Non-volatile room-temperature modified asphalt binder, non-volatile room-temperature recycled asphalt mixture containing the same, and method for repairing potholes and cracks using the same.

Abstract

This disclosure relates to a non-volatile room-temperature modified asphalt binder, a non-volatile room-temperature recycled asphalt mixture containing the same, and a method for repairing potholes and cracks using the same. [Solution] A non-volatile, room-temperature recycled asphalt mixture according to one embodiment has the advantages of improved fluidity, prevention of conventional asphalt cracking, improved peeling, and enhanced thermal stability.

Description

Technical Field

[0001] The present disclosure relates to a non-volatile room-temperature modified asphalt binder, a non-volatile room-temperature recycled asphalt mixture containing the same, and a method for repairing potholes and cracks using the same.

Background Art

[0002] More than 90% of the road pavements in South Korea are concrete or asphalt pavements. However, with the increase in traffic volume and heavy vehicles, the durability and service life have been significantly reduced due to plastic deformation and cracks in the roads. Due to local heavy rain, heavy snow, global warming, etc., the paved roads and sidewalks are placed in a much more deteriorated environment than in the past, such as temperature rise of the road surface, increased use of calcium chloride, and the damage such as cracks, breakage, and abrasion is accelerating.

[0003] To repair concrete or asphalt pavements, there are an overlay method and a full and partial cutting overlay method. However, due to the generation and treatment of waste by the crushing and cutting of conventional road surfaces, environmental problems and the problem of increased treatment costs occur.

[0004] In addition to the overlay method and the cutting overlay method, a room-temperature asphalt mixture is used to repair asphalt-paved roads. Currently, as a binder for the room-temperature asphalt mixture, cut-back asphalt containing a volatile solvent or emulsified asphalt obtained by modifying asphalt with an emulsifier is mainly used. Specific examples of the room-temperature asphalt mixture are as follows (a) to (e).

[0005] (a) A room-temperature asphalt mixture using an inorganic binder such as cement, fly ash, blast furnace slag fine powder, limestone, and early curing material in emulsified asphalt, modified emulsified asphalt binder (cationic, anionic, etc.) or cut-back asphalt (b) Room temperature asphalt mixture using emulsified asphalt, modified emulsified asphalt binder (cationic, anionic, water vaporization type, etc.), polymeric modifiers such as EVA, acrylic polymer, polyvinyl acetate, and acrylic emulsion, surfactants, and binders. (h) Room-temperature recycled asphalt mixture produced by mixing recycled aggregate with emulsified asphalt or modified emulsified asphalt binder using modifying additives, recycled additives (vegetable oil, base oil, emulsion, unheated oil-in-water droplet type, etc.) and fiber additives. (ii) A room-temperature asphalt mixture for which a polymer-based binder (polyurethane, aqueous polyacrylic binder, etc.) is manufactured and mixed with aggregate. (e) Cold asphalt binders manufactured by mixing straight asphalt, solvents, petroleum resins, colorants, crosslinking accelerators, etc., and cold asphalt mixtures using the same.

[0006] The problems with conventional cold-temperature asphalt binders or cold-temperature asphalt mixtures, as described above, are as follows:

[0007] (1) Problems with emulsified asphalt or modified emulsified asphalt-based cold asphalt Emulsified asphalt refers to asphalt to which an emulsifier has been added to prevent phase separation in water and maintain a dispersed state. Because water is added to maintain the liquid phase of asphalt, which is semi-solid at room temperature, its physical properties (penetration, softening point, peel resistance, water resistance, elongation, etc.) are reduced compared to straight asphalt.

[0008] To overcome the aforementioned disadvantages of general emulsion asphalt, modified emulsion asphalt is manufactured and used by adding latex and rubber-based modifiers. While modified emulsion asphalt complements general emulsion asphalt in many ways, it does not meet the fundamental physical properties of asphalt binders. In other words, room-temperature asphalt mixtures using emulsion asphalt or modified emulsion asphalt do not excel in mechanical properties such as Marshall stability, peel resistance, and indirect tensile strength.

[0009] To improve the strength properties of emulsified asphalt and modified emulsified asphalt, inorganic binders are used in their mixture. While this offers advantages in terms of strength, it reduces the inherent flexibility of asphalt, making it highly susceptible to fatigue and low-temperature cracking, requiring continuous repairs. Furthermore, the use of inorganic binders such as cement presents a structural problem: waste asphalt cannot be reused during milling for repaving.

