*4.5. Used % of Binders*

Used amount of cement was determined preserving the homogeneity of the mixture with minimum cement consumption.

Used amount of lime was set from the condition that the pH value of mixture shall be 12.4, securing the optimal conditions for the hydration process [61].

Test specimens with PolybondTM were prepared with the minimum recommended PolybondTM content according to organization standard [62] and the manufacturers' recommendations [49]. First the PolybondTM solution with water was formed, which is then added into the dry material before compaction. During preparation of the soil–fly ash mixtures, the previously determined optimal ash percentage (20%) was used. Used amounts of binders are given in Figures 1 and 2.
