High-strength asphalt-based pavement material and preparation method and application thereof

Abstract

The application relates to the technical field of pavement materials, and particularly discloses a high-strength asphalt-based pavement material and a preparation method and application thereof. The high-strength asphalt-based pavement material comprises the following raw material components in mass fractions: waste rubber powder 60-80 parts, base asphalt 20-50 parts, sodium lignosulfonate modified petroleum resin 10-20 parts, deacidified waste oil 5-15 parts and solid filler 20-30 parts; wherein the raw material components of the solid filler comprise furan resin glass fiber reinforced material, cement kiln dust, blast furnace slag and coal gangue powder. The high-strength asphalt-based pavement material provided by the application has excellent road performance, can maintain good stability at low temperatures, is not prone to cracking, the raw material components are cheap and easy to obtain, the preparation cost is low, and the treatment pressure of solid waste can be effectively relieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pavement materials, and in particular to a high-strength asphalt-based pavement material and a preparation method and application thereof. Background Art

[0002] The service performance of road infrastructure directly impacts transport efficiency and traffic safety. Statistics show that in recent years, my country's road freight volume has grown by an average of 6.5% annually, with the proportion of heavy-loaded vehicles exceeding 30%. Traditional pavement materials (such as ordinary cement concrete and matrix asphalt mixtures) suffer from insufficient strength and poor durability, leading to widespread premature cracking, rutting, and potholes. Their average service life is only 60%-70% of their design value. This inadequate performance has become a key bottleneck restricting the sustainable development of road projects. High-strength pavement materials, through optimized material composition, innovative structural design, and improved preparation processes, have significantly improved key pavement properties such as compression, flexural, rutting, and fatigue resistance, becoming a core technology for modern road engineering upgrades. High-strength pavement materials primarily include cement-based and asphalt-based technology systems, and have achieved significant success in projects such as heavy-duty roads, airport runways, and bridge decks in cold regions.

[0003] Existing high-strength asphalt-based pavement materials typically utilize a hard asphalt and ground-petroleum-stone ratio to achieve a dense skeleton structure. This increases the pavement's low-temperature brittleness and prone to cracking, making it unsuitable for winter use in cold regions. Furthermore, the thin asphalt film and high mineral powder content of existing high-strength asphalt-based pavement materials result in poor aging resistance. UV exposure and oxidation can cause the asphalt to harden, leading to cracking and shortening the pavement's service life. Furthermore, existing high-strength asphalt-based pavement materials often incorporate modifiers and additives, resulting in high material costs and poor economic benefits.

[0004] Based on this, it is of great practical significance to develop a high-strength asphalt-based pavement material with high economic benefits, excellent anti-aging performance and stable performance even at low temperatures. Summary of the Invention

[0005] In view of this, the present invention provides a high-strength asphalt-based pavement material, a preparation method thereof, and an application thereof. The raw materials of the high-strength asphalt-based pavement material include waste rubber powder, matrix asphalt, sodium lignin sulfonate modified petroleum resin, deacidified waste grease, and solid filler; wherein, the raw material components of the solid filler include furan resin glass fiber reinforcement material, cement kiln dust, blast furnace slag, and coal gangue powder. The present invention utilizes the synergistic effect of each raw material component, combined with a specific preparation method, so that the high-strength asphalt-based pavement material has excellent road performance. Moreover, the high-strength asphalt-based pavement material can maintain good stability even at low temperatures and is not easy to crack; the raw material components are cheap and easy to obtain, the preparation cost is low, and it can also effectively alleviate the pressure of solid waste treatment.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] A first aspect of the present invention provides a high-strength asphalt-based pavement material, comprising the following raw material components by weight: 60-80 parts of waste rubber powder, 20-50 parts of base asphalt, 10-20 parts of sodium lignin sulfonate-modified petroleum resin, 5-15 parts of deacidified waste oil and fat, and 20-30 parts of solid filler;

[0008] The raw material components of the solid filler include furan resin glass fiber reinforcement material, cement kiln dust, blast furnace slag and coal gangue powder.

[0009] Compared to existing technologies, this invention produces a high-strength asphalt-based pavement material using waste rubber powder, base asphalt, sodium lignin sulfonate-modified petroleum resin, deacidified waste grease, and solid fillers as its primary raw materials. The waste rubber powder, through swelling and adsorption, forms an elastic reinforcing phase, improving the asphalt's temperature sensitivity and addressing the base asphalt's inherent rutting at high temperatures and brittle cracking at low temperatures. The two complement each other, effectively improving the pavement material's high- and low-temperature performance and durability.

