3. International Conference on Civil and Environmental Engineering, (ICOCEE – Çeşme 2018), İzmir, Türkiye, 24 - 27 Nisan 2018, cilt.1, ss.226-236
Concrete is a superior construction material
due to its cost and excellent capability in the compression load bearing zone.
However, concrete easily fractures under tensile loading. Therefore, reinforcement is installed in order to offset
the tensile forces subjecting to concrete. So far, brittleness of
concrete has been tailored to higher bending resistance behavior thanks to the
utilization of fibers. Incorporating of fibers into concrete matrix not only
enhances the bending properties but also affects other mechanical and durability
properties. Although advantages of fiber inclusion have been proved, the effect
of fiber type still remains to be further investigated for fiber reinforced
concrete specimens. In this study, a total of 112 C20/25 concrete specimens
(15x15x15 cm 56 cubic specimens, 15x30 cm cylinder specimens and 10x10x40 cm
prismatic specimens) were produced and investigated taking into account of
their compression, flexural, splitting strengths and water absorption rates.
Experiments were carried out at the age of 7 and 28 days
for each specimen group. All experiments were examined in detail and
advantages/disadvantages of three fiber types were evaluated individually on
the account of obtained data. Results indicate that length to diameter ratio
and characteristic tensile strength of fibers have an influence on all
mechanical properties irrespective of fiber volume.