Comparative Investigation of Pervious Concrete Using Coir (Natural Coconut Fibre) and Nylon Fibre

Based on the comparative investigation of pervious concrete reinforced with coir (natural coconut fibre) and nylon fibre, the following conclusions are drawn: 1.                Both coir and nylon fibres improve the compressive and tensile strength of pervious concrete relative to the plain control mix when used at appropriate dosages. 2.                Optimum coir fibre content is approximately 1% by weight of cement, with reported compressive strength gains of up to about 65% and only moderate reduction in permeability. 3.                Optimum nylon fibre content lies near 0.2% by weight of concrete; nylon generally produces higher split tensile strength and more consistent results than natural fibres. 4.                At their respective optimum dosages, both fibre types keep infiltration rates within practical limits suitable for pervious pavement applications. 5.                Coir fibre is recommended where cost and sustainability are primary concerns; nylon fibre is preferred where higher tensile performance and uniformity are required. Future work should include long-term durability assessment (wet-dry and freeze-thaw cycling), hybrid coir–nylon systems, and full-scale field trials under traffic loading.

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