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Asphalt Surface Structure Combination Design Based on the Dynamic Stability of Asphalt Surface Course and Asphalt Mixture

In order to design the structure combination of semi-rigid base asphalt pavements based on the Dynamic Stability(DS) of asphalt surface course and asphalt mixture, the Wheel Tracking Test(WTT) on three-layers asphalt mixture specimens and its each layer specimen was carried out. Based on these laboratory test data, a formula to calculate full-thickness specimen’s DS from its each layer’s DS and thickness was developed firstly. Secondly, some full-thickness specimens were cut from the asphalt surface of an expressway which had served for many years. WTT was also carried out on these field specimens. Based on analyzing the relationship between the field specimens’ DS and the corresponding rut depth at the cutting location of the expressway pavement, a DS controlling standard of the asphalt surface was suggested to suit the traffic volume of the expressway. Lastly, various asphalt surface structure combination schemes were obtained according to each layer’s DS control standard decomposing from the DS control standard of asphalt surface as mentioned above. Then the optimal structure combination scheme was suggested.