Alkaline-activated fly ash as an alternative to cement in concrete mixtures

openaccess, Vol. 621 (5) 2024 / piątek, 24 maja, 2024

(Open Access)

DOI: 10.15199/33.2024.05.02

Zieliński Krzysztof, Herbowska Martyna, Krawczyk Jacek. 2024. Alkaline-activated fly ash as an alternative to cement in concrete mixtures. Volume 621. Issue 5. Pages 5-8. Article in PDF file

Accepted for publication: 18.03.2024 r.

The article presents the results of tests on concrete made using a geopolymer mineral binder. The concretes were made on the basis of alkaline-activated silica fly ash without the addition of cement. Three types of geopolymer concrete were made. The role of the activator in the prepared mixtures was played by a mixture of sodium base and water glass. Three solutions of sodium alkali with increasing molar concentration were prepared: 6M, 9M and 12M. The prepared solution was mixed in a 1:1 weight ratio with water glass. For each concentration, measurements were made at a ripening temperature of 20°C and after hardening for 24 hours at 60°C. Compressive and bending strength tests were performed after 28 days ofmaturing, as well as water absorption and frost resistance tests. The analysis of the obtained test results showed that geopolymer concrete can be used in construction as an alternative solution to standard common cements, generating amuch smaller carbon footprint than standard cements.
  1. Mikuła J. (red.): Rozwiązania proekologiczne w zakresie produkcji. Nowoczesne materiały kompozytowe przyjazne środowisku. Wydawnictwo PK, Kraków, 2014.
  2. Lelek-Borkowska U. Geopolimery, Open AGH, Akademia Górniczo-Hutnicza, 2022.
  3. Davidovits J. Geopolymer Chemistry and Applications, 5th Ed, Geopolymer Inst, 2009.
  4. Elzeadani M, Bompa DV, Elghazouli AY. One part alkali activated materials: A state-of-the-art review. Journal of Building Engineering. 2022; Vol. 57.
  5.  Provis JL. Alkali-activated materials. Cem. Concr. Res. 2018; s. 40-48.
  6. Inada Yuji: Geopolymer technology and prospects – low CO2 concrete that does not use cement, Mitsui & Co. Global Strategic Studies Institute Monthly Report, 2022.
  7. PN-EN 196-1:2016-07Metody badania cementu – Część 1: Oznaczanie wytrzymałości.
  8. PN-EN450-1:2012Popiółlotnydobetonu–Część1: Definicje, specyfikacje i kryteria zgodności.
  9.  PN-88/B-06250 Beton zwykły.
  10. PN-EN 12390-3:2019-07 Badania betonu – Część 3: Wytrzymałość na ściskanie próbek do badań.
  11.  PN-EN 12390-5:2019-8 Badania betonu – Część 5: Wytrzymałość na zginanie próbek do badań.
dr hab. inż. Krzysztof Zieliński, prof. PP, Politechnika Poznańska, Wydział Inżynierii Lądowej i Transportu ORCID: 0000-0002-3805-1108
mgr inż. Martyna Herbowska, absolwenci Politechniki Poznańskiej
mgr inż. Jacek Krawczyk, absolwenci Politechniki Poznańskiej

dr hab. inż. Krzysztof Zieliński, prof. PP, Politechnika Poznańska, Wydział Inżynierii Lądowej i Transportu ORCID: 0000-0002-3805-1108

Full paper:

DOI: 10.15199/33.2024.05.02

Article in PDF file