Mechanical analyzes were carried out on the recycled concrete samples obtained by preparing different mixtures of geopolymer powder, metakaolin, aggregates and alkali activator as sodium silicate (Na2SO3) and sodium hydroxide (NaOH) solution, which were formed by grinding the geopolymer concrete samples prepared with certain temperature and low curing times. In order to determine the contribution of metakaolin and ground geopolymer powders to the mechanical properties of geopolymer concrete, three different mixtures were prepared. In the three mixtures, ground geopolymer powder of 33.8%, 29.6% and 25.4% by volume, respectively, was used. In addition, metakaolin was used in the three mixtures at a rate of 0%, 4.2% and 8.4% by volume, respectively. The mixtures formed were kept in a curing environment at 45 and 75 ℃ for 8 hour, and mechanical properties (flexural and compressive strength), capillary water absorption and dry unit weights were determined by performing some experiments. The test results showed that the highest compressive strength of the mixture in the curingenvironment at 75 degrees was 46.3 MPa. The test results showed that the lowest capillary water absorption (0.7 kg/m2) was in the mixtures with the highest metakaolin content. In addition, it was shown that the highest dry unit weight (2354 kg/m3) was obtained in the mixture with the highest metakaolin content kept at 45 ℃. At the end of the study, it has been suggested that recycled geopolymer powders and metakaolin can be used together to make high strength concrete without consuming too much natural resources and energy.