混凝土计算机断层成像试验图像细观研究多集中在二维横切面上，而混凝土计算机断层成像三维重建研究非常少，使混凝土计算机断层成像试验图像细观研究受到了局限，不利于全面分析在各个应力情况下混凝土的受力情况.本文提出一种可视化平台下基于改进光线投射法的混凝土计算机断层成像图像三维重构新技术，并进行可视化系统的实现.结果表明：本文提出的混凝土计算机断层成像图像三维重构方法快速、真实，为建立准确的混凝土材料数值细观模型提供了一种有效辅助方法，具有重要的应用意义.

The study of concrete based on CT Images has been a heated issue in recent years. Normally the study focuses on 2-D meso--concrete image, but sutdy on the construction of 3-D meso-concrete are not paid much attention to which limits the scope of the research and intervene with the overall analysis of calculation on the forces in any circumstances. Owing to this point, The author offers a new tech-VTK system based on the ray-casting which also can achieve visualization. After tests, the new method is obviously more accurate and effective in guidance to build concrete material numerical model. In short, it is instructive and significant to solve the problems in this field.