Amino-modified micro-nanoparticle modified asphalt and a preparation method thereof

Abstract

The application provides an amino-modified micro-nanoparticle modified asphalt and a preparation method thereof. The asphalt is prepared from amino-modified micro-nanoparticles and acid anhydride modified asphalt, wherein the weight ratio of the amino-modified micro-nanoparticles to the acid anhydride modified asphalt is 0.005-0.05:1. The preparation method of the modified asphalt is as follows: a proper amount of amino-modified micro-nanoparticles is added into molten acid anhydride modified asphalt, the temperature is maintained at 100-200 DEG C, and the stirring is continuously carried out at a speed of 1000-2000 rpm for 0.5-5 h to obtain the modified asphalt with uniformly dispersed micro-nanoparticles. The modified asphalt prepared by the application has significantly improved high-temperature performance, enhanced anti-rutting capacity and improved anti-aging performance compared with the base asphalt, and has great application potential in highways in high-temperature regions.

Description

Technical Field

[0001] This invention belongs to the technical field of highway pavement material preparation, specifically relating to an aminated micro / nanoparticle modified asphalt and its preparation method. Background Technology

[0002] Asphalt concrete pavement accounts for the majority of pavement construction due to its advantages such as comfortable driving, low noise, and ease of maintenance. However, under long-term loads and external environmental conditions (high temperature, ultraviolet radiation, etc.), asphalt concrete pavement will experience problems such as rutting and aging. Therefore, the preparation of high-quality asphalt concrete pavement has been a long-standing concern for pavement researchers.

[0003] To obtain high-performance road asphalt, various polymers, anti-rutting agents, antioxidants, and other modifiers are added to the asphalt for modification. Nanomaterials, with their small size effect and surface effect, can alter the microstructure of asphalt, thereby improving its macroscopic properties, and are therefore frequently used in asphalt modification. However, nanoparticles are prone to agglomeration, forming large aggregates that hinder the exertion of the nano-effect and weaken their improving effect on asphalt. Therefore, solving the problem of nanoparticle agglomeration in asphalt is key to further obtaining high-performance nanoparticle-modified asphalt. In addition, we have found that compared to nanoparticles, microparticles are not only cheaper but also have a certain reinforcing effect on asphalt; however, research on microparticle-modified asphalt is limited. Summary of the Invention

[0004] The purpose of this invention is to provide an aminated micro / nanoparticle-modified asphalt and its preparation method, wherein the micro / nanoparticles are uniformly dispersed in the asphalt.

[0005] The aminated micro / nanoparticle-modified asphalt of this invention is prepared from aminated micro / nanoparticles and anhydride-modified asphalt, wherein the weight ratio of aminated micro / nanoparticles to anhydride-modified asphalt is 0.005–0.05:1, preferably 0.005–0.015:1. The preparation method of the modified asphalt is as follows: 0.5–5 wt.% (preferably 0.5–1.5 wt.%) of aminated micro / nanoparticles are added to molten anhydride-modified asphalt; the temperature is maintained at 100–200°C, preferably 150–160°C, and the mixture is continuously stirred at 1000–2000 rpm, preferably 1500–2000 rpm, for 0.5–5 h, preferably 1–1.5 h, to obtain modified asphalt with uniformly dispersed micro / nanoparticles. The aminated micro / nanoparticles are prepared from micro / nanoparticles, epoxy silanes, and polyamine polymers; the anhydride-modified asphalt is prepared from base asphalt, maleic anhydride, and an initiator.

[0006] Based on the technical solution described above, in a preferred embodiment, the preparation method of the aminated micro / nanoparticles is carried out in two steps, including the following steps:

[0007] 1) Micro-nanoparticles and epoxy silanes were added to ethanol solvent and heated under reflux at 100-120°C for 18-30 h. After centrifugation, washing and drying, epoxidized micro-nanoparticles were obtained.

[0008] Specifically, micro / nano particles and epoxy silane are added to an ethanol solvent and refluxed at 100–120°C for 18–30 h with stirring. The concentration of micro / nano particles in the ethanol solvent is 100–200 mg / mL, preferably 125–150 mg / mL. The resulting suspension is then centrifuged at 6000–11000 rpm for 20–25 min, and the supernatant is removed. The precipitate is ultrasonically dispersed in ethanol (e.g., 30 mL) for 5–10 min, centrifuged at 6000–11000 rpm for 20–25 min, the supernatant is removed, and the process is repeated three times. Finally, the product is placed in a vacuum oven at 40–60°C for 12–24 h to obtain dried epoxidized micro / nano particles.

