The long term performances of micro-surfacing rut-filling vary widely and the related research is inadequate. A special full-scale testing section was constructed as the representative expressway type of Chinese semi-rigid pavement structure and the accelerated pavement testing facility MLS66 was adopted to simulate the 150kN heavy vehicle axle load with lateral distribution. The high temperature condition was achieved by the special heat radiation devices. Micro-surfacing rut-filling was overlaid on the representative structure loaded by about 400,000 axle load number and then undertook another about 300,000 axle load number. The testing results indicate that the rutting development after the micro-surfacing experiences the compaction phase and transition phase and stability phase. The corresponding Rutting Depth and Rutting Compaction Area decreases with load number, presenting the trend from significant increasing to final constant. The Permeability Coefficient is not sensitive to the load number and the Texture Depth stays at the acceptable level with the increasing of load number. It is concluded that the micro-surfacing is effective for delaying the rutting and maintaining the adequate surface functions but is not a useful technology to cure the rutting resulted for the heavy traffic condition.
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