Rubber modified asphalt product and preparation method thereof

Abstract

The invention discloses a rubber modified asphalt product and a preparation method thereof. The rubber modified asphalt product comprises the following raw materials in parts by weight: 55-60 parts of base asphalt, 15-20 parts of rubber particles, 12-14 parts of a hybrid-based modified filler, 8-11 parts of aromatic oil, 5-8 parts of an additive, 2-3 parts of microcrystalline wax, 2-3 parts of a silane coupling agent and 2-4 parts of an antioxidant. According to the rubber modified asphalt product disclosed by the invention, the base asphalt is matched with the rubber particles, the aromatic oil, the microcrystalline wax, the silane coupling agent and the antioxidant to serve as functional aids, and meanwhile, the hybrid-based modified filler and the additive are added to serve as synergists, so that the base asphalt and the additive are coordinated to achieve a synergistic effect and jointly achieve a synergistic effect; the obtained modified asphalt product has harmonious improvement on elastic recovery, track dynamic stability and bending strain, and also has remarkable water resistance, ultraviolet resistance and cold and heat resistance stability effects.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt products, and in particular to a rubber modified asphalt product and a preparation method thereof. Background Art

[0002] The most common method of asphalt modification is to modify asphalt with rubber powder. Rubber powder modification mainly involves crushing waste tires into powder and then adding it to the base asphalt to improve the performance of asphalt. However, asphalt products prepared by existing modification technologies have poor elastic recovery performance, and the products also have poor rutting stability and bending strain. It is difficult for the products to achieve coordinated improvements in elastic recovery, rutting stability and bending strain. At the same time, they have poor water resistance, UV resistance, and cold and heat resistance, which further limits the use efficiency of the products. Based on this, the present invention further improves and processes them. Summary of the invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a rubber-modified asphalt product and a preparation method thereof to solve the problems raised in the above background technology.

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

[0005] The present invention provides a rubber modified asphalt product, comprising the following raw materials in parts by weight:

[0006] 55-60 parts of base asphalt, 15-20 parts of rubber particles, 12-14 parts of hybrid-based modified filler, 8-11 parts of aromatic oil, 5-8 parts of additives, 2-3 parts of microcrystalline wax, 2-3 parts of silane coupling agent, and 2-4 parts of antioxidant.

[0007] Preferably, the rubber modified asphalt product comprises the following raw materials in parts by weight:

[0008] 57.5 parts of base asphalt, 17.5 parts of rubber particles, 13 parts of hybrid-based modified filler, 10 parts of aromatic oil, 6.5 parts of additives, 2.5 parts of microcrystalline wax, 2.5 parts of silane coupling agent, and 3 parts of antioxidant.

[0009] Preferably, the rubber particles are natural rubber, chloroprene rubber or waste tire rubber powder, and the particle size of the rubber particles is 0.1-0.15 mm;

[0010] The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

[0011] Preferably, the preparation method of the hybrid-based modified filler is:

[0012] S01: preparing a 2-5% by mass yttrium nitrate solution and a 2-4% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution;

[0013] S02: 3-5 parts of carbon nanotubes and 1-2 parts of silane coupling agent KH550 are added to 5-8 parts of Tris-HCl buffer solution, and then 2-4 parts of talc additive solution are added and stirred to obtain carbon nanotube solution;

[0014] S03: Preparation of hybrid modifier:

[0015] S031: adding 3 to 5 parts of silicon carbide whiskers and 1 to 3 parts of nano-silica sol to 5 to 8 parts of lanthanum chloride solution, and then adding 2 to 4 parts of nano-titanium dioxide, stirring evenly to obtain a first hybridizing agent;

[0016] S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent;

[0017] S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier;

[0018] S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

[0019] Preferably, the pH value of the Tris-HCl buffer solution is 8.5-9.0; and the mass fraction of the lanthanum chloride solution is 2-5%.

