巨粒式沥青混合料级配研究  

Research on Gradation of Giant Particle Asphalt Mixture

作　　者：廖亚雄 袁盛杰 魏威 LIAO Yaxiong;YUAN Shengjie;WEI Wei(Hubei Provincial Communication Planning and Design Institute Co.,Ltd.,Wuhan 430051,China)

机构地区：[1]湖北省交通规划设计院股份有限公司,武汉430051

出　　处：《交通科技》2024年第6期35-39,共5页Transportation Science & Technology

摘　　要：为确定公称最大粒径37.5 mm的巨粒式沥青混合料最优级配,通过逐级填充、CBR试验和路用性能测试,发现粗集料在31.5~37.5,19~31.5,9.5~19 mm粒径比例为39∶21∶20时性能最优。对于细集料,当i值为0.55~0.75时,高温性能与水稳定性先增后减,低温性能持续下降。与ATB-30相比,i值为0.7时SLSM-40性能最佳。To determine the optimal gradation for giant-grained asphalt mixture with a nominal maximum particle size of 37.5 mm,the graded filling,CBR tests,and road performance tests were conducted.It was found that the optimal performance is achieved when the proportion of coarse aggregates is 39∶21∶20 in the size ranges of 31.5~37.5 mm,19~31.5 mm,and 9.5~19 mm.For fine aggregates,when the i-value is between 0.55 and 0.75,the high-temperature performance and water stability increase first and then decrease,while low-temperature performance continues to decline.Compared to ATB-30,SLSM-40 exhibits the best performance when the i-value is 0.7.

关 键 词：巨粒式沥青混合料 CBR 逐级填充 i法 路用性能 

分 类 号：U416.01[交通运输工程—道路与铁道工程]