The early properties of highly SCM-containing sustainable cements will continue to be determined by the OPC component due to its greater initial reactivity than SCM. Li et al. recently highlighted the beneficial utilization of aluminate phases in OPC systems, leading to an increased ettringite formation through a selective hydration control additive . Therefore, it is essential to improve the understanding of the control over the hydration reactions of aluminate phases in OPC and their effect on kinetics and viscoelastic properties.