Fiber reinforced concrete and behaviour properties and applications and advantages

Definition of fiber reinforced concrete:

Fiber-reinforced concrete is concrete containing fibrous material which increases its structural integrity.

The use of high strength fiber-reinforced polymer (FRP) materials has grained acceptance as structural reinforcement for concrete.

Fiber:

An overview on fiber:

In recent years, several studies have been conducted to investigate the flexural

strengthening of reinforced concrete (RC) members with fibre reinforced composite

fabrics. Recently, the use of high strength fibre-reinforced polymer (FRP) materials

has grained acceptance as structural reinforcement for concrete.

In this composite material, short discrete fibres are randomly distributed throughout the concrete mass. The behavioural efficiency of this composite material is far superior to that of plain concrete and many other construction materials of same cost. Due to this benefit, the use of FRC has steadily increased during last two decades and its current field of application includes airport and highway pavements, earthquake resistant and explosive resistant structures, mines and tunnel linings, bridge deck overlays, hydraulic structures, rock slope stabilization. Extensive research work on FRC has established that the addition of various types of fibres such as steel, glass, synthetic and carbon, in plain concrete improves strength, toughness, ductility, and post cracking resistance etc. the major advantages of fibre reinforced concrete are resistance to micro cracking, impact resistance, resistance to fatigue, reduced permeability, improved strength in shear, tension, flexure and compression. The character and performance of FRC changes with varying concrete binder formulation as well as the fibre material type, fibre geometry, fibre distribution, orientation and fibre concentration.

 FIBRE MATERIALS:

According to terminology adopted by the American Concrete Institute

(ACI) committee 544, Fibre Reinforced Concrete, there are four categories of FRC

based on fibre materials type. These are Steel Fibre Reinforced Concrete, Glass Fibre

Reinforced concrete, Synthetic Fibre Reinforced Concrete, including carbon fibres and

Natural Fibre Reinforced Concrete.

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