Journal article
Halloysite reinforced 3D-printable geopolymers
Manufacturing Engineering, Department of Civil and Mechanical Engineering, Technical University of Denmark1
National Centre for Nano Fabrication and Characterization, Technical University of Denmark2
Colloids & Biological Interfaces, Biotherapeutic Engineering and Drug Targeting, Department of Health Technology, Technical University of Denmark3
Biotherapeutic Engineering and Drug Targeting, Department of Health Technology, Technical University of Denmark4
Department of Health Technology, Technical University of Denmark5
Department of Civil and Mechanical Engineering, Technical University of Denmark6
Imperial College London7
Department of Physics, Technical University of Denmark8
Center for Fast Ultrasound Imaging, UltraSound and Biomechanics, Department of Health Technology, Technical University of Denmark9
UltraSound and Biomechanics, Department of Health Technology, Technical University of Denmark10
Neutrons and X-rays for Materials Physics, Department of Physics, Technical University of Denmark11
Materials at the Interface of Biology, Nanocharacterization, National Centre for Nano Fabrication and Characterization, Technical University of Denmark12
Nanocharacterization, National Centre for Nano Fabrication and Characterization, Technical University of Denmark13
...and 3 moreThis study investigates the role of halloysite nanotube as a mineral-based thixotropic admixture to 3D printable geopolymer mortar. The first part of this paper focuses on the fundamental characterization of the thermal evolution of halloysite at 30–1000 °C. In the second part, we show how the calcination and concentration of halloysite influence the fresh and hardened properties of 3D-printable geopolymer mortar.
It was found that regardless of thermal treatment, using only 1–2 wt.% halloysite can significantly increase the rheological properties and buildability of the mortars without compromising their mechanical strength. However, the setting time of geopolymer only accelerated when highly reactive dehydroxylated halloysite was used.
Compared with mold-cast specimens, the mechanical properties of 3D-printed specimens were lower at early ages due to their higher surface dehydration; however, the gap became closer over time.
| Language: | English |
|---|---|
| Year: | 2023 |
| ISSN: | 1873393x and 09589465 |
| Types: | Journal article |
| DOI: | 10.1016/j.cemconcomp.2022.104894 |
| ORCIDs: | Ranjbar, Navid , Gundlach, Carsten , Kempen, Paul and Mehrali, Mehdi |
