关键词: 双层一次摊铺路面, 摊铺工艺, 结构层厚度, 混合料类型, 疲劳性能

Abstract: The effects of paving technology, mixture type and structural layer thickness on fatigue performance of asphalt pavement were studied. The results show that compared with traditional paving technology, the fatigue life of asphalt pavement with double-deck one-time paving technology is increased by 54% under the same stress. The combination of 3 cm thickness of upper layer and 7 cm thickness of lower layer of double-deck one-time paving pavement and mixture type of upper layer AC-13 and lower layer AC-20 have the best fatigue performance. And the fatigue life is increased by 113%, compared with the traditional stratified paving typical pavement. For asphalt mixture under high stress, the anti-fatigue performance and stress change sensitivity of double-deck one-time paving technology are the best. Paving technology is superior to traditional paving technology, which is mainly reflected in the fact that the fatigue equation intercept a value of asphalt mixture in double-deck one-time paving technology is larger than that of Marshall method, while the slope value b is just the opposite. In order to improve the fatigue performance of pavement effectively, it is suggested that the structure of double-deck one-time paving pavement should be composed of upper layer 3 cm AC-13 and lower layer 7 cm AC-20.

Key words: double-deck one-time paving pavement, paving technology, structural layer thickness, mixture type, fatigue performance