Experimental investigation on flexural capacity of concrete beams reinforced using kenaf rebars
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Date
2011-01-01
Authors
Chong Chee Hoe
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Abstract
Steel rebars are widely used in construction of the concrete structure due to
their efficiency and economic benefit. However, it faces the corrosion problem when
the structures are exposed to aggressive environments. Fibers rebars can be used as an
alternative to replace the conventional steel in order to overcome the corrosion problem.
Experimental study on flexural behavior of concrete beam reinforced with kenaf fiber
rebars has been carried out. In the experiment, three types of concrete beams reinforced
with different arrangement of reinforcement were prepared. All beam were tested under
four points bending test. The behaviors of these beams were investigated with the loadstrain characteristics, concrete and reinforcement strain distribution, cracking behavior,
change of neutral axis and mode of failure. The experimental results on the flexural
behavior indicated that the kenaf rebars reinforced specimens have a poorer
performance as compared to conventional concrete beam. The shape of arrangement
for the reinforcement greatly influences the flexural behavior of specimens. Moreover,
the entire kenaf reinforced concrete beam showed extensive cracking pattern due to
bonding between the rebars and concrete. The experimental ultimate loading sustained
by the specimens has a small deviation from the theoretical value.