High-thermal-conductivity modified asphalt mixture based on carbon fibers and preparation method thereof

Abstract

The invention discloses a high-thermal-conductivity modified asphalt mixture based on carbon fibers and a preparation method thereof. The mixture comprises a three-dimensional heat conduction material, a styrene monomer, divinylbenzene, an initiator, epoxy resin, carboxyl silicone oil, epoxy asphalt, mineral fiber and aggregate. According to the asphalt mixture prepared by the invention, the defect that common carbon fibers can only conduct heat in a fixed direction is avoided, and the heat-conducting property of the asphalt mixture is further enhanced. Under the synergistic effect of high-speed electron irradiation and the initiator potassium persulfate, a polystyrene molecular chain generated by rapid polymerization is wound with an epoxy resin molecular chain, so that a stable molecularnetwork structure is formed in the asphalt mixture system; the asphalt mixture prepared by the invention is good in thermal conductivity and insulativity, excellent in mechanical property, not easy to generate an electric leakage phenomenon, high in safety, good in stability, not easy to generate layering and precipitation phenomena in standing, and very practical.

Description

technical field [0001] The invention relates to the technical field of asphalt, in particular to a carbon fiber-based high thermal conductivity modified asphalt mixture and a preparation method thereof. Background technique [0002] Asphalt mixture is mainly a mixture formed by stirring and mixing mineral materials and asphalt binder, which is widely used in various road paving in my country; the pavement formed by using asphalt mixture is smooth and smooth, with good shock absorption and noise reduction performance, and driving feeling Comfortable, safe and very popular. [0003] Although asphalt pavement has high safety in normal temperature environment, in the case of cold weather, the road surface is prone to snow and icing problems. Snow and icing on the road surface will seriously reduce the skid resistance of asphalt pavement. If the snow and ice on the road are not dealt with in time, it will easily lead to traffic safety problems, affect the normal traffic order, an...

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Problems solved by technology

[0003] Although asphalt pavement has high safety in normal temperature environment, it is prone to snow and icing problems in cold weather. Snow and icing on the road will seriously reduce the skid resistance of asphalt pavement If the snow and ice on the road are not dealt with in time, it will easily lead to traffic safety problems, affect the normal traffic order, and pose a huge threat to the personal safety and property safety of citizens.

[0004] At present, the main ways to solve the problem of snow and icing on roads in my country include spraying deicing agent, mechanical snow removal, thermal ice melting, electric deicing, etc. Among them, the method of spreading deicing agent is likely to cause corrosion of road facilities, accelerate road aging, and pollute groundwater sources and other problems; the ice breaker used in the mechanical snow removal method is easy to cause damage to the road surface, and the repair cost of the road surface in the later stage is high, and the snow removal efficiency is low; the thermal ice melting and electric ice melting technology of the road surface is installed by installing geothermal pipes, electric heating wires, etc. inside the road surface. The heating device transfers heat energy to the road surface to melt the ice and snow on the road surface; this method has high snow melting efficiency and will not cause damage to the road surface facilities and pavement structure, and has a very broad application prospect

[0005] However, ordinary asphalt mixtures have poor thermal conductivity and low utilization rate of heat, which can easily cause waste of electricity and heat resources, and increase the economic pressure on the government and the people; in order to reduce energy consumption and improve the snow melting efficiency of asphalt pavement Researchers have considered adding carbon nanotubes, carbon fibers and other substances to the asphalt mixture to enhance the thermal conductivity of the asphalt mixture; however, carbon nanotubes, carbon fibers and other substances are one-dimensional nanostructured substances. This kind of material has a slender structure and anisotropic thermal conductivity, that is, it has high thermal conductivity in a specified direction, but poor thermal conductivity in other directions; it is directly introduced into the asphalt pavement made of asphalt mixture The energy loss rate is still high, and carbon fiber and carbon nanotubes have excellent electrical conductivity. Once the heating device inside the road surface leaks electricity, it is very easy to cause electric shock to pedestrians on the road and reduce the safety performance of the road surface.

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