CN112592593A - Slightly modified blended asphalt and preparation method thereof - Google Patents
Slightly modified blended asphalt and preparation method thereof Download PDFInfo
- Publication number
- CN112592593A CN112592593A CN202011460125.4A CN202011460125A CN112592593A CN 112592593 A CN112592593 A CN 112592593A CN 202011460125 A CN202011460125 A CN 202011460125A CN 112592593 A CN112592593 A CN 112592593A
- Authority
- CN
- China
- Prior art keywords
- asphalt
- sbr
- blended
- slightly modified
- stirring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 161
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 22
- 238000012986 modification Methods 0.000 claims abstract description 17
- 238000003756 stirring Methods 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 16
- 230000035515 penetration Effects 0.000 claims description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 11
- 238000010008 shearing Methods 0.000 claims description 11
- 230000004048 modification Effects 0.000 claims description 5
- 239000003208 petroleum Substances 0.000 abstract description 8
- 230000003712 anti-aging effect Effects 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 6
- 239000003607 modifier Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 18
- 230000032683 aging Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000002994 raw material Substances 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 6
- 238000004821 distillation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000011031 large-scale manufacturing process Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004523 catalytic cracking Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011301 petroleum pitch Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a slightly modified blended asphalt and a preparation method thereof; the micro-modified blended asphalt is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR micro-modification; the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3). Compared with the prior art, the slightly modified blended asphalt provided by the invention adopts the modifier with specific content components to slightly modify the blended asphalt which can not meet the asphalt index (JTG F40-2004 heavy-traffic asphalt A grade) requirement, and the obtained product has excellent and stable performance, meets the technical requirements of JTG _ F40-2004 road asphalt pavement construction technical Specification 70# A grade road petroleum asphalt, especially improves the product index after the product is aged, improves the anti-aging performance, and has wide application prospect.
Description
Technical Field
The invention relates to the technical field of asphalt, in particular to slightly modified blended asphalt and a preparation method thereof.
Background
The highway traffic infrastructure is the foundation and the destiny of national economic development, the total mileage of the national highway is 501 kilometers by the end of 2019, most of the pavement is asphalt pavement, particularly the asphalt pavement in the expressway accounts for more than 90%, and asphalt is one of indispensable important materials of the asphalt pavement and is an important support for the rapid development of national economy.
Petroleum pitch is a product of crude oil processing and is a black or blackish brown viscous liquid, semisolid or solid at ambient temperature. The main production process of the prior petroleum asphalt comprises the following steps: distillation, blending, oxidation, solvent deasphalting, and the like. The most common production process is distillation, which separates light fractions such as gasoline, kerosene, diesel oil and the like from crude oil by atmospheric distillation, and then vacuum distillates are obtained by vacuum distillation, and the residual oil is called straight-run asphalt when meeting the technical requirements of road asphalt. However, not all crude oil is suitable as asphalt raw material, in fact, many crude oils cannot be directly used as asphalt production raw material, and often the residual oil is treated and processed by combining solvent deasphalting process and blending process, etc. to obtain qualified asphalt product, the solvent deasphalting process obtains catalytic cracking feed after one-stage or two-stage extraction of vacuum residual oil treated by technology, and simultaneously, the deoiled asphalt with low wax content can be obtained and can be used as raw material of blended asphalt.
The blended asphalt is obtained by blending the residues or components of primary and secondary processing of the same crude oil or different crude oils and various industrial waste oils according to the index requirements of asphalt with different grades. The process of the blended asphalt greatly enriches the raw material sources of asphalt products, on one hand, the raw materials which are not suitable for producing the asphalt by straight-run distillation can be processed and blended to produce qualified asphalt products, and on the other hand, other industrial waste oil and other materials can be used as the raw materials of the blended asphalt to produce and process the blended asphalt products. However, because the blended asphalt has different component sources and different component properties, some indexes of the simple two-component or even three-component blended asphalt can not meet the technical requirements of grade A asphalt in JTG F40-2004 technical Specification for road asphalt pavement construction, even the indexes are not obviously improved after some functional additives are added, and the product indexes can not meet the technical requirements of grade A asphalt in JTG F40-2004 technical Specification for road asphalt pavement construction.
