高速公路SMA混合料配合比设计及路用性能研究

针对京珠高速公路粤境北段路线纵坡大,途经地区地形复杂、降雨量大、多雾且能见度差、夏季高温、冬季冰冻、交通量大且超载严重等恶劣条件,采用SBS改性台湾沥青,通过对改性沥青玛蹄脂性能分析、SM A矿料级配优化、体积特征控制参数严格筛选,从19种初试SM A混合料中优选出7种具有代表性的SM A混合料,通过路用性能检验,成功铺筑了试验段。

Gradation Design of SMA Mixture in Jing-Zhu Expressway and Research on Road Performances

In the north of Jing-Zhu Expressway,there are many unfavorable features,such as large longitudinal grade of line,complicate topographic form,large precipication,heavy fog and poor ability of sight,high temperature in summer,freezing in winter,heavy traffic and serious surcharge in passing area.Aiming at these,in this research SBS modified Taiwan asphalt is used.Furthermore,by analyzing performance of modified asphalt matrix,optimizing mineral aggregate gradation of SMA and selecting volumetric characteristic controlling indexes strictly,seven kinds of typical SMA mixtures are selected from 19 kinds of tentative mixtures.Then the road performances are tested. So the tested road is laid down successfully.