The concrete microstructure was successfully reconstructed using the complementarity of X-ray and neutron computed tomography (CT). Neither tomogram alone was found to be suitable to properly describe the microstructure of concrete under this study. However, by merging the information revealed by the two modalities, and using image segmentation, noise reduction, and image registration techniques we reconstruct the concrete microstructure. Void, aggregate, and cement paste phases are successfully captured down to the images' spatial resolution, even though the aggregate consists of multiple minerals. The coarse-aggregate volume fraction of the reconstructed microstructure was similar to that of the mixing proportions. Furthermore, image-based finite element analysis is performed to demonstrate the effects of microstructure on stress concentration and strain localization.

使用 X 射线和中子计算机断层扫描 (CT) 的互补性成功地重建了混凝土微观结构。在本研究中，没有发现单独的断层扫描图适合正确描述混凝土的微观结构。然而，通过合并两种模态揭示的信息，并使用图像分割、降噪和图像配准技术，我们重建了具体的微观结构。空隙、骨料和水泥浆相被成功捕获到图像的空间分辨率，即使骨料由多种矿物质组成。重构微观结构的粗骨料体积分数与混合比例相似。此外，