The hydration characteristics of calcium sulfoaluminate cement (CSA) and ordinary Portland cement (OPC) blended pastes incorporating calcium sulfate (C$\overline{\text{S}}$) are investigated. The experimental characterization techniques were employed and complemented with thermodynamic calculations to provide in-depth understanding of the hydration of CSA/OPC blended system. The results showed that the hydration of C₃S in the CSA/OPC blended pastes was significantly delayed in comparison with the sole OPC paste. The delayed hydration of C₃S negatively affected the strength development of the CSA/OPC pastes. As the amount of C$\overline{\text{S}}$ increases, the induction period occurring between the initial peak and the intermediate peak was extended, thus increasing the initial setting time. The addition of C$\overline{\text{S}}$ to the CSA/OPC blends led to the two phenomena in the hydration of C₄A₃$\overline{\text{S}}$, (1) retardation of C₄A₃$\overline{\text{S}}$ hydration, and (2) formation of more ettringite after a few hours of hydration. The thermodynamic calculations indicated that the setting of the CSA/OPC blended system is mainly facilitated by hydration of C₄A₃$\overline{\text{S}}$ and by the formation of ettringite, while the major strength-giving phase is C-S-H that originates from the hydration of C₃S.

硫铝酸钙水泥（CSA）和普通硅酸盐水泥（OPC）掺入硫酸钙（C的水泥）的水合特性$\overline{\text{小号}}$）进行调查。采用了实验表征技术，并结合了热力学计算，以深入了解CSA / OPC混合体系的水合作用。结果表明，与唯一的OPC浆料相比，CSA / OPC混合浆料中C ₃ S的水合作用明显延迟。C ₃ S的延迟水合会对CSA / OPC浆料的强度发展产生负面影响。作为C量$\overline{\text{小号}}$增大初始峰和中间峰之间的感应时间，从而延长了初始设定时间。C的加法$\overline{\text{小号}}$CSA / OPC混合物的混合导致C ₄ A ₃水合的两种现象$\overline{\text{小号}}$，（1）C ₄ A _3的阻滞$\overline{\text{小号}}$水合，以及（2）水合数小时后形成更多的钙矾石。热力学计算表明，CSA / OPC混合体系的设置主要是由于C ₄ A _3的水合$\overline{\text{小号}}$并且通过钙矾石的形成，而主要的赋予强度的阶段是CSH，其源自C ₃ S的水合。