Fatigue Analysis of Cement-Stabilized Macadam Using Fracture Toughness

The fatigue life of cement-stabilized macadam specimen beams was analyzed using the fracture toughness index. The damage evolution equation controlled by the tension stress was given, whose coefficients were back-calculated based on the fracture toughness control index using partial fatigue tests data. The fully coupled stress-damage method was used. The result shows that the damage evolution equation based on the fracture toughness control index has better life prediction ability comparing with the S-N equation used usually. The method used in the paper can provide a calculation model to predict the life of practical road structure.