Disclosure of Invention
In view of the above, the invention aims to provide a slightly modified blended asphalt and a preparation method thereof, the slightly modified blended asphalt provided by the invention has the characteristics of excellent product index and stable product performance, and the product index meets the technical requirements of JTG _ F40-2004 'technical Specification for constructing asphalt road surfaces on roads' 70# A-level road petroleum asphalt.
The invention provides slightly modified blended asphalt, which is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR slight modification;
the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3).
Preferably, the needle penetration at 25 ℃ of the deoiled asphalt is 0-30 dmm, and the softening point is more than or equal to 60 ℃.
Preferably, the vacuum residue has a penetration at 25 ℃ of 300dmm or more, a softening point of 20 ℃ or more, and a flash point of 300 ℃ or more.
Preferably, the styrene bonding capacity of the SBR is 20-30%, and the bulk density is 0-1 g/cm3。
Preferably, the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (30-40): (60-70): (0.5 to 1.5).
The invention also provides a preparation method of the slightly modified blended asphalt, which is characterized by comprising the following steps:
a) blending the deoiled asphalt and the vacuum residue oil to obtain blended asphalt;
b) and b) carrying out micro-modification on the blended asphalt obtained in the step a) by using SBR to obtain micro-modified blended asphalt.
Preferably, the blending mode in the step a) is stirring; the stirring temperature is 100-180 ℃, the stirring time is 20-200 min, and the rotating speed is 500-1000 r/min.
Preferably, the micro-modification process in step b) is specifically:
adding SBR into the blended asphalt obtained in the step a), and sequentially carrying out primary stirring, shearing and secondary stirring to obtain the slightly modified blended asphalt.
Preferably, the temperature of the first stirring is 150-200 ℃, the time is 5-20 min, and the rotating speed is 500-1000 r/min;
the temperature of the second stirring is 150-200 ℃, the time is 30-100 min, and the rotating speed is 500-1000 r/min.
Preferably, the shearing temperature is 150-250 ℃, the time is 10-20 min, and the rotating speed is 3000-7000 r/min.
The invention provides a slightly modified blended asphalt and a preparation method thereof; the micro-modified blended asphalt is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR micro-modification; the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3). Compared with the prior art, the slightly modified blended asphalt provided by the invention adopts the modifier with specific content components to slightly modify the blended asphalt which can not meet the asphalt index (JTG F40-2004 heavy-traffic asphalt A grade) requirement, and the obtained product has excellent and stable performance, meets the technical requirements of JTG _ F40-2004 road asphalt pavement construction technical Specification 70# A grade road petroleum asphalt, especially improves the product index after the product is aged, improves the anti-aging performance, and has wide application prospect.
In addition, the preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production.
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 slightly modified blended asphalt, which is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR slight modification;
the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3).
In the invention, the slightly modified blended asphalt is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR slight modification, and is A-grade road petroleum asphalt. The sources of the deoiled asphalt, the vacuum residue and the SBR are not particularly limited by the invention, and the deoiled asphalt, the vacuum residue and the SBR can be any commercial products or self-produced products which are well known to those skilled in the art; the deoiled asphalt can be produced by adopting a solvent deasphalting process well known to the technical personnel in the field; the vacuum residue can be produced using atmospheric and vacuum units well known to those skilled in the art.
In the invention, the needle penetration of the deoiled asphalt at 25 ℃ is preferably 0-30 dmm, and more preferably 0-20 dmm; the softening point of the deoiled asphalt is preferably greater than or equal to 60 ℃, more preferably 60-80 ℃, and more preferably 60-70 ℃.
In the present invention, the vacuum residue preferably has a penetration at 25 ℃ of 300dmm or more, more preferably 300dmm to 400 dmm; the softening point of the vacuum residue is preferably greater than or equal to 20 ℃, and more preferably between 20 and 30 ℃; the flash point of the vacuum residue is preferably equal to or greater than 300 c, more preferably from 300 c to 350 c.
In the present invention, the SBR is a white particle; the styrene binding capacity of the SBR is preferably 20-30%, and more preferably 20-28%; the bulk density of SBR is preferably 0-1 g/cm3More preferably 0.2g/cm3～0.8g/cm3。
In the invention, the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3), preferably (30 to 40): (60-70): (0.5 to 1.5). The invention adopts the proportion, wherein the addition amount of SBR serving as a modifier is small, the SBR belongs to the micro-modification range, the influence on the overall index of the blended asphalt is small, and the aging index of the product can be improved in a key way.
