Biaxial flexural behavior of ultra-high-performance fiber-reinforced concrete with different fiber lengths and placement methods

Title
Biaxial flexural behavior of ultra-high-performance fiber-reinforced concrete with different fiber lengths and placement methods
Author
류두열
Keywords
Ultra-high-performance fiber-reinforced concrete; Biaxial flexure; Fiber length; Placement method; Fiber distribution characteristics; Image analysis
Issue Date
2015-10
Publisher
ELSEVIER SCI LTD
Citation
CEMENT & CONCRETE COMPOSITES, v. 63, Page. 51-66
Abstract
This study investigates the effects of fiber length and placement method on the biaxial flexural behavior and fiber distribution characteristics of ultra-high-performance fiber-reinforced concrete (UHPFRC). A number of UHPFRC panels including three different fiber lengths were fabricated using two different placement methods, and an image analysis was performed to quantitatively evaluate the fiber distribution characteristics such as fiber orientation, fiber dispersion, and number of fibers per unit area. The biaxial flexural performances including load carrying capacity, energy absorption capacity, and cracking behavior were found to be improved with the increase in fiber length up to 19.5 mm. The biaxial flexural performances were also influenced by the placement method; the specimens with concrete placed at the center (maximum moment region) showed better flexural performances than those with concrete placed at the corner. These observations were confirmed by the image analysis results, which showed poorer fiber orientation and fewer fibers across the crack surfaces at the maximum moment region for the specimens with concrete placed at the corner, compared with their counterparts. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0958946515300135?via%3Dihubhttp://hdl.handle.net/20.500.11754/28508
ISSN
0958-9465; 1873-393X
DOI
10.1016/j.cemconcomp.2015.07.011
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ARCHITECTURAL ENGINEERING(건축공학부) > Articles
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