High performance liquid asphalt and method for preparing the same

Abstract

The present application relates to the technical field of modified asphalt, in particular to a kind of high-performance liquid asphalt and preparation method thereof.The liquid asphalt of the present application is composed of base asphalt 100-110 parts, liquid asphalt 5-20 parts, modified SBS 5-10 parts, liquefied solvent 5-20 parts and stabilizer 0.1-2 parts;Wherein modified SBS is prepared by first carrying out aminylation treatment to SBS, and then reacting with tri (4-formylphenyl) amine and tri (4-aminophenyl) amine.The present application constructs rigid-flexible three-dimensional crosslinking network, so that the material has excellent high-temperature stability and low-temperature toughness, and also has self-repairing ability and good aging resistance, and the product has excellent construction performance, and is suitable for road construction in extreme climate areas and heavy-load traffic sections.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of modified asphalt, in particular to a high-performance liquid asphalt and a preparation method thereof. BACKGROUND

[0002] In recent years, with the rapid development of China's transportation infrastructure, the performance requirements of road asphalt materials are increasing. The traditional SBS modified asphalt has three key technical defects in practical application: first, in high temperature environment, the softening point of modified asphalt is insufficient, which leads to rutting deformation of the road surface; second, in low temperature conditions, the material flexibility is insufficient, which causes the road surface to crack; third, long-term exposure to ultraviolet and oxidative environment, the modified asphalt is prone to aging and embrittlement. These performance defects seriously restrict the application of modified asphalt in extreme climate areas and heavy traffic road sections.

[0003] Patent technology document CN108517128B discloses a kind of liquid SBS modified asphalt and its preparation method, which is a representative physical blending method modification technology. The invention is prepared in an organic environment, the solvent can be recycled, the swelling speed is increased, the reaction energy consumption is reduced, the product quality is guaranteed, the process is simple, the equipment cost is low, and the problems of poor compatibility of SBS and base asphalt and water content in liquid asphalt are solved.

[0004] However, since asphalt materials are often used in road paving, frequent replacement will not only affect traffic but also cause economic and environmental damage, so the comprehensive performance of asphalt materials is more severely required. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a high-performance liquid asphalt and a preparation method thereof, to provide a high-performance liquid asphalt material with good high-temperature stability, low-temperature toughness, and aging resistance, and certain self-repairing ability.

[0006] To achieve the above purpose, the present application provides a high-performance liquid asphalt, which is prepared from the following raw materials by weight: 100-110 parts of base asphalt, 5-20 parts of liquid asphalt, 5-10 parts of modified SBS, 5-20 parts of liquid solvent, and 0.1-2 parts of stabilizer.

[0007] Preferably, the modified SBS is first aminated to obtain aminated SBS, and then mixed and reacted with tris(4-formylphenyl)amine and tris(4-aminophenyl)amine to obtain.

[0008] Preferably, the S / B front section ratio of the SBS is 30-40 / 70-60, and the melt viscosity is 0.4-2 g / min.

[0009] Preferably, the amine-based SBS is obtained by free radical polymerization of SBS and acrylamide under the action of initiator 2,2-azobis(isobutyronitrile).

[0010] Preferably, the weight ratio of the SBS, acrylamide, 2,2-azobis(isobutyronitrile) is 5-10 g:1-2 g:0.15-0.3 g.

[0011] Preferably, the weight ratio of the amine-based SBS, tris(4-formylphenyl)amine, tris(4-aminophenyl)amine is 5-10 g:0.35-0.7 g:0.25-0.5 g.

[0012] Preferably, the base asphalt is one of 70# road asphalt and 90# road asphalt after removing moisture.

[0013] Preferably, the liquid asphalt is obtained by mixing base asphalt and oily solvent at a weight ratio of 1:1.

[0014] Preferably, the oily solvent is one of diesel, kerosene, gasoline and engine oil.

[0015] Preferably, the liquefied solvent is one of toluene, cyclohexane and acetone.

[0016] Preferably, the stabilizer is one of dicumyl peroxide, sulfur powder and di-tert-butyl peroxide.

[0017] Further, the application also provides a preparation method of high-performance liquid asphalt, and the specific steps are as follows:

[0018] (1) 1.5-7.5 parts of modified SBS are mixed with 5-25 parts of liquefied solvent at room temperature, and then added into 5-20 parts of liquid asphalt after the SBS is fully dissolved, and the temperature is increased to 60-110 DEG C, and then stirred uniformly, and then the liquefied solvent is distilled and recovered, and then a liquid modified SBS asphalt mixture is obtained;

[0019] (2) 100-110 parts of base asphalt are heated to 120-140 DEG C, the liquid modified SBS asphalt mixture is slowly added into the hot base asphalt, and then stirred and heated to 140-170 DEG C, and then 0.1-2 parts of stabilizer is added, and then developed for 1-2 hours, and then continuously stirred during the heating process, and then a high-performance liquid asphalt is obtained.

[0020] The application has the following beneficial effects:

[0021] The application constructs a dynamic covalent crosslinking network structure by adding tri(4-formylphenyl)amine and 0.4g tri(4-aminophenyl)amine in modified SBS, and the rigid structure unit in the crosslinking network effectively inhibits the molecular chain slip under high temperature conditions, and significantly improves the high temperature deformation resistance of the asphalt material; meanwhile, the flexible chain segment in the network endows the material with good low temperature deformation ability, avoiding the risk of pavement cracking in cold environment. The rigid and flexible molecular design realizes the synergistic optimization of high temperature performance and low temperature performance, breaking through the limitation of traditional modification technology that cannot simultaneously consider both.

[0022] The application constructs a dynamic covalent crosslinking network structure by adding tri(4-formylphenyl)amine and 0.4g tri(4-aminophenyl)amine in modified SBS, so that the material can reversibly break and recombine when stressed, so that the material has energy dissipation and self-repairing potential.

[0023] The high-performance liquid asphalt has good construction adaptability, and the suitable penetration range ensures that the material has ideal fluidity and pumpability at conventional construction temperature, facilitating paving and compaction. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the application clearer and more apparent, the application will be further described in detail below with specific examples.

[0025] Example 1: A high-performance liquid asphalt, the specific preparation steps are as follows:

[0026] (1) Under a nitrogen atmosphere, 5g SBS was dissolved in 90g methoxylcyclopentane, and after ultrasonic homogenization, 0.15g 2,2-azobis(isobutyronitrile) was added, then 1g acrylamide was added, and the reaction was kept at 65℃ in an oil bath for 12h. After the reaction was completed, the obtained product was precipitated in anhydrous methanol, and the precipitate was redissolved in methoxylcyclopentane, and the purification was repeated three times to obtain an aminylated SBS;

[0027] (2) 5g aminylated SBS and 0.35g tri(4-formylphenyl)amine and 0.25g tri(4-aminophenyl)amine were mixed, and then the reaction system was placed in an oil bath at 90℃ for 2h. After the reaction was completed, the product was placed in a vacuum dryer at 90℃ until the weight was constant to obtain modified SBS;

[0028] (3) 1.5g modified SBS was mixed with 5g toluene at room temperature, and after the SBS was fully dissolved, it was added to 5g liquid asphalt (70# road asphalt: diesel oil = 1:1), the temperature was raised to 60℃, and the mixture was stirred uniformly. After the toluene was distilled and recovered, a liquid modified SBS asphalt mixture was obtained;

[0029] (4) Take 100 g of 70# road asphalt and heat it to 120°C, slowly add the liquid modified SBS asphalt mixture to the hot base asphalt, stir and heat to 140°C, add 0.1 g of sulfur powder, develop for 1 h, continuously stir during heating, and a high-performance liquid asphalt is obtained.

