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International Journal of Zoology and Applied Biosciences Research Article
Low-alkali activation of fly ash for eco-brick production using industrial and agricultural waste materials
Rohit K Mahadule, Minakshee Sawankar, Raju M Belekar, Virendra K Sangode
Year : 2026 | Volume: 11 | Issue: 2 | Pages: 254-260
Received on: 27/12/2025
Revised on: 18/01/2026
Accepted on: 17/02/2026
Published on: 01/03/2026
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Rohit K Mahadule, Minakshee Sawankar, Raju M Belekar, Virendra K Sangode( 2026).
Low-alkali activation of fly ash for eco-brick production using industrial and agricultural waste materials
. International Journal of Zoology and Applied Biosciences, 11( 2), 254-260.
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Abstract
The increasing generation of fly ash from coal-based thermal power plants necessitates sustainable utilization strategies. In this work, fly ash obtained from Koradi, Khaparkheda, and Adani Tirora power plants in Maharashtra was investigated for eco-brick production using alkaline activation technology. The study compared conventional NaOH–Na?SiO? activation with a waste-based NaOH–aluminium foil system. Results showed that NaOH–Na?SiO? activated bricks developed higher compressive strength with lower heat treatment, whereas the waste-based system required furnace curing at 250 °C and yielded moderate strength. Despite this, the waste-based approach significantly reduced chemical usage and promoted effective waste utilization. The study demonstrates the potential of fly ash-based eco-bricks as a sustainable alternative to conventional clay-fired bricks, particularly for non-load-bearing applications.
Keywords
Fly ash, Alkali activation, Geopolymer, NaOH Molarity, Na2SiO3/NaOH Ratio.
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© The Author(s) 2025. This article is published by International Journal of Zoology and Applied Biosciences under the terms of the Creative Commons Attribution 4.0 International License (creativecommons.org), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
