This experimental program presents the behavior of self-confinement in circular reinforced concrete columns subjected to axial load at a loading rate of 1 kN/sec. This work consists of eight columns in two groups according to the main reinforcement pattern with two control specimens. Parameter in this experimental study are the amount of conventional longitudinal reinforcement and the rectangular steel sections used as a substitute for conventional reinforcement, without the inclusion of stirrups with a transverse curved crown 10 mm for all specimens. The results showed that increasing the amount of longitudinal reinforcement and using the alignment technique led to an improvement in the ductility of the columns and an increase in the effective stress, as well as an increase in initial stiffness and stored energy. Moreover, a slight increase in the ultimate strength of the columns was observed. In addition, the use of rectangular steel sections improved strength capacity by 5.16%, effective stress by 96.5%, ductility by 29.7%, initial stiffness by 50.2%, and stored energy by 13.25%. The use of rectangular sections with the same cross-sectional area as the main rebar, instead of the main rebar, resulted in significant enhancements in the compressive behavior of confined columns. The application of new confinement technique successfully eliminates buckling in longitudinal reinforcement steel.