An acrylated epoxy vegetable oil, its preparation method and use

Abstract

The application discloses an acrylated epoxy vegetable oil and a preparation method and application thereof, and the preparation steps are as follows: 100 parts of epoxy vegetable oil and 1-2 parts of a catalyst are mixed at 20-30 DEG C, stirred and heated to 60-90 DEG C, 6-9 parts of an acrylation agent and 0.3-1 part of a polymerization inhibitor are added, the temperature is increased to 100-130 DEG C after dropwise addition is completed, constant temperature reaction is carried out at a rotation speed of 500-800 r / min for 6-8 h, and the residual acrylation agent is removed under reduced pressure, so that the acrylated epoxy vegetable oil is obtained. The application can improve the low-temperature and fatigue resistance of asphalt, reduce the temperature of asphalt mixture mixing and compaction, save energy consumption and reduce carbon dioxide emission.

Description

An acrylic epoxy vegetable oil, its preparation method and application Technical Field

[0001] This invention belongs to the field of asphalt material technology, specifically relating to an acrylic epoxy vegetable oil, its preparation method, and its application. Background Technology

[0002] my country's highways utilize traditional hot-mix asphalt (HMA) pavement technology. However, HMA presents environmental problems such as high energy consumption and high pollution. The mixing temperature during HMA production often reaches 150–180℃ and is maintained for extended periods. The mixing, paving, and compaction processes consume significant amounts of fossil fuels. Furthermore, the construction process generates large quantities of carbon dioxide, toxic gases, and dust, seriously threatening the health of on-site workers and the surrounding atmospheric environment.

[0003] To lower the mixing and compaction temperature of asphalt mixtures, warm mix agents need to be added. Traditional warm mix agent preparation techniques use non-renewable resources such as rubber oil and wax, which have poor environmental performance, are expensive, have high production costs, and are not biodegradable. To address these shortcomings, scientists are focusing on using bio-based materials to prepare bio-based warm mix agents.

[0004] Vegetable oils and their derivatives have attracted researchers' attention due to their abundant resources and environmental benefits. As a bio-based material, vegetable oils exhibit compatibility with asphalt. Current research has demonstrated that bio-based materials such as vegetable oils, wood fibers, agricultural residues, and animal manure, when used as asphalt modifiers, can effectively improve the low-temperature performance and fatigue resistance of petroleum asphalt. Therefore, further modification of vegetable oils to achieve better warm-mix effects and reduce the mixing and compaction temperatures of asphalt mixtures has become a popular research direction. Summary of the Invention

[0005] Technical problem solved: To address the above-mentioned technical problems, this invention provides an acrylic epoxy vegetable oil, its preparation method, and its application, which can improve the low-temperature and fatigue resistance of asphalt, reduce the mixing and compaction temperature of asphalt mixtures, save energy, and reduce carbon dioxide emissions.

[0006] Technical solution: A method for preparing acrylic epoxy vegetable oil, comprising the following steps: 100 parts by weight of epoxy vegetable oil and 1-2 parts by weight of catalyst are mixed at 20-30°C, stirred and heated to 60-90°C, 6-9 parts by weight of acrylicing agent and 0.3-1 parts by weight of polymerization inhibitor are added, and after the addition is complete, the temperature is raised to 100-130°C, and the reaction is carried out at a constant temperature of 500-800 r / min for 6-8 h. The remaining acrylicing agent is removed under reduced pressure to obtain acrylic epoxy vegetable oil.

[0007] Preferably, the epoxy value of the epoxidized vegetable oil is ≥6.0%.

[0008] Preferably, the epoxidized vegetable oil is one or more of epoxidized soybean oil, epoxidized rapeseed oil, epoxidized peanut oil, and epoxidized sunflower seed oil.

[0009] Preferably, the catalyst is one or more of triphenylphosphine, hydroquinone, triethylamine, and dimethylacetamide.

[0010] Preferably, the polymerization inhibitor is one or more of butylated hydroxytoluene, 4-tert-butylcatechol, and p-hydroxyanisole.

[0011] Preferably, the acrylate agent is one or more of acrylic acid, methacrylic acid, 2-propylacrylic acid and methylbutenoic acid.

[0012] Acrylated epoxy vegetable oil prepared by the above method.

