High-performance graphene modified asphalt and preparation method

Abstract

The invention provides a high-performance graphene modified asphalt and a preparation method. The high-performance graphene modified asphalt is composed of 70# matrix asphalts, graphene and polyvinylpyrrolidone; the mass ratio relationship of the foregoing three substances is that the mass of the graphene is 12%O-14%O of the mass of the 70# matrix asphalts, and the mass of the polyvinylpyrrolidoneis 0.8%-1.0% of the mass of the graphene. The advantages are that the high-performance graphene modified asphalt suitable for industrial production and the preparation method are provided.

Description

technical field [0001] The invention relates to a nano-material composite modified asphalt preparation technology, in particular to a high-performance graphene modified asphalt and a production method. Background technique [0002] Highway construction is an important indicator to measure the development of the national economy. In recent years, my country's highway construction has made great progress. By the end of 2014, the total mileage of my country's highways had exceeded 4.45 million kilometers, ranking first in the world; among all highway construction mileage, asphalt The pavement occupies the vast majority. Due to factors such as increased traffic volume, large-scale vehicles, heavy vehicle loads, and temperature differences, rutting and cracking on the asphalt pavement may occur from time to time, resulting in a decline in the performance of the asphalt pavement. Higher requirements are put forward for the performance and quality of the asphalt pavement. It is hoped...

AI Technical Summary

Problems solved by technology

[0003] At present, the development of SBS modified asphalt is the most beneficial to the improvement of asphalt pavement; practice shows that adding SBS modifier to base asphalt can significantly improve the high temperature stability, fatigue resistance and temperature sensitivity of the pavement; but in practice In application, SBS modified asphalt has problems such as high requirements for preparation conditions, unstable storage (easy to delaminate, coagulate or segregate), and difficult mixing construction, which leads to poor controllability of the quality of asphalt and asphalt mixture, which affects to a certain extent performance on asphalt roads

[0004] Graphene is a nano-material with huge specific surface area and super surface activity. Experiments have proved that adding graphene to asphalt can have a special effect on the physical and chemical properties of asphalt, thereby improving the performance of asphalt; however, in In actual production, it is impossible to directly add graphene to asphalt: experiments have shown that when the amount of graphene added reaches a certain level, graphene will have serious agglomeration problems, and graphene cannot be dispersed evenly in asphalt, resulting in graphene being unable to Modification effect on asphalt

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