Title:
Testing Rheological and Fracture Properties of 3D-Printable Concrete in the Fluid-to-Solid Open Time Window
Author(s):
Marcucci
Publication:
Web Session
Volume:
ws_F23_Marcucci.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
This research aims to design and validate testing setups for assessing the very early-stage mechanical properties of printable concrete, with a focus on tensile and shear strength, to propose standard testing methods and contribute to the standardization of 3D concrete printing technology. In this study, the designed shear and tensile testing methods were used to analyze the transition from fluid to solid states in sulfoaluminate cement-based concrete used for 3D printing. The investigation also assessed the role of different quantities of retarder admixture dosage and time on the fluid-to-solid transition and the correlation of the aforesaid properties with the printability characteristics of the mix. Rheometric tests, performed also to assess the thixotropy of the investigated mixtures, isothermal calorimetry and Vicat tests support these findings, providing a deeper understanding of the relationship between the strength development over time and hence the printability characteristics of the mix.