[0020] Preferably, the ultrasonic treatment is performed at an ultrasonic power of 450 to 550 W and for 35 to 40 min.

[0021] Preferably, the preparation method of the additive is:

[0022] S11: preheating the hollow glass microspheres at 60-65° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing and drying;

[0023] S12: 2 to 5 parts of dried hollow glass microspheres and 10 to 15 parts of modified liquid are mixed and stirred, and after the stirring is completed, the mixture is filtered and dried to obtain an additive.

[0024] Preferably, the mixing and stirring process has a stirring speed of 550 to 650 r / min and the stirring time is 1 hour.

[0025] Preferably, the modified liquid comprises the following raw materials in parts by weight:

[0026] 2 to 5 parts of silicon micropowder, 1 to 3 parts of 4% by mass barium nitrate solution, 3 to 5 parts of boron nitride, 4 to 7 parts of 6% by mass sodium citrate solution and 1 to 2 parts of wood cellulose.

[0027] The present invention also provides a method for preparing a rubber modified asphalt product, comprising the following steps:

[0028] The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The rubber modified asphalt product of the present invention adopts base asphalt, rubber particles, aromatic oil, microcrystalline wax, silane coupling agent and antioxidant as functional additives, and hybrid modified fillers and additives are added as co-compounding agents. The two are coordinated and synergistic, and the obtained modified asphalt product has coordinated improvement of elastic recovery, rutting dynamic stability and bending strain, and has significant effects of water resistance, ultraviolet resistance and cold and heat stability. The hybrid modified filler adopts carbon nanotubes as a matrix, and is combined with silane coupling agent KH550, Tris-HCl buffer solution and talc additive liquid to prepare carbon nanotube liquid. The talc additive liquid is co-compounded and co-assisted by talcum powder, yttrium nitrate solution and urea solution. Through the coordination and reconciliation between the raw materials, the carbon nanotube body is co-compounded, the interface of the filler matrix is ​​optimized, thereby optimizing and improving the performance effect of the product, and the hybrid modifier is co-compounded to further improve the performance effect of the product. The hybrid modifier adopts the first hybrid The first hybrid agent and the second hybrid agent are ultrasonically intermodulated, the silicon carbide whiskers and nano-silica sol in the first hybrid agent are matched with nano-titanium dioxide and lanthanum chloride solution, and the whisker-like structure is matched with nano-titanium dioxide. At the same time, the glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are matched and assisted to form the second hybrid agent. The needle-like structure of the glass fiber is intermodulated with the whisker-like structure, so as to improve the system performance effect in a way of interlacing and matching with each other, and then the performance of the product is further improved; the additive is hollow glass microspheres that are preheated and then treated with an acid solution to optimize its activity effect. At the same time, the modified liquid is further improved and treated, the silicon micropowder and boron nitride in the modified liquid are blended, and then matched with barium nitrate solution, 6% by mass sodium citrate solution and wood cellulose. Through the mutual matching and coordination between the raw materials, the hollow glass microspheres improved by the modified liquid are further reinforced and coordinated with the hybrid modified filler, so that the performance of the product is further improved. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] A rubber-modified asphalt product of this embodiment includes the following raw materials in parts by weight:

[0033] 55-60 parts of base asphalt, 15-20 parts of rubber particles, 12-14 parts of hybrid-based modified filler, 8-11 parts of aromatic oil, 5-8 parts of additives, 2-3 parts of microcrystalline wax, 2-3 parts of silane coupling agent, and 2-4 parts of antioxidant.

[0034] The rubber modified asphalt product of this embodiment includes the following raw materials in parts by weight:

[0035] 57.5 parts of base asphalt, 17.5 parts of rubber particles, 13 parts of hybrid-based modified filler, 10 parts of aromatic oil, 6.5 parts of additives, 2.5 parts of microcrystalline wax, 2.5 parts of silane coupling agent, and 3 parts of antioxidant.

