Journal
CEMENT AND CONCRETE RESEARCH
Volume 95, Issue -, Pages 164-177Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2017.02.017
Keywords
UHPFRC; Fiber orientation; 3D visualization; X-ray CT; Flexural properties
Funding
- Japan Society for the Promotion of Science
- Grants-in-Aid for Scientific Research [15K06164] Funding Source: KAKEN
Ask authors/readers for more resources
In this study, fiber orientation in ultra-high-performance fiber-reinforced-concrete (UHPFRC) with different formwork geometry was evaluated using visualization model concrete and via analysis involving 3D visualization based on X-ray computed tomography (CT). Differences in fiber orientation in the height direction were first reviewed. Furthermore, the influence of flowability and casting time on the fiber orientation and mechanical properties of UHPFRC were examined. The results indicated that flowability dictates eventual fiber orientation in parts close to the surfaces of formwork. The use of UHPFRC with superior flowability results in more fibers being oriented parallel to the longitudinal direction of slabs in comparison to UHPFRC with inferior flowability. It was also found that flowability and casting time can have strong influences on the mechanical properties of UHPFRC. Residual flexural strength after initial cracking exhibited perfect linear dependence on the effective number of fibers at fracture planes. (C) 2017 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available