In order to build real 3-D meso-concrete model to analyze the damage-fracture mechanism, CT images were pretreated in the MIMICS software of 3-D digital image processing, concrete real meso-level structure was reconstructed, and the data were imported the ANSYS, thus the 3-D finite element numerical model was constructed, which could be used to describe the meso heterogeneity of concrete. On the basis of the results, the meso finite element model was numerically simulated. By comparing the simulation results with other finite model analyzing results, it was shown that the concrete of 3-D reconstruction model could overcome the shortage of traditional random aggregate model and actually reflected mechanics properties of concrete.