The slightly-modified blended asphalt provided by the invention adopts the modifier with specific content components to slightly modify the blended asphalt which is prepared from deoiled asphalt and vacuum residue oil and cannot meet the asphalt index (JTG F40-2004 heavy-duty asphalt A grade) requirement, and the obtained product has excellent and stable performance, meets the technical requirements of JTG _ F40-2004 'Highway asphalt pavement construction technical Specification' 70# A grade road petroleum asphalt, especially improves the product index after the product is aged, and improves the aging resistance; on one hand, the source of the raw materials for producing the asphalt is widened, and the production process of the asphalt is increased; on the other hand, the performance of the blended asphalt is improved through a micro-modification process, and the product index meets the technical requirement of the grade A road petroleum asphalt, so that the product has wide application prospect.
The invention also provides a preparation method of the slightly modified blended asphalt, which is characterized by comprising the following steps:
a) blending the deoiled asphalt and the vacuum residue oil to obtain blended asphalt;
b) and b) carrying out micro-modification on the blended asphalt obtained in the step a) by using SBR to obtain micro-modified blended asphalt.
The invention firstly blends the deoiled asphalt and the vacuum residue to obtain the blended asphalt. In the present invention, the deoiled asphalt and the vacuum residue are the same as those in the above technical solution, and are not described herein again.
In the invention, the blending mode is preferably stirring; the stirring temperature is preferably 100-180 ℃, and more preferably 140-160 ℃; the stirring time is preferably 20min to 200min, and more preferably 20min to 40 min; the rotation speed of the stirring is preferably 500r/min to 1000r/min, and more preferably 600r/min to 800 r/min.
After the blended asphalt is obtained, the invention adopts SBR to slightly modify the obtained blended asphalt to obtain slightly modified blended asphalt. In the present invention, the SBR is the same as that in the above technical solution, and is not described herein again.
In the present invention, the micro-modification process is preferably specifically:
adding SBR into the blended asphalt obtained in the step a), and sequentially carrying out primary stirring, shearing and secondary stirring to obtain the slightly modified blended asphalt.
In the invention, the temperature of the first stirring is preferably 150-200 ℃, and more preferably 160-180 ℃; the first stirring time is preferably 5min to 20min, and more preferably 8min to 15 min; the rotation speed of the first stirring is preferably 500r/min to 1000r/min, and more preferably 600r/min to 800 r/min.
In the invention, the shearing temperature is preferably 150-250 ℃, and more preferably 170-190 ℃; the shearing time is preferably 10min to 20min, and more preferably 14min to 16 min; the rotation speed of the shearing is preferably 3000 r/min-7000 r/min, and more preferably 4000 r/min-6000 r/min.
In the invention, the temperature of the second stirring is preferably 150-200 ℃, and more preferably 160-180 ℃; the time for the second stirring is preferably 30min to 100min, and more preferably 50min to 70 min; the rotation speed of the second stirring is preferably 500r/min to 1000r/min, and more preferably 600r/min to 800 r/min.
The preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production.
The invention provides a slightly modified blended asphalt and a preparation method thereof; the micro-modified blended asphalt is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR micro-modification; the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3). Compared with the prior art, the slightly modified blended asphalt provided by the invention adopts the modifier with specific content components to slightly modify the blended asphalt which can not meet the asphalt index (JTG F40-2004 heavy-traffic asphalt A grade) requirement, and the obtained product has excellent and stable performance, meets the technical requirements of JTG _ F40-2004 road asphalt pavement construction technical Specification 70# A grade road petroleum asphalt, especially improves the product index after the product is aged, improves the anti-aging performance, and has wide application prospect.
In addition, the preparation method provided by the invention is simple in process, easy in condition control and suitable for large-scale production.
To further illustrate the present invention, the following examples are provided for illustration.
