Various studies have employed SAOS measurements to explore the structural evolution of cementitious pastes over time . Huang et al., for instance, investigated the impact of gypsum content in C 3 A-gypsum pastes on their structural development, finding that increased ettringite formation leads to a higher storage modulus after 300 min of hydration . This study investigates the early-stage hydration kinetics and viscoelastic properties of tricalcium aluminate (C 3 A) suspensions in various sodium salts. Specifically, we seek to: