SNEHA K ( STM19CE028 )
SANJAY RAJAN ( STM19CE021 )
SARANG K ( STM19CE022 )
PRATHYAKSHA P ( STM19CE019 )

Steel fibers can be defined as discrete, short length of steel having ratio of its length to
diameter (i.e. aspect ratio) in the range of 20 to 100 with any of the several cross-section,
and that are sufficiently small to be easily and randomly dispersed in fresh concrete mix
using conventional mixing procedure. The studies show that with the addition of 5
percentage, 10 percentage and 15 percentage metal chips, compressive strength increased by
13.9 percentage, 20.8 percentage and 36.3 percentage respectively when compared to plain
concrete; flexural strength by 7.1 percentage, 12.7 percentage and 18.2 percentage; and
tensile splitting strength by 4.2 percentage, 33.2 percentage and 38.4 percentage.
Moreover, it was determined that with addition of steel chips, thermal diffusivity was
reduced and specific heat capacity increased. With the addition of 15 percentage metal chips,
thermal diffusivity was 25.2 percentage lower than in the reference sample, while specific
heat was 23.0 percentage higher. No effect was observed on thermal conductivity. Here we
are inserting needle shaft as steel fiber in concrete to increase compressive strength of
concrete. This idea was inspired by certain journals about effect of steel fibers on properties
of concrete.