Ultrathin asphalt material with high skid resistance and preparation method thereof

Abstract

The invention relates to the technical field of ultra-thin asphalt, in particular to an ultra-thin asphalt material with high skid resistance and a preparation method thereof, and the ultra-thin asphalt material comprises the following raw materials in parts by weight: 55-60 parts of matrix asphalt, 30-35 parts of coarse and fine aggregate, 11-15 parts of a silicon carbide doped and regulated boron nitride agent and 7-11 parts of a functional stabilizer. According to the ultrathin asphalt material disclosed by the invention, the matrix asphalt is matched with the coarse and fine aggregates, and meanwhile, the silicon carbide-doped boron nitride and the functional stabilizer are added for blending and coordinating, so that the skid resistance, the wear resistance and the impermeability of the obtained ultrathin asphalt material are improved in a balanced and coordinated manner; and the product has obvious freezing-resistant and cold-resistant stability effects.

Description

Technical Field

[0001] This invention relates to the field of ultra-thin asphalt technology, specifically to an ultra-thin asphalt material with high anti-skid properties and its preparation method. Background Technology

[0002] Ultra-thin asphalt concrete is a small-particle, multi-crushed asphalt mixture primarily used for paving roads with early signs of damage. It forms a very thin protective layer on the surface, significantly extending the road's service life through reinforcement and repair. However, existing ultra-thin asphalt materials, in their pursuit of optimized skid resistance, often suffer from poor abrasion resistance and impermeability. Achieving a balanced and coordinated improvement in performance is difficult, and the products also exhibit poor freeze-thaw and cold-weather stability, limiting their overall efficiency. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this invention is to provide a high-skid-resistance ultrathin asphalt material and its preparation method, so as to solve the problems mentioned in the background art.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] This invention provides a high-slip-resistance ultrathin asphalt material, which comprises the following raw materials in parts by weight:

[0006] The matrix consists of 55-60 parts asphalt, 30-35 parts coarse and fine aggregates, 11-15 parts boron nitride agent with silicon carbide doping and 7-11 parts functional stabilizer.

[0007] Preferably, the matrix asphalt is 70# matrix asphalt; the coarse and fine aggregates are prepared by mixing coarse aggregate and fine aggregate in a weight ratio of 2:1, the coarse aggregate is basalt with a gradation of 4mm, and the fine aggregate is limestone with a gradation of 0.15mm.

[0008] Preferably, the method for preparing the silicon carbide-doped boron nitride agent is as follows:

[0009] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 60-65℃ for 1 hour to obtain preheated boron nitride.

[0010] The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:(5-7). After stirring, the modified boron nitride solution was obtained.

[0011] SO2: Add 3-5 parts of barium titanate and 2-3 parts of zirconium oxide to 5-8 parts of sodium silicate solution, then add 2-3 parts of yttrium oxide, stir evenly to obtain doped solution;

[0012] S03: Immerse silicon carbide powder in a doping solution that is 3-5 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, and then calcine it at 200-220℃ for 1 hour. After calcineation, calcined silicon carbide is obtained.

[0013] S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

[0014] Preferably, the stirring speed for the stirring modification treatment is 450-500 r / min, and the stirring time is 1 h; the ultrasonic power for the ultrasonic immersion treatment is 350-400 W, and the ultrasonic treatment time is 1 h.

[0015] Preferably, the sodium silicate solution has a mass fraction of 2-5%; and the potassium permanganate solution has a mass fraction of 5-8%.

[0016] Preferably, the modified liquid is prepared by:

[0017] The sillimanite solution is prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:5. Then, 3-5 parts of carbon nanotubes and 2-3 parts of barium nitrate are added to 4-7 parts of sillimanite solution for adjustment to obtain carbon nanotube compound solution.

[0018] The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

[0019] Preferably, the stirring speed for the first conditioning treatment is 550-750 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 300-400 r / min, and the stirring time is 1 h.

