Cold region pavement regeneration and repair material and preparation method thereof

Abstract

A cold region pavement regeneration and repair material and a preparation method thereof relate to the technical fields of road construction materials and highway and urban road design, and specifically to a cold region pavement regeneration and repair material and a preparation method thereof. The purpose of the present invention is to solve the problem that existing pavement materials affected by the low temperature climate in cold regions suffer from cracks, potholes, subsidence, and other defects, which are prone to falling off or cracking again, affecting traffic. The cold region pavement regeneration and repair material is prepared by weight from 40 to 60 parts of waste asphalt pavement milling material, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer, and 10 to 20 parts of kerosene. The present invention is simple to operate and fast to construct, and can be applied to both the pavement base layer and the pavement surface layer.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction materials and highway and urban road design, and in particular to a cold region road surface regeneration and repairing material and a preparation method thereof. Background Art

[0002] According to data from the Ministry of Transport, as of the end of 2021, the total mileage of highways in China was 5.2807 million kilometers, of which 5.2516 million kilometers were under maintenance, accounting for 99.4% of the total mileage. The expressway mileage reached 169,100 kilometers, with asphalt pavement accounting for over 90% of the total. The road maintenance process generates a large amount of waste asphalt mixture. According to statistics from 2012, major and medium-sized repair projects on my country's trunk roads alone generate 160 million tons of recycled asphalt pavement material annually, causing serious environmental pollution and waste of resources. Currently, the utilization rate of asphalt pavement materials in my country is low, with statistics showing that the proportion of recycled pavement is less than 30%. Therefore, the effective and efficient utilization of waste asphalt mixture, turning it into valuable material and returning it to the road surface for transportation, is a crucial process technology.

[0003] Factory-mixed hot recycling technology is the most widely applicable of the four common asphalt pavement recycling technologies, and it is also an environmentally friendly technology with the best mixture recycling effect. This technology is to remix waste materials, new mineral materials, and new asphalt in a certain proportion using recycling equipment, and then spread them into a new asphalt concrete pavement structure layer. However, this technology is currently mostly promoted and applied in the high-temperature areas in southern my country, and is less used in the cold areas in the north, especially in the northeast. A more systematic cold-region pavement recycling and repair material and its preparation method are proposed. Explore and summarize a set of practical asphalt recycling mixture mix design processes that are suitable for the characteristics of cold regions, a scientific and reasonable mixture production process, and a quality-qualified asphalt pavement recycling and repair technology construction process. Provide a more complete construction technology basis for future highway recycling project construction, better use asphalt pavement recycling and repair technology in engineering construction, and give full play to the good economic, social, and environmental benefits of this technology.

[0004] According to the mixing temperature and mixing location of the recycled pavement components, asphalt pavement regeneration methods can be roughly divided into five categories: factory-mixed hot regeneration, factory-mixed cold regeneration, in-situ hot regeneration, in-situ cold regeneration and full-depth cold regeneration.

[0005] The factory-mixed hot recycling technology is to excavate the old asphalt pavement and transport it back to the mixing plant for centralized crushing. According to the quality requirements of different levels of the pavement, the proportion of the old asphalt mixture is designed and the addition ratio of the old asphalt mixture is determined. The regeneration agent, new asphalt material, new aggregate, etc. are re-mixed into a new mixture in a mixer according to a certain proportion. Since asphalt is very sensitive to temperature changes, the old asphalt will age rapidly or burn when the temperature is too high, and the recovery rate of waste asphalt mixture is relatively low.

[0006] The factory-mixed cold recycling technology is a production process in which recycled materials from old asphalt pavement are mixed with external binder regeneration agents and used as the pavement base or surface layer. Its main disadvantages are low performance and inability to be used as a surface layer.

[0007] In-situ hot regeneration technology uses special equipment to heat and soften the old road surface, mechanically mills it, and infiltrates a certain amount of new asphalt, regeneration agent, new asphalt mixture or new aggregate on site. The technology then mixes and spreads the resulting recycled mixture on site, rolls it, and regenerates the old asphalt concrete pavement within a certain depth range on the surface at one time. Its disadvantages are that the construction line is long, the regeneration construction limit can only be 2 to 5 cm, and there are many supporting equipment and the process is relatively complicated.

[0008] In-situ cold recycling technology uses dedicated in-situ cold recycling equipment to cold mill, crush, and screen (if necessary) the asphalt pavement on-site. A certain amount of new aggregate, recycled binder, active filler (cement, lime, etc.), and water are then infiltrated. The process then involves mixing, paving, and compacting the asphalt pavement at room temperature, effectively regenerating the old asphalt pavement in one go. However, its disadvantages are that the process is relatively complex, and the pavement regenerated using in-situ cold recycling has low performance and cannot be used as a surface layer.

[0009] Full-depth cold recycling technology is a new road construction process. It makes full use of the materials of old asphalt pavement (from the surface layer to the base layer). It uses special cold recycling machinery at room temperature to mill and crush the old asphalt pavement materials, add a certain amount of additives and water to mix them thoroughly, and then level and roll them on site to form a new type of pavement base that meets the road strength requirements after curing. However, its shortcomings are also very obvious. The construction quality control is difficult, the construction process is complicated, and an asphalt overlay layer needs to be added. In addition, the performance of the pavement regenerated by full-depth cold recycling technology is low and cannot be used as a surface layer.

[0010] Therefore, there is currently a demand for a high-performance cold zone pavement regeneration and repair material suitable for cold zones to solve the problem of road surface materials being easily detached or cracked again due to the low temperature climate in cold zones (cracks, potholes, subsidence, etc.), which affect traffic. Summary of the Invention

[0011] The purpose of the present invention is to solve the problem that the existing pavement materials affected by the low temperature climate in cold areas have cracks, potholes, subsidence and other defects, which are easy to fall off or crack again, affecting traffic, and to provide a cold area pavement regeneration and repair material and its preparation method.

[0012] A cold region pavement regeneration and repair material is prepared from 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene in parts by weight.