[0030] Example 2: A high-performance liquid asphalt, the specific preparation steps are as follows:

[0031] (1) Under a nitrogen atmosphere, 7.5 g of SBS is dissolved in 95 g of methoxylcyclopentane, after ultrasonic homogenization, 0.25 g of 2,2-azobis(isobutyronitrile) is added, then 1.5 g of acrylamide is added, and it is kept in an oil bath at 65°C for 13 h. After the reaction is completed, the resulting product is precipitated in anhydrous methanol, and the precipitate is redissolved in methoxylcyclopentane, and purification is repeated three times to obtain an amine-modified SBS;

[0032] (2) Mix 7.5 g of the amine-modified SBS with 0.5 g of tris(4-formylphenyl)amine and 0.4 g of tris(4-aminophenyl)amine, then place the reaction system in an oil bath at 93°C for 2 h. After the reaction is completed, the product is dried under vacuum at 90°C to constant weight to obtain a modified SBS;

[0033] (3) Mix 4.5 g of the modified SBS with 15 g of toluene at room temperature, and after the SBS is fully dissolved, add it to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1), heat to 90°C, stir until uniform, and after the toluene is completely distilled and recovered, a liquid modified SBS asphalt mixture is obtained;

[0034] (4) Take 105 g of 70# road asphalt and heat it to 130°C, slowly add the liquid modified SBS asphalt mixture to the hot base asphalt, stir and heat to 160°C, add 1 g of sulfur powder, develop for 2 h, continuously stir during heating, and a high-performance liquid asphalt is obtained.

[0035] Example 3: A high-performance liquid asphalt, the specific preparation steps are as follows:

[0036] (1) Under a nitrogen atmosphere, 10 g of SBS is dissolved in 100 g of methoxylcyclopentane, after ultrasonic homogenization, 0.3 g of 2,2-azobis(isobutyronitrile) is added, then 2 g of acrylamide is added, and it is kept in an oil bath at 70°C for 14 h. After the reaction is completed, the resulting product is precipitated in anhydrous methanol, and the precipitate is redissolved in methoxylcyclopentane, and purification is repeated three times to obtain an amine-modified SBS;

[0037] (2) 10 g of the aminated SBS and 0.7 g of tris(4-formylphenyl)amine and 0.5 g of tris(4-aminophenyl)amine were mixed, and then the reaction system was placed in an oil bath at 95°C for 3 h. After the reaction was completed, the product was vacuum dried at 90°C to a constant weight to obtain the modified SBS;

[0038] (3) 7.5 g of the modified SBS was mixed with 25 g of toluene at room temperature, and after the SBS was fully dissolved, it was added to 20 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 110°C, and after uniform stirring, the toluene was distilled and recovered to obtain a liquid modified SBS asphalt mixture;

[0039] (4) 110 g of 70# road asphalt was heated to 140°C, and the liquid modified SBS asphalt mixture was slowly added to the hot base asphalt. After stirring and heating to 170°C, 2 g of sulfur powder was added, and developed for 2 h. During the heating process, constant stirring was performed to obtain high-performance liquid asphalt.

[0040] Comparative Example 1: The difference from Example 2 is that tris(4-formylphenyl)amine is not added, and the specific steps remain unchanged, and the specific steps are as follows:

[0041] (1) Under a nitrogen atmosphere, 7.5 g of SBS was dissolved in 95 g of methoxycyclopentane, and after ultrasonic uniformity, 0.25 g of 2,2-azobis(isobutyronitrile) was added, followed by the addition of 1.5 g of acrylamide. The reaction was maintained at 65°C in an oil bath for 13 h. After the reaction was completed, the product was precipitated in anhydrous methanol and redissolved in methoxycyclopentane. Purification was repeated three times to obtain aminated SBS;

[0042] (2) 7.5 g of the aminated SBS and 0.4 g of tris(4-aminophenyl)amine were mixed, and then the reaction system was placed in an oil bath at 93°C for 2 h. After the reaction was completed, the product was vacuum dried at 90°C to a constant weight to obtain the modified SBS;

[0043] (3) 4.5 g of the modified SBS was mixed with 15 g of toluene at room temperature, and after the SBS was fully dissolved, it was added to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 90°C, and after uniform stirring, the toluene was distilled and recovered to obtain a liquid modified SBS asphalt mixture;

[0044] (4) 105 g of 70# road asphalt was heated to 130°C, and the liquid modified SBS asphalt mixture was slowly added to the hot base asphalt. After stirring and heating to 160°C, 1 g of sulfur powder was added, and developed for 2 h. During the heating process, constant stirring was performed to obtain high-performance liquid asphalt.