[0020] Preferably, the preparation method of the functional stabilizer is as follows:

[0021] S11: α-Al2O3, basalt fiber and bismuth titanate are compounded in a weight ratio of 3:2:1 and then sintered at 200-230℃ for 1h to obtain α-Al2O3 body;

[0022] S12: Mix 4-7 parts of mullite powder, 5-8 parts of sodium lignosulfonate solution and 1-2 parts of silane coupling agent KH550 evenly, then add 3-5 parts of titanium dioxide and continue to stir evenly to obtain the functional regulating liquid.

[0023] The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

[0024] Preferably, the sodium lignosulfonate solution has a mass fraction of 5-8%.

[0025] This invention also provides a method for preparing an ultra-thin asphalt material with high anti-skid properties, comprising the following steps:

[0026] Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 165-170℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The ultra-thin asphalt material of this invention uses base asphalt combined with coarse and fine aggregates, and simultaneously adds boron nitride agent and functional stabilizer adjusted by silicon carbide to improve and optimize the anti-slip performance, wear resistance and impermeability of the ultra-thin asphalt material. The performance is balanced and coordinated, and the product has significant freeze-thaw resistance and cold-resistant stability.

[0029] 2. The boron nitride agent regulated by silicon carbide doping utilizes boron nitride treated with potassium permanganate solution and preheating to optimize its activity. Simultaneously, the modified boron nitride solution is further improved through stirring, resulting in a better blending effect with the calcined silicon carbide agent. The calcined silicon carbide agent is produced by ultrasonically impregnating silicon carbide powder with a doping solution followed by calcination. The barium titanate and zirconium oxide in the doping solution, combined with sodium silicate solution and yttrium oxide, work synergistically to blend the silicon carbide, filling structural gaps and further enhancing the product's performance. The product's performance is improved by using nano-attapulgite clay activated with acid solution. Simultaneously, a sillimanite solution is prepared by first combining sillimanite and a 5% lanthanum chloride solution, then carbon nanotubes and barium nitrate are added for a first conditioning treatment. A carbon nanotube compound solution is prepared by combining high-specific-surface-area carbon nanotubes with sillimanite and other raw materials, and then further treated with activated nano-attapulgite clay for a second conditioning treatment. Through the combined first and second conditioning and conditioning improvements, the resulting modified solution enhances the boron nitride system structure, thereby further improving the system's performance and optimizing the product's performance.

[0030] 3. The functional stabilizer is improved by sintering α-Al2O3, basalt fiber and bismuth titanate, and further improved and optimized with functional conditioning liquid. Mullite powder, sodium lignosulfonate solution and silane coupling agent KH550 and titanium oxide in functional conditioning liquid are co-blended and synergistically formulated. Through the co-blending and synergistic effect between raw materials, with mullite as the matrix and in combination with titanium oxide system, the α-Al2O3 body is further blended and synergistically formulated. The resulting functional stabilizer has a better synergistic effect with the boron nitride agent regulated by silicon carbide doping, thereby further improving the performance of the product.

[0031] Specific implementation party

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This embodiment provides a high-slip-resistant ultra-thin asphalt material, which comprises the following raw materials in parts by weight:

[0034] The matrix consists of 55-60 parts asphalt, 30-35 parts coarse and fine aggregates, 11-15 parts boron nitride agent with silicon carbide doping and 7-11 parts functional stabilizer.

[0035] In this embodiment, the base asphalt is 70# base asphalt; the coarse and fine aggregates are prepared by mixing coarse aggregate and fine aggregate in a weight ratio of 2:1, with the coarse aggregate being 4mm graded basalt and the fine aggregate being 0.15mm graded limestone.

[0036] The preparation method of the silicon carbide-doped boron nitride agent in this embodiment is as follows:

[0037] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 60-65℃ for 1 hour to obtain preheated boron nitride.

[0038] The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:(5-7). After stirring, the modified boron nitride solution was obtained.

