Reclaimed material warm-mixing storage type repair material as well as preparation method and application thereof

Abstract

The invention relates to the technical field of road repair, in particular to a recycled material warm-mixing storage type repair material and a preparation method and application thereof, and the repair material comprises the following materials: a material 1, aggregate, natural aggregate and recycled aggregate; a material 2, a binding material and matrix asphalt, wherein the matrix asphalt is selected according to weather conditions and traffic loads of a project location; a material 3, an additive; the basic liquid is prepared from a surfactant, a solvent, a stabilizer and water; according to the scheme, natural aggregate and recycled aggregate are combined, so that the utilization rate of waste materials is increased; adaptive matrix asphalt is selected and modified according to different weather conditions, and various additives with high environmental adaptability are matched; corresponding preparation methods are formulated according to different construction environments, efficient construction in various complex environments is achieved, the performance of the repairing material is improved, the road maintenance cost is reduced, and the service life of a repaired pavement is prolonged.

Description

Technical Field

[0001] This invention relates to the field of road repair technology, and in particular to a recycled material warm-mix storage repair material, its preparation method, and its application. Background Technology

[0002] With the increase in traffic volume and the aging of roads, asphalt concrete and cement concrete pavements inevitably suffer from damage, potholes, and other defects.

[0003] Recycled warm-mix storage repair material is a new type of repair material used in the field of road repair. It is composed of aggregates, binders, additives and other components, and can be stored and used in different temperature environments.

[0004] Traditional repair materials have many shortcomings. Hot-mix asphalt mixtures require on-site heating, which not only consumes a lot of energy but also places high demands on the construction site and equipment. Moreover, they are greatly affected by the weather, making it difficult to carry out construction in severe weather conditions such as low temperatures, rain, and snow, which significantly limits the construction period. At the same time, the utilization rate of waste materials is low, resulting in resource waste and increased production costs.

[0005] To address this, this invention proposes a recycled warm-mix storage repair material, its preparation method, and its application. By combining natural aggregates with recycled aggregates, the utilization rate of waste materials is improved. Suitable base asphalt is selected and modified according to different climatic conditions, and various environmentally adaptable additives are added. Corresponding preparation methods are developed for different construction environments, enabling efficient construction in various complex environments, improving the performance of the repair material, reducing road maintenance costs, and extending the service life of the repaired pavement. Summary of the Invention

[0006] Technical problem to be solved: Hot-mix asphalt mixtures require on-site heating, which presents many inconveniences.

[0007] To address the shortcomings of existing technologies, this invention provides a recycled material warm-mix storage repair material, its preparation method, and its application, thereby solving the technical problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A recycled material warm-mix storage repair material, the repair material comprising the following materials:

[0010] Material 1: Aggregates, including natural and recycled aggregates;

[0011] Material 2, binder, base asphalt. The selection of base asphalt is based on the climate conditions and traffic load of the project site.

[0012] Material 3, Additives

[0013] Material 3.1, Base liquid, which consists of surfactant, solvent, stabilizer and water;

[0014] The surfactant is a blend of nonionic and anionic surfactants in a ratio of 2:1, with a total dosage of 8% of the base solution mass.

[0015] The solvent used is a 1:1 mixture of industrial ethanol and ethylene glycol, accounting for 40% of the total volume.

[0016] The stabilizer used is calcium lignosulfonate, with a dosage of 3%.

[0017] Materials 3.2, auxiliary solutions

[0018] Type A auxiliary solution: 40% ethylene glycol, 20% glycerol, 30% antifreeze, and 10% catalyst.

[0019] Type B auxiliary solution: 30% ethylene glycol, 15% glycerol, 25% antifreeze, 10% catalyst, and 20% plasticizer.

[0020] Type C auxiliary solution: 30% plasticizer, 20% catalyst, 15% stabilizer, and 35% solvent.

[0021] Type D auxiliary liquid consists of 25% high-temperature resistant agent, 20% retarder, 15% stabilizer, and 40% solvent.

[0022] Type E auxiliary liquid consists of 30% waterproofing agent, 25% quick-setting agent, 20% adhesive reinforcing agent, and 25% solvent.