[0013] The application of the acrylic epoxy vegetable oil in asphalt is carried out in the following steps: the acrylic epoxy vegetable oil is added to the base asphalt at a dosage of 3-16 wt.%, sheared at a shearing speed of 3000 r / min for 30-60 min, and after cooling, acrylic epoxy vegetable oil modified asphalt can be obtained.

[0014] Beneficial effects: This invention solves the problems of environmental pollution and high price caused by the production of traditional petroleum-based asphalt warm mix agents, rejuvenators and modifiers. The acrylic epoxy vegetable oil provided can improve the warm mix effect and low temperature and fatigue resistance of asphalt.

[0015] Specifically:

[0016] The acrylic epoxy vegetable oil modified bitumen provided by this invention has better low-temperature performance and fatigue resistance than SBS modified bitumen, with performance improvement of more than 15% and cost reduction of more than 10%.

[0017] This invention uses renewable bio-based materials. Compared with traditional petroleum-based modifiers, the raw material production is more environmentally friendly, significantly reducing CO2 emissions. In the preparation process of acrylic epoxy vegetable oil modified asphalt, because the modifier is liquid, the shearing time, temperature and speed of the high-speed shearing machine can be set to smaller parameters, resulting in less heat energy consumption. Using acrylic epoxy vegetable oil modified asphalt can reduce total energy consumption by more than 40% and CO2 emissions by more than 34%.

[0018] Acrylated epoxy vegetable oil can reduce the temperature of the mixture during mixing and compaction by about 30°C. When used in engineering projects, it can reduce total energy consumption by more than 30% and reduce CO2 emissions by more than 25%. Attached Figure Description

[0019] Figure 1 is a flowchart of the preparation process of the present invention;

[0020] Figure 2 is a reaction mechanism diagram of the present invention;

[0021] Figure 3 shows the infrared spectra of epoxidized soybean oil (ESO) and acrylic epoxidized soybean oil (AESO) prepared in Example 1 of this invention. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] The performance testing methods for modified asphalt mixtures and the preparation and performance testing methods for acrylic epoxy vegetable oil modified asphalt and its mixtures in this invention are all based on the "Technical Specifications for Highway Asphalt Pavement Recycling" (Industry Standard of the People's Republic of China, JTG / T 5521—2019) and the "Technical Specifications for Highway Asphalt Pavement Construction" (Industry Standard of the People's Republic of China, JTG F40-2004).

[0024] Coarse aggregate (particle size ≥ 2.36 mm) is basalt crushed stone, fine aggregate (particle size < 2.36 mm) is limestone crushed stone, and mineral powder is used as filler. All aggregate properties meet the requirements of JTGF40-2004 "Technical Specification for Construction of Highway Asphalt Pavement". The asphalt-aggregate ratio is 5.0%, and the gradation is AC-13. The gradation of the mixture materials in the following examples is shown in Table 1.

[0025] Table 1 shows the gradation of the asphalt mixtures used in Examples 1-7.

[0026]

[0027] Note: The gradation used in the examples means that the mixture gradation in Examples 1-7 all adopts this gradation. If other gradations are actually used, the amount of other materials added to the corresponding mixture can be calculated according to the specifications.

[0028] Example 1

[0029] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0030]

[0031] Preparation of acrylic epoxy vegetable oil:

[0032] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 20°C, stirred and heated to 60°C, and acrylic acid (AA) and the polymerization inhibitor p-hydroxyanisole (MEHQ) were added dropwise. After the addition was completed, the temperature was raised to 110°C, and the reaction was carried out for 7 hours under the condition of stirring at a speed of 500 r / min. Finally, the remaining acrylic acidifying agent was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0033] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0034] 100 parts of high viscosity asphalt

[0035] 3 parts acrylic epoxidized soybean oil

[0036] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0037] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (3% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 8-24 rubber oil (2% by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30th the weight of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0038] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 3%, and sheared for 45 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0039] As shown in Figure 3, in the infrared spectrum of epoxidized soybean oil (ESO), at 840 cm⁻¹... -1 and 825cm -1 The presence of absorption peaks representing stretching and skeletal vibrations of epoxy groups indicates the presence of epoxy groups. However, in the infrared spectrum of acrylic acid epoxidized soybean oil (AESO), the characteristic peaks of the cyclic groups essentially disappear, and the peaks at 3512 cm⁻¹ are absent. -1 A broad and diffuse absorption peak clearly representing the stretching vibration of -OH appeared at 1636 cm⁻¹, and at 1636 cm⁻¹... -1 A new stretching vibration peak of the C=C double bond in acrylic acid and an out-of-plane bending vibration peak of the carbon bond on the -C=CH double bond appeared. This indicates that acrylic acid underwent a ring-opening reaction with the epoxy group to generate a hydroxyl group.

