CN113025070A - Preparation method of high-viscosity modified asphalt - Google Patents
Preparation method of high-viscosity modified asphalt Download PDFInfo
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- CN113025070A CN113025070A CN202110285365.3A CN202110285365A CN113025070A CN 113025070 A CN113025070 A CN 113025070A CN 202110285365 A CN202110285365 A CN 202110285365A CN 113025070 A CN113025070 A CN 113025070A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 120
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000002156 mixing Methods 0.000 claims abstract description 40
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 238000010008 shearing Methods 0.000 claims abstract description 28
- 238000011161 development Methods 0.000 claims abstract description 26
- 239000011159 matrix material Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000003607 modifier Substances 0.000 claims abstract description 19
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000006184 cosolvent Substances 0.000 claims abstract description 16
- 239000010692 aromatic oil Substances 0.000 claims description 8
- 239000003208 petroleum Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009776 industrial production Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000017537 Vaccinium myrtillus Nutrition 0.000 description 1
- 244000078534 Vaccinium myrtillus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Working-Up Tar And Pitch (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention belongs to the field of asphalt, and particularly relates to a preparation method of high-viscosity modified asphalt, which comprises the following steps: a) shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain initial modified asphalt; the temperature of the shearing and mixing is 160-190 ℃, the rotating speed is 3000-6000 r/min, and the time is 30-120 min; b) mixing the initial modified asphalt, the cosolvent and the stabilizer, and then stirring for development to obtain high-viscosity modified asphalt; the temperature of stirring development is 160-195 ℃, the rotating speed is 100-2000 r/min, and the time is 30-120 min. The invention optimizes and designs the preparation raw materials, process steps and process conditions of the modified asphalt, particularly adds the asphalt resin master batch in the initial stage of the preparation of the modified asphalt, and finally prepares the high-viscosity modified asphalt.
Description
Technical Field
The invention belongs to the field of asphalt, and particularly relates to a preparation method of high-viscosity modified asphalt.
Background
Modern traffic develops rapidly, and with the increase of mileage, the improvement of grade, the improvement of road conditions of our country, combine the characteristics of large traffic density, vehicle axle load, short intermittent loading action, high speed and canalization of modern high-grade roads, the asphalt pavement has the problems of high-temperature rutting, low-temperature cracking, skid resistance attenuation, noise pollution and the like. Under the circumstances, how to improve the use quality of the road surface and provide safer, more comfortable and faster road traffic for the society becomes a new target pursued by the road traffic department in China. Therefore, the requirements of modern traffic can be met only by continuously improving the road performance of the asphalt, improving the adhesion between the asphalt and the aggregate and prolonging the durability of the asphalt pavement in the aspect of technical performance.
In recent years, the drainage asphalt mixture is widely applied to high-grade highways and urban expressways of a plurality of provinces and cities such as Beijing, Shanghai, Guangdong and the like in China by virtue of good road performance such as drainage, noise reduction, skid resistance and the like and environmental protection concept. However, if the porosity of such a road surface is as large as possible, the durability of the road surface cannot be sufficiently maintained unless the porosity exceeds a certain limit, and the function of the drainage road surface is deteriorated due to the destruction or clogging of the voids, so that the most critical material for laying the drainage road surface, which is important for maintaining the balance between the function and the durability, is an asphalt cement, and the conventional modified asphalt as a binder for the drainage road surface has problems of low viscosity, insufficient aggregate-coating thickness, low road surface durability under heavy traffic, and difficulty in securing a large porosity. In addition, the water-permeable road surface has a large void ratio, and the interior of the road surface is easily affected by water to cause phenomena such as peeling, scattering of coarse aggregates, and pits. Thus, high viscosity asphalt is a necessary choice.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for preparing high viscosity modified asphalt, which can significantly improve the indexes of the asphalt, such as viscosity, softening point, ductility, etc., and has a simple process flow, and is suitable for industrial production.
1. A preparation method of high-viscosity modified asphalt comprises the following steps:
a) shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain initial modified asphalt;
the temperature of the shearing and mixing is 160-190 ℃; the rotating speed of the shearing and mixing is 3000-6000 r/min; the shearing and mixing time is 30-120 min;
b) mixing the initial modified asphalt, the cosolvent and the stabilizer, and then stirring for development to obtain high-viscosity modified asphalt;
the temperature of stirring development is 160-195 ℃; the rotating speed of the stirring development is 100-2000 r/min; the stirring development time is 30-120 min.
Preferably, step a) specifically comprises:
a1) stirring and mixing the matrix asphalt and the asphalt resin master batch to obtain initial matrix asphalt;
a2) and shearing and mixing the initial matrix asphalt and the SBS modifier to obtain the initial modified asphalt.
