Title:
Using Vibration to Control the Rheology of Concrete for 3D Printing
Author(s):
Pattaje
Publication:
Web Session
Volume:
ws_F23_Pattaje.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/29/2023
Abstract:
Concrete mixtures which are 3D printed typically do not contain coarse aggregates. In this study, vibration was used to manipulate the rheology of concrete mixtures which included coarse aggregates. Using an experimental design method called Box-Wilson central composite design (CCD), the rheology of the concrete was statistically modelled both during vibration and without vibration. The sensitivity of the mixture design parameters (volume of paste, volume of sand, and water to cement ratio) on the rheology of concrete was investigated. It was found that aggregates play a significant role in the behavior of concrete in its fresh state. The volume of total aggregates in a mixture and its water to cement ratio were found to have the greatest influence on the rheology. The equations developed from this statistical model can help guide changes to be made to printable mixture designs.