Presence of an outer shell to concrete provides confining effect to infilled concrete, which enhances its structural behaviour. The aim of this study is to investigate the post-peak behaviour of concrete with outer confinement subjected to compressive force. Plain cement concrete (PCC) when used in columns shows sudden failure. This study aims to provide effective solution to avoid brittle failure in columns with PCC using suitable confinement to column. Nine samples of M40 grade were cast where three were unconfined of height 0.5 m and the other six were confined with 2 mm thick steel sheet of height 0.5and 0.7 m in sets of three. The dimensional parameters include the effect of confinement, slenderness ratio, post-peak fracture energy and ductility index and confinement factor for samples. Results concludes that the mode of confinement boosts the peak loading capacity to double its capacity compared to bare PCC samples. The confinement factor is directly proportional to the slenderness ratio. The outer shell changed the failure mode of PCC bare samples from brittle failure to ductile failure, where the specimens could take substantial axial load in post-peak stage till complete destruction. The specimens failed mainly by tearing of confining steel and crushing of in filled concrete. Large displacements of specimens will extend the time of the structure to collapse with proper indicative measures before complete failure.