[0040] Table 2. Basic parameters of the acrylic epoxy vegetable oil prepared in Example 1

[0041]

[0042] Table 3. Main performance parameters of the acrylic epoxy vegetable oil modified high-viscosity asphalt prepared in Example 1

[0043]

[0044]

[0045] Table 4 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 1

[0046] Test Item | Unit | Test Method | Drainage Asphalt Mixture | Example 1 | Technical Indicators | Rutting Test | Dynamic Stability (times / mm) | T 0.71957856784 | ≥3500 | Residual Stability (%) | T 0.70984.588.5 | ≥80 | Residual Strength Ratio of Freeze-Thaw Splitting Test (%) | T 0.72983.686.3 | ≥75 | Low Temperature Bending Test | Failure Strain (με) | T 0.71530214012 | ≥2800 | Marshall Test (60℃) Stability (kN) | T 0.7095.312.5 | ≥3.5 surface

[0047] Example 2

[0048] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0049]

[0050] Preparation of acrylic epoxy vegetable oil:

[0051] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 30°C, stirred and heated to 70°C, and acrylic acid (AA) and the polymerization inhibitor dibutylhydroxytoluene (BHT) were added dropwise. After the addition was completed, the temperature was raised to 120°C, and the reaction was carried out for 7 hours under the condition of stirring at a speed of 600 r / min. Finally, the remaining acrylic acidifying agent was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0052] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0053] 100 parts of high viscosity asphalt

[0054] 5 parts acrylic epoxy vegetable oil

[0055] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0056] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (5% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 2% by weight of 8-24 rubber oil (by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by weight of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0057] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 5%, and sheared for 50 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0058] Table 5. Basic parameters of the acrylic epoxy vegetable oil prepared in Example 2

[0059]

[0060] Table 6. Main performance parameters of the acrylic epoxy vegetable oil modified bitumen prepared in Example 2

[0061]

[0062] Table 7 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 2

[0063] Test Item | Unit | Test Method | Drainage Asphalt Mixture | Example 2 | Technical Indicators | Rutting Test | Dynamic Stability (times / mm) | T 0.71957856772 | ≥3500 | Residual Stability (%) | T 0.70984.587.6 | ≥80 | Residual Strength Ratio of Freeze-Thaw Splitting Test (%) | T 0.72983.685.9 | ≥75 | Low Temperature Bending Test | Failure Strain (με) | T 0.71530215162 | ≥2800 | Marshall Test (60℃) Stability (kN) | T 0.7095.313.8 | ≥3.5 surface

[0064] Example 3

[0065] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0066]

[0067] Preparation of acrylic epoxy vegetable oil:

[0068] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 30°C, stirred and heated to 85°C, and acrylic acid (AA) and polymerization inhibitor 4-tert-butylcatechol (TBC) were added dropwise. After the addition was complete, the temperature was raised to 120°C, and the reaction was carried out for 8 hours under a stirring rate of 700 r / min. Finally, the remaining acrylic paint was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0069] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0070] 100 parts of high viscosity asphalt

[0071] 5 parts acrylic epoxy vegetable oil

[0072] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0073] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (5% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 8-24 rubber oil (4% by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by mass of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0074] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 5%, and sheared for 50 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0075] Table 8. Basic parameters of the acrylic epoxy vegetable oil prepared in Example 3

[0076]

[0077] Table 9. Main performance parameters of the acrylic epoxy vegetable oil modified asphalt prepared in Example 3

[0078]

[0079] Table 10 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 3

[0080]

[0081]

[0082] Example 4

[0083] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0084]

[0085] Preparation of acrylic epoxy vegetable oil:

[0086] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 25°C, stirred and heated to 80°C, and acrylic acid (AA) and the polymerization inhibitor p-hydroxyanisole (MEHQ) were added dropwise. After the addition was completed, the temperature was raised to 120°C, and the reaction was carried out for 6 hours under the condition of stirring at a speed of 800 r / min. Finally, the remaining acrylic paint was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0087] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0088] 100 parts of high viscosity asphalt