[0036] The rubber particles in this embodiment are natural rubber, chloroprene rubber or waste tire rubber powder, and the particle size of the rubber particles is 0.1-0.15mm;

[0037] The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

[0038] The preparation method of the hybrid modified filler of this embodiment is:

[0039] S01: preparing a 2-5% by mass yttrium nitrate solution and a 2-4% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution;

[0040] S02: 3-5 parts of carbon nanotubes and 1-2 parts of silane coupling agent KH550 are added to 5-8 parts of Tris-HCl buffer solution, and then 2-4 parts of talc additive solution are added and stirred to obtain carbon nanotube solution;

[0041] S03: Preparation of hybrid modifier:

[0042] S031: adding 3 to 5 parts of silicon carbide whiskers and 1 to 3 parts of nano-silica sol to 5 to 8 parts of lanthanum chloride solution, and then adding 2 to 4 parts of nano-titanium dioxide, stirring evenly to obtain a first hybridizing agent;

[0043] S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent;

[0044] S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier;

[0045] S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

[0046] The pH value of the Tris-HCl buffer solution of this embodiment is 8.5-9.0; the mass fraction of the lanthanum chloride solution is 2-5%.

[0047] The ultrasonic treatment in this embodiment has an ultrasonic power of 450 to 550 W and is carried out for 35 to 40 minutes.

[0048] The preparation method of the additive of this embodiment is:

[0049] S11: preheating the hollow glass microspheres at 60-65° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing and drying;

[0050] S12: 2 to 5 parts of dried hollow glass microspheres and 10 to 15 parts of modified liquid are mixed and stirred, and after the stirring is completed, the mixture is filtered and dried to obtain an additive.

[0051] The stirring speed of the blending and stirring process in this embodiment is 550-650 r / min, and the stirring is for 1 hour.

[0052] The modified solution of this embodiment includes the following raw materials in parts by weight:

[0053] 2 to 5 parts of silicon micropowder, 1 to 3 parts of 4% by mass barium nitrate solution, 3 to 5 parts of boron nitride, 4 to 7 parts of 6% by mass sodium citrate solution and 1 to 2 parts of wood cellulose.

[0054] A method for preparing a rubber-modified asphalt product of this embodiment comprises the following steps:

[0055] The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

[0056] Example 1.

[0057] A rubber-modified asphalt product of this embodiment includes the following raw materials in parts by weight:

[0058] 55 parts of base asphalt, 15 parts of rubber particles, 12 parts of hybrid-based modified filler, 8 parts of aromatic oil, 5 parts of additives, 2 parts of microcrystalline wax, 2 parts of silane coupling agent, and 2 parts of antioxidant.

[0059] The rubber particles in this embodiment are natural rubber, and the particle size of the rubber particles is 0.1 mm;

[0060] The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

[0061] The preparation method of the hybrid modified filler of this embodiment is:

[0062] S01: preparing a 2% by mass yttrium nitrate solution and a 2% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution;

[0063] S02: 3 parts of carbon nanotubes and 1 part of silane coupling agent KH550 are added to 5 parts of Tris-HCl buffer solution, and then 2 parts of talc additive solution are added and stirred to obtain carbon nanotube solution;

[0064] S03: Preparation of hybrid modifier:

[0065] S031: adding 3 parts of silicon carbide whiskers and 1 part of nano-silica sol to 5 parts of lanthanum chloride solution, and then adding 2 to 2 nano-titanium dioxide, stirring evenly to obtain a first hybridizing agent;

[0066] S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent;

[0067] S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier;

[0068] S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

[0069] The pH value of the Tris-HCl buffer solution in this embodiment is 8.5; the mass fraction of the lanthanum chloride solution is 2%.

[0070] The ultrasonic treatment in this embodiment has an ultrasonic power of 450 W and is carried out for 35 min.

[0071] The preparation method of the additive of this embodiment is:

[0072] S11: preheating the hollow glass microspheres at 60° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing with water and drying;

[0073] S12: 2 parts of dried hollow glass microspheres and 10 parts of modified liquid are mixed and stirred, and after the stirring is completed, the mixture is filtered and dried to obtain an additive.

