.
Table 1 various performance data for the modified bituminous materials provided in example 1 and comparative example 1
| Test items | Example 1 | Example 2 | Example 3 | Comparative example 1 | Test method |
| Isolation/. degree.C | 0.5 | 5.2 | 1.0 | 15 | T 0661 |
| Residual ductility after RTFOT, 5 deg.C | 23 | 17 | 15 | 13 | T 0605 |
| PG rating | 82-28 | - | - | 76-22 | AASHTO |
Table 2 PG data for modified asphalt materials provided in example 1 and comparative example 1
As can be seen from tables 1-2, the modified asphalt obtained by the modification method provided by the embodiment 1 of the invention is isolated to 0.5 ℃, which indicates that the asphalt and the modifier have good compatibility, and the ductility after rotary aging is large, which indicates that the aging resistance is good; the modified asphalt obtained in example 2 has a poorer segregation index than that of example 1, but is better than that of comparative example 1; the modified asphalt obtained in example 3 had a degree of rolling aging of 15, which was inferior to that of example 1, indicating that the asphalt was excessively developed and aged, but was superior to that of comparative example 1.
The PG grade of the example 1 is 82-28, under the conditions that the original rutting factor G/sin delta is not less than 1.0kPa and the rutting factor G/sin delta after the aging of a rotary film oven is not less than 2.2kPa, the high-temperature grade of the example 1 is 82, and the high-temperature grade of the comparative example 1 is 76, which shows that the rutting resistance of the example 1 is better, the analysis reason is that the power ultrasonic technology is adopted to strengthen the development of asphalt, the cavitation generated by ultrasonic waves refines polymer particles, the compatibility of modifier particles and asphalt is better, and the high-temperature grade is higher; the fatigue cracking factor G x/sin δ of example 1 is smaller than that of comparative example 1 at the same temperature, indicating that the fatigue resistance of example 1 is better. The low temperature rating of example 1 was 28 and the low temperature rating of comparative example 1 was 22, which illustrates that the low temperature performance of example 1 is better, and the analysis is due to the fact that the power ultrasonic technology makes the asphalt react with the SBS modifier, and the stability of the network structure is enhanced or a new network structure is formed.
Referring to fig. 1-2, fig. 1 is a fluorescence microscope image of a modified asphalt material obtained by the modification method provided in example 1, and fig. 2 is a fluorescence microscope image of a modified asphalt material obtained by the modification method provided in comparative example 1.
As can be seen from FIGS. 1-2, the modified asphalt of example 1 has formed a spatial network structure, which indicates that the modifier has good compatibility with asphalt and a stable internal structure; in the modified asphalt of comparative example 1, the modifier is dispersed in the asphalt in a granular form, only a small part of the modifier is crosslinked, and the internal structure is unstable and easy to separate; the analysis reason is that the power ultrasonic technology promotes the reaction between the asphalt and the SBS modifier, so that the stability of the network structure is enhanced or a new network structure is formed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for modifying asphalt comprises the following steps:
a) mixing the matrix asphalt and the SBS asphalt modifier, and then shearing to obtain initial modified asphalt;
b) mixing the initial modified asphalt obtained in the step a) with a cosolvent and a stabilizer, and developing for 20-40 min by adopting a mode of combining power ultrasound and stirring to obtain a modified asphalt material.
2. The modification process according to claim 1, wherein the SBS asphalt modifier in step a) is selected from 791H SBS, HY-7301SBS or LG501S SBS.
3. The modification method according to claim 1, wherein the mass ratio of the base asphalt and the SBS asphalt modifier in the step a) is 100: (1-10).
4. The modification method according to claim 1, wherein the temperature of the shearing treatment in the step a) is 170 ℃ to 190 ℃, the rotating speed is 4000r/min to 5000r/min, and the time is 30min to 120 min.
5. The modification method according to claim 1, wherein the cosolvent in step b) is an aromatic oil; the stabilizer is sulfur; the mass ratio of the cosolvent to the stabilizer to the matrix asphalt in the step a) is (0.5-10): (0.1-1): 100.
6. modification method according to claim 1, characterized in that the power ultrasound and the stirring in step b) are combined in such a way that power ultrasound and stirring are performed alternately and first.
7. The modification method according to claim 6, wherein the development process in step b) by combining power ultrasound and stirring is specifically as follows:
firstly, carrying out power ultrasonic treatment for 4-6 min, and then stirring for 4-6 min; repeating the above steps until the development is completed.
8. The modification method according to claim 1, wherein the power of the power ultrasound in step b) is 1 to 2 kW.
9. The modification method according to claim 1, wherein the rotation speed of the stirring in the step b) is 600 to 800 r/min.
10. The modification method according to claim 1, wherein the temperature of development in step b) is 170 ℃ to 190 ℃.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025070A (en) * | 2021-03-17 | 2021-06-25 | 山东京博石油化工有限公司 | Preparation method of high-viscosity modified asphalt |
| CN114836051A (en) * | 2022-06-02 | 2022-08-02 | 江苏亿虎沥青材料有限公司 | PG82-22 grade modified asphalt and its production method |
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| CN102453333A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Preparation method of polymer modified asphalt |
| CN109897390A (en) * | 2019-03-01 | 2019-06-18 | 张莉 | A kind of polymer modified asphalt and preparation method thereof |
| CN110080064A (en) * | 2019-05-31 | 2019-08-02 | 中北大学 | A kind of polymer modified asphalt ultrasound-compound Preparation equipment of shearing and technique |
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2020
- 2020-10-28 CN CN202011172308.6A patent/CN112251038A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102453333A (en) * | 2010-10-15 | 2012-05-16 | 中国石油化工股份有限公司 | Preparation method of polymer modified asphalt |
| CN109897390A (en) * | 2019-03-01 | 2019-06-18 | 张莉 | A kind of polymer modified asphalt and preparation method thereof |
| CN110080064A (en) * | 2019-05-31 | 2019-08-02 | 中北大学 | A kind of polymer modified asphalt ultrasound-compound Preparation equipment of shearing and technique |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025070A (en) * | 2021-03-17 | 2021-06-25 | 山东京博石油化工有限公司 | Preparation method of high-viscosity modified asphalt |
| CN114836051A (en) * | 2022-06-02 | 2022-08-02 | 江苏亿虎沥青材料有限公司 | PG82-22 grade modified asphalt and its production method |
| CN114836051B (en) * | 2022-06-02 | 2024-01-23 | 江苏亿虎沥青材料有限公司 | PG82-22 grade modified asphalt and production method thereof |
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Application publication date: 20210122 |