One of the materials used to build structures is concrete. Concrete is also one to the up-to-date topical which researchers are using innovative ways to remove its negative aspects and Improve its capabilities.Thus in the last few decades new types of concrete has been produced and Improved. One type of concrete first Known world wide in 90’s is RPC. This is generally achieved by a micro-structural engineering approach, including elimination of the coarse aggregates in order to increase the homogeneity of the material, increased compactness through optimization of the grading, reducing the water-to-cementitious material ratio, lowering the CaO–SiO2 ratio by introducing silica components, improvement of the microstructure by pressure-casting with heat treatment curing and further addition of steel ?bers to improve ductility. Original reactive powder concrete – in the form of a superplasticized cement mixture with silica fume, steel ?bers and ground ?ne quartz. Nowadays, RPC is regarded as a promising material for special prestressed and precast concrete members including those within industrial and nuclear waste storage facilities. RPC has a very high compressive strength. To create this type of concrete researchers use different mix designs, since no code non a proper mix design is available. Most of the collected strengths which their mix design was available were collected using steel fibers which were in the range of 200 MPa. After reviewing many papers, a certain mix design leading to compressive strength of RPC without steel fiber exceeding 200 MPa has not been found. One of the proper pozzolanic materials Introduced these days is Nano-SiO2. Nano-SiO2 had not been used in RPC yet. Thus some Nano-SiO2 was added to RPC. The only aim was to increase the compressive strength of RPC.The main aim in the presented paper is reaching to proper mix design for a RPC which can gain at least 200 MPa compressive strength without using steel fibers and concrete paste compaction. Effect of amount of Materials, different curing ways and addition of Nano-SiO2 on the compressive strength of RPC has been analyzed. In the presented research different steps were used so that in each step a certain parameter is analyzed and Improved. In each step limited number of mix design is Introduced and amount and proper ratio of materials is gained. Then in the next steps new mix designs are Introduced acknowledging the previous results gained from previous steps.In the presented paper a base mixture desing whit 28 days standard compressive strength equal to 85 MPa is used, Whit change in mix design and the way of curing it, RPC with compressive strength of 233 MPa was produced. Curing leding to this strength was autoclave along with temperature of 220 0C heating operation. An approximately 1100 kg/m3 cement was used to produce this concrete. In the end effect of replacing silica fume with Nano-SiO2 on the compressive strength of RPC has been analyzed. Addition of nano-SiO2 did not have a positive effect on the RPC compressive strength and lead to reduction of RPC strength. Keywords: Reactive Powder Concrete, RPC, compressive strength, Nano-SiO2, steel fiber, 200 MPa, autoclave