Ductility performance of reinforced rubberised concrete beams incorporating burnt clay powder

David Sinkhonde; Richard Ocharo Onchiri; Walter Odhiambo Oyawa; John Nyiro Mwero

doi:10.1016/j.heliyon.2021.e08310

Ductility performance of reinforced rubberised concrete beams incorporating burnt clay powder

Heliyon. 2021 Nov 2;7(11):e08310. doi: 10.1016/j.heliyon.2021.e08310. eCollection 2021 Nov.

Authors

David Sinkhonde¹, Richard Ocharo Onchiri², Walter Odhiambo Oyawa³, John Nyiro Mwero⁴

Affiliations

¹ Department of Civil and Construction Engineering, Pan African University Institute for Basic Sciences, Technology and Innovation, Nairobi, Kenya.
² Department of Building and Civil Engineering, Technical University of Mombasa, Mombasa, Kenya.
³ Department of Civil, Construction and Environmental Engineering, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
⁴ Department of Civil and Construction Engineering, University of Nairobi, Nairobi, Kenya.

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.

Keywords: Burnt clay brick powder; Ductility; Flexure; Rubberised concrete; Seismic application; Shear.