This paper presents an experimental investigation for the mechanical behavior of confined concrete specimens made with different types
of coarse aggregates and subjected to concentric loads. The response of the specimens varies with the variation in the properties of the
aggregates. The effect of different levels of transverse reinforcement ratio on the behavior of the studied types of concrete is investigated and
the results are analyzed and presented in the study. The study included forty-eight cylindrical specimens of 100 mm diameter and 650 mm
height. The results of the study show considerable effect for the type of the used aggregate on the mechanical behavior of the specimens. The
effect of changing the spacing of the stirrups and the configuration of the stirrup closure are also investigated and analyzed in the paper.