Abstract: For the study of dynamic mechanical rheological property and the comparison of high-temperature performance of hard-grade asphalt before and after aging，DSR was employed to analyze the rheological property，and the rutting experiment was carried out to compare the high-temperature performance between hard-grade asphalt and 4% anti-cracking agent modified asphalt.Experimental results show that：GTS，which is obtained by the regression of G*，confirms that the temperature sensitivity of hard-grade asphalt before and after aging is lower than that of base asphalt and SBS modified asphalt.In the experimental temperature range，the variation trends of hard asphalt viscoelasticity before and after aging are similar; the increase of temperature can lower the elasticity of asphalt and strengthen viscous behavior.However，the aging process increases the temperature in which viscous behavior begins to occupy the dominant position，which means that the aging enhances the elastic-viscosity transition temperature of hard asphalt.The comparison result of the rutting factor and the degree of dynamic stability is that：the hard-grade asphalt after aging is superior to the hard-grade asphalt，and the hard-grade asphalt is superior to the anti-cracking agent modified asphalt.As a conclusion，the hard-grade asphalt has excellent ability to resist high temperature deformation，which can be used as raw material or modifying agent for the asphalt pavement in the south high temperature areas and the research and development of the anti-rutting agents.

Key words: highway engineering, hard-grade asphalt, rheological property, anti-rutting ability

摘要： 研究了老化前后硬质沥青的动态力学流变性能并对高温性能进行比较，采用DSR对流变性能进行分析，利用车辙试验对其高温性能与4%抗辙裂剂改性沥青进行比较。研究表明：G*回归得到的GTS证实老化前后硬质沥青的温度敏感性均低于SBS改性沥青和基质沥青；在实验温度内，老化前后硬质沥青的黏弹性变化趋势相似，温度升高使得材料的弹性作用减弱，黏性行为增强，但老化后沥青黏性行为开始占据主导地位的温度高于老化前，表明老化提升了硬质沥青的弹-黏转变温度。车辙因子、动稳定度的对比结果为：老化后硬质沥青＞硬质沥青＞抗辙裂剂改性沥青，两者综合证实了硬质沥青具有优异的抵抗高温变形的能力，其可以作为原料或改性剂用于南方等高温地区沥青路面的铺设及抗车辙剂类产品的研发。

关键词: 道路工程, 硬质沥青, 流变性能, 抗车辙性能