An ab initio approach for thixotropy characterisation of (nanoparticle-infused) 3D printable concrete
By J. Kruger, S. Zeranka, G. V. van Zijl. Construction and Building Materials, 2019
224 citations recorded by the source corpus.
Abstract This paper presents a novel rheological thixotropy model that specifically appertains to the characterisation of materials that are suitable for 3D printing of concrete (3DPC). The model accounts for both physical and chemical influences on a material’s microstructure, denoted by R t h i x (re-flocculation) and A t h i x (structuration) respectively. Rheological analyses are performed on a reference material with varying superplasticizer (SP) and nano-silica (nS) dosages in order to determine their effects on the aforementioned parameters. Specific focus is placed on the re-flocculation thixotropy mechanism. The advantages of adding nanoparticles to concrete for 3DPC is practically validated by printing circular hollow columns until failure occurs. The result is supported by the thixotropy model, which is applied to the materials that are used for the 3DPC tests. It is concluded that, for this study, R t h i x is a better measure of thixotropy behaviour that is suitable for 3DPC than A t h i x .
Subfields: Automotive Engineering, Biomedical Engineering, Building and Construction
View Paper: https://www.semanticscholar.org/paper/81697b37dc236a8268fca3d09ec41dc58fa95168
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Automotive Engineering
- G. V. van Zijl
- V. Mechtcherine
- S. Figueiredo
- Fred Bos
- Kequan Yu
- Victor C. Li
- Venkatesh Nerella
- T. Ng
In Biomedical Engineering
In Building and Construction
Citations in the corpus
- On the emergence of 3D printable Engineered, Strain Hardening Cementitious Composites (ECC/SHCC) (2020, methodology): “…formwork; either a thixotropic formulation resulting in relatively high sti ff ness directly after mixing/ pumping (no-slump) is used [34,35,46 – 48] (generally these mixtures are thixotropic resulting in further structuration after deposition), or a less viscous mixture is pumped until it…”