[0023] In one possible implementation, the repair material is used in road maintenance.

[0024] In one possible implementation, a method for preparing a recycled material warm-mix storage repair material as described above includes the following steps:

[0025] Step 1: Preparation of base solution. Pour industrial ethanol and ethylene glycol into a reaction vessel, stir at 300 r / min for 10 minutes, mix thoroughly, add surfactant, continue stirring for 30 minutes, and after complete dissolution, add calcium lignosulfonate and stir for 15 minutes. While stirring, slowly add deionized water to adjust the concentration of base solution to the specified range, let stand to defoam, filter to remove impurities, and store in a sealed container.

[0026] Step 2, preparation of auxiliary solution

[0027] Step 2.1, Preparation of Type A A excipient: Weigh ethylene glycol and glycerol into a reactor equipped with a stirring and temperature control system. Stir at 450 rpm for 15 minutes to ensure thorough mixing. Then, under continuous stirring, slowly add the antifreeze over 10-15 minutes, and continue stirring for another 10 minutes after addition. Next, add the catalyst and maintain stirring for 30 minutes to promote complete reaction of all components. After the reaction is complete, turn off the heating device and turn on the cooling water circulation system to allow the reaction solution to cool naturally to room temperature. After cooling, filter through a 120-mesh stainless steel filter to remove impurities, unreacted particles, and flocculent matter. Store the filtered Type A excipient in a sealed plastic container at a temperature controlled at 0-10℃ to ensure stable excipient performance.

[0028] Step 2.2, Preparation of Type B Auxiliary Solution: Ethylene glycol and glycerol are added to the reactor and stirred at 400 rpm for 12 minutes; antifreeze is added and stirred for 15 minutes, then catalyst and plasticizer are added sequentially, and stirring is continued for 40 minutes, with the reaction temperature controlled at 50±3℃; after the reaction is completed, the heating is turned off, and the cooling water is turned on to cool the reaction solution to room temperature, and then filtered through a 100-mesh filter; the filtered Type B auxiliary solution is placed in a sealed container and stored at a temperature controlled at 5-15℃.

[0029] Step 2.3, Preparation of Type C auxiliary solution: Add solvent to the reaction vessel and stir at 350 r / min. Add plasticizer, catalyst, and stabilizer in sequence, stirring for 10 minutes after each addition. After all the additions are completed, stir for another 30 minutes. The reaction is carried out at room temperature (20±5℃). After the reaction is completed, allow it to cool naturally to room temperature and filter to remove insoluble matter. Store in a cool, dry place at a temperature not exceeding 25℃.

[0030] Step 2.4, D-type auxiliary liquid preparation process: Add DMSO to the reactor and stir at 380 r / min. Add the high-temperature resistant agent, retarder, and stabilizer in sequence, stirring for 12 minutes after each addition. After all the additions are completed, stir for 35 minutes. Control the reaction temperature at 30±3℃. After the reaction is completed, cool to room temperature and filter through a 110-mesh filter. Store in a dark, cool place at a temperature not exceeding 30℃.

[0031] Step 2.5, E-type auxiliary liquid preparation process: Add solvent to the reaction vessel and stir at 420 r / min. Add waterproofing agent, quick-setting agent and adhesive strengthening agent in sequence, stirring for 12 minutes after each addition. After all additions are completed, stir for 35 minutes. Control the reaction temperature at 25±3℃. After the reaction is completed, cool to room temperature and filter through a 120-mesh filter. Store in a sealed container.

[0032] Step 3: Preparation of Repair Material

[0033] Step 3.1: Prepare at room temperature. Mix the base liquid and type C auxiliary liquid in a 3:1 ratio. After stirring evenly, slowly add asphalt and stir at 500-600 r / min for 20 minutes. Then add aggregate and continue stirring for 5-8 minutes to make the asphalt evenly coat the aggregate particles and form a uniform repair material.

[0034] Step 3.2: Low-temperature preparation. Mix the preheated base liquid with type B auxiliary liquid at a ratio of 2:1, quickly add asphalt, and stir vigorously at 800-900 r / min for 30 minutes. Add recycled aggregate and continue stirring for 8-10 minutes.

