A-30硬质沥青及其混合料性能试验研究

Experimental investigation on property of hard asphalt A-30 and asphalt mixture

A-30硬质沥青是指粘稠度相对较大的基质沥青,具有针入度小、粘稠度大、劲度大、软化点高、延度小的特点,其高温性能优良,温度敏感性好,低温性能略差。针对硬质沥青及其混合料的性能指标,尤其是高温性能、低温性能和疲劳性能,同时与石油沥青A-70、SBS改性沥青进行对比试验研究,以全面了解硬质沥青的使用性能,为硬质沥青的应用提供依据,也为夏季炎热地区、重轴载道路和长大纵坡路段的高等级公路沥青路面建设提供参考。

Hard asphalt A-30 is a kind of high viscosity base asphalt which characterized by low penetration, high viscosity, high stiffness, high soft point, and low ductility, it has satisfactory hightemperature stability, better temperature susceptibility, only unsatisfactory low-temperature performance. The author analyses the high-temperature stability, the low-temperature performance, and the fatigue resistance between hard asphalt mixture,petroleum asphalt A-70 mixture and SBS modified asphalt mixture by general comparative test and study ,attain to sufficiently understanding of property of hard asphalt and asphalt mixture, providing experiment basis for the application and expansion of hard asphalt, also providing a kind of new way of thinking and the method of solving problem the asphalt pavement construct engineering for high grade highway in southern hot and damp region, heavyload road and long and steep downhill road.