In order to understand the rheological properties of cementitious suspensions at early stages, among other phases, the formation of ettringite and its time-dependent influence, whether by amount or morphology, has to be examined in detail using a suitable method to stop the hydration process. It is state-of-the-art to exchange water with isopropanol, however, the water initially remains in the system possibly leading to reduced time resolution. Our group raised the question if freeze-drying or the combination of the water-isopropanol exchange with subsequent freeze-drying might be a suitable technique to achieve an almost complete hydration stop at any time. Recently, it was shown under which circumstances low-pressure characterization techniques can be employed without destroying the samples due to loss of crystal bound water. Here, by implementing these recent results, we show under which circumstances freeze-drying indeed can be employed as fast hydration stop method.

为了了解早期胶凝悬浮液的流变特性，除其他阶段外，必须使用合适的方法详细检查钙矾石的形成及其随时间变化的影响，无论是数量还是形态，以停止水化过程. 用异丙醇交换水是最先进的技术，但是，水最初保留在系统中，可能导致时间分辨率降低。我们的小组提出了一个问题，如果冷冻干燥或水-异丙醇交换与随后的冷冻干燥相结合可能是一种合适的技术，可以在任何时候实现几乎完全的水合停止。最近，显示了在哪些情况下可以使用低压表征技术，而不会由于结晶结合水的损失而破坏样品。这里，