FIBRE-REINFORCED CONCRETE (FRC)

Plain concrete possesses deficiencies such as restricted ductility, low tensile strength, and low resistance to cracking. Before loading the cracks develop even. Micro cracks widen and propagate, exposing concrete to atmospheric actions after loading. While mixing concrete, if closely spaced and uniformly dispersed fibres are provided cracks are arrested and static and dynamic properties are improved. With discontinuous and uniformly distributed fibres Fibre reinforced concrete may be described as a composite material of concrete or mortar. Commonly used fibres are of, nylon, steel, coir, asbestos glass, carbon and polypropylene. Length to lateral dimension of fibres is range from 30 to 150. Diameter of fibres varies from 0.25 to 0.75 mm.

Fibre reinforced concrete has better ductility, tensile strength, and resistance to cracking.

Uses of FRC

1. FRC is used for wearing coat of refractory linings, roads and air fields.

2. FRC is used for manufacturing precast products like pipes, wall panels, manhole covers and boats.

3. FRC is used in Glass fibre reinforced concrete which is used for manufacturing doors, park benches, bus shelters etc.

4. FRC is used in Carbon FRC which is suitable for structures like cladding and shells.

5. FRC is used in Asbestos FRC sheets which are normally used as roofing materials.