[0035] Step 3.3: Preparation in an extremely low temperature environment. Mix the preheated base liquid and type A auxiliary liquid in a 1:1 ratio, add asphalt, and stir vigorously at 1000-1200 r / min for 40 minutes. Add recycled aggregate and continue stirring for 10-12 minutes to fully coat the aggregate with asphalt.

[0036] Step 3.4: High-temperature preparation. Mix the base liquid and type D auxiliary liquid in a 4:1 ratio, add asphalt, stir at 400-500 r / min for 15 minutes, add recycled aggregate, stir for 3-5 minutes to form a uniform repair material.

[0037] Step 3.5: Preparation in rainy weather. Select the appropriate type A, B, C or D auxiliary liquid according to the ambient temperature, mix it with the base liquid, then add type E auxiliary liquid, add the mixed additive and stir evenly, add recycled aggregate, stir for 5-8 minutes to ensure that the aggregate and asphalt are fully combined.

[0038] Beneficial effects compared to existing technologies:

[0039] 1. This solution utilizes natural and recycled aggregates, strictly controlling their various indicators. It also selects and modifies suitable base asphalt based on different climatic conditions, and incorporates various targeted additives to enhance the performance of the repair material. For example, the Marshall stability reaches 8.3 kN, indicating its ability to withstand significant vehicle loads while remaining stable; the residual stability after immersion is 92%, and the freeze-thaw splitting strength ratio reaches 89%, effectively resisting water damage and the effects of freeze-thaw cycles. These properties enable the repair material to maintain good performance in various environments, significantly extending the service life of the repaired pavement, reducing the frequency of repeated road repairs, lowering road maintenance costs, and improving road capacity and safety.

[0040] 2. This solution achieves broad environmental adaptability by developing corresponding preparation methods and using specific auxiliary liquids based on different construction environments (such as extremely low temperatures, low temperatures, normal temperatures, high temperatures, and rainy weather). In extremely low temperature environments, preheating the raw materials, vigorous mixing, and special storage methods ensure that the repair material can still be applied normally and maintain its performance at low temperatures. In rainy weather, adding type E auxiliary liquid allows for rapid paving and compaction, reducing the impact of rain. This enables the repair material to be applied smoothly in frigid regions, hot regions, and rainy seasons, breaking through the bottleneck of traditional repair materials being limited by weather and temperature, improving the flexibility and timeliness of road repair work, and ensuring that road defects can be repaired in a timely manner. Attached Figure Description

[0041] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Figure 1 This is a flowchart of the method steps of the present invention. Detailed Implementation

[0043] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention can also be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below.

[0044] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0045] Example:

[0046] Please refer to Figure 1 As shown in this embodiment, a method for preparing a recycled material warm-mix storage repair material is described. The repair material includes the following components:

[0047] 1. Aggregates

[0048] Aggregate is the key skeletal structure of repair material. This repair material uses natural aggregate and recycled aggregate.

[0049] Natural aggregates are selected from hard, wear-resistant and clean limestone or basalt; their compressive strength is not less than 80MPa and their Los Angeles abrasion value is not greater than 30%; higher compressive strength ensures that the repair material remains stable under vehicle load, while lower abrasion value can effectively extend the service life of the repair material.

[0050] Recycled aggregates are derived from waste asphalt concrete and cement concrete pavement, and are used after being crushed, screened, and washed. Their crushing value is no more than 35%, the content of needle-shaped and flaky particles is no more than 15%, and the mud content is strictly controlled below 1%. These limits are designed to ensure the physical properties of recycled aggregates and avoid adverse effects on the overall quality of repair materials.

[0051] 2. Binder

[0052] 2.1 Selection of Base Asphalt

[0053] The selection of base asphalt is based on the climate conditions and traffic load of the project site. In high-temperature areas (annual extreme maximum temperature ≥35℃), No. 70 asphalt is used, with a penetration (25℃, 100g, 5s) of 60-80 (0.1mm), a softening point ≥46℃, and a ductility (15℃) ≥100cm. The higher softening point ensures that the asphalt is not easy to soften and flow at high temperatures, and the greater ductility allows the asphalt to maintain good flexibility at low temperatures and prevent cracking. In low-temperature areas (annual extreme minimum temperature ≤-10℃), No. 90 asphalt is selected, with a penetration (25℃, 100g, 5s) of 80-100 (0.1mm), a softening point ≥42℃, and a ductility (15℃) ≥100cm. It also needs to have good anti-aging properties to adapt to the shrinkage and deformation of the road surface in low-temperature environments.