[0013] A method for preparing a cold region road surface regeneration and repair material is specifically completed by the following steps:

[0014] 1. Weighing ingredients:

[0015] Weigh 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene according to weight;

[0016] 2. Add the SC optimized modified regeneration agent and waste asphalt pavement milling material into the reactor, stir at a temperature of 90℃~110℃ and a speed of 300r / min for 40min~45min, then add a quarter of No. 90 base asphalt and activator, stir at a temperature of 90℃~110℃ and a speed of 4800r / min for 50min~60min to obtain the first component mixture;

[0017] 3. Place one-third of No. 90 base asphalt and stabilizer into a reactor, stir at a temperature of 50°C to 60°C and a rotation speed of 500 r / min for 15 minutes to 20 minutes to obtain a second component mixture;

[0018] Fourth, heat the remaining No. 90 base asphalt to 140°C, then place it together with the plasticizer and anti-aging agent in a high-speed shearing device and circulate shearing for 10 to 20 minutes at a shear speed of 480 r / min to obtain a third component mixture;

[0019] 5. Heat the first component mixture to 140°C ~ 160°C and pour it into a stirring device, then add kerosene, and stir at a high speed of 120°C ~ 180°C and a speed of 5000r / min for 10min ~ 15min, then add the second component mixture, continue stirring at 130°C ~ 160°C and a speed of 5000r / min for 20min ~ 30min, finally add the third component mixture, stir at a temperature of 100°C ~ 150°C and a speed of 5000r / min for 50min ~ 60min, and obtain the cold region pavement recycling and repair material.

[0020] The cold region pavement regeneration and repair material of the present invention is prepared by excavating, recycling, crushing and screening old asphalt pavement that needs to be renovated and reconstructed, selecting waste asphalt pavement milling materials of suitable standards, and then appropriately combining them with SC optimized modified regeneration agent, mineral material, No. 90 matrix asphalt, active agent, stabilizer, anti-aging agent and plasticizer, and remixing them into a regenerated asphalt mixture that meets the needs of road construction and complies with national and industry standards. The mixture is then applied to road construction and the paving of pavement surface layers or base layers, thereby providing a complete set of production technology.

[0021] Principle of the present invention:

[0022] The present invention utilizes 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 20 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 15 to 20 parts of active agent, 5 to 10 parts of stabilizer, 5 to 8 parts of anti-aging agent and 5 to 10 parts of plasticizer to prepare a cold region pavement regeneration and repair material. The synergistic effect of the components improves the integrity of the cold region pavement regeneration and repair material. The following is a brief analysis of the synergistic effect of these materials:

[0023] Waste asphalt pavement milling material and No. 90 base asphalt: Both waste asphalt pavement milling material and No. 90 base asphalt have potential bonding properties. When heated to 120°C, they form a cohesive gel-like substance, which helps improve the compressive strength and hardening speed of concrete. In addition, the synergistic effect between waste asphalt pavement milling material and No. 90 base asphalt can increase the density and impermeability of the material;

[0024] SC optimized modified regeneration agent: composed of propylene carbonate, concentrated sulfuric acid and alkali solution. The propylene carbonate is an organic aromatic hydrocarbon extractant, which ensures the realization of the regeneration of waste asphalt pavement milling materials. During the production process, the old asphalt in the waste asphalt pavement milling materials is unevenly distributed. During the production process, the old asphalt and the new asphalt (No. 90 matrix asphalt) cannot be effectively fused. The new asphalt (No. 90 matrix asphalt) plays a cementing role, while the old asphalt fails to play its cementing ability due to aging and hardening. The present invention adds an aromatic hydrocarbon extractant to the SC optimized modified regeneration agent to dissolve the old asphalt, reduce the viscosity of the old asphalt, and ensure that the old asphalt is evenly distributed during the production process, so that the new and old asphalts are evenly mixed. At the same time, heating can promote the curing reaction, has good storage stability, and also has a plasticizing effect, which plays a softening effect in the material system;

[0025] Mineral material: limestone particles are used as mineral material. Limestone is porous and hard, which is conducive to better improving the compressive strength of cold-region pavement regeneration and repair materials, making the cold-region pavement regeneration and repair materials have better fatigue resistance. At the same time, by controlling the particle size of basalt, it is conducive to better coordination and stacking of basalt with old aggregates, thereby improving the aggregate stacking density in cold-region pavement regeneration and repair materials, making the compressive strength and fatigue resistance of cold-region pavement regeneration and repair materials help to improve the density and compressive strength of cold-region pavement regeneration and repair materials. It synergistically forms a uniform and compact aggregate distribution with waste asphalt pavement milling materials and new asphalt (No. 90 base asphalt), thereby improving the overall performance of cold-region pavement regeneration and repair materials;

[0026] Stabilizer and activator: Maleic anhydride and anthracene oil work synergistically with tall oil to better separate old asphalt from mineral aggregate. This also helps improve the compatibility of old asphalt, mineral aggregate, and new asphalt, making it easier to mix the new and old asphalt and mineral aggregate evenly. This helps improve the compressive strength and fatigue resistance of the mixed cold-region pavement regeneration and repair material, thereby expanding the application range of the cold-region pavement regeneration and repair material, saving resources, and improving economic benefits.

[0027] Anti-aging agent: Polystyrene, 4-nitroanisole, edible vegetable oil materials dissolved in dichloromethane solution and polyvinyl alcohol solution are used as raw materials to adjust the four components of waste asphalt pavement milling materials. At the same time, the macromolecular polymers of aged asphalt are reduced to small molecules, such as carbonyl compounds are reduced to olefin compounds, further restoring the low-temperature ductility of the waste asphalt pavement milling materials. At the same time, the mixing temperature during the production process is further reduced, solving the problem of temperature control of the waste materials during the production process, and preventing the aging of the waste asphalt pavement milling materials during the production process.

[0028] Plasticizer: Using waste tire full rubber powder as the main material, a twin-screw extruder is used to extrude liquid regenerated rubber, and the liquid regenerated rubber and environmentally friendly aromatic oil are mixed in a ratio of 2:1 on a two-roll mill to prepare an intermediate product, and the intermediate product is vulcanized on a flat vulcanizer to prepare a plasticizer; the above-mentioned plasticizer used in the present invention has a good softening effect and good compatibility with asphalt, so that the product has good softness and plays a softening and plasticizing effect in the material system.

