First, 50 g of slag were combined with activating solutions in a container with a diameter of 52 mm. Immediately after, the alkali-activated slag paste was prepared by mixing with an overhead stirrer, using a radial flow stirring blade of 29 mm diameter. The mixing procedure was as follows. First, the paste was blended at 500 rpm for 30 s. Then, for an additional 30 s, a fast (1500 rpm) mixing was applied. A rest time of 30 s and a final 1 min of fast mixing concluded the sequence.