[0010] (2) Problems with cutback asphalt-type cold asphalt Asphalt cement, which is semi-solid at room temperature, is mixed with a volatile petroleum solvent to create a liquid state that can be used at room temperature without heating. This liquid state is called cutback asphalt. Depending on the solvent mixed, cutback asphalt evaporates, dries, and hardens at different rates, and is classified into rapid curing (RC), medium curing (MC), and slow curing (SC). Common solvents used in cutback asphalt include gasoline, kerosene, and diesel fuel. Because cutback asphalt uses volatile solvents, the mechanical properties of the asphalt are reduced by the non-volatile solvents. In particular, the use of volatile solvents makes storage stability and long-term storage very weak. Hardening occurs frequently during storage due to the evaporation of volatile solvents, rendering the product unusable.

[0011] (3) Problems with polymer-based room-temperature asphalt The use of high-molecular-weight polymers results in superior mechanical properties compared to emulsified asphalt-based cold asphalt. However, the high tackiness and moisture sensitivity of the polymers make storage stability and long-term storage very poor. If moisture is present in the aggregate, it delays the hardening of the polymers, significantly reducing strength. Furthermore, when applied to asphalt repair sections exposed to a moist environment, its use is severely restricted due to the unhardened reaction caused by water. In addition, it is greatly affected by temperature during application, and becomes unusable when winter temperatures drop. Considering that cold asphalt is primarily used in rainy weather and winter, high-molecular-weight polymer-based cold asphalt is unsuitable for cold asphalt applications.

[0012] (4) Cold asphalt binders and mixtures manufactured using solvents with straight asphalt (same as cutback asphalt) This is a type of cutback asphalt that uses a solvent to give straight asphalt fluidity at room temperature. This binder and mixture has the same problems as the cutback asphalt-based room-temperature asphalt mixture described in (2) above. [Overview of the project] [Problems that the invention aims to solve]

[0013] One embodiment aims to provide a non-volatile room-temperature modified asphalt binder comprising petroleum asphalt, natural asphalt, polymer modifier, process oil, adhesion enhancer, crack inhibitor, water-repellent additive, carboxymethylcellulose, and carbon nanotubes.

[0014] Another embodiment aims to provide a non-volatile room-temperature recycled asphalt mixture comprising the non-volatile room-temperature modified asphalt binder, recycled aggregate, filler, and graphene.

[0015] Another embodiment aims to provide a non-volatile, room-temperature recycled asphalt pouch manufactured by placing the non-volatile, room-temperature recycled asphalt mixture into a packaging container.

[0016] Another embodiment aims to provide a method for repairing potholes and cracks, which includes the steps of: automatically detecting potholes and cracks while operating a road repair vehicle; filling the automatically detected potholes and cracks with a non-volatile, room-temperature recycled asphalt pouch; and flattening the potholes and cracks by bonding with the non-volatile, room-temperature recycled asphalt pouch due to the tire pressure of a moving vehicle. [Means for solving the problem]

[0017] One embodiment comprises: a) 0.1 to 30% by weight of one or more petroleum asphalts selected from straight asphalt or blown asphalt; b) 0.1 to 30% by weight of one or more natural asphalts selected from gilsonite, glanspitch, and grahamite; c) 0.1 to 15% by weight of a rubber modification compound (RMC) polymer modifier, which is a vinyl aromatic hydrocarbon-conjugated diene block copolymer using one or more of styrene-butadiene block copolymer (SBS), styrene-isoprene block copolymer (SIS), and styrene-ethylene-butylene block copolymer (SEBS); and d) one or more process oils selected from paraffin oil, naphthenic oil, aromatic oil, natural oil, and mineral oil. The present invention provides a non-volatile room-temperature modified asphalt binder comprising: 20-50% by weight of yl; 0.5-30% by weight of one or more adhesion enhancers selected from rosin ester, modified acrylic, modified silicone, polyvinyl ester, and silicone resin types; 2-5% by weight of one or more crack inhibitors selected from polypropylene glycol and polyethylene glycol; 0.2-0.5% by weight of one or more water-repellent additives selected from siloxane and silicone oil; 0.1-1% by weight of carboxymethylcellulose having a degree of carboxylation of 0.5-1 and a Brookfield viscosity of 3000-4000 cps at 25°C; and 0.1-0.5% by weight of carbon nanotubes.

[0018] Another embodiment provides a non-volatile room-temperature recycled asphalt mixture comprising 1-3% by weight of the non-volatile room-temperature modified asphalt binder, 93-97% by weight of recycled aggregate, 2-4% by weight of filler, and 0.5-2% by weight of graphene.

