Carbon fiber concrete（ CFC） has good force sensitive properties and can be made into sensor and used in condition monitoring of concrete structure. The tests before and after aging and different impact height is carried out using impact action of free-falling steel ball striking cylindrical specimens. Test results show that resistance change of specimens can make a quick response to impact action; specimens before aging are at elastic stage when loading is small

resistance decreases as load gets higher. Specimens will be at elasto-plastic stage after aging

resistance increases as load gets higher.