CN115710432B - Hydrophobic durable high-viscosity modified asphalt and preparation method thereof - Google Patents
Hydrophobic durable high-viscosity modified asphalt and preparation method thereof Download PDFInfo
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- 239000003381 stabilizer Substances 0.000 claims abstract description 22
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- 238000010438 heat treatment Methods 0.000 claims description 9
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- 238000000034 method Methods 0.000 claims description 6
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- HEBKCHPVOIAQTA-QWWZWVQMSA-N D-arabinitol Chemical compound OC[C@@H](O)C(O)[C@H](O)CO HEBKCHPVOIAQTA-QWWZWVQMSA-N 0.000 claims description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- JVWLUVNSQYXYBE-UHFFFAOYSA-N Ribitol Natural products OCC(C)C(O)C(O)CO JVWLUVNSQYXYBE-UHFFFAOYSA-N 0.000 claims description 2
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims description 2
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- HEBKCHPVOIAQTA-ZXFHETKHSA-N ribitol Chemical compound OC[C@H](O)[C@H](O)[C@H](O)CO HEBKCHPVOIAQTA-ZXFHETKHSA-N 0.000 claims description 2
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of road asphalt, in particular to hydrophobic durable high-viscosity modified asphalt and a preparation method thereof, wherein the hydrophobic durable high-viscosity modified asphalt comprises the following components: 85-90 parts of matrix asphalt, 4.0-6.5 parts of polymer modifier, 0.1-1.0 part of hydrophobic weather-resistant main agent, 0.4-2.0 parts of hydrophobic weather-resistant auxiliary agent A, 0.8-1.5 parts of hydrophobic weather-resistant auxiliary agent B, 1.0-5.0 parts of organic viscosity reducer and 0.1-1.0 parts of stabilizer.
Description
Technical Field
The invention relates to the technical field of road asphalt, in particular to hydrophobic durable high-viscosity modified asphalt and a preparation method thereof.
Background
The traditional OGFC drainage type asphalt concrete pavement is in a high-performance asphalt pavement structure, and good drainage performance in rainy weather is achieved by arranging larger porosity (15% -20%) on the asphalt pavement, so that safety and comfort of running of a vehicle in rainy weather are effectively guaranteed. However, in the long-term service process of the drainage type pavement, the pores of the pavement structure layer are blocked to different degrees under the influence of dust deposition, and the drainage performance and the noise reduction performance of the pavement are greatly reduced. Early foreign use of a small pore structure layer for prevention, but the phenomenon of pore blockage cannot be effectively avoided, the pavement drainage capacity and the sound absorption and noise reduction capacity are greatly reduced along with the pore blockage, and corresponding application cannot be met.
The method for preparing the super-hydrophobic solution by using the silane compound and the nano white carbon black in the patent CN112012073A has the advantages that the self-cleaning function is proposed for the problem of pore blocking of the drainage pavement at home and abroad, the super-hydrophobic solution is sprayed on the pore structure surfaces of the upper layer and the lower layer of the double-layer drainage asphalt pavement through a high-pressure spray gun, so that the surface of the asphalt mixture has the super-hydrophobic function, meanwhile, the water flow in pores is utilized for cleaning, the self-cleaning effect is achieved, and the drainage performance of the double-layer drainage asphalt pavement is improved. Has better hydrophobic effect, simple operation and convenient use. But use solution to spray on the road surface, more difficult satisfy the surface course hydrophobic requirement behind the road surface wearing and tearing, the glutinous layer oil in the double-deck road surface structure can cover the hydrophobic top layer of lower floor simultaneously, leads to lower floor to lose hydrophobic character, does not possess better whole hydrophobic effect, and the dust also can stay in the hole pit after the rainwash, and the deposit is stopped up, leads to the surface course to be difficult to satisfy the user demand gradually. The patent CN108102398B uses the combination of biological asphalt and hard asphalt, the hard asphalt is modified by a low-mixing amount warm mix agent, the biological asphalt is modified by an antioxidant, and the biological asphalt is modified by the combination of the biological asphalt and the antioxidant, so that the biological asphalt has better ageing resistance and warm mix characteristics, but because the asphalt body is black and is easy to reflect sunlight, most of the photocatalyst such as titanium dioxide is suspended in the asphalt, the catalyst on the surface of the asphalt film layer is less, the degradation effect can be exerted only by absorbing sunlight, the degradation function is reduced, and the self-cleaning reaction is difficult to promote. At present, the super-hydrophobic and self-cleaning technology is mainly applied to the field of traffic pavement and mainly comprises a surface coating and a protective layer of asphalt pavement mixture, but the coating cannot penetrate into the bottom of the pavement, and for drainage type asphalt pavement, water flow is mainly discharged through pores of the asphalt mixture, so that the whole drainage application requirement is difficult to meet.
