This study explores the behavior of concrete made with Portland pozzolana cement (PPC) under elevated temperature conditions. This research focuses on M20 and M30 grade concrete and examines changes in compressive strength and split tensile strength at temperatures of 150 °C and 200 °C compared with those at room temperature. The methodology involved the casting of 18 cubic and 18 cylindrical samples, out of which 9 cubic and 9 cylindrical samples were of M20 grade and the remaining samples were of M30 grade. The samples were cured for 28 days, after which half of the samples from both the grades were heated to 150 °C (ET1) and 200 °C (ET2) for 2 h before testing. The results revealed that, compared to room temperature, the tensile strength increased at 150 °C and 200 °C for both M20 and M30 grade concrete. The compressive strength increased significantly for both grades at elevated temperatures, with M30 showing greater percentage increases than M20. The study concludes that concrete’s strength properties are generally enhanced at these elevated temperatures compared to room temperature, though the specific changes vary between grades and test types. This research provides insights into the performance of PPC concrete under elevated temperature conditions, where fire resistance needs to be improved.