Preferably, in the step a1), the stirring and mixing temperature is 120-190 ℃; the rotating speed of stirring and mixing is 100-2000 r/min; the stirring and mixing time is not more than 120 min.
Preferably, the base asphalt is grade-A road petroleum asphalt No. 70.
Preferably, the softening point of the asphalt resin master batch is 90-95 ℃.
Preferably, the mass ratio of the matrix asphalt to the asphalt resin master batch is 500: (5-30).
Preferably, the SBS modifier has a designation of 791H.
Preferably, the mass ratio of the base asphalt to the SBS modifier is 500: (10-40).
Preferably, the cosolvent is aromatic oil; the stabilizer is under the trade name ZQ-WDJ.
Preferably, the amount of the cosolvent is 1-5 wt% of the mass of the matrix asphalt; the dosage of the stabilizer is 0.2-0.3 wt% of the mass of the matrix asphalt.
Compared with the prior art, the invention provides a preparation method of high-viscosity modified asphalt. The preparation method provided by the invention comprises the following steps: a) shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain initial modified asphalt; the temperature of the shearing and mixing is 160-190 ℃; the rotating speed of the shearing and mixing is 3000-6000 r/min; the shearing and mixing time is 30-120 min; b) mixing the initial modified asphalt, the cosolvent and the stabilizer, and then stirring for development to obtain high-viscosity modified asphalt; the temperature of stirring development is 160-195 ℃; the rotating speed of the stirring development is 100-2000 r/min; the stirring development time is 30-120 min. The invention optimizes and designs the preparation raw materials, process steps and process conditions of the modified asphalt, particularly adds the asphalt resin master batch in the initial stage of the preparation of the modified asphalt, and finally prepares the high-viscosity modified asphalt. The preparation method provided by the invention can obviously improve the indexes of the asphalt, such as viscosity, softening point, ductility and the like; the method has simple process flow and low cost, and is suitable for industrial production.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all 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 preparation method of high-viscosity modified asphalt, which comprises the following steps:
a) shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain initial modified asphalt;
b) and mixing the initial modified asphalt, the cosolvent and the stabilizer, and then stirring for development to obtain the high-viscosity modified asphalt.
In the preparation method provided by the invention, the initial modified asphalt is prepared by taking the matrix asphalt, the asphalt resin master batch and the SBS modifier as raw materials. Wherein the base asphalt is preferably grade-A70 road petroleum asphalt; the softening point of the asphalt resin master batch is preferably 90-95 ℃, and specifically can be 90 ℃, 91 ℃, 92 ℃, 93 ℃, 94 ℃ or 95 ℃; the asphalt resin master batch is preferably provided by Dongying morning recycling; the SBS modifier is preferably 791H in the brand, and is provided by the potentization. In the present invention, the mass ratio of the matrix asphalt to the asphalt resin master batch is preferably 500: (5-30), specifically 500:5, 500:6, 500:7, 500:8, 500:9, 500:10, 500:11, 500:12, 500:13, 500:14, 500:15, 500:16, 500:17, 500:18, 500:19, 500:20, 500:21, 500:22, 500:23, 500:24, 500:25, 500:26, 500:27, 500:28, 500:29 or 500: 30; the mass ratio of the base asphalt to the SBS modifier is preferably 500: (10-40), specifically 500:10, 500:11, 500:12, 500:13, 500:14, 500:15, 500:16, 500:17, 500:18, 500:19, 500:20, 500:21, 500:22, 500:23, 500:24, 500:25, 500:26, 500:27, 500:28, 500:29, 500:30, 500:31, 500:32, 500:33, 500:34, 500:35, 500:36, 500:37, 500:38, 500:39, or 500: 40.
