Alternatives to cement are widely used in concrete technology. Despite the fact that many researchers have looked at the characteristics of concrete after adding mineral admixtures. A “binary blended cementitious system” with RM and SM modified from 0–20 percent by an increment of 5% produced twelve alternative mix proportions. This study compares the binary cementitious systems of mechanical properties (compressive, flexural and split tensile strength) in order to determine the optimum percentage of materials, such as red mud (RM) and silica fume (SF) with manufactured sand (M-Sand) at the ages of 7, 14 and 28 days. The designated test result will include any mineral admixtures, which will generally have an impact on the mechanical characteristics of all the tested specimens. The combined use of red mud and “silica fume” concrete mix slightly improves the mechanical properties compared to the alternative studies, although red mud is less effective than silica fume. The use of additional cementitious materials with mineral admixtures increased strength increases up to 10% replacement of RM and SF, it is concluded. When compared to the findings of the experiments, the proposed regression equations produce relatively minor errors; as a result, they are capable of producing predictions of the flexural, split and compressive strengths that are accurate and efficient. © 2024 Elsevier B.V., All rights reserved.