[0045] Comparative Example 2: The difference from Example 2 is that no tris(4-aminophenyl)amine is added, and the specific steps remain unchanged, and the specific steps are as follows:

[0046] (1) Under a nitrogen atmosphere, 7.5 g of SBS was dissolved in 95 g of methoxycyclopentane, and after ultrasonic homogenization, 0.25 g of 2,2-azobis(isobutyronitrile) was added, followed by the addition of 1.5 g of acrylamide, and the reaction was maintained at 65°C in an oil bath for 13 h. After the reaction was completed, the resulting product was precipitated in anhydrous methanol, and the precipitate was redissolved in methoxycyclopentane, and purification was repeated three times to obtain an aminated SBS;

[0047] (2) 7.5 g of aminated SBS and 0.5 g of tris(4-formylphenyl)amine were mixed, and then the reaction system was placed in an oil bath at 93°C for 2 h. After the reaction was completed, the product was placed in a vacuum oven at 90°C until the weight was constant to obtain a modified SBS;

[0048] (3) 4.5 g of modified SBS was mixed with 15 g of toluene at room temperature, and after the SBS was fully dissolved, it was added to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 90°C, and the mixture was stirred uniformly. After the toluene was completely distilled and recovered, a liquid modified SBS asphalt mixture was obtained;

[0049] (4) 105 g of 70# road asphalt was heated to 130°C, and the liquid modified SBS asphalt mixture was slowly added to the hot base asphalt. The temperature was raised to 160°C, and 1 g of sulfur powder was added. The development was carried out for 2 h, and the mixture was continuously stirred during the heating process to obtain a high-performance liquid asphalt.

[0050] Comparative Example 3: The difference from Example 2 is that tris(4-formylphenyl)amine is replaced by 4-diphenylaminobenzaldehyde, and the specific steps remain unchanged, and the specific steps are as follows:

[0051] (1) Under a nitrogen atmosphere, 7.5 g of SBS was dissolved in 95 g of methoxycyclopentane, and after ultrasonic homogenization, 0.25 g of 2,2-azobis(isobutyronitrile) was added, followed by the addition of 1.5 g of acrylamide, and the reaction was maintained at 65°C in an oil bath for 13 h. After the reaction was completed, the resulting product was precipitated in anhydrous methanol, and the precipitate was redissolved in methoxycyclopentane, and purification was repeated three times to obtain an aminated SBS;

[0052] (2) 7.5 g of aminated SBS and 0.5 g of 4-diphenylaminobenzaldehyde and 0.4 g of tris(4-aminophenyl)amine were mixed, and then the reaction system was placed in an oil bath at 93°C for 2 h. After the reaction was completed, the product was placed in a vacuum oven at 90°C until the weight was constant to obtain a modified SBS;

[0053] (3) 4.5 g of the modified SBS was mixed with 15 g of toluene at room temperature, and after the SBS was fully dissolved, it was added to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 90°C, and after uniform stirring, the toluene was distilled and recovered, to obtain a liquid modified SBS asphalt mixture;

[0054] (4) 105 g of 70# road asphalt was heated to 130°C, and the liquid modified SBS asphalt mixture was slowly added to the hot base asphalt. After stirring and raising the temperature to 160°C, 1 g of sulfur powder was added, and development was carried out for 2 h. During the heating process, constant stirring was carried out, to obtain high-performance liquid asphalt.

[0055] Comparative Example 4: The difference from Example 2 is that tris(4-aminophenyl)amine is replaced by 4-aminotriphenylamine, and the specific steps remain unchanged, and the specific steps are as follows:

[0056] (1) Under a nitrogen atmosphere, 7.5 g of SBS was dissolved in 95 g of methoxylcyclopentane, and after uniform ultrasonic treatment, 0.25 g of 2,2-azobis(isobutyronitrile) was added, followed by 1.5 g of acrylamide. The reaction was maintained at 65°C in an oil bath for 13 h. After the reaction was completed, the product was precipitated in anhydrous methanol, and the precipitate was redissolved in methoxylcyclopentane. Purification was repeated three times to obtain aminated SBS;

[0057] (2) 7.5 g of aminated SBS, 0.5 g of tris(4-formylphenyl)amine, and 0.4 g of 4-aminotriphenylamine were mixed, and then the reaction system was placed in an oil bath at 93°C for 2 h. After the reaction was completed, the product was vacuum dried at 90°C to constant weight to obtain modified SBS;