[0039] SO2: Add 3-5 parts of barium titanate and 2-3 parts of zirconium oxide to 5-8 parts of sodium silicate solution, then add 2-3 parts of yttrium oxide, stir evenly to obtain doped solution;

[0040] S03: Immerse silicon carbide powder in a doping solution that is 3-5 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, and then calcine it at 200-220℃ for 1 hour. After calcineation, calcined silicon carbide is obtained.

[0041] S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

[0042] In this embodiment, the stirring speed for the stirring modification treatment is 450-500 r / min, and the stirring time is 1 h; the ultrasonic power for the ultrasonic immersion treatment is 350-400 W, and the ultrasonic treatment time is 1 h.

[0043] In this embodiment, the sodium silicate solution has a mass fraction of 2-5%; the potassium permanganate solution has a mass fraction of 5-8%.

[0044] The preparation method of the modified liquid in this embodiment is as follows:

[0045] The sillimanite solution is prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:5. Then, 3-5 parts of carbon nanotubes and 2-3 parts of barium nitrate are added to 4-7 parts of sillimanite solution for adjustment to obtain carbon nanotube compound solution.

[0046] The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

[0047] In this embodiment, the stirring speed for the first conditioning treatment is 550-750 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 300-400 r / min, and the stirring time is 1 h.

[0048] The preparation method of the functional stabilizer in this embodiment is as follows:

[0049] S11: α-Al2O3, basalt fiber and bismuth titanate are compounded in a weight ratio of 3:2:1 and then sintered at 200-230℃ for 1h to obtain α-Al2O3 body;

[0050] S12: Mix 4-7 parts of mullite powder, 5-8 parts of sodium lignosulfonate solution and 1-2 parts of silane coupling agent KH550 evenly, then add 3-5 parts of titanium dioxide and continue to stir evenly to obtain the functional regulating liquid.

[0051] The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

[0052] The sodium lignosulfonate solution in this embodiment has a mass fraction of 5-8%.

[0053] This embodiment provides a method for preparing a high-skid-resistance ultrathin asphalt material, comprising the following steps:

[0054] Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 165-170℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

[0055] Example 1.

[0056] This embodiment provides a high-slip-resistant ultra-thin asphalt material, which comprises the following raw materials in parts by weight:

[0057] The composition consists of 55 parts matrix asphalt, 30 parts coarse and fine aggregates, 11 parts boron nitride agent regulated by silicon carbide doping, and 7 parts functional stabilizer.

[0058] In this embodiment, the base asphalt is 70# base asphalt; the coarse and fine aggregates are prepared by mixing coarse aggregate and fine aggregate in a weight ratio of 2:1, with the coarse aggregate being 4mm graded basalt and the fine aggregate being 0.15mm graded limestone.

[0059] The preparation method of the silicon carbide-doped boron nitride agent in this embodiment is as follows:

[0060] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 60°C for 1 hour to obtain preheated boron nitride.

[0061] The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:5. After stirring, the modified boron nitride solution was obtained.

[0062] S02: Add 3 parts barium titanate and 2 parts zirconium oxide to 5 parts sodium silicate solution, then add 2 parts yttrium oxide, stir evenly to obtain doped solution;

[0063] S03: Immerse silicon carbide powder in a doping solution with a volume of 3 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, then calcine it at 200℃ for 1 hour. After calcineation, calcined silicon carbide agent is obtained.

[0064] S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

[0065] In this embodiment, the stirring speed for the stirring modification treatment was 450 r / min, and the stirring time was 1 h; the ultrasonic power for the ultrasonic immersion treatment was 350 W, and the ultrasonic time was 1 h.

[0066] In this embodiment, the sodium silicate solution has a mass fraction of 2%; the potassium permanganate solution has a mass fraction of 5%.

[0067] The preparation method of the modified liquid in this embodiment is as follows:

[0068] The sillimanite solution is prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:5. Then, 3 parts carbon nanotubes and 2 parts barium nitrate are added to 4 parts sillimanite solution for adjustment to obtain carbon nanotube compound solution.

