基于硅藻土中SiO2含量变化对沥青混合料性能影响分析

Analysis of Influence of Asphalt Mixture Performance Based on Variation of SiO2 Content in Diatomite

随着国内各省(市)高速公路通车里程的不断增加,路面病害也不同程度地出现;目前以路面车辙、疲劳行为、水损害等现象为代表,其中路面的高温使用性能尤为人们所关注,如何有效的预防和治理路面车辙业已成为国内外研究的重点,硅藻土作为一种无机材料添加到沥青混合料中能够有效提高沥青路面的高温抗车辙能力,硅藻土之所以能够抗车辙,SiO2含量起着关键作用,本文通过研究硅藻土中SiO2不同含量时沥青混合料高温、水稳定性能、低温性能,确定不同等级公路中SiO2含量的最低值。

With the continuous increase of highway mileage in various provinces(cities)in China,pavement diseases have also appeared to varying degrees;at present,road rutting,fatigue behavior,water damage and other phenomena are represented,and the high temperature performance of the road surface is particularly concerned.How to effectively prevent and treat road rutting has become the focus of research at home and abroad.As an inorganic material added to asphalt mixture,diatomaceous earth can effectively improve the high temperature resistance of asphalt pavement.The reason why diatomaceous earth can resist rutting The content of SiO2 plays a key role.In this paper,by studying the high temperature,water stability and low temperature performance of asphalt mixture with different content of SiO2 in diatomite,the lowest value of SiO2 content in different grades of roads is determined.