橡塑合金改性沥青混合料路用性能研究  

Study on road performance of rubber-and-plastic-alloy-modified asphalt mixture

作　　者：李宁利 王猛 赵新坡[2] LI Ningli;WANG Meng;ZHAO Xinpo(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,P.R.China;Tianjin Expressway Group Co.,Ltd.,Tianjin 300384,P.R.China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]天津高速公路集团有限公司,天津300384

出　　处：《重庆大学学报》2022年第11期46-58,共13页Journal of Chongqing University

基　　金：天津市交通运输科技发展计划项目(2016A-01-02)。

摘　　要：为了研究橡塑合金改性沥青混合料的路用性能,采用精密开炼机将废轮胎胶粉和废塑料制备成橡塑合金,对基质沥青及混合料进行改性,采用正交试验确定AC-13型、SMA-13型橡塑合金改性沥青混合料的成型参数,通过车辙试验、浸水马歇尔试验、冻融劈裂试验和小梁弯曲试验,对橡塑合金改性沥青混合料和废轮胎胶粉改性沥青混合料的路用性能进行对比研究。结果表明,AC-13型橡塑合金改性沥青混合料的成型参数分别为油石比4.8%、拌和温度180℃、击实温度165℃;SMA-13型橡塑合金改性沥青混合料的成型参数分别为油石比6.1%、拌和温度185℃、击实温度170℃,与废轮胎胶粉改性沥青混合料相比,橡塑合金改性沥青混合料的高温稳定性和水稳定性更好,但低温抗裂性较差。In order to explore the road performance of rubber-and-plastic-alloy-modified asphalt mixture,the rubber-and-plastic alloy is prepared from waste tire rubber and powder and waste plastic by precision mixer,and used to modify the matrix asphalt and mixture.The molding parameters of AC-13 and SMA-13 rubber-and-plastic-alloy-modified asphalt mixture are determined by orthogonal test.The road performances of rubber-and-plastic-alloy-modified asphalt mixture and waste-tire-rubber-and-powder-modified asphalt mixture are compared by rutting test,immersion marshall test,freeze-thaw splitting test and beam bending test.The results show that the molding parameters of AC-13 rubber-and-plastic-alloy-modified asphalt mixture are asphalt to aggregate ratio 4.8%,mixing temperature 180℃and compaction temperature 165℃,and the molding parameters of SMA-13 rubber-and-plastic-alloy-modified asphalt mixture are asphalt to aggregate ratio 6.1%,mixing temperature 185℃and compaction temperature 170℃.Compared with waste-tire-rubber-and-powder-modified asphalt mixture,rubber-and-plastic-alloy-modificd asphalt mixture has better high-temperature stability and water stability,but poor low-temperature crack resistance.

关 键 词：道路工程 路用性能 施工参数 橡塑合金 改性沥青混合料 

分 类 号：U414[交通运输工程—道路与铁道工程]