Development of Laboratory-made Compositions of Concrete Based on the Certain Raw Materials and Restrictions of the AKKUYU NPP Construction

Introduction. Concrete is one of the materials most frequently used in construction thus the technologies of its manufacturing are being constantly improved. In our article we will develop the laboratory-made compositions of concrete based on the certain raw materials resources and restrictions existing at the construction site of one of the nuclear power plants in the Republic of Türkiye. One of the results of elaborating the concrete composition design technology is the selfcompacting concrete that fosters sustainable construction due to significant reduction of energy consumption. Self–compacting concrete is a type of concrete that can completely fill in the formwork only by gravity, without need for concrete consolidating by vibration. Its high fluidity and filling capacity are its advantages over conventional concrete. Self-compacting concrete has high fluidity, high water retention capacity, good strength. The aim of the study was to obtain the laboratory-made compositions of concrete based on the certain raw materials resources and restrictions existing at the construction site.Materials and methods. The list of raw materials potentially meeting the design documentation requirements has been specified. The concrete compositions using various aggregates were selected, the minimum amount of cement was determined, aimed among other things at corrosion resistance improvement.Results. Based on the restrictions existing at the construction site and according to the results of raw materials analysis including their oxide composition specification, 5 compositions were developed for each of NPP engineering structures.Discussion and conclusions. The study has completed all the tasks set forth, the main of which are: analysis of the raw materials market, laboratory studies of raw materials, specification of their actual physical and mechanical properties, identification of components meeting the standards and requirements, obtaining the laboratory-made compositions of concrete mixtures classified by their designation. The perspectives for further research are indicated.