Investigation of the rheology and strength of geopolymer mixtures for extrusion-based 3D printing

By Biranchi Narayan Panda, C. Unluer, M. Tan. Cement & Concrete Composites, 2018

418 citations recorded by the source corpus.

Abstract This study presents the development of fly ash-based geopolymer mixtures for 3D concrete printing. The influence of up to 10% ground granulated blast-furnace slag (GGBS) and silica fume (SF) inclusion within geopolymer blends cured under ambient conditions was investigated in terms of fresh and hardened properties. Evolution of yield stress and thixotropy of the mixtures at different resting times were evaluated. Mechanical performance of the 3D printed components was assessed via compressive strength measurements and compared with casted samples. SF demonstrated a significant influence on fresh properties (e.g. recovery of viscosity), whereas the use of GGBS led to higher early strength development within geopolymer systems. The feasibility of the 3D printing process, during which rheology was controlled, was evaluated by considering extrusion and shape retention parameters. The outcomes of this study led to the printing of a freeform 3D component, shedding light on the 3D printing of sustainable binder systems for various building components.

Subfields: Automotive Engineering, Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/ff115abb6032021c11a1f1e4258b6d1b393affd5

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Citations in the corpus

Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study (2020, background): “Until today, most of the proposed mix designs for 3DCP contained a high volume of ordinary Portland cement (OPC) [2,3,12,13].”
Investigation of the properties of alkali-activated slag mixes involving the use of nanoclay and nucleation seeds for 3D printing (2020, methodology): “123 Shear thinning property was measured by applying a constant shear rate of 300 s-1, while viscosity 124 recovery was measured by following a three-stage protocol, as previously described in [28].”