[0019] In one embodiment, the non-volatile room-temperature recycled asphalt mixture can be applied to sidewalks, bicycle paths, or walking paths.

[0020] In one embodiment, the non-volatile room-temperature recycled asphalt mixture can be mixed and manufactured at room temperature.

[0021] Another embodiment provides a non-volatile normal-temperature regenerated asphalt pouch produced by putting the non-volatile normal-temperature regenerated asphalt mixture into a packaging container, and the non-volatile normal-temperature regenerated asphalt pouch can be put into potholes and cracks.

[0022] In one embodiment, after the non-volatile normal-temperature regenerated asphalt pouch is put into potholes and cracks, it can be pressurized by the tires of passing vehicles and filled into potholes and cracks.

[0023] In one embodiment, putting the non-volatile normal-temperature regenerated asphalt pouch into the potholes and cracks can be done by putting non-volatile normal-temperature regenerated asphalt pouches of different sizes according to the sizes of the potholes and cracks while the vehicle is moving.

[0024] In one embodiment, the packaging container can be made of stretchable fabric.

[0025] In one embodiment, the stretchable fabric can include any one or more selected from the group consisting of polyurethane, polyethylene, high-density polyethylene, nylon, and spandex.

[0026] Still another embodiment provides a method for repairing potholes and cracks, including the steps of automatically detecting potholes and cracks while operating a road repair vehicle, putting a non-volatile normal-temperature regenerated asphalt pouch into the automatically detected potholes and cracks, and flattening the potholes and cracks by adhering to the non-volatile normal-temperature regenerated asphalt pouch under the tire pressure of vehicles moving on the road.

[0027] In one embodiment, the step of putting the non-volatile normal-temperature regenerated asphalt pouch can be done by putting non-volatile normal-temperature regenerated asphalt pouches of different sizes according to the sizes of the potholes and cracks.

[0028] In one embodiment, the step of introducing the non-volatile, room-temperature recycled asphalt pouch can be performed automatically by a sensor or manually, but is not necessarily limited to these methods.

[0029] In one embodiment, the sensor may, but is not limited to, a robot. [Effects of the Invention]

[0030] This disclosure relates to a non-volatile room-temperature modified asphalt binder, a non-volatile room-temperature recycled asphalt mixture containing the same, and a method for repairing potholes and cracks using the same. In one embodiment, the non-volatile room-temperature modified asphalt binder contains polyalkylene glycol such as polypropylene glycol or polyethylene glycol and carbon nanotubes. Therefore, in one embodiment, the non-volatile room-temperature recycled asphalt mixture containing the same has the advantages of improved fluidity, prevention of conventional asphalt cracking, improved delamination, and improved thermal stability. [Modes for carrying out the invention]

[0031] The embodiments described herein can be modified into various other forms, so the technology of one embodiment is not limited to the embodiments described below. Furthermore, throughout this specification, the terms "comprising," "including," "containing," "having," or "having" a component mean, unless otherwise specifically stated to the contrary, that it may further include other components rather than excluding other components, and do not exclude any other elements, materials, or processes not listed.

[0032] Numerical ranges as used herein include lower and upper limits, all values ​​within those limits, increments logically derived from the form and width of the defined range, all double-limited values, and all possible combinations of upper and lower limits of numerical ranges limited in different forms. For example, if the composition content is limited to 10% to 80% or 20% to 50%, the numerical ranges of 10% to 50% or 50% to 80% should also be interpreted as being included herein. Unless otherwise specifically defined herein, values ​​outside the defined numerical range that may arise due to experimental error or rounding of values ​​are also included in the defined numerical range.

[0033] Hereafter, unless otherwise defined in this specification, “about” may be considered as a value within 30%, 25%, 20%, 15%, 10%, 5%, 3%, 2%, 1%, or 0.5% of the expressed value.

[0034] The present disclosure will be described in detail below (with reference to the attached drawings). However, this is illustrative only, and the present disclosure is not limited to the specific embodiments described illustratively.

