The aim of this study is to investigate the effect of various kenaf fibre (KF) ratio as an additive: banana fibre (BF) reinforced concrete compared to normal concrete (NC) on the mechanical properties of the reinforced concrete. Thus, this paper will discuss the effect of fibres as the additives to reinforced concrete mixed. The properties included compressive strength and splitting tensile strength. The different ratio of KF1.4%: BF1.5%, KF1.6%: BF1.5% and KF1.8%: BF1.5% were used in this study. The results show that the strength was increased with the increasing of fibre additives, but they were not stiff compared to the normal concrete. While the splitting tensile strength increased when the content of fibre increased. The test data indicates that the addition of fibre will increase the mechanical properties of the concrete.
