Research on the Fatigue Behavior of CA Mortar Used in Ballastless Slab Track of High Speed Railway

CA mortar is the key component in the structure of slab track and its fatigue performance is critical to the durability and safety of high speed railway.The paper investigated its fatigue behavior under different stress levels(0.9,0.85,0.8,0.75,0.7,0.65) and temperatures(20 ℃,-20 ℃) with the loading frequency of 10 Hz and the sine wave.Results indicate that the fatigue life of CA mortar is logarithmically linear with stress levels and the viscoelasticity of CA mortar guarantees a good fatigue performance at-20 ℃.