Reactive Powder concrete has become one of the most important types of concrete due to its perfect features in terms of strength and durability, in addition to its small sections compared to regular concrete, which provides enormous possibilities for multiple applications. In this study, the mechanical properties of multiple mixtures of this concrete were tested. They included many variables, namely three types of pozzolanic materials and two types of reinforcing fibers, in addition to three different percentages of fiber content. Also, high-quality plasticizers were used to obtain low percentages of water. The results were varied and can be summed up by the fact that some variables, such as the difference in fiber percentages, had a small effect on the examined properties, such as compressive strength, density test, and absorption test. The effect of other variables, such as the type of fibers and the type of pozzolanic materials, had a greater impact on the mechanical properties of these mixtures.