Different additional cementitious materials can be used to partially replace cement in concrete. these are used in concrete as a partial replacement for cement to reduce the effect of environmental pollution, which can lead to serious health issues. Therefore, it is critical to use locally available pozzolanic materials as a partially replacement for cement because these materials are less expensive than Portland cement and are more environmentally friendly without sacrificing concrete quality. Pozzolana made from basalt natural material was tested for the best amount of weight percentage replacement as a blinding component in cements in this study. Various percentage of basalt as a partial replacement weight percentage of ordinary Portland cement by 7.5%, 15%, and 22.5% is carried out. effect of basalt on workability, setting time, compressive strength, modulus of elasticity, tensile strength, flexural strength, and water absorption were conducted. The parameters were studied and monitored by tested a fresh and hardened concrete samples at ages of 7 days, 28 days, 56 days, and 90 days. Based on the test results, it is concluded that the optimal content of basalt as replacement of ordinary Portland cement in concrete mix is 15%.