Cement production is responsible for 8% of the world’s CO₂ emissions. The start-up C2CA Technologies B.V offers innovative solutions for transforming waste concrete into sustainable building materials. This is an enormously important contribution to the circular economy, as recycling concrete waste saves enormous amounts of energy and material resources [Circular Economy Action Plan]. An electric technology for the recycling of concrete waste is being developed within the CITADEL project to provide the process heat for thermal cracking at temperatures of between 500 and 700°C which is used to separate sand and cement constituents from each other. The aim is to use innovative electrical heating technologies to drastically reduce the CO₂ emissions of the process, to significantly increase energy efficiency, to improve the product quality, and to enable a more compact design and better process control.