A method to analyze fractured surfaces of cement based composite materials is introduced. In this study, we measured fractured surfaces of mortar after a wedge splitting test by using two types of equipment. Then we analyzed the properties of the fractured surface such as the real fractured surface area, distribution of the local angles and the fractal dimension. After analyzing the fractured surface, it is suggested that using the fractal dimension is a correct way to represent the real area of fractured surface, and distribution of the local angles of surface area is helpful for the realization of the fracture mechanism of cementitious composite materials.
