@article{252ad78949c64fc7b70807b88273238c,
title = "Linking fresh paste microstructure, rheology and extrusion characteristics of cementitious binders for 3D printing",
abstract = "Cementitious binders amenable to extrusion-based 3D printing are formulated by tailoring the fresh microstructure through the use of fine limestone powder or a combination of limestone powder and microsilica or metakaolin. Mixtures are proportioned with and without a superplasticizer to enable different particle packings at similar printability levels. A simple microstructural parameter, which implicitly accounts for the solid volume and inverse square dependence of particle size on yield stress can be used to select preliminary material combinations for printable binders. The influence of composition/microstructure on the response of pastes to extension or squeezing are also brought out. Extrusion rheology is used in conjunction with a phenomenological model to better understand the properties of significance in extrusion-based printing of cementitious materials. The extrusion yield stress and die wall slip shear stress extracted from the model enables an understanding of their relationships with the fresh paste microstructure, which are crucial in selecting binders, extrusion geometry, and processing parameters for 3D printing.",
keywords = "3D printing, extrusion, microstructure, rheology, wall shear stress, yield stress",
author = "Nair, {Sooraj A.O.} and Hussam Alghamdi and Aashay Arora and Iman Mehdipour and Gaurav Sant and Narayanan Neithalath",
note = "Funding Information: The authors sincerely acknowledge support from National Science Foundation (CMMI: 1727445) towards the conduct of this study. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of NSF, nor do the contents constitute a standard, specification or a regulation. We gratefully acknowledge the use of 3D printing and characterization facilities within Laboratory for the Science of Sustainable Infrastructural Materials (LS-SIM) at Arizona State University. Funding Information: The authors sincerely acknowledge support from National Science Foundation (CMMI: 1727445) towards the conduct of this study. The contents of this paper reflect the views of the authors who are responsible for the facts and accuracy of the data presented herein, and do not necessarily reflect the views and policies of NSF, nor do the contents constitute a standard, specification or a regulation. We gratefully acknowledge the use of 3D printing and characterization facilities within Laboratory for the Science of Sustainable Infrastructural Materials (LS‐SIM) at Arizona State University. Publisher Copyright: {\textcopyright} 2019 The American Ceramic Society",
year = "2019",
month = jul,
doi = "10.1111/jace.16305",
language = "English (US)",
volume = "102",
pages = "3951--3964",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "7",
}