[0074] The stirring speed of the blending and stirring process in this embodiment is 550 r / min, and the stirring is for 1 hour.

[0075] The modified solution of this embodiment includes the following raw materials in parts by weight:

[0076] 2 parts of silicon micropowder, 1 part of 4% by mass barium nitrate solution, 3 parts of boron nitride, 4 parts of 6% by mass sodium citrate solution and 1 part of wood cellulose.

[0077] A method for preparing a rubber-modified asphalt product of this embodiment comprises the following steps:

[0078] The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

[0079] Example 2.

[0080] A rubber-modified asphalt product of this embodiment includes the following raw materials in parts by weight:

[0081] 60 parts of base asphalt, 20 parts of rubber particles, 14 parts of hybrid-based modified filler, 11 parts of aromatic oil, 8 parts of additives, 3 parts of microcrystalline wax, 3 parts of silane coupling agent, and 4 parts of antioxidant.

[0082] The rubber particles in this embodiment are chloroprene rubber, and the particle size of the rubber particles is 0.15 mm;

[0083] The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

[0084] The preparation method of the hybrid modified filler of this embodiment is:

[0085] S01: preparing a 5% by mass yttrium nitrate solution and a 4% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution;

[0086] S02: 5 parts of carbon nanotubes and 2 parts of silane coupling agent KH550 are added to 8 parts of Tris-HCl buffer solution, and then 4 parts of talc additive solution are added and stirred to obtain carbon nanotube solution;

[0087] S03: Preparation of hybrid modifier:

[0088] S031: adding 5 parts of silicon carbide whiskers and 3 parts of nano-silica sol to 8 parts of lanthanum chloride solution, and then adding 4 parts of nano-titanium dioxide, stirring evenly to obtain a first hybrid agent;

[0089] S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent;

[0090] S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier;

[0091] S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

[0092] The pH value of the Tris-HCl buffer solution in this embodiment is 9.0; the mass fraction of the lanthanum chloride solution is 5%.

[0093] The ultrasonic treatment in this embodiment has an ultrasonic power of 550 W and is carried out for 40 min.

[0094] The preparation method of the additive of this embodiment is:

[0095] S11: preheating the hollow glass microspheres at 65° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing and drying;

[0096] S12: 5 parts of dried hollow glass microspheres and 15 parts of modified liquid are mixed and stirred, and after the stirring is completed, the mixture is filtered and dried to obtain an additive.

[0097] The stirring speed of the blending and stirring process in this embodiment is 650 r / min, and the stirring is for 1 hour.

[0098] The modified solution of this embodiment includes the following raw materials in parts by weight:

[0099] 5 parts of silicon micropowder, 3 parts of 4% by mass barium nitrate solution, 5 parts of boron nitride, 7 parts of 6% by mass sodium citrate solution and 2 parts of wood cellulose.

[0100] A method for preparing a rubber-modified asphalt product of this embodiment comprises the following steps:

[0101] The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

[0102] Example 3.

[0103] A rubber-modified asphalt product of this embodiment includes the following raw materials in parts by weight:

[0104] 57.5 parts of base asphalt, 17.5 parts of rubber particles, 13 parts of hybrid-based modified filler, 10 parts of aromatic oil, 6.5 parts of additives, 2.5 parts of microcrystalline wax, 2.5 parts of silane coupling agent, and 3 parts of antioxidant.

