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http://dx.doi.org/10.12989/acc.2020.10.3.257

Effect of macro and micro fiber volume on the flexural performance of hybrid fiber reinforced SCC  

Turk, Kazim (Department of Civil Engineering, Engineering Faculty, Inonu University)
Kina, Ceren (Department of Civil Engineering, Faculty of Engineering and Natural Sciences, Malatya Turgut Ozal University)
Oztekin, Erol (Organized Industry Region Vocational High School, Construction Technology Program, Inonu University)
Publication Information
Advances in concrete construction / v.10, no.3, 2020 , pp. 257-269 More about this Journal
Abstract
The aim of this study is to investigate the flexural performance of hybrid fiber reinforced self-compacting concrete (HFRSCC) having different ratio of micro and macro steel fiber. A total of five mixtures are prepared. In all mixtures, the sum of the steel fiber content is 1% and also water/binder ratio is kept constant. The amount of high range water reducer admixture (HRWRA) is arranged to satisfy the workability criteria of self-compacting concrete. Four-point bending test is carried out to analyze the flexural performance of the mixtures at 28 and 56 curing days. From the obtained load-deflection curves, the load carrying capacity, deflection and toughness values are investigated according to ASTM C1609, ASTM C1018 and JSCE standards. The mixtures containing higher ratio of macro steel fiber exhibit numerous micro-cracks and, thus, deflection-hardening response is observed. The mixture containing 1% micro steel fiber shows worst performance in the view of all flexural parameters. An improvement is observed in the aspect of toughness and load carrying capacity as the macro steel fiber content increases. The test results based on the standards are also compared taking account of abovementioned standards.
Keywords
hybrid fiber reinforced; self-compacting concrete; toughness; load carrying capacity; deflection;
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Times Cited By KSCI : 2  (Citation Analysis)
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