The reuse of carbon fibers is becoming increasingly important in view of the growing scarcity of resources and climate protection efforts. Particularly in the construction industry, the holistic consideration of closed material cycles is becoming increasingly important. The open cycle is closed by processing and forming carbon fibers into semi-finished products. Due to various technological hurdles, the continuous production of rebars from recycled carbon fibers with consistent quality is still subject to large variations. Although the use of carbon materials has long been established in other branches of industry such as aircraft construction, automotive engineering, etc., recycled carbon is rarely used. In contrast, the construction industry in particular offers an extraordinary opportunity to use recycled carbon as a reinforcement material in concrete. This makes it possible to close the material cycle on the one hand and to use CO2-reduced concrete matrices due to the corrosion resistance of carbon on the other. The objective of the research, founded by the Federal Ministry for Economic Affairs and Climate Action, is to investigate, characterize and optimize carbon rods made from recycled fibers for the use as reinforcement in concrete to achieve equivalent tensile and composite strength compared to semi-finished products made from virgin carbon fibers (vCF). A 600 mm long carbon fiber rebar with a bond length of 50 mm was embedded in a concrete cube in order to obtain a first indication of the bond behavior of the recycled carbon fiber (rCF) rebars (Zeisberg rCF Rebar®). The entire test setup and procedure was based on the RILEM RC6 pull-out test guideline and in accordance with the DAfStb guideline for non-metallic reinforcements. Measurement data were recorded using displacement transducers and force measurement. In order to achieve higher bond between the concrete and the rebar, the geometric dimensions of the bars and the structural design of the semi-finished tool will be further adapted and developed. A straight fiber orientation, reduction of pores or defects along the rebar axis are the most important characteristics for increasing strength of the composite. To determine this, the rebar was examined using computed tomography (CT) and microscopy. A further investigation was to determine the presence of defects in the rebar. Based on the various tests, a first characterization of these rebars made from rCF can be made.