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To investigate the potential use of Bentonite to evaluate its impact on various strength of ordinary Portland Concrete (OPC). It was accomplished to raise cement concrete by partially replaced of cement. An OPC batch, properly mix designed was prime; aiming at strength admixtures was also introduced to attain high workability. Normal compressive testing was performed for this purpose and the quality of concrete was checked. It was seen from the results that Bentonite resulted in poor early stage and good later stage Compressive strength when compared with Conventional samples. The bentonite samples were characterized by the main variable proportion of bentonite in the natural and intercalated forms (0, 25, 30, and 35% by weight of cement for a mix of M25) in the replacement mode whiles the amount of cementations material. At 30% substitute of clay has achieved 19.55%, 2.72% and 8.07% in compressive, split tensile and flexural strength for 28days.