Behaviour of High Strength Rubberized Concrete under Compression Loading

Abstract

vi ABSTRACT The process of rubber decomposition is extremely slow and time consuming, the disposal of wasted tire causes environmental issue and very dangerous for public health. The addition of wasted rubber to make green concrete is beneficial to the environment. The aim of this research is to check stress strain behavior of eco-friendly high strength rubberized concrete pre-treated with waste quarry dust (WQD), which itself is a waste material. Nine different mixes were made in which one mix contained no replacement of sand whereas four mixes were made by substituting (5%, 10%, 15%, and 20%) of sand by volume with non-treated rubber, the remaining four contained treated rubber with WQD. The stress strain curve examined completely which includes compressive strength, modulus of elasticity, ductility, energy absorption capacities, toughness index and failure mode of concrete specimens. Moreover, tensile strength of all samples was investigated. The treated samples show improvement in compressive strength, tensile strength, and modulus of elasticity with increasing percentage of the rubber content. Whereas ductility and toughness index were improved in non-treated sample compared with treated specimens. It was observed that treated rubber exhibited slightly less improvement in post peak behavior than non- treated rubber. The outcome of this novel approach of rubber treatment provides an overview about the effect of rubber treatment on the stress strain behavior of high strength rubberized concrete.