Example 1
Deoiled asphalt (needle penetration at 25 ℃ of 0-20 dmm and softening point of 60-70 ℃), vacuum residue (needle penetration at 25 ℃ of 300-400 dmm, softening point of 20-30 ℃ and flash point of 300-350 ℃) and SBR (white particles with styrene binding capacity of 20-28% and bulk density of 0.2 g/cm)3～0.8g/cm3) Mixing according to the mass ratio of 35: 65: 0.5; the specific process of mixing is as follows:
stirring the deoiled asphalt and the vacuum residue oil at 150 ℃ for 30min (the rotating speed is 700r/min), adding SBR, and sequentially stirring at 170 ℃ for 10min (the rotating speed is 700r/min), shearing at 180 ℃ for 15min (the rotating speed is 5000r/min), and stirring at 170 ℃ for 60min (the rotating speed is 700r/min) to obtain the uniformly mixed slightly-modified blended asphalt.
The properties of the slightly modified asphalt provided by the example 1 of the present invention are shown in table 1.
Table 1 various performance data for slightly modified asphalt provided in example 1 of the present invention
As can be seen from table 1, the slightly modified blended asphalt provided in example 1 of the present invention has excellent properties, and particularly, the index of the product after aging is improved, and the anti-aging property is improved (for example, for most straight-run asphalt, the index of residual ductility at 10 ℃ after aging hardly reaches 10cm, whereas the index of residual ductility after aging of the slightly modified blended asphalt of the present invention exceeds 10cm, even reaches 20cm, and the residual ductility is an important characteristic of the index of asphalt aging).
Example 2
Deoiled asphalt (needle penetration at 25 ℃ of 0-20 dmm and softening point of 60-70 ℃) and vacuum residue oil are adopted(penetration at 25 ℃ of 300-400 dmm, softening point of 20-30 ℃ and flash point of 300-350 ℃) and SBR (white particles, styrene binding capacity of 20-28 percent and bulk density of 0.2g/cm3～0.8g/cm3) Mixing according to the mass ratio of 35: 65: 1; the specific process of mixing is as follows:
stirring the deoiled asphalt and the vacuum residue oil at 150 ℃ for 30min (the rotating speed is 700r/min), adding SBR, and sequentially stirring at 170 ℃ for 10min (the rotating speed is 700r/min), shearing at 180 ℃ for 15min (the rotating speed is 5000r/min), and stirring at 170 ℃ for 60min (the rotating speed is 700r/min) to obtain the uniformly mixed slightly-modified blended asphalt.
The properties of the slightly modified asphalt provided by the example 2 of the present invention are shown in table 2.
Table 2 various performance data for the slightly modified asphalt provided in example 2 of the present invention
As can be seen from table 2, the slightly modified blended asphalt provided in example 2 of the present invention has excellent properties, and particularly, the product index is improved and the aging resistance is improved after the product is aged; compared with the embodiment 1, the use amount of SBR is increased, and the performance index of the product is also improved.
Example 3
Deoiled asphalt (needle penetration at 25 ℃ of 0-20 dmm and softening point of 60-70 ℃), vacuum residue (needle penetration at 25 ℃ of 300-400 dmm, softening point of 20-30 ℃ and flash point of 300-350 ℃) and SBR (white particles with styrene binding capacity of 20-28% and bulk density of 0.2 g/cm)3～0.8g/cm3) Mixing according to the mass ratio of 35: 65: 1.5; the specific process of mixing is as follows:
stirring the deoiled asphalt and the vacuum residue oil at 150 ℃ for 30min (the rotating speed is 700r/min), adding SBR, and sequentially stirring at 170 ℃ for 10min (the rotating speed is 700r/min), shearing at 180 ℃ for 15min (the rotating speed is 5000r/min), and stirring at 170 ℃ for 60min (the rotating speed is 700r/min) to obtain the uniformly mixed slightly-modified blended asphalt.
The properties of the slightly modified asphalt provided by the example 3 of the present invention are shown in table 3.
Table 3 various performance data for the slightly modified asphalt provided in example 3 of this invention
As can be seen from table 3, the slightly modified blended asphalt provided in example 3 of the present invention is excellent in various properties, and particularly, the product index is improved and the aging resistance is improved after the product is aged; compared with the embodiment 2, the use amount of SBR is increased, and the performance index of the product is also improved. In addition, when the amount of SBR was further increased to a level higher than 3 (corresponding to 1.5 in example 3), on the one hand, it did not fall within the scope of the micro-modification, and on the other hand, the product index after aging did not further increase and the cost significantly increased, so the amount of modifier added was unreasonably large.
