Rich mineral silica (Ecosand) being waste material generated from manufacture of cement from industry. It can be used to increases efficiency in concrete. An experimental study has been done to achieve high strength concrete using Rich mineral silica (Ecosand) from manufacture of cement as the partial replacement of natural sand (upto 50%) in concrete and then to studied its mechanical properties .Experimental are also shows that the compressive strength, flexural strength, splitting tensile strength and structural behaviour of beam of rich mineral silica(Ecosand) and natural sand such that the combination of two aggregate can be increased efficiency in concrete. The grading of aggregate of tested results shows closest to zone II or zone III.