[0029] In summary, the synergistic effect of these components makes this cold region pavement regeneration and repair material have excellent compressive strength, durability, density and construction performance, and is an ideal material for cold region pavement repair.

[0030] The present invention has the following advantages and features:

[0031] 1. The present invention utilizes industrial waste residues and waste materials such as waste asphalt pavement milling materials, saving resources, reducing costs, and protecting the environment. It also reduces the cost of solid waste disposal for recycled materials. These waste residues and waste materials are generally difficult to handle and utilize. If they are directly discharged or landfilled, they will occupy land resources, pollute the environment, and cause waste. However, using them as components of materials can not only improve the performance of the materials, but also reduce the demand for fresh raw materials, save energy consumption, and reduce the cost of repair projects. It also conforms to the concepts of circular economy and green building.

[0032] 2. The present invention is easy to operate and quick to construct. It can be applied to both the base layer and the surface layer of the road. The method provided by the present invention only requires heating the material to 120°C and spreading it on the road surface to complete the repair work, without requiring additional maintenance time. Traffic can be opened to traffic within 6 hours after pressure-resistant solidification, reducing the cost of road sand and gravel raw materials. It does not require complex equipment and tools, lowers the equipment usage threshold and energy consumption, and is easy and quick to operate.

[0033] 3. The present invention can reduce the construction temperature of recycled asphalt mixture by 30-50°C, prevent the secondary aging of asphalt in RAP (recycled asphalt mixture), save energy, reduce the emission of asphalt smoke and toxic gases, and truly achieve green transportation and resource recycling;

[0034] 4. The present invention improves construction workability. Since the cooling rate of the paving surface of the warm-mix recycled asphalt mixture is generally 50% of the cooling rate of the hot-mix recycled asphalt mixture, the compaction time of the warm-mix recycled asphalt mixture can be extended, so that the rolling time is more sufficient and the compaction is more effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a finished product of a cold region pavement regeneration and repair material prepared in Example 1;

[0036] Figure 2 This is a Marshall test performance test piece of a cold region pavement regeneration and repair material prepared in Example 1. DETAILED DESCRIPTION

[0037] Specific embodiment 1: This embodiment is a cold region pavement regeneration and repair material, which is prepared by weight from 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene.

[0038] Unless otherwise specified, all raw materials used in the present invention are commercially available.

[0039] Specific embodiment 2: This embodiment differs from specific embodiment 1 in that the waste asphalt pavement milling material is the surface layer milling material of the asphalt road, and its particle size is 0.075mm to 1mm. The other steps are the same as those of specific embodiment 1.

[0040] Specific embodiment three: This embodiment differs from specific embodiment one or two in that: the SC optimized modified regeneration agent is prepared from propylene carbonate, concentrated sulfuric acid and alkali solution, and the preparation method is as follows: propylene carbonate is charged into a reactor, concentrated sulfuric acid is added dropwise while shearing and stirring to obtain an intermediate product; alkali is titrated with the intermediate product while shearing and stirring until the pH of the solution is between 9 and 9.5, and the titration is stopped to obtain the SC optimized modified regeneration agent; the volume ratio of propylene carbonate to concentrated sulfuric acid is (6-3):(5-2); the mass fraction of the concentrated sulfuric acid is 98%; the alkali solution is ammonia water or sodium hydroxide solution, the mass fraction of ammonia water is 25%, and the mass fraction of sodium hydroxide solution is 52.2%; the shear stirring temperature is 60°C, the shear stirring rate is 800 r / min, and the shear stirring time is 15 minutes. The other steps are the same as specific embodiment one or two.

[0041] Specific embodiment 4: This embodiment differs from specific embodiments 1 to 3 in that the ore material is limestone crushed by a ball mill, and its particle size is 9.5mm to 13.2mm. The other steps are the same as those of specific embodiments 1 to 3.

[0042] Specific embodiment 5: This embodiment differs from specific embodiments 1 to 4 in that the active agent is prepared as follows: tall oil is dripped into concentrated sulfuric acid at a temperature of 35-45°C and a stirring speed of 500 r / min for a titration time of 1 hour, and then alkali solution is dripped. The reaction temperature during the alkali titration is 20-25°C, the stirring speed is 200 r / min, and the solution pH is between 9 and 9.5. The titration is stopped to obtain the active agent. The volume ratio of the tall oil to the concentrated sulfuric acid is (5-3):(4-2); the mass fraction of the concentrated sulfuric acid is 98%; the mass fraction of the alkali solution is ammonia water or sodium hydroxide solution, the mass fraction of the ammonia water being 25% and the mass fraction of the sodium hydroxide solution being 52.2%. The other steps are the same as specific embodiments 1 to 4.

[0043] Specific embodiment 6: This embodiment differs from specific embodiments 1 to 5 in that the preparation method of the stabilizer is as follows:

[0044] 1. Add maleic anhydride and anthracene oil in a volume ratio of 1:1 into a reaction kettle, stir and react at a temperature of 105-115° C. and a stirring speed of 800 r / min for 15-20 minutes to obtain 9,10-dihydroanthracene-9,10-α,β-maleic anhydride;

[0045] 2. Add 9,10-dihydroanthracene-9,10-α,β-maleic anhydride and 2,2,6,6-tetramethyl-4-piperidinol into a reaction kettle at a volume ratio of 1:1, and stir at a temperature of 80-105° C. and a stirring speed of 1000 r / min for 20-30 minutes to obtain 4-tetramethylpiperidinol monoester;

[0046] 3. Mixing tetramethylpiperidinol mononitrate and a solution of sodium hydroxide and calcium chloride in a volume ratio of 1:3, stirring and reacting at a temperature of 50-70° C. and a stirring speed of 1000 r / min for 50-60 minutes, filtering, and drying the solid matter to obtain tetramethylpiperidinol mononitrate calcium salt, which is a stabilizer;

[0047] The preparation method of the sodium hydroxide calcium chloride salt solution described in step 3 is: dissolving NaOH and calcium chloride in deionized water to obtain a sodium hydroxide calcium chloride salt solution, wherein the concentration of NaOH is 25% and the concentration of calcium chloride is 12%. The other steps are the same as those of specific embodiments 1 to 5.

