Cement production accounts for approximately 7-8% of global CO2 emissions and plays a major role in the overall climate impact of concrete. While established concrete recycling methods contribute significantly to resource conservation, they have so far not enabled the full reintegration of all concrete components into a closed concrete material cycle. In particular, the cement paste contained in waste concrete is often lost in the production of crushed sand, and coarse aggregates are typically not reused in their original function. A largely closed concrete material cycle therefore requires the recovery and reuse of both cement paste and aggregates. Significant potential exists in innovative processing techniques that enable the reuse of all components of concrete waste. Within the UpCement project, the Institute for Beneficiation and Recycling Systems Technology (IART) at TU Bergakademie Freiberg (TUBAF) investigated various methods for the targeted processing of waste concrete. Both electrical pulse fragmentation (EPF) and mechanical crushing methods were applied. The resulting product fractions were analysed in terms of composition and properties. The results highlight the potential for reusing cement paste and aggregates, pointing to opportunities for reducing primary resource consumption and CO2 emissions.