Effect of different types of fibers on workability and compressive strength of self compacting concrete

Fiber Reinforced Concrete is a type of concrete that includes composite material consisting of mixtures of cement, sand and aggregates with discontinuous, uniformly dispersed fibers. It contains short natural fibres that are randomly oriented and uniformly distributed. The objective of this research work is mix design of self-compacting concrete with various percentages of fibers and to study the optimum fiber content on workability and compressive strength of concrete. A concrete mix was designed to achieve the M25 grade concrete as per IS 10262. The investigation has been done by taking 3%, 5%, and 7 % (by the weight of cement) of coconut fiber and 0.5%, 1% and 2% of glass fiber in the concrete mix. The result shows that in the normal mix the optimum water cement ratio is 0.47. The optimum dosage of glass fiber content is 1% and coconut fiber content is 5%. If the fiber content increases beyond the optimum dosage, then the strength of the concrete decrease significantly.