Based on the defects of the modified asphalt, the inventor based on the rich practical experience and expertise of the design and manufacture of the product for many years and the application of the theory, actively researches and innovates, and creates the hydrophobic durable high-viscosity modified asphalt and the preparation method thereof, so that the hydrophobic durable high-viscosity modified asphalt has higher practicability.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the hydrophobic durable high-viscosity modified asphalt and the preparation method thereof have the advantages that the asphalt has excellent hydrophobic property, low viscosity and excellent ageing resistance through optimizing components and processes.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the hydrophobic durable high-viscosity modified asphalt comprises the following components in parts by weight:
85-90 parts of matrix asphalt
4.0 To 6.5 portions of macromolecular modifier
0.1 To 1.0 part of hydrophobic weather-proof main agent
0.4 To 2.0 parts of hydrophobic weather-resistant auxiliary agent A
0.8 To 1.5 portions of hydrophobic weather-resistant auxiliary agent B
1.0 To 5.0 parts of organic viscosity reducer
0.1 To 1.0 part of stabilizer
Further, the matrix asphalt is any one or more of 70# straight asphalt and 90# straight asphalt, the asphalt is produced by refining heavy crude oil, and the asphalt has high quality content, high temperature performance and aging resistance.
Further, the polymer modifier is any one or more of styrene-butadiene rubber, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene block copolymer and styrene-isoprene-styrene.
Furthermore, the hydrophobic weather-proof main agent is any one or more of graphite-like carbon nitride, nano titanium dioxide and silicon dioxide nano particles, molecular oxygen is effectively activated through the graphite-like carbon nitride, and super-oxygen free radicals are generated for photocatalytic conversion of organic functional groups and photocatalytic degradation of organic pollutants, so that the self-cleaning function can be achieved by effectively cleaning organic matters such as leaves and paper scraps accumulated in pores in high-viscosity asphalt.
Further, the hydrophobic weather-resistant auxiliary agent A is one or more of PE wax, fischer-Tropsch wax, oxidized polyethylene wax, palm wax and paraffin wax, the wax materials are easy to adsorb with the nano materials, meanwhile, the viscosity reduction property is good, the dispersion of the nano materials is facilitated under the shearing process condition, the agglomeration phenomenon caused by the large specific surface area of the nano materials is effectively solved, meanwhile, the unique physical precipitation property of the nano materials is carried out at about 100 ℃, and the adhesion rate of the nano materials on the surface of an asphalt film layer is effectively improved.
Further, the hydrophobic weather-resistant auxiliary agent B is any one or more of threitol, xylitol, sorbitol, arabitol, ribitol and erythritol, the hydrophobic weather-resistant auxiliary agent B is a phase-change material, and is converted into a liquid state at high temperature, the high-temperature viscosity of the modified asphalt is greatly reduced, the modified asphalt is separated out of the modified asphalt and the hydrophobic weather-resistant main agent once in the process of cooling to normal temperature, the nano material can form a micro-nano concave-convex layer on the surface of the asphalt under the action of twice wrapping and separating out, the micro-nano rough structure can greatly improve the contact angle of water drops on the surface of the asphalt, so that the water drops are extremely easy to roll off, a high hydrophobic effect similar to a lotus leaf effect is achieved, the sugar alcohol material and the wax material are finally formed into a light-transmitting surface layer with the graphite-like carbon nitride and the like component, the light-transmitting surface layer can enable the nano material to be effectively contacted with sunlight, and the self-cleaning function of the nano material such as the graphite-like carbon nitride is excited.
Furthermore, the organic viscosity reducer is aromatic oil, the aromatic oil is petroleum refined product, the dispersibility of the aromatic oil and asphalt is good, the unique high aromatic hydrocarbon component of the aromatic oil can be well mutually dissolved with components in the asphalt, swelling of the modifier can be promoted to form a network interpenetrating structure, the swelling effect of the modifier is improved, and the development time is shortened.
