Preparation And Application Of Conductive Asphalt Concrete Graphene Electrode

As a new type of road deicing and snow removal method,the conductive asphalt concrete deicing snow has the advantages of high snow melting efficiency,no pollution,and has broad application prospects.However,due to the disadvantages of large electrodes and poor corrosion resistance used in conductive asphalt concrete,it must be buried inside the road surface layer,which leads to a low heating rate of conductive asphalt concrete and the determination of energy loss headlights in melting ice and snow.In this paper,graphene is used as an electrode material for conductive asphalt concrete,and by using graphene’s good electrical conductivity,mechanical properties,and corrosion resistance,a conductive asphalt concrete electrode solution set on the road surface layer with reasonable layout and good performance is developed.In order to achieve the purpose of improving the thermal efficiency of the conductive asphalt concrete and reducing the energy loss during heat transfer.Taking into account the large area and low cost of asphalt concrete electrodes,graphene thin films were prepared by redox method.A graphene oxide solution was prepared by a modified Hummers method,a graphene oxide film was prepared by a coating method,and the graphene oxide film was reduced by a chemical reduction method and a thermal reduction method to obtain a graphene film.The effects of film thickness,reaction time and reduction temperature on the mechanical and electrical properties of graphene films during the reduction process were studied.Comparing the two reduction methods,the preparation process of the graphene electrode material is determined.The layout of the electrodes was determined by using simulations combined with an indoor temperature-raising experiment.The multi-physics coupling simulation software COMSOL Multiphysics was used to establish the electrothermal model of the graphene electrode conductive asphalt concrete.The graphene electrode was prepared and the temperature rise experiment of the conductive asphalt concrete slab was compared with the simulation results to verify the reliability of the model.The influence of parameters such as width,spacing,and thickness on the thermal efficiency of the concrete was determined by combining the economic indicators with the layout of the electrodes.The comparison of different electrode patterns verified that the graphene electrode scheme had a higher heating rate.According to the surface layer position and working environment of the graphene electrode,the influence of load,temperature,water and other factors on the performance of the electrode was considered.The laboratory performance of the electrode was verified by laboratory experiments.The protective layer scheme of the electrode was determined by material comparison and its feasibility was verified;the influence of load,freeze-thaw cycles,and high-temperature load coupling on the conductive properties of the electrode surface of the asphalt concrete was verified,and the feasibility of the electrode scheme was verified.Based on the experimental results,determine the proper placement of the electrodes on the road surface.In this paper,a new type of graphene electrode for conductive asphalt concrete is proposed.The preparation of graphene electrodes,determination of layout scheme and road performance are systematically studied.It provides a technical reserve for the application of graphene electrode solutions and also extends the application of graphene as a new material.