[0009] 2) Add the epoxidized micro / nanoparticles and polyamino polymer obtained in step 1) to an ethanol solvent, heat and reflux at 100-120°C for 18-30 h, and then centrifuge, wash and dry to obtain amination micro / nanoparticles.

[0010] Specifically, the epoxidized micro / nanoparticles obtained in step 1) are added to an ethanol solution of a polyamine polymer and stirred under reflux at 100–120°C for 18–30 h. The concentration of the polyamine polymer in the ethanol solvent is 90–100 mg / mL. The resulting suspension is then centrifuged at 6000–11000 rpm for 20–25 min, and the supernatant is removed. The precipitate is ultrasonically dispersed in deionized water (e.g., 30 mL) for 5–10 min, centrifuged at 6000–11000 rpm for 20–25 min, and the supernatant is removed. This washing process is repeated three times. Finally, the product is placed in a vacuum oven at 40–60°C for 12–24 h to obtain dried amination-modified micro / nanoparticles.

[0011] In the preferred embodiment of the above-described technical solution, the micro-nano particles are SiO2, ZnO, and TiO2 particles with a particle size of 10 nm to 100 μm, preferably 20 nm to 10 μm.

[0012] In a preferred embodiment of the technical solution described above, the epoxy silane is a silane coupling agent having an epoxy group, including 3-glycidyloxypropyltrimethoxysilane (GPTMS), 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, and 3-glycidyl etheroxypropylmethyldiethoxysilane. The weight ratio of micro / nano particles to epoxy silane is 0.4–0.8:1, preferably 0.5–0.6:1.

[0013] In the preferred embodiment of the above-described technical solution, the polyamine polymer is a high molecular weight polymer having no less than two primary or secondary amine groups, including but not limited to polyethyleneimine (PEI) with a weight average molecular weight of 1,000 to 70,000, and the weight ratio of epoxidized micro / nanoparticles to polyamine polymer is 1 to 1.5:1, preferably 1.1 to 1.3:1.

[0014] Based on the above-described technical solution, in a preferred embodiment, the method for preparing the anhydride-modified asphalt is as follows: the base asphalt, maleic anhydride (MAH), and initiator are stirred at 100–200°C at a speed of 200–1000 rpm for 0.5–5 h; the preferred reaction temperature is 120–150°C, and the preferred reaction time is 2–4 h.

[0015] In the preferred embodiment of the technical solution described above, the base asphalt is petroleum asphalt (e.g., No. 70), natural asphalt, or mixed asphalt.

[0016] In the preferred embodiment of the above-described technical solution, the weight ratio of maleic anhydride to base bitumen is 0.04–0.15:1, and more preferably 0.08–0.12:1.

[0017] In the preferred embodiment of the above-described technical solution, the initiator is azobisisobutyronitrile (AIBN), benzoyl peroxide (BPO), and dicumyl peroxide (DCP), and the weight ratio of the initiator to maleic anhydride (MAH) is 0.005 to 0.02:1, preferably 0.01 to 0.015:1.

[0018] This invention first prepares aminated micro / nanoparticles and anhydride-modified asphalt. The -NH2 on the surface of the aminated micro / nanoparticles exhibits lower hydrophilicity compared to the -OH on the surface of the unaminated micro / nanoparticles, making it more compatible with hydrophobic asphalt. The anhydride-modified asphalt, due to the grafting of maleic anhydride, exhibits increased polarity, thereby enhancing the intermolecular forces and improving the high-temperature performance of the asphalt. Simultaneously, the -NH2 on the surface of the aminated micro / nanoparticles can chemically react with the maleic anhydride in the anhydride-modified asphalt to form a three-dimensional cross-linked network, further enhancing the asphalt's performance.

[0019] Beneficial effects:

[0020] 1) The -NH2 group on the surface of aminated micro / nanoparticles exhibits lower hydrophilicity compared to the -OH group on the surface of unmodified micro / nanoparticles, making them more compatible with hydrophobic asphalt. Furthermore, the amino groups on the surface can not only form hydrogen bonds and dipole-dipole interactions with polar groups in asphalt, but also react chemically with anhydride-modified asphalt. All of these factors contribute to improving the dispersibility of micro / nanoparticles in asphalt.