[0010] The addition of sodium ligninsulfonate-modified petroleum resin can enhance the pavement material's resistance to deformation. The aromatic ring structure of the petroleum resin provides a certain degree of rigidity, while the long-chain molecules of sodium ligninsulfonate, through bridging, ensure the adhesion between asphalt and other components, improving the pavement material's resistance to spalling. Furthermore, sodium ligninsulfonate-modified petroleum resin can slow the rapid absorption of light oil by waste rubber powder, preventing abnormal viscosity of the pavement material caused by excessive swelling of the waste rubber powder and maintaining stable performance. Furthermore, the phenolic hydroxyl groups in sodium ligninsulfonate synergistically with the carbon black component in the rubber powder can slow the aging of asphalt-based pavement materials and extend their service life.

[0011] The core cause of asphalt aging is oil volatilization and oxidation, which leads to increased asphaltene content and an imbalance in the colloidal structure. Deacidified waste grease contains a large amount of long-chain fatty acid esters and unsaturated fatty acids, which have a similar structure to the light oil in asphalt. They can replenish the light components lost during aging, thereby delaying the hardening and aging of asphalt materials. Furthermore, the long-chain fatty acid esters in deacidified waste grease can reduce direct UV damage to asphalt molecular chains, allowing for the incorporation of photo-oxidative aging-resistant components, further enhancing the aging resistance of asphalt-based pavement materials. Furthermore, deacidified waste grease can improve asphalt fluidity, lower mixing temperatures, and reduce energy consumption and thermal aging.

[0012] The fillers of the high-strength asphalt-based pavement material of the present invention include furan resin glass fiber reinforcement, cement kiln dust, blast furnace slag and coal gangue powder. Among them, the addition of furan resin glass fiber reinforcement gives the pavement material a high-strength skeleton support, inhibits the relative slippage of aggregate particles, significantly improves the compressive, flexural and shear strength of the pavement material, and effectively resists rutting deformation under heavy traffic. Cement kiln dust has volcanic ash activity and water hardness. Compared with traditional mineral powder, it is easier to form a high-viscosity mortar with the matrix asphalt, improves the adhesion between asphalt and solid fillers, and at the same time, due to its fine particles, it can fill the gaps in the pavement material, improving the density and impermeability. Blast furnace slag and coal gangue powder have high strength, and together with cement kiln dust, they form particle grading of different particle sizes, which improves the density of pavement materials. Moreover, blast furnace slag has high activity and micro-aggregate effect, and has significant advantages in improving pavement strength and durability. It works synergistically with coal gangue powder and cement kiln dust to effectively improve the strength and rutting resistance of asphalt-based pavement materials. Moreover, all three are solid wastes, which greatly reduces the cost of raw materials, while maximizing the utilization of solid waste and alleviating the pressure of solid waste treatment.

[0013] Preferably, the acid value of the deacidified waste oil is 2-6 mgKOH / g.

[0014] Preferably, the matrix asphalt is No. 90 matrix asphalt.

[0015] Preferably, the method for preparing deacidified waste oil and fat comprises the following steps:

[0016] S1. Grinding nut shells, mixing with activated carbon, sintering, acidifying, and drying to obtain activated carbon material;

[0017] S2, dispersing chitosan and the activated carbon material in deionized water, adding an initiator, carrying out a grafting reaction under an inert atmosphere, separating the solid and the liquid, and drying to obtain an active carrier;

[0018] S3, dispersing the active carrier in an alkaline solution, mixing at 40-50° C., solid-liquid separation, and drying to obtain a solid deacidified material;

[0019] S4. Evenly mix the solid deacidified material with the kitchen waste grease, perform deacidification treatment at 100-120° C., centrifuge, and wash to obtain deacidified waste grease.

[0020] The long-chain fatty acid esters in deacidified waste oils and fats can fill the gaps between asphalt molecules, reduce high-temperature viscosity, and improve the high-temperature rutting resistance of asphalt-based pavement materials; while the flexible ester-based segments can alleviate the low-temperature brittleness of asphalt and reduce the shrinkage cracks in asphalt-based pavement materials.

[0021] Further preferably, in step S1, the nut shell is any one or more of macadamia nut shell, cashew nut shell or pistachio nut shell.

[0022] Further preferably, in step S1, the mass ratio of the nut shell to the activated carbon is 2:1-4:1.

[0023] Further preferably, in step S1, the sintering temperature is 300-400° C., and the sintering time is 2-4 hours.

[0024] Further preferably, in step S1, the acidification adopts a strong acid solution with a concentration of 0.5-1 mol / L.

[0025] Further preferably, in step S2, the mass ratio of the chitosan, the activated carbon material and the initiator is 0.3:1:0.1-0.5:1:0.1.

[0026] Further preferably, in step S2, the initiator is potassium persulfate.

[0027] More preferably, in step S2, the temperature of the grafting reaction is 70-90° C., and the time of the grafting reaction is 6-8 hours.

[0028] Further preferably, in step S2, the mass volume ratio of the chitosan to the deionized water is 1 g:10 mL-1 g:15 mL.

[0029] Further preferably, in step S3, the mass volume ratio of the active carrier to the alkaline solution is 1 g:5 mL-1 g:8 mL.

