There are over million ton of inorganic waste produced annually in Finland. In addition to wastes, different industrial inorganic residues/side streams are stored at industrial areas. The MIMEPRO project promotes the utilization and commercialization of unutilized but promising industrial inorganic waste and side streams. The main purpose of the project is to recycle or reuse materials instead of landfilling and dumping, and thus implementing the principle of a circular economy. MIMEPRO aims to reduce the environmental footprint and CO2 emissions of different industries, like construction, metal, energy, and pulp and paper industry, by replacing primary raw materials such as cement and ores with materials from the circular economy. Pretreatments of materials and recipes will be studied and the criteria for quality variation will be clarified.