In this study we present a novel method for incorporating biochar into concrete. Instead of the simple addition of biochar to concrete as partial cement or aggregate replacement, we first processed the biochar into carbonrich lightweight aggregates (C-LWA). This allows to alleviate some of the issues related to the use of as-delivered biochar (dust, incompatibility with chemical additives, etc.). The C-LWA pellets are obtained by wet pelletization with cement and water and cold-bonding hardening. In this way, a stable, lightweight material with grain