STEEL FIBER REINFORCED CONCRETE

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•         Steel fiber reinforced concrete (SFRC) may be defined as a composite materials made with Portland cement, aggregate, and incorporating discrete discontinuous steel fibers. Incorporation of steel fiber in concrete has found to improve several properties like tensile strength, cracking resistance, impact and wear resistance, ductility and fatigue resistance. Steel Fibers are usually used in concrete to control cracking due to both plastic shrinkage and 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. If the modulus of elasticity of the fiber is higher than the matrix (concrete or mortar binder), they help to carry the load by increasing the tensile strength of the material. However, fibers which are too long tend to "ball" in the mix and create workability problem.

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