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- W3201744106 abstract "Yield strength development of 3D printable concrete by the early age activation reactions plays a vital role in the printability of geopolymer concrete. This study presents a rheo-chemical approach to investigate the early age strength development due to alkali reactions for the formulation of suitable 3D printable one-part geopolymer concrete. The influence of design parameters, including activator content, thixotropic additive (Magnesium Alumino Silicate -MAS), and retarder (sucrose) dosage, on the rheological properties of concrete were assessed. The shear stresses of geopolymer concrete were measured with the aid of a rotational rheometer for various shearing protocols that represent the major stages of printing operation (pumping, extrusion and building). The measured rheological properties were related to reaction kinetics of geopolymer mixes using FT-IR spectroscopy and calorimetry. The results revealed that, with MAS, activator and sucrose content of 0.75 wt%, 10 wt% and 1.5 wt% of the binder respectively, the formulated one-part geopolymer showcased enhanced printing properties. This is further demonstrated by printing laboratory-scale specimens and evaluating the hardened properties." @default.
- W3201744106 created "2021-10-11" @default.
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- W3201744106 date "2021-01-01" @default.
- W3201744106 modified "2023-09-24" @default.
- W3201744106 title "Effect of Alkali Reactions on the Rheology of One-Part 3D Printable Geopolymer Concrete" @default.
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- W3201744106 doi "https://doi.org/10.2139/ssrn.3909195" @default.
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