The construction of light concrete is done in a variety of ways, including the replacement of light materials in place of ordinary materials. Although the relatively high weight of concrete structures in structures such as dams, foundations, retaining walls, and such like, it is an advantage, but in some other structural applications such as high-rise buildings, long-span bridges and prefabricated prefabricated materials Increases load on structures and creates problems. These problems are doubly felt especially in countries such as Iran, which are located in earthquake areas, and given that the earthquake loads increase with increasing structural mass. In this project, instead of using pozzolan in cement, it is tried to use pumice from Esfandan region from the city of Osko and in 5 different mixing designs with different materials proportions are determined and presented after mixing and molding, experiments The compressive strength was carried out on samples of 5 * 5 * 5 cubic cubic meters, and in the next stage, the resistances of 7 and 28 days were determined and the mixing design with the highest compressive strength was determined.