The results are gathered in Figure and Figure . The samples were made with a w/s ratio of 0.4. The Na2O dosage was varied by changing the total amount of activating solution added to the samples. The SiO2/Na2O ratio of the silicate solution was reduced by adding NaOH to the activating solutions. Hence, for a constant Na2O dosage, a higher SiO2/Na2O ratio corresponds to a higher silicate dosage relative to the quantity of slag.