[0105] The rubber particles in this embodiment are natural rubber, chloroprene rubber or waste tire rubber powder, and the particle size of the rubber particles is 0.12 mm;

[0106] The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

[0107] The preparation method of the hybrid modified filler of this embodiment is:

[0108] S01: preparing a 3.5% by mass yttrium nitrate solution and a 3% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution;

[0109] S02: 4 parts of carbon nanotubes and 1.5 parts of silane coupling agent KH550 are added to 6.5 parts of Tris-HCl buffer solution, and then 3 parts of talc additive solution are added and stirred to obtain carbon nanotube solution;

[0110] S03: Preparation of hybrid modifier:

[0111] S031: adding 4 parts of silicon carbide whiskers and 2 parts of nano silica sol to 6.5 parts of lanthanum chloride solution, and then adding 3 parts of nano titanium dioxide, stirring evenly to obtain a first hybrid agent;

[0112] S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent;

[0113] S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier;

[0114] S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

[0115] The pH value of the Tris-HCl buffer solution in this embodiment is 8.8; the mass fraction of the lanthanum chloride solution is 3.5%.

[0116] The ultrasonic treatment in this embodiment was performed with an ultrasonic power of 475 W and for 37.5 min.

[0117] The preparation method of the additive of this embodiment is:

[0118] S11: preheating the hollow glass microspheres at 62.5° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing with water and drying;

[0119] S12: 3.5 parts of dried hollow glass microspheres and 12.5 parts of modified liquid are mixed and stirred, and after stirring, the mixture is filtered and dried to obtain an additive.

[0120] The stirring speed of the blending and stirring process in this embodiment is 600 r / min, and the stirring is for 1 hour.

[0121] The modified solution of this embodiment includes the following raw materials in parts by weight:

[0122] 3.5 parts of silicon micropowder, 2 parts of 4% by mass barium nitrate solution, 4 parts of boron nitride, 5.5 parts of 6% by mass sodium citrate solution and 1-2 parts of wood cellulose.

[0123] A method for preparing a rubber-modified asphalt product of this embodiment comprises the following steps:

[0124] The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

[0125] Comparative Example 1.

[0126] The difference from Example 3 is that no hybrid-based modified filler is added.

[0127] Comparative Example 2.

[0128] The difference from Example 3 is that no carbon nanotube liquid is added in the preparation of the hybrid modified filler.

[0129] Comparative Example 3.

[0130] The difference from Example 3 is that no talc additive liquid is added to the carbon nanotube liquid.

[0131] Comparative Example 4.

[0132] The difference from Example 3 is that the talc additive liquid is directly replaced by talcum powder.

[0133] Comparative Example 5.

[0134] The difference from Example 3 is that no carbon nanotubes or silane coupling agent KH550 are added to the carbon nanotube liquid.

[0135] Comparative Example 6.

[0136] The difference from Example 3 is that no hybrid modifier is added in the preparation of the hybrid modified filler.

[0137] Comparative Example 7.

[0138] The difference from Example 3 is that the first hybridizing agent is not added in the preparation of the hybrid modifier.

[0139] Comparative Example 8.

[0140] The difference from Example 3 is that silicon carbide whiskers and nano-titanium dioxide are not added to the first hybridizing agent.

[0141] Comparative Example 9.

[0142] The difference from Example 3 is that no second hybridizing agent is added in the preparation of the hybrid modifier.

[0143] Comparative Example 10.

[0144] The difference from Example 3 is that glass fiber and sodium lignin sulfonate are not added into the second hybridizing agent.

[0145] Comparative Example 11.

[0146] The difference from Example 3 is that no additives were added.

[0147] Comparative Example 12.

[0148] The difference from Example 3 is that no modifying liquid treatment is used in the additive.

[0149] The products of Examples 1 to 3 and Comparative Examples 1 to 12 were subjected to conventional performance tests. The products were immersed in 65°C water for 10 hours and then heated at 1000w / cm 2 The product was irradiated with ultraviolet intensity for 5 days, and finally treated at 70℃ for 12 hours, and then placed at -5℃ for 12 hours. The above is one cycle. The cycle was repeated 5 times to test the product's water resistance, ultraviolet resistance, and cold and heat resistance stability. The test results are as follows;

[0150]

[0151]

[0152] It can be seen from Comparative Examples 1 to 12 and Examples 1 to 3 that;

[0153] The product of Example 3 has excellent rutting dynamic stability, and at the same time, excellent low-temperature bending failure strain and elastic recovery performance, and the three can be improved in a coordinated manner. In addition, the product has excellent performance stability under water resistance, UV resistance, and cold and hot conditions, and the product can achieve integrated coordinated improvement;

[0154] From Comparative Examples 1 to 12 and Example 3, it can be seen that the performance of the product is significantly deteriorated when no hybrid modified filler or additive is added to the product. The performance effect of the product is most significant when the two are coordinated and work together.

