Fly Ash Containing Alkali Activated Geopolymer Concrete: Effect of the Na2SiO3:NaOH Ratio and Temperature

  • Ritwik SarkarEmail author
  • S. P. Routray
Applications and Engineering Construction Materials


Geopolymer concrete was prepared using stone chips of various sizes, sand and fly ash, without using any cement. Na2SiO3 and NaOH solutions with three different ratios were used as the alkaline activator for the geopolymer system, and the compositions were studied for density, strength and phase evaluation after ageing and heat treatment at different temperatures up to 90 °C. Sodium aluminium silicate hydrate phase was found to be formed in the compositions as the reaction product of geopolymerization process and is responsible for the strength and density development. The reduction in the hydrated phase content at higher temperatures results in the reduction of density and strength values.


geopolymer flyash alkali activator Na2SiO3:NaOH ratio temperature 


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© Springer Fachmedien Wiesbaden GmbH, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Ceramic EngineeringNational Institute of TechnologyRourkelaIndia

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