? In this paper,the flexural fatigue property of specially early strength repairing concrete is studied and the fatigue equations of concrete is established.

According to the research on whole curves of strain-stress of concrete materials,this paper finds there was an evident features of stages,and the discrete feature of curve is often in strain-softening stage.

Scale effects of strength on concrete material;

Feature extraction of concrete material's AEmeasuring based on high-order spectrum

Various materials,such as reinforced concrete materials,polymer(rubbers,plastics and paints),lubrication or adhesive material,materials for rail,wheel,bearing,brake,contact strip and so on,and new materials such as super conductive materials,are being used or re- searched for future use in railway systems.