Performance of waste crumb rubber steel fiber concrete under dynamic loadings

Abstract

Production of sustainable concrete is the most crucial factor to be considered in construction fields. The utilization of waste treated crumb rubber and steel fiber can mitigate the problematic issues of Normal Concrete (NC) which is brittle, low tensile, and low damping performance. The purpose of this research is to characterize the properties of treated crumb rubber and steel fiber from waste tires, to determine the formulation of Treated Crumb Rubber Steel Fiber Concrete (TCRSFC), to investigate the mechanical properties of NC and TCRSFC, and to evaluate the damping ratio and study the response of NC and TCRSFC column subjected to dynamic loading (seismic ground motion). In this research, the percentage of treated crumb rubber as a fine aggregates substitution varied from 10%, 20%, and 25% while 0.5% and 1% of steel fiber as additional material. The tests consist of compressive strength, flexural strength, splitting tensile strength, modulus of elasticity, microstructure, free vibration, and seismic testing. Based on analysis, dynamic modulus and damping ratio of TCRSFC has improved considerably by 5.18% and 109% when compared with NC respectively. Overall, this research demonstrated the potential use of treated crumb rubber and steel fiber as sustainable concrete that can enhance the damping performance of concrete structure, which is suitable for seismic resistance structure under dynamic loadings.