High temperature on concrete members affects serviceability and rehabilitation of buildings and other reinforced concrete structures. Therefore, to assess the performance of reinforced concrete members it is important to understand the changes in the concrete properties due to extreme temperature exposure. This study examined the effect of elevated temperatures on the compressive and tensile strength of concrete made with scoria-marble powder as a partial replacement of cement. In this paper; temperature intensity, temperature duration, percentage of scoria-marble replacement and curing age of concrete considered as variable parameters with constant concrete grade(C20/25). Samples from five different concrete mixes with scoria-marble percentage of 0%, 5%, 10%, 15% and 20% were prepared. Temperature intensities of 300°C 600oC and 900°C used for exposure durations of 1, 4 and 8 hours. During experimental test 150 concrete cylinders and 315 concrete cubes were casted and tested. Compressive strength and split tensile strength for each replacement percentage, temperature intensity and temperature duration were determined. In addition, changes to physical properties of concrete including mass loss, color change, spalling, and cracking have been examined. Test results indicated that the compressive strength of scoria marble (SM) partially replaced cement concrete at 300°C is comparable to room temperature value. The results also revealed that 5% and 10% SM replaced concrete retained higher compressive strength relative to concrete with out SM replacement (control level), this implies optimum value of SM replacement of cement at elevated temperature is 10%. Key words :- Concrete, Elevated temperature, Scoria, Marble , compressive strength