Geopolymers based on fly ash and metakaolin with the addition of diatomite fume [Abstr.] / Kinga Korniejenko, Kinga Pławecka, Maria Hebdowska-Krupa, Michał Łach // W: Advanced Materials and Technologies ... więcej

Geopolymers based on fly ash and metakaolin with the addition of diatomite fume [Abstr.] / Kinga Korniejenko, Kinga Pławecka, Maria Hebdowska-Krupa, Michał Łach // W: Advanced Materials and Technologies AMT’2023 : Book of Abstracts, June 18th-21st 2023, Hotel Gołębiewski, Wisła, Poland / org. Silesian University of Technology. – Katowice : Archives of Foundry Engineering, 2023. – S. 74. – ISBN 978-83-63605-57-5

Geopolymers are modern, environmentally friendly, and inorganic aluminosilicate materials that, through their high mechanical properties, are used in construction industries. They are considered an alternative ... więcej

Geopolymers are modern, environmentally friendly, and inorganic aluminosilicate materials that, through their high mechanical properties, are used in construction industries. They are considered an alternative to Portland cement, especially for the most demanding applications due to strength properties. In addition, to increase their excellent mechanical properties, various types of additives are tested as reinforcements. One of the most popular is microsilica or silica fume. However, this additive gives promising results their resources are limited. The main goal of the article is to show the possibility of replacing microsilica with other material – diatomite. According to chemical composition, it contains about 80-90% SiO2, so it should be useful as a sand substitute in building materials. For this purpose, geopolymers were made on the basis of fly ash and sand or metakaolin and sand in a weight ratio of 50/50% with 1% and 3% addition of diatomite dust with a grain size of 0-0.063mm. The diatomite additive was investigated in the delivery conditions as well as after calcination at 850 °C. The following research methods have been applied: physical properties, including density and particle analysis, mechanical properties - compressive strength and microstructure - scanning electron microscopy. The results show potential for the addition of silica fume and the possibility of using a new material for construction purposes.