Experimental Study On Mechanical And Dynamic Properties Of Concrete With Waste Tyre Rubber As Partial Replacement Of Coarse Aggregate
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Date
2021-07
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Addis Ababa University
Abstract
Concrete is one of the most popular construction materials, due to this reason production of
sustainable concrete and trying to increase its properties, uses and applications is the most
crucial factor to be considered in construction fields. The utilization of waste tyre rubber
can mitigate the problematic issues of normal concrete which are brittleness, cracks and
shrinkage, and low energy absorption. This research primarily focused on finding the best
way of producing concrete with highly energy dissipation capacity by use of waste tyre
rubber as a component material. On the other hand the management of waste tyre rubber is
a major ecological and environmental problem in the world. The use of waste tyre rubber
into the concrete can reduce this global problem. In this study, the performance of
shredded waste tyre rubber as partial replacement of coarse aggregates in C-25 grade of
concrete mix at different ratios and its effect on concrete properties like compressive
strength, flexural strength split tensile strength and dynamic properties were investigated.
The shredded waste tyre rubber was used to partially replace at ratios of 5%, 10% ,15% ,
20%, and 25% the volume of coarse aggregate in concrete mix.
Results from laboratory tests indicated that the replacement of waste tyre rubber in the
concrete as coarse aggregate showed the reduction on strength of concrete (compressive
strength, split tensile strength, flexural strength); workably and dry density of rubberized
concrete below the nominal concrete mixtures with the increasing of waste tyre rubber
ratio. On the other hand, replacing coarse aggregate with waste tyre rubber can improve
dynamic properties of concrete. It was observed that the damping ratio increased with an
increase in applied string and impact load as well as with an increase in waste tyre rubber
content in concrete mix.
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Keywords
waste tyre rubber, rubberized concrete, damping ratio, aggregate replacement, strength of concrete