Abstract
Abstract The article deals with the environmental pollution from ash waste, the analysis of radioactivity and thermal decomposition of fly ash at thermal power plants used in the production of light concrete. It shows the research and analysis of fly ash of thermal power plants in Ekibastuz, Republic of Kazakhstan. In these studies, more attention is paid to the comparison of the radioactivity analysis of fly ash of a thermal power plant, for compliance with international standards and requirements for use in light concretes. There is the study of the thermal decomposition of fly ash. the process of thermal decomposition of fly ash of Ekibastuz TPP, The objective of the research is to determine radioactivity and thermal decomposition of fly ash at Ekibastuz TPP and establish the possibility of its potential use in the production of light concrete. Tthe process of decomposition of ash structure began at the temperature of 1100 ° C, with heat absorption effects (endothermic) at 240-380° C and heat release effect (exothermic) at 680° C, and a corresponding change in ash mass loss temperature of 1.2%.