[0035] One embodiment comprises: a) 0.1 to 30% by weight of one or more petroleum asphalts selected from straight asphalt or blown asphalt; b) 0.1 to 30% by weight of one or more natural asphalts selected from gilsonite, glanspitch, and grahamite; c) 0.1 to 15% by weight of a rubber modification compound (RMC) polymer modifier, which is a vinyl aromatic hydrocarbon-conjugated diene block copolymer using one or more of styrene-butadiene block copolymer (SBS), styrene-isoprene block copolymer (SIS), and styrene-ethylene-butylene block copolymer (SEBS); and d) one or more process oils selected from paraffin oil, naphthenic oil, aromatic oil, natural oil, and mineral oil. The present invention provides a non-volatile room-temperature modified asphalt binder comprising: 20-50% by weight of yl; 0.5-30% by weight of one or more adhesion enhancers selected from rosin ester, modified acrylic, modified silicone, polyvinyl ester, and silicone resin types; 2-5% by weight of one or more crack inhibitors selected from polypropylene glycol and polyethylene glycol; 0.2-0.5% by weight of one or more water-repellent additives selected from siloxane and silicone oil; 0.1-1% by weight of carboxymethylcellulose having a degree of carboxylation of 0.5-1 and a Brookfield viscosity of 3000-4000 cps at 25°C; and 0.1-0.5% by weight of carbon nanotubes.

[0036] In one embodiment, the petroleum asphalt and natural asphalt are used as the main components of a non-volatile room-temperature modified asphalt binder to impart the inherent flexibility properties of asphalt. By adding and mixing them with polymer modifiers, process oils, adhesion enhancers, crack inhibitors, and water-repellent additives, their mechanical properties, long-term storage capabilities, and stability can be improved.

[0037] In one embodiment, the petroleum asphalt refers to the asphalt remaining after distilling petroleum and extracting components with low boiling points such as gasoline, naphtha, and kerosene. The petroleum asphalt may be straight asphalt and / or blown asphalt, but is not necessarily limited to these. Petroleum asphalt becomes liquid at high temperatures and very hard at low temperatures, and its temperature sensitivity may differ depending on the type of asphalt. It also has high plasticity and can possess excellent waterproofing, electrical insulation, and adhesive properties, as well as chemical stability.

[0038] In one embodiment, the natural asphalt is also called asphaltite, which has a higher melting point than conventional asphalt. The natural asphalt may be one or more selected from the group consisting of gilsonite, gazen pitch, and grahamite, but is not necessarily limited to these. In particular, gilsonite has been produced for commercial purposes since 1885, consists of natural hydrocarbons, and can be composed of 71% asphaltene, 27% malatine, 3.2% nitrogen, and 0.3% sulfur, for example.

[0039] In one embodiment, by mixing petroleum asphalt and natural asphalt, deformation due to excessive softening of the binder at high summer temperatures can be prevented, and detachment due to reduced adhesion to the aggregate can be prevented. Petroleum asphalt and natural asphalt may each be used in amounts of 0.1 to 30% by weight relative to 100% by weight of non-volatile room-temperature modified asphalt binder, but are not necessarily limited to this. If petroleum asphalt and natural asphalt are used in amounts of less than 0.1% by weight each, the insufficient asphalt content in the non-volatile room-temperature modified asphalt binder will prevent the softening characteristic of asphalt pavement from occurring. Furthermore, if used in amounts exceeding 30% by weight, the viscosity of the non-volatile room-temperature modified asphalt binder will increase significantly, making it impossible to maintain a liquid phase state at room temperature. This not only makes the production of room-temperature asphalt difficult, but also reduces storage stability and storability after the production of room-temperature asphalt, potentially making long-term storage impossible.

[0040] In one embodiment, the polymer modifier is a rubber-modifying compound (RMC) polymer modifier which is a vinyl aromatic hydrocarbon-conjugated diene block copolymer, and the vinyl aromatic hydrocarbon-conjugated diene block copolymer may be one or more selected from the group consisting of styrene-butadiene block copolymer (SBS), styrene-isoprene block copolymer (SIS), and styrene-ethylene-butylene block copolymer (SEBS), but is not necessarily limited thereto.

[0041] In one embodiment, the polymer modifier may be 0.1 to 15% by weight relative to 100% by weight of the non-volatile room-temperature modified asphalt binder, but is not necessarily limited thereto. If less than 0.1% by weight of the polymer modifier is used, the modification effect is insufficient, and if it exceeds 15% by weight, the viscosity of the non-volatile room-temperature modified asphalt binder increases significantly at room temperature, making it impossible to maintain a liquid phase state at room temperature. This not only makes room-temperature production of the room-temperature recycled asphalt mixture impossible, but even after the production of the room-temperature recycled asphalt mixture, its high viscosity and self-adhesion may make long-term storage and on-site application at room temperature difficult.

[0042] In one embodiment, the process oil can reduce the viscosity of the binder and increase its adhesiveness so that the non-volatile room-temperature modified asphalt binder, which is semi-solid at room temperature, is mixed with the aggregate for use. Furthermore, the process oil can adsorb to the old asphalt binder contained in the asphalt aggregate, causing the asphalt binder to dissolve and impart expansion properties. In one embodiment, the process oil may be one or more selected from the group consisting of paraffin oil, naphthenic oil, aromatic oil, natural oil, and mineral oil, but is not necessarily limited thereto.