[0048] Specific embodiment 7: This embodiment differs from specific embodiments 1 to 6 in that the preparation method of the anti-aging agent is as follows:

[0049] ①. Preparation of non-aqueous phase solution:

[0050] Fully dissolving polystyrene, 4-nitroanisole and edible vegetable oil in dichloromethane, then adding acetone, and emulsifying with a high shear emulsifier at a speed of 5000 r / min for 20 to 25 minutes to obtain a non-aqueous phase solution;

[0051] The weight ratio of the polystyrene, 4-nitroanisole and edible vegetable oil described in step ① is (5-7):(1-2):(90-100);

[0052] The volume ratio of the polystyrene mass to dichloromethane described in step ① is (90g-110g):(170mL-180mL);

[0053] The volume ratio of dichloromethane to acetone described in step ① is (6-7):(4-5);

[0054] The edible vegetable oil described in step ① is olive oil;

[0055] ②, prepare aqueous solution;

[0056] dissolving polyvinyl alcohol in deionized water to obtain an aqueous phase solution;

[0057] The mass fraction of polyvinyl alcohol in the aqueous solution in step ② is 2%;

[0058] ③. At room temperature, the non-aqueous phase solution was dripped into the aqueous phase solution, and then emulsified at a speed of 5000 r / min for 1 hour using a high shear emulsifier, and then polyvinyl alcohol was added, and stirred at 40°C for 12 hours. Finally, the remaining dichloromethane was removed using a rotary evaporator at 50°C to obtain a solid substance; the solid substance was washed with distilled water 3 to 5 times, and then placed in an oven at a temperature of 50°C to obtain an anti-aging agent;

[0059] The volume ratio of the non-aqueous phase solution, the aqueous phase solution and the polyvinyl alcohol in step ③ is (2-5):(6-9):(10-13). The other steps are the same as those in specific embodiments 1 to 6.

[0060] Specific embodiment eight: This embodiment differs from specific embodiments one to seven in that the preparation method of the plasticizer is as follows:

[0061] ①Use a twin-screw extruder at a temperature of 320℃ and a rotation speed of 30r / min to extrude the rubber powder from waste tires to obtain liquid recycled rubber;

[0062] ②, liquid recycled rubber and environmentally friendly aromatic oil are mixed in a mass ratio of 2:1 on a two-roll mill to prepare an intermediate product, and then the intermediate product is vulcanized on a flat vulcanizer to prepare a plasticizer;

[0063] The vulcanization temperature in step ② is 145° C. and the vulcanization time is 90 seconds. The other steps are the same as those in specific embodiments 1 to 7.

[0064] Specific embodiment 9: This embodiment is a preparation method of cold region road surface regeneration repair material, which is specifically completed by the following steps:

[0065] 1. Weighing ingredients:

[0066] Weigh 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene according to weight;

[0067] 2. Add the SC optimized modified regeneration agent and waste asphalt pavement milling material into the reactor, stir at a temperature of 90℃~110℃ and a speed of 300r / min for 40min~45min, then add a quarter of No. 90 base asphalt and activator, stir at a temperature of 90℃~110℃ and a speed of 4800r / min for 50min~60min to obtain the first component mixture;

[0068] 3. Place one-third of No. 90 base asphalt and stabilizer into a reactor, stir at a temperature of 50°C to 60°C and a rotation speed of 500 r / min for 15 minutes to 20 minutes to obtain a second component mixture;

[0069] Fourth, heat the remaining No. 90 base asphalt to 140°C, then place it together with the plasticizer and anti-aging agent in a high-speed shearing device and circulate shearing for 10 to 20 minutes at a shear speed of 480 r / min to obtain a third component mixture;

[0070] 5. Heat the first component mixture to 140°C ~ 160°C and pour it into a stirring device, then add kerosene, and stir at a high speed of 120°C ~ 180°C and a speed of 5000r / min for 10min ~ 15min, then add the second component mixture, continue stirring at 130°C ~ 160°C and a speed of 5000r / min for 20min ~ 30min, finally add the third component mixture, stir at a temperature of 100°C ~ 150°C and a speed of 5000r / min for 50min ~ 60min, and obtain the cold region pavement recycling and repair material.

[0071] Specific Embodiment 10: This embodiment differs from Specific Embodiment 9 in that the cold-region pavement regeneration repair material is used by heating the cold-region pavement regeneration repair material to 120°C, spreading it on the pavement, compacting and smoothing it, and completing the pavement repair after the cold-region pavement regeneration repair material hardens. The remaining steps are the same as Specific Embodiment 9.

[0072] The following examples are used to verify the beneficial effects of the present invention:

[0073] Example 1: A cold region pavement regeneration and repair material is prepared from 60 parts by weight of waste asphalt pavement milling material, 10 parts of No. 90 base asphalt, 25 parts of SC optimized modified regeneration agent, 15 parts of mineral material, 18 parts of active agent, 8 parts of stabilizer, 8 parts of anti-aging agent, 8 parts of plasticizer, and 18 parts of kerosene;

[0074] Test the properties of the raw materials and check whether their performance indicators meet the requirements:

[0075] The waste asphalt pavement milling material described in Example 1 is the surface layer milling material of the asphalt road;

[0076] Because the road performance of a cold-region pavement regeneration and repair material containing waste asphalt pavement milling material primarily depends on the properties of the waste asphalt pavement milling material, the properties of the waste asphalt pavement milling material should be tested before preparing the designed cold-region pavement regeneration and repair material. First, a centrifugal extraction test was conducted on the waste asphalt pavement milling material to separate the asphalt binder from the old aggregate. The extracted mineral material was then screened to determine the gradation composition of the mineral material in the waste asphalt pavement milling material. The test results are shown in Table 1.

[0077] Table 1 is the test results of the mineral screening test of the waste asphalt pavement milling material extraction test in this embodiment

[0078]

[0079] The engineering technical indicators of the above-mentioned waste asphalt pavement milling materials were tested. The test method was carried out in accordance with the "Specifications for Testing Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). The test requirements are shown in Table 2. The data in Table 2 show that the various engineering technical indicators of the waste asphalt pavement milling materials meet the technical requirements of the present invention and can be recycled.