[0054] 2.2 Asphalt Modification

[0055] To improve the performance of the binder, rubber powder or SBS is used to modify the base asphalt;

[0056] In rubber powder modified asphalt, the amount of rubber powder is 15%-20% of the asphalt mass; the rubber powder is evenly dispersed in the asphalt by shearing at 180-200℃ for 45-60 minutes using a high-speed shearing machine, thereby improving the elasticity, toughness and fatigue resistance of the asphalt.

[0057] In SBS modified asphalt, the SBS content is 4%-5% of the asphalt mass, and the mixture is stirred and developed at 170-180℃ for no less than 2 hours. The addition of SBS significantly improves the high-temperature stability, low-temperature crack resistance and fatigue resistance of asphalt, enabling it to adapt to complex traffic and climatic conditions.

[0058] 3. Additives

[0059] 3.1 Base Fluid

[0060] The base solution consists of surfactants, solvents, stabilizers, and water;

[0061] The surfactant is a blend of nonionic and anionic surfactants in a 2:1 ratio, with a total dosage of 8% of the base liquid mass. This blending method can effectively reduce the surface tension of asphalt and enhance the adhesion between asphalt and aggregates.

[0062] The solvent is a 1:1 mixture of industrial ethanol and ethylene glycol, accounting for 40% of the total volume; its function is to dilute the asphalt and dissolve the additives, promoting uniform mixing of the components.

[0063] The stabilizer used is calcium lignosulfonate, with a dosage of 3%. Calcium lignosulfonate can improve the stability of the base solution and prevent component separation or precipitation.

[0064] The remainder is deionized water. Using deionized water can prevent impurities from affecting the performance of the base fluid.

[0065] 3.2, Auxiliary solution

[0066]

[0067]

[0068] Based on the above, a method for preparing a recycled material warm-mix storage repair material is provided below, the method comprising the following steps:

[0069] Step 1: Preparation of base solution

[0070] Step 1.1, Raw material weighing: Accurately weigh the surfactant, solvent, stabilizer and deionized water according to the formula, using a high-precision electronic scale, with the error controlled within ±0.5%, to ensure the stability of the base liquid performance;

[0071] Step 1.2, Solvent mixing: Pour industrial ethanol and ethylene glycol into the reaction vessel, turn on the stirrer, set the speed to 300 r / min, and stir for 10 minutes to ensure that the two solvents are fully mixed;

[0072] Step 1.3, Surfactant addition: Slowly add the surfactant and stir continuously for 30 minutes to ensure that it is completely dissolved and evenly dispersed in the solution;

[0073] Step 1.4, Adding stabilizer: Add calcium lignosulfonate and continue stirring for 15 minutes to ensure even distribution of the stabilizer and improve the stability of the base solution;

[0074] Step 1.5, dilution with water: Slowly add deionized water while stirring to adjust the concentration of the base solution to the specified range; after stirring for 20 minutes, let it stand to defoam, filter to remove impurities, and store in a sealed container;

[0075] Step 2, preparation of auxiliary solution

[0076] Step 2.1, Preparation process of type A auxiliary solution

[0077] Raw material preparation: Industrial grade ethylene glycol (purity ≥99.5%) and food grade glycerol are selected and weighed accurately using an electronic scale, with the error controlled within ±0.3%; the antifreeze (methanol and urea in a mass ratio of 7:3) is thoroughly stirred before use; the catalyst (organometallic salt) is checked for shelf life and properties before use.

[0078] Mixing reaction: Weigh out ethylene glycol and glycerol and add them to a reaction vessel equipped with a stirring and temperature control system. Set the stirring speed to 450 r / min and the temperature to 55±2℃. Stir for 15 minutes to ensure thorough mixing. Then, under continuous stirring, slowly add the antifreeze over 10-15 minutes. After the addition is complete, continue stirring for 10 minutes. Then add the catalyst and maintain stirring for 30 minutes to promote the full reaction of the components.

