The purpose of studying concrete using X-ray CT is to analyze concrete meso-crack evolution process and explain concrete macroscopic strength and strain character based on concrete CT images.

Based on real-time computerized temography(CT) experiment on concrete samples with three sets of cracks under uniaxial loading,some new phenomena and laws on meso-crack and meso-damage by numerical computation for non-interpenetrated jointed media are presented;and the effect of six material parameters on the meso-damage of sample is predicted by Monte Carlo probabilistic design method.