Dynamic Stability Control Criterion for an Asphalt Surface Course under Different Traffic Volumes

To control the rutting resistance of a semi-rigid-base asphalt pavement under different traffic volumes, a rutting test is conducted to simulate the actual pavement internal temperature field on full-depth asphalt surface course samples excavated from different sections (different corresponding traffic volumes) and rutting depths in an expressway reconstruction and extension project. The relationship between dynamic stability and rutting depth on the main lane is analyzed. The dynamic stability control criteria, which are dynamic stabilities corresponding to 15 mm rut depth, to fit the traffic volumes of different sections are determined. The accumulative equivalent axles of different sections are collected and calculated. The relationship between the dynamic stability control criterion of each section and its accumulative equivalent axle is analyzed to obtain a fitting equation. A dynamic stability control criterion for the asphalt pavement structure at heavy traffic level is suggested based on this fitting equation. Afterward, a method of determining the dynamic stability control criterion for the entire asphalt surface course under different traffic volumes is recommended.