Hybrid concrete consisting of fly ash (FA), ordinary portland cement (OPC), slag (GGBS) and sodium hydroxide (NaOH) shows deprived results for compressive strength. While alkali activated material cosisting of FA, GGBS and NaOH offers better compressive strength.
Why the partial (20-40%) replacement of aluminosilicate materials (FA and GGBS) with OPC reduces the strength concretes?
Previous researches based on FA, OPC and NaOH offers higher strength.
Influence of Sodium Content and Sodium Hydroxide Molarity might will work
Effect of Different NaOH Solution Concentrations on ... - MDPI
https://www.mdpi.com › pdf
by Z Huang · 2021 · Cited by 1 — According to different ferronickel alloy production methods, ferronickel slag can be classified as electric furnace ferronickel slag (EEFS)
Maybe this paper would help a bit: Article Effect of sodium hydroxide and sodium silicate solutions on ...
Also maybe look for the papers on ternary cements (blends of cements, GGBS, FA, limestone, etc.)
Usually partial (20-40%) replacement of aluminosilicate materials (FA and GGBS) with OPC reduce the strength concretes.
But in most cases, there are two main reasons why concrete increases strength:
1) The content of aluminosilicate material and the content of Ca in it;
2) The size modulus of aluminosilicate materials (FA and GGBS).
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