Fly ash, which is a by-product and waste of thermal power plants, poses an environmental problem. This waste material, fly ash, has a negative impact on the natural environment and global warming. Fly ashes are compatible with cement-based building materials. In the last hundred years, scientific work on the publication of the use of fly ash has been accelerated. Fly ashes are known to have negative effects on early-day strength. In order to minimize the negative effects of this first day, the cement in the mixture was reduced by 50% and replaced with fly ash. Nano silicate or nano iron oxide is added to the fly ash mixture at the rates of 0%, 0,5% 1.0%, 1,5% and 2,0% of the cement weight. It is aimed to determine the optimum ratio of nano materials in the mixture depending on their strength in the first days. 50x50x50 mm cube samples were produced from these mixtures and their 1st, 3rd and 7th day compressive strengths were determined. According to the results obtained, the highest strengths of the samples produced with 1% nano silicate were 28,92 MPa, 40,66 MPa and 50,43 MPa, respectively, while the samples produced with 0.5% nano iron oxide were 27,63 MPa, 40,17 MPa and 48,20 MPa. According to the results of this study, the optimum ratio of 1% nano silicate and 0.5% nano iron oxide was determined.