Stress-Strain Behaviour of Fibre Reinforced Concrete with Different Proportions of Polypropylene and Steel Fibre

STRESS-STRAIN BEHAVIOUR OF FIBRE
REINFORCED CONCRETE WITH
DIFFERENT
PROPORTIONS OF POLYPROPYLENE
AND STEEL FIBRE

Necessity of Hybrid Fiber Reinforced
Concrete
 Concrete is brittle in nature and could break easily (Khan and
Jafri, 2015).
 Brittleness of concrete should be reduced (Kim, et al., 2016).
 Brittleness could be reduced by adding fibers to concrete (Rai1
and Joshi, 2014).
 Performance of hybrid fiber reinforced concrete has not been
given much importance.

Objective of the Work
 To study the behaviour of concrete under axial compression due to
the addition of steel fibres (Vairagade and Kene, 2013) and
polypropylene in different proportions.
 To study the use of polypropylene (Dharan and Lal, 2016) and steel
fibres as materials to strengthen reinforced concrete.
 To study the stress-strain behaviour (de-Oliveira Jr. et al., 2010)
compressive strength (Sofi and Phanikumar, 2015), workability and
find the best combination of the materials to be used.

Methodology
 Mix M20 grade concrete (Goyal and Vikram, 2017) with different
percentages (0%, 0.5%, 1.0%, 1.5%, and 2.0%) of the hybrid fibers.
 The ratio of polypropylene and steel fibre would be varied as follows
100:0, 75:25, 50:50 so as to obtain different proportions of hybrid fibres.
 Each proportion of hybrid fibres are cast into 2 cylinders and 2 cubes.
 They are then tested using 200 Tons capacity CTM.
 Aspect ratio of steel fibre used is 55.