布敦岩沥青改性沥青混合料的二阶段设计方法研究  

Study on Tow-phase Design Method of Buton Rock Asphalt Modified Asphalt Mixture

作　　者：蒋国杰[1] 郅宏飞[1] 王胜[1] 

机构地区：[1]同济大学交通运输工程学院,上海201804

出　　处：《城市道桥与防洪》2011年第9期242-244,332,共3页Urban Roads Bridges & Flood Control

摘　　要：该文阐述一种布敦岩沥青改性沥青混合料的设计方法。它通过两个阶段的设计步骤,在沥青混合料拌和过程中加布敦岩沥青(Buton Rock Asphalt,以下简称BRA),提高了普通基质沥青混合料的路用性能。第一阶段不添加BRA,采用马歇尔设计方法获得沥青混合料的最佳油石比。第二阶段在第一阶段获得的沥青混合料最佳油石比的基础上采用限定沥青与布敦岩沥青比例的方式添加BRA,且必须保持初试总沥青用量与第一阶段最佳沥青用量基本持平。最后采用马歇尔设计方法获得BRA改性沥青混合料的最佳油石比。The study provides a design method of Buton Rock Asphalt(short for BRA) modified asphalt mixture.In two phases of design step,BRA is added in the course of mixing the asphalt mixture to enhance the road-use performance of the matrix asphalt mixture.In the first phase,BRA is not added and Marshall design method is used to achieve the optimal proportion of asphalt to aggregate.In the second phase,BRA is added by the mode of the proportion of the restricted asphalt to BRA on the basis of the optimal proportion of asphalt to aggregate of asphalt mixture achieved in the first phase,and the total amount of asphalt must be kept in the preliminary test and is basically as much as the optimal asphalt amount of the first phase.Finally Marshall design method is used to achieve the optimal proportion of asphalt to aggregate of BRA modified asphalt mixture.

关 键 词：布敦岩沥青 布敦岩沥青改性沥青混合料 配合比 二阶段设计 

分 类 号：U416.217[交通运输工程—道路与铁道工程]