[0030] More preferably, in step S3, the alkaline solution is a sodium hydroxide solution or a potassium hydroxide solution with a concentration of 0.5-1 mol / L.

[0031] Further preferably, in step S3, the mixing treatment time is 30-50 minutes.

[0032] Further preferably, in step S4, the mass ratio of the solid deacidification material to the waste cooking oil is 0.2:1-0.4:1.

[0033] Further preferably, in step S4, the deacidification treatment time is 30-40 minutes.

[0034] Further preferably, in step S4, the centrifugal speed is 500-700 rpm, and the centrifugal time is 5-10 min.

[0035] Preferably, the preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0036] Step a, dissolving petroleum resin in toluene and subjecting to microwave treatment to obtain a petroleum resin solution;

[0037] Step b: dispersing sodium lignin sulfonate in an alcohol solution, mixing the mixture with the petroleum resin solution, adding an initiator, carrying out a free radical reaction at 50-60° C. under an inert atmosphere, and performing solid-liquid separation to obtain the sodium lignin sulfonate modified petroleum resin.

[0038] Further preferably, in step a, the mass volume ratio of the petroleum resin to toluene is 1 g:5 mL-1 g:8 mL.

[0039] Further preferably, in step a, the frequency of the microwave treatment is 300-400W, and the microwave treatment time is 3-5 min.

[0040] Further preferably, in step a, the petroleum resin is C5 petroleum resin or C9 petroleum resin.

[0041] Further preferably, in step b, the mass volume ratio of the sodium lignin sulfonate to the alcohol solution is 1 g:4 mL-1 g:6 mL.

[0042] Further preferably, in step b, the alcohol solution is an ethanol solution with a mass concentration of 40%-50%.

[0043] Further preferably, in step b, the mass ratio of the sodium lignin sulfonate to the petroleum resin is 0.1:1-0.2:1.

[0044] Further preferably, in step b, the amount of the initiator added is 0.2%-0.4% of the mass of the petroleum resin solution.

[0045] Further preferably, in step b, the initiator is dibenzoyl peroxide.

[0046] Further preferably, in step b, the free radical reaction time is 8-12 hours.

[0047] As an amphoteric surfactant, sodium lignin sulfonate can reduce the interfacial tension between petroleum resin and matrix asphalt, promote the uniform dispersion of resin in asphalt, form a stable "asphalt-resin-lignin" ternary system, and thus improve the stability of pavement materials.

[0048] Preferably, the solid filler comprises the following raw material components in percentage by mass: 15%-25% furan resin glass fiber reinforcement material, 15%-25% cement kiln dust, 10%-30% blast furnace slag and the balance coal gangue powder.

[0049] Furan resin-glass fiber reinforcement combines the high toughness of glass fiber with the adhesive properties of furan resin. The synergistic effect of these two can reduce microcracks in pavement materials, as well as the occurrence of low-temperature shrinkage cracks and reflective cracks. The active ingredients in cement kiln dust form crosslinks with the colloids in asphalt, slowing the oxidation and hardening of asphalt and improving the aging resistance of the pavement material. Blast furnace slag improves the density, strength, and impermeability of pavement materials. The addition of coal gangue powder inhibits aggregate slippage, improving the dynamic stability of asphalt-based pavement materials. It also offers good construction adaptability and ease of operation.

[0050] More preferably, the particle size of the cement kiln dust is 10-50 μm.

[0051] Further preferably, the blast furnace slag comprises the following chemical components in percentage by mass: SiO2: 32%-37%, Al2O3: 22-29%, CaO: 30%-35%, MgO: 4%-6% and Fe2O3: 5%-7%.

[0052] More preferably, the particle size of the blast furnace slag is 10-200 μm.

[0053] Further preferably, the particle size of the coal gangue powder is 80-120 μm.

[0054] The present invention limits the particle sizes of the three solid wastes in the solid filler to form a gradient gradation, thereby effectively improving the density of the asphalt-based pavement material and further enhancing its strength, anti-rutting performance and anti-permeability.

[0055] Further preferably, the furan resin glass fiber reinforced material includes the following raw material components in percentage by mass: furan resin 10%-20%, glass fiber 50%-65%, fluorocarbon resin 5%-10%, nano-silica 5%-10% and paraffin oil 3%-7%.

[0056] Further preferably, the preparation method of the furan resin glass fiber reinforced material includes the following steps: weighing the raw material components except the glass fiber according to the designed ratio, mixing them evenly at 40-60°C to obtain a liquid reinforcing agent; soaking the glass fiber in the liquid reinforcing agent, separating the solid and the liquid, and drying to obtain the furan resin glass fiber reinforced material.

[0057] More preferably, the length of the glass fiber is 0.3-0.8 mm.

[0058] More preferably, the particle size of the nano-silica is 100-200 nm.

