不同类型沥青混合料路用性能研究

不同级配沥青混合料对路用性能有着重要的影响。本文针对大粒径沥青混合料和沥青玛蹄脂碎石混合料,通过高温车辙试验、低温弯曲试验以及疲劳试验,研究了其路用性能,同时与常用的密级配沥青混合料作比较,结果表明:改性沥青可显著改善沥青混合料的技术性能,大粒径沥青混合料和沥青玛蹄脂碎石混合料也具有优良的路用性能,其中大粒径沥青混合料在高温抗永久变形和耐疲劳性方面要优于沥青玛蹄脂碎石混合料,而沥青玛蹄脂碎石混合料在低温抗裂性方面要优于大粒径沥青混合料。

Study on pavement performance of different types of asphalt mixtures

The different gradation asphalt mixtures have great influence on pavement performance. The paper unitized wheel tracking test at high temperature, the bend test at low temperature and bend fatigue test to study pavement performance of SMA and large size asphalt mixture (LSM), and then it is compared with dense gradation asphalt mixture. The results show that modified asphalt can improve significantly technical performance, SMA and LSM have super pavement performance, the resistance to deformation at high temperature and resistance to fiatigue of LSM is better than that of SMA, but the performance resistance to crack of SMA at low temperature is better than LSM.