Steel fibers reinforced self-compacting concrete – behavior to bending


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Title: Steel fibers reinforced self-compacting concrete – behavior to bending

Author(s): A. R. BARROS, P. C. C. GOMES, A. S. R. BARBOZA

Publication: IBRACON

Volume: 4

Issue: 1

Appears on pages(s): 49 63

Keywords: Self-compacting concrete; Steel fibers; Reinforced concrete beams; Four-point bending test.

Date: 3/1/2011

This study was carried out to investigate the behavior of self-compacting concrete beams reinforced with steel fibers subjected to the bending. For such, steel fibers with a ratio l/d of 50, in a volume fraction of 1% were used. Reinforced concrete beams with dimensions of 12,5 x 23,5 x 132 cm were in four-point bending, at 28 days of age. During the test were taken strain measurements in the stirrups and the longitudinal reinforcement bars, besides measurements of the strain in the compressed region of concrete and of deflections at mid-span. The data collected showed that the addition of steel fibers in self-compacting concrete (SCC) promotes a notable increase in the beam’s resistant capacity, resulting in lower deflections at mid-span, lower deformations of the reinforcement bars, both transversal as longitudinal, and improved cracking control, compared to control beams produced with conventional concrete, with or without steel fibers.

Brazilian Institute of concrete, International Partner Access.

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