ARA改性沥青制备及性能研究  

Research on Preparation and Properties of ARA Modified Asphalt

作　　者：王可 吕大为 WANG Ke;LYU Da-wei(School of Civil and Transportation Engineering,Henan University of Urban Construction,Pingdingshan 467000,China)

机构地区：[1]河南城建学院土木与交通工程学院,平顶山市467000

出　　处：《公路》2020年第10期45-52,共8页Highway

基　　金：河南省高等学校重点科研项目,项目编号19A560024。

摘　　要：为探究阿尔巴尼亚岩沥青(ARA)改性沥青的流变特性和抗老化性能,利用灰色关联熵对ARA制备工艺加以优化,采用多应力蠕变回复试验(MSCR)和弯曲梁流变试验(BBR),对旋转薄膜烘箱加热老化试验(RTFOT)和压力老化试验(PAV)前后的ARA改性沥青各项指标进行对比,探讨不同ARA掺量对不同老化条件下各项性能的影响。研究结果表明,ARA改性沥青具有优异的高温、低温流变性能和储存稳定性。采用灰色关联熵分析各制备工艺参数对ARA改性沥青性能的影响程度排序为:剪切时间>剪切转速>剪切温度。推荐关键工艺参数为:剪切时间为40~50min,剪切速率为4000~4500r/min,剪切温度为160~170℃。荧光显微镜观察ARA与沥青相容性良好且分布均匀。随ARA掺量增加,改性沥青的抗老化性能逐渐增加,综合考虑推荐ARA掺量为15%~20%。In order to study the rheological properties and aging resistance of Albanian rock asphalt(ARA)modified asphalt,the preparation process of ARA is optimized by using grey correlation entropy.DSR,MSCR and BBR tests are used to compare the indexes of ARA modified asphalt before and after RTFOT and PAV tests.The effects of different ARA content on the properties of different aging conditions are investigated.The results show that adding ARA can significantly improve the rheological properties of base asphalt at high temperature.Grey relational entropy analysis is used to analyze the influence of preparation parameters on the performance of ARA modified asphalt in order of shear time,shear speed and shear temperature.The recommended key technological parameters are:shear time 40-50 min,shear rate 4000-4500 r/min and shear temperature 160-170 C.Fluorescence microscopy shows that ARA has good compatibility and uniform distribution with asphalt.With the increase of ARA content,the aging resistance of modified asphalt increases gradually,and the recommended ARA content is 15-20%.

关 键 词：道路工程 阿尔巴尼亚岩沥青 灰关联熵 流变特性 抗老化性能 

分 类 号：TU535[建筑科学—建筑技术科学]