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The rising cost of construction material is a matter of concern. The reason for increase in cost is high demand of concrete and scarcity of raw material. Hence the concrete technologists are researching on alternative materials in the construction world. In this study, M25 grade of concrete was produced by adding coconut fibre (coir). Forty five cylinders were casted and their split tensile strength and workability’s were evaluated at 7and 28 days. The workability and tensile strength of concrete increased to some extent as the coir increased. Concrete produced by 2%, 2.5%, & 3% addition attained 28 days tensile strength. These results showed that Coir Fiber Concrete can be used in reinforced concrete construction. Its utilization is ec o-friendly.