Comparative example 1
Deoiled asphalt (needle penetration at 25 ℃ of 0-20 dmm and softening point of 60-70 ℃) and vacuum residue (needle penetration at 25 ℃ of 300-400 dmm, softening point of 20-30 ℃ and flash point of 300-350 ℃) are stirred for 30min (rotating speed of 700r/min) at 150 ℃ according to the mass ratio of 35: 65 to obtain the blended asphalt.
The properties of the blended asphalt provided in comparative example 1 were tested and are shown in table 4.
Table 4 various performance data for the blended asphalt provided in comparative example 1
As can be seen from Table 4, the aged product index of the blended asphalt provided in comparative example 1 is low and does not satisfy the technical requirement of No. 70A.
Comparative example 2
Deoiled asphalt (needle penetration degree of 25 ℃ is 0-20 dmm, softening point is 60-70 ℃), vacuum residue oil (needle penetration degree of 25 ℃ is 300-400 dmm, softening point is 20-30 ℃, flash point is 300-350 ℃) and anti-aging agent (black brown liquid, PH7-8, thermal stability is more than 300 ℃) are stirred for 30min (rotating speed is 700r/min) at 150 ℃ according to the mass ratio of 35: 65: 1 to obtain the blended asphalt.
The properties of the blended asphalt provided in comparative example 2 were tested and are shown in table 5.
Table 5 various performance data for the blended asphalt provided in comparative example 2
As can be seen from Table 5, compared with comparative example 1, the performance index of the product of the blended asphalt provided by comparative example 2 is improved to some extent after the anti-aging agent is added, but the product index after aging is still low, and the technical requirement of No. 70A cannot be met.
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 slightly modified blended asphalt is characterized in that the asphalt is obtained by blending deoiled asphalt and vacuum residue oil and then performing SBR slight modification;
the mass ratio of the deoiled asphalt to the vacuum residue to the SBR is (20-40): (60-80): (0.5 to 3).
2. The slightly modified blended asphalt according to claim 1, wherein the deoiled asphalt has a penetration at 25 ℃ of 0 to 30dmm and a softening point of 60 ℃ or higher.
3. The slightly modified tempered asphalt of claim 1, wherein the vacuum residue has a penetration of 300dmm or more at 25 ℃, a softening point of 20 ℃ or more, and a flash point of 300 ℃ or more.
4. The micro-modified blended asphalt of claim 1, wherein the SBR has a styrene binding amount of 20 to 30% and a bulk density of 0 to 1g/cm3。
5. The slightly modified blended asphalt according to claim 1, wherein the mass ratio of the deoiled asphalt, the vacuum residue and the SBR is (30-40): (60-70): (0.5 to 1.5).
6. The preparation method of the slightly modified blended asphalt as claimed in any one of claims 1 to 5, which is characterized by comprising the following steps:
a) blending the deoiled asphalt and the vacuum residue oil to obtain blended asphalt;
b) and b) carrying out micro-modification on the blended asphalt obtained in the step a) by using SBR to obtain micro-modified blended asphalt.
7. The method according to claim 6, wherein the blending in step a) is carried out by stirring; the stirring temperature is 100-180 ℃, the stirring time is 20-200 min, and the rotating speed is 500-1000 r/min.
8. The preparation method according to claim 6, wherein the micro-modification in step b) is specifically performed by:
adding SBR into the blended asphalt obtained in the step a), and sequentially carrying out primary stirring, shearing and secondary stirring to obtain the slightly modified blended asphalt.
9. The preparation method according to claim 8, wherein the temperature of the first stirring is 150-200 ℃, the time is 5-20 min, and the rotating speed is 500-1000 r/min;
the temperature of the second stirring is 150-200 ℃, the time is 30-100 min, and the rotating speed is 500-1000 r/min.
