Asphalt modifier for bituminous concrete pavement and method for preparing same

Abstract

The asphalt modifier consists of processed diatomite 30-50 wt%, and clay mineral with kaolin as main component and through roasting at 750-950 deg.c for 5-8 hr, except sulfur. During construction, the asphalt modifier, asphalt, aggregate, etc. are stirred in asphalt concrete stirrer in traditional technological process. The asphalt modifier of the present invention has low cost, and can raise the high and low temperature performance and water stability of asphalt concrete obviously, raise the dynamic stability and track resistance of asphalt concrete road, and prolong the service life of asphalt concrete road obviously.

Description

technical field [0001] The invention relates to an asphalt modifier and a preparation method thereof. Background technique [0002] According to statistics, 75% of my country's highways are made of asphalt concrete pavement. Due to the base asphalt itself, the road has poor heat-temperature performance and rapid damage, which seriously cannot meet the needs of transportation. Therefore, it is necessary to modify the asphalt. High molecular polymers and silicon-modified asphalt are used as road asphalt modifiers. High molecular polymer asphalt modifier itself is expensive, requires expensive special supporting equipment when used, and is prone to segregation during use. Silicon-modified asphalt modifiers, such as the disclosed silicon-modified asphalt modifiers in Chinese patent documents with application number 00113119.2, also have certain limitations in use, mainly because the dynamic stability of the road is not high enough. Contents of the invention [0003] The pur...

AI Technical Summary

Problems solved by technology

High molecular polymer asphalt modifier itself is expensive, requires expensive special supporting equipment when used, and is prone to segregation during use

Silicon-modified asphalt modifiers, such as the silicon-modified asphalt modifier disclosed in the Chinese patent document with application number 00113119.2, also have certain limitations in use, mainly because the dynamic stability of the road is not high enough.