SBS改性沥青黏层抗剪性能试验研究  

Shear Strength of SBS Modified Asphalt Bonding Layer

作　　者：秦禄生[1] 

机构地区：[1]河北省交通运输厅公路管理局,河北石家庄050051

出　　处：《上海公路》2013年第3期51-53,11,共3页Shanghai Highways

摘　　要：SBS改性沥青黏层是近年来高等级公路沥青混合料层层间结合常用材料。通过室内直剪、斜剪和拉拔试验对几种不同类型的SBS黏层材料的界面黏结性能进行了研究。试验结果显示,随温度升高,黏层抗剪强度降低,在60~70℃区间时直剪试验强度降幅为是斜剪试验的6倍。SBS改性沥青洒布量达1.8~2.0 kg/m^2时,试验抗剪强度出现峰值。保持沥青用量不变,碎石撒布量在55%时,出现抗剪强度峰值。SBS modified asphalt bonding layer has been commonly used in highway asphalt pavement.By direct shear test,45°shear test and pull-off test,it is found that:(1) the shear strength decreases with temperature increasing.When temperature increase from 60℃ to 7℃,the strength of direct shear test decrease 6 times than that of 45°shear test.(2) When SBS modified asphalt is used as 1.8 ~2.0kg/m^2,the shear strength increase to the peak.(3)when 55%of the surface is covered by aggregates,the shear strength is highest.

关 键 词：SBS改性沥青 沥青黏层 抗剪强度 试验 

分 类 号：U414[交通运输工程—道路与铁道工程]