[0059] The second aspect of the present invention provides a method for preparing the high-strength asphalt-based pavement material, comprising the following steps: weighing base asphalt and deacidified waste grease according to the designed ratio, mixing them evenly at 120-140°C to obtain component A; weighing waste rubber powder, sodium lignin sulfonate-modified petroleum resin and solid filler according to the designed ratio, mixing them evenly to obtain component B; heating the component A to 150-160°C, adding the component B, shearing and mixing, and obtaining the high-strength asphalt-based pavement material.

[0060] Preferably, the shear mixing speed is 4000-5500 rpm.

[0061] Preferably, the shear mixing time is 8-12 minutes.

[0062] The third aspect of the present invention provides the use of the high-strength asphalt-based pavement material in road engineering construction.

[0063] The present invention uses waste rubber powder, matrix asphalt, sodium lignin sulfonate modified petroleum resin, deacidified waste grease and solid filler as main raw materials to produce a high-strength asphalt-based pavement material. The high-strength asphalt-based pavement material has excellent road performance and aging resistance, is not easy to crack at low temperatures, has low preparation cost and simple preparation process, and effectively solves the problems of existing asphalt-based pavement materials such as high brittleness at low temperatures, easy cracking, poor aging resistance and low economic benefits. DETAILED DESCRIPTION

[0064] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0065] The specific preparation methods of the furan resin glass fiber reinforced materials described in the following examples and comparative examples include the following contents:

[0066] The furan resin glass fiber reinforced material includes the following raw material components in percentage by mass: 15% furan resin, 60% glass fiber, 8% fluorocarbon resin, 10% nano-silicon dioxide with a particle size of 150 nm, and 7% paraffin oil.

[0067] The preparation method of the furan resin glass fiber reinforced material comprises the following steps: weighing all raw material components except glass fiber according to the designed ratio, stirring at 50°C and 300 rpm to mix evenly to obtain a liquid reinforcing agent; soaking short glass fibers with a length of 0.5 mm in the liquid reinforcing agent, separating the solid and the liquid, and drying to obtain the furan resin glass fiber reinforced material.

[0068] The blast furnace slag in the following examples and comparative examples includes the following chemical components in percentage by mass: SiO2: 34.2%, Al2O3: 23.4%, CaO: 33.8%, MgO: 4.6% and Fe2O3: 4.0%; the particle size of the blast furnace slag is 10-200 μm.

[0069] Example 1

[0070] This embodiment provides a high-strength asphalt-based pavement material and a preparation method thereof, which specifically includes the following contents:

[0071] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 70 parts of waste rubber powder, 35 parts of No. 90 base asphalt, 12 parts of sodium lignin sulfonate modified petroleum resin, 10 parts of deacidified waste grease and 25 parts of solid filler; wherein the solid filler includes the following raw material components in percentage by mass: 22% of furan resin glass fiber reinforcement material, 25% of cement kiln dust with a particle size of 30 μm, 20% of blast furnace slag and the balance of coal gangue powder with a particle size of 100 μm.

[0072] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0073] Step 1: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 130°C to obtain component A;

[0074] Step 2: Weigh waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler according to the designed ratio to obtain component B;

[0075] Step 3: Heat the component A to 155° C., add the component B, and shear and mix at a rotation speed of 5000 rpm for 10 minutes to obtain the high-strength asphalt-based pavement material.

[0076] The preparation method of the deacidified waste grease comprises the following contents:

[0077] S1. 300 g macadamia nut shells were crushed and mixed evenly with 100 g activated carbon. The mixture was heated to 350° C. and sintered for 3 h. The sintered product was acidified with a 0.8 mol / L sulfuric acid solution for 8 min. The solid-liquid separation was performed and the product was dried to obtain an activated carbon material.

[0078] S2. 150 g of chitosan and the activated carbon material were evenly mixed and dispersed in 1500 mL of deionized water. 32 g of potassium persulfate was added. Under an inert atmosphere, the system was heated to 80° C. for grafting reaction for 7 h. The solid-liquid separation was performed and the mixture was dried to obtain an active carrier.

[0079] S3, dispersing the active carrier in 2300 mL of a 0.6 mol / L potassium hydroxide solution, mixing the mixture at 45° C. for 40 min, separating the solid and the liquid, and drying the mixture to obtain a solid deacidified material;

[0080] S4. The solid deacidified material was evenly mixed with 1.5 kg of waste cooking oil, and the mixture was deacidified at 108° C. for 35 min. The mixture was centrifuged at 600 rpm for 6 min, the supernatant was discarded, and the centrifuged product was washed with deionized water until neutral to obtain deacidified waste oil with an acid value of 4 mgKOH / g.

[0081] The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0082] Step a, dissolving 200 g of C9 petroleum resin in 1500 mL of toluene, and subjecting the mixture to microwave treatment at a microwave power of 300 W for 5 min to obtain a petroleum resin solution;

[0083] Step b, dissolving 20g of sodium lignin sulfonate in 100mL of 45% mass concentration ethanol solution, mixing with the petroleum resin solution, adding 4g of dibenzoyl peroxide, and conducting a free radical reaction at 55°C under an inert atmosphere for 10h, solid-liquid separation, to obtain sodium lignin sulfonate modified petroleum resin.