In the preparation method provided by the invention, the initial modified asphalt can be prepared by mixing in a one-step method or a two-step method. In the invention, the one-step method refers to directly shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain the initial modified asphalt. Wherein the temperature of the shearing and mixing is 160-190 ℃, and specifically can be 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃ or 190 ℃; the rotating speed of the shearing and mixing is 3000-6000 r/min, and can be 3000r/min, 3500r/min, 4000r/min, 4500r/min, 5000r/min, 5500r/min or 6000 r/min; the shearing and mixing time is 30-120 min, specifically 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min or 120 min. In the invention, the two-step method is that the matrix asphalt and the asphalt resin master batch are stirred and mixed to obtain initial matrix asphalt; and shearing and mixing the initial matrix asphalt and the SBS modifier to obtain the initial modified asphalt. Wherein the temperature of the stirring and mixing is preferably 120-190 ℃, and specifically can be 120 ℃, 130 ℃, 138 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃ or 190 ℃; the rotation speed of stirring and mixing is preferably 100-2000 r/min, and specifically can be 100r/min, 200r/min, 300r/min, 400r/min, 500r/min, 600r/min, 700r/min, 800r/min, 900r/min, 1000r/min, 1200r/min, 1500r/min, 1700r/min or 2000 r/min; the stirring and mixing time is preferably not more than 120min, and specifically may be 10min, 15min, 20min, 25min, 30min, 35min, 40min, 45min, 50min, 55min, 60min, 70min, 80min or 90 min; the temperature, speed and time of the shear mixing are the same as those described above for the one-step process and will not be described further herein.
In the preparation method provided by the invention, after the initial modified asphalt is obtained, the initial modified asphalt, the cosolvent and the stabilizer are mixed. The cosolvent is preferably aromatic oil, and the viscosity of the aromatic oil at 100 ℃ is preferably 25-35 mm2The aromatic oil is preferably provided by Shandongfu chemical industry; the grade of the stabilizer is preferably ZQ-WDJ, and the stabilizer with the grade is provided by Dongyun Fengbo mountain bilberry oil technology company Limited; the amount of the cosolvent is preferably 1-5 wt% of the mass of the matrix asphalt, and specifically can be 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%, 4.5 wt% or 5 wt%; the stabilizer is preferably used in an amount of 0.2 to 0.3 wt%, specifically 0.2 wt%, 0.21 wt%, 0.22 wt%, 0.23 wt%, 0.24 wt%, 0.25 wt%, 0.26 wt%, 0.27 wt%, 0.28 wt%, 0.29 wt%, or 0.3 wt%, based on the mass of the base asphalt.
In the preparation method provided by the invention, after the initial modified asphalt, the cosolvent and the stabilizer are mixed, stirring development is carried out. Wherein the temperature of the stirring development is 160-195 ℃, and specifically can be 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ or 195 ℃; the rotation speed of stirring development is 100-2000 r/min, and specifically can be 100r/min, 200r/min, 300r/min, 400r/min, 500r/min, 600r/min, 700r/min, 800r/min, 900r/min, 1000r/min, 1200r/min, 1500r/min, 1700r/min or 2000 r/min; the stirring development time is 30-120 min, specifically 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min or 120 min. After the stirring development is finished, the high-viscosity modified asphalt is obtained.
The preparation method provided by the invention optimizes and designs the preparation raw materials, process steps and process conditions of the modified asphalt, and particularly adds the asphalt resin master batch in the initial stage of the preparation of the modified asphalt to finally prepare the high-viscosity modified asphalt. The preparation method provided by the invention can obviously improve the indexes of the asphalt, such as viscosity, softening point, ductility and the like; the method has simple process flow and low cost, and is suitable for industrial production.
For the sake of clarity, the following examples are given in detail.
Example 1
Adding 500g of sea rhyme No. 70A road petroleum asphalt and 15g of asphalt resin master batch (softening point 93 ℃, manufacturer: Dongying morning chemical industry) into a 1L enamel cylinder, and stirring for 30min at the rotating speed of 700r/min and the temperature controlled by a heating sleeve at 138 ℃; after stirring, adding 20g of SBS modifier (the brand: 791H, manufacturer: ba ling petrochemical) into the obtained sample, and shearing at 180 ℃ at the rotating speed of 4500r/min for 50 min; after shearing, adding a cosolvent (aromatic oil with the viscosity of 25-35 mm at 100 ℃) into the obtained sample2S, manufacturer: shandongfu Rundao chemical industry) 10g, stabilizer (trade mark: ZQ-WDJ, manufacturer: boyue) 1.25g, controlling the temperature at 180 ℃, and stirring for development, wherein the rotating speed is 1000r/min, and the development time is 70min, so as to obtain the high-viscosity modified asphalt.
Example 2
Adding 500g of sea rhyme No. 70A road petroleum asphalt, 20g of SBS modifier (the brand is 791H, the manufacturer: ba ling petrochemical), 15g of asphalt resin master batch (the softening point is 93 ℃, the manufacturer: Dongying morning chemical industry) into a 1L enamel cylinder, and shearing for 50min at the rotating speed of 4500r/min at the temperature of 180 ℃ by adopting a heating sleeve; after shearing, adding the obtained sample into a cosolvent (aromatic oil, the viscosity of 100 ℃ is 25-35 mm)2S, manufacturer: shandongfu Rundao Hua10g, stabilizer (trade mark: ZQ-WDJ, manufacturer: boyue) 1.25g, controlling the temperature at 180 ℃, and stirring for development, wherein the rotating speed is 1000r/min, and the development time is 70min, so as to obtain the high-viscosity modified asphalt.
