Jose, James
(2016)
Fracture Behaviour of Hybrid Synthetic Fiber Reinforced Concrete.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
Fibers have been used as discrete randomly distributed reinforcement to strengthen a material
weak in tension. A concrete beam containing fibers suffers damage
by gradual development of
single or multiple cracks with increasing deflection, but retains some degree of structural
integrity and post
-
crack resistance even under considerable deflection. A composite can be
termed as
hybrid
, if two or more types of fiber
s are rationally combined to produce a composite
that derives benefits from each of the individual fibers and exhibits a synergetic response. In
this study, macro polypropylene fibers with micro Polypropylene fibers are been used. Flexural
tests are done f
or Hybrid Synthetic Fiber Reinforced concrete (HFRC) and are compared with
Synthetic Fiber Reinforced Concrete (SFRC) of the same fiber volume fraction. It was found
that HFRC retains the same toughness as SFRC when the concrete is mature and a better
toug
hness at early age. The strain distribution information obtained from the DIC is used to
study the crack growth in the beams. Crack bridging stresses contributed by hybrid
-
synthetic
fibers are determined.
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