Testing Methods for Deformation Characterization on 3D Printed Carbon Fiber-Reinforced Cementitious Composites (2022-09)¶

Carbon short fiber reinforced concrete (CSFRC) has impressive properties that exceed traditional building materials. One reason of increased strength of CSFRC is the occurrence of a strain-hardening behaviour where multiple microcracks appear. To achieve deeper knowledge on this degradation process, we use different testing methods like X-ray computed tomography (CT), acoustic emission (AE) analysis and current measurements. Although all these techniques are powerful by themselves, this paper focuses on combining the techniques and implement them partially in-situ. The complex measurement setups with trigger systems help to mutually verify the different techniques. As a lot of the applied approaches are non-destructive testing methods our goal is to develop a foundation for future structural health monitoring and to predict final component failure.