Selecting Admixtures to Achieve Application-Required Rheology

Large scale 3D concrete printing : process and materials properties

“…This shows that the vertical stress experienced by the bottom layers is dependent on the layers added above. The static yield stress of cementitious material is defined as the minimum stress required to initiate flow from rest [157]. This yield stress originates from the microstructure of the cementitious suspension which has a network of powder particles and early nucleation of hydration product that builds up with time [91].…”