[0079] Cooling and filtration: After the reaction is complete, turn off the heating device and turn on the cooling water circulation system to allow the reaction solution to cool naturally to room temperature; after cooling, filter through a 120-mesh stainless steel filter to remove impurities, unreacted particles and flocculent matter.

[0080] Storage: Pour the filtered Type A excipient into a sealed plastic container and store it at a temperature of 0-10℃ to ensure the stability of the excipient's performance.

[0081] Step 2.2, Preparation process of type B auxiliary solution

[0082] Raw material preparation: Accurately weigh 30% industrial grade ethylene glycol and 15% food grade glycerol, with an error within ±0.3%; stir the antifreeze (methanol and ethylene glycol in a mass ratio of 6:4) evenly, weigh 10% of the catalyst (same as the A-type auxiliary liquid), and select dioctyl phthalate (DOP) with a purity ≥99% as the plasticizer;

[0083] Mixed reaction: Add ethylene glycol and glycerol to the reactor and stir at 400 r / min for 12 minutes; add antifreeze and stir for 15 minutes; then add catalyst and plasticizer in sequence and continue stirring for 40 minutes. The reaction temperature is controlled at 50±3℃.

[0084] Cooling and filtration: After the reaction is complete, turn off the heating and turn on the cooling water to cool the reaction solution to room temperature, then filter it through a 100-mesh filter.

[0085] Storage: After filtration, type B excipients should be placed in a sealed container and stored at a temperature of 5-15℃.

[0086] Step 2.3, Preparation process of type C auxiliary solution

[0087] Raw material preparation: Prepare 30% epoxidized soybean oil plasticizer, inorganic acid catalyst (check purity and activity), polyacrylamide stabilizer with a molecular weight of 8-10 million, and a mixed solvent of industrial ethanol and water in a volume ratio of 7:3 (mix evenly).

[0088] Mixed reaction: Add solvent to reaction vessel and stir at 350 r / min. Add plasticizer, catalyst and stabilizer in sequence, stirring for 10 minutes after each addition. After all the additions are completed, stir for another 30 minutes. The reaction is carried out at room temperature (20±5℃).

[0089] Cooling and filtration: After the reaction is complete, allow the mixture to cool naturally to room temperature and then filter to remove insoluble matter.

[0090] Storage: Store in a cool, dry place at a temperature not exceeding 25°C;

[0091] Step 2.4, Preparation process of type D auxiliary solution

[0092] Raw material preparation: Weigh out the following: a high-temperature resistant agent with a mass ratio of nano-titanium dioxide to silane coupling agent of 8:2, a retarder with a mass ratio of citric acid to sodium gluconate of 3:2 and accounting for 20%, a polyacrylamide stabilizer, and a high-boiling-point dimethyl sulfoxide (DMSO) solvent (check purity and boiling point).

[0093] Mixing reaction: Add DMSO to the reactor and stir at 380 r / min. Add the high temperature resistant agent, retarder, and stabilizer in sequence, stirring for 12 minutes after each addition. After all the additions are completed, stir for 35 minutes. The reaction temperature is controlled at 30±3℃.

[0094] Cooling and filtration: After the reaction is complete, cool to room temperature and filter through a 110-mesh filter.

[0095] Storage: Store in a cool, dark place at a temperature not exceeding 30°C;

[0096] Step 2.5, Preparation process of type E auxiliary solution

[0097] Raw material preparation: Select an organosilicon waterproofing agent with an effective ingredient content of ≥30%, an aluminate quick-setting agent (small-scale test to determine the effect), an epoxy resin emulsion adhesive reinforcing agent with a solid content of 40-50%, and a mixed solvent of acetone and ethanol in a volume ratio of 4:6 (mixed evenly).

[0098] Mixing reaction: Add solvent to reaction vessel and stir at 420 r / min. Add waterproofing agent, quick-setting agent and adhesive strengthening agent in sequence. Stir for 12 minutes after each addition. After all additions are completed, stir for 35 minutes. Control the reaction temperature at 25±3℃.

