Fiber-reinforced concrete (FRC) incorporates fibrous materials to enhance structural integrity, control cracking, and improve resistance to various stresses. The composition of FRC, including fibers like steel and glass, influences properties such as tensile strength and workability, while offering advantages like reduced reliance on steel reinforcement and improved durability. Applications of FRC can be seen in various infrastructure projects worldwide, demonstrating its effectiveness in reducing self-weight and maintenance costs.

1. FIBRE REINFORCED
CONCRETE
BY-
RAJAT NAINWAL

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

3. EFFECT OF FIBERS IN CONCRETE
- Fibers are usually used in concrete to control cracking due to plastic shrinkage and to
drying shrinkage.
- They also reduce the permeability of concrete and thus reduce bleeding of water.
- Some types of fibers produce greater impact–, abrasion–, and shatter–resistance in
concrete. Generally fibers do not increase the flexural strength of concrete, and so
cannot replace moment–resisting or structural steel reinforcement.
-The amount of fibers added to a concrete mix is expressed as a percentage of the total
volume of the composite (concrete and fibers), termed "volume fraction" (Vf). Vf typically
ranges from 0.1 to 3%. The aspect ratio (l/d) is calculated by dividing fiber length (l) by its
diameter (d).
- Fibers with a non-circular cross section use an equivalent diameter for the calculation of
aspect ratio. If the fiber's modulus of elasticity is higher than the matrix, they help to carry
the load by increasing the tensile strength of the material. Increasing the aspect ratio of
the fiber usually segments the flexural strength and toughness of the matrix. However,
fibers that are too long tend to "ball" in the mix and create workability problems.

4. FRC COMPOSITION
230 kg/m3
710 kg/m3
210 kg/m3
40 - 160 kg/m3
13 kg/m3
140 kg/m3
1020 kg/m3
Cement
Silica Fume
Crushed
Quartz
Sand
Fibres
Plasticiser
Total Water
- No coarse aggregate

5. ADVANTAGES
• Very high compressive and tensile strength.
• High elasticity modulus and durability.
• Improve structural strength.
• Reduce steel reinforcement requirement.
• Reduce crack widths and control the crack widths tightly, thus improving durability.
• Improve impact– and abrasion–resistance.
• Improve resistance to explosive spalling in case of a severe fire.
• Increase resistance to plastic shrinkage during curing.

6. • Sherbrooke footbridge, 1997
• Seonyu footbridge, Korea, 2001-2002
• Papatoetoe Railway Station, New Zealand, 2005
• Cattenom Power Station beams, 1997-98
• Shepherds Gully Creek Bridge, Australia, 2003-2004
• Chabotte Bridge, France
• Millau Viaduct Toll Gate, France
• Shawnessy Light Rail Train Station, Canada
•The Folly, Netherlands
• Martel tree, 1998
• Monaco station panels, 1999
REFERENCES OF FRC

7. SHERBROOKE FOOTBRIDGE, CANADA

8. 3000
3300
150
320
380
3000 mm
3 cm thick slab with ribs
FRC confined in stainless steel pipes
60 .0m4x7T13
2x4T132x4T13 2X7T13 2x4T13
3.0m
60m span prestressed structure without passive reinforcement
SHERBROOKE FOOTBRIDGE, CANADA

9. SEONYU FOOTBRIDGE, KOREA

10. PAPATOETOE RAILWAY STATION, NEW ZEALAND

11. • Use of FRC allows reduction
of the structure self weight by a
factor of 3
• Durability properties of Ductal
allow reduction of maintenance
costs
CATTENOM POWER STATION BEAMS, FRANCE

12. 15100
Elevation
Precast pretensioned
FRC beams
Reinforced concrete slab
Driven steel piles Precast concrete walls
SHEPHERDS GULLY CREEK BRIDGE, AUSTRALIA

13. SHEPHERDS GULLY CREEK BRIDGE, AUSTRALIA

14. CHABOTTE BRIDGE, FRANCE

15. (Portée entre appuis : 47m40)
CHABOTTE BRIDGE, FRANCE

16. MILLAU VIADUCT TOLL GATE, FRANCE

17. MILLAU VIADUCT TOLL GATE, FRANCE

18. 24 FRC white, ultra-thin (only 20 mm)
curved shell-shaped canopies
SHAWNESSY LIGHT RAIL TRAIN STATION, CANADA

19. THE FOLLY, NETHERLANDS
MARTEL TREE, FRANCE

20. MONACO RAILWAY STATION PANELS

21. THANK YOU