An experimental investigation is carried out to study the toughness of polymer modified steel fiber reinforced concrete. Volume fraction of steel fibers is varied from 0% to 7% at the interval of 1% by weight of cement. 15% SBR latex polymer was used by weight of cement. Cubes of size 150 × 150 × 150 mm for compressive strength, prism specimens of size 150 mm × 150 mm × 700 mm for flexure strength and, specimen of size 150 × 150 × 150 mm with 16 mm diameter tor steel bar of length 650 mm embedded in concrete cube at the center for bond test were prepared. Various specimens were tested after 28 days of curing. Area under curve (toughness) is measured and mentioned in this work.

The results of an experimental investigation to study the effects of hooked steel fibers with varying dosage and polymer latex with fixed dosage in concrete are studied. In this experimental study, varying volume fraction of hooked steel fibers from 0% to 7% by weight of cement at the interval of 1% of fiber and SBR latex polymer of fixed volume of 15% by weight of cement were used. All specimens of only fiber content were water cured and specimens of polymer with fiber content were air cured. At the end of 28 days of curing period, destructive tests were carried out on concrete specimens to determine the elastic constants of fiber reinforced concrete and polymer modified steel fiber reinforced concrete. For the analysis of structures, the elastic constants are very important. The elastic constants are static modulus of elasticity (Es), dynamic modulus of elasticity (Ed), Poisson’s ratio (μ) and modulus of rigidity (G), etc.