[0058] (3) 4.5 g of the modified SBS was mixed with 15 g of toluene at room temperature, and after the SBS was fully dissolved, it was added to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 90°C, and after uniform stirring, the toluene was distilled and recovered, to obtain a liquid modified SBS asphalt mixture;

[0059] (4) 105 g of 70# road asphalt was heated to 130°C, and the liquid modified SBS asphalt mixture was slowly added to the hot base asphalt. After stirring and raising the temperature to 160°C, 1 g of sulfur powder was added, and development was carried out for 2 h. During the heating process, constant stirring was carried out, to obtain high-performance liquid asphalt.

[0060] Comparative Example 5: The difference from Example 2 is that SBS is not modified, and liquid asphalt is prepared by directly mixing raw materials, and the specific steps are as follows:

[0061] (1) 4.5 g SBS was mixed with 15 g toluene at room temperature, and after the SBS was fully dissolved, it was added to 15 g of liquid asphalt (70# road asphalt: diesel oil = 1:1). The temperature was raised to 90°C, and stirred uniformly. After the toluene was distilled and recovered, a liquid SBS asphalt mixture was obtained;

[0062] (2) 105 g of 70# road asphalt was heated to 130°C, and the liquid SBS asphalt mixture was slowly added to the hot base asphalt. The temperature was raised to 160°C, 1 g of sulfur powder was added, and developed for 2 h. During the heating process, constant stirring was carried out, and a high-performance liquid asphalt was obtained.

[0063] Performance test

[0064] According to the "Highway Engineering Asphalt and Asphalt Mixture Test Procedure" JTGE20-2011, the ductility, penetration, softening point of the liquid asphalt were tested; elastic recovery rate test: the obtained sample was stretched to 10 cm at 25°C, and after being fixed for 30 min, the residual deformation was measured; aging performance: the obtained sample was placed in a rotary film oven at 163°C for 5 h, and the elastic recovery rate was measured. The test results are shown in Table 1.

[0065] Table 1 Performance test results

[0066]

[0067]

[0068] Data analysis: From the data of Examples 1-3 in Table 1, it can be seen that the high-performance liquid asphalt prepared by the present application exhibits excellent comprehensive performance balance. The penetration is maintained in the ideal range, indicating that the material has moderate hardness and construction workability; the softening point is as high as 82-87°C, showing excellent high-temperature stability. The most outstanding is the elastic recovery rate data, and after aging, it can still retain 80%-85% of the performance. This excellent elastic retention ability implies the reversible nature of the dynamic imine bond, thereby endowing the material with certain self-repairing potential. This combination of rigidity and flexibility in molecular design enables the asphalt to maintain stable performance in a wide temperature range, both resisting high-temperature deformation and maintaining low-temperature toughness, achieving the performance synergistic optimization that traditional modified asphalt cannot achieve.

[0069] From the data comparison of Example 2 and Comparative Examples 1, 3 in Table 1, it can be observed that the introduction of tris(4-formylphenyl)amine significantly improves the key performance indicators of the material. Example 2 exhibits a higher softening point and superior elastic recovery performance. This performance improvement may be due to the dynamic covalent crosslinking network structure formed between tris(4-formylphenyl)amine and amine-based SBS. This crosslinking network remains stable at high temperatures, thereby imparting the material with superior high-temperature deformation resistance. Meanwhile, the reversible breaking and recombination characteristics of the dynamic covalent bond may be the underlying mechanism for the improvement in elastic recovery performance. Furthermore, compared to linear or branched structures constructed from mono-aldehyde compounds, the three-functional crosslinking agent involved in the construction of the network exhibits advantages in terms of high-temperature stability, elastic recovery performance, and aging resistance. This reflects the stronger resistance of the network structure formed by the three-functional crosslinking to thermal and oxidative degradation, which may be related to the uniformity of crosslinking point distribution and bond energy stability.

