We have investigated the retarding influence of the additives on C 3 S hydration in a previous study . The retardation power of the additives is ordered as tartrate > citrate ≫ succinate. This observation qualitatively fits this study's observed effects on dissolution and nucleation. First, we note that succinate, which shows an extremely small retarding effect in pure C 3 S, neither influences the dissolution of C 3 S significantly nor the nucleation of Portlandite and C-S-H. For citric acid, we note a medium inhibiting effect on the dissolution of C 3 S at low undersaturations, a strong effect on the nucleation of Portlandite, and a medium impact on the nucleation of C-S-H. Finally, tartrate has the strongest inhibiting effects on C 3 S dissolution and C-S-H and Portlandite nucleation. Based on the data presented here, we cannot precisely compare the impact of the additives on the dissolution and nucleation steps during the hydration of C 3 S. Qualitatively, succinate does not affect either step, while tartrate and citrate inhibit both dissolution and nucleation. More work is needed to clarify the specific influence of admixtures on these steps and their relative impact on cement hydration.