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http://dx.doi.org/10.14190/JRCR.2017.5.1.014

The Effects of Mixture Rate and Aspect Ratio of Steel Fiber on Mechanical Properties of Ultra High Performance Concrete  

Choi, Jung-Gu (Department of Architecture, Korea National University of Transportation)
Lee, Gun-Cheol (Department of Architecture, Korea National University of Transportation)
Koh, Kyung-Taek (Structural Engineering Research Division, KICT)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.1, 2017 , pp. 14-20 More about this Journal
Abstract
Ultra high performance concrete is inevitably used in case of skyscraper and super long span bridge. In general, the flexural and the tensile strengths of concrete are lower than the compressive strength, so brittle cracks occur and energy absorption ability is lowered. In order to solve this problem, this study is intended to examine the effect of the steel fiber volume fraction and aspect ratio on the mechanical properties of ultra high performance concrete. In series I, 20-mm straight steel fiber was added with a volume fraction of 0, 1.0, 1.3, 1.5 and 2.0%. In series II, 16-mm steel fiber was added with a volume fraction of 0, 1, and 1.5%, and then mechanical properties were examined according to aspect ratio. In the results of experiment, a difference in compressive strength was insignificant. However, regarding the flexural strength and tensile strength, as the volume fraction and aspect ratio increased, flexural performance and tensile performance improved.
Keywords
Ultra high performance concrete; Steel fiber; Aspect ratio; Mechanical property;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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