This document discusses steel fiber reinforced concrete (SFRC). SFRC increases the structural integrity of concrete by adding short, discrete steel fibers that are uniformly distributed and randomly oriented. The document outlines the materials used including cement, aggregates, water, and steel fibers. It describes the mix design process and percentages of steel fibers tested. Beams and cubes were cast with the concrete mixtures and cured before testing to determine the compressive and flexural strengths of the SFRC. The results and conclusions are summarized, with references provided.

1. STEEL FIBER REINFORCED
CONCRETE
Project by
Shaswat Mohan Routray
Pravash Sathpathy
Nibedta Hansda
Guided by
Mrs. Priyadarshini Das

2. Contents

3. INTRODUCTION
Concrete is strong in compression but weak in
tension. As concrete is brittle material the
failure in concrete due to tension is sudden.
There are also cracks in concrete due to
shrinkage and these micro cracks propagate and
leads to failure.
To safeguard the concrete against flexural cracks
fibres are used in concrete section which is
known as fibre reinforced concrete

4. Fiber reinforced concrete
• Fiber- reinforced concrete (FRC) is concrete containing fibrous
material which increases its structural integrity. It contains
short discrete fibres that are uniformly distributed and
randomly oriented. Fibres include steel fibres, glass
fibres, synthetic fibres and natural fibres – each of which lend
varying properties to the concrete. In addition, the character
of fibre-reinforced concrete changes with varying concretes,
fibre materials, geometries, distribution, orientation, and
densities.

5. Steel Fibres
• Write abt steel fibres and pic

6. Objective

7. Material Used
• Cement
• water
• Coarse aggregates
• Fine aggregates
• Steel fibres

8. Cement
• The cement used is pozzulana portland
cement manufactured by Ultratech cement.
• Specific gravity of cement = 3.05
• Fineness modulus of cement = 2.9

9. Coarse Aggregates
• Coarse agregates avialable locally were used.
• Specific gravity of aggregates =
• Water absorbtion by the aggregates= 1.30 %
• The sseive analysis of 20mm and 10 mm
aggregates are shown below

11. Fine aggregates
• Locally avialable sand from banks of river
Brahmani was used .
• Specific Gravity of sand = 2.57
• Seive analysis of sand was done and the sand
was found to be of zone II.

13. Steel Fibres
Corrugated steel fibres were used in this project
with the following properties:-
• Length = 25 mm
• Diameter of steel fibre = 0.50 mm
• Aspect ratio = 50

14. Methodology
• Calculation of mix design.
• Casting of cubes and beams.
• Curing in water for required number of days.
• Testing of cubes and beams for compressive
strength and flexural strength respectively.

15. Mix Design
For 1 m3 of M25 grade concrete
• Cement = 400 Kg
• Water = 200 Kg
• Coarse aggregates = 1185.83 Kg
• Fine aggregates = 671.90 Kg

16. Mix Design For SFRC For Varying
Percentage Of Steel Fibre
Sl.No. Steel
fibre in
%
W/C
ratio
Cement
(in
kg/m3 )
Water
(in
kg/m3 )
Coarse
aggregat
es (in
kg/m3 )
Fine
aggregat
es (in
kg/m3 )
Steel
fibre (in
kg/m3 )
1 0.25 0.50 400 200 1185.83 671.90 100
2 0.50 0.50 400 200 1185.83 671.90 200
3 0.75 0.50 400 200 1185.83 671.90 300
4 1.0 0.50 400 200 1185.83 671.90 400
5 1.25 0.50 400 200 1185.83 671.90 500
6 1.5 0.50 400 200 1185.83 671.90 600

17. Casting Of The Concrete Beams And
Cubes
• The required mix was prepared.
• Steel fibres are uniformly put on concrete and
mixed thoroughly.
• The concrete was casted in cubes and beams
• The casted members are vibrated to remove
air pockets . Vibration is done so that there is
no segregation of steel fibres.

18. results

19. conclusion

20. reference