[0080] Table 2 is the engineering technical index test results of the waste asphalt pavement milling material of this embodiment

[0081]

[0082] The mineral material described in Example 1 is a coarse aggregate, which is obtained by crushing limestone by a crushing ball mill; limestone was selected and crushed by a crushing ball mill to maintain a particle size of 9.5 mm to 13.2 mm, and its performance was tested. The test results are shown in Table 3;

[0083] Table 3 is the engineering technical index test results of coarse aggregate in this embodiment

[0084]

[0085]

[0086] The data in Table 3 show that all the engineering technical indicators of coarse aggregate meet the requirements of the Technical Specifications for Highway Asphalt Pavement Construction.

[0087] The technical requirements in (JTG F40-2004) can be applied to a cold region pavement regeneration and repair material and a preparation method thereof.

[0088] The SC optimized modified regeneration agent described in Example 1 is prepared from propylene carbonate, concentrated sulfuric acid and alkali solution, and the preparation method is as follows: propylene carbonate is charged into a reactor, and concentrated sulfuric acid is added dropwise while shearing and stirring to obtain an intermediate product; alkali is titrated with the intermediate product while shearing and stirring until the pH of the solution is between 9 and 9.5, and the titration is stopped to obtain the SC optimized modified regeneration agent; the volume ratio of the propylene carbonate to the concentrated sulfuric acid is 6:5; the mass fraction of the concentrated sulfuric acid is 98%; the alkali solution is sodium hydroxide solution, and the mass fraction of the sodium hydroxide solution is 52.2%; the shear stirring temperature is 60°C, the shear stirring rate is 800 r / min, and the shear stirring time is 15 min; the obtained SC optimized modified regeneration agent is subjected to performance testing, and the test results are shown in Table 4;

[0089] Table 4 is the engineering technical index test results of the SC optimized modified regeneration agent of this embodiment

[0090] pilot projects Test value Technical requirements Appearance requirements Brown viscous liquid ---- <![CDATA[Density value (g / cm 3 )]]> 0.89 0.8～1.0 Rubber hydrocarbon content (%) 86 ≥80 Viscosity (Pa·s) 0.73 ≤0.8 Flash point (℃) 100 55～110

[0091] The No. 90 base asphalt described in Example 1 is CNOOC No. 90-A asphalt, and the test results are shown in Table 5.

[0092] Table 5 shows the engineering technical index test results of CNOOC 90 asphalt in this embodiment.

[0093]

[0094]

[0095] As shown in Table 5, all engineering technical indicators of asphalt meet the technical requirements of the "Technical Specifications for Highway Asphalt Pavement Construction" (JTGF40-2004), and can be applied to a cold region pavement regeneration and repair material and its preparation method.

[0096] The active agent described in Example 1 is prepared as follows: tall oil is dropwise added to concentrated sulfuric acid at a temperature of 40°C and a stirring speed of 500 r / min for a titration time of 1 hour, and then an alkali solution is dropwise added. The reaction temperature during the alkali titration is 25°C, the stirring speed is 200 r / min, and the solution pH is between 9 and 9.5. The titration is stopped to obtain the active agent. The volume ratio of the tall oil to the concentrated sulfuric acid is 5:3; the mass fraction of the concentrated sulfuric acid is 98%; and the alkali solution is a sodium hydroxide solution with a mass fraction of 52.2%.

[0097] The preparation method of the stabilizer described in Example 1 is as follows:

[0098] 1. Add maleic anhydride and anthracene oil in a volume ratio of 1:1 into a reactor, stir and react at a temperature of 110°C and a stirring speed of 800 r / min for 15 minutes to obtain 9,10-dihydroanthracene-9,10-α,β-maleic anhydride;

[0099] 2. Add 9,10-dihydroanthracene-9,10-α,β-maleic anhydride and 2,2,6,6-tetramethyl-4-piperidinol into a reaction kettle at a volume ratio of 1:1, and stir at 90°C and 1000 r / min for 20 minutes to obtain tetramethylpiperidinol ester;

[0100] 3. Mixing tetramethylpiperidinol mononitrate and a solution of sodium hydroxide and calcium chloride in a volume ratio of 1:3, stirring and reacting at a temperature of 60° C. and a stirring speed of 1000 r / min for 50 minutes, filtering, and drying the solid matter to obtain tetramethylpiperidinol mononitrate calcium salt, which is a stabilizer;

[0101] The preparation method of the sodium hydroxide calcium chloride salt solution described in step 3 is: dissolving NaOH and calcium chloride in deionized water to obtain the sodium hydroxide calcium chloride salt solution, wherein the concentration of NaOH is 25% and the concentration of calcium chloride is 12%.

[0102] The preparation method of the anti-aging agent described in Example 1 is as follows:

[0103] ①. Preparation of non-aqueous phase solution:

[0104] Polystyrene, 4-nitroanisole and edible vegetable oil were fully dissolved in dichloromethane, and then acetone was added, followed by emulsification using a high shear emulsifier at a speed of 5000 r / min for 25 minutes to obtain a non-aqueous phase solution;

[0105] The weight ratio of the polystyrene, 4-nitroanisole and edible vegetable oil described in step ① is 6:1.5:90;

[0106] The mass ratio of the polystyrene described in step ① to the volume ratio of dichloromethane is 95g:175mL;

[0107] The volume ratio of dichloromethane to acetone described in step ① is 7:4;

[0108] The edible vegetable oil described in step ① is olive oil;

[0109] ②, prepare aqueous solution;

[0110] dissolving polyvinyl alcohol in deionized water to obtain an aqueous phase solution;

[0111] The mass fraction of polyvinyl alcohol in the aqueous solution in step ② is 2%;

[0112] ③. At room temperature, the non-aqueous phase solution was dropped into the aqueous phase solution, and then emulsified at a speed of 5000 r / min for 1 hour using a high shear emulsifier, and then polyvinyl alcohol was added. The mixture was stirred at 40°C for 12 hours, and finally, the remaining dichloromethane was removed using a rotary evaporator at 50°C to obtain a solid substance; the solid substance was washed three times with distilled water, and then dried in an oven at a temperature of 50°C to obtain an anti-aging agent;

[0113] The volume ratio of the non-aqueous phase solution, the aqueous phase solution and the polyvinyl alcohol described in step ③ is 5:8:12.