[0021] 2) When acid anhydride compounds are grafted onto asphaltene, the polarity of the asphaltene is enhanced, improving the interaction between asphaltene molecules. Further addition of aminated micro / nanoparticles allows the numerous amino groups on their surface to react with the acid anhydrides on the asphaltene, forming stable chemical bonds and strengthening the intermolecular forces of asphalt. Simultaneously, the micro / nanoparticles possess a large specific surface area, easily absorbing the light components of asphalt and forming a more compact structure. Therefore, compared to base asphalt, aminated micro / nanoparticle-modified asphalt exhibits significantly improved high-temperature performance and rutting resistance, while also exhibiting improved anti-aging properties, making it a promising candidate for application on highways in high-temperature regions.

[0022] 3) Compared to unmodified micro and nanoparticles, amination-modified micro and nanoparticles can achieve relatively uniform dispersion in asphalt without the need for a high-speed shear machine to provide strong shear dispersion. Attached Figure Description

[0023] Figure 1 Softening point diagrams of QL, MQL, 0.5wt.% PEI-SiO2-MQL (20nm), 1.0wt.% PEI-SiO2-MQL (20nm) and 1.5wt.% PEI-SiO2-MQL (20nm).

[0024] Figure 2 SEM images of MQL, 1.0 wt.% SiO2-MQL (20 nm) and 1.0 wt.% PEI-SiO2-MQL (20 nm).

[0025] Figure 3 Softening point diagrams of QL, MQL, 0.5 wt.% PEI-SiO2-MQL (10 μm), 1.0 wt.% PEI-SiO2-MQL (10 μm) and 1.5 wt.% PEI-SiO2-MQL (10 μm).

[0026] Figure 4 Rutting factor plots for QL, MQL, 0.5wt.%PEI-SiO2-MQL (20nm), 1.0wt.%PEI-SiO2-MQL (20nm) and 1.5wt.%PEI-SiO2-MQL (20nm).

[0027] Figure 5 Rutting factor plots for QL, MQL, 0.5wt.%PEI-SiO2-MQL (10μm), 1.0wt.%PEI-SiO2-MQL (10μm) and 1.5wt.%PEI-SiO2-MQL (10μm).

[0028] Figure 6 Figures showing (a) Rutting Factor Aging Index (RPAI), (b) Dynamic Shear Modulus Aging Index (CAI), and (c) Phase Angle Aging Index (PAI) of the base asphalt and modified asphalt in Examples 4 and 5. Detailed Implementation

[0029] This invention provides an aminated micro / nanoparticle-modified asphalt and its preparation method. The method includes the following steps: adding 0.5–5 wt.% of the weight of the anhydride-modified asphalt to molten anhydride-modified asphalt, maintaining the temperature at 100–200°C, and continuously stirring at 1000–2000 rpm for 0.5–5 h to obtain a modified asphalt with uniformly dispersed micro / nanoparticles.

[0030] The following specific embodiments are for further explanation of the content of the present invention and should not be construed as limiting the present invention in any way.

[0031] Example 1

[0032] 1) Add 5.0 g of SiO2 with a particle size of 20 nm, 10 mL of GPTMS, and 40 mL of ethanol to a 100 mL flask and reflux at 110 °C and 700 rpm for 24 h. Then centrifuge the resulting suspension at 11000 rpm for 25 min and remove the supernatant. Disperse the precipitate with 30 mL of ethanol by sonication for 5 min, centrifuge at 11000 rpm for 25 min, remove the supernatant, and repeat the washing process 3 times. Finally, place the product in a vacuum oven at 60 °C for 12 h to obtain dried GPTMS-SiO2 (20 nm). Then take 4.4 g of GPTMS-SiO2 (20 nm) and place it in 40 mL of PEI (M w The mixture was refluxed in an ethanol solution (100 mg / mL) at 110 °C with stirring at 700 rpm for 24 h. The resulting suspension was then centrifuged at 11000 rpm for 25 min, and the supernatant was removed. The precipitate was ultrasonically dispersed in 30 mL of deionized water for 5 min, centrifuged at 11000 rpm for 25 min, and the supernatant was removed. This washing process was repeated three times. Finally, the product was placed in a vacuum oven at 60 °C for 12 h to obtain dried PEI-SiO2.

[0033] 2) Place 60g of Qilu No. 70 petroleum asphalt (QL), 6g of MAH, and 60mg of AIBN into a round-bottom flask, purge with nitrogen, heat to 150℃ and maintain for 0.5h until completely melted and liquid. Then stir at a constant temperature of 200rpm for 3h to obtain maleic anhydride asphalt (MQL).

