Sub-project C03 focuses on the dismantling of existing in-situ concrete source structures into reusable elements. The first step is to evaluate a large number of requirements for dismantling. This results in a data model with geo-metric and semantic information. For the geometric segmentation into reusable elements, efficient decomposition algorithms will be developed. In addition, spatio-temporal constraints for dismantling sequences of concrete ele-ments will be identified, taking into account both structural safety and logistical aspects. A key outcome will be the development of a construction kit containing the identified concrete elements with high recycling potential.