Tailored yield stress for 3D printing using Low clinker cement - Low-Clinker-Cement-3D-Printing (LCC3D)

这项建议追求两个实质性目标。首先，将追踪和评估早期水泥水化过程中相关流变学决定参数的高度时间分辨（约10分钟）演化。其中熟料相比表面积的变化、形态的变化和形成水合物相的数量以及剩余未结合水和流变性活性水的可用性和数量起着重要的作用。这些参数和其他参数将通过不同的物理、化学和流变分析方法的组合来跟踪和量化。重要的是要强调，大多数提出的分析方法提供重叠的信息，允许交叉验证，以确认测量结果的一致性。第二部分将评价不同的流变活性添加剂对上述参数的影响。因此，有关建筑添加剂的影响和水泥水化叠加的基本工作机制以及随时间流变特性发展的重要信息有望得到。这些信息对于进一步深入了解新混凝土的流变学是必要的。

Two substantial goals are pursued in this proposal.Initially the highly time resolved (ca. 10 min) evolution of the relevant rheology determining parameters during the early cement hydration will be traced and evaluated. Here the evolution of the specific surface area of the clinker phases, the evolution of the morphology and the amount of the forming hydrate phases as well as the availability and amount of the residual unbound and rheology active water fraction play a significant role. These parameters and others will be traced and quantified by a combination of different physical, chemical and rheological analytic methods. Important to highlight that most of the proposed analytic methods provide overlapping information, allowing a cross validation in order to confirm the consistency of the measured results.In the second part the influence of different rheology active additives on the above mentioned parameters will be evaluated. Thereby important information on the effect of building additives and the fundamental working mechanisms of the superimposition of cement hydration and the development of rheological properties over time are expected. These information are compulsory for further in deep understanding of the rheology in fresh concretes.