基于体积法的BRA沥青混合料配合比设计方法

在体积法的基础上,根据布敦岩沥青(BRA)的特点提出基于体积法的BRA沥青混合料配合比设计方法。此法在设计中引入数学模型,避免BRA颗粒对合成级配产生的干涉效应,提高了BRA沥青混合料中最佳沥青用量、VMA。试验表明,体积法快捷、方便,得到的BRA沥青混合料具有良好的体积参数,有效避免了传统BRA混合料的不足,具有优良的路用性能。

Design of Buton Rock Asphalt (BRA) Mixture Mixing Ratio Based on Volume Method

On the basis of the volume method,the paper proposes the mixing ratio design method of BRA mixture according to the characteristics of BRA.This method is introduced into the mathematical model in the design,avoids the interference effect of BRA granule on the compound gradation,and improves the optimum asphalt content and VMA in BRA mixture.The testing results show that the volume method is quick and convenient,and the BRA mixture has the favorable volume parameters,which efficiently avoids the shortages of the traditional BRA mixture and has the excellent road performance.