A new method to create one-part non-Portland cement powder

non-portland cement or alkali-activated slag is regarded as non-friendly for users, due to the corrosive nature of alkaline solution. this negatively affects the mass production and commercial viability of this cement. in this work, user- and eco-friendly one-part non-portland cement (npc) was prepared by blending ground-granulated blast-furnace slag (ggbfs) with stable dry activator (sda). sda was synthesized by mixing two moles of naoh with one mole of mgco3 or dolomite, followed by drying and pulverizing to a fixed particle size (namely, sda-m and sda-d, respectively). the mg source was chosen to prepare active magnesia with no firing. so, this process was considered as eco-friendly method for this purpose. ordinary portland cement (opc) was used for comparison. the sda-m content plays a circular role on the reduction of drying shrinkage of one-part npc. the sda-m has a potential impact on the compressive strength development of one-part npc compared to sda-d. npc containing 12 mass% sda-m (npc-12) gave compressive strength values superior to those of opc at all curing ages, suggesting that the npc-12 can be beneficially used as an alternative to opc as confirmed by x-ray diffraction (xrd), thermogravimetric analysis (tga/dtg), and scanning electron microscopy (sem).