Three concrete mixes with different water-to-binder ratios and dosages of cement replacement materials(fly ash and slag powder)were exposed to alternate carbonation and freezing-thawing actions.
Analysis of railway subgrade refers to static stress and dynamic stress,and the design of ordinary railway subgrade with lower train speeds usually transfers dynamic stress to static.For high-speed ra
This study aims to provide a robust strategy for predicting the time to the recurrence of rail defects at the same location by using the conditional frailty cox model.The model is built based on a US