Hybrid materials based on fly ash, metakaolin, and cement for 3D printing / Joanna Marczyk, Celina Ziejewska, Szymon Gądek, Kinga Korniejenko, Michał Łach, Mateusz Góra, Izabela Kurek, Neslihan Doğan-Sağlamtimur, ... więcej

Hybrid materials based on fly ash, metakaolin, and cement for 3D printing / Joanna Marczyk, Celina Ziejewska, Szymon Gądek, Kinga Korniejenko, Michał Łach, Mateusz Góra, Izabela Kurek, Neslihan Doğan-Sağlamtimur, Marek Hebda, Magdalena Szechyńska-Hebda // Materials [Dokument elektroniczny]. – 2021, Vol. 14, Iss. 22, Spec. Iss., 24 s. : fot., rys., tab., wykr. – Tryb dostępu: https://www.mdpi.com/1996-1944/14/22/6874. – Oznaczenie ref./art.: 6874. – Bibliogr. 123 poz., Abstr. – Special Issue: Advanced Technologies for Sustainable Materials. – doi: 10.3390/ma14226874. – ISSN 1996-1944

Nowadays, one very dynamic development of 3D printing technology is required in the construction industry. However, the full implementation of this technology requires the optimization of the entire process, ... więcej

Nowadays, one very dynamic development of 3D printing technology is required in the construction industry. However, the full implementation of this technology requires the optimization of the entire process, starting from the design of printing ideas, and ending with the development and implementation of new materials. The article presents, for the first time, the development of hybrid materials based on a geopolymer or ordinary Portland cement matrix that can be used for various 3D concrete-printing methods. Raw materials used in the research were defined by particle size distribution, specific surface area, morphology by scanning electron microscopy, Xray diffraction, thermal analysis, radioactivity tests, X-ray fluorescence, Fourier transform infrared spectroscopy and leaching. The geopolymers, concrete, and hybrid samples were described according to compressive strength, flexural strength, and abrasion resistance. The study also evaluates the influence of the liquid-to-solid ratio on the properties of geopolymers, based on fly ash (FA) and metakaolin (MK). Printing tests of the analyzed mixtures were also carried out and their suitability for various applications related to 3D printing technology was assessed. Geopolymers and hybrids based on a geopolymer matrix with the addition of 5% cement resulted in the final materials behaving similarly to a non-Newtonian fluid. Without additional treatments, this type of material can be successfully used to fill the molds. The hybrid materials based on cement with a 5% addition of geopolymer, based on both FA and MK, enabled precise detail printing.