关键词: 沥青路面;圆柱形芯样;抗车辙性能;现场;评价标准

Abstract: To evaluate the anti-rutting performance of asphalt pavement, it is necessary to set up the evaluation standard of rutting resistance for asphalt pavement.Firstly, the rutting tests based on plate specimen and Superpave Gyratory Compactor ( SGC) specimen were carried out, and the conversion formula of dynamic stability of two kind specimens was established.Secondly, the asphalt mixture was taken from construction site to shape plate specimen, and the cylindrical core sample in the corresponding position were also drilled.The dynamic stability of two kind specimens was used to modify the conversion formula.Again, the rutting test results of core samples with different thickness were selected to complete the thickness correction for conversion formula.Finally, combined with the dynamic stability technical requirements of asphalt mixture in current specifications, the anti-rutting performance evaluation standard of asphalt pavement based on core samples was established.The results show that when the thickness of modified asphalt pavement core sample is 4 cm, 5 cm or 6 cm, the dynamic stability should not be less than 2800 time/mm, 2400 time/mm and 2250 time/mm at 70 ℃ respectively. For raw asphalt pavement, the dynamic stability at 60 ℃ should not be less than 3450 time/mm and 3200 time/mm respectively when the thickness of core sample is 5 cm or 6 cm.

Key words: asphalt pavement;cylindrical core sample;anti-rutting performance;site;evaluation standard