[0084] Example 2

[0085] This embodiment provides a high-strength asphalt-based pavement material and a preparation method thereof, which specifically includes the following contents:

[0086] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 60 parts of waste rubber powder, 50 parts of No. 90 base asphalt, 15 parts of sodium lignin sulfonate modified petroleum resin, 8 parts of deacidified waste grease and 22 parts of solid filler; wherein the solid filler includes the following raw material components in parts by mass: 25% of furan resin glass fiber reinforcement material, 20% of cement kiln dust with a particle size of 30 μm, 30% of blast furnace slag and the remainder of coal gangue powder with a particle size of 100 μm.

[0087] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0088] Step 1: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 130°C to obtain component A;

[0089] Step 2: Weigh waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler according to the designed ratio to obtain component B;

[0090] Step 3: Heat the component A to 150° C., add the component B, and shear and mix at a rotation speed of 5500 rpm for 8 minutes to obtain the high-strength asphalt-based pavement material.

[0091] The preparation method of the deacidified waste grease comprises the following contents:

[0092] S1. Crush 310 g macadamia nut shells, mix them evenly with 100 g activated carbon, heat to 350 ° C and sinter for 3 h, acidify the sintered material with 0.5 mol / L sulfuric acid solution for 10 min, separate the solid and liquid, and dry to obtain an activated carbon material;

[0093] S2. 150 g of chitosan and the activated carbon material were evenly mixed and dispersed in 1500 mL of deionized water. 32 g of potassium persulfate was added. Under an inert atmosphere, the system was heated to 80° C. for grafting reaction for 7 h. The solid-liquid separation was performed and the mixture was dried to obtain an active carrier.

[0094] S3, dispersing the active carrier in 2300 mL of a 0.6 mol / L potassium hydroxide solution, mixing the mixture at 45° C. for 40 min, separating the solid and the liquid, and drying the mixture to obtain a solid deacidified material;

[0095] S4. The solid deacidified material was evenly mixed with 1.5 kg of waste cooking oil, and the mixture was deacidified at 108° C. for 35 min. The mixture was centrifuged at 600 rpm for 6 min, the supernatant was discarded, and the centrifuged product was washed with deionized water until neutral to obtain deacidified waste oil with an acid value of 5 mgKOH / g.

[0096] The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0097] Step a, dissolving 200 g of C9 petroleum resin in 1500 mL of toluene, and subjecting the mixture to microwave treatment at a microwave power of 300 W for 5 min to obtain a petroleum resin solution;

[0098] Step b: dissolving 20 g of sodium lignin sulfonate in 120 mL of 40% ethanol solution, mixing the mixture with the petroleum resin solution, adding 4 g of dibenzoyl peroxide, and carrying out a free radical reaction at 55 ° C. under an inert atmosphere for 10 h, and separating the solid and liquid to obtain sodium lignin sulfonate modified petroleum resin.

[0099] Example 3

[0100] This embodiment provides a high-strength asphalt-based pavement material and a preparation method thereof, which specifically includes the following contents:

[0101] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 80 parts of waste rubber powder, 22 parts of No. 90 base asphalt, 18 parts of sodium lignin sulfonate modified petroleum resin, 12 parts of deacidified waste grease and 27 parts of solid filler; wherein the solid filler includes the following raw material components in the following mass percentages: 22% of furan resin glass fiber reinforcement material, 25% of cement kiln dust with a particle size of 30 μm, 20% of blast furnace slag and the balance of coal gangue powder with a particle size of 100 μm.

[0102] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0103] Step 1: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 130°C to obtain component A;

[0104] Step 2: Weigh waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler according to the designed ratio to obtain component B;

[0105] Step 3: Heat the component A to 155° C., add the component B, and shear and mix at a rotation speed of 4800 rpm for 12 minutes to obtain the high-strength asphalt-based pavement material.

[0106] The preparation method of the deacidified waste grease comprises the following contents:

[0107] S1. Crush 280g of macadamia nut shells, mix them evenly with 100g of activated carbon, heat to 350°C and sinter for 3h, acidify the sintered material with 0.8mol / L sulfuric acid solution for 10min, separate the solid and liquid, and dry to obtain an activated carbon material;

[0108] S2. 150 g of chitosan and the activated carbon material were evenly mixed and dispersed in 1500 mL of deionized water. 32 g of potassium persulfate was added. Under an inert atmosphere, the system was heated to 80° C. for grafting reaction for 7 h. The solid-liquid separation was performed and the mixture was dried to obtain an active carrier.