[0114] The preparation method of the plasticizer described in Example 1 is as follows:

[0115] ①Use a twin-screw extruder at a temperature of 320℃ and a rotation speed of 30r / min to extrude the rubber powder from waste tires to obtain liquid recycled rubber;

[0116] ②, liquid recycled rubber and environmentally friendly aromatic oil are mixed in a mass ratio of 2:1 on a two-roll mill to prepare an intermediate product, and then the intermediate product is vulcanized on a flat vulcanizer to prepare a plasticizer;

[0117] The vulcanization temperature in step ② is 145° C., and the vulcanization time is 90 seconds.

[0118] A method for preparing a cold region road surface regeneration and repair material is specifically completed by the following steps:

[0119] 1. Weighing ingredients:

[0120] The preparation method is as follows: 60 parts by weight of waste asphalt pavement milling material, 10 parts by weight of No. 90 base asphalt, 25 parts by weight of SC optimized modified regeneration agent, 15 parts by weight of mineral material, 18 parts by weight of active agent, 8 parts by weight of stabilizer, 8 parts by weight of anti-aging agent, 8 parts by weight of plasticizer and 18 parts by weight of kerosene;

[0121] 2. Add the SC optimized modified regeneration agent and waste asphalt pavement milling material into the reactor, stir at a temperature of 90°C and a speed of 300 r / min for 45 minutes, then add a quarter of No. 90 base asphalt and an active agent, stir at a temperature of 90°C and a speed of 4800 r / min for 60 minutes to obtain a first component mixture;

[0122] 3. Place one-third of No. 90 base asphalt and stabilizer into a reactor, stir at a temperature of 50°C and a rotation speed of 500 r / min for 20 minutes to obtain a second component mixture;

[0123] Fourth, heat the remaining No. 90 base asphalt to 140°C, then place it together with the plasticizer and anti-aging agent in a high-speed shearing device and circulate shearing for 10 minutes at a shear speed of 480 r / min to obtain a third component mixture;

[0124] 5. Heat the first component mixture to 140°C and pour it into a stirring device, then add kerosene, and stir at a high speed of 120°C and 5000r / min for 10 minutes, then add the second component mixture, and continue stirring at 130°C and 5000r / min for 30 minutes, and finally add the third component mixture, and stir at a temperature of 100°C and 5000r / min for 60 minutes to obtain the cold region pavement regeneration and repair material.

[0125] The cold region pavement regeneration and repair material prepared in Example 1 was subjected to volume parameter testing, Marshall test, and tests on relevant road performance, such as high temperature performance, water stability, and low temperature performance. The test results are shown in Tables 6 and 7. The road performance was also tested to see whether it met the technical requirements of the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0126] Table 6 shows the volume parameter index of a cold region road regeneration and repair material in this embodiment.

[0127]

[0128] Table 7 shows the road performance test results of a cold region road regeneration and repair material according to this embodiment.

[0129]

[0130]

[0131] As shown in Table 7, the Marshall volume index, residual stability, water stability, high temperature stability and low temperature crack resistance of the cold region pavement regeneration and repair material prepared in Example 1 can meet the technical requirements of the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004), indicating that the designed cold region pavement regeneration and repair material and the preparation method thereof are reasonable, and also demonstrating the feasibility of the preparation method of the present invention.

[0132] Example 2: This example differs from Example 1 in that a cold-region pavement regeneration and repair material is prepared from, by weight, 55 parts of waste asphalt pavement milling material, 13 parts of No. 90 base asphalt, 25 parts of SC optimized modified regeneration agent, 15 parts of mineral material, 18 parts of active agent, 6 parts of stabilizer, 5 parts of anti-aging agent, 5 parts of plasticizer, and 18 parts of kerosene. Other steps and parameters are the same as in Example 1.

[0133] The cold region pavement regeneration and repair material prepared in Example 2 was subjected to volume parameter testing, Marshall testing, and tests on relevant road performance, such as high temperature performance, water stability, and low temperature performance. The test results are shown in Tables 8 and 9. The road performance was also tested to determine whether it met the technical requirements of the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0134] Table 8 shows the volume parameter index of a cold region road regeneration and repair material in this embodiment.

[0135]

[0136] Table 9 shows the road performance test results of a cold region road regeneration and repair material according to this embodiment.

[0137]

[0138] As shown in Table 9, by improving the above-mentioned preparation method, the Marshall volume index, residual stability, water stability, high temperature stability and low temperature crack resistance of a cold region pavement regeneration and repair material can meet the "Technical Specifications for Highway Asphalt Pavement Construction".

[0139] Example 3: This example differs from Example 1 in that a cold-region pavement regeneration and repair material is prepared from, by weight, 40 parts of waste asphalt pavement milling material, 10 parts of No. 90 base asphalt, 25 parts of SC optimized modified regeneration agent, 15 parts of mineral material, 15 parts of active agent, 5 parts of stabilizer, 5 parts of anti-aging agent, 5 parts of plasticizer, and 18 parts of kerosene. Other steps and parameters are the same as in Example 1.

[0140] The cold region pavement regeneration and repair material prepared in Example 3 was subjected to volume parameter testing, Marshall test, and tests on relevant road performance, such as high temperature performance, water stability, and low temperature performance. The test results are shown in Tables 10 and 11. The road performance was also tested to see whether it met the technical requirements of the "Technical Specifications for Highway Asphalt Pavement Construction" (JTG F40-2004).

[0141] Table 10 shows the volume parameter index of a cold region pavement regeneration and repair material according to this embodiment.

[0142]

[0143] Table 11 shows the road performance test results of a cold region road regeneration and repair material according to this embodiment.

[0144]

[0145] As shown in Table 11, by improving the above-mentioned preparation method, the Marshall volume index, residual stability, water stability, high temperature stability and low temperature crack resistance of a cold region pavement regeneration and repair material can meet the "Technical Specifications for Highway Asphalt Pavement Construction".

[0146] The mechanical properties of a cold region pavement regeneration and repair material prepared in Examples 1 to 3 were tested, and the test results are shown in Table 12.