[0069] The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

[0070] In this embodiment, the stirring speed for the first conditioning treatment is 550 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 300 r / min, and the stirring time is 1 h.

[0071] The preparation method of the functional stabilizer in this embodiment is as follows:

[0072] S11: α-Al2O3, basalt fiber and bismuth titanate are compounded in a weight ratio of 3:2:1 and then sintered at 200℃ for 1h to obtain α-Al2O3 body;

[0073] S12: Mix 4 parts of mullite powder, 5 parts of sodium lignosulfonate solution and 1 part of silane coupling agent KH550 evenly, then add 3 parts of titanium dioxide and continue to stir evenly to obtain the functional regulating liquid.

[0074] The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

[0075] The sodium lignosulfonate solution in this embodiment has a mass fraction of 5%.

[0076] This embodiment provides a method for preparing a high-skid-resistance ultrathin asphalt material, comprising the following steps:

[0077] Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 165℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

[0078] Example 2.

[0079] This embodiment provides a high-slip-resistant ultra-thin asphalt material, which comprises the following raw materials in parts by weight:

[0080] The composition consists of 60 parts base asphalt, 35 parts coarse and fine aggregates, 15 parts boron nitride agent regulated by silicon carbide doping, and 11 parts functional stabilizer.

[0081] In this embodiment, the base asphalt is 70# base asphalt; the coarse and fine aggregates are prepared by mixing coarse aggregate and fine aggregate in a weight ratio of 2:1, with the coarse aggregate being 4mm graded basalt and the fine aggregate being 0.15mm graded limestone.

[0082] The preparation method of the silicon carbide-doped boron nitride agent in this embodiment is as follows:

[0083] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 65°C for 1 hour to obtain preheated boron nitride.

[0084] The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:7. After stirring, the modified boron nitride solution was obtained.

[0085] S02: Add 5 parts barium titanate and 3 parts zirconium oxide to 8 parts sodium silicate solution, then add 3 parts yttrium oxide, stir evenly to obtain doped solution;

[0086] S03: Immerse silicon carbide powder in a doping solution with a volume of 5 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, and then calcine it at 220°C for 1 hour. After calcineation, calcined silicon carbide agent is obtained.

[0087] S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

[0088] In this embodiment, the stirring speed for the stirring modification treatment was 500 r / min, and the stirring time was 1 h; the ultrasonic power for the ultrasonic immersion treatment was 400 W, and the ultrasonic treatment time was 1 h.

[0089] In this embodiment, the sodium silicate solution has a mass fraction of 5%; the potassium permanganate solution has a mass fraction of 8%.

[0090] The preparation method of the modified liquid in this embodiment is as follows:

[0091] The sillimanite solution is prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:5. Then, 5 parts carbon nanotubes and 3 parts barium nitrate are added to 7 parts sillimanite solution for adjustment to obtain carbon nanotube compound solution.

[0092] The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

[0093] In this embodiment, the stirring speed for the first conditioning treatment is 750 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 400 r / min, and the stirring time is 1 h.

[0094] The preparation method of the functional stabilizer in this embodiment is as follows:

[0095] S11: α-Al2O3, basalt fiber and bismuth titanate are combined in a weight ratio of 3:2:1 and then sintered at 230℃ for 1 h to obtain α-Al2O3 body;

[0096] S12: Mix 7 parts mullite powder, 8 parts sodium lignosulfonate solution and 2 parts silane coupling agent KH550 evenly, then add 5 parts titanium oxide and continue to stir evenly to obtain the functional regulating liquid.

[0097] The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

[0098] The sodium lignosulfonate solution in this embodiment has a mass fraction of 8%.

[0099] This embodiment provides a method for preparing a high-skid-resistance ultrathin asphalt material, comprising the following steps:

[0100] Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 170℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

[0101] Example 3.

[0102] This embodiment provides a high-slip-resistant ultra-thin asphalt material, which comprises the following raw materials in parts by weight:

[0103] The matrix consists of 57.5 parts asphalt, 32.5 parts coarse and fine aggregates, 13 parts boron nitride agent regulated by silicon carbide doping, and 9 parts functional stabilizer.