[0109] S3, dispersing the active carrier in 2300 mL of a 0.6 mol / L potassium hydroxide solution, mixing the mixture at 45° C. for 40 min, separating the solid and the liquid, and drying the mixture to obtain a solid deacidified material;

[0110] S4. The solid deacidified material was evenly mixed with 1.5 kg of waste cooking oil, and the mixture was deacidified at 108° C. for 35 min. The mixture was centrifuged at 600 rpm for 6 min, the supernatant was discarded, and the centrifuged product was washed with deionized water until neutral to obtain deacidified waste oil with an acid value of 6 mgKOH / g.

[0111] The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0112] Step a, dissolving 200 g of C9 petroleum resin in 1500 mL of toluene, and subjecting the mixture to microwave treatment at a microwave power of 350 W for 3 min to obtain a petroleum resin solution;

[0113] Step b, dissolving 20g of sodium lignin sulfonate in 100mL of 45% mass concentration ethanol solution, mixing with the petroleum resin solution, adding 4g of dibenzoyl peroxide, and conducting a free radical reaction at 55°C under an inert atmosphere for 10h, solid-liquid separation, to obtain sodium lignin sulfonate modified petroleum resin.

[0114] Comparative Example 1

[0115] This comparative example provides a high-strength asphalt-based pavement material and a preparation method thereof. The difference from Example 1 is that the sodium lignin sulfonate-modified petroleum resin is replaced with an equal amount of petroleum resin. Specifically, the following contents are included:

[0116] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 70 parts of waste rubber powder, 35 parts of No. 90 base asphalt, 12 parts of petroleum resin, 10 parts of deacidified waste grease and 25 parts of solid filler; wherein the solid filler includes the following raw material components in the following mass percentages: 22% of furan resin glass fiber reinforcement material, 25% of cement kiln dust with a particle size of 30 μm, 20% of blast furnace slag and the remainder of coal gangue powder with a particle size of 100 μm.

[0117] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0118] Step 1: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 130°C to obtain component A;

[0119] Step 2: Weigh waste rubber powder, petroleum resin and solid filler according to the designed ratio to obtain component B;

[0120] Step 3: Heat the component A to 155° C., add the component B, and shear and mix at a rotation speed of 5000 rpm for 10 minutes to obtain the high-strength asphalt-based pavement material.

[0121] The preparation method of the deacidified waste grease comprises the following contents:

[0122] S1. 300 g macadamia nut shells were crushed and mixed evenly with 100 g activated carbon. The mixture was heated to 350° C. and sintered for 3 h. The sintered product was acidified with a 0.8 mol / L sulfuric acid solution for 8 min. The solid-liquid separation was performed and the product was dried to obtain an activated carbon material.

[0123] S2. 150 g of chitosan and the activated carbon material were evenly mixed and dispersed in 1500 mL of deionized water. 32 g of potassium persulfate was added. Under an inert atmosphere, the system was heated to 80° C. for grafting reaction for 7 h. The solid-liquid separation was performed and the mixture was dried to obtain an active carrier.

[0124] S3, dispersing the active carrier in 2300 mL of a 0.6 mol / L potassium hydroxide solution, mixing the mixture at 45° C. for 40 min, separating the solid and the liquid, and drying the mixture to obtain a solid deacidified material;

[0125] S4. The solid deacidified material was evenly mixed with 1.5 kg of waste cooking oil, and the mixture was deacidified at 108° C. for 35 min. The mixture was centrifuged at 600 rpm for 6 min, the supernatant was discarded, and the centrifuged product was washed with deionized water until neutral to obtain deacidified waste oil with an acid value of 4 mgKOH / g.

[0126] Comparative Example 2

[0127] This comparative example provides a high-strength asphalt-based pavement material and a preparation method thereof. The difference from Example 1 is that deacidified waste grease is replaced with kitchen waste grease, specifically including the following contents:

[0128] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 70 parts of waste rubber powder, 35 parts of No. 90 base asphalt, 12 parts of sodium lignin sulfonate modified petroleum resin, 10 parts of waste cooking oil and 25 parts of solid filler; wherein the solid filler includes the following raw material components in parts by mass: 22% of furan resin glass fiber reinforcement material, 25% of cement kiln dust with a particle size of 30 μm, 20% of blast furnace slag and the balance of coal gangue powder with a particle size of 100 μm.

[0129] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0130] Step 1: Weigh base asphalt and waste cooking oil according to the designed ratio, mix them evenly at 130° C. to obtain component A;

[0131] Step 2: Weigh waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler according to the designed ratio to obtain component B;

[0132] Step 3: Heat the component A to 155° C., add the component B, and shear and mix at a rotation speed of 5000 rpm for 10 minutes to obtain the high-strength asphalt-based pavement material.

