Road asphalt modifier and preparation method and application thereof

Abstract

The invention belongs to the technical field of asphalt modification, and particularly discloses a road asphalt modifier which is composed of a styrene thermoplastic elastomer and catalytic cracking oil slurry. The invention also discloses a preparation method and an application method of the road asphalt modifier. The road asphalt modifier disclosed by the invention can be quickly melted and dispersed in hot asphalt at the temperature of about 180 DEG C, and the effect of the road asphalt modifier can be achieved and superior to that of SBS road modified asphalt with the same addition amountwithin 30-60 min generally.

Description

technical field [0001] The invention relates to a fast-melting road modified asphalt high-ductility road asphalt modifier and a preparation method thereof, specifically belonging to the technical field of styrene thermoplastic elastomer SBS road modified asphalt and its technology. [0002] technical background [0003] Styrene butadiene styrene thermoplastic elastomer SBS road modified asphalt can effectively improve the high temperature fluidity and low temperature brittleness of asphalt, and improve the high and low temperature performance of road modified asphalt. It has been widely used in road construction and is the best so far. Modified asphalt method. [0004] As far as the styrene-based thermoplastic elastomer SBS modified road asphalt is concerned, SBS has its own special grade. Although the grade names of various manufacturers are different, they are similar in technical parameters. Generally, there are linear type, star type and mixed type. Several structures, t...

AI Technical Summary

Problems solved by technology

Most professionals engaged in SBS asphalt modification know that the production process of SBS modified asphalt is as follows: first add SBS to molten hot asphalt, heat up to about 180°C, stir and pre-melt for 1-2 hours, and then grind through colloid mill After the modified asphalt is obtained, if it does not pass through the colloid mill, it needs to be stirred at about 180°C for 6-7 hours to obtain a modified asphalt with comparable performance. Not only the mixing time is long and the efficiency is low, but also the asphalt modification effect due to excessive aging of SBS bad risk

In order to facilitate the melting and dispersion of SBS in asphalt, the shape of SBS product must be fluffy granules or powder, otherwise, even if the temperature is raised and the time is prolonged, it is difficult to melt and disperse dense SBS particles in asphalt, and they cannot enter the colloid mill. Can not reach the good effect of SBS road modified asphalt