BEHAVIOR AND STRENGTH PROPERTIES OF STEEL FIBER REINFORCED SELF-COMPACTING CONCRETE COLUMNS

The presence of steel fiber in self-compacting concrete mix offers many advantages to the structural elements that cast by this type of mix. Steel fiber acts inside the concrete structural elements like a bridges that delays the cracks propagations and enhances the concrete mechanical properties. Concrete containing steel fiber influences on the workability of concrete so that self-compacting concrete improves the workability of concrete. In the present study, conduct of the steel fiber reinforced self-compacting concrete columns subjected to static loading was investigated. The self-compacting concrete as limestone powder was adapted with steel fiber such as 1, 1.5 and 2%. Concrete mechanical properties such as compressive strength, splitting tensile strength and modulus of rupture were investigated. Four stub columns were tested under axial load. The test results show that there was an increase in concrete mechanical properties and load capacity of short column in presence of self-compacting concrete and steel fibers. The amount improvement resulting from use of steel fibers in a concrete (SCC) on the mechanical properties of concrete (compressive, tensile and flexural strength) based on the best steel fiber percentage (2%) is 40.00, 16.67, and 14.29% respectively and the amount of improvement in the behaviour of SFSCC columns as loading is 25.93%. the enhancements in lateral and longitudinal displacements is 20 and 24% respectively.