In this paper, the experimental results of eight circular RC column specimens tested under concentric and eccentric axial loads have been presented. The specimens were divided into four groups of two specimens. Specimens in the first group were the reference RC specimens without any strengthening, specimens in the second group were strengthened by wrapping with two layers of carbon fibre reinforced polymer (CFRP), specimens in the third group were jacketed with a thin layer of reactive powder concrete (RPC) and specimens in the fourth group were jacketed with a thin layer of RPC and wrapped with one layer of CFRP. From the two specimens in each group, one specimen was tested under concentric axial load and the other specimen was tested under 25 mm eccentric axial load. The eccentricity was found to be more effective on the ultimate axial load of the specimens wrapped with FRP than on the specimens jacketed with RPC. Also, the specimens jacketed with RPC then wrapped with FRP achieved the highest ultimate axial loads, which were 240% and 305% higher than the ultimate axial loads of the reference specimens under the concentric and eccentric axial loads, respectively.