A simple sensitivity analysis with the most feasible range of parameters responsible for the cement-related part of the calculation in eqs. shows that the C-sink potential 𝐸 can be in the range from -0.9 to -1.1 kg CO 2 /kg of C-LWA pellets in their cured state, which shows that the binder has rather minor effect on the total C-sink. On the contrary, the C-sink can be significantly altered by varying the amount of biochar incorporated in the pellets. The proportions used in our study stem from an iterative process in which the easiness of pelletization and the apparent strength of the pellets were optimized -a further optimization remains possible though.