Rheological characterization of 3D printable geopolymers

This study demonstrates a two-step approach that enables quantification of concrete printability through dynamics mode rheological measurements; I) modeling shearing history during extrusion; II) monitoring the hardening evolution deposited material by applying strain smaller than critical strain. It is shown removed imposing pre-shearing above strain, and zero value yield stress measured for all specimens. At step II, linear extrapolation green strength development can quantify static at origin, which we used to printability. As far as this surpasses level exists in printed structure, retains its shape stability. We show performance model on series geopolymer mortars with wide range properties function composition, aging, consequences.