Further, the stabilizer is sulfur, and sulfur components in the sulfur can be subjected to displacement reaction with hydrogen bonds in the modifier in the modified asphalt, so that the stability of a space network system of the modifier and the asphalt is improved, the phenomena of thermal decomposition and segregation are not easy to occur, and the storage stability of the modified asphalt is improved.
The invention also discloses a preparation method of the hydrophobic durable high-viscosity modified asphalt, which is used for preparing the hydrophobic durable high-viscosity modified asphalt and comprises the following steps:
S1, heating matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding a high polymer modifier and a hydrophobic weather-resistant main agent, shearing for 0.5-1.0 h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
s2, adding an organic viscosity reducer, and stirring and developing for 0.5-1.0h;
s3, adding a stabilizer, and stirring and developing for 3-5 hours at 175+/-5 ℃;
s4, adding the hydrophobic weather-resistant auxiliary agent A and the hydrophobic weather-resistant auxiliary agent B, and stirring and developing for 1-3 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
The beneficial effects of the invention are as follows: the hydrophobic durable high-viscosity asphalt provided by the invention is different from the existing means for improving the mixing amount of the modifier and the like, nano particles are adopted as hydrophobic weather-resistant main agents, wax materials and sugar alcohol materials are respectively used as auxiliary agents, the viscosity improvement effect of the nano particles on the modified asphalt is better under the condensation crystallization effect of the sugar alcohol materials, the nano materials are easier to adsorb light components in the asphalt because of higher activity, the viscosity of the asphalt is higher, the high-temperature viscosity of the modified asphalt is reduced by utilizing the phase change property of the wax materials, the low-temperature viscosity of the asphalt is improved, the nano materials are uniformly dispersed by shearing together with the nano materials, the light components in the asphalt are adsorbed by the nano materials, the light components in the asphalt are adsorbed and fixed on the surface layer of a wax film under the two precipitation effects of the sugar alcohol materials and the wax materials, the components in contact with stone are relatively increased, the asphalt components and the modifier components are combined with the high-molecular modifier, the viscosity of the prepared high-viscosity asphalt is higher than 200000Pa & s, the softening point is higher than 85 ℃, the low-temperature ductility is higher than 30cm, the post-aging effect is greatly reduced by 15cm, and the social benefit is better, the social benefit is reduced, and the social benefit is better, and the cost is reduced.
Detailed Description
In the examples of the present invention, commercially available materials were sourced as follows:
SBS modifier: modifier 791h of Hunan Yueyang Baling petrochemical Co.Ltd
Graphite-like phase carbon nitride: guangzhou City full-automatic chemical engineering Co., ltd
Nano titanium dioxide: beijing De Kodak gold technology Co.Ltd
PE wax: qingdao Sauno chemical Co., ltd
Oxidized polyethylene wax: qingdao Sauno chemical Co., ltd
Threitol: shanghai Source leaf Biotechnology Co Ltd
Erythritol: shandong ternary biotechnology Co Ltd
Aromatic oil: wuhan Kang Run chemical industry Limited liability company
Sulfur stabilizer: luoyang Yuchen petrochemical Co.Ltd
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
The specific preparation steps of the hydrophobic durable high-viscosity modified asphalt provided by the embodiment include:
S1, weighing 884g of Sitai70 # matrix asphalt, 20g of PE wax, 5g of nano titanium dioxide, 40g of SBS modifier, 15g of threitol, 10g of aromatic oil and 1g of sulfur stabilizer;
S2, heating 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding SBS modifier, PE wax and nano titanium dioxide, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
s3, adding aromatic oil, and stirring and developing for 0.5h;
s4, adding a sulfur stabilizer, and stirring and developing for 3 hours at 175+/-5 ℃;
S5, adding threitol, and stirring and developing for 2 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
Example 2
The specific preparation steps of the hydrophobic durable high-viscosity modified asphalt provided by the embodiment include:
S1, weighing 883g of double dragon 90# matrix asphalt, 4g of oxidized polyethylene wax, 1g of graphite-like phase carbon nitride particles, 65g of SBS modifier, 15g of erythritol, 30g of aromatic hydrocarbon oil and 2g of sulfur stabilizer;
S2, heating the 90# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, oxidized polyethylene wax and graphite-like carbon nitride, shearing for 1.0h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
