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   A new method to create one-part non-Portland cement powder  
   
نویسنده H. A. Abdel-Gawwad ,E. E. Hekal ,H. El-Didamony ,F. S. Hashem ,Aya H. Mohammed
منبع journal of thermal analysis and calorimetry - 2018 - دوره : 134 - شماره : 3 - صفحه:1447 -1456
چکیده    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).
کلیدواژه One-part NPC ,OPC ,Hydrotalcite ,Stable dry activator ,Drying shrinkage
آدرس Housing and Building National Research Center, Egypt. ACFA Industrial Company, Kingdom of saudi arabia, Ain Shams University, Chemistry Department, Egypt, Zagazig University, Chemistry Department, Egypt, Ain Shams University, Chemistry Department, Egypt, Future University in Egypt, Egypt
 
     
   
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