[0133] The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0134] Step a, dissolving 200 g of C9 petroleum resin in 1500 mL of toluene, and subjecting the mixture to microwave treatment at a microwave power of 350 W for 3 min to obtain a petroleum resin solution;

[0135] Step b, dissolving 20g of sodium lignin sulfonate in 100mL of 45% mass concentration ethanol solution, mixing with the petroleum resin solution, adding 4g of dibenzoyl peroxide, and conducting a free radical reaction at 55°C under an inert atmosphere for 10h, solid-liquid separation, to obtain sodium lignin sulfonate modified petroleum resin.

[0136] Comparative Example 3

[0137] This comparative example provides a high-strength asphalt-based pavement material and a preparation method thereof. The difference from Example 1 is that the furan resin glass fiber reinforcement material in the solid filler is replaced with an equal amount of epoxy resin-coated glass fiber material, specifically including the following contents:

[0138] The high-strength asphalt-based pavement material includes the following raw material components in parts by mass: 70 parts of waste rubber powder, 35 parts of No. 90 base asphalt, 12 parts of sodium lignin sulfonate modified petroleum resin, 10 parts of deacidified waste oil and grease, and 25 parts of solid filler; wherein the solid filler includes the following raw material components in parts by mass: 22% of epoxy resin-coated glass fiber material, 25% of cement kiln dust with a particle size of 30 μm, 20% of blast furnace slag, and the remainder of coal gangue powder with a particle size of 100 μm.

[0139] The preparation method of the high-strength asphalt-based pavement material comprises the following steps:

[0140] Step 1: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 130°C to obtain component A;

[0141] Step 2: Weigh waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler according to the designed ratio to obtain component B;

[0142] Step 3: Heat the component A to 155° C., add the component B, and shear and mix at a rotation speed of 5000 rpm for 10 minutes to obtain the high-strength asphalt-based pavement material.

[0143] The preparation method of the deacidified waste grease comprises the following contents:

[0144] S1. 300 g macadamia nut shells were crushed and mixed evenly with 100 g activated carbon. The mixture was heated to 350° C. and sintered for 3 h. The sintered product was acidified with a 0.8 mol / L sulfuric acid solution for 8 min. The solid-liquid separation was performed and the product was dried to obtain an activated carbon material.

[0145] S2. 150 g of chitosan and the activated carbon material were evenly mixed and dispersed in 1500 mL of deionized water. 32 g of potassium persulfate was added. Under an inert atmosphere, the system was heated to 80° C. for grafting reaction for 7 h. The solid-liquid separation was performed and the mixture was dried to obtain an active carrier.

[0146] S3, dispersing the active carrier in 2300 mL of a 0.6 mol / L potassium hydroxide solution, mixing the mixture at 45° C. for 40 min, separating the solid and the liquid, and drying the mixture to obtain a solid deacidified material;

[0147] S4. The solid deacidified material was evenly mixed with 1.5 kg of waste cooking oil, and the mixture was deacidified at 108° C. for 35 min. The mixture was centrifuged at 600 rpm for 6 min, the supernatant was discarded, and the centrifuged product was washed with deionized water until neutral to obtain deacidified waste oil with an acid value of 4 mgKOH / g.

[0148] The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps:

[0149] Step a, dissolving 200 g of C9 petroleum resin in 1500 mL of toluene, and subjecting the mixture to microwave treatment at a microwave power of 350 W for 3 min to obtain a petroleum resin solution;

[0150] Step b, dissolving 20g of sodium lignin sulfonate in 100mL of 45% mass concentration ethanol solution, mixing with the petroleum resin solution, adding 4g of dibenzoyl peroxide, and conducting a free radical reaction at 55°C under an inert atmosphere for 10h, solid-liquid separation, to obtain sodium lignin sulfonate modified petroleum resin.

[0151] The preparation method of the epoxy resin coated glass fiber material comprises the following steps:

[0152] The epoxy resin coated glass fiber material includes the following raw material components in percentage by weight: 23% epoxy resin, 60% glass fiber, 10% nano-silicon dioxide with a particle size of 150 nm, and 7% paraffin oil.

[0153] The preparation method of the epoxy resin-coated glass fiber material includes the following steps: weighing various raw material components except glass fiber according to the designed ratio, stirring at 50°C and a rotation speed of 300 rpm to mix evenly to obtain a liquid reinforcing agent; soaking short glass fibers with a length of 0.5 mm in the liquid reinforcing agent, separating the solid and the liquid, and drying to obtain the epoxy resin-coated glass fiber material.

[0154] In order to further demonstrate the technical effects of the present invention, the present invention conducted the following performance tests on the high-strength asphalt-based pavement materials obtained in Examples 1-3 and Comparative Examples 1-3:

[0155] With reference to JTT798-2011, the needle penetration test, softening point test and ductility test were carried out on each high-strength asphalt-based pavement material, and the results are shown in Table 1; with reference to JTGE20-2011, the Marshall stability test and dynamic stability test were carried out on each high-strength asphalt-based pavement material, and with reference to GB / T38948-2020, the low-temperature crack resistance of the high-strength asphalt-based pavement material was evaluated, and the results are shown in Table 2.