[0104] In this embodiment, the base asphalt is 70# base asphalt; the coarse and fine aggregates are prepared by mixing coarse aggregate and fine aggregate in a weight ratio of 2:1, with the coarse aggregate being 4mm graded basalt and the fine aggregate being 0.15mm graded limestone.

[0105] The preparation method of the silicon carbide-doped boron nitride agent in this embodiment is as follows:

[0106] S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 62.5℃ for 1 hour to obtain preheated boron nitride.

[0107] The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:6. After stirring, the modified boron nitride solution was obtained.

[0108] S02: Add 4 parts barium titanate and 2.5 parts zirconium oxide to 6.5 parts sodium silicate solution, then add 2.5 parts yttrium oxide, stir evenly to obtain doped solution;

[0109] S03: Immerse silicon carbide powder in a doping solution with a volume of 4 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, and then calcine it at 210℃ for 1 hour. After calcineation, calcined silicon carbide is obtained.

[0110] S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

[0111] In this embodiment, the stirring speed for the stirring modification treatment was 470 r / min, and the stirring time was 1 h; the ultrasonic power for the ultrasonic immersion treatment was 375 W, and the ultrasonic time was 1 h.

[0112] In this embodiment, the sodium silicate solution has a mass fraction of 3.5%; the potassium permanganate solution has a mass fraction of 6.5%.

[0113] The preparation method of the modified liquid in this embodiment is as follows:

[0114] The sillimanite solution was prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:5. Then, 4 parts carbon nanotubes and 2.5 parts barium nitrate were added to 5.5 parts sillimanite solution for adjustment to obtain carbon nanotube compound solution.

[0115] The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

[0116] In this embodiment, the stirring speed for the first conditioning treatment is 600 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 350 r / min, and the stirring time is 1 h.

[0117] The preparation method of the functional stabilizer in this embodiment is as follows:

[0118] S11: α-Al2O3, basalt fiber and bismuth titanate are compounded in a weight ratio of 3:2:1 and then sintered at 215℃ for 1h to obtain α-Al2O3 body;

[0119] S12: Mix 5.5 parts of mullite powder, 6.5 parts of sodium lignosulfonate solution and 1.5 parts of silane coupling agent KH550 evenly, then add 4 parts of titanium dioxide and continue to stir evenly to obtain the functional regulating liquid.

[0120] The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

[0121] The sodium lignosulfonate solution in this embodiment has a mass fraction of 6.5%.

[0122] This embodiment provides a method for preparing a high-skid-resistance ultrathin asphalt material, comprising the following steps:

[0123] Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 167℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

[0124] Comparative Example 1.

[0125] Unlike Example 3, no silicon carbide-modified boron nitride agent was added.

[0126] Comparative Example 2.

[0127] Unlike Example 3, no calcined silicon carbide was added in the preparation of the boron nitride agent regulated by silicon carbide doping.

[0128] Comparative Example 3.

[0129] Unlike Example 3, no dopant solution was added during the preparation of the calcined silicon carbide agent.

[0130] Comparative Example 4.

[0131] Unlike Example 3, barium titanate and zirconium oxide were not added to the doping solution.

[0132] Comparative Example 5.

[0133] Unlike Example 3, no modified boron nitride solution was added in the preparation of the silicon carbide-doped boron nitride agent.

[0134] Comparative Example 6.

[0135] Unlike Example 3, no modification solution was added to the modified boron nitride solution.

[0136] Comparative Example 7.

[0137] Unlike Example 3, no dried nano-attapulgites were added to the modified liquid.

[0138] Comparative Example 8.

[0139] Unlike Example 3, no carbon nanotube compounding solution was added to the modified solution.

[0140] Comparative Example 9.

[0141] Unlike Example 3, no carbon nanotubes or barium nitrate were added to the carbon nanotube compounding solution.

