IntroductionConcrete is widely used constructional material with its high compressive strength. But it has some flaws like shrinkage and cracking, low tensile and flexural strength, poor toughness, high brittleness, low shock resistance etc. To overcome these deficiencies, additional materials are added to improve the performance of concrete. Use of fibres has been developed in recent years. It has been successfully used in construction with its excellent flexural-tensile strength, resistance to splitting, impact resistance, excellent permeability, and frost resistance. It is an effective way to increase toughness, shock resistance, and resistance to plastic shrinkage cracking of the mortar. Cracks in concrete occur due to the nature of the material. Cracks can be of two types, structural and non structural. Non structural cracks are neither harmful to a structure nor to its serviceability. Cracks up to width of 0.3mm are tolerable . But more than 0.3mm width or structural cracks can be harmful for the structure. These cracks can be reduced by adding fibres to concrete.
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