[0043] In one embodiment, the process oil may be 20 to 50% by weight relative to 100% by weight of the non-volatile room-temperature modified asphalt binder, but is not necessarily limited thereto. If less than 20% by weight of the process oil is used, the viscosity of the asphalt binder cannot be sufficiently reduced, the adhesiveness cannot be sufficiently increased, and the elution and expansion properties of the asphalt binder cannot be sufficiently provided. If more than 50% by weight is used, the viscosity of the asphalt binder becomes too low, which can cause the room-temperature asphalt to plastically deform or the binder to soften at high summer temperatures.

[0044] In one embodiment, the adhesion enhancer is used to increase the adhesion between aggregates or between aggregates and asphalt, prevent initial detachment, strengthen the bonding force, and increase the temperature sensitivity of the expandable binder component, thereby preventing plastic deformation and cracking due to temperature. In one embodiment, the adhesion enhancer may be one or more selected from the group consisting of rosin ester, modified acrylic, modified silicone, polyvinyl ester, and silicone resin, but is not necessarily limited thereto.

[0045] In one embodiment, the adhesion enhancer may be 0.5 to 30% by weight relative to 100% by weight of the non-volatile room-temperature modified asphalt binder, but is not necessarily limited thereto. If the adhesion enhancer is used at less than 0.5% by weight, the adhesion strength will not increase sufficiently, and if it is used at more than 30% by weight, the initial adhesion strength will increase, which may reduce workability when applied on-site due to adhesion between aggregates during storage.

[0046] In one embodiment, the crack inhibitor is added to a non-volatile room-temperature modified asphalt binder to weaken large intermolecular interactions within the asphalt, thereby improving low-temperature fluidity. By adding the crack inhibitor, the glass transition temperature (Tg) is lowered at low temperatures, increasing the fluidity of the asphalt. This allows the asphalt to remain fluid even at low temperatures, preventing crack formation. Specifically, with the crack inhibitor, the non-volatile room-temperature modified asphalt binder according to one embodiment can maintain fluidity and prevent cracking even at temperatures below -20°C, for example, -60°C to -20°C, -50°C to -25°C, or -45°C to -30°C.

[0047] In one embodiment, the crack inhibitor may be, for example, polypropylene glycol and / or polyethylene glycol as polyalkylene glycol, but is not necessarily limited thereto. Furthermore, the crack inhibitor may be, but is not necessarily limited thereto, in an amount of 2 to 5% by weight relative to 100% by weight of the non-volatile room-temperature modified asphalt binder. When the crack inhibitor is used at less than 2% by weight, the effect of increasing fluidity is not observed, and when used at more than 5% by weight, the viscosity of the asphalt binder becomes significantly lower, potentially reducing the thickness of the aggregate coating.

[0048] In one embodiment, the water-repellent additive is a substance that minimizes the delamination phenomenon between the non-volatile room-temperature modified asphalt binder and the aggregate, and may, for example, be siloxane and / or silicone oil, but is not necessarily limited thereto. Furthermore, the water-repellent additive may be 0.2 to 0.5% by weight per 100% by weight of the non-volatile room-temperature modified asphalt binder, but is not necessarily limited thereto, and if used in amounts less than 0.2% by weight or more than 0.5% by weight, separation of the binder and aggregate may occur.

[0049] In one embodiment, the carboxymethylcellulose may be 0.1 to 1% by weight per 100% by weight of the non-volatile room-temperature modified asphalt binder, but is not necessarily limited thereto. Specifically, the carboxymethylcellulose may be 0.2 to 0.9% by weight, 0.3 to 0.8% by weight, or 0.4 to 0.7% by weight. Also, in one embodiment, the degree of carboxylation is 0.5 to 1, and the Brookfield viscosity at 25°C is 3000 to 4000 cps, but is not necessarily limited thereto. Here, the degree of carboxylation of the carboxymethylcellulose refers to the average number of carboxymethyl groups per anhydrous glucose ring.

[0050] In one embodiment, the carbon nanotubes act as a strong reinforcing material within a non-volatile, room-temperature modified asphalt binder, improving its mechanical strength, durability, and thermal stability. They can enhance the flow resistance of the non-volatile, room-temperature modified asphalt binder at high temperatures, preventing plastic deformation and suppressing the growth of microcracks in the asphalt.