[0155] In the preparation of the hybrid modified filler, no carbon nanotube liquid was added, no talc additive liquid was added to the carbon nanotube liquid, the talc additive liquid was directly replaced by talcum powder, and no carbon nanotubes or silane coupling agent KH550 were added to the carbon nanotube liquid. The performance of the product showed a trend of deterioration to varying degrees. The carbon nanotube liquid obtained by the specific method of the present invention had the most significant product performance effect.

[0156] The hybrid modified filler based on hybridization is prepared without adding a hybrid modifier, the hybrid modifier is prepared without adding a first hybrid agent, the first hybrid agent is not added with silicon carbide whiskers and nano-titanium dioxide, the hybrid modifier is prepared without adding a second hybrid agent, and the second hybrid agent is not added with glass fiber and sodium lignin sulfonate. The performance of the product has a tendency to deteriorate to varying degrees. The hybrid modified filler based on hybridization obtained by using the first hybrid agent and the second hybrid agent obtained by the specific method of the present invention and a hybrid modifier prepared by combining with a specific carbon nanotube liquid has the most significant performance effect of the product. Other methods are not as obvious as the effect of the present invention; and the additive is not treated with a modifying liquid, and the performance of the product also shows a relatively obvious tendency to deteriorate.

[0157] The present invention further explores the product performance through the modified liquid;

[0158] Experimental example 1.

[0159] The same as Example 3, the only difference is that no silicon powder is added to the modified liquid.

[0160] Experimental example 2.

[0161] The same as Example 3, except that no boron nitride is added to the modified solution.

[0162] Experimental Example 3.

[0163] The same as Example 3, the only difference is that no barium nitrate solution is added to the modified solution.

[0164] Experimental Example 4.

[0165] The same as Example 3, except that no lignocellulose is added to the modified liquid.

[0166] Experimental Example 5.

[0167] The same as Example 3, the only difference is that no sodium citrate solution is added to the modified liquid.

[0168] The performance tests of Experimental Examples 1 to 5 are as follows:

[0169]

[0170]

[0171] It can be seen from Experimental Examples 1 to 5 that boron nitride was not added to the modified liquid. Among the factors in the preparation of the modified liquid, the product performance deteriorated most significantly, followed by the fact that silicon micropowder and cellulose were not added. At the same time, barium nitrate solution and cellulose were not added to the modified liquid. The performance of the product showed a trend of deterioration. Only the modified liquid prepared by the method of the present invention had the most significant product performance effect. In the preparation of the modified liquid, all raw materials are indispensable. Only the specific raw material ratio of the present invention is used. Using other raw material ratios is not as significant as the effect of the present invention.

[0172] 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 present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0173] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rubber modified asphalt product, characterized in that: It includes the following raw materials in parts by weight: 55-60 parts of base asphalt, 15-20 parts of rubber particles, 12-14 parts of hybrid-based modified filler, 8-11 parts of aromatic oil, 5-8 parts of additives, 2-3 parts of microcrystalline wax, 2-3 parts of silane coupling agent, and 2-4 parts of antioxidant.

2. A rubber-modified asphalt product according to claim 1, characterized in that: The rubber modified asphalt product comprises the following raw materials in parts by weight: 57.5 parts of base asphalt, 17.5 parts of rubber particles, 13 parts of hybrid-based modified filler, 10 parts of aromatic oil, 6.5 parts of additives, 2.5 parts of microcrystalline wax, 2.5 parts of silane coupling agent, and 3 parts of antioxidant.