s3, adding aromatic oil, and stirring and developing for 0.5h;
s4, adding a sulfur stabilizer, and stirring and developing for 5 hours at 175+/-5 ℃;
S5, adding erythritol, and stirring and developing for 3 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
Example 3
The specific preparation steps of the hydrophobic durable high-viscosity modified asphalt provided by the embodiment include:
S1, weighing 867g of double dragon 90# matrix asphalt, 10g of PE wax, 10g of nano titanium dioxide, 65g of SBS modifier, 8g of erythritol, 50g of aromatic oil and 10g of sulfur stabilizer;
S2, heating the 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, PE wax and nano titanium dioxide, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
s3, adding aromatic oil, and stirring and developing for 0.5h;
s4, adding a sulfur stabilizer, and stirring and developing for 4 hours at 175+/-5 ℃;
s5, adding erythritol, and stirring and developing for 2 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
Example 4
The specific preparation steps of the hydrophobic durable high-viscosity modified asphalt provided by the embodiment include:
S1, weighing 878g of Sitai70 # matrix asphalt, 5g of polyethylene wax, 5g of nano titanium dioxide, 55g of SBS modifier, 15g of erythritol, 25g of aromatic oil and 2g of sulfur stabilizer;
S2, heating the 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, polyethylene wax and nano titanium dioxide, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
S3, adding aromatic oil, and stirring and developing for 1.0h;
s4, adding a sulfur stabilizer, and stirring and developing for 3 hours at 175+/-5 ℃;
S5, erythritol is added, and stirring and developing are carried out for 1.5 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
Comparative example 1
The specific preparation steps of the modified asphalt provided by the embodiment comprise:
S1, weighing 55g of linear SBS modifier, 918g of double dragon 90# matrix asphalt, 25g of aromatic oil and 2g of sulfur stabilizer;
s2, heating 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
S3, adding aromatic oil, and stirring and developing for 1.0h;
s4, adding a sulfur stabilizer, and stirring and developing for 4.5 hours at 175+/-5 ℃ to obtain the modified asphalt.
Comparative example 2
The specific preparation steps of the modified asphalt provided by the embodiment comprise:
S1, weighing 55g of linear SBS modifier, 903g of double dragon 90# matrix asphalt, 15g of erythritol, 25g of aromatic oil and 2g of sulfur stabilizer;
s2, heating the 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
S3, adding aromatic oil, and stirring and developing for 1.0h;
s4, adding a sulfur stabilizer, and stirring and developing for 3 hours at 175+/-5 ℃;
s5, adding erythritol, and stirring and developing for 1.5 hours at 175+/-5 ℃ to obtain the modified asphalt.
Comparative example 3
The specific preparation steps of the modified asphalt provided by the embodiment comprise:
S1, weighing 55g of linear SBS modifier, 908g of double dragon 90# matrix asphalt, 5g of polyethylene wax, 5g of nano titanium dioxide, 25g of aromatic oil and 2g of sulfur stabilizer;
S2, heating the 70# matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding an SBS modifier, polyethylene wax and nano titanium dioxide, shearing for 0.5h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
S3, adding aromatic oil, and stirring and developing for 1.0h;
s4, adding a sulfur stabilizer, and stirring and developing for 4.5 hours at 175+/-5 ℃ to obtain the modified asphalt.
The test results of the above examples and comparative examples are shown in table 1 below.
Table 1 comparative example performance test results for each example
Compared with the examples 1-4, the hydrophobic weather-resistant main agent, the hydrophobic weather-resistant auxiliary agent A and the hydrophobic weather-resistant auxiliary agent B are removed from the components, the hydrophobic weather-resistant agent is the main component for resisting aging and reducing the sliding angle of the material, the sliding angle is an index for representing the infiltration characteristic of the material, and under the condition of not changing other conditions, the smaller the value is, the more water drops easily roll off. As can be seen from the data in the table, after the asphalt removes the hydrophobic weather-proof agent, the sliding angle between the asphalt surface and water is increased from 33 degrees to 68 degrees, and the large increase occurs, which indicates that the water drops are not easy to slide on the asphalt surface and cannot flow effectively; the penetration ratio of the asphalt is reduced to about 13%, which indicates that the ageing resistance of the asphalt is reduced; the dynamic viscosity value of asphalt at 60 ℃ is reduced to a certain extent, the adhesive property of the material is reduced by about 39%, the amplitude reduction is larger, and the adhesive property of the asphalt is greatly improved after the hydrophobic weather-proof agent is added.