[0051] Another embodiment provides a non-volatile room-temperature recycled asphalt mixture comprising 1-3% by weight of the non-volatile room-temperature modified asphalt binder, 93-97% by weight of recycled aggregate, 2-4% by weight of filler, and 0.5-2% by weight of graphene. Here, the contents relating to the non-volatile room-temperature modified asphalt binder described above can be applied similarly, and redundant content will be omitted below.

[0052] In one embodiment, the graphene is a two-dimensional nanomaterial composed of carbon atoms, which can improve strength and toughness in a non-volatile, room-temperature recycled asphalt mixture, thereby increasing crack resistance and improving fatigue resistance, thereby extending the pavement life.

[0053] In one embodiment, the graphene may be present in an amount of 0.5 to 2% by weight relative to 100% by weight of the non-volatile room-temperature recycled asphalt mixture, but is not necessarily limited thereto. If less than 0.5% by weight of graphene is used, there is no improvement in mechanical properties such as strength and toughness, and if more than 2% by weight is used, aggregation may occur during the manufacturing process of the mixture, potentially leading to quality degradation.

[0054] In one embodiment, the non-volatile room-temperature recycled asphalt mixture may be applied to sidewalks, bicycle paths, or walking paths, but is not necessarily limited thereto.

[0055] In one embodiment, a pigment can be added to the non-volatile, room-temperature recycled asphalt mixture to express a hue on the road surface.

[0056] In one embodiment, the non-volatile room-temperature recycled asphalt mixture can be mixed and manufactured at room temperature.

[0057] Another embodiment provides a non-volatile room-temperature recycled asphalt pouch manufactured by pouring the non-volatile room-temperature recycled asphalt mixture into a packaging container, the non-volatile room-temperature recycled asphalt pouch being poured into potholes and cracks. Here, the contents of the non-volatile room-temperature recycled asphalt mixture described above can be applied similarly, and redundant content will be omitted below.

[0058] In one embodiment, potholes and cracks mean damaged portions of the asphalt road and / or surface, which may be all or part of the asphalt road and / or surface that requires repair.

[0059] In one embodiment, the non-volatile, room-temperature recycled asphalt pouch can be injected into potholes and cracks, then pressurized by the tires of passing vehicles, and used to fill the potholes and cracks.

[0060] In one embodiment, filling the potholes and cracks with the non-volatile, room-temperature recycled asphalt pouches may involve filling the potholes and cracks with non-volatile, room-temperature recycled asphalt pouches of different sizes depending on the size of the potholes and cracks as the vehicle moves.

[0061] In one embodiment, the packaging container can be manufactured from a stretchable fabric.

[0062] In one embodiment, the stretchable fabric may include, but is not limited to, one or more materials selected from the group consisting of polyurethane, polyethylene, high-density polyethylene, nylon, and spandex.

[0063] Another embodiment provides a method for repairing potholes and cracks, which includes the steps of: automatically detecting potholes and cracks while operating a road repair vehicle; filling the automatically detected potholes and cracks with a non-volatile, room-temperature recycled asphalt pouch; and flattening the potholes and cracks by bonding with the non-volatile, room-temperature recycled asphalt pouch due to the tire pressure of the vehicle moving along the road. Here, the contents of the non-volatile, room-temperature recycled asphalt pouch described above can be applied similarly, and redundant content will be omitted below.

[0064] In one embodiment, the step of adding the non-volatile, room-temperature recycled asphalt pouch may involve adding non-volatile, room-temperature recycled asphalt pouches of different sizes depending on the size of the potholes and cracks.

[0065] In one embodiment, the step of introducing the non-volatile, room-temperature recycled asphalt pouch may be performed automatically by a sensor or manually, but is not necessarily limited to these methods.

[0066] In one embodiment, the sensor may, but is not limited to, a robot.

[0067] The examples will be further described below with reference to specific experimental examples. The examples and comparative examples included in the experimental examples are for illustrative purposes only and do not limit the scope of the attached claims. It will be obvious to those skilled in the art that various changes and modifications to the examples are possible within the scope of the disclosure and the technical concept, and it goes without saying that such variations and modifications fall within the scope of the attached claims.

[0068] <Example 1> Production of non-volatile room-temperature recycled asphalt mixture A non-volatile, room-temperature recycled asphalt mixture was produced by mixing 2% by weight of a non-volatile, room-temperature modified asphalt binder, 95% by weight of recycled aggregate, 3% by weight of filler, and 1% by weight of graphene, which are produced at room temperature.