3. The rubber-modified asphalt product according to claim 1, characterized in that: The rubber particles are natural rubber, chloroprene rubber or waste tire rubber powder, and the particle size of the rubber particles is 0.1-0.15mm; The kinematic viscosity of aromatic oil at 100°C is 36.13 mm 2 / s, moisture content 0.06%, density 0.9511g / cm 3 ; The silane coupling agent is silane coupling agent KH560; and the antioxidant is antioxidant 1010.

4. The rubber-modified asphalt product according to claim 1, characterized in that: The preparation method of the hybrid modified filler is: S01: preparing a 2-5% by mass yttrium nitrate solution and a 2-4% by mass urea solution; then mixing the talc powder, the yttrium nitrate solution and the urea solution in a weight ratio of 3:5:1 to obtain a talc additive solution; S02: 3-5 parts of carbon nanotubes and 1-2 parts of silane coupling agent KH550 are added to 5-8 parts of Tris-HCl buffer solution, and then 2-4 parts of talc additive solution are added and stirred to obtain carbon nanotube solution; S03: Preparation of hybrid modifier: S031: adding 3 to 5 parts of silicon carbide whiskers and 1 to 3 parts of nano-silica sol to 5 to 8 parts of lanthanum chloride solution, and then adding 2 to 4 parts of nano-titanium dioxide, stirring evenly to obtain a first hybridizing agent; S032: glass fiber, 5% by mass sodium silicate solution and sodium lignin sulfonate are mixed in a weight ratio of 4:7:1 to obtain a second hybridizing agent; S031: ultrasonically treat the first hybridizing agent and the second hybridizing agent in a weight ratio of 7:5, filter and dry after the ultrasonic treatment to obtain a hybrid modifier; S04: The hybrid modifier and carbon nanotube liquid are mixed in a weight ratio of 3:5 and ball-milled at a ball-milling speed of 1500 r / min for 1 h. After the ball-milling is completed, the mixture is filtered and dried to obtain a hybrid-based modified filler.

5. A rubber modified asphalt product according to claim 4, characterized in that: The pH value of the Tris-HCl buffer solution is 8.5-9.0; the mass fraction of the lanthanum chloride solution is 2-5%.

6. A rubber-modified asphalt product according to claim 4, characterized in that: The ultrasonic treatment is performed with an ultrasonic power of 450 to 550 W and the ultrasonic treatment lasts for 35 to 40 minutes.

7. The rubber-modified asphalt product according to claim 1, characterized in that: The preparation method of the additive is: S11: preheating the hollow glass microspheres at 60-65° C. for 1 h, then stirring the preheated hollow glass microspheres in a sufficient amount of 5% by mass sulfuric acid solution, and then washing and drying; S12: 2 to 5 parts of dried hollow glass microspheres and 10 to 15 parts of modified liquid are mixed and stirred, and after the stirring is completed, the mixture is filtered and dried to obtain an additive.

8. The rubber-modified asphalt product according to claim 7, characterized in that: The mixing and stirring process is carried out at a stirring speed of 550-650 r / min and the stirring is carried out for 1 hour.

9. The rubber-modified asphalt product according to claim 7, characterized in that: The modified liquid comprises the following raw materials in parts by weight: 2 to 5 parts of silicon micropowder, 1 to 3 parts of 4% by mass barium nitrate solution, 3 to 5 parts of boron nitride, 4 to 7 parts of 6% by mass sodium citrate solution and 1 to 2 parts of wood cellulose.

10. The method for preparing a rubber modified asphalt product according to any one of claims 1 to 9, characterized in that: The following steps are involved: The base asphalt is heated and melted, and then rubber particles and aromatic oil are added, followed by hybrid-based modified fillers, additives, microcrystalline wax, silane coupling agents and antioxidants, and stirred thoroughly to obtain the rubber-modified asphalt product of the present invention.

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