[0142] Comparative Example 10.

[0143] Unlike Example 3, no sillimanite solution was added to the carbon nanotube compounding solution.

[0144] Comparative Example 11.

[0145] Unlike Example 3, no functional stabilizer was added.

[0146] Examples 1-3 and Comparative Examples 1-11 were tested for anti-slip performance, abrasion resistance, and impermeability under normal conditions, as well as for their cold and freeze resistance stability (the products were placed at -30℃ for 12 days). The test results are as follows.

[0147]

[0148] The product of Embodiment 3 of the present invention has excellent impermeability, anti-slip and wear resistance, and the product has significant antifreeze and cold-resistant stability.

[0149] As can be seen from Comparative Examples 1-11 and Example 3, the performance of the product deteriorates significantly when neither the boron nitride agent with silicon carbide doping nor the functional stabilizer is added. The product's performance is significantly improved when the two are blended and synergistically combined. At the same time, the performance deteriorates more significantly when the functional stabilizer is not added.

[0150] In the preparation of boron nitride agent regulated by silicon carbide doping, calcined silicon carbide agent was not added, doping solution was not added in the preparation of calcined silicon carbide agent, and barium titanate and zirconium oxide were not added in the doping solution. As a result, the performance of the product deteriorated to varying degrees. The product performance was most significantly improved when the calcined silicon carbide agent specific to this invention was used.

[0151] In the preparation of boron nitride agents regulated by silicon carbide doping, no modified boron nitride solution was added; no modified solution was added to the modified boron nitride solution; no dried nano-attapulgite was added to the modified solution; no carbon nanotube compound solution was added to the modified solution; no carbon nanotubes and barium nitrate were added to the carbon nanotube compound solution; and no sillimanite solution was added to the carbon nanotube compound solution. Consequently, the performance of the product deteriorated to varying degrees. The modified boron nitride solution prepared by modifying the modified solution obtained using the specific method of this invention exhibited the most significant performance improvement. Modified solutions obtained by other methods were not as effective as those of this invention.

[0152] This invention further explores the product performance through the preparation of functional stabilizers;

[0153] Experimental Example 1.

[0154] Same as Example 3, except that α-Al2O3 was not added in the preparation of the functional stabilizer.

[0155] Experimental Example 2.

[0156] Same as Example 3, except that α-Al2O3 was not added to the α-Al2O3 body.

[0157] Experimental Example 3.

[0158] Same as Example 3, except that basalt fibers and bismuth titanate were not added to the α-Al2O3 body.

[0159] Experimental Example 4.

[0160] Same as Example 3, except that mullite powder and titanium dioxide were not added to the functional conditioning liquid.

[0161]

[0162] As can be seen from Experiments 1-4, the performance of the product deteriorates significantly when α-Al2O3 is not added during the preparation of the functional stabilizer. Furthermore, the performance of the product also tends to deteriorate when α-Al2O3 is not added to the α-Al2O3, when basalt fiber and bismuth titanate are not added to the α-Al2O3, or when mullite powder and titanium oxide are not added to the functional regulating liquid. Only the functional stabilizer prepared by using the α-Al2O3 obtained by the specific method of this invention in combination with the specific functional regulating liquid has the most significant performance effect.

[0163] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0164] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highly slip-resistant ultrathin asphalt material, characterized in that, The ultrathin asphalt material comprises the following raw materials in parts by weight: The matrix consists of 55-60 parts asphalt, 30-35 parts coarse and fine aggregates, 11-15 parts boron nitride agent with silicon carbide doping and 7-11 parts functional stabilizer.

2. The ultra-thin asphalt material with high anti-slip properties according to claim 1, characterized in that, The matrix asphalt is 70# base asphalt; the coarse and fine aggregates are prepared by mixing coarse and fine aggregates in a weight ratio of 2:1, with the coarse aggregate being 4mm graded basalt and the fine aggregate being 0.15mm graded limestone.

