The concrete, which is an important building material, has a wide range of uses through its economic advantages and many other advantages. Economics, easy obtainable, long life, easy curing and workability are some of the advantages. Concrete is the most used material in past century through its advantages. There are some disadvantages besides the advantages of concrete. Nowadays some studies are being done to improve these disadvantages. Especially in recent years, durability, high strength, ductility, workability are the most important features to be tried to improve reinforced concrete properties. One of the concretes resulting from these studies is called Reactive Powder Concrete (RPC). RPC is a special type of concrete that achieves high strength values. In this study, a beam specimen designed with RPC and a beam specimen designed with normal strength concrete are compared. Designed beams were 500x250 mm cross-section in dimensions. These beams included 3ϕ12 tensile reinforcement and 2ϕ12 montage reinforcement. The C30 concrete grade was used for the design made with normal strength concrete. The S420 steel grade was used for both designs. The moment carrying capacities of the sections were calculated according to the bearing capacity principles. The effect of change of concrete grade on moment carrying capacity was examined by comparing the obtained results. Through this study, it is aimed to study the strengthening of the building elements by using the RPC in the next works by going out from the effects of the concrete class.