[0069] The method for producing the non-volatile room-temperature modified asphalt binder is as follows: 15% by weight each of petroleum asphalt and natural asphalt is heated at 165°C. 10% by weight of RMC polymer modifier is added to the heated mixture of petroleum asphalt and natural asphalt, and the mixture is stirred in a batch plant at 175°C for at least 3 hours. 12% by weight of an adhesion enhancer is added to the mixture, and the mixture is stirred at 175°C for at least 1 hour. Then, 30% by weight of process oil is added, and the mixture is stirred at 175°C for at least 1 hour. Next, 3% by weight of polypropylene glycol as a crack inhibitor, 0.3% by weight of silicone oil as a water-repellent additive, 0.5% by weight of carboxymethylcellulose (degree of carboxylation: 0.7, Brookfield viscosity at 25°C: 3500 cps), and 0.2% by weight of carbon nanotubes are added, and the mixture is stirred at 170°C for at least 1 hour. After stirring, the mixture is cooled to produce the non-volatile room-temperature modified asphalt binder.

[0070] <Example 2> Production of non-volatile room-temperature recycled asphalt mixture A non-volatile, room-temperature regenerated asphalt mixture was prepared in the same manner as in Example 1, except that 3% by weight of a non-volatile, room-temperature modified asphalt binder and 1.5% by weight of graphene were mixed in the same manner as in Example 1.

[0071] <Example 3> Production of non-volatile room-temperature recycled asphalt mixture A non-volatile, room-temperature regenerated asphalt mixture was prepared in the same manner as in Example 1, except that 1% by weight of a non-volatile, room-temperature modified asphalt binder and 0.5% by weight of graphene were mixed in the same manner as in Example 1.

[0072] <Comparative Example 1> Production of Asphalt Mixture An asphalt mixture was prepared in the same manner as in Example 1, except that 6% by weight of cutback asphalt binder (manufactured by Company D), heated at 55°C, was added instead of the non-volatile room-temperature modified asphalt binder used in Example 1, and graphene was not added.

[0073] <Comparative Example 2> Production of Asphalt Mixture An asphalt mixture was prepared in the same manner as in Example 1, except that 7% by weight of an emulsified asphalt binder at room temperature was added instead of the non-volatile room-temperature modified asphalt binder used in Example 1, and 5% by weight of graphene was added.

[0074] <Comparative Example 3> Production of Asphalt Mixture An asphalt mixture produced at room temperature was manufactured by mixing 5% by weight of non-volatile room-temperature modified asphalt binder, 95% by weight of recycled aggregate, and 3% by weight of filler.

[0075] Here, the non-volatile room-temperature modified asphalt binder was prepared in the same manner as in Example 1, except that 1% by weight of polypropylene glycol and 2% by weight of carboxymethylcellulose (degree of carboxylation: 1.2, Brookfield viscosity at 25°C: 3500 cps) were added.

[0076] <Experimental Example 1> Experiment on the resistance force of a mixture to plastic flow In accordance with KS F 2337, the resistance of the mixture to plastic flow was measured using a Marshall tester, and the results are shown in Table 1 below.

[0077] [Table 1]

[0078] The non-volatile, room-temperature regenerated asphalt mixture of the Examples exhibits significantly higher Marshall stability compared to the Comparative Example. Since the non-volatile, room-temperature modified asphalt binder included in the Examples contains carbon nanotubes, it can be seen that the Examples mixture is significantly more stable in terms of dynamic stability compared to the Comparative Example. Furthermore, because the non-volatile, room-temperature regenerated asphalt mixture of the Examples contains polypropylene glycol as a crack inhibitor, it can prevent asphalt cracking even at low temperatures and has a significantly lower porosity compared to the Comparative Example. In particular, Comparative Example 3 contains carboxymethylcellulose with a carboxylation degree of 1.2, which falls outside the carboxylation degree range of the carboxymethylcellulose in the Examples. This demonstrates that the asphalt mixture of the Examples has significantly higher fluidity, porosity, and stability compared to the Comparative Example.

[0079] <Experimental Example 2> Tensile Adhesion Strength Experiment In accordance with KS F 2386, the tensile adhesive strength of the road pavement's bonding surface was measured, and the results are shown in Table 2 below.

[0080] [Table 2]

[0081] The non-volatile, room-temperature modified asphalt binder in the examples contains silicone oil as a water-repellent additive. As a result, the asphalt mixtures of Examples 1 and 2 exhibit significantly higher adhesion to asphalt and concrete slabs compared to the comparative examples, not only in a dry state but also in a wet state. Therefore, when the asphalt binders of the examples are used in rainy weather and winter, the adhesion to aggregates becomes very high, thus solving the problem of not being able to use conventional asphalt binders in rainy weather and winter.