[0034] 3) Place 40g of MQL in a 100mL beaker and heat to 150℃ until fully melted into a liquid state. Then, weigh out 0.5wt.%, 1.0wt.%, and 1.5wt.% of PEI-SiO2 (20nm) and slowly add them to the molten MQL. Stir at 1500rpm for 1h to obtain 0.5wt.%, 1.0wt.%, and 1.5wt.% PEI-SiO2-MQL (20nm), respectively. Perform softening point tests to characterize the temperature sensitivity of the asphalt. The results are as follows: Figure 1 As shown, compared to matrix bitumen QL, the softening point of PEI-SiO2-MQL (20nm) was increased, indicating that its temperature sensitivity was reduced and its high-temperature performance was enhanced. The increase was the greatest when the PEI-SiO2 (20nm) feed ratio was 1.0wt.%, reaching 65.8℃.

[0035] Meanwhile, temperature scanning experiments were conducted on the prepared 0.5 wt.%, 1.0 wt.%, and 1.5 wt.% PEI-SiO2-MQL (20 nm) using a dynamic shear rheometer, and the results are as follows: Figure 4 As shown, compared to base bitumen QL, the rutting factor of PEI-SiO2-MQL (20nm) at the same temperature was increased, indicating that its rutting resistance was improved.

[0036] Comparative Example 1

[0037] 1) Place 60g of Qilu No. 70 petroleum asphalt (QL), 6g of MAH, and 60mg of AIBN into a round-bottom flask, purge with nitrogen, heat to 150℃ and maintain for 0.5h until completely melted and liquid. Then stir at a constant temperature of 200rpm for 3h to obtain maleic anhydride asphalt (MQL).

[0038] 2) Take 40g of MQL and put it into a 100mL beaker. Heat it to 150℃ and let it melt completely into a liquid state. Then weigh 1wt.% of SiO2 (20nm) and slowly add it into the molten MQL. Stir at 1500rpm for 1h to obtain 1.0wt.% SiO2-MQL (20nm).

[0039] The dispersibility of nanoparticles in modified asphalt was characterized by SEM testing of 1.0 wt.% PEI-SiO2-MQL (20 nm) prepared in Example 1 and 1.0 wt.% SiO2-MQL (20 nm) prepared in Comparative Example 1. The results are as follows: Figure 2 As shown, 1.0 wt.% SiO2-MQL (20 nm) nanoparticles exhibited significant agglomeration in asphalt, while 1.0 wt.% PEI-SiO2-MQL (20 nm) nanoparticles were more uniformly dispersed in asphalt. This indicates that amination of nanoparticles is beneficial for their dispersion in asphalt, making it easier to obtain modified asphalt with uniformly dispersed nanoparticles.

[0040] Example 2

[0041] The only difference between this embodiment and Example 1 is that the particle size of SiO2 is 10 μm, and the softening point test results are as follows. Figure 3 As shown, compared to matrix bitumen QL, the softening point of PEI-SiO2-MQL (10μm) was increased, indicating that its temperature sensitivity was reduced and its high-temperature performance was enhanced. The increase was the greatest when the PEI-SiO2 (10μm) feed ratio was 1.5wt.%, reaching 59.0℃.

[0042] Meanwhile, temperature scanning experiments were performed on the prepared PEI-SiO2-MQL (10 μm), and the results are as follows: Figure 5 As shown, compared to base asphalt QL, the rutting factor of PEI-SiO2-MQL (10μm) at the same temperature was increased, indicating that its rutting resistance was improved.

[0043] Example 3

[0044] 1) Add 5.0 g of SiO2 with a particle size of 20 nm, 10 mL of GPTMS, and 40 mL of ethanol to a 100 mL flask and reflux at 110 °C and 700 rpm for 24 h. Then centrifuge the resulting suspension at 11000 rpm for 25 min and remove the supernatant. Disperse the precipitate with 30 mL of ethanol by sonication for 5 min, centrifuge at 11000 rpm for 25 min, remove the supernatant, and repeat the washing process 3 times. Finally, place the product in a vacuum oven at 60 °C for 12 h to obtain dried GPTMS-SiO2 (20 nm). Then add 4.4 g of GPTMS-SiO2 (20 nm) to 40 mL of ethanol solution (100 mg / mL) containing PEI (Mw = 1000) and reflux at 110 °C and 700 rpm for 24 h. Then centrifuge the resulting suspension at 11000 rpm for 25 min and remove the supernatant. The precipitate was ultrasonically dispersed in 30 mL of deionized water for 5 min, then centrifuged at 11000 rpm for 25 min. The supernatant was removed, and the washing was repeated three times. Finally, the product was placed in a vacuum oven at 60 °C for 12 h to obtain dried PEI-SiO2.

