From the selected input materials 12 basic solidification formulas were proposed for three selected NS and each
formula contained 50 % wt. NS amount. The amount of water was added to obtain the required consistency of
solidification mixtures and it was approximately 30 – 50 % of solidification agents. When designing formulas,
emphasis was placed on the use of secondary raw materials, mainly two kinds of fly ash (CA, FA). The optimum
mixing ratio of inputs was determined on the basis of experimental testing of the properties of solidification
products.