[0082] The above description is merely an example of applying the principles of this disclosure, and other configurations may be included without departing from the scope of this disclosure. Although one embodiment has been described in detail above with reference to examples and experimental examples, the scope of one embodiment is not limited to any particular embodiment and should be interpreted in accordance with the appended claims.

Claims

1. (i) 0.1 to 30% by weight of one or more types of petroleum asphalt selected from straight asphalt or blown asphalt, (b) 0.1 to 30% by weight of one or more natural asphalts selected from gilsonite, glanspitch and grahamite, (h) 0.1 to 15% by weight of a rubber modification compound (RMC) polymer modifier which is a vinyl aromatic hydrocarbon-conjugated diene block copolymer using one or more of the following: styrene-butadiene block copolymer (SBS), styrene-isoprene block copolymer (SIS), and styrene-ethylene-butylene block copolymer (SEBS), (ii) 20 to 50% by weight of one or more process oils selected from paraffin oil, naphthenic oil, aromatic oil, natural oil and mineral oil, (e) 0.5 to 30% by weight of one or more adhesive strengthening agents selected from rosin ester, modified acrylic, modified silicone, polyvinyl ester, and silicone resin types, (h) 2 to 5% by weight of one or more crack inhibitors selected from polypropylene glycol and polyethylene glycol, (t) 0.2 to 0.5% by weight of one or more water-repellent additives selected from siloxanes and silicone oils, (i) 0.1 to 1% by weight of carboxymethylcellulose having a degree of carboxylation of 0.5 to 1 and a Brookfield viscosity of 3000 to 4000 cps at 25°C, (i) A non-volatile, room-temperature modified asphalt binder containing 0.1 to 0.5% by weight of carbon nanotubes.

2. 1 to 3% by weight of the non-volatile room-temperature modified asphalt binder described in claim 1, Recycled aggregate 93-97% by weight, Filler 2-4% by weight, A non-volatile, room-temperature recycled asphalt mixture containing 0.5 to 2% by weight of graphene.

3. The non-volatile room-temperature recycled asphalt mixture according to claim 2, characterized in that it is applied to sidewalks, bicycle paths, or walking paths.

4. A non-volatile, room-temperature recycled asphalt mixture according to claim 2, which is manufactured by mixing at room temperature.

5. A non-volatile, room-temperature recycled asphalt pouch manufactured by placing the non-volatile, room-temperature recycled asphalt mixture described in any one of claims 2 to 4 into a packaging container, The aforementioned non-volatile, room-temperature recycled asphalt pouch is a non-volatile, room-temperature recycled asphalt pouch that is poured into potholes and cracks.

6. The non-volatile, room-temperature recycled asphalt pouch according to claim 5, which, after being injected into potholes and cracks, is pressurized by the tires of passing vehicles and fills the potholes and cracks.

7. The non-volatile, room-temperature recycled asphalt pouch according to claim 5, wherein the injection of the non-volatile, room-temperature recycled asphalt pouch into the potholes and cracks is performed by injecting non-volatile, room-temperature recycled asphalt pouches of different sizes according to the size of the potholes and cracks while the vehicle is in motion.

8. The packaging container is made of a stretchable fabric, the non-volatile, room-temperature recyclable asphalt pouch according to claim 5.

9. The non-volatile, room-temperature regenerated asphalt pouch according to claim 8, wherein the stretchable fabric comprises one or more selected from the group consisting of polyurethane, polyethylene, high-density polyethylene, nylon, and spandex.

10. The process involves automatically detecting potholes and cracks while operating a road repair vehicle, The steps include: pouring non-volatile, room-temperature regenerated asphalt pouches into the automatically detected potholes and cracks; A method for repairing potholes and cracks, comprising the step of the potholes and cracks being flattened by the tire pressure of a vehicle moving on the road by bonding with the non-volatile room-temperature recycled asphalt pouch.

11. The method for repairing potholes and cracks according to claim 10, wherein the step of introducing the non-volatile, room-temperature recycled asphalt pouch is further comprising introducing non-volatile, room-temperature recycled asphalt pouches of different sizes depending on the size of the potholes and cracks.

12. The method for repairing potholes and cracks according to claim 10, wherein the step of introducing the non-volatile, room-temperature recycled asphalt pouch is either automatically introduced by a sensor or introduced manually.

13. The method for repairing potholes and cracks according to claim 12, wherein the sensor includes a robot.

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