Combined utilization of red mud and mechanically activated fly ash in geopolymer

Authors

  • Gábor Mucsi University of Miskolc
  • Roland Szabó
  • Ádám Rácz
  • Ferenc Kristály
  • Sanjay Kumar

DOI:

https://doi.org/10.17794/rgn.2019.1.3

Keywords:

red mud, fly ash, grinding, geopolymer, strength, mineral phases

Abstract

This paper focuses on the investigation of the co-utilization of two major industrial waste materials, power station fly ash and red mud. Experimental studies were carried out to establish the correlation between the physical properties of a geopolymer product and a mixture composition. The effect of mechanical activation and the red mud dosage on the geopolymerisation was investigated. Geopolymerisation of mechanically activated fly ash has been carried out with various proportions of red mud ranging between 0–30 % by weight. The compressive strength of fly ash based geopoly- mer increased until 15 % of red mud addition. The optimal red mud addition in fly ash geopolymer was determined. The influence of red mud on phase composition and chemical bonds of the resulted geopolymer were determined by XRD analysis and FTIR studies. Due to the geopolymerisation reactions, new phases like hydroxy-cancrinite, faujasite and thenardite appeared in the product.

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Published

2018-08-16

How to Cite

Mucsi, G., Szabó, R., Rácz, Ádám, Kristály, F., & Kumar, S. (2018). Combined utilization of red mud and mechanically activated fly ash in geopolymer. Rudarsko-geološko-Naftni Zbornik, 34(1). https://doi.org/10.17794/rgn.2019.1.3

Issue

Vol. 34 No. 1 (2019): No. 44

Section

Other sciences and contributions

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