In situ observation of fracture processes in high-strength concretes and limestone using high-speed X-ray phase-contrast imaging.

ABSTRACT: The mechanical properties and fracture mechanisms of geomaterials and construction materials such as concrete are reported to be dependent on the loading rates. However, the in situ cracking inside such specimens cannot be visualized using traditional optical imaging methods since the materials are opaque. In this study, the in situ sub-surface failure/damage mechanisms in Cor-Tuf (a reactive powder concrete), a high-strength concrete (HSC) and Indiana limestone under dynamic loading were investigated using high-speed synchrotron X-ray phase-contrast imaging. Dynamic compressive loading was applied using a modified Kolsky bar and fracture images were recorded using a synchronized high-speed synchrotron X-ray imaging set-up. Three-dimensional synchrotron X-ray tomography was also performed

SUBMITTER: Parab ND 

PROVIDER: S-EPMC5179972 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature