Measurements of Internal Energy Dissipation in Ultra-High Performance Concrete
Publication Name: Proceedings of the 3rd International Conference on Tomography of Materials and Structures
Publication URL: https://meetingorganizer.copernicus.org/ICTMS2017/ICTMS2017-168.pdf
The overall role of fiber reinforcements in cement-based composites is well known and well documented. In ultra- high performance concrete (UHPC), fibers facilitate an array of energy dissipation mechanisms that transform a highly brittle composite to a relatively ductile one. While some of these dissipation mechanisms, (e.g. fiber pullout, bridging, crack branching) are well known and well documented, less well documented are quantitative experimental analysis of the relative contributions to overall energy dissipation. The objectives of this work are to measure energy dissipation in fiber reinforced UHPC loaded in a split cylinder configuration using x-ray computed tomography (CT). 3D CT images made of the specimen before and after the test can provide a detailed picture of damage accumulation and other internal changes that result from loading.