The field of waste toner cartridges recycling and usage of waste toner powder (WTP) as raw material in accordance with postulates of circular economy is poorly investigated with small number of published scientific papers. Therefore, the aim of this doctoral thesis is to determine the posibility and justification of using WTP as a raw material in innovative concrete products in accordance with the requirements of the circular economy, thus closing the recycling process of waste toner cartridges. In the experiments up to 10% of fine aggregate (sand) in concrete was replaced with mixture of WTP and additive that remains from mechanical treatment of waste toner cartridges. Testing of the usability of the obtained concrete products was carried out at laboratory and industrial level. The success of the process is valorized through engineering and ecological analysis. Engineering analysis determined the impact on technical properties of concrete, while ecological analysis determined the ecological effects of aggregate replacement. As the most successful results from the technical and ecological aspect, are concrete with 1 and 3 and 5% of the aggregate replacement with mixture of WTP and additive. The leaching test confirmed the safety of the obtained concrete product for the environment, since the potentially dangerous components present in the WTP were successfully encapsulated. With life cycle analysis of product significant potential and justification for the use of WTP as secondary raw material in the concrete production industry was determined. Through this research a value-added products are obtained and waste is turned into raw material. At their end-of-life this products can be disposed off on landfill of inert or non-hazardous waste or find another use, such as a recycled aggregate in road construction.