[0099] Cooling and filtration: After the reaction is complete, cool to room temperature and filter through a 120-mesh filter.

[0100] Storage: Store in a sealed container to prevent moisture absorption;

[0101] Step 3: Preparation of Repair Material

[0102] Step 3.1: Preparation at room temperature (0℃-25℃)

[0103] Asphalt heating: Heat the base asphalt or modified asphalt to 130-140℃ to give it good fluidity. Stir constantly during the heating process to prevent local overheating.

[0104] Additive mixing: Mix the base liquid and type C auxiliary liquid in a 3:1 ratio, stir evenly, and slowly add it to the heated asphalt. Stir at 500-600 r / min for 20 minutes, at which point the asphalt temperature drops to 80-90℃.

[0105] Aggregate addition: Add the pretreated aggregate and continue stirring for 5-8 minutes to ensure that the asphalt evenly coats the aggregate particles and forms a uniform repair material;

[0106] Discharge and storage: Discharge the prepared repair material into a sealed storage tank. The storage temperature should be controlled at 10-20℃. Stir for 5 minutes every 2 hours during storage to prevent segregation.

[0107] Step 3.2: Preparation in a low-temperature environment (-20℃ to 0℃)

[0108] Material preheating: Heat the base asphalt to 140-150℃, preheat the base liquid and type B auxiliary liquid to 40-50℃, and preheat the recycled aggregate to 50-60℃;

[0109] Additive mixing: Mix the preheated base liquid with type B auxiliary liquid in a 2:1 ratio, quickly add it to the heated asphalt, and stir vigorously at 800-900 r / min for 30 minutes until the asphalt temperature drops to 90-100℃.

[0110] Aggregate mixing: Add recycled aggregate and continue mixing for 8-10 minutes to ensure that the aggregate and asphalt are fully mixed.

[0111] Insulated storage: After discharge, the material is immediately loaded into a double-layer insulated storage tank. The outside of the tank is wrapped with insulation cotton, and a heating device is installed inside to maintain the temperature at 20-30℃.

[0112] Step 3.3: Preparation in an extremely low temperature environment (-20℃ and below)

[0113] Material heating: Heat the base asphalt to 150-160℃, preheat the base liquid to 50-60℃, preheat the type A auxiliary liquid to 60-70℃, and preheat the recycled aggregate to 60-70℃;

[0114] Additive mixing: Mix the preheated base liquid with type A auxiliary liquid in a 1:1 ratio, quickly add it to the high-temperature asphalt, and stir vigorously at 1000-1200r / min for 40 minutes until the asphalt temperature drops to 100-110℃.

[0115] Aggregate mixing: Add recycled aggregate and stir continuously for 10-12 minutes to ensure that the aggregate and asphalt are fully coated;

[0116] Special storage: After discharge, the material is placed in a special insulated container filled with nitrogen to prevent oxidation. The external liquid nitrogen refrigeration system maintains the temperature at -10 to 0℃. Before use, the temperature needs to be slowly raised to the appropriate construction temperature.

[0117] Step 3.4: Preparation in a high-temperature environment (25℃-40℃)

[0118] Asphalt heating: Heat the base asphalt to 120-130℃;

[0119] Additive mixing: Mix the base liquid and type D auxiliary liquid in a 4:1 ratio, add it to the asphalt, and stir at 400-500 r / min for 15 minutes until the asphalt temperature drops to 70-80℃.

[0120] Aggregate mixing: Add recycled aggregate and mix for 3-5 minutes to form a uniform repair material;

[0121] Cool storage: After discharge, store in a cool, ventilated warehouse, away from direct sunlight, and keep the storage temperature below 30°C;

[0122] Step 3.5, Preparation for Rainy Weather

[0123] Material preparation: Select the appropriate type A, B, C or D auxiliary solution according to the ambient temperature, mix it with the base solution, and then add type E auxiliary solution (accounting for 25% of the total amount of additives).

