Workability and Strength Properties of Hybrid Fiber Reinforced Concrete from Industrial Waste

This paper investigates the workability and mechanical strength properties of the high strength concrete reinforced with two different industrial waste fibres. Locally available steel lathe waste and nylon waste were used at different volume fractions as fibre cocktails in concrete. Steel lathe wastes were used in as received lengths and nylon fibres were chopped in to 40 mm lengths. In total, 12 hybrid mixes were cast and tested at four different volume fractions i.e., 0.5%, 1.0%, 1.5% and 2.0%. The experimental programme used the slump test and the air content test on the fresh concrete. The hardened concrete was tested for its compressive strength, split tensile strength and modulus of rupture. All the mechanical properties of the different mixes were enhanced due to the hybrid nature of the fibre cocktails. Out of all the mixes, the hybrid mix at 2% volume fraction with a combination of steel ½ + nylon ½ gives the best performance.