Comparative example
Adding 500g of sea rhyme No. 70 grade A road petroleum asphalt and 20g of SBS modifier (the brand is 791H, manufacturer: ba ling petrochemical) into a 1L enamel cylinder, and shearing for 50min at a rotating speed of 4500r/min at 180 ℃ by adopting a heating sleeve; after shearing, adding the obtained sample into a cosolvent (aromatic oil, the viscosity of 100 ℃ is 25-35 mm)2S, manufacturer: shandongfu Rundao chemical industry) 10g, stabilizer (trade mark: ZQ-WDJ, manufacturer: boyue) 1.25g, controlling the temperature to be 185 ℃, and stirring for development, wherein the rotating speed is 1000r/min, and the development time is 70min, so as to obtain the modified asphalt.
Performance detection
The properties of the modified asphalts obtained in examples 1 and 2 and comparative example were measured, and the results are shown in table 1:
TABLE 1 Property test results for modified Pitch
| Test items | Index requirement | Example 1 | Example 2 | Comparative case |
| Penetration (25 ℃, 100g, 5s), 0.1mm | ≮40 | 42 | 45 | 47 |
| Softening point (ring and ball method), DEG C | ≮70 | 84.1 | 80.0 | 75.4 |
| Ductility (10 ℃, 5cm/min), cm | ≮20 | 38.3 | 37.3 | 34.6 |
| Kinematic viscosity (135 ℃ C.), Pa.s | / | 2.27 | 2.09 | 1.45 |
| Kinematic viscosity (175 ℃), Pa.s | ≮1.0 | 0.390 | 0.362 | 0.291 |
As can be seen from Table 1, the high-viscosity modified asphalt prepared by the invention has a higher softening point, which indicates that the high-temperature performance is better, and the ductility is higher, which indicates that the low-temperature performance is better, and the viscosity is higher, which indicates that the high-viscosity modified asphalt has good adhesion with stone materials.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A preparation method of high-viscosity modified asphalt comprises the following steps:
a) shearing and mixing the matrix asphalt, the asphalt resin master batch and the SBS modifier to obtain initial modified asphalt;
the temperature of the shearing and mixing is 160-190 ℃; the rotating speed of the shearing and mixing is 3000-6000 r/min; the shearing and mixing time is 30-120 min;
b) mixing the initial modified asphalt, the cosolvent and the stabilizer, and then stirring for development to obtain high-viscosity modified asphalt;
the temperature of stirring development is 160-195 ℃; the rotating speed of the stirring development is 100-2000 r/min; the stirring development time is 30-120 min.
2. The method according to claim 1, wherein step a) comprises in particular:
a1) stirring and mixing the matrix asphalt and the asphalt resin master batch to obtain initial matrix asphalt;
a2) and shearing and mixing the initial matrix asphalt and the SBS modifier to obtain the initial modified asphalt.
3. The preparation method according to claim 2, wherein in the step a1), the temperature of stirring and mixing is 120-190 ℃; the rotating speed of stirring and mixing is 100-2000 r/min; the stirring and mixing time is not more than 120 min.
4. The method of claim 1, wherein the base asphalt is grade 70 a road petroleum asphalt.
5. The method according to claim 1, wherein the asphalt resin masterbatch has a softening point of 90 to 95 ℃.
6. The method according to claim 1, wherein the mass ratio of the base asphalt to the asphalt resin master batch is 500: (5-30).
7. The method of claim 1, wherein the SBS modifier is under the designation 791H.
8. The preparation method according to claim 1, wherein the mass ratio of the base asphalt to the SBS modifier is 500: (10-40).
9. The preparation method according to claim 1, wherein the cosolvent is an aromatic oil; the stabilizer is under the trade name ZQ-WDJ.
10. The preparation method of claim 1, wherein the cosolvent is used in an amount of 1-5 wt% of the mass of the matrix asphalt; the dosage of the stabilizer is 0.2-0.3 wt% of the mass of the matrix asphalt.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114854369A (en) * | 2022-04-26 | 2022-08-05 | 天津市禹神建筑防水材料有限公司 | Adhesive for metal tile metal layer and modified asphalt reinforcing layer and preparation method thereof |
| CN115637053A (en) * | 2022-09-02 | 2023-01-24 | 四川东方雨虹建筑材料有限公司 | Rapid preparation method of SBS modified asphalt |
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