Abstract
Application of rubberised concrete in earthquake prone areas is of significant importance. Although investigations have been conducted to research on the ductility of rubberised concrete, the behaviour of rubberised concrete with Burnt Clay Brick Powder (BCBP) is not well understood. This paper captures the ductility behaviour of rubberised concrete containing BCBP. In this study, 3 beams were investigated in flexure while the other 3 beams were made to fail in shear and flexure. For the beams that failed in flexure, ductility of concrete beams containing 5% BCBP and 10% Waste Tire Rubber (WTR) improved by 23.47% compared to control beam. This increase in ductility was evidenced with only 15.31% reduction in flexural load. Moreover, the beam containing 5% BCBP and 10% WTR failing in shear and flexure exhibited 14.59% ductility improvement with 16.33% load reduction in comparison to the control beam. Eventually, the study concluded that it is possible to achieve improved ductility without substantial loss in ultimate failure load by using 5% BCBP and 10% WTR. Such properties demonstrated that this rubberised concrete with 5% BCBP can be used in seismic applications.
Highlights
Majority of used tires are damped and stockpiled in landfills
Several aspects relating to beam failures such as flexural, shear, ductility and cracking behaviour are discussed in two parts
For the beams that failed in flexure, the ductility of rubberised concrete beams containing 5% Burnt Clay Brick Powder (BCBP) and 10% Waste Tire Rubber (WTR) improved by 23.47% compared to control concrete
Summary
Majority of used tires are damped and stockpiled in landfills. For instance, nearly 1000 million tires conclude their life each year of which more than 50% are disposed without any treatment [1]. Waste Tire Rubber (WTR) is a main non-biodegradable waste which is hazardous to the surrounding [2, 3]. The inclusion of WTR substituting fine or coarse aggregates in concrete advances the ductility properties of concrete [6, 7, 8]. This property is desired for structural members since it accommodates distribution of stresses and offers warning about an anticipated failure [9]. Ductility property is significant in high rise buildings which are prone to earthquake failures. Structural engineers have a great role to play in responding to the consequences arising from earthquakes [10]
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