Preparation methods of modifier mother liquor and road asphalt

Abstract

The invention discloses preparation methods of a modifier mother liquor and a road asphalt. The modifier mother liquor preparation method comprises: adding anthracene oil to a reaction kettle, addinghydrogen peroxide, heating, controlling the reaction temperature at 90-150 DEG C, stirring to obtain modified anthracene oil, continuously adding a macromolecule polymer to the reaction kettle, controlling the temperature of the reaction kettle at 120-180 DEG C, and stirring to obtain the modifier mother liquor. According to the present invention, the road asphalt is prepared by matching the modifier mother liquor, coal tar pitch and petroleum pitch, such that the high temperature and low temperature performances and the heat storage stability of the asphalt can be easily improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and mainly relates to a method for preparing modifier mother liquid and road asphalt, in particular to a method for preparing road asphalt produced from coal tar pitch and petroleum pitch as raw materials. Background technique [0002] With the continuous expansion of road construction scale, the market demand for road asphalt is also growing at a high speed. At present, oil resources are increasingly scarce, and the processing value of coal tar pitch (coal tar pitch) is low, and the market price is only about half of that of petroleum pitch. For this reason, researchers are constantly exploring whether coal tar pitch can be used as a raw material for the production of road pitch . Coal tar pitch produced by traditional methods has disadvantages such as poor heat sensitivity, easy aging, and poor ductility, which cannot meet the needs of road construction. Aiming at the shortcomings o...

AI Technical Summary

Problems solved by technology

In this method, the proportion of coal tar pitch is relatively high (50-30 parts of coal tar pitch), and the proportion of petroleum pitch is relatively small (10-20 parts of petroleum pitch). , leading to too high content of asphaltene in the asphalt colloidal structure, unreasonable asphalt colloid composition matching, which will lead to poor flexibility of asphalt, poor low temperature performance and thermal storage stability

In addition, adding 5-35 parts of waste rubber powder to asphalt will lead to too high mixing temperature of asphalt and poor thermal storage stability

The preparation process is to pre-mix petroleum pitch, coal tar pitch and co-solvent with SBS, and then grind through a colloid mill. Large size, high power consumption