Title:
Exploring Early Age Deformations in 3D Printed Concrete Walls through Digital Image Correlation (DIC)
Author(s):
Avinaya Tripathi
Publication:
Web Session
Volume:
ws_S25_EarlyAge_AvinayaTripathi.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
3/30/2025
Abstract:
Conventional measurements to determine early age deformations in concrete cannot be easily applied to 3D printed concretes, because of the local heterogeneity brought about by layering variabilities, layer overburden, and print geometry, which results in non-uniform volume changes in 3D printed concrete. In this study, we use 3D DIC at early ages (from final set to 24 or 48 h) on 3D printed concrete wall geometries to determine the extent of deformation as a function of wall geometry, number and characteristics of the layers, type of concrete mixture (e.g., steel fiber reinforcement or nanoparticle reinforcement; aggregate volume fraction), and exposure conditions (temperature and RH). 3D DIC allows for the determination of full-field displacement field in real-time, providing insight into the mechanisms of volume change attributable to the above-mentioned parameters in a 3D printed wall. The principal strains in the three orthogonal directions are deconvoluted to obtain the effects of various parameters on shrinkage. This study aims to advance the understanding of shrinkage mechanisms in 3D printed concrete, informing optimized design and construction practices for concrete 3D printing.