Modifier mother liquor and road asphalt, and preparation methods thereof

Abstract

The invention discloses a modifier mother liquor and a road asphalt, and preparation methods thereof. The modifier mother liquor comprises, by weight, 78-94 parts of anthracene oil, 0.4-3.2 parts of polyphosphoric acid and 4-20 parts of SBS. The modifier mother liquor is used for the condensation modification of the anthracene oil by using PPA, especially the modification of the anthracene oil through a two-step technology in order to make the anthracene oil reach a suitable condensation degree, so the aroma degree of the anthracene oil is improved, and the content of suitable colloids is increased. The modifier mother liquor is combined with petroleum asphalt and coal pitch to prepare the road asphalt, so the colloidal structure of the road asphalt product is reasonable, the high and lowtemperature performances of the asphalt are enhanced, and the heat storage stability of the product is improved.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and mainly relates to a modifier mother liquid, road asphalt and a preparation method thereof, in particular to a preparation method of 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 shor...

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