[0045] 2) Place 60g of Qilu No. 70 petroleum asphalt (QL), 6g of MAH, and 70mg of DCP into a round-bottom flask, purge with nitrogen, heat to 160℃ and maintain for 0.5h until completely melted and liquid. Then stir at a constant temperature of 500rpm for 4h to obtain anhydride asphalt (MQL).

[0046] 3) Take 40g of anhydride-modified asphalt (MQL) and place it in a 100mL beaker. Heat it to 160℃ to fully melt it into a liquid state. Then, weigh out 0.5wt.%, 1.0wt.%, and 1.5wt.% of PEI-SiO2 (20nm) and slowly add them to the molten anhydride-modified asphalt. Stir at 2000rpm for 1.5h to obtain nanoparticle-modified asphalt with PEI-SiO2 (20nm) feed ratios of 0.5wt.%, 1.0wt.%, and 1.5wt.%, respectively. The softening points were tested with a softening point tester and found to be 62.6℃, 67.5℃, and 61.6℃, respectively. Compared with the base asphalt's 46.8℃, all softening points were improved, indicating that the high-temperature stability was enhanced.

[0047] Example 4

[0048] 1) Add 6.0 g of SiO2 with a particle size of 20 nm, 10 mL of GPTMS, and 40 mL of ethanol to a 100 mL flask and reflux at 110 °C and 700 rpm for 28 h. Then centrifuge the resulting suspension at 11000 rpm for 25 min and remove the supernatant. Disperse the precipitate with 30 mL of ethanol by sonication for 5 min, centrifuge at 11000 rpm for 25 min, remove the supernatant, and repeat the washing process 3 times. Finally, place the product in a vacuum oven at 60 °C for 12 h to obtain dried GPTMS-SiO2 (20 nm). Then take 5 g of GPTMS-SiO2 (20 nm) and place it in 40 mL of PEI (M w The PEI-SiO2 was dissolved in an ethanol solution (100 mg / mL) containing 20000 mg / mL and refluxed at 110 °C and 700 rpm for 30 h with stirring. The resulting suspension was then centrifuged at 11000 rpm for 25 min, and the supernatant was removed. The precipitate was ultrasonically dispersed in 30 mL of deionized water for 5 min, centrifuged at 11000 rpm for 25 min, and the supernatant was removed. This washing process was repeated three times. Finally, the product was placed in a vacuum oven at 60 °C for 12 h to obtain dried PEI-SiO2.

[0049] 2) Place 60g of Qilu No. 70 petroleum asphalt (QL), 6g of MAH, and 70mg of AIBN into a round-bottom flask, purge with nitrogen, heat to 120℃ and maintain for 0.5h until completely melted and liquid. Then stir at a constant temperature of 500rpm for 2h to obtain anhydride asphalt (MQL).

[0050] 3) Take 40g of anhydride-modified asphalt (MQL) and place it in a 100mL beaker. Heat it to 160℃ until it is fully melted and liquid. Then, weigh 1.0wt.% PEI-SiO2 (20nm) and slowly add it to the molten anhydride-modified asphalt. Stir at 2000rpm for 1.5h to obtain modified asphalt. Perform a thin-film oven aging test on it to obtain RPAI, CAI, and PAI. The results are as follows: Figure 6 As shown, the modified asphalt exhibits lower RPAI and CAI and higher PAI compared to the base asphalt, indicating improved anti-aging properties.

[0051] Example 5

[0052] 1) Add 6.0 g of SiO2 with a particle size of 10 μm, 10 mL of GPTMS, and 40 mL of ethanol to a 100 mL flask and reflux at 110 °C and 700 rpm for 28 h. Then centrifuge the resulting suspension at 11000 rpm for 25 min and remove the supernatant. Disperse the precipitate with 30 mL of ethanol by sonication for 5 min, centrifuge at 11000 rpm for 25 min, remove the supernatant, and repeat the washing process 3 times. Finally, place the product in a vacuum oven at 60 °C for 12 h to obtain dried GPTMS-SiO2 (20 nm). Then take 5 g of GPTMS-SiO2 (20 nm) and place it in 40 mL of PEI (M w The PEI-SiO2 was dissolved in an ethanol solution (100 mg / mL) containing 70000 mg / mL and refluxed at 110 °C and 700 rpm for 30 h. The resulting suspension was then centrifuged at 11000 rpm for 25 min, and the supernatant was removed. The precipitate was ultrasonically dispersed in 30 mL of deionized water for 5 min, centrifuged at 11000 rpm for 25 min, and the supernatant was removed. This washing process was repeated three times. Finally, the product was placed in a vacuum oven at 60 °C for 12 h to obtain dried PEI-SiO2.