[0156] Table 1 Performance test results of high-strength asphalt-based pavement materials obtained in various embodiments and comparative examples

[0157]

[0158] Table 2 Performance test results of various high-strength asphalt-based pavement materials

[0159]

[0160] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-strength asphalt-based pavement material, characterized by: The high-strength asphalt-based pavement material comprises the following raw material components by weight: 60-80 parts of waste rubber powder, 20-50 parts of base asphalt, 10-20 parts of sodium lignin sulfonate modified petroleum resin, 5-15 parts of deacidified waste grease, and 20-30 parts of solid filler; The raw material components of the solid filler include furan resin glass fiber reinforcement, cement kiln dust, blast furnace slag and coal gangue powder; The preparation method of the deacidified waste grease comprises the following steps: S1. Grinding nut shells, mixing with activated carbon, sintering, acidifying, and drying to obtain activated carbon material; S2, dispersing chitosan and the activated carbon material in deionized water, adding an initiator, carrying out a grafting reaction under an inert atmosphere, separating the solid and the liquid, and drying to obtain an active carrier; S3, dispersing the active carrier in an alkaline solution, mixing at 40-50° C., solid-liquid separation, and drying to obtain a solid deacidified material; S4. Evenly mix the solid deacidified material with the kitchen waste grease, perform deacidification treatment at 100-120° C., centrifuge, and wash to obtain the deacidified waste grease.

2. The high-strength asphalt-based pavement material according to claim 1, characterized in that: In step S1, the nut shell is macadamia nut shell, cashew nut shell or pistachio nut shell; In step S1, the mass ratio of the nut shell to the activated carbon is 2:1-4:1; In step S1, the sintering temperature is 300-400°C, and the sintering time is 2-4 hours; In step S1, the acidification is carried out using a strong acid solution with a concentration of 0.5-1 mol / L; In step S1, the acidification time is 5-10 minutes.

3. The high-strength asphalt-based pavement material according to claim 1, characterized in that: In step S2, the mass ratio of the chitosan, activated carbon material and initiator is 0.3:1:0.1-0.5:1:0.1; In step S2, the initiator is potassium persulfate; In step S2, the grafting reaction temperature is 70-90°C, and the grafting reaction time is 6-8h; In step S2, the mass volume ratio of the chitosan to the deionized water is 1 g:10 mL-1 g:15 mL.

4. The high-strength asphalt-based pavement material according to claim 1, characterized in that: In step S3, the mass volume ratio of the active carrier to the alkaline solution is 1g:5mL-1g:8mL; In step S3, the mixing time is 30-50 minutes; In step S4, the deacidification treatment time is 30-40 minutes; In step S4, the mass ratio of the solid deacidification material to the waste cooking oil is 0.2:1-0.4:1; In step S4, the centrifugal speed is 500-700 rpm, and the centrifugal time is 5-10 min.

5. The high-strength asphalt-based pavement material according to claim 1, characterized in that: The preparation method of the sodium lignin sulfonate modified petroleum resin comprises the following steps: Step a, dissolving petroleum resin in toluene and subjecting to microwave treatment to obtain a petroleum resin solution; Step b, dissolving sodium lignin sulfonate in an alcohol solution, mixing the mixture with the petroleum resin solution, adding an initiator, carrying out a free radical reaction at 50-60° C. under an inert atmosphere, and performing solid-liquid separation to obtain the sodium lignin sulfonate modified petroleum resin.

6. The high-strength asphalt-based pavement material according to claim 1, characterized in that: The solid filler comprises the following raw material components in percentage by mass: 15%-25% furan resin glass fiber reinforcement material, 15%-25% cement kiln dust, 10%-30% blast furnace slag and the balance coal gangue powder.

7. The high-strength asphalt-based pavement material according to claim 1 or 6, characterized in that: The blast furnace slag includes the following chemical components by mass percentage: SiO2: 32%-37%, Al2O3: 26%-29%, CaO: 30%-35%, MgO: 4%-6% and Fe2O3: 5%-7%; The furan resin glass fiber reinforced material comprises the following raw material components in percentage by mass: 10%-20% furan resin, 50%-65% glass fiber, 5%-10% fluorocarbon resin, 5%-10% nano silicon dioxide and 3%-7% paraffin oil.

8. The method for preparing a high-strength asphalt-based pavement material according to any one of claims 1 to 7, wherein: The steps include: Weigh the base asphalt and deacidified waste grease according to the designed ratio, mix them evenly at 120-140°C to obtain component A; According to the designed ratio, waste rubber powder, sodium lignin sulfonate modified petroleum resin and solid filler are weighed and mixed evenly to obtain component B; The component A is heated to 150-160° C., the component B is added, and the mixture is sheared and mixed to obtain the high-strength asphalt-based pavement material.

9. Use of the high-strength asphalt-based pavement material according to any one of claims 1 to 7 in road engineering construction.

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