[0070] From the data comparison of Example 2 and Comparative Examples 2, 4 in Table 1, it can be seen that the introduction of tris(4-aminophenyl)amine has a significant impact on the material performance. The addition of tris(4-aminophenyl)amine allows the material to maintain appropriate penetration while achieving a higher softening point and superior elastic recovery performance. This performance improvement may be due to the synergistic crosslinking network structure formed between the amine groups in tris(4-aminophenyl)amine molecules and amine-based SBS and tris(4-formylphenyl)amine. This crosslinking network constructs a more uniform spatial distribution at the molecular level, enabling more effective stress transfer and energy dissipation when the material is under stress. Meanwhile, the improvement in performance retention rate after aging indicates that the crosslinking structure constructed by tris(4-aminophenyl)amine has better thermal stability, effectively resisting molecular chain rupture caused by thermal and oxidative aging. This stability may be due to the rigid characteristics of the benzene ring structure in tris(4-aminophenyl)amine molecules and its synergistic effect with the crosslinking network. Furthermore, when tris(4-aminophenyl)amine is used as a crosslinking component, the material performance exhibits systematic improvement compared to 4-aminotriphenylamine. This performance difference may be due to the three-dimensional crosslinking network structure formed by the three amine groups in tris(4-aminophenyl)amine molecules and tris(4-formylphenyl)amine, which has a more perfect spatial continuity compared to linear or branched structures constructed from mono-amine compounds.

[0071] From the data comparison of Example 2 and Comparative Example 5 in Table 1, it can be seen that the amine modification of SBS significantly improves the material performance. This performance improvement may be due to the crosslinking network structure formed between amine-based SBS and tris(4-formylphenyl)amine, tris(4-aminophenyl)amine.

[0072] Those skilled in the art should understand that the above discussion of any embodiment is only intended to be exemplary in nature and is not intended to suggest that the present application is limited to these examples; under the concept of the present application, the above embodiments or technical features among different embodiments can be combined, steps can be implemented in any order, and there are many other variations of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

Claims

1. A high performance liquid bitumen characterised in that, The high performance liquid asphalt is prepared from the following raw materials in parts by weight: base asphalt 100-110 parts, liquid asphalt 5-20 parts, modified SBS 5-10 parts, liquefied solvent 5-20 parts, stabilizer 0.1-2 parts; The modified SBS is obtained by mixing and reacting amine-modified SBS, tris(4-formylphenyl)amine and tris(4-aminophenyl)amine; The amine-modified SBS is obtained by free radical polymerization of SBS and acrylamide under the action of initiator 2,2-azobis(isobutyronitrile); the weight ratio of the SBS, acrylamide and 2,2-azobis(isobutyronitrile) is 5-10 g:1-2 g:0.15-0.3 g; The weight ratio of the amine-modified SBS, tris(4-formylphenyl)amine and tris(4-aminophenyl)amine is 5-10 g:0.35-0.7 g:0.25-0.5 g; The S / B block ratio of the SBS is 30-40 / 70-60, and the melt viscosity is 0.4-2 g / min.

2. The high performance liquid pitch according to claim 1, characterized in that, The base asphalt is one of 70# road asphalt and 90# road asphalt after removing moisture.

3. The high performance liquid asphalt of claim 1, wherein, The liquid asphalt is obtained by mixing base asphalt and oily solvent in a weight ratio of 1:

1.

4. The high performance liquid pitch according to claim 3, wherein, The oily solvent is one of diesel, kerosene, gasoline and engine oil.

5. The high performance liquid asphalt of claim 1, wherein, The liquefied solvent is one of toluene, cyclohexane and acetone.

6. The high performance liquid asphalt of claim 1, wherein, The stabilizer is one of dicumyl peroxide, sulfur powder and di-tert-butyl peroxide.

7. A process for the preparation of a high performance liquid pitch according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: The modified SBS is mixed with the liquefied solvent at room temperature, and after the SBS is fully dissolved, it is added to the liquid asphalt, the temperature is raised to 60-110℃, and the mixture is stirred uniformly to obtain a liquid modified SBS asphalt mixture; the base asphalt is heated to 120-140℃, the liquid modified SBS asphalt mixture is slowly added to the hot base asphalt, and the temperature is raised to 140-170℃ while stirring, the stabilizer is added, and the mixture is developed for 1-2 h to obtain the high performance liquid asphalt.

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