[0124] Asphalt treatment: Heat the asphalt according to the corresponding temperature range process, add the mixed additives and stir evenly;

[0125] Aggregate addition: Add recycled aggregate and stir for 5-8 minutes to ensure that the aggregate and asphalt are fully combined;

[0126] Rapid construction: The prepared repair material must be spread and compacted within 30 minutes to avoid rainwater affecting its performance;

[0127] Based on the above, the following is an application of recycled material warm-mix storage repair material:

[0128] 1. Construction process

[0129] Step 1: Treatment of the damage. Clean the loose material in the pit and use a cutting machine to trim the edge of the pit to make it vertical with a depth of not less than 5cm.

[0130] Step 2, Interface treatment: Spray emulsified asphalt or tack coat oil on the bottom and sidewalls of the pit at a rate of 0.3-0.5 kg / m² to enhance the adhesion between the new and old materials.

[0131] Step 3: Spread and compact. Pour the prepared repair material into the pothole, level it with a scraper, and compact it in layers using a small vibratory roller or plate compactor. Each layer should not exceed 5cm in thickness and the compaction degree should not be less than 95%.

[0132] Step 4: Curing treatment. Curing time is 2-4 hours at room temperature, and the curing time is extended appropriately at low temperature. Traffic can be opened after the repair material reaches the required strength.

[0133] 2. Finished product performance test results

[0134]

[0135]

[0136] In summary, the performance test results of the finished product demonstrate the significant advantages of this embodiment. The Marshall stability reaches 8.3 kN, and the flow value is 30.6, indicating that the repair material remains stable and is not easily deformed under load. A porosity of 5.2%, residual stability after immersion in water of 92%, and a freeze-thaw splitting strength ratio of 89% indicate excellent waterproof performance, maintaining good performance under water and freeze-thaw conditions, effectively resisting water damage. The low-temperature bending test shows a bending strain of 2563 με at -10℃, demonstrating good flexibility and resistance to cracking in low-temperature environments. These excellent properties fully demonstrate that the repair material prepared by this embodiment can adapt to various complex environments, effectively improve the quality of road repairs, and extend the service life of the repaired pavement.

[0137] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A recycled material warm-mix storage repair material, characterized in that, The repair material Includes the following materials: Material 1: Aggregates, including natural and recycled aggregates; Material 2, binder, base asphalt. The selection of base asphalt is based on the climate conditions and traffic load of the project site. Material 3, Additives Material 3.1, Base liquid, which consists of surfactant, solvent, stabilizer and water; The surfactant is a blend of nonionic and anionic surfactants in a ratio of 2:1, with a total dosage of 8% of the base solution mass. The solvent used is a 1:1 mixture of industrial ethanol and ethylene glycol, accounting for 40% of the total volume. The stabilizer used is calcium lignosulfonate, with a dosage of 3%. Materials 3.2, auxiliary solutions Type A auxiliary solution: 40% ethylene glycol, 20% glycerol, 30% antifreeze, and 10% catalyst. Type B auxiliary solution: 30% ethylene glycol, 15% glycerol, 25% antifreeze, 10% catalyst, and 20% plasticizer. Type C auxiliary solution: 30% plasticizer, 20% catalyst, 15% stabilizer, and 35% solvent. Type D auxiliary liquid consists of 25% high-temperature resistant agent, 20% retarder, 15% stabilizer, and 40% solvent. Type E auxiliary liquid consists of 30% waterproofing agent, 25% quick-setting agent, 20% adhesive reinforcing agent, and 25% solvent.

2. The recycled material warm-mix storage repair material as described in claim 1, characterized in that, The application of the repair material in road maintenance.

