A kind of red mud-based asphalt powder and its preparation method and application

Abstract

The invention provides a red mud-based asphalt powder and its preparation method and application, belonging to the technical fields of industrial waste treatment and traffic building materials. The red mud-based asphalt powder raw material includes base asphalt, red mud and zeolite powder. The present invention uses industrial waste sintering method red mud or Bayer red mud as raw materials, effectively utilizes industrial waste materials, zeolite powder micro-foams matrix asphalt at high temperature, improves the fluidity of asphalt, and increases the relationship with red mud. The contact area is more evenly dispersed, and then the red mud is mixed with the micro-foaming matrix asphalt to absorb and wrap the asphalt, and it is ground into a powder state at normal temperature. The red mud-based asphalt powder of the present invention has a simple production process and good storage stability Good, can be constructed at room temperature, convenient to transport, and can be mixed with other powder materials in any proportion, has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of industrial waste treatment and traffic building materials, and in particular relates to a red mud-based asphalt powder and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Asphalt is a dark brown complex mixture composed of hydrocarbons of different molecular weights and their non-metallic derivatives. It is liquid, semi-solid or solid. It is a waterproof, moisture-proof and anti-corrosion organic gelling material. However, most of asphalt and its derivatives need to be heated during use, which makes construction more difficult and energy consumption increas...

AI Technical Summary

Problems solved by technology

[0005] There are three kinds of asphalt powder production methods commonly used at present, the first one is to adopt dry method or wet method to mechanically pulverize high softening point asphalt, through pretreatment to improve the softening point of asphalt, and then mechanically pulverize, the inventor finds that the problem of its existence is the process Complicated, the particle size of mechanical crushing is limited, wet crushing also needs to dehydrate and dry the product; the second is to use freezing method to increase the brittleness of asphalt, and then mechanical crushing, this method needs to freeze the asphalt to 0 ~ -10 ℃, so that It becomes brittle at low temperature and is easy to break. The inventors found that the problem is that it consumes more energy and the crushing particle size is limited, so it can only be crushed in stages to 2-10mm.

The third is to use the thermal spray method to produce asphalt powder. Although the thermal spray method can be operated continuously without mechanical crushing, it needs to heat and melt the asphalt and pump it to high pressure. The cooling tower is also high, and the product needs to be dried, which is also time-consuming and laborious.

Images