EXPERIMENTAL INVESTIGATIONS ON COMPRESSION BEHAVIOR PARAMETERS OF NSC AND SCC INTERMEDIATE RC COLUMNS

A total of six intermediate columns with same cross sectional area of 125mm X 125mm were cast and tested. Experimental study was conducted to know the behavior of intermediate columns under axial load made out of Normal strength concrete (NSC) and Self-compacting concrete (SCC). Main objective of this study was to compare the behavior of NSC intermediate columns and SCC intermediate columns for various percentage of steel. Axial load ratio, stiffness ratio were the main parameters which increased as the axial load increased. However in this study, special attention was given on stiffness degradation, energy absorption, ultimate load carrying capacity, shortening index of each intermediate column. The results showed that shortening index, axial load ratio, stiffness ratio and stiffness degradation increased with increase in axial load. On the other hand as the percentage of steel increased the ultimate load carrying capacity increased while shortening index and stiffness degradation decreased. SCC had ultimate load carrying capacity and ultimate deflection more than NSC for same percentage of steel.