3. A method for preparing a recycled material warm-mix storage repair material as described in claim 1, characterized in that, The method includes the following steps: Step 1: Preparation of base solution. Pour industrial ethanol and ethylene glycol into a reaction vessel, stir at 300 r / min for 10 minutes, mix thoroughly, add surfactant, continue stirring for 30 minutes, and after complete dissolution, add calcium lignosulfonate and stir for 15 minutes. While stirring, slowly add deionized water to adjust the concentration of base solution to the specified range, let stand to defoam, filter to remove impurities, and store in a sealed container. Step 2, preparation of auxiliary solution Step 2.1, Preparation of Type A A excipient: Weigh ethylene glycol and glycerol into a reactor equipped with a stirring and temperature control system. Stir at 450 rpm for 15 minutes to ensure thorough mixing. Then, under continuous stirring, slowly add the antifreeze over 10-15 minutes, and continue stirring for another 10 minutes after addition. Next, add the catalyst and maintain stirring for 30 minutes to promote complete reaction of all components. After the reaction is complete, turn off the heating device and turn on the cooling water circulation system to allow the reaction solution to cool naturally to room temperature. After cooling, filter through a 120-mesh stainless steel filter to remove impurities, unreacted particles, and flocculent matter. Store the filtered Type A excipient in a sealed plastic container at a temperature controlled at 0-10℃ to ensure stable excipient performance. Step 2.2, Preparation of Type B Auxiliary Solution: Ethylene glycol and glycerol are added to the reactor and stirred at 400 rpm for 12 minutes; antifreeze is added and stirred for 15 minutes, then catalyst and plasticizer are added sequentially, and stirring is continued for 40 minutes, with the reaction temperature controlled at 50±3℃; after the reaction is completed, the heating is turned off, and the cooling water is turned on to cool the reaction solution to room temperature, and then filtered through a 100-mesh filter; the filtered Type B auxiliary solution is placed in a sealed container and stored at a temperature controlled at 5-15℃. Step 2.3, Preparation of Type C auxiliary solution: Add solvent to the reaction vessel and stir at 350 r / min. Add plasticizer, catalyst, and stabilizer in sequence, stirring for 10 minutes after each addition. After all the additions are completed, stir for another 30 minutes. The reaction is carried out at room temperature (20±5℃). After the reaction is completed, allow it to cool naturally to room temperature and filter to remove insoluble matter. Store in a cool, dry place at a temperature not exceeding 25℃. Step 2.4, D-type auxiliary liquid preparation process: Add DMSO to the reactor and stir at 380 r / min. Add the high-temperature resistant agent, retarder, and stabilizer in sequence, stirring for 12 minutes after each addition. After all the additions are completed, stir for 35 minutes. Control the reaction temperature at 30±3℃. After the reaction is completed, cool to room temperature and filter through a 110-mesh filter. Store in a dark, cool place at a temperature not exceeding 30℃. Step 2.5, E-type auxiliary liquid preparation process: Add solvent to the reaction vessel and stir at 420 r / min. Add waterproofing agent, quick-setting agent and adhesive strengthening agent in sequence, stirring for 12 minutes after each addition. After all additions are completed, stir for 35 minutes. Control the reaction temperature at 25±3℃. After the reaction is completed, cool to room temperature and filter through a 120-mesh filter. Store in a sealed container. Step 3: Preparation of Repair Material Step 3.1: Prepare at room temperature. Mix the base liquid and type C auxiliary liquid in a 3:1 ratio. After stirring evenly, slowly add asphalt and stir at 500-600 r / min for 20 minutes. Then add aggregate and continue stirring for 5-8 minutes to make the asphalt evenly coat the aggregate particles and form a uniform repair material. Step 3.2: Low-temperature preparation. Mix the preheated base liquid with type B auxiliary liquid at a ratio of 2:1, quickly add asphalt, and stir vigorously at 800-900 r / min for 30 minutes. Add recycled aggregate and continue stirring for 8-10 minutes. Step 3.3: Preparation in an extremely low temperature environment. Mix the preheated base liquid and type A auxiliary liquid in a 1:1 ratio, add asphalt, and stir vigorously at 1000-1200 r / min for 40 minutes. Add recycled aggregate and continue stirring for 10-12 minutes to fully coat the aggregate with asphalt. Step 3.4: High-temperature preparation. Mix the base liquid and type D auxiliary liquid in a 4:1 ratio, add asphalt, stir at 400-500 r / min for 15 minutes, add recycled aggregate, stir for 3-5 minutes to form a uniform repair material. Step 3.5: Preparation in rainy weather. Select the appropriate type A, B, C or D auxiliary liquid according to the ambient temperature, mix it with the base liquid, then add type E auxiliary liquid, add the mixed additive and stir evenly, add recycled aggregate, stir for 5-8 minutes to ensure that the aggregate and asphalt are fully combined.

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