Waste tires steel fiber in concrete: a review

The emergence of waste tire steel fiber (WTSF) which is an undervalued resource was borne out of the need to extract the useful materials in waste tires considering the sheer volume of this resource that is disposed of in landfills globally. These fibers find applications in tunnel linings, hydraulic structures, bridge decks, pavements and slope stabilization. The fiber length has positive influence on compressive strength (increased by more than 10%), flexural strength (increased by more than 50%) and split-tensile strength(increased by more than 30%) while slump and flow (increased by more than 80%) were reduced but can be avoided through careful mixing, reduction of coarse aggregates and utilization of short fibers. Utilization of WTSF contributes to the sustainability of the construction industry. This paper focuses on reviewing the contemporary management of waste tires, fresh and hardened properties of steel fibers extracted from the waste tires, usage of the steel fibers and the durability of concrete containing these fibers.