Preparation method of high-thermal conductivity carbon nanofiber modified asphalt mixture

Abstract

The invention discloses a preparation method of a high-thermal conductivity carbon nanofiber modified asphalt mixture, which belongs to the preparation technical field of the asphalt pavement materials, and solves the problems that no high-thermal conductivity carbon nanofiber is used as a modifier, and no preparation method of the high-thermal conductivity carbon nanofiber modified asphalt mixture exists at present. The preparation method comprises the following steps of firstly, obtaining the carbon nanofibers by adopting a catalytic pyrolysis method; oxidizing and modifying the surface of the carbon nano-fibers to obtain the high-thermal-conductivity carbon nano-fibers; then, preparing the modified asphalt by taking the modified asphalt as a modifier; mixing with aggregate, mineral powder and the like to obtain a high-thermal conductivity carbon nanofiber modified asphalt mixture; then molding the mixture into a test piece by adopting an edge runner method, placing the test piece ata room temperature for 48 hours, then cutting the test piece into a prismoid test piece, and finally determining the heat conductivity coefficient of the dried prismoid test piece by utilizing a rapid heat conductivity coefficient determinator so as to determine the optimal mixing amount of the high-heat-conductivity carbon nanofibers. The prepared high-thermal conductivity carbon nanofiber asphalt mixture can be used for the road construction in cold regions, and the thermal conductivity of the asphalt pavements is improved.

Description

technical field [0001] The invention relates to a method for preparing a highly thermally conductive nano-carbon fiber modified asphalt mixture, which belongs to the technical field of asphalt pavement material preparation. Background technique [0002] A large number of investigations and studies have shown that the quality of the road surface is one of the important factors affecting road traffic. The surface function of the road is the basis for ensuring safe traffic operation. The quality of the asphalt pavement in winter is one of the key points. Our country has a vast territory, about 43% of which is located in the cold area, and snow and ice are prone to occur in winter. Snow and ice will reduce the anti-skid ability of the road surface, affect road traffic safety, and affect the normal operation and order of the national economy. The safety of people's lives and property has caused huge hidden dangers. At present, in order to reduce traffic accidents caused by snow ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of high thermal conductivity nano-carbon fiber modified asphalt mixture, which solves the problem that there is no high thermal conductivity nano-carbon fiber as a modifier and no preparation method of high thermal conductivity nano-carbon fiber modified asphalt mixture. Heat-conducting nano-carbon fiber asphalt mixture to improve the thermal conductivity of asphalt mixture

[0009] In order to solve the problem that there is no high thermal conductivity nano-carbon fiber as a modifier and no preparation method of high thermal conductivity nano-carbon fiber modified asphalt mixture