10. The preparation method according to claim 8, wherein the shearing temperature is 150-250 ℃, the time is 10-20 min, and the rotating speed is 3000-7000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460125.4A CN112592593A (en) | 2020-12-11 | 2020-12-11 | Slightly modified blended asphalt and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460125.4A CN112592593A (en) | 2020-12-11 | 2020-12-11 | Slightly modified blended asphalt and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112592593A true CN112592593A (en) | 2021-04-02 |
Family
ID=75192621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460125.4A Pending CN112592593A (en) | 2020-12-11 | 2020-12-11 | Slightly modified blended asphalt and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112592593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116554699A (en) * | 2023-06-16 | 2023-08-08 | 山东海韵沥青有限公司 | Low-temperature performance improver for waterproof asphalt, preparation method of low-temperature performance improver and waterproof asphalt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418128A (en) * | 2007-10-26 | 2009-04-29 | 中国石油化工股份有限公司 | Road asphalt composite and preparation method thereof |
| DE102009044771A1 (en) * | 2009-12-04 | 2011-06-09 | Bühler, Hans-Joachim, Dr. | Producing polymer modified bitumen, useful for producing modified asphalt, roofing sheets or other bitumen containing construction products, comprises heating bitumen, mixing elastomer in bitumen, and optionally adding crosslinking agent |
| CN104592767A (en) * | 2013-10-31 | 2015-05-06 | 中国石油化工股份有限公司 | Method for producing heavy-duty road asphalt |
-
2020
- 2020-12-11 CN CN202011460125.4A patent/CN112592593A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418128A (en) * | 2007-10-26 | 2009-04-29 | 中国石油化工股份有限公司 | Road asphalt composite and preparation method thereof |
| DE102009044771A1 (en) * | 2009-12-04 | 2011-06-09 | Bühler, Hans-Joachim, Dr. | Producing polymer modified bitumen, useful for producing modified asphalt, roofing sheets or other bitumen containing construction products, comprises heating bitumen, mixing elastomer in bitumen, and optionally adding crosslinking agent |
| CN104592767A (en) * | 2013-10-31 | 2015-05-06 | 中国石油化工股份有限公司 | Method for producing heavy-duty road asphalt |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116554699A (en) * | 2023-06-16 | 2023-08-08 | 山东海韵沥青有限公司 | Low-temperature performance improver for waterproof asphalt, preparation method of low-temperature performance improver and waterproof asphalt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1313566C (en) | Waste rubber powder modified asphalt and its prepn process | |
| CN103073903A (en) | Rubber powder-modified asphalt and preparation method thereof | |
| CN105482475A (en) | Composite modified hard asphalt and preparation method thereof | |
| CN103554926A (en) | Low-strength and high-grade road asphalt and preparation method thereof | |
| CN102249599B (en) | Method for preparing rubber asphalt by using discarding tire rubber block | |
| CN108192363B (en) | Preparation technology and low-temperature performance improvement method of waterborne epoxy resin modified emulsified asphalt | |
| CN102453335A (en) | Environment-friendly oil-resistant asphalt pavement material and preparation method thereof | |
| CN105504844A (en) | Environment-friendly asphalt reclaiming agent and preparing method and using method thereof | |
| CN108179017B (en) | Blended asphalt and preparation method thereof | |
| CN109535747B (en) | No. 30 hard road asphalt and preparation method thereof | |
| CN112430396A (en) | High-grade blended asphalt and preparation method thereof | |
| CN112592593A (en) | Slightly modified blended asphalt and preparation method thereof | |
| CN102443239A (en) | Oil-resistant road asphalt modifier and preparation method thereof | |
| CN113185847A (en) | Environment-friendly economical asphalt composition and application thereof | |
| CN1896143A (en) | Thermal-storage-stabilized rubber-powdery asphalt composition and its preparation | |
| CN109651830A (en) | A kind of asphalt mixed material modifier and preparation method thereof | |
| CN110054908B (en) | Biomass material-based regenerated asphalt and preparation method thereof | |
| CN102250475A (en) | Modified production method of asphalt | |
| CN111378465B (en) | Matrix asphalt, modified asphalt and preparation method | |
| CN109207182A (en) | A kind of method of deasphalted oil production road asphalt | |
| CN115353665A (en) | Asphalt regenerant and preparation method thereof | |
| CN114958017A (en) | Modified matrix asphalt and preparation method thereof | |
| CN113201226A (en) | Modified asphalt mixed with waste engine oil residues and waste rubber and preparation method thereof | |
| CN111205661B (en) | Rubber asphalt modifier, modified asphalt, asphalt mixture, and preparation and application thereof | |
| CN110845857B (en) | High-performance special SBS (styrene butadiene styrene) modified asphalt and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210402 |