A kind of high-strength modified asphalt and preparation method thereof

Abstract

The invention relates to a high-strength modified asphalt and a preparation method thereof proposed by the invention, comprising the following components in parts by weight: 40-90 parts of 70# base asphalt, 5-9 parts of a polymer modifier, a composite anti-rutting aid 15-35 parts of antioxidants, 0.5-1.5 parts of antioxidants, 3-7 parts of organic viscosity reducers, and 0.2-0.4 parts of stabilizers. Different from the existing single rock asphalt modification with a large content, the composite modification uses other materials such as petroleum resin to compound or replace the rock asphalt to improve the high temperature performance of the asphalt under the premise of reducing the content of the rock asphalt. Under the premise of performance, the modified asphalt can be stored stably, and it is not easy to deposit on the bottom of the tank and pollute the production pipeline, so as to ensure the quality of asphalt production.

Description

technical field [0001] The invention relates to modified asphalt for road and bridge paving, in particular to high-strength modified asphalt and a specific preparation method thereof. Background technique [0002] One of the main damage forms of expressways is pavement damage. Among the main diseases of asphalt pavement, the phenomenon of rutting is particularly common, and the damage to the pavement is also the most serious, which greatly increases the repair cost of the pavement. The problem of rutting usually occurs in the high temperature period of the first summer. Some road ruts have a depth of 10 to 50 mm, or even more than 100 mm, which makes the road surface even worse, and soon appears network cracks, potholes, potholes and other pathologies. . And with the rise of temperature and the increase of pavement axle load, ordinary modified asphalt concrete pavement can meet the requirements for general load driving sections, but for some special sections such as heavy l...

AI Technical Summary

Problems solved by technology

And as the temperature rises and the axle load of the road surface increases, the ordinary modified asphalt concrete pavement can meet the requirements for the general load traffic section, but for some special road sections such as heavy lanes, intersections, service areas, and uphill slow travel, etc. The same modified asphalt will soon have defects such as rutting, which will reduce the driving comfort of the road surface and even reduce the driving safety of the road surface.

[0003] The main improvement measure of the existing technology is to blend and modify the matrix asphalt with high-volume rock asphalt powder or anti-rutting masterbatch to prepare high-strength modified asphalt. Although the strength has been improved, the rock asphalt powder has too much ash, which is easy to Precipitation, long-term production is easy to pollute the pipeline and silt the bottom of the tank, which is not conducive to long-term production and product storage. At the same time, due to the high viscosity, the mixing temperature of asphalt mixture is strict, which is not conducive to production and use.

Images