Effect of Interlayer Time-Lapse and Workability Retention on Printed Concrete Performance

Debalina Ghosh, Paula Bran Anleu, Yann Le Pape, Zhongguo John Ma

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The rapid advancement of additive manufacturing technologies for concrete construction requires further understanding of material performance and its relationship with print parameters such as interlayer time-lapse and workability retention during the print. This study addresses the effects of the time delay between consecutive extruded layers on the mechanical performance of printed concrete using a mix designed by Quikrete. A series of specimens were prepared with printing delays of 10, 15, 30, and 60 min. This work correlates the change in fracture properties, mechanical performance, and workability retention with the interlayer time-lapse between two consecutive concrete layers. Interlayer time-lapse is defined as the time difference in printing of two consequent layers of concrete. It affects individual properties differently based on the loading direction and test types, but it is consistent in terms of interlayer performance. The understanding of the effect of interlayer time-lapse on the fracture properties between two consecutive printed layers fills the knowledge gaps in printed concrete research. Therefore, this study can help researchers perform required optimization and safely estimate the performance of printed concrete.

Original languageEnglish
Article number04023362
JournalJournal of Materials in Civil Engineering
Volume35
Issue number10
DOIs
StatePublished - Oct 1 2023

Funding

This research was supported by the DOE Additive Manufacturing Office under contract DE-AC05-00OR22725 with UT-Battelle LLC via Oak Ridge National Laboratory (ORNL) and the University of Tennessee. The authors would like to express their gratitude to Bin Tian and Anup Deb from Quikrete for developing the printable mix design and graciously providing the materials used in this research. The print nozzle was additively manufactured in the Manufacturing Demonstration Facility at ORNL.

Keywords

  • Concrete
  • Fracture properties
  • Interlayer bonding
  • Mechanical properties
  • Three-dimensional (3D) printing

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