Fiber reinforced concrete is concrete containing fibrous material which increases its structural integrity. Fiber reinforced cements and concretes are firmly established as construction materials.
Since the early 1960’s extensive research and developments have been carried out with FRC materials leading to a wide range of practical applications. In recent years, a great deal has been leaned regarding the limitations of some FRC materials and, particular, the importance of good design. The universities and the construction industry world-wide are blessed with experts in all facets of FRC theory and applications. Is there anybody bold enough to ask the experts, individually or or collectively
Fibers include steel fibers, glass fibers, synthetic fibers and natural fibers. Within these different fibers that character of fiber reinforced concrete changes with varying concretes, fiber materials, geometries, distribution, orientation and densities.
It has very good compressive strength but comparatively little tensile strength, which makes it likely to crack under many conditions. Cracking leads to further damage. Fiber reinforced concrete is less likely to crack than standard concrete.
Advantages of Fiber reinforced concrete
High longitudinal strength
improve freeze-thaw resistance
High fatigue endurance (varies with type of reinforcing fiber and bar)
Low thermal and electric conductivity
Limitations of Fiber reinforced concrete
Low modules of elasticity
Low share strength
Reduce durability in moist, acid/salt, and alkaline environments
Low transverse strength
High coefficient of thermal expansion perpendicular to the fibers relative to concrete
Fire resistance can be less than adequate, depending on the type of matrix used for producing frp bars