Optimization of Steel Fiber Reinforced- Cold-Drawn Alloy Granules as a Concrete Admixture for Improving Structural Performance

Abstract

This study investigates the structural improvements obtained by introducing cold-drawn wire and steel fiber into concrete mixes, with an emphasis on their use in reinforced pavements.  This study analyzes how hybrid reinforcement can overcome the constraints of standard concrete in terms of fracture resistance, ductility, and durability. Three mix designs were formulated with varying gravel replacement levels with cold-drawn alloy granules (10%, 20%, 30%), and tested for compressive strength, and flexural strength over 7-, 14-, and 28- days curing periods. Results show that a 10% CDAG substitution (M1) achieved the highest compressive strength of 17.3 MPa at 28 days, while a 20% substitution (M3) yielded the best flexural strength at 5.54 MPa. The findings suggest that a 10% replacement is optimal for compressive strength, whereas 20% benefits flexural performance. Overall, CDAG shows potential as a sustainable partial binder alternative in concrete.