[0053] 2) Place 60g of Qilu No. 70 petroleum asphalt (QL), 6g of MAH, and 70mg of AIBN into a round-bottom flask, purge with nitrogen, heat to 120℃ and maintain for 0.5h until completely melted and liquid. Then stir at a constant temperature of 500rpm for 2h to obtain anhydride asphalt (MQL).

[0054] 3) Take 40g of anhydride-modified asphalt (MQL) and place it in a 100mL beaker. Heat it to 160℃ until it is fully melted and liquid. Then, weigh 1.5wt.% of PEI-SiO2 (10μm) and slowly add it to the molten anhydride-modified asphalt. Stir at 2000rpm for 1.5h to obtain modified asphalt. Perform a thin-film oven aging test on it to obtain RPAI, CAI, and PAI. The results are as follows: Figure 6 As shown, the modified asphalt exhibits lower RPAI and CAI and higher PAI compared to the base asphalt, indicating improved anti-aging properties.

Claims

1. An aminated micro / nanoparticle-modified asphalt, characterized in that: It is prepared from aminated micro / nanoparticles and acid anhydride pitch, wherein the weight ratio of aminated micro / nanoparticles to acid anhydride pitch is 0.005~0.05:1; The method for preparing the aforementioned aminated micro / nanoparticles includes the following steps: 1) Micro-nanoparticles and epoxy silanes were added to ethanol solvent and heated under reflux at 100~120℃ for 18~30h. Then, the epoxidized micro-nanoparticles were obtained by centrifugation and drying. 2) Add the epoxidized micro-nanoparticles and polyamine polymer obtained in step 1) to ethanol solvent, heat and reflux at 100~120℃ for 18~30 h, and then centrifuge and dry to obtain aminated micro-nanoparticles. The polyamine polymer is a high molecular weight polymer having not less than two primary or secondary amine groups, including polyethyleneimine with a weight average molecular weight of 1,000 to 70,000. The preparation method of the anhydride-modified asphalt is as follows: the base asphalt, maleic anhydride and initiator are stirred at 100~200℃ and 200~1000 rpm for 0.5~5 h. The method for preparing aminated micro / nanoparticle modified asphalt involves adding aminated micro / nanoparticles to molten anhydride asphalt, maintaining the temperature at 100-200 ℃, and continuously stirring at 1000-2000 rpm for 0.5-5 h to obtain aminated micro / nanoparticle modified asphalt.

2. The aminated micro / nanoparticle modified asphalt as described in claim 1, characterized in that: The micro-nano particles are micro-nano SiO2, ZnO or TiO2 particles with a particle size of 10 nm to 100 μm.

3. The aminated micro / nanoparticle modified asphalt as described in claim 1, characterized in that: The epoxy silane is a silane coupling agent with an epoxy group, including 3-glycidyloxypropyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane or 3-glycidyl etheroxypropylmethyldiethoxysilane, with a weight ratio of micro / nano particles to epoxy silane of 0.4~0.8:1; the concentration of micro / nano particles in ethanol solvent is 100~200 mg / mL.

4. The aminated micro / nanoparticle modified asphalt as described in claim 1, characterized in that: The weight ratio of epoxidized micro / nanoparticles to polyamine polymers is 1–1.5:1; the concentration of polyamine polymers in ethanol solvent is 90–100 mg / mL.

5. The aminated micro / nanoparticle modified asphalt as described in claim 1, characterized in that: The base asphalt is petroleum asphalt, natural asphalt, or mixed asphalt.

6. The aminated micro / nanoparticle modified asphalt according to claim 1, characterized in that: The weight ratio of maleic anhydride to base pitch is 0.04~0.15:

1.

7. The aminated micro / nanoparticle modified asphalt as described in claim 1, characterized in that: The initiator is azobisisobutyronitrile, benzoyl peroxide, or dicumyl peroxide, and the weight ratio of the initiator to maleic anhydride is 0.005~0.02:1.

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