3. The ultra-thin asphalt material with high anti-slip properties according to claim 1, characterized in that, The preparation method of the silicon carbide-doped boron nitride agent is as follows: S01: First, stir boron nitride in a sufficient amount of 5% potassium permanganate solution until homogeneous, then rinse, filter, and dry. Preheat the dried boron nitride at 60-65℃ for 1 hour to obtain preheated boron nitride. The preheated boron nitride and the modified solution were stirred and modified at a weight ratio of 4:(5-7). After stirring, the modified boron nitride solution was obtained. SO2: Add 3-5 parts of barium titanate and 2-3 parts of zirconium oxide to 5-8 parts of sodium silicate solution, then add 2-3 parts of yttrium oxide, stir evenly to obtain doped solution; S03: Immerse silicon carbide powder in a doping solution that is 3-5 times the total amount of silicon carbide powder and ultrasonically immerse it. After immersion, filter and dry it, and then calcine it at 200-220℃ for 1 hour. After calcineation, calcined silicon carbide is obtained. S04: The calcined silicon carbide agent and the modified boron nitride liquid were mixed at a weight ratio of 5:3 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was filtered and dried to obtain the boron nitride agent doped with silicon carbide.

4. The ultra-thin asphalt material with high anti-slip properties according to claim 3, characterized in that, The stirring modification treatment is carried out at a stirring speed of 450-500 r / min for 1 h; the ultrasonic immersion treatment is carried out at an ultrasonic power of 350-400 W for 1 h.

5. The ultra-thin asphalt material with high anti-slip properties according to claim 3, characterized in that, The sodium silicate solution has a mass fraction of 2-5%; the potassium permanganate solution has a mass fraction of 5-8%.

6. The ultra-thin asphalt material with high anti-slip properties according to claim 3, characterized in that, The modified liquid is prepared by: The sillimanite solution is prepared by stirring sillimanite and 5% lanthanum chloride solution at a weight ratio of 3:

5. Then, 3-5 parts of carbon nanotubes and 2-3 parts of barium nitrate are added to 4-7 parts of sillimanite solution for adjustment to obtain carbon nanotube compound solution. The nano-attapulgite clay is then thoroughly mixed in a sufficient amount of 5% sulfuric acid solution, followed by washing and drying. The dried nano-attapulgite and carbon nanotube compound solution is then treated with a 3:5 weight ratio to obtain the modified solution.

7. The ultra-thin asphalt material with high anti-slip properties according to claim 6, characterized in that, The stirring speed for the first conditioning treatment is 550-750 r / min, and the stirring time is 30 min; the stirring speed for the second conditioning treatment is 300-400 r / min, and the stirring time is 1 h.

8. The ultra-thin asphalt material with high anti-slip properties according to claim 1, characterized in that, The preparation method of the functional stabilizer is as follows: S11: α-Al2O3, basalt fiber and bismuth titanate are compounded in a weight ratio of 3:2:1 and then sintered at 200-230℃ for 1h to obtain α-Al2O3 body; S12: Mix 4-7 parts of mullite powder, 5-8 parts of sodium lignosulfonate solution and 1-2 parts of silane coupling agent KH550 evenly, then add 3-5 parts of titanium dioxide and continue to stir evenly to obtain the functional regulating liquid. The α-Al2O3 matrix and the functional regulating liquid were mixed thoroughly at a weight ratio of 4:7, then filtered and dried to obtain the functional stabilizer.

9. The ultra-thin asphalt material with high anti-slip properties according to claim 8, characterized in that, The sodium lignosulfonate solution has a mass fraction of 5-8%.

10. A method for preparing a high-skid-resistance ultrathin asphalt material according to any one of claims 1-9, characterized in that, Includes the following steps: Coarse and fine aggregates, boron nitride agent with silicon carbide doping and functional stabilizer are mixed evenly to obtain a premix. Then, the temperature of the base asphalt is controlled at 165-170℃, and the premix is ​​added to it and stirred evenly to obtain an ultra-thin asphalt material.

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