Compared with the examples 1-4, the comparative example 2 has the components of reduced hydrophobic weather-proof main agent and hydrophobic weather-proof auxiliary agent A, and the penetration ratio of asphalt is reduced by about 10%, which indicates that the ageing resistance of asphalt is attenuated; the sliding angle of asphalt rises to 52 degrees, which indicates that the hydrophobic weather-proof main agent and the hydrophobic weather-proof auxiliary agent A can reduce the sliding angle of water and asphalt surface.
Compared with examples 1-4, the comparative example 3 has reduced hydrophobic weather-resistant auxiliary agent B in the components, and can be seen that the hydrophobic weather-resistant auxiliary agent B can effectively cooperate with the hydrophobic weather-resistant main agent and the hydrophobic weather-resistant auxiliary agent A in asphalt to form a hydrophobic weather-resistant coating together, the lack of the hydrophobic weather-resistant auxiliary agent B can only improve the ageing resistance of the surface of the asphalt, but can not effectively form the weather-resistant coating, the penetration ratio of the asphalt is improved compared with that of comparative example 2, the sliding angle is reduced by a larger extent than that of comparative example 2, and the addition of the hydrophobic weather-resistant auxiliary agent B into the asphalt can effectively prove that the ageing resistance and certain hydrophobic characteristics of the asphalt can be improved, but the improvement range is limited.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The hydrophobic durable high-viscosity modified asphalt is characterized by comprising the following components in parts by weight:
85-90 parts of matrix asphalt
4.0 To 6.5 portions of macromolecular modifier
0.1 To 1.0 part of hydrophobic weather-proof main agent
0.4 To 2.0 parts of hydrophobic weather-resistant auxiliary agent A
0.8 To 1.5 portions of hydrophobic weather-resistant auxiliary agent B
1.0 To 5.0 parts of organic viscosity reducer
0.1 To 1.0 part of stabilizer
The hydrophobic weather-proof main agent is any one or more of graphite-like carbon nitride, nano titanium dioxide and silicon dioxide nano particles;
The hydrophobic weather-resistant auxiliary agent A is any one or more of PE wax, fischer-Tropsch wax, oxidized polyethylene wax, palm wax and paraffin wax;
The hydrophobic weather-resistant auxiliary agent B is any one or more of threitol, xylitol, sorbitol, arabitol, ribitol and erythritol.
2. The hydrophobic durable high viscosity modified asphalt according to claim 1, wherein the base asphalt is any one or more of 70# straight run asphalt and 90# straight run base asphalt.
3. The hydrophobic durable high-viscosity modified asphalt according to claim 1, wherein the polymer modifier is any one or more of styrene-butadiene rubber, styrene-butadiene-styrene block copolymer, hydrogenated styrene-butadiene block copolymer, styrene-isoprene-styrene.
4. The hydrophobic durable high viscosity modified asphalt of claim 1, wherein the organic viscosity reducer is aromatic oil.
5. The hydrophobic durable high viscosity modified asphalt according to claim 1, wherein the stabilizer is sulfur.
6. A method for preparing the hydrophobic durable high-viscosity modified asphalt according to any one of claims 1 to 5, comprising the steps of:
S1, heating matrix asphalt to a flowing state at 170+/-2 ℃, stirring and preheating for 0.5h, adding a high molecular modifier, a hydrophobic weather-resistant main agent and a hydrophobic weather-resistant auxiliary agent A, shearing for 0.5-1.0 h at 175+/-2 ℃ by using a shearing machine, and stirring and developing for 2h at 175+/-5 ℃;
s2, adding an organic viscosity reducer, and stirring and developing for 0.5-1.0h;
S3, adding a stabilizer, and stirring and developing for 3-5 hours at 175+/-5 ℃; s4, adding the hydrophobic weather-resistant auxiliary agent B, and stirring and developing for 1-3 hours at 175+/-5 ℃ to obtain the hydrophobic durable high-viscosity modified asphalt.
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