Waste rubber powder modified asphalt composition and its preparation method

Abstract

The invention provides a method to improve the storage stability for waste rubber powder modified asphalt. Wherein, the opposite compound comprises: 70~98.5% basic asphalt, 1~29.5% waste rubber, 0~10.0% diluent, and 0.1~5.0% coupling agent. The method comprises: adding the agents with given ratio into the waste rubber powder past 60-item screen to mix evenly; adding the treated rubber powder into asphalt to grinde for 30~190min by special device. As the alkoxy in coupling agent can form chemical bonding with inorganic filler to form organic active monomolecular layer between interfaces, this product can improve obviously the storage stability.

Description

technical field

[0001] The invention relates to a waste rubber powder modified asphalt composition and a preparation method thereof, in particular to a method for improving the storage stability of the waste rubber powder modified asphalt composition. Background technique

[0002] With the development of the automobile industry, more and more "black pollution" formed by waste tires is threatening our living environment. Using waste rubber powder to produce high-quality modified asphalt can make full use of waste rubber. It is beneficial to eliminate environmental pollution, and can also improve the performance of asphalt pavement.

[0003] However, at present, the main technical problem of waste rubber powder modified asphalt is the miscibility of rubber powder and asphalt. In order to improve the mutual solubility of rubber powder and asphalt, the main method adopted is to apply fine rubber powder with small particle size and fully disperse the rubber powder through collo...