[0147] Table 12 shows the mechanical properties test results of a cold region pavement regeneration and repair material according to this embodiment.

[0148]

[0149] The tensile strength in Table 12 was tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0150] The compressive strength in Table 12 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0151] The flexural strength in Table 12 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0152] The bond tensile strength in Table 12 was tested in accordance with GB / T 17671-2021 “Test method for strength of cement mortar (ISO method)”;

[0153] The bond flexural strength in Table 12 was tested in accordance with GB / T 17671-2021 “Test method for strength of cement mortar (ISO method)”;

[0154] The initial setting time in Table 12 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0155] The final setting time in Table 12 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)".

[0156] Freeze-thaw cycle conditions: A cold-region pavement regeneration repair material - cement mortar bonding performance test piece that has been cured for 28 days is frozen at -25°C for 45 minutes and then thawed at room temperature of 25°C for 45 minutes. Its bonding strength is tested after 100 freeze-thaw cycles.

[0157] Chloride ion corrosion conditions: A cold region pavement regeneration repair material - cement mortar bonding performance test piece that had been cured for 28 days was immersed in a 10% concentration NaCl solution for 7 days, and then its bonding strength was tested.

[0158] The data of a cold region pavement regeneration and repair material prepared in Examples 1 to 3 before freezing, after freezing, before corrosion, and after corrosion are listed in Table 13;

[0159] Table 13 shows the test results of the cold region road regeneration and repair material before freezing, after freezing, before corrosion, and after corrosion in Examples 1 to 3.

[0160]

[0161] Comparative Example 1: The difference between this example and Comparative Example 1 is that the amount of SC optimized modified regeneration agent used is 0.2 parts. The other steps and parameters are the same as those in Example 1.

[0162] Comparative Example 2: This example differs from Comparative Example 1 in that the amount of the active agent used is 0.2 parts. Other steps and parameters are the same as those in Example 1.

[0163] Comparative Example 3: This example differs from Comparative Example 1 in that the amount of stabilizer used is 0.2 parts. Other steps and parameters are the same as those in Example 1.

[0164] Comparative Example 4: This example differs from Comparative Example 1 in that the amount of the anti-aging agent used is 0.2 parts. Other steps and parameters are the same as those in Example 1.

[0165] Comparative Example 5: This example differs from Comparative Example 1 in that the amount of plasticizer used is 0.2 parts. Other steps and parameters are the same as those in Example 1.

[0166] Performance test: The mechanical properties of the cold region pavement regeneration and repair materials prepared in Examples 1 to 5 were tested. The test results are shown in Table 14.

[0167] Table 14 shows the road performance test results of a cold region road regeneration and repair material prepared in comparative examples 1 to 5.

[0168]

[0169] The tensile strength in Table 14 was tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0170] The compressive strength in Table 14 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0171] The flexural strength in Table 14 is tested in accordance with GB / T 17671-2021 "Test method for strength of cement mortar (ISO method)";

[0172] The bond tensile strength in Table 14 was tested in accordance with GB / T 17671-2021 “Test method for strength of cement mortar (ISO method)”;

[0173] The bond flexural strength in Table 14 was tested in accordance with GB / T 17671-2021 “Test method for strength of cement mortar (ISO method)”;

[0174] Freeze-thaw cycle conditions: A cold-region pavement regeneration repair material - cement mortar bonding performance test piece that has been cured for 28 days is frozen at -25°C for 45 minutes and then thawed at room temperature of 25°C for 45 minutes. Its bonding strength is tested after 100 freeze-thaw cycles.

[0175] Chloride ion corrosion conditions: A cold region pavement regeneration repair material - cement mortar bonding performance test piece that had been cured for 28 days was immersed in a 10% concentration NaCl solution for 7 days, and then its bonding strength was tested.

[0176] The data of a cold region pavement regeneration and repair material prepared in Comparative Examples 1 to 5 before freezing, after freezing, before corrosion, and after corrosion are listed in Table 15;

[0177] Table 15 shows the road performance test results of a cold region road regeneration and repair material prepared in comparative examples 1 to 5.

[0178]

[0179] A cold region pavement regeneration and repair material in Examples 1 to 3 and Comparative Examples 1 to 5 was subjected to dynamic stability test, residual stability of immersion Marshall test, residual strength ratio test of freeze-thaw splitting test, four-point bending fatigue test and small beam bending test (-10°C). The relevant markings of each test reference are shown in Table 16, and the test results are shown in Table 16.

[0180] Table 16

[0181]

[0182]

[0183] Although this specification has provided a detailed description of the present invention using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications or improvements may be made based on the present invention. Therefore, such modifications or improvements, which do not depart from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A cold region road regeneration repair material, characterized in that The repair material is prepared from 40 to 60 parts by weight of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene. The SC optimized modified regeneration agent is prepared from propylene carbonate, concentrated sulfuric acid and alkali solution, and the preparation method is as follows: propylene carbonate is charged into a reactor, concentrated sulfuric acid is added dropwise while shearing and stirring to obtain an intermediate product; alkali is titrated with the intermediate product while shearing and stirring until the pH value of the solution is between 9 and 9.5, and the titration is stopped to obtain the SC optimized modified regeneration agent; the volume ratio of the propylene carbonate to the concentrated sulfuric acid is (6-3):(5-2); the mass fraction of the concentrated sulfuric acid is 98%; the alkali solution is ammonia water or sodium hydroxide solution, the mass fraction of the ammonia water is 25%, and the mass fraction of the sodium hydroxide solution is 52.2%; the shear stirring temperature is 60°C, the shear stirring rate is 800r / min, and the shear stirring time is 15min; The mineral material is limestone crushed by a ball mill, and its particle size is 9.5mm to 13.2mm; The preparation method of the active agent is as follows: tall oil is dripped into concentrated sulfuric acid at a temperature of 35-45°C and a stirring speed of 500 r / min for a titration time of 1 hour, and then alkali solution is dripped. The reaction temperature during the alkali titration is 20-25°C, the stirring speed during the alkali titration is 200 r / min, and the titration is stopped when the pH value of the solution is between 9 and 9.5 to obtain the active agent. The volume ratio of the tall oil to the concentrated sulfuric acid is (5-3):(4-2); the mass fraction of the concentrated sulfuric acid is 98%; the alkali solution is ammonia water or sodium hydroxide solution, the mass fraction of the ammonia water is 25%, and the mass fraction of the sodium hydroxide solution is 52.2%. The preparation method of the stabilizer is as follows:

1. Add maleic anhydride and anthracene oil in a volume ratio of 1:1 into a reaction kettle, stir and react at a temperature of 105-115° C. and a stirring speed of 800 r / min for 15-20 minutes to obtain 9,10-dihydroanthracene-9,10-α,β-maleic anhydride; 2. Add 9,10-dihydroanthracene-9,10-α,β-maleic anhydride and 2,2,6,6-tetramethyl-4-piperidinol into a reaction kettle at a volume ratio of 1:1, and stir at a temperature of 80-105° C. and a stirring speed of 1000 r / min for 20-30 minutes to obtain 4-tetramethylpiperidinol monoester; 3. Mixing tetramethylpiperidinol mononitrate and a solution of sodium hydroxide and calcium chloride in a volume ratio of 1:3, stirring and reacting at a temperature of 50-70° C. and a stirring speed of 1000 r / min for 50-60 minutes, filtering, and drying the solid matter to obtain tetramethylpiperidinol mononitrate calcium salt, which is a stabilizer; The preparation method of the sodium hydroxide calcium chloride salt solution described in step 3 is: dissolving NaOH and calcium chloride in deionized water to obtain a sodium hydroxide calcium chloride salt solution, wherein the concentration of NaOH is 25% and the concentration of calcium chloride is 12%; The preparation method of the anti-aging agent is as follows: ①. Preparation of non-aqueous phase solution: Fully dissolving polystyrene, 4-nitroanisole and edible vegetable oil in dichloromethane, then adding acetone, and emulsifying with a high shear emulsifier at a speed of 5000 r / min for 20 to 25 minutes to obtain a non-aqueous phase solution; The weight ratio of the polystyrene, 4-nitroanisole and edible vegetable oil described in step ① is (5-7):(1-2):(90-100); The volume ratio of the polystyrene mass to dichloromethane described in step ① is (90g-110g):(170mL-180mL); The volume ratio of dichloromethane to acetone described in step ① is (6-7):(4-5); The edible vegetable oil described in step ① is olive oil; ②, prepare aqueous solution; dissolving polyvinyl alcohol in deionized water to obtain an aqueous phase solution; The mass fraction of polyvinyl alcohol in the aqueous solution in step ② is 2%; ③. At room temperature, the non-aqueous phase solution was dripped into the aqueous phase solution, and then emulsified at a speed of 5000 r / min for 1 hour using a high shear emulsifier, and then polyvinyl alcohol was added, and stirred at 40°C for 12 hours. Finally, the remaining dichloromethane was removed using a rotary evaporator at 50°C to obtain a solid substance; the solid substance was washed with distilled water 3 to 5 times, and then placed in an oven at a temperature of 50°C to obtain an anti-aging agent; The volume ratio of the non-aqueous phase solution, the aqueous phase solution and the polyvinyl alcohol in step ③ is (2-5):(6-9):(10-13).

2. The cold region road regeneration and repair material according to claim 1, characterized in that The waste asphalt pavement milling material is the surface layer milling material of the asphalt road, and the particle size thereof is 0.075mm-1mm.

3. The cold region road regeneration and repair material according to claim 1, characterized in that The preparation method of the plasticizer is as follows: ①Use a twin-screw extruder at a temperature of 320℃ and a rotation speed of 30r / min to extrude the rubber powder from waste tires to obtain liquid recycled rubber; ②, liquid recycled rubber and environmentally friendly aromatic oil are mixed in a mass ratio of 2:1 on a two-roll mill to prepare an intermediate product, and then the intermediate product is vulcanized on a flat vulcanizer to prepare a plasticizer; The vulcanization temperature in step ② is 145° C., and the vulcanization time is 90 seconds.

4. The method for preparing a cold region road surface regeneration and repairing material according to claim 1, characterized in that The preparation method is specifically completed according to the following steps:

1. Weighing ingredients: Weigh 40 to 60 parts of waste asphalt pavement milling materials, 10 to 15 parts of No. 90 base asphalt, 5 to 30 parts of SC optimized modified regeneration agent, 5 to 15 parts of mineral material, 4 to 20 parts of active agent, 2 to 10 parts of stabilizer, 2 to 8 parts of anti-aging agent, 2 to 10 parts of plasticizer and 10 to 20 parts of kerosene according to weight; 2. Add the SC optimized modified regeneration agent and waste asphalt pavement milling material into the reactor, stir at a temperature of 90℃~110℃ and a speed of 300r / min for 40min~45min, then add a quarter of No. 90 base asphalt and activator, stir at a temperature of 90℃~110℃ and a speed of 4800r / min for 50min~60min to obtain the first component mixture; 3. Place one-third of No. 90 base asphalt and stabilizer into a reactor, stir at a temperature of 50°C to 60°C and a rotation speed of 500 r / min for 15 minutes to 20 minutes to obtain a second component mixture; Fourth, heat the remaining No. 90 base asphalt to 140°C, then place it together with the plasticizer and anti-aging agent in a high-speed shearing device and circulate shearing for 10 to 20 minutes at a shear speed of 480 r / min to obtain a third component mixture; 5. Heat the first component mixture to 140℃~160℃ and pour it into the stirring equipment, then add kerosene, stir at high speed at 120℃~180℃ and 5000r / min for 10min~15min, then Add the second component mixture, continue stirring at 130°C to 160°C and a rotation speed of 5000r / min for 20min to 30min, finally add the third component mixture, stir at a temperature of 100°C to 150°C and a rotation speed of 5000r / min for 50min to 60min to obtain cold area pavement recycling repair material.

5. The method for preparing a cold region road regeneration and repair material according to claim 4, characterized in that The method for using the cold region pavement regeneration repair material is as follows: heating the cold region pavement regeneration repair material to 120° C., spreading it on the pavement, compacting and smoothing it, and completing the pavement repair after the cold region pavement regeneration repair material hardens.

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