[0089] 3 parts acrylic epoxy vegetable oil

[0090] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0091] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (3% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 8-24 rubber oil (5% by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by mass of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0092] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 3%, and sheared for 50 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0093] Table 11 Basic parameters of the acrylic epoxy vegetable oil prepared in Example 4

[0094]

[0095] Table 12 Main performance parameters of the acrylic epoxy vegetable oil modified bitumen prepared in Example 4

[0096]

[0097] Table 13 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 4

[0098]

[0099]

[0100] Example 5

[0101] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0102]

[0103] Preparation of acrylic epoxy vegetable oil:

[0104] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 30°C, stirred and heated to 75°C, and acrylic acid (AA) and the polymerization inhibitor dibutylhydroxytoluene (BHT) were added dropwise. After the addition was completed, the temperature was raised to 130°C, and the reaction was carried out for 7 hours under the condition of stirring at a speed of 600 r / min. Finally, the remaining acrylic acidifying agent was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0105] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0106] 100 parts of high viscosity asphalt

[0107] 8 parts acrylic epoxy vegetable oil

[0108] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0109] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (8% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 8-24 rubber oil (5% by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by weight of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0110] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 8%, and sheared for 60 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0111] Table 14 Basic parameters of the acrylic epoxy vegetable oil prepared in Example 5

[0112]

[0113]

[0114] Table 15 Main performance parameters of the acrylic epoxy vegetable oil modified bitumen prepared in Example 5

[0115]

[0116] Table 16 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 5

[0117]

[0118]

[0119] Example 6

[0120] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0121]

[0122] Preparation of acrylic epoxy vegetable oil:

[0123] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 25°C, stirred and heated to 70°C, and acrylic acid (AA) and the polymerization inhibitor p-hydroxyanisole (MEHQ) were added dropwise. After the addition was completed, the temperature was raised to 130°C, and the reaction was carried out for 8 hours at a stirring rate of 600 r / min. Finally, the remaining acrylic acidifying agent was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0124] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0125] 100 parts of high viscosity asphalt

[0126] 8 parts acrylic epoxy vegetable oil

[0127] Preparation of acrylic epoxy vegetable oil modified high-viscosity asphalt:

[0128] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (8% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 8-24 rubber oil (5% by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by weight of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0129] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 8%, and sheared for 50 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0130] Table 17 Basic parameters of the acrylic epoxy vegetable oil prepared in Example 6

[0131]

[0132]

[0133] Table 18 Main performance parameters of the acrylic epoxy vegetable oil modified bitumen prepared in Example 6

[0134]

[0135] Table 19 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 6

[0136] Test Item | Unit | Test Method | Drainage Asphalt Mixture | Example 6 | Technical Indicators | Rutting Test | Dynamic Stability (times / mm) | T 0.71952356489 | ≥3500 | Residual Stability (%) | T 0.70983.587.4 | ≥80 | Residual Strength Ratio of Freeze-Thaw Splitting Test (%) | T 0.72984.685.7 | ≥75 | Low Temperature Bending Test | Failure Strain (με) | T 0.71534254856 | ≥2800 | Marshall Test (60℃) Stability (kN) | T 0.7095.313.1 | ≥3.5 surface

[0137] Example 7

[0138] The raw materials for acrylic epoxy vegetable oil are formulated in the following proportions by weight:

[0139]

[0140] Preparation of acrylic epoxy vegetable oil:

[0141] The epoxy vegetable oil and catalyst in the above proportions were added to a clean three-necked flask (placed in a heat-collecting constant-temperature magnetic stirrer), mixed evenly at a constant temperature of 20°C, stirred and heated to 80°C, and acrylic acid (AA) and the polymerization inhibitor dibutylhydroxytoluene (BHT) were added dropwise. After the addition was completed, the temperature was raised to 130°C, and the reaction was carried out for 7 hours under the condition of stirring at a speed of 800 r / min. Finally, the remaining acrylic acidifying agent was removed by depressurization using an oil pump to obtain acrylic epoxy vegetable oil.

[0142] The raw materials for the acrylic epoxy vegetable oil modified asphalt are proportioned in the following mass ratios:

[0143] 100 parts of aged matrix asphalt

[0144] 15 parts acrylic epoxy vegetable oil

[0145] Preparation of acrylic epoxy vegetable oil modified bitumen:

[0146] The formulation of high-viscosity asphalt: Shuanglong 70# base asphalt was heated to 170℃, and SBS (3% by weight of modified asphalt) was added. The mixture was sheared for 1 hour using a high-speed shearing machine at a shearing speed of 3000 r / min. Then, 2% by weight of 8-24 rubber oil (by weight of modified asphalt) was added, and the temperature was raised to 180℃. Within 1 hour, sulfur stabilizer (1 / 30 by weight of SBS) was added. After the sulfur addition was complete, the mixture was stirred and matured at 175℃ for 5 hours to obtain stable high-viscosity asphalt. Performance testing was conducted after standing at room temperature for 1 day.

[0147] Acrylated epoxy vegetable oil was added to high-viscosity asphalt at a dosage of 8%, and sheared for 50 minutes using a high-speed shearing machine at a shearing speed of 3000 r / min. After the asphalt was allowed to cool naturally to room temperature, acrylic epoxy vegetable oil modified asphalt was obtained. The performance of the modified asphalt was tested and compared with the basic performance of high-viscosity asphalt.

[0148] Table 20 Basic parameters of the acrylic epoxy vegetable oil prepared in Example 7

[0149]

[0150]

[0151] Table 21 Main performance parameters of the acrylic epoxy vegetable oil modified bitumen prepared in Example 7

[0152]

[0153] Table 22 Performance parameters of the acrylic epoxy vegetable oil modified asphalt mixture prepared in Example 7

[0154] Test Item | Unit | Test Method | Drainage Asphalt Mixture | Example 7 | Technical Indicators | Rutting Test | Dynamic Stability (times / mm) | T 0.71952356523 ≥3500 | Residual Stability (%) | T 0.70983.586.5 ≥80 | Residual Strength Ratio of Freeze-Thaw Splitting Test (%) | T 0.72984.688.2 ≥75 | Low Temperature Bending Test | Failure Strain (με) | T 0.71534254258 ≥2800 | Marshall Test (60℃) Stability (kN) | T 0.7095.312.8 ≥3.5 surface

[0155] As can be seen from the test data of the specific embodiments given in Examples 1-7, the modified asphalt prepared by the present invention using acrylic epoxy vegetable oil as a modifier meets the technical standards for modified asphalt specified in the regulations in all aspects. Furthermore, compared with SBS modified asphalt, it improves the low-temperature performance, high-temperature performance, and fatigue resistance of the asphalt; it can be widely used in the paving of asphalt pavements for highways. It reduces the viscosity of the asphalt, thereby lowering the mixing and compaction temperature of the asphalt mixture, which can solve the problem of large amounts of carbon dioxide generated during the traditional hot-mix asphalt mixture process. At the same time, it utilizes biodegradable materials, reducing the production cost of the modifier while being more environmentally friendly. The implementation of this technology can help fill the gap in the domestic application of emerging acrylic epoxy vegetable oils in road engineering, effectively broadening the selection range of asphalt modifiers.

[0156] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. The application of an acrylic epoxy vegetable oil in improving the low-temperature performance of asphalt, characterized in that, The application method is as follows: Acrylated epoxy vegetable oil is added to the base asphalt at a dosage of 3-16 wt.%, and sheared at a shear rate of 3000 r / min for 30-60 min. After cooling, acrylic epoxy vegetable oil modified asphalt is obtained. The preparation method of the acrylic epoxy vegetable oil includes the following steps: 100 parts by weight of epoxy vegetable oil and 1-2 parts by weight of catalyst are mixed at 20-30℃, stirred, and heated to 60-90℃. 6-9 parts by weight of acrylicing agent and 0.3-1 parts by weight of polymerization inhibitor are added. After the addition is complete, the temperature is raised to 100-130℃, and the mixture is heated to 500℃. The reaction is carried out at a constant temperature of -800 r / min for 6-8 h, and the remaining acrylate agent is removed under reduced pressure to obtain acrylated epoxidized vegetable oil. The epoxidized vegetable oil is one or more of epoxidized soybean oil, epoxidized rapeseed oil, epoxidized peanut oil, and epoxidized sunflower seed oil. The catalyst is one or more of triphenylphosphine, hydroquinone, triethylamine, and dimethylacetamide. The polymerization inhibitor is one or more of butylated hydroxytoluene, 4-tert-butylcatechol, and p-hydroxyanisole. The acrylate agent is one or more of acrylic acid, methacrylic acid, 2-propylacrylic acid, and methylbutenoic acid.

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