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Abstract

The aim of this study was to investigate the potential of tire derived rubber aggregates, particularly powdered rubber, and recycled steel wire fiber for use in concrete subjected to impact loading for GDOT applications. The first study phase involved small-scale batching of preliminary mixtures to investigate the fresh and hardened properties of concrete mixtures with varying concentrations of rubber products and steel fiber. Based on fresh properties, as well as compressive strength, modulus of rigidity, and impact resilience, mixtures were selected for Phase II testing. Phase II investigated static and impact testing of scaled beams for two mixtures, a powdered rubber mixture and a combination mixture incorporating rubber products and recycled steel fiber. For both the static and impact beams, the recycled steel fibers in the combination beam demonstrated improved capacity and load distribution, acting as a sufficient replacement for industrial steel fiber.

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