Title:
Rheological Characterization of 3D Printable Mixtures Beyond Flow Initiation
Author(s):
Douba
Publication:
Web Session
Volume:
ws_F23_Douba.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
The innovations in 3D printing concrete generated an accelerated interest in cement rheology targeting maximizing structural buildup while maintaining rapid shear thinning. As a result, various rheological admixtures and extrusion methods were developed to meet the complex and demanding rheological profile of 3D printing concrete. Literature shows great emphasis on flow initiation measurements via shear rheology to prevent buildability collapse. However, there is still limited literature on the impact of the rheological characterization method and the underlying 3D printing admixtures mechanisms on the true in-situ rheological properties. In this work, we compare the effects of different types of rheological admixtures on shear and extensional rheological properties. In addition, we highlight a